LC-MS测定豆芽中的无根豆芽素的应用

超高效液相色谱仪LC-30A和三重四极杆质谱仪LCMS-8050联用快速准确测定豆芽中无根豆芽素的分析方法。样品经适当样品前处理后,用超高效液相色谱分离,三重四极杆质谱仪进行定性定量分析。结果表明:无根豆芽素在0.50~50.00 ng/mL浓度范围内线性良好,相关系数为0.999,仪器检出限为0.01 ng/mL,定量限为0.04 ng/mL。实际样品加标不同浓度所得回收率范围为100.10%~112.20%,精密度RSD%范围为3.22%~6.53%。     

Estimation of traffic density from drone-based delivery in very low level urban airspace

Driven by rising consumer demand, interest is growing in the application of autonomous unmanned aerial vehicles (drones) for the last-mile delivery of small express packages and fast-food meals in cities. To be realised, this would require the Very Low Level (VLL) urban airspace to be able to cope with high traffic densities of commercial delivery drones. The potential benefits of such novel drone-based applications are a reduction of traffic congestion in cities, lower greenhouse gas emissions and more efficient transportation operations. To help realise this concept, programs such as U-Space, the unmanned traffic management system for Europe, are developing important services such as deconfliction management and dynamic capacity management. However, for several of these services, design choices will depend on how, and how extensive they will be used. It therefore becomes important to estimate how many delivery drones would operate in a typical city. This paper aims to provide an estimate by establishing a framework to determine the traffic demand for express drone-based package delivery of five European countries. In addition, a detailed case-study is presented for determining traffic density of express package drone delivery for Paris metropolitan area in order to assess the feasibility from a user's perspective. The paper also discusses the potential of fast-food meal delivery drones compared to traditional delivery modes for Paris. Results suggest that hourly traffic densities culminating from express package and fast-food meal delivery drones will exceed today's global commercial aircraft traffic of 10,000 per day by more than six-fold for just one potential metropolitan city.     

National food security assessment through the analysis of food consumption data from Household Consumption and Expenditure Surveys: The case of Brazil’s Pesquisa de Orçamento Familiares 2008/09

By analyzing the food consumption data from the 2008/09 Pesquisa de Orçamentos Familiares in Brazil, we demonstrate that failing to account for food consumed for free at school may significantly distort the assessment of the distribution of food consumption among households and therefore the assessment of the extent of food insecurity in the country. The results of our analysis enabled a revision of the FAO estimate of the Prevalence of Undernourishment in Brazil and provide useful suggestions for better design of food consumption modules to be included in Household Consumption and Expenditure Surveys (HCES). Additionally, we identify areas for further research on food consumption data to improve national food security assessments.     

豆渣馒头的研制及营养分析

豆渣是加工豆腐豆乳等豆制品的副产品,豆渣中除含丰富的膳食纤维外,还富含蛋白质、脂肪、钙、磷、铁、维生素等,具有很好的营养价值,是一个尚未充分利用的宝贵资源。该研究将豆渣添加到面粉中,采用二次发酵工艺,将感官评分和营养成分分析评分综合,采用正交试验设计,得出豆渣馒头的最佳配方为：面粉为90g,豆渣为10g,酵母为0.6g。     

Application of Telemarketing in University Foodservices

Abstract

One of the downsides of university foodservice operations is that non-mandated students are less likely to participate in the meal plan program. This paper discusses the development and use of telemarketing as a means of increasing student participation in non-mandated meal plans. Three goals were established for the telemarketing program: Increase revenues; define student participation factors; and generate goodwill. An analysis of revenues and costs attributed to the program showed that telemarketing was an effective means of increasing sales and generating profits.     

Predicting congregate meal program participation: Applying the extended theory of planned behavior

Authorized under Title III-C of Older Americans Act, congregate meal programs provides individuals 60 years of age and older nutritious meals in senior centers. Declining participation in recent years underscores the need to understand factors that affects participation. This study applies the Theory of Planned Behavior (TPB) to explain the intention of community-dwelling older adults to participate in congregate meal programs. One additional variable, past behavior, was added to increase the prediction power of participation intention. A total of 238 participant surveys were collected and analyzed. Seven hypotheses were tested using structural equation modeling. The data fits the TPB model well. All predictor variables (attitude, subjective norm, perceived behavior control and past behavior) had a significant positive effect on participation intention. Perceived behavior control (PBC) had the greatest prediction power on intention. Based on the research findings suggestions were made to increase congregate meal program participation.     

Congregate meal sites participants: Can they manage their diets?

Many individuals attending congregate meal sites have chronic conditions that can be impacted by their diet. This study found that congregate meal site participants visit meal sites primarily for social purposes but consume meals while they satisfy their social agenda. Also, individuals that suffer from diabetes, cancer, and heart disease were not aware of what foods were beneficial in prevention and/or maintenance. Specifically, individuals with diabetes, cancer, and heart disease were not able to determine any better than those without those conditions which food types were recommended by nutrition experts, nor which food types were more beneficial in the maintenance or prevention of their conditions.     

我国鱼粉市场需求的影响因素及对策分析

文章以鱼粉、工业饲料以及养殖业等统计数据为依据,分析了我国鱼粉消费量居高不下的原因和消费特征,发现下游无论是饲料生产企业还是终端养殖(户)企业都存在严重的鱼粉低效率使用问题,同时我们发现鱼粉消费特征与我国养殖业特征存在一致性。当前,面对如何解决我国鱼粉市场需求增长过快造成的供不应求问题,宏观层面,政府部门需加强对渔业捕捞和海洋环境保护的规范管理,同时制定正确引导养殖业发展的政策,以及尽早建立鱼粉配方衡量指标的标准化体系;微观层面,处于鱼粉行业产业链中从生产到最终消费每一环节的参与者都需要更加理性地对待采购和使用。     

陕南巴山地区食用豆类资源考察与鉴定

1992～ 1 995年对陕南巴山地区食用豆资源进行了考察与鉴定。采集各种豆类 2 50余份 ,对其中 2 0 0份材料进行了田间种植鉴定 ,就其分布区域栽培状况主要性状特征进行了初步研究 ,发现了可供利用的优良种质。