连翘叶提取物抗油脂氧化作用的实验研究

乙醇提取连翘叶中的抗氧化物质,以猪油为底物,用烘箱储藏法测定抗氧化活性。结果表明:连翘叶提取物具抗氧化作用。     

微弧氧化法制备镁合金陶瓷膜的研究

采用双极性脉冲电源对置于Na2Al2O4溶液中的AZ91D镁合金进行微弧氧化处理，研究了溶液配方和电源参数（包括电压、频率、占空比等）对微弧氧化膜的组成与结构的影响。结果表明：不同的电参数作用下形成的氧化膜的结构是相似的，膜层由内层致密层和外层疏松层组成，其主要物相组成是Mgo和MgAl2O4；不同电参数对膜层的厚度的影响各不相同，随着电压和占空比的增大，膜层增厚速度将加大，而频率的影响则与之相反。     

钼酸银修饰电极的制备及其电化学性能研究

采用电化学方法首次在导电基体玻碳电极上制备出了钼酸银薄膜饰电极，研究了修饰电极的电化学行为．发现该电极在硫酸溶液中进行伏安扫描时具有良好的稳定性．研究了修饰电极对抗坏血酸的电催化作用。     

Fe salts as catalyst for the wet oxidation of o-chlorophenol

INTRODUCTION Chlorophenols (CPs) are chemicals widely used in industry to manufacture insecticides, herbicides, fungicides, biocides, and dye, are also found in the effluent of the pulp and paper mill industry, and are mainly man-made compounds, and have been recog-nized as organic pollutants of air, groundwater, soil and sediments. They are carcinogenic and stable in water. Most chlorophenols are listed as priority pol-lutants by the US Environmental Protection Agency (1988) due to th…     

从废木屑制取草酸工艺的研究

研究了以废木屑为原料 ,用氧化法制取草酸的工艺方法 ,确定了最佳工艺条件 :10 .0g废木屑、12mL5 0 %H2 SO4、6mL6 5 %HNO3 、0 .3g催化剂在 6 5°C下制得草酸的产率达 4 1.4 % .     

单加氧酶细胞色素P-450的模拟

本文评述了用金属卟啉模拟单加氧酶细胞色素P－450的研究现状及其在有机合成和生物医学等方面的应用．     

对硝基苯甲酸的合成研究

以邻二氯苯/丙酸做溶剂,在乙酸钴、溴化物复合催化剂催化下用空气氧化对硝基甲苯合成了对硝基苯甲酸,并对反应条件进行了研究,对硝基苯甲酸收率可达90.4%,且可以缓和对设备的腐蚀作用.     

纳米二氧化钛光催化降解有机废水的研究进展

纳米二氧化钛光催化剂具有处理效率高、工艺设备简单、操作条件易控制、无二次污染等优点。能够把多种有机污染物光催化降解为H2O和CO2,把溶液中的重金属离子还原为无毒的金属，且具有可直接利用太阳能的潜力，在有机废水处理方面显示出广阔的应用前景。本文简述了光催化剂的作用原理和影响因素。详细介绍了掺杂改性TiO2光催化剂目前在降解有机废水的研究现状。     

Six high-intensity interval training sessions over 5 days increases maximal oxygen uptake,endurance capacity,and sub-maximal exercise fat oxidation as much as 6 high-intensity interval training sessions over 2 weeks

BackgroundHigh-intensity interval training (HIIT) induces similar or even superior adaptations compared to continuous endurance training. Indeed, just 6 HIIT sessions over 2 weeks significantly improves maximal oxygen uptake (VO_2max), submaximal exercise fat oxidation, and endurance performance. Whether even faster adaptations can be achieved with HIIT is not known. Thus, we aimed to determine whether 2 sessions of HIIT per day, separated by 3 h, every other day for 5 days (double HIIT (HIIT-D), n = 15) could increase VO_2max, submaximal exercise fat oxidation, and endurance capacity as effectively as 6 sessions of HIIT over 2 weeks (single HIIT (HIIT-S), n = 13).MethodsEach training session consisted of 10 × 60 s of cycling at 100% of VO_2max interspersed with 75 s of low-intensity cycling at 60 watt (W). Pre- and post-training assessments included VO_2max, time to exhaustion at ∼80% of VO_2max, and 60-min cycling trials at ∼67% of VO_2max.ResultsSimilar increases (p < 0.05) in VO_2max (HIIT-D: 7.7% vs. HIIT-S: 6.0%, p > 0.05) and endurance capacity (HIIT-D: 80.1% vs. HIIT-S: 79.2%, p > 0.05) were observed. Submaximal exercise carbohydrate oxidation was reduced in the 2 groups after exercise training (HIIT-D: 9.2%, p = 0.014 vs. HIIT-S: 18.8%, p = 0.012) while submaximal exercise fat oxidation was significantly increased in HIIT-D (15.5%, p = 0.048) but not in HIIT-S (9.3%, p = 0.290).ConclusionSix HIIT sessions over 5 days was as effective in increasing VO_2max and endurance capacity and was more effective in improving submaximal exercise fat oxidation than 6 HIIT sessions over 2 weeks.     

天然有机质对锑的吸附及氧化

由于人类活动的影响,环境中的Sb污染越来越严重。我国是一个产Sb大国,由于长年的开采及冶炼,矿区周围的土壤、水、大气及植被均受到了不同程度的污染。另一方面,环境中普遍存在的天然有机质,由于其表面富有大量的官能团,能与环境中的Sb结合,从而影响这一污染物在环境中的迁移、转化及生物有效性。本文主要讨论了天然有机质对Sb的吸附及氧化作用的研究进展。