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色谱技术、光谱分析法和生物检测技术在 食品安全检测方面的应用进展 总被引:1,自引:0,他引:1
食品安全是一项关系到全人类健康和全球经济的重要公共卫生问题。但近年来,我国食品安全问题层出不穷,因此,食品安全检测技术逐渐成为了当前社会关注的焦点。本文综述了当今常用的食品安全检测和监测技术,分别介绍了色谱技术、光谱分析法、生物检测技术3种主要检测技术在食品安全检测应用方面的研究进展,并详细总结了3种主要检测技术的主流检测方法,对其检测原理、操作步骤及各自的优缺点进行了比较分析。最后,总结了现阶段食品安全检测方法的不足与发展方向,对食品安全检测技术的发展具有现实意义和指导作用。 相似文献
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本文从食品安全的角度出发,介绍了几种快速检测方法,同时,较系统的介绍了利用生物化学、免疫学和分子生物学的技术手段快速检测病原菌的技术和方法。 相似文献
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浅谈燃料乙醇生产技术进展 总被引:4,自引:1,他引:4
简述了燃料乙醇-作为一种可再生能源,它可减少环境的污染,被称为“清洁燃料”及它在国外的使用情况;并重点介绍了燃料乙醇的几种生产技术方法。 相似文献
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论述了对电力工程中常用曲线进行解析化的必要性,提出了满足电力工程实际需要的曲线解析化的方法,给出了电力工程设计中常用的2种曲线的解析表达式。 相似文献
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因子分析确定不纯色谱峰的物种数 总被引:1,自引:1,他引:0
用因子分析法确定了在高效液相色谱分析测定载热油中联苯及联苯醚含量时,由于柱效严重降低而导致的不纯色谱峰中的吸光物种数,处理结果与采用良好色谱条件时结果相符。 相似文献
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本文分析了产生纺丝上油不匀、油剂腐败的原因及对POY、DTY加工带来的影响,并提出了控制上油不匀、腐败、上油率的具体措施,指出必须高度重视油剂工序的管理。 相似文献
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Agglomeration or “grittiness” is detrimental to bakers' yeast quality. Gritty yeast only partially resuspends when mixed in water, most of it remaining as macroscopic cell aggregates. A macroscopic sedimentation test was developed for measuring agglomeration intensity. Expression of the gritty phenotype was investigated in two strains (N176 and GB1) of Saccharomyces cerevisiae grown on a 14-liter scale by varying fermentation conditions of agitation and aeration. Results show that yeast agglomeration is different from yeast flocculation, and is determined by both strain genetic background and environmental factors. The gritty phenotype was expressed in the strain prone to agglomeration (N176) when dissolved oxygen was limiting in the fermenter. Gritty cells had a lower phosphorus and lipid concentration and a higher protein concentration at the surface of the cell, and a higher amount of whole cell and cell wall proteins and calcium than non-gritty cells. Some proteins were also extracted from gritty cells with sodium hydroxide or mercaptoethanol, that were not present in non-gritty cells. Agglomeration did not result in major differences in the structure or composition of the structural cell wall mannoprotein (CWMP). A model for agglomeration is proposed: proteins (cognors) activated by Ca2+ (cofactors) to increase their binding capacity bind the mannans (cognons) of adjoining cells; binding is facilitated by the lower phosphorus and lipid concentration at the surface of gritty cells. 相似文献