Food Insecurity,Neighborhood Food Access,and Food Assistance in Philadelphia

An estimated 17.6 million American households were food insecure in 2012, meaning they were unable to obtain enough food for an active and healthy life. Programs to augment local access to healthy foods are increasingly widespread, with unclear effects on food security. At the same time, the US government has recently enacted major cuts to federal food assistance programs. In this study, we examined the association between food insecurity (skipping or reducing meal size because of budget), neighborhood food access (self-reported access to fruits and vegetables and quality of grocery stores), and receipt of food assistance using the 2008, 2010, and 2012 waves of the Southeastern Pennsylvania Household Health Survey. Of 11,599 respondents, 16.7 % reported food insecurity; 79.4 % of the food insecure found it easy or very easy to find fruits and vegetables, and 60.6 % reported excellent or good quality neighborhood grocery stores. In our regression models adjusting for individual- and neighborhood-level covariates, compared to those who reported very difficult access to fruits and vegetables, those who reported difficult, easy or very easy access were less likely to report food insecurity (OR 0.62: 95 % CI 0.43–0.90, 0.33: 95 % CI 0.23–0.47, and 0.28: 95 % CI 0.20–0.40). Compared to those who reported poor stores, those who reported fair, good, and excellent quality stores were also less likely to report food insecurity (OR 0.81: 95 % CI 0.60–1.08, 0.58: 95 % CI 0.43–0.78, and 0.43: 95 % CI 0.31–0.59). Compared to individuals not receiving food assistance, those receiving Supplemental Nutrition Assistance Program (SNAP) benefits were significantly more likely to be food insecure (OR 1.36: 95 % CI 1.11–1.67), while those receiving benefits from the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) (OR 1.17: 95 % CI 0.77–1.78) and those receiving both SNAP and WIC (OR 0.84: 95 % CI 0.61–1.17) did not have significantly different odds of food insecurity. In conclusion, better neighborhood food access is associated with lower risk of food insecurity. However, most food insecure individuals reported good access. Improving diet in communities with high rates of food insecurity likely requires not only improved access but also greater affordability.     

时尚饮食一族大聚会专家过来插插嘴

“我最爱吃炸薯条了,虽然身体渐渐发胖,但是还是不能抑制自己啊！” “我是爱喝茶的,怎么也离不开它,我还很讲究呢,非新茶不喝。” “呵呵,我爱喝咖啡,所以希望大家都喝咖啡。” “烧烤多棒啊,大家一起吧。” “我身体不好,要天天吃保健品,不吃不行呀。” “我们就是时尚饮食一族,我们有我们的饮食主义。” “这人谁呀?” “说是专家。” “听他说什么。”……     

Food reinforcement

The reinforcing value of food, measured by how hard someone is willing to work to obtain food, is influenced by food palatability, food deprivation and food variety, and may be a more powerful determinant of food intake than hedonics or liking. The reinforcing value of food is mediated in part by dopaminergic activity. Genotypes that influence dopamine transport and the density of dopamine D2 receptors interact with food reinforcement to influence eating behavior, and D2 receptor genotypes may influence food reinforcement and weight gain after smoking cessation. Inhibition of dopamine transport increases brain dopamine concentrations, which may influence weight gain after smoking cessation and can reduce energy intake in obese adults.     

Food allergy

Food allergies' following food incompatibilities, which are not caused immunologically. Mostly allergic symptoms are caused by cow's milk or chicken eggs. Allergic reactions are preceded by sensitizing events; certain characteristics of foodstuffs and conditions in the human body facilitate their development. Gastrointestinal symptoms very often are just accompanying signs. In differential diagnosis the so-called "pseudo-allergies' following food ingestion have to be separated. Most important diagnostic measures are clinical history, prick-/scratch test, RAST, gastrointestinal provocation and abstinence test. The therapeutic program consists of allergen abstinence, avoiding all allergy-arousing factors, oral desensitizing and pharmaceutical treatment.     

食品及食品包装品的无菌检验

鉴于我国尚未有食品及食品包装品的无菌检验标准,为了促进无菌检验领域技术的提高与推广进行了本方法研究。在参照商业无菌检验方法基础上,综合多方面的鉴定技术、参比全自动微生物鉴定系统方法完成的。