Saturday, October 5, 2019
I think that pornography is harmful to a couples relationship Essay
I think that pornography is harmful to a couples relationship - Essay Example In todayââ¬â¢s world of technology where everything has gone cyber, all multimedia including pornography is available on the internet easily accessible around the world and has become part and parcel of peopleââ¬â¢s sexual lives especially youngsters. I would strongly recommend all couples to accept this notion to be a healthy part of their relationships and, in case of any difference of opinions, to discuss openly about this agenda and give it a try to experience the fruitful outcome it generates between them. Through ages, surveys have been conducted to determine whether pornography is harmful for a relationship and what effects it produces for a couple. Consequently, researchers have identified few established facts about the aftereffects of watching pornography by a couple, individually or together. If we see in terms of collectively watching it, we come across two major advantages it provides as explained in a lecture by Mr. Chen: It contributes to the learning and sexual knowledge of couple. They can educate by identifying new exciting activities and ways to physically mate with oneââ¬â¢s partner. They can know new ways to stimulate the partner and about the dos and donââ¬â¢ts during sex. It also adds to their chemistry by enhancing the intimacy and ecstasy between them in bed. Couples tend to get bored soon due to repetition of similar activities in every session. Pornography makes them look forward to their regular intercourse sessions where they can try new things as seen on video, creating better thrill and variations (Chen, 14 March 2013). Variety in sexual relationship plays a vital part for almost all couples. According to Crooks and Baur, many individuals have a misconception that excitement and arousals stirred in their sexual experiences will always stay the same as in initial stage. Soon, they seek alternatives as their saving grace to gain satisfaction which they cannot get anymore from their own relationship (Crooks and Baur, pp. 201). This destroys a relationship completely and might ultimately result in breakup out of need for change! This is where the essential role of pornography sweeps in, creating new vibes of pleasures and sensuality. It is important for couple to allow its involvement in their sexual lives and discuss about it when the need arises. Speaking on an individual level, it is also necessary to have personal space to watch pornography occasionally when he or she feels too overdosed with intercourse. Also, according to an article provided in Eliaââ¬â¢s book, researches showed that individuals, especially men, claim that, inspired from tactics used in pornographic content, they discovered new methods to pleasure themselves and guide their partners to do the same during sex to stimulate them better. The craving to improvise and to try something different got fulfilled for most of the men by indulging themselves in self-pleasure while watching pornography (Elia, John and Albert, pp. 283). Se xual pleasures are the primary goal for any intimate activity carried out by a couple. In his book, ââ¬Å"Sex Industry: Porn and Prostitutionâ⬠(Pp. 269-273), suggests that self-pleasures while watching pornography motivates individuals to try these activities with their partners as well. They associate having intercourse with their partners to the reward of getting arousals and ultimately orgasm. There is a possibility of enhancement of emotional attachments in a couple through attaining orgasms which in turn are guided through education learnt via pornography. Therefore, it might prove to be beneficial to discover oneself through self-pleasure exercises during pornography and
Friday, October 4, 2019
Educator interview Essay Example | Topics and Well Written Essays - 750 words
Educator interview - Essay Example There are a number of qualifications that nurses, doctors or any health care professional must meet in order to become an 'educator'. The main qualification, of course, is to have obtained the education necessary to educate others. Formal schooling, training, practice and instruction are all key components to obtaining that education. "The current emphasis on providing quality undergraduate and postgraduate medical education has focused attention on the educational responsibilities of all doctors. There is a greater awareness of the need to train doctors as educators and courses have been set up to satisfy this need" (Hesketh 2001, pg 556). Other training that this individual must go through is how to develop curriculum and effective lesson planning. It is important that they also develop the skills to communicate with students as well as appraising and assessing a student's progress. These skills can be obtained by attending courses focused on the training of teachers. Health care professionals can also be teachers who work with individuals already employed in the health care industry. Such roles may include providing education for staff development and continuing education. ... The teaching individual must keep current on the latest technology and training available in the field in order to communicate that to colleagues. Another method for obtaining the information to be taught is by participating in the industry, as a nurse, as a doctor or professional or even as a researcher. "Nurses are increasingly involved in clinical trials. Any nurse involved in clinical trials may perform one or more of the following roles; patient educator, patient ally, direct care giver, coordinator of care and research administrator of research resources and participant in the conduct of the study" (Ambaum 1997, pg. 5316). These increasing responsibilities for nurses also opens up a whole new world of opportunities for these individuals. Now, they can not only be educators in the 'normal' sense of the world, but in other situations as well. In order for these professionals to do so, they must have the support that any teaching professional would need to accomplish their objective. "A medical educator has needs that are specific to educators and needs that are common to all medical faculty members. And educator needs time to perform educational duties, space to carry out educational activities, and money to buy time, space and other resources." " Just as important as time, space, and money are to the success of an educator is having an infrastructure that supports the educator and the educational mission" (Collins 2005, pp 914-915).According to Collins, creating such an infrastructure would include building a system that could provide educational leadership opportunities, funding for medical educational research, students, student and peer feedback and faculty development and mentoring. It would also
Thursday, October 3, 2019
Nutrition - Obesity Essay Example for Free
