Sustainable development. With or without mankind?

The author challenges the conventional wisdom that the main risk to Western development is environmental degradation caused by mankind. Concern over the greenhouse effect and global warming have more to do with millenium fever than reality. There is still very little evidence to suggest that these environmental phenomena result from human activity. What we do know is that there have been major cyclical fluctuations throughout history. The author cautions against implementing ‘scientistic’ policies in the face of such doubts, just because it is trendy to do so.     

多元统计分析方法在钛白粉生产水解工序能力评价中的应用研究

硫酸法钛白粉生产中水解工序具有三个基本质量特性且相互有一定相关性,因而对水解工序不能直接进行一元工序能力指数有效评价。本文首次采用多元统计分析的方法解决了在钛白粉生产的水解工序实例中进行多元工序能力指数综合评价的问题,不仅为出入境检验检疫机构日常监管出口钛白粉分类管理企业的关键过程,提出了一种客观科学的评价方法,而且为企业加强水解工序的工艺指导和自我质量控制提供了依据。     

酶解液相色谱法检测硫酸软骨素含量及物种来源鉴定

本文建立了硫酸软骨素含量测定方法及不同物种来源的硫酸软骨素的鉴定方法。用酶解法将硫酸软骨素A、C、B酶解成二糖组分Di-4S,Di-6S和Di-0S,以去离子水和氯化钠溶液为流动相,在波长232 nm处采用阴离子交换柱Hypersil-SAX（ID 4.6 mm×250 mm）的高效液相色谱法同时检测硫酸软骨素A、B、C对应的二糖组分,硫酸软骨素的总量由3者含量相加而得。比较硫酸软骨素A、C的二糖组分Di-4S,Di-6S的峰面积比值,可确定硫酸软骨素的来源。硫酸软骨素在5000~15000μg/mL浓度范围内线性关系良好（r=0.9992）,平均回收率为99.98%,RSD为1.86%。本方法能够较好地实现对鲨鱼、牛、鸡或者猪来源的硫酸软骨素溯源问题。