我国食品微生物检验方法标准现况及对策研究

本文概述了我国食品微生物检验方法标准的现况,分析了2013年食品标准清理工作中,微生物检验方法标准存在的问题。清理专家技术组对我国现行的163项微生物检验方法标准进行逐项审议后,提出了明确的清理意见,最终提出了拟形成的GB 4789食品微生物检验方法标准,共31项。在总结、分析标准清理工作的基础上,探讨了现行标准存在的问题和解决问题的思路,为监管部门和相关行业人员更好的理解和执行食品安全国家标准,为进一步完成标准整合工作、完善标准体系的构建,提供了解决方案。     

世界各国的乳品微生物检验

本文从微生物检验项目、采样方法、微生物检验要求等角度,比较分析了世界各国法规及标准中的乳品微生物检验规定,总结了世界各国的乳品微生物检验要求及特点,以及对我国制订乳品微生物限量标准的借鉴意义.     

食品安全标准中微生物检验指标的问题分析及建议

微生物源污染是食源性疾病爆发事件中最主要的原因,科学设置食品安全标准体系中微生物指标及其限量对预防微生物源食源性疾病的爆发具有重要的意义。本文根据我国食品安全标准体系,将现行有效的食品标准中微生物检验指标总结归纳为"卫生指标菌""致病菌""商业无菌""病毒""抗菌指标"5个类别,分析了标准体系中指标设置、限量值规定、方法更新和标准应用方面的问题与不足,并提出了合理建议,以期为国家食品安全标准体系的修订提供参考。     

关于《化妆品卫生规范(2007年版)》微生物检验方法改进的探讨

《化妆品卫生规范(2007版)》第四部分微生物检验方法对操作步骤作了具体规定,但在实际工作中还存在着许多复杂因素,忽视这些因素可能给检验结果带来偏差甚至错误。结合多年的化妆品微生物检验经验,对化妆品微生物污染的种类及危害,检验方法和采样方案的完善,取样方法的补充、增加空白对照、选择合适的培养基、改进检验结果报告方式等方面进行探讨,以提高检验结果的准确性。     

世界各国的乳品微生物检验

从微生物检验项目、采样方法、微生物检验要求等角度，分析了世界各国法规及标准中的乳品微生物检验规定。总结了世界各国的乳品微生物检验要求及特点，以及对我国制订乳品微生物限量标准的借鉴意义。     

世界各国的乳品微生物检验

本文从微生物检验项目、采样方法、微生物检验要求等角度，比较分析了世界各国法规及标准中的乳品微生物检验规定，总结了世界各国的乳品微生物检验要求及特点，以及对我国制订乳品微生物限量标准的借鉴意义。     

痘克乳膏微生物检查方法验证

目的验证痘克乳膏微生物检验方法,保证检验方法的合理性和结果真实性。方法参照《中国药典》2010年版二部微生物限度检查法(附录ⅪJ),采用常规法和培养基稀释法验证。结果培养基稀释法可消除痘克乳膏的抑菌活性。结论化妆品微生物检验方法也需进行验证。     

食品微生物检验的问题及解决措施探讨

在食品安全领域中,微生物检验的实施发挥了重要的作用.为了加强检验的可靠性,应对检验工作进行全面优化.通过对食品微生物检验的基本内容和主要方法的明确,分析食品微生物检验中存在的问题,提出加强食品微生物检验准确性的措施,可使微生物检验工作更加规范有效,为食品安全生产提供相应的参考内容,进而提升检验工作的质量,促进食品安全发...     

中国食品药品检定研究院

正食品化妆品检定所是中国食品药品检定研究院的一个专门从事食品、保健食品和化妆品检定业务所。2009年7月22日,国家食品药品监督管理局正式批复在中国药品生物制品检定所(现中国食品药品检定研究院)设立食品化妆品检验检测中心,为国家食品药品监督管理局食品、保健食品和化妆品监管提供强有力的技术支撑。2011年9月,国家食品药品监督管理局再度批准食品化妆品检验监测中心更名为食品化妆品检定所。网站:http://www.nicpbp.org.cn/CL0001/业务咨询:010-67095114     

食品微生物检验内容及检测技术

影响食品安全因素众多,微生物污染造成的食源性疾病仍是世界食品安全中最突出的问题.为了更好地开展食品微生物检验和调查研究工作,提高食品的卫生质量,保证消费者饮食安全,对微生物的检验内容以及检验新技术的研究动向进行了详细的介绍.并通过对食品微生物检验新方法的分析总结,展望了食品微生物检验技术将向仪器化、自动化、标准化、定量化的趋势发展.     