Nutrition Obesity Essay Objective: To assess the association between the consumption of fast food (FF) and body mass index (BMI) of teenagers in a large UK birth cohort. Methods: A structural equation modelling (SEM) approach was chosen to allow direct statistical testing of a theoretical model. SEM is a combination of confirmatory factor and path analysis, which allows for the inclusion of latent (unmeasured) variables. This approach was used to build two models: the effect of FF outlet visits and food choices and the effect of FF exposure on consumption and BMI. Results: A total of 3620 participants had data for height and weight from the age 13 clinic and the frequency of FF outlet visits, and so were included in these analyses. This SEM model of food choices showed that increased frequency of eating at FF outlets is positively associated with higher consumption of unhealthy foods (b ? 0. 29, Po0. 001) and negatively associated with the consumption of healthy foods (b ? A1. 02, Po0. 001). The SEM model of FF exposure and BMI showed that higher exposure to FF increases the frequency of visits to FF outlets (b ? 0. 61, Po0.001), which is associated with higher body mass index standard deviation score (BMISDS; b ? 0. 08, Po0. 001). Deprivation was the largest contributing variable to the exposure (b ? 9. 2, Po0. 001). Conclusions: The teenagers who ate at FF restaurants consumed more unhealthy foods and were more likely to have higher BMISDS than those teenagers who did not eat frequently at FF restaurants. Teenagers who were exposed to more takeaway foods at home ate more frequently at FF restaurants and eating at FF restaurants was also associated with lower intakes of vegetables and raw fruit in this cohort. International Journal of Obesity (2011) 35, 1325ââ¬â1330; doi:10. 1038/ijo. 2011. 120; published online 28 June 2011 Keywords: fast food; overweight; ALSPAC Introduction Childhood obesity prevalence have risen dramatically in the last 30 years in the Western world with the most recent figures for England and Wales show that 17% of boys and 16% of girls are obese. 1 An increase in the availability of calorie dense foods is implicated as one of the factors in the aetiology of the obesity epidemic. Fast food (FF) is one section of the food market that has grown steadily over the last few decades and it was worth d8. 9 billion in the United Kingdom in 2005. 2 FF is typically quick, convenient, cheap and Correspondence: Dr LK Fraser, School of Geography, University of Leeds, University road, Leeds LS2 9JT, UK. E-mail: l. k. [emailprotected] ac. uk Received 6 February 2011; revised 21 April 2011; accepted 12 May 2011; published online 28 June 2011 uniform in its production,3 but FF is often high in saturated fats, energy dense and has low micronutrient content. 4ââ¬â9 Studies from the United States of America have shown that children who consume FF (when compared with children who do not eat FF) have higher energy intake and higher fat intakes9,10 as well as lower vegetable and milk intake. 10,11 Therefore, the consumption of such foods could possibly result in a positive energy balance; and hence, weight gain. There is some evidence from longitudinal studies in the United States of America that consuming FF as a teenager can result in weight gain in both early12 and middle adulthood. 13 FF is often marketed to children and adolescents through television, internet and movie advertising,14ââ¬â17 with brand recognition being present from an early age. 18 The addition of toys as gifts with FF meals also attracts children. There is growing body of literature that has assessed the location of FF outlets and has found that areas of higher deprivation Fast food and body mass index LK Fraser et al 1326 have more FF outlets19ââ¬â21 and that FF outlets are often located close to schools. 22ââ¬â24 The majority of research to date has been undertaken in the United States of America, but a study that analysed the fat content of a FF meal in McDonaldââ¬â¢s and Kentucky Fried Chicken outlets in 35 countries showed that the amount of fat varied considerably between countries, within the same FF outlet. 25 This means that results from studies in the United States of America may not be generalisable to other countries. This study aims to assess the cross-sectional association between the consumption of FF and the body mass index (BMI) of teenagers in a large UK birth cohort. Methods The data for this study were obtained from the Avon Longitudinal Study of Parents and Children (ALSPAC),26 which is a birth cohort study where pregnant mothers who lived in the old Avon County in the United Kingdom (the Bristol region) were recruited in the early 1990s. A total of 14 541 mothers completed recruitment. Because of retrospective recruitment the total sample size was 15 224 fetuses and 14 610 live births. This paper presents data on the teenagers who attended the year 13 clinic and completed the year 13 questionnaire. Variables The food frequency data were collected from the questionnaires completed by mother (or carer) and separate questionnaires completed by the teenagers themselves at age 13 years. The data used from the carer questionnaire (collected at the same time point) referred to the questions ââ¬ËHow often does s/he eat in a FF restaurant? The responses to this question were collected as never/rarely, once a month, once every 2 weeks, once or twice per week, 3ââ¬â4 times a week, 5 or more times a week. The carers were also asked ââ¬ËIn total, how many portions of vegetables does s/he eat in a week (do not include potatoes)ââ¬â¢, ââ¬ËIn total, how many portions of raw fruit does s/he eat in a week? ââ¬â¢ These were free numerical responses, which were retained as a continuous variable for analyses. In the food frequency part of the teenager completed questionnaire the teenagers were asked ââ¬ËIf you ever buy food yourself from outside school, or from school vending machines, how often do you buy and eat each of the following things (include after school and weekends): chips, burger, pizza, sandwich, pies or pasties, chocolate, crisps, fruit and other food. ââ¬â¢ The height and weight data were collected at clinic visits at B13 years. The exact age, sex, height and weight were used to calculate a BMI standard deviation score (BMISDS) for each participant (1990 UK reference dataset). 27 The teenagers International Journal of Obesity were classified as obese if their BMISDS was greater than the 95th percentile (BMISDS41. 64). The physical activity data were collected via accelerometry at the age 13 clinic visit. 28 The participants wore an accelerometer for seven consecutive days and the measure used from this is mean counts per minute, which is a continuous variable. A deprivation score was assigned to each participant by matching the coordinates of their residential address (when carer questionnaire was completed) to the appropriate lower super output area. Each lower super output area has an index of multiple deprivation score (Index of Multiple Deprivation 2007 (IMD))29 assigned from the local census data. This is a continuous variable in which a higher number indicates an area of higher deprivation. Ethnicity was assigned as per the childââ¬â¢s ethnicity into a binary variable of ââ¬Ëwhite Britishââ¬â¢ and ââ¬Ëotherââ¬â¢ ethnicity. Statistical modelling Descriptive statistics were performed in STATA version 10 (StataCorp LP, College Station, TX, USA). A structural equation modelling (SEM) approach was chosen to allow direct statistical testing of a theoretical model. SEM has many benefits over traditional regression techniques, which include the ability to model equations simultaneously and the incorporation of latent variables. 30 SEM is a combination of confirmatory factor and path analysis, which allows for the inclusion of latent (unmeasured) variables. 31 This approach was used to build two models: the effect of FF outlet visits and food choices and the effect of FF exposure on consumption and BMI. The SEM analyses were undertaken in AMOS version 17. 0 (IBM SPSS, USA). The hypothesised model for food choices is shown in the results section (Figure 2). The observed variables are displayed as boxes and latent variables as circles. Each observed variable has an associated random error term and each latent variable has an associated disturbance term, which represents the variance in the latent variable that has not been explained by the observed variables associated with that latent variable. Regression paths are shown by singleheaded arrows and covariances by double-headed curved arrows. The model fit was assessed by two indices; the comparative fit index (CFI) and the root mean square error of approximation (RMSEA). The CFI is a comparison of the hypothesised model compared with an independence model where all parameters are assumed to be independent. The RMSEA gives an indication of ââ¬Ëhow well would the model, with unknown but optimally chosen values, fit the population covariance matrix if it were availableââ¬â¢. 32 A combination of CFI40. 95 and a RMSEA of o0. 