气相色谱法检测掺假植物油方法研究

目的:建立掺假植物油的气相色谱检测方法。方法:将油脂样品用0.5 mol/L的KOH-CH3OH溶液甲酯化后用石油醚苯混合溶液提取,通过气相色谱检测分析样品的脂肪酸构成比,并根据不同油种其脂肪酸的特征组分和含量以及其特征组分的绝对量的不同来鉴别食用植物油的掺伪。结果:能有效鉴别植物油掺假比例。结论:方法简便、可靠、实用。     

粪便无害化处理及处理粪便用于蔬菜施肥的卫生学评价

「目的」探讨改进后双瓮漏斗式厕所粪便无害化处理效果及处理后粪便作为肥对土壤和蔬菜的生物性污染的影响。「方法」对处理区和对照区进行了粪便细菌及寄生虫卵检测和人群流行病学调查。「结果」处理后粪液粪大肠菌值〉１０＾－４,寄生虫卵沉降率为９５．０％,和对照区相比,处理区土壤粪大肠菌和蛔虫卵污染程度分别下降了５７．１％和３８．９％,蔬菜中的粪大肠菌和蛔虫卵污染程度分别下降５０．９％和８１．８％;处理区和对照     

云南省白族长寿区蔬菜中19种元素含量分析

用电感偶合等离子体发射光谱法 ( ICP- AES) ,对云南省白族长寿区的 4种蔬菜进行了 1 9种元素的测定分析。结果表明 ,在 4种蔬菜中 ,均含有人体必需的 Ca、Mg、P、S、Na5种常量元素及 Cr、Mn、Zn、Fe、Sr5种微量元素 ,且 Ca、Mg、P、S、Zn、Fe的含量较高。这 1 0种人体必需元素在4种蔬菜中的含量有明显差异 ,以辣椒为最低。蔬菜中这一优越的微量元素谱是该地区人能健康长寿的重要原因。     

A communication inequalities approach to disparities in fruit and vegetable consumption: Findings from a national survey with U.S. adults

ObjectivesThis study assessed whether socioeconomic disparities in fruit and vegetable consumption and its differences by social capital are accounted for by exposure to media information about fruits and vegetables and reflective integration of that information.MethodsOnline survey data were collected in July 2014 from 572 U.S. adults from a nationally representative online panel. Path analysis was employed to test our models.ResultsEducation and social capital were positively associated with media exposure, which was in turn positively related to reflective integration and finally led to fruit and vegetable consumption. Education and income were positively associated with social capital.ConclusionDifferences in fruit and vegetable consumption across social groups are at least partly explained by exposure to information about fruits and vegetables from the media, and by reflective integration of that information.Practice ImplicationsHealthcare professionals and health educators should create health messages delivered via the media that are easy to understand with an appropriate level of health literacy. Also, health interventions that aim to build social capital may promote health media use and its reasoning processes, thereby reducing communication inequalities by SES as well as disparities in fruit and vegetable consumption.     

Higher vegetable consumption is related to a lower risk of cardiometabolic risk cluster among children and adolescents: A national cross-sectional study in China

Background and aimsEvidence about the association between vegetable consumption and cardiometabolic risk factors (CMRFs) cluster among children and adolescents was inconsistent. We aimed to investigate the prevalence of CMRFs and CMRFs cluster, and to evaluate their associations with vegetable consumption.Methods and resultsA total of 14,061 participants aged 6–19 years were recruited from 7 provinces of China. A standard physical examination, including height, weight and blood pressure, was conducted. Information regarding CMRFs was obtained through anthropometric measurements and blood sample testing, while weekly frequency and daily servings of vegetable consumption data collected by questionnaires. Logistic regression models were used to analyze the odds ratios (OR) for associations between CMRFs, CMRFs cluster and vegetable consumption. The prevalence of no CMRFs cluster among children and adolescents was 26.4%. Participants whose daily vegetable consumption was 0.75–1.5 and ≥1.5 servings showed a lower risk of high blood pressure (HBP), high total cholesterol (TC), high triglyceride (TG), and high low-density lipoprotein cholesterol (LDL-C) compared to those with daily vegetable consumption of <0.75 servings. Besides, higher average daily vegetable consumption was strongly associated with lower risks of CMRFs cluster. Stratified analyses showed that the protective effects of more vegetable intake on CMRFs cluster were profounder in boys and young adolescents.ConclusionMore vegetable intake was associated with lower risks of CMRFs cluster in Chinese children and adolescents aged 6–19 years, which further highlighted the significance of vegetable consumption to improve the cardiometabolic risk status.