三步法处理钻井废水的实验研究

根据钻井废水的污染特征和目前处理中存在的问题,提出了“酸化中和—混凝—活性炭吸附”三步处理的方法,并对其可行性进行了实验研究。结果表明,酸化中和阶段,可将废水中的悬浮物去除80%以上,CODCr去除50%;混凝后CODCr去除率达到75%;最后,采用活性炭吸附进行深度处理,可使CODCr值下降为200 mg/L以下,达到排放标准。     

掺杂剂对聚苯胺/二氧化钛复合薄膜氨敏特性的影响

室温条件下,采用平面叉指电极式器件,运用原位化学氧化聚合和静电力自组装相结合的方法分别制备了盐酸掺杂和对甲苯磺酸掺杂聚苯胺/纳米二氧化钛(PANI/TiO2)复合薄膜气体传感器,并通过电子扫描显微镜(SEM)对薄膜进行了分析表征,研究了其在常温下对NH3气的敏感特性。实验结果表明,盐酸掺杂PANI/TiO2复合薄膜较对甲苯磺酸掺杂PANI/TiO2薄膜具有更好的灵敏度和响应恢复特性以及更好的稳定性。该研究有助于开发低功耗、高灵敏度的NH3气体传感器。     

白叶蒿脂肪酸成分研究

采用气相色谱法,对白叶蒿脂肪酸成分进行了分析,结果表明,白叶蒿中含有22种脂肪酸（鉴定了其中19种）,且多不饱和脂肪酸与饱和脂肪酸相对含量比（PUFA/SFA）为3.29,白叶蒿具有降血脂功能。     

弱酸电离度和电离常数测定实验的改进

本文通过对弱酸电离平衡的分析,提出了一种测定弱酸电离度和电离常数的新的方法。     

胱氨酸母液粉中氨基酸含量与营养评价

对胱氨权母液粉的氨基酸含量进行了测定分析,并与畜牧业中常用的部分饲料原料进行了比较。结果表明：胱氨酸母液粉中含有１７种氨基酸,其中９种为生长动物必需氨基酸,虽然必需氨基酸组成不平衡,介必需氨基酸含量介于豆肉骨粉之间。     

山梨酸工业废水生物处理动力学研究

分析了微生物降解山梨酸工业废水的机理。在Monod方程的基础上推导出稳态条件下废水降解动力学模式。利用最小二乘法对动力学参数进行了优化设计。     

1-羟基丙叉-1,1-二膦酸的合成及缓蚀阻垢性能研究

以三氯化磷、丙酸为原料 ,采用梯度升温法合成了 1 -羟基丙叉 - 1 ,1 -二膦酸 ( HPDP) .经元素分析、红外光谱 ( IR)、热重 -差热分析 ( TG- DTA)等方法初步确证了合成产物 ,并评定了其缓蚀阻垢性能 .     

Poly-ACBK/MWNTs/GC电极在异构体存在下伏安法选择测定邻苯二酚

通过电聚合酸性铬蓝K(ACBK)于多壁碳纳米管(MWNTs)修饰玻碳(GC)电极上构建了一种新的修饰电极。研究了该电极的电化学性质,结果表明该电极表现出优异的电催化和选择性能,可在异构体存在下伏安法选择测定邻苯二酚。线性范围在1×10-6-1×10-4mol.L-1,最低检测限为1×10-7mol.L-1。构建的电极对水样进行了测定并获得了满意的结果。     

Assessment of the Dose–Response Relationship Between Folate Exposure and Cognitive Impairment: Synthesizing Data from Documented Studies

The dose–response relationship between folate levels and cognitive impairment among individuals with vitamin B12 deficiency is an essential component of a risk-benefit analysis approach to regulatory and policy recommendations regarding folic acid fortification. Epidemiological studies provide data that are potentially useful for addressing this research question, but the lack of analysis and reporting of data in a manner suitable for dose–response purposes hinders the application of the traditional evidence synthesis process. This study aimed to estimate a quantitative dose–response relationship between folate exposure and the risk of cognitive impairment among older adults with vitamin B12 deficiency using “probabilistic meta-analysis,” a novel approach for synthesizing data from observational studies. Second-order multistage regression was identified as the best-fit model for the association between the probability of cognitive impairment and serum folate levels based on data generated by randomly sampling probabilistic distributions with parameters estimated based on summarized information reported in relevant publications. The findings indicate a “J-shape” effect of serum folate levels on the occurrence of cognitive impairment. In particular, an excessive level of folate exposure is predicted to be associated with a higher risk of cognitive impairment, albeit with greater uncertainty than the association between low folate exposure and cognitive impairment. This study directly contributes to the development of a practical solution to synthesize observational evidence for dose–response assessment purposes, which will help strengthen future nutritional risk assessments for the purpose of informing decisions on nutrient fortification in food.     

羟基类非离子活性剂硫酸化过程研究

本文主要是对用氛基曦酸合成硫酸酮盆类衣面活性荆反应条件的研究，这些条件包括反应时问、反应滋度、加并摩尔比、催化荆等方面，通过实脸表明氛墓磺酸是-种很好的硫酸嘴化试荆，综合分析实脸结果，从而确定了该合成反应的适宜条件.