纤维原料聚乳酸由于使用原料为自然可再生的材料,用聚乳酸生产的产品可在后期进行生物降解,从原料到成品,生产过程都是较为绿色环保的,用途越来越广,可作为纤维原料,也可用作制造食品包装、食品接触产品的原料.由于聚乳酸制成的食品接触产品有可降解方面的优势,在与食品接触方面的应用越来越多,聚乳酸制可降解的餐具等日益成为人们日常生活的组成部分.聚乳酸制产品的日益流行,要求此类产品的质量安全方面的管控更为精准有效.本文分析了聚乳酸产品的生产现状及成品销售过程中可能存在的产品质量安全风险问题,对聚乳酸制食品接触产品的质量安全风险出现的关键环节进行分析,对产品质量安全风险项目进行风险分析,并提出对风险问题进行控制的方案方法,对相关产品的生产企业的产品经营和质量安全的管控有较好的指导作用,为产品的质量再提升有更强的警示意义,为政府监管、企业生产以及市场和消费者了解相关产品的风险内容和控制提供可行性探讨,提升产品的质量安全,助力消费者进行市场监督,提升产品的竞争力.

[Objective] To save the amount of peat and realize the reuse of agricultural wastes. [Method] The cucumber was cultivated by mixing peat,coir pith,vermiculite and perlite into different treatments according to different volume ratios. T0（CK）is grass carbon:coir pith:vermiculite:perlite=3:1:1:1,T1 is grass carbon∶coir pith ∶vermiculite ∶perlite =2 ∶1 ∶1 ∶1,T2 is grass carbon:coir pith ∶vermiculite ∶perlite =1 ∶2 ∶1 ∶1,T3 is grass carbon:coir pith∶vermiculite∶perlite=0∶3∶1. [Result] The plant height,stem diameter,leaf area,fresh and dry weight,root-shoot ratio,strong seedling index and total chlorophyll content of cucumber seedlings under T1treatment were higher than those under other treatments. The growth index of cucumber seedlings under T2treatment was not significantly different from the control treatment. [Conclusion] Coir pith can be used as a substitute for peat in cucumber seedling cultivation,and proper addition ofCoir pith can promote the growth of cucumber seedlings.

本文对美国木包装中截获的两种星吉丁进行了详细介绍.并与有重要经济意义且在形态上不易区分的几种星吉丁种类进行了区分.美国星吉丁属昆虫种类多样,是危害严重的重要林木害虫,准确的种类鉴定对防止该虫进入我国具有重要意义.

According to the conserved gene sequences of ALV in GenBank,a pair of the specific primers were designed.Through the optimization of reaction conditions,the PCR detection method was established.Then the ten tissue samples separated from different local chicken breeding bases in Jiangsu province were detected by PCR.The results showed that 90% of the suspected samples were ALV positive and the normal chicken liver tissue was ALV negative.The amplified target gene was cloned,sequenced and compared with the reference nucleotide sequence in GenBank,the results showed that the target gene fragment was 300 bp,and the homology of nucleotides was more than 97%.The study showed that J-subtype ALV existed in the local chickens in Jiangsu province.

Based on the commodity inspection of import and export,the paper analysises the current situation of inspection and quarantine standards,and proposes strategy for establishment and management of standards,which will help to achieve leap-forward development of SN standards.