手机使用最怕什么

到菜市场买菜，大多数人都选购浇灌农家肥的蔬菜。殊不知，施农家肥的蔬菜会被病原微生物污染，7天内污染最严重。     

食品加工设备的清洗与杀菌

为了制造符合卫生要求及高质量的食品，在食品加工过程中，除了重视防止原料微生物污染（一次污染）外，还须防止微生物二次污染，即防止制造机械、生产工具等微生物污染，保持制造设备的清洁环境，这也是防止食物中毒等事故最有效的方法。     

Research on Rapid Propagation of Gongshui Pomelo by Tissue Culture

[Objective] This study aimed to investigate the optimal medium and hor-mone combinations for efficient rapid propagation of Gongshui pomelo and analyze key technical measures in the tissue culture process. [Method] Stem tips and stem segments with buds were col ected from four varieties of pomelo adult trees as explants, to investigate the main effect and key regulatory factors of vegetative organs and tissue culture explants and to propose a series of measures to prevent and control microbial contamination. Final y, an efficient rapid propagation technology system of Gongshui pomelo was established. [Result] Spring shoot explants contained large amounts of auxin, cytokinins, gibberel ins and other growth regulators, which could be used for tissue culture with high bud generation rate and rapid growth. Different conditions led to various culture results. Specifical y, mature pomelo seeds should be generated on semisolid 1/2MS medium and transferred to solid MS medium for incubation. The propagation coefficient of stem segments with axillary buds was greater than that of stem tips, exhibiting significant differences. In ad-dition, the optimal hormone combination was 6-BA 0.5 mg/L ＋ NAA 0.5 mg/L, which significantly promoted the induction and differentiation of adventitious buds. [Conclusion] This study provided basis for basic research, production and application of pomelo germplasm resources.     

卫生部发出预警 防控食物中毒

近期,一些地方食物中毒事故高发。卫生部于2011年9月6日发出关于防控食物中毒的预警公告,就防止集体食堂发生食物中毒、严防亚硝酸和微生物污染引发的食物中毒,以及严防误食农药污染的食品及有毒植物等作出指示。     

影响饲料安全的因素

在日益关注动物食品安全和环保的情况下,探讨影响饲料安全的因素,对研究饲料安全的措施,无疑具有重要的现实意义。     

食品安全在美国

食品质量保证的最主要作用是提供安全和有益健康的食品。美国13个专业和科学部门所认可的指导原则阐述了以下重点要求：“监督和管理食品供给体系的首要目的是确保食品安全和公众健康，其次是防止欺骗、促进健康，提高美国食品和农产品在全球的竞争能力，以及确保美国食品安全标准与国际标准协调一致。”批评家几乎一致认为，美国人得到的食品供给是世界上最安全的。然而，近年有关食品掺假的频繁报道还是令人担忧。不但食品掺假事件的数量较多，而且性质也较为恶劣。与过去公众的注意力集中在与食品添加物相关的问题之上相比，目前对食品安…     

厦门市养殖牡蛎的微生物污染调查研究

2005年3到6月问对厦门市(集美,同安,岛内)3个区养殖的带壳牡蛎及市售牡蛎肉进行微生物检测的结果表明:厦门地区的养殖牡蛎已经受到微生物的污染,开壳牡蛎肉受污染较为严重,其细菌总数和大肠菌群等指标的合格率仅为50%和0%;带壳牡蛎的细菌总数指标虽100%合格,但大肠菌群指标却只有25%合格.牡蛎受微生物污染主要在剥壳后到食用前这一段时间,放置越久污染程度越严重;牡蛎剥壳后泡水会加速其微生物的生长.净化贝类虽然其细菌总数和大肠菌群数全都合格,但作者仍然认为不宜生食.