50 is a sign of good model fit. The w2-test of overall fit is very sensitive to large sample size so has not been used in these models. 30 The two models were constructed a priori using previous research. The nutritional content of chips, burgers, pizza and Fast food and body mass index LK Fraser et al 1327 pies are known to be high in saturated fat and energy and therefore are ââ¬Ëunhealthyââ¬â¢,4ââ¬â9,33 whereas fruit and vegetables are known to contain fibre and vitamins and so are classified as ââ¬Ëhealthyââ¬â¢. Exposure to FF outlets is known to be higher in areas of higher deprivation. 19ââ¬â21 In the food choices model, unhealthy consumption (latent variable) was modelled from the frequency of consumption of chips, burger, pizza and pies (reported by the teenagers themselves), and the healthy consumption was modelled from the number of pieces of vegetables and raw fruit consumed by the teenager (maternal report). The number of times that the teenager visited a FF outlet (maternal report) was regressed on the unhealthy and healthy consumption variables. The model for the effect of FF exposure on consumption and BMISDS is shown in Figure 3. Here exposure is a latent variable modelled from maternal and paternal takeaway frequency and deprivation score. The exposure is regressed on the number of visits to FF outlet. The BMISDS at age 13 years is the main outcome of this model. Ethical approval for the study was obtained from the ALSPAC Law and Ethics Committee and the local research ethics committees. Results A total of 3620 participants have data for height and weight from the age 13 clinic and the frequency of FF outlet visits, and were included in these analyses (SEM cannot use individuals with missing data). A total of 1711 (47. 3%) were boys and 456 (12.6%) obese. The descriptive statistics are shown in Table 1. Frequency of visiting FF outlets and food consumption frequencies are shown in Figure 1. The results of model 1 are shown in Figure 2 with regression weights shown in Table 2. This model showed that increased frequency of eating at FF outlets was positively associated with higher consumption of unhealthy foods (b ? 0. 29, Po0. 001) and negatively associated with the consumption of healthy foods (b ? A1. 02, Po0. 001). The CFI for model 1 was 0. 98 and the RMSEA was 0. 05 (90% confidence interval 0. 044, 0. 058). These represent good approximate model fit. Table 1. The results of model 2 are shown in Figure 3 with regression weight shown in Table 3. This model showed that increased exposure to FF increased the frequency of visits to FF outlets (b ? 0. 61, Po0. 001), which in turn was associated with higher BMISDS (b ? 0. 08, Po0. 001). Deprivation was the largest contributing variable to the exposure (b ? 9. 2, Po0. 001). The CFI for model 2 was 0. 98, and the RMSEA was 0. 021 (90% confidence interval 0. 009, 0. 033). These represent very good approximate model fit. Discussion This study shows that teenagers who are exposed to more unhealthy foods at home are more likely to eat at FF restaurants and have a higher BMISDS. The negative association of increased visits to FF outlets on consumption of healthy foods (fruit and vegetables) has also been demonstrated. The FF restaurant use in this analysis was reported by the mother or main carer of the teenager and showed that nearly 60% of all the teenagers ate at a FF restaurant at least once a month. This appears to be less frequently than in the United States of America, where studies showed that 60% of older children and adolescents ate FF more than once per week34 and that B30% of children ate at a FF restaurant on any typical day. 9. As one part of the SEM this study showed that eating at a FF outlet was associated with a higher BMISDS. There were no previous UK studies to compare these results with, but previous studies from the United States of America have not found consistent results. Boutelle et al. 11 found no association between frequency of FF consumption and adolescent BMI or weight status, and an Australian study Descriptive statistics Mean BMISDS Deprivation (IMD 2007)29 Physical activity (c. p. m. ) Raw fruit (portions per week) Vegetables (portions per week) s. d. Median IQR 0. 29 13. 7 541 9. 5 9. 5 1. 14 11. 4 190 7 7 0. 024 10. 6 511 8 8 A0. 47, 1. 06 5. 9, 17. 0 404, 653 5, 14 5, 12 Abbreviations: BMISDS, body mass index standard deviation score for age and sex; c. p. m. , cycles per minute; IMD 2007, Index of Multiple Deprivation 2007; IQR, interquartile range. Figure 1 Food frequency data. International Journal of Obesity Fast food and body mass index LK Fraser et al 1328 Figure 2 Results of SEM model of food choices. Table 2 Results of SEM model of food choices Regression weights a Unhealthyââ¬â¢fast food Healthyââ¬â¢fast food Chipsââ¬â¢unhealthy Burgerââ¬â¢unhealthy Fruitââ¬â¢healthy Vegetablesââ¬â¢healthy Pizzaââ¬â¢unhealthy Piesââ¬â¢unhealthy Estimate s. e. CR P 0. 285 A1. 023 1. 000 0. 732 1. 000 1. 157 0. 774 0. 530 0. 021 0. 124 13. 439 A8. 274 o0. 001 o0. 001 0. 016 45. 243 o0. 001 0. 148 0. 018 0. 016 7. 802 42. 483 32. 720 o0. 001 o0. 001 o0. 001 Abbreviations: CR, critical ratio; SEM, structural equation modeling. aAll consumption variables units: never/rarely, once a month, once every 2 weeks, once or twice per week, 3ââ¬â4 times a week, 5 or more times a week. showed that FF eaten at home (but not away from home) was associated with higher BMI in adolescents (MacFarlane). Two longitudinal studies using data from the CARDIA study found that higher FF intake in adolescence was associated with higher BMI in young adulthood12 and those who ate FF more than twice a week had put on an extra 4. 5 kg of weight 15 years later. 13 The teenagers who ate more frequently at FF restaurants were more likely to eat less fruit and vegetables, as well as consume more unhealthy foods (chips, burger, pizza, pies) than those teenagers who ate at FF restaurants less frequently. This is an indication that the consumption of unhealthy foods may displace healthy food choices. This is similar to previous research in the United States of America, International Journal of Obesity which showed that children who ate FF consumed 45 g less vegetables per day than children who did not eat FF. 10 At age 13 years the food frequency data were a combination of maternal and self-report from the teenagers, but the total macro- and micronutrient values could not be assessed in this study as these data were not yet available at the time of writing. Deprivation was the largest contributor to the FF exposure variable. This could be explained by the fact that those of higher deprivation eat more FF because of the relative cheapness of FF. It has also been shown in many studies in the United Kingdom and the United States of America that areas of higher deprivation have more FF outlets than more affluent areas therefore, FF is more readily available. 35 An interesting economics paper from the United States of America showed that increasing the cost of FF by $1 could decrease BMI by 0. 78 units. 36 The increased consumption of unhealthy foods (chips, burger, pizzas and pies) by those teenagers who ate more frequently at FF outlets was not surprising, but the associated negative effect of the consumption of fruit and vegetables by these participants is important. These teenagers will not only be consuming more of the saturated fat and salt from the burgers, and so on, but at the same time they are not consuming important nutrients from fruit and vegetables. Although many FF outlets now offer more healthy alternatives such as fruit and vegetables, the consumers may still be choosing the unhealthy foods. Fast food and body mass index LK Fraser et al 1329 The FF question completed by the carer did not specify what constituted FF so some respondents may only count large franchises as FF whereas others may use a broader definition that includes independent takeaways. Although the frequency of eating at a FF restaurant was asked, the carers were not asked about the food eaten from these establishments and many FF restaurants now offer more ââ¬Ëhealthyââ¬â¢ alternatives. Although the majority of FF items do not meet the Food Standards Agency nutrient standards for total fat, saturated fat, sugar and sodium there are wide variations in similar products from different FF outlets with sodium content varying by up to four times in fried chicken products. 