搜索结果: 1-13 共查到“理学 COD”相关记录13条 . 查询时间(0.078 秒)
中国科学院微生物研究所专利：一株耐高盐耐高COD盐水球菌菌株和来源该菌株的内源质粒
Microevolution in time and space: SNP analysis of historical DNA reveals dynamic signatures of selection in Atlantic cod
fi sheries-induced evolution Gadus morhua genome scan
2015/12/11
Little is known about how quickly natural populations adapt to changes in their environment and how temporal and spatial variation in selection pressures interact to shape
patterns of genetic diversi...
The invasive ctenophore Mnemiopsis leidyiposes no direct threat to Baltic cod eggs and larvae
Mnemiopsis leidyiposes Baltic cod eggs
2014/4/4
Since its invasion in to the Baltic Sea in 2006, the ctenophore Mnemiopsis leidyi has been suspected of serious
predation on the early life stages of Baltic cod (Gadus morhua callarias L.) due to a t...
Reduction of COD from Micro-Polluted Water through Adsorption of Activated Carbon-Attapulgite Composite Adsorbent
Activated Carbon (AC) Adsorbent Adsorption Attapulgite COD Micro-Polluted Water Reduction
2011/11/15
The aim of this study was the assessment of reduction of chemical oxygen demand (COD) from micro-polluted water using activated carbon-attapulgite composite adsorbent prepared using activated carbon a...
化学需氧量(COD)快速测定新方法研究进展
化学需氧量 光电催化电化学 二氧化钛
2013/9/16
化学需氧量是反映水体有机污染程度的综合性指标, 是我国控制污染总量排放的重要水质参数, 但其常用的标准测定方法具有操作烦琐、分析时间长、成本高且二次污染严重的缺点. 本文综述了近年来提出的新型化学需氧量测定方法, 特别是基于TiO2纳米管阵列的光电催化法, 这些方法以羟基自由基为主要氧化剂与有机物发生反应为基础, 向着快速、准确、低耗、无二次污染、在线监测的全新方向发展, 为环境中有机污染物的监测...
Use of Otolith Length and Weight in Age Determination of Poor Cod (Trisopterus minutus Linn., 1758)
Poor cod Trisopterus minutus otolith age
2010/3/25
Totally 189 poor cod (Trisopterus minutus Linn., 1758) specimens were collected by trawling in the central Aegean Sea between April 2001 and March 2002. The relationship of the otolith length and weig...
Growth, Mortality, and Reproduction of Poor Cod (Trisopterus minutus Linn., 1758) in the Central Aegean Sea
Trisopterus minutus age growth mortality reproduction sexual maturity length central Aegean Sea
2010/3/25
A total of 1527 of poor cod (Trisopterus minutus Linn., 1758) were collected by trawl hauls between April 2001 and March 2002 from İzmir Bay (central Aegean Sea). The size of the fish (total leng...
[Ir(COD)(diphos)Cl配合物活化sp^3 C-H键及其促进CO、CO2插入Ir-C键反应性能的研究
有机磷化合物 膦 化学键 插入反应 分子轨道理论 羧基 铱络合物 羰基 有机过渡金属络合物 杂化 环辛二烯 P
2007/12/19
摘要 本文利用[Ir(COD)(μ-Cl)]2与双膦螯合配位体之间的反应合成了三个新的配合物[Ir(COD)(diphos)]Cl(diphos=dmpe、depe、dppe),用IR、NMR、电导和元素分析测定了结构.以CH3CN为反应底物分别考察了它们活化sp^3C-H键的能力及其反应规律.在此基础上进一步研究了使CO、CO2插入生成的Ir-CH2CN键的可能性.结果表明:在温和条件下进行这一...
二氧化钛紫外光在线消解测定COD的研究
化学需氧量 二氧化钛 在线分析 光催化氧化
2012/10/9
以TiO2-K2Cr2O7协同光催化氧化体系为基础，结合流动注射分析方法建立了一种快速测定水样中化学需氧量(COD)的简便方法.该方法测试速度快，不需有毒、昂贵的试剂，具有广阔的应用前景.COD含量在10～100mg·L-1和100～1000mg·L-1范围内，吸光度与COD含量均呈良好的线性关系；测定30mg·L-1和300mg·L-1的COD标准溶液，R...
April 23, 2007，The tale of the Cape Cod cleanup has all the elements of an epic novel: It’s long. It offers intrigue, heroes and plot twists. And, of course, it changes the world.Denis LeBlanc, who ha...
Effects of oxidised dietary cod liver oil on the reproductive functions of Wistar rat
oxidised cod liver oil rat fertility reproduction organ weights
2014/3/19
Weanling Wistar rats, males and females, were fed for 185 days with diets containing 15% of dietary fat in the form of a mixture of lard and partially oxidised cod liver oil. The proportion of cod liv...
Effects of Cod Liver Oil and Chromium Picolinate Supplements on the Serum Traits, Egg Yolk Fatty Acids and Cholesterol Content in Laying Hens
Cod Liver Oil Chromium Picolinate Serum Traits Egg Yolk Cholesterol Laying Hens
2016/4/13
This study investigated the effects of cod liver oil and chromium picolinate on the serum traits and egg yolk fatty acids and cholesterol content in laying hens. One hundred 45-week old single comb wh...
Effects of Ozonation on COD Elimination of Substituted Aromatic Compounds in Aqueus Solution
Effects Ozonation COD Elimination Substituted Aromatic Compounds Aqueus Solution
2010/6/29
The chemical oxygen demand (COD) change of various substituted aromatic compounds, namely benzoic acid, p-aminobenzoic acid, p-toluenesulfonic acid, sulfanilic acid, nitro benzene, resorcinol, p-cres...