下扬子地区中生界古地磁及其构造解析

对在东经115°30′～119°15′、北纬29°30′～34°范围内的下扬子地区中生界,笔者分设10个采点采集定向标本58块。岩样经系统退磁和各种常规检验,并同步进行了磁组构解析、筛选出原生剩磁,从而较系统地获得了该区内T_3-K_2各层系有代表性的古地磁资料。经与华北、华南中生代以来古地磁资料对比后发现:下扬子层体从三叠纪开始于赤道附近与华南地块分离,在晚侏罗—早白垩世快速向北运动,至中纬度带与华北地块拼贴而包容于白垩纪以来的华北块体,晚白垩世随华北块体转变为指向北西西方位的运动,到早第三纪晚期开始又转变为指向南南东方位朝低纬度快速运动,直至晚第三纪晚期才与中生代以来一直在中低纬度带上徘徊的华南地块拼合,从而构成了统一的中国东部大陆块体。     

细叶草乌的化学成分研究

从细叶草乌根中首次分离得到12个化合物,通过理化性质及波谱分析,将其分别确定为滇乌碱(Ⅰ)、乌头碱(Ⅱ)、丽江乌头碱(Ⅲ)、塔拉萨敏(Ⅳ)、8-去乙酰滇乌碱(Ⅴ)、展花乌头宁(Ⅵ)、大黄酚(Ⅶ)、β-谷甾醇(Ⅷ)、棕榈酸(Ⅸ)、4,4'-二甲氧基联苯(Ⅹ)、胡萝卜苷(Ⅺ)和1-O-对乙氧肉桂酰基-D-吡喃葡萄糖(Ⅻ).参9     

Intervention research on influence of biomass briquette on human health

Raw coal (RC) is the main fuel in many, especially rural parts of China. Biomass briquette (BB), which has less SO₂ emission, was developed as a cleaner alternative for RC. In this research, the cooking fuel of a group of countrywomen was switched from RC to BB and studied for health effects. Five biological indices percent of comet cell (COMET), lysozyme saliva (LYS), malondialdehyde (MDA), superoxide dismutase (SOD), and glutathione peroxidase (GSH-PX) were chosen. All indices were measured three times during the 18-month experiment. Statistical analysis shows that there are significant changes in the indices. Using BB as a cooking fuel improves the function of anti-oxidation system and the nonspecific immune system, and reduces the DNA damage, which is negatively related to LYS and SOD.     

Carrousel氧化沟系统出水COD预报的神经网络模型

以河南漯河市污水净化中心的氧化沟系统为考察对象,针对该系统进水水质复杂,控制滞后的难点,引入人工神经网络的理论和方法,对其进行模拟分析,建立了基于BP网络的氧化沟系统出水COD预报模型。模型性能检验和灵敏度检验表明,建成的模型准确度高,适应性强,可直接用于该系统出水COD预报。这为氧化沟工艺在线控制提供了一条简便的途径。