37 Therefore, having data on which food items were consumed from which FF outlet would further enhance future studies. There was no information on why the teenagers ate at FF restaurants, and key questions for the future include; was there no alternative eating establishments in their neighbourhood? Did they prefer FF to other meals or was the cost of food important? Conclusions This study has shown that the teenagers who ate at FF restaurants consumed more unhealthy foods and were more likely to have higher BMISDS than those teenagers who did not eat frequently at FF restaurants. Teenagers who were exposed to more takeaway foods at home ate more frequently at FF restaurants. Eating at FF restaurants was also associated with lower intakes of vegetables and raw fruit in this cohort. Figure 3 The SEM model of FF exposure and BMI. Table 3 Results of SEM model of FF exposure and body mass index Regression weights Fast food ââ¬â¢exposure. Maternal fast foodââ¬â¢exposure Deprivationââ¬â¢exposure Paternal fast foodââ¬â¢exposure BMISDSââ¬â¢fast food BMISDSââ¬â¢c. p. m. a Estimate s. e. CR 0. 61 1. 000 9. 20 0. 66 0. 08 0. 00 0. 07 8. 654 1. 07 0. 08 0. 02 0. 00 8. 605 8. 680 3. 586 A3. 351 P o0. 001 o0. 001 o0. 001 o0. 001 o0. 001 Abbreviations: BMISDS, body mass index standard deviation score for age and sex; c. p. m. , cycles per minute; CR, critical ratio; FF, fast food; IMD 2007, Index of Multiple Deprivation 2007; SEM, structural equation modeling. a All consumption variables units: never/rarely, once a month, once every 2 weeks, once or twice per week, 3ââ¬â4 times a week, 5 or more times a week. Strengths/limitations This is a large dataset with good-quality height and weight data taken at clinic visits by trained staff using validated equipment. There were food consumption data about the teenagers available from both the teenagers and their carers, but this is a cross-sectional study so causation cannot be implied from this data. As expected in a longitudinal study there is attrition and the subcohort used in this study may not be truly representative of the whole cohort. Conflict of interest The authors declare no conflict of interest. Acknowledgements. We are extremely grateful to all the families who took part in this study, the midwives for their help in recruiting and the whole ALSPAC team, which include interviewers, computer and laboratory technicians, clerical workers, research scientists, volunteers, managers, receptionists and nurses. The UK Medical Research Council (grant ref: 74882), The Wellcome Trust (grant ref: 076467) and the University of Bristol provide core support for ALSPAC. LKF was funded by ESRC/MRC studentship. References 1 Craig RS. Health survey for England 2007, 2008. Available from http://www. natcen. ac. uk/study/health-survey-for-england-2007. 2 Keynote.UK fast food and home delivery outlets, 2006. International Journal of Obesity Fast food and body mass index LK Fraser et al 1330 3 DeMaria AN. Of fast food and franchises. J Am Coll Cardiol 2003; 41: 1227ââ¬â1228. 4 Astrup A. Super-sized and diabetic by frequent fast-food consumption? Lancet 2005; 365: 4ââ¬â5. 5 Brown K, McIlveen H, Strugnell C. Young consumers and the hospitality spectrum. Appetite 1998; 31: 403. 6 Harnack LJ, French SA, Oakes JM, Story MT, Jeffery RW, Rydell SA. Effects of calorie labeling and value size pricing on fast food meal choices: results from an experimental trial. Int J Behav Nutr Phys Act 2008; 5: 63. 7 Lewis LB, Sloane DC, Nascimento LM, Diamant AL, Guinyard JJ, Yancey AK et al. African Americansââ¬â¢ access to healthy food options in South Los Angeles restaurants. Am J Public Health 2005; 95: 668ââ¬â673. 8 Paeratakul S, Ferdinand DP, Champagne CM, Ryan DH, Bray GA. Fast-food consumption among US adults and children: dietary and nutrient intake profile. J Am Diet Assoc 2003; 103: 1332ââ¬â1338. 9 Schmidt M, Affenito SG, Striegel-Moore R, Khoury PR, Barton B, Crawford P et al. Fast-food intake and diet quality in black and white girls the national heart, lung, and blood institute growth and health study. Arch Pediatr Adolesc Med 2005; 159: 626ââ¬â631. 10 Bowman SA, Gortmaker SL, Ebbeling CB, Pereira MA, Ludwig DS. Effects of fast-food consumption on energy intake and diet quality among children in a national household survey. Pediatrics 2004; 113: 112ââ¬â118. 11 Boutelle KN, Fulkerson JA, Neumark-Sztainer D, Story M, French SA. Fast food for family meals: relationships with parent and adolescent food intake, home food availability and weight status. Public Health Nutr 2007; 10: 16ââ¬â23. 12 Duffey KJ, Gordon-Larsen P, Jacobs DR, Williams OD, Popkin BM. Differential associations of fast food and restaurant food consumption with 3-y change in body mass index: the Coronary Artery Risk Development in Young Adults Study. Am J Clin Nutr 2007; 85: 201ââ¬â208. 13 Pereira MA, Kartashov AI, Ebbeling CB, Van Horn L, Slattery M, Jacobs DR et al. Fast-food habits, weight gain, and insulin resistance (the CARDIA study): 15-year prospective analysis. Lancet 2005; 365: 36ââ¬â42. 14 Sutherland LA, MacKenzie T, Purvis LA, Dalton M. Prevalence of food and beverage brands in movies: 1996ââ¬â2005. Pediatrics 2010; 125: 468ââ¬â474. 15 Powell LM, Szczypka G, Chaloupka FJ. Trends in exposure to television food advertisements among children and adolescents in the United States. Arch Pediatr Adolesc Med 2010; 164: 794ââ¬â802. 16 Hillier A, Cole BL, Smith TE, Yancey AK, Williams JD, Grier SA et al. Clustering of unhealthy outdoor advertisements around child-serving institutions: a comparison of three cities. Health Place 2009; 15: 935ââ¬â945. 17 Lingas EO, Dorfman L, Bukofzer E. Nutrition content of food and beverage products on Web sites popular with children. Am J Public Health 2009; 99(Suppl 3): S587ââ¬âS592. 18 Robinson TN, Borzekowski DLG, Matheson DM, Kraemer HC. Effects of fast food branding on young childrenââ¬â¢s taste preferences. Arch Pediatr Adolesc Med 2007; 161: 792ââ¬â797. International Journal of Obesity. 19 Cummins SCJ, McKay L, MacIntyre S. McDonaldââ¬â¢s restaurants and neighborhood deprivation in Scotland and England. Am J Prev Med 2005; 29: 308ââ¬â310. 20 Fraser LK, Edwards KL. The association between the geography of fast food outlets and childhood obesity rates in Leeds, UK. Health Place 2010; 16: 1124ââ¬â1128. 21 Macdonald L, Cummins S, Macintyre S. Neighbourhood fast food environment and area deprivation-substitution or concentration? Appetite 2007; 49: 251ââ¬â254. 22 Neckerman KM, Bader MDM, Richards CA, Purciel M, Quinn JW, Thomas JS et al. Disparities in the food environments of New York City public schools. A J Prev Med 2010; 39: 195ââ¬â202. 23 Davis B, Carpenter C. Proximity of fast-food restaurants to schools and adolescent obesity. Am J Public Health 2009; 99: 505ââ¬â510. 24 Seliske LM, Pickett W, Boyce WF, Janssen I. Density and type of food retailers surrounding Canadian schools: variations across socioeconomic status. Health Place 2009; 15: 903ââ¬â907. 25 Stender S, Dyerberg J, Astrup A. Fast food: unfriendly and unhealthy. Int J Obes 2007; 31: 887ââ¬â890. 26 Golding J, Pembrey M, Jones R, Team AS. ALSPAC-The Avon Longitudinal Study of Parents and Children ââ¬â I. Study methodology. Paediatr Perinat Epidemiol 2001; 15: 74ââ¬â87. 27 Cole TJ, Freeman JV, Preece MA. Body-mass index reference curves for the UK, 1990. Arch DisChild 1995; 73: 25ââ¬â29. 28 Riddoch CJ, Leary SD, Ness AR, Blair SN, Deere K, Mattocks C et al. Prospective associations between objective measures of physical activity and fat mass in 12ââ¬â14 year old children: the Avon Longitudinal Study of Parents and Children (ALSPAC). Br Med J 2009; 339: b4544. 