Results 21 to 30 of about 18,362 (168)
Cloning and Expression Analysis of Metallothionein(MT) Gene from Marsupenaeus japonicus [PDF]
, 2016 日本囊对虾是我国对虾养殖的重要品种，由于其相对较耐低温，而且抗病害能力较强，近年其养殖面积和规模迅速增加，尤其是在北方。随着养殖规模的扩大，日本囊对虾健康养殖的环境也越来越严峻，病害爆发越来越频繁。金属硫蛋白（Metallothionein，简称：MT）是一类广泛存在于生物体中的低分子量金属结合蛋白，具有解毒重金属、清除体内自由基、参与免疫调节等生物学功能。MT的重金属解毒功能能够减少重金属类杀菌杀虫药物和环境污染重金属对对虾的毒性。众多学者认为MT具有作为环境重金属污染监测生物指标的潜质 ...
石壮壮
core
Rare Metals, EarlyView.ABSTRACT The sluggish kinetics of the oxygen reduction reaction (ORR) necessitate developing oxygen electrodes with enhanced electrocatalytic activity for practical zinc–air battery applications. In this study, an iron‐doped copper sulfide electrocatalyst (CuFeNS‐PNC) anchored on metal–organic framework‐derived carbon substrates was designed, featuring
Taichong Chitboonyakasem +4 more
wiley +1 more source
野生动物学报, 2018 调查吉林省地区中国林蛙的生存环境以及中国林蛙各部位重金属含量,同时分析中国林蛙体内重金属含量与生态环境重金属之间的相关关系,评价中国林蛙生存环境重金属含量对中国林蛙体内重金属含量的影响。随机选择6个监测点,采集并检测中国林蛙生存环境中土壤、流动水、池中水和中国林蛙体内蛤蟆油、肝、骨、籽中的重金属含量。采用原子吸收法和原子荧光法检测林蛙各部位重金属总量以及铅、镉、铜、汞、砷元素的含量; 以土壤环境质量标准GB15618-1995 及地表水环境质量标准GB3838-20判断各种重金属元素含量超标情况 ...
韩曦英 朱健勋 于 澎
doaj
Development of Time-series Osmotic Pump Sampler and its Application for Trace Metals Monitoring of Water System [PDF]
, 2016 随着工业化进程的日渐加快，水体中的重金属污染日益严重。监测水中的重金属含量对保护环境和人类健康具有重要意义。受各种自然或人为因素的影响，重金属在不同区域水体中的浓度存在较大差异，而即使是同一地点，也可能时刻发生变化。高时空分辨率的监测数据有助于更好地研究重金属的污染分布及其随时间变化的规律。 目前常用的水环境采样技术，如定时定点人工采样和薄膜扩散梯度（DGT）采样技术，时空分辨率低。渗透泵采样作为一种新型采样技术，可长时间在现场采集样品，得到布放期间内污染物的时间序列浓度，提高数据的时间分辨率。然而 ...
卢冰艳
core
Rare Metals, EarlyView.ABSTRACT Aqueous zinc‐ion batteries (AZIBs) hold great promise for safe and sustainable energy storage, but their commercialization is impeded by severe Zn dendrite growth and interfacial instability. To address these challenges, we propose a defect engineering strategy employing ultrafine ZnAl2O4 (ZAO) nanoparticles (∼5 nm) with oxygen vacancy defects
Yilun Ren +9 more
wiley +1 more source
Optimizing CuO on 3D Ordered Macroporous CeO2 for CO Oxidation in Rich Hydrogen
Rare Metals, EarlyView.ABSTRACT CO preferential oxidation (CO‐PROX) in rich H2 is considered a feasible strategy to solve CO poisoning for fuel cells, but obtaining good activity at low temperatures is still a challenge. Herein, three‐dimensional ordered macroporous (3DOM) CuO/CeO2 catalysts were fabricated by a templating approach, with the metal–support interaction (MSI ...
Xiaohua Chen +7 more
wiley +1 more source
Shuitu Baochi Xuebao, 2011 通过野外采样与室内实验分析煤矸石重金属的释放活性,并利用潜在生态风险评价法分析煤矸石山周边土壤污染及其潜在生态风险特征。结果表明,实验用煤矸石中重金属主要以残渣态存在,Cu、Zn、Pb、Cr和Cd的残渣态分别占其总量的56.86%,53.27%,72.01%,68.61%和75.93%,不易发生释放迁移,但少量酸溶态和氧化物结合态重金属易被淋溶后在矸石山周围土壤中累积并造成重金属污染。煤矸石山周边土壤重金属含量随着距离的增加呈现减少趋势,表明周边土壤受到煤矸石重金属污染,并且在土壤表层重金属含量最高 ...
张明亮, 岳兴玲, 杨淑英
doaj
The health risk assessment of heavy metal pollution of marine food in Xiamen market [PDF]
, 2015 海产品味道鲜美、低脂、低胆固醇，是不可多得的健康食品，因此成为厦门居民餐桌上的常客。厦门地处东南沿海，海洋资源丰富，海产品的产量、居民的海产品消费量均位居全国前列。然而近年来包括厦门在内的我国近岸海域重金属污染情况的日益严峻将海产品的食用安全性推到了风口浪尖。鉴于此现状，本研究对厦门市售的4类12种海产品的典型重金属污染物铅（Pb）、镉（Cd）、铬（Cr）、总砷（As）进行监测和评价，同时对食用海产品的738名厦门市居民进行海产品膳食结构调查，利用美国环保署（EPA）推荐的健康风险评价模型 ...
闫双双
core
Rare Metals, EarlyView.ABSTRACT Cost‐effective and efficient non‐noble‐metal catalysts for selective lignin hydrogenolysis remain elusive, representing a significant challenge in biorefinery. Here, we prepared a nitrogen‐doped carbon supported CoNi bimetallic catalyst, which was successfully derived from zeolitic imidazolate framework (ZIF) via high‐temperature pyrolysis ...
Xingwei Luo +3 more
wiley +1 more source