熄焦粉吸附处理焦化厂生化废水的试验研究

针对目前焦化厂生化脱酚废水的化学需氧量（COD值）普遍超标现象，采用焦化厂自产的熄焦粉给予吸附处理，使焦化厂生化废水的化学需氧量达到国家一级排放标准，在某种程度上可取代废水的三级处理，即代废不的深度处理。     

Inhibition of DNA restrictive endonucleases and Taq DNA polymerase by trimalonic acid C60

Activities of trimalonic acid fullerene (TMA C_60) on DNA restrictive enzymatic reaction were investigated by using two restrictive endonucleases Hind III and EcoR I and plasmid pEGFP-N1 with single restric-tive site for both enzymes. Meanwhile, TMA C60 was also tested to clarify its effects on polymerase chain reaction (PCR) with the catalyst of Taq DNA polymerase and the template of plasmid pEGFP-N1. The products from restrictive reactions or PCR were detected by agarose gel electrophoresis. It was found that the product amounts from restrictive reactions or PCR decreased significantly with addition of TMA C60. The inhibition by TMA C60 was dose-dependent and IC50 values for reactions of Hind III, EcoR I and PCR were 16.3, 6.0 and 6.0 μmol/L, respectively. Addition of two scavengers of reactive oxygen species (ROS), L-ascorbic acid-2-phosphate ester magnesium and sodium azide at the con-centrations of 2―10 mmol/L did not antagonize the activities of TMA C60 against PCR and two restrictive reactions. However, increase of Taq DNA polymerase amounts in PCR system antagonized the activities of TMA C60. These data implied that TMA C60 was able to inhibit the activities of the three above-mentioned enzymes involved in DNA metabolism, and that this inhibition probably did not correlate to ROS.     

毛冬青甲素对心脏功能和血流动力学的作用

在整体猫心脏实验表明毛冬青甲素能增强心叽收缩性,增加心输出量、动脉血压和外周血管阻力,轻度减慢心率,增加分钟张力——时间指数,以低效率的方式增加心脏作功;轻度改善心脏的舒张特性。离体豚鼠心脏制备也表明毛冬青甲素增强心脏收缩;该药的量效曲线与异丙肾上腺素的量效曲线不平行,且不受心得安(10~(-7)M)的影响而右移,提示该药的正性肌力作用可能是对心肌直接作用,并可能不是通过β受体而实现。毛冬青甲素与哇巴因合用,不影响豚鼠哇巴因LD100。本文报导了一种利用(dp/dt)/P曲线测取左室等容舒张期压力降低的时间常数(T)的简便可行方法。     

环境因素对牛蛙胚胎发育的影响

本文对影响牛蛙胚胎发育的四种主要环境因素作了系统的研究。牛蛙胚胎发育的上限致死温度为36℃,下限温度为12℃,适宜温度为20～33℃,最适温度范围为26、30℃;在适宜温度范围内,随着温度的升高,胚胎发育速度加快,在水温30℃时,胚胎发育的速度比在20℃时快一倍。胚胎发育的不同阶段对水中溶氧量的要求不同,在心跳期以前,水中溶氧量必须保持在3.5mg/升以上;在鳃盖完成期以前应保持在5.1mg/升以上,29天以上的蝌蚪对溶氧的要求又比较低。孵化用水的pH值应保持在6.5～7.5的范围内。剧烈的机械振荡对早期胚胎有明显的不良影响。     

水质溶解氧测定结果的计算机处理

本文阐述了水质分析中的一个重要分析指标溶解氧的测定方法，并对其测量结果进行微机处理，使得给出的数值更具科学性，同时也给结果的处理带来了很大的方便。     

Oxygen consumption and biosynthetic function in perfused liver from rats at different stages of development

Changes in mitochondrial function were studied in perfused liver from rats aged 24 – 365 days. Oxygen consumption together with the rates of gluconeogenesis, urea synthesis and ketogenesis were determined. Basal mitochondrial respiration as well as the ability of the liver to synthesize glucose, urea and ketone bodies declined from 24- to 365-day-old rats. On the other hand, on transition from 24 to 60 days the liver oxidation rate of hexanoate, sorbitol and glycerol is enhanced, but not of ketone bodies or palmitate. Our results show that the transition from weaning to middle age is accompanied by defined changes in hepatic substrate oxidation. From the observed time course of the decrease in basal and substrate-stimulated oxygen consumption, it is concluded that in rat liver cells a decline in respiratory chain function, long-chain fatty acid and ketone body metabolism, gluconeogenesis and ureogenesis occurs at a relatively early life stage. Received 19 June 1998; received after revision 11 September 1998; accepted 11 September 1998     

硅单晶中的氢催化氧沉淀

红外光谱法研究了硅单晶中的氢催化氧沉淀。     

运动负荷价值阈在体育教学中的应用

从身体锻炼的价值出发，根据体育课内部结构和学生心率变化，采用文献综述和材料分析等方法，制定出体育课的价值阈标准，以对体育课的全过程进行有效的控制和调节．     

硼/磷系阻燃剂协同效应的研究

合成了几种新型的有机硼阻燃剂,与含磷阻燃剂对棉织物进行协同阻燃研究,以试样的限氧指数LOI为评价指标,计算出协同指数,证实了阻燃剂之间协同效应作用的存在。