29 Index of Multiple Deprivation 2007 (IMD 2007). 30 Kline R (ed) Principles and Practice of Structural Equation Modeling. The Guildford Press: New York, 2005. 31 Tomarken AJ, Waller NG. Structural equation modeling: strengths, limitations, and misconceptions. Annu Rev Clinic. Psychol 2005; 1: 31ââ¬â65. 32 Byrne BM (ed). Structural Equation Modelling with AMOS. Lawrence Erbaum Associates: London, 2001. 33 Astrup A, Dyerberg J, Selleck M, Stender S. Nutrition transition and its relationship to the development of obesity and related chronic diseases. Obes Rev 2008; 9: 48ââ¬â52. 34 Taveras EM, Berkey CS, Rifas-Shiman SL, Ludwig DS, Rockett HRH, Field AE et al. Association of consumption of fried food away from home with body mass index and diet quality in older children and adolescents. Pediatrics 2005; 116: E518ââ¬âE524. 35 Fraser LK, Edwards KL, Cade J, Clarke GP. The geography of fast food outlets: a review. Int J Environ Res Public Health 2010; 7: 2290ââ¬â2308. 36 Powell LM. Fast food costs and adolescent body mass index: evidence from panel data. J Health Econ 2009; 28: 963ââ¬â970. 37 Dunford E, Webster J, Barzi F, Neal B. Nutrient content of products served by leading Australian fast food chains. Appetite 2010; 55: 484ââ¬â489. Copyright of International Journal of Obesity is the property of Nature Publishing Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holders express written permission. However, users may print, download, or email articles for individual use.
Chemical Synthesis of a Gene: Phosphodiester Approach
Chemical Synthesis of a Gene: Phosphodiester Approach Chemical synthesis of a gene is the process of synthesizing an artificially designed gene into a physical DNA sequence by chemical methods. The amino acid sequence of the protein encoded by a gene enables the deduction of base sequence of the concerned gene. From the amino acid sequence of the protein and using a set of optimal codons, the nucleotide sequence of the gene can be back translated. However, the degeneracy of genetic code may present some problems, but a functional sequence of the gene can nonetheless be worked out and can be optimized for codon usage as well as for base composition. In principle, a DNA synthesizer can be used to synthesize the DNA sequence chemically and this can be cloned in the usual manner. But this is not so simple. A synthesizer will add bases sequentially one at a time to the growing oligonucleotide chain through a series of chemical reactions and washing steps. Synthesis of oligonucleotides 30-50 bases long is very reliable, longer sequences can be synthesized but the practical limit is not more than 100 bases. One way to solve this is to synthesize short fragments and join them chemically or enzymatically to create the longer fragment. However, the synthesizer makes single-stranded DNA, so the complementary strand has to be synthesized again to create a double-stranded DNA. It involves a lot of work but is achievable. Early studies. The synthesis of nucleic acids in the laboratory started about thirty years ago. Early synthetic efforts used phosphodiester approach which enabled the synthesis of short oligonucleotides of 10-20 nucleotides. This approach was based on the selection of the proper condensing agents for phosphodiester bond formation and at the same time suitable protective groups were employed for the bases and the ribose moiety. These oligonucleotides were then assembled into longer DNA fragments with the help of kinase and DNA ligase. From the known primary structure of a ribonucleic acid, tyrosine tRNA, Dr H Khorana and his colleagues deduced the DNA sequence and synthesized successfully a DNA segment containing 200 bp coding for the structural gene for tyrosine tRNA. However, the low yields in the condensation step, the long reaction times, and especially the time-consuming purification of intermediates led to believe that chemical gene synthesis is unlikely to become a standard lab oratory method. Since then, the procedure for oligonucleotide synthesis has been improved by several workers and they provide different approaches for synthesis as well as protection of bases and sugar moieties. There are three distinct methods: (1) phosphodiester approach, (2) phosphotriester or phosphate triester approach and (3) phosphite triester or phosphoramidite approach. Phosphodiester approach This method involves the formation of an ester linkage between an activated phosphate group of one nucleotide with the hydroxyl group of another nucleoside, thus forming the natural phosphodiester bridge between the 5-OH of one nucleoside unit and the 3-OH of the next. Here, 3-O-acetylnucleoside-5-O-phosphate (a) is activated by N,N-dicyclo- hexylcarbodiimide (DCC) or p-toluenesulphonylchloride(PTS/PTsCl) and subjected to react with a 5-O-protected nucleoside (b) to give a protected dinucleoside monophosphate or phosphodiester (c). Activation of phosphate moiety is essential for easier formation of the phosphodiester linkage and this is mediated by DCC or PTsCl. Now, to increase the chain length, one has to remove the 3-O-acetyl group by base catalysed hydrolysis. Further chain elongation is carried out by repeating the process. The major drawback of the phosphodiester method is the formation of pyrophosphate oligomers and oligonucleotides branched at the internucleosidic phosphate. Phosphotriester approach In this method, oligonucleotide branch formation is avoided by protecting the phosphate group with an ethylcyano group. A nucleotide containing 5-OH protected and phosphate protected by MMT and 2-cyanoethyl group respectively (compound a) is activated with 2,4,6-Triisopropylbenzenesulfonyl chloride (TPSCl) and subjected to reaction with a 3-O-protected nucleoside (b). This generates a dinucleoside monophosphate or phosphotriester (c) in which phosphate group is protected by 2-cyanoethyl group. The basic difference between phosphodiester and phosphotriester method is that, in phosphodiester method, the phosphate group is protected by two phosphoester linkage but in phosphotriester method the phosphate group is protected by one extra phosphoester linkage with 2-cyanoethyl group. In phosphotriester method, the formation of oligonucleotide branch at the internucleosidic phosphate is avoided. Phosphite triester or phosphoramidite approach The phosphite triester or phosphoramidite approach for oligonucleotide synthesis was based upon the use of phosphoramidite monomers and the use of tetrazole catalysis. In phosphite triester method, the starting compound is N-6-benzoyldeoxyadenosinephosphoramidite (if adenine is the first base) where the phosphorous atom is in the +3 oxidation state. So unlike the other methods, the formation of oligonucleotides branch is not possible in this process. In this approach, the oligonucleotide is synthesized by a series of reactions described below. Protection of base and sugar In this step, the free -NH2 group of the bases are protected by benzoylation or acylation depending upon the nature of bases. The 5-hydroxyl group is also protected by dimethoxytrityl group (DMT), which protects only primary hydroxyl group but not secondary. The reactions are illustrated in CSG_Fig 3., the blocked bases are shown in the inset. Formation of phosphite triester or phosphoramidite In this step phosphite triester is synthesized by a series of reactions. First, 2-cyanoethanol on reaction with phosphorus trichloride produces an intermediate compound which on further reaction with di-isopropylamine (two-equivalent) and 5-OH protected nucleoside (one-equivalent) produces phosphite triester (CSG_Fig 4). This phosphoramidite will be repeatedly used during the oligonucleotide synthesis process described below. The synthesis procedure The synthesis is carried out in several steps described below: Step 1: The deblocking step The first base, which is attached to the solid support, is at first inactive because all the active sites have been blocked or protected. The free -NH2 groups in the bases remains protected by