Methodology for design of suitable dishes for dysphagic people

A methodology to adapt dishes for cerebral palsy (CP) dysphagic people was developed. Five conventional dishes were cooked, blended and texturized with mixtures of thickeners and gelling agents based on xanthan gum. The most appropriate texturizing agents were selected, the textural thermostability of the dishes was studied, and the shelf-life was evaluated by back extrusion, sensory and microbiology analysis. Information about the acceptability of the adapted dishes by CP dysphagic people was obtained through the control of the consumed fraction and the liking or disliking reaction after eating the dishes. The adapted dishes considered suitable for swallowing process showed maximum force between 6.2(0.1) N and 18.9(3.3) N, minimum force between −3.9(0.3) N and −9.2(1.3) N, and F_min/F_max ratio between 0.4(0.0) and 0.7(0.0). Regarding sensory characteristics, the adapted dishes showed low stickiness, residue and firmness, and high suitable texture score. The methodology was appropriate for developing suitable dishes, sensorially accepted by dysphagic people, thermostable for 7 days refrigerated storage and ready-to-eat.Industrial relevanceThis study presents the technological basis for the standardized design of suitable ready-to-eat dishes for dysphagic people. The methodology developed is of great interest to the industry of ready-to-eat dishes.     

游戏机手柄上盖注射模设计

文章分析了游戏机手柄上盖塑料件的工艺特点,介绍了游戏机手柄上盖注射模结构设计和工作过程。该模具采用浇口开设在顶杆上,在分型时实现自动拉断凝料,同时将曲面分型改为平面分型,降低模具加工的难度,节约成本和提高注塑、脱模的稳定性。生产实践证明,该套模具结构合理,运行可靠。     

Computation method for optimization of recipes for protein content

The authors propose a calculated protein utilization coefficient. This coefficient considers the difference between the utilization rates of the proteins being contained in the mixture and their amino-acid composition. The proposed formula allows calculations by computer. The data obtained show high correlations with the results received by biological tests with Tetrahymena cultures.     

Comparison of Iterative Procedures for Solving Equations for Sire Evaluation

Gauss-Seidel, successive overrelaxation, end-of-round relaxation, and block iteration methods of obtaining solutions for sire effects from equations rising from progeny with records in mixed model procedures were compared. Equations transformed to provide direct solutions for genetic group plus sire effects as well as constrained and unconstrained equations were compared also. Equations for milk yield for the Northeast Artificial Insemination Sire Comparison numbered 301 for Ayrshires, 325 for Brown Swiss, 6,010 for Holsteins, and 926 for Jerseys after absorption of herd-year-season effects. Numbers of coefficients were 15 to 20% less for transformed equations, which decreased computing time per round of interation about 15%. Solutions for transformed equations converged more rapidly than solutions for untransformed equations with convergence criterion the ratio of the residual norm to the norm of the right-hand sides. Successive overrelaxation generally was more efficient than Gauss-Seidel iteraton. Solutions for equations constrained to full rank converged more slowly than unconstrained equations. Block iteration was more efficient than single equation iteration.     

圆形钢丝断面收缩率的快速计算法

按照ＧＢ２２８—８７《金属拉力试验法》中的公式计算断面收缩率既费时又复杂。在对原公式作进一步推导之后得出一新的计算式，按此公式可快速、难确地计算出值。     

大豆热风烘干机的设计计算

大豆脱皮对提高大豆油质量及豆粕蛋白含量至关重要.作为大豆脱皮中的关键设备,烘干机的设计质量对脱皮效果影响很大.以50 t/d大豆烘干机为例,介绍了大豆烘干过程中的物料衡算、热能衡算等计算方法和参数的选取,对实际应用具有一定指导作用.     

Screening of industrial enzymes for deproteinization of shrimp head for chitin recovery

Food grade proteolytic enzymes were examined for deproteinization of shrimp head. Shrimp head was easily deproteinized by Alcalase ® and trypsin at a pH of 8.0. Alcalase was chosen as the most efficient commercial enzyme for deproteinization of shrimp head. Alcalase treatment of shrimp head recorded 61% of weight loss on dry basis and a residual protein of 275 mg/g dried shrimp head. The enzymatically deproteinized shrimp head was later demineralized with lactic acid using microwave radiation at 400W. The combination of enzymatic and physicochemical treatments promoted the chitin recovery from dried shrimp head under eco-friendly conditions.     

FTA滤膜用于PCR检测单核细胞增生李斯特氏菌的研究

建立单核细胞增生李斯特氏菌(Listeria moncytones,LM)快速、敏感、特异的PCR检测方法.利用FTA滤膜提取模板DNA,采用PCR特异性扩增单增李斯特菌的溶血素基因(HIyA),并评价该方法的特异性与灵敏性.引物能特异性的扩增单增李斯特的HIyA基因,而其他细菌的扩增结果均呈现阴性:利用FTA滤膜提取模板直接检测单增李斯特具有较高的灵敏度,灵敏度为l 02 cfu/mL.利用FFA滤膜提取模板,操作简便,成本低且具有较高的灵敏度,为食品中单核细胞增生李斯特氏菌的快速检测提供新的手段.