benzoylation or acylation depending upon the bases and the -OH group is protected by dimethoxytrityl group (DMT). To add the next base, the DMT group protecting the 5-hydroxyl group must be removed (deblocking). This step is also called detritylation. This is done by adding either dichloroacetic acid (DCA) or trichloroacetic acid (TCA) in dichloromethane (DCM), to the reaction column. The 5-hydroxyl group is now the only reactive group on the base monomer. This ensures that the addition of the next base will only bind to that site. The reaction column is then washed to remove any extra acid and by-products. Step 2: Base condensation The step2 is basically a condensation step. Now prior to addition of the well protected nucleotide to the column, it is essential to activate the phosphate group, so that the nucleophilic attack on phosphorous atom takes place easily. This is best done by adding tetrazole to the nucleotide in dichloromethane medium. In presence of tetrazole, diisopropylamine group of the nucleotide becomes positively charged and hence its departure would be easier after nucleophilic attack of 5-hydroxyl group of the previous nucleotide which is attached with resin column. After the reaction, the column was washed to remove extra tetrazole, unbound nucleotide and byproduct (diisopropylamine). Step 3: Capping In case of unreacted nucleoside attached with resin, the 5-hydroxyl group is unprotected this may react later with the addition of different nucleotides. If left unprotected, it will lead to the formation of a mixture of oligonucleotides. The 5-hydroxyl group is therefore blocked by adding acetic anhydride and N-methylimidazole (capping). After capping, the reaction column is thoroughly washed to remove extra acetic anhydride and N-methylimidazole. Step 4: Oxidation This step is basically an oxidation step. In this step, the phosphite linkage is oxidized to give more stable phosphate linkage. The oxidation is best done by adding a mixture of dilute aqueous iodine solution, pyridine (Py) and tetrahydorfuran (THF) to the reaction column. The steps one through four, i.e., deblocking, base condensation, capping and oxidation, are repeated until all desired bases have been added to the column. This cycle is completed once for each additional base. Step 5 Detachment of oligonucleotide from solid support After all bases have been added the oligonucletide must be cleaved from the solid support and deprotected before it can be effectively used. For detachment of oligonucleotides form resin, the column is treated with 28% ammonium hydroxide solution (NH4OH), and at the same time the ethylcyano group on the phosphate group is removed. Step 6: Purification and isolation of oligonucleotide In this step, NH4OH is evaporated from the ammonium hydroxide solution of oligonucleotides to get crude product. The crude product is a mixture of oligonucleotide, cleaved protective groups and oligonucleotides with internal deletions. Now this crude product is subjected to boiling in a sealed tube with NH4OH at 55à °C. The main purpose of this reaction is to remove the base protecting group. After evaporation of NH4OH, the crude product is subjected to desalting followed by Polyacrylamide Gel Electrophoresis, to purify the oligonucleotides. Desalting is used mainly to remove the ammonium ion. This is done by ethanol precipitation, size-exclusion chromatography, or reverse-phase chromatography. Oligonucleotides are synthesized by the stepwise addition of nucleoside-3à ¢Ã¢â ¬Ã ²-phosphoramidite monomers to solid-phase supports in an automated DNA synthesizer. In solid-phase synthesis, 3-terminal hydroxy group of the first added nucleoside is attached to the solid surface by covalent interaction. The solid support is contained in columns whose dimensions depend on the scale of synthesis. The two most frequently used solid phase materials are Control Pore Glass (CPG) and macroporous polystyrene (MPPS). CPG is commonly defined by its pore size, for example pore sizes of 500Ã⦠are used to allow the oligonucleotides preparation of about 50 -mer. To improve the performance of native CPG some modification is required. This is done by treating the material with (3-aminopropyl)triethoxysilane) to give Aminopropyl CPG. The amino group then serves as the anchoring point for the first added oligonucleoside. MPPS is synthesized by polymerization of divinylbenzene, styrene, and 4-chloromethylstyrene in the presence of a porogeneous agent. It is a low-swellable, highly cross-linked polystyrene and suitable for oligonucleotide synthesis. The macroporous chloromethyl MPPS obtained is often converted to aminomethyl MPPS to improve the efficiency of the support. Annealing of oligonucleotides For chemically synthesize a gene, the next step will be to assemble the oligonucleotides to form a complete gene. This is achieved by enzymatic methods which include polymerase cycling and ligase reactions. Some of the strategies are discussed below. Assembling oligonucleotides by single-step PCR. For synthesis of a gene, the oligonucleotides (about 30-60 nt long) are synthesized chemically so that each oligonucleotide has a 6-9 nt overlap with its neighboring oligonucleotide. These are then assembled in a single-step PCR. In this method, oligonucleotides are first ligated and then the product, the entire gene, is PCR amplified using the outmost oligonucleotides as primers. This method was first used to synthesize a 924-bp gene coding for an isozyme of horseradish peroxidase. Another method was developed by WPC Stemmer which did not use any ligase for joining the oligonucleotide products. It however, relied on Taq DNA polymerase (PCR cycling) for joining the individual oligonucleotides. Assembling oligonucleotides by two-step PCR. The method involves two steps. (i) Synthesis of individual fragments of the DNA of interest: ten to twelve 60mer oligonucleotides with 20 bp overlap are mixed and a PCR reaction is carried out with high-fidelity DNA polymerase Pfu to produce DNA fragments that are 500 bp in length. (ii) Synthesis of the entire sequence of the DNA of interest: five to ten PCR products from the first step are combined and used as the template for a second PCR reaction using high-fidelity DNA polymerase pyrobest, with the two outermost oligonucleotides as primers. Several modifications of the above procedure have been presented. One such method called PAS (PCR-based accurate synthesis) involves (i) synthesis of oligonucleotides to cover the entire DNA sequence (ii) PCR to synthesize DNA fragments (iii) second PCR for assembly of the products of the first PCR and (iv) cloning of the synthetic DNA and then verification by DNA sequencing. Besides, other methods in use for gene synthesis are successive extension PCR, simplified gene synthesis (PCR based), synthons and ligation by selection, to name a few. Review questions and problems What is the advantage of phosphatetriester method over phosphatediester method? What is the advantage of phosphitetriester method over phosphatetriester andà phosphatediester method? What is the main advantage to use DMTCl for protecting the 5-hydroxyl group? How could you attach the first nucleoside to the solid support? What is the utility of capping step in the oligonucleotides synthesis? Why capping is done by aceticanhydride? What is the function of iodine in the oxidation step of oligonucleotides synthesis? How could you protect only the free -NH2 group of the bases of a nucleoside? What is the reagent used for the removal of 2-cyanoethyl group from theà synthesized oligonucleotides? What is the byproduct produced from the base-condensation step of oligonucleotidesà synthesis in phosphite triester method? How could you deprotect the bases of oligonucleotides? What is the function of tetrazole in the base condensation step of oligonucleotide synthesis? What is the basic principle for synthesizing a gene from the corresponding oligonucleotides by (a) PCR-based one-step DNA synthesis, (b) PCR-based two-step DNA synthesis?
Wednesday, October 2, 2019
The Ambivalence Of Abortion :: essays research papers
The Ambivalence of Abortion Whether or not abortion is morally right or wrong, the fact remains that a woman has the right to make her own decisions. If a woman decides to have an abortion it is her right to do as she pleases with her body. It is understandable that many may disagree with abortion being legal, but that is no reason not to allow others to have a different opinion. Nevertheless, the question of whether abortion is morally right should be left up the conscience of the woman whom is making the decision and not through judging eyes not going through the same situation. There are more pros than cons to having an abortion. For instance, a woman with a family of four who are barely surviving discovers she is pregnant. She decides to have an abortion because she cant afford the baby. That might have saved the world of another sad story of a mother abusing and neglecting her unwanted child. Unfortunately, sometimes a mother can run the risk of death if they go through with the pregnancy. Would it be fair to let the mother of two young children die because SOME PEOPLE don't believe in abortion? On the other hand, it may be true that young women are taking advantage of the fact that they can easily have an abortion. Some say they are substituting birth control with abortion. Nevertheless, no one ever said we can't place restrictions on abortion but we can't let one bad apple spoil the whole bunch. The fact remains that although some might take advantage of the situation, it is unconstitutional to deny the opportunity to someone who REALLY has no other alternative but abortion. Every woman (and person) has the right to make their own decisions. No one has the right to deny another of their own opinion. Some may not believe in or agree with abortion and that's perfectly fine but it does not give them the right to deny others of the option. Finally, a woman has the right to decide whether or not to have an abortion and whether or not to feel guilty
Drinking Alcohol and Driving :: Exploratory Essays, Drunk Driving
Alcohol and Driving Imagine being in a bar with a few of your good friends. Everyone is drinking and having a good time. Your are going to leave and go home, but you friends won't let you because they know the dangers of driving after having a few drinks. Instead they ca ll a cab to give you a ride home. You would be extremely lucky to have such smart friends. Drunk driving is a very serious problem in our society today, but it is becomming socially unacceptable causing the numbers of alcohol related traffic fatalites t o decline considerably. Drunk driving can be very deadly. Yet many people drive while under the influence everyday. Drivers who are drunk are blamed for the loss of as many as twentyfive thousand lives in highway crashes each year and hundreds of thousands of severe injurys. It is thought that drunk drivers have a long history of doing this and many prior arrests. In addition, most of those killed are just innocent victims whose behavior did not contibute to their deaths. These last two statements are both false. On aver age a drunk driver that kills has never been involved in a alcohol related accident before and have no proir convictions for drunk driving. The part about the people killed are just innocent bistanders is overaggerated also. Most of the drunk drivers v ictims are the drivers themselves, their often passengers, and the drunken pedestrains and cyclists. Despite this drunk driving is still very dangerous. It is the leading cause of unintentional injury deaths in America today. In fact it is said that ab out 40 % of the population will be involved in a alcohol related crash during their life. Drunk driving is especially dangerous to young people, who seem to be more involved than others. Drunk driving is the number one cause of death among y oung people, accounting for 20% of all deaths from ages 15 to 20. Drunk driving is such a hard thing to overcome though. In our society alcolol is overwhelmingly accepted as a facilitator of sociable interaction, and the great majority of adults drink. But steps a re being taken and the numbers of deaths are declining. Alcohol-related traffic fatalities have been decreasing lately. As a proportion of all traffic fatalities it has been decreased since 1982. In fact since 1982 the number of alcohol releated traffic fatalities has decreased 30%, from 25,165 to 17,699, w hile alcohol-related traffic fatalitites, as a proportion of all traffic fatalities, decreased from 57% to 45%.
Tuesday, October 1, 2019
Group Dynamics in Twelve Angry Men
The movie ââ¬Å"12 Angry Menâ⬠is a fascinating and insightful examination of a diverse group of twelve jurors who are uncomfortably brought together to deliberate the ââ¬Å"factsâ⬠of a seemingly open-and-shut murder trial. The premise is the trial of a frightened, teenaged defendant accused of stabbing and killing his father. However, there is an underlying sense that the jurors, themselves, and the American judicial system, are on trial as well. The trial by jury system is supposed to produce a unanimous decision in an objective, fair and unbiased manner. This film takes more than a glimpse behind the closed doors of a jury room and reveals that itâ⬠s anything but what we would expect. So, what went wrong? In order to answer that question, we must examine the twelve jurors and their personalities, their ability ââ¬â and often inability ââ¬â to communicate clearly, and the positive and negative aspects of their conflict management processes. The jurors are a group of predominately middle-aged white males. Thatâ⬠s about where the similarities end. Their personalities, prejudices, weaknesses, socio-economic and cultural differences, priorities, ignorance, and fears often cause them to avoid the true issues of the case. The foreman of the jury (Juror #1) is an assistant high school football coach but lacks any natural leadership skills. Throughout the proceedings, he tries to keep the proceedings formal but is easily frustrated and sensitive when his ââ¬Å"authorityâ⬠or control is threatened. Juror #2 is a meek and mild bank teller who seems to try to avoid conflict at all costs. Juror #3 runs a messenger service and is a rude bully. He is extremely opinionated and biased, loud-mouthed, intolerant and temperamental. Although defiant to the end, itâ⬠s later discovered that his own personal conflicts greatly influence his behavior. Juror #4 is a stockbroker. Heâ⬠s very logical, self-assured, and rational. Itâ⬠s apparent early in the movie that he has an amazing recall about the evidence introduced in the case and has kept meticulous notes. Juror #5 is a reserved and quiet man. He is apparently ashamed of his slum-dwelling upbringing and hesitant at first to speak up. Itâ⬠s possible that he has a Hispanic heritage, but this is only speculation. Juror #6 is a blue-collar painter. A natural follower, he seems to have difficulty in making his own decisions. Heâ⬠s intolerant of disrespect towards the older juror. Juror #7 is a salesman whose main interest is getting to a baseball game that he has tickets for. He lacks any compassion or concern for the defendantâ⬠s life. Juror #8 is a patient and thoughtful architect. A natural leader, he often persuades others through his calm logical reasoning. He is focused on the gravity of the case and is able to separate others personal prejudices from the task at hand. Juror #9 is the eldest man in the group. Heâ⬠s at the twilight of his life and has uncanny powers of observation and perception. Juror #10 is an intolerant, racist, and angry man. He uses no logical reasoning skills and tries to force his emotional and bitter opinions on others. Juror #11 is a recent immigrant to the United States. He is well spoken and has a much deeper respect for the American judicial system than the rest of the group. He is polite and occasionally clever, but also resolute and open-minded. Juror #12 is a superficial advertising man. He seemingly lacks any real convictions about anything as evidenced by his constant swaying to others opinions. These men all have obvious strengths and weaknesses. And, they each have their different and unique individual life experiences and attitudes. But itâ⬠s precisely those differences that affect how they are able to interact with each other (although often ineffectively) to work through the task thatâ⬠s been given to them. Further, the only way to convey those differences, those things that are important or unimportant to them, is through communication. As is often the case, how we communicate with others determines the results that we achieve. If we communicate effectively, others can easily grasp our ideas and intentions. If, however, we utilize poor communications skills, our true objectives become confusing, misinterpreted, or lost altogether. Twelve Angry Men gives excellent examples of both clear, concise, and reasonable communication skills as well as inadequate, appalling, and exasperating ones. Henry Fonda (Juror #8) was far and away the most effective communicator of this group. Perhaps this is why he was able to eventually achieve the unlikely feat of swaying the other eleven jurors. After the initial vote was taken, the emotionally charged group immediately became insolent. Fonda was able to not only convey his intentions of not emotionally pre-judging the young defendant, but did so in such a way that was not directly confrontational. He openly admits that he doesnâ⬠t necessarily believe the boys story, but tries to refocus the group towards the legal standards set forth by the judge. He suggests that the group spend just one hour discussing the case and weighing the facts, rather than sending the boy off to die without at least some thought. Throughout the movie Fonda is able to argue and counter-argue his doubts with a rational, thoughtful cool-headedness that made it difficult for the other jurors to deny. Juror #4 (E. G. Marshall) was also an effective communicator. His arguments for guilt were clear, concise, and matter-of-fact. However, he often presented arguments in a smug, conceited manner. I think it was only Fondaâ⬠s appeal to his logical side that eventually won Juror #4 over. On the other side of the coin, it was the total lack of communication skills that seriously hampered the arguments of Juror #â⬠s 3 and 10. Juror #3 (Lee J. Cobb) was abrasive and blustery. He was a bully in the worst sense of the word. He had no rational arguments of his own, and tried to use others as a springboard for his emotional personal attacks. He obviously felt very strongly about the boys guilt, (albeit for the wrong reasons), but was never able to forward any coherent reasoning to express that. Instead he used insults, assaults and threats to make up for his lack of coherent discussion. Juror #10 was just plain offensive. He was not capable of issuing any arguments, only violent outbursts of ignorant prejudice. It was precisely these types of communication and personality types that served to most influence the groupâ⬠s dynamics throughout the movie. Even though the initial vote was 11-1 for guilty, it can be contended that the group was possibly more divided. Six of the jurors, (Juror #â⬠s 1, 3, 4, 7, 10, and 12), raised their hands for a guilty verdict almost immediately. Yet, five of the remaining six (Juror #â⬠s 2, 5, 6, 11, and 9) were initially hesitant with their vote. They raised their hands only after seeing how quickly the others raised theirs. This is what Forsyth (1999) probably would have called compliance, ââ¬Å"Compliance occurs when group members privately disagree with the group, but publicly express an opinion that matches the opinions expressed by the majority of the groupâ⬠(179). This assumption could be reinforced by the order in which the jurors changed their votes. The five jurors originally hesitant were the first ones to switch their votes to not guilty as the meeting progressed. The foremanâ⬠s inability to lead effectively was another major component of the groupâ⬠s dynamics in this case. Juror #1â⬠³s deficiency caused the group to be more responsive to Juror #8â⬠³s natural leadership skills. The acceptance of Juror #8â⬠³s leadership facilitated the unlikely transition of the group from a guilty verdict to one of not guilty. Forsyth (1999) explains, ââ¬Å"In general, the greater the perceived competency and group-centered motivation of the individual, the more influential the minorityâ⬠(185). Juror #8 gained idiosyncrasy credits with the group as the meeting progressed and slowly developed his credibility. ââ¬Å"These credits accumulate during the course of interaction, typically as a member contributes to the progress of the group toward desired goalsâ⬠(Forsyth, 1999, p. 186). Twelve Angry Men is a movie about conflict and conflict resolution. When Juror #8 raises his hand to cast the only not guilty vote he throws the group into conflict. But, it is this same conflict that enables the group to intelligently complete their task. According to Forsyth (1999), ââ¬Å"Exposure to othersâ⬠positions, in addition to providing additional information and prompting a more thorough analysis of that information, can also cause group members to reinterpret, or cognitively restructure, key aspects of the issueâ⬠(191). After the initial vote, tempers flared, votes changed, divisions were created, emotions were exhibited, and prejudices were displayed. Throughout the rest of the movie though, the group, perhaps unconsciously, moved towards conflict resolution. Persuasion gives way to arguing, emotions take place of logic, and the once unified group splits into factions and coalitions. This period of conflict escalation is, in most cases, followed by a reduction in conflict and, ideally, conflict resolutionâ⬠(Forsyth, 1999, p. 237). ââ¬Å"Insofar as conflict is resolved successfully, it has stabilizing functions and becomes an integrating component of the group relationshipâ⬠(Forsyth, 1999), p. 263). These twelve jurors began with conflict, proceeded through often-heated conflict escalation, and eventually came to resolution. They may not have bonded emotionally together, but they were able to produce the best results with the tools they were given. It canâ⬠t be said for sure if the experience would have changed their attitudes permanently, but it is unlikely. However, it is hoped that those of us who view the film will not be so quick to judge after seeing the ââ¬Å"factsâ⬠in our own situations. To convict the young man based on their prejudices, emotions, or apathy would have been a travesty of justice. But, with group observation, discussion, and logical reasoning, (even if forced by conflict), we can all make better decisions.
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