Results 31 to 40 of about 1,249,305 (180)

工业废水中Cr3+对厌氧微生物产甲烷毒性的研究

open access: yesGongye shui chuli, 2010
在温度为(35±1)℃的厌氧条件下,间歇性进行了厌氧产甲烷毒性研究,探讨了不同浓度Cr3+对厌氧微生物的抑制程度和毒性机理。结果表明,Cr3+对厌氧污泥中的产甲烷菌的活性有较为显著的抑制,当Cr3+为50 mg/L时,为轻度抑制;当Cr3+为100~150 mg/L时,为中度抑制;当Cr3+>200 mg/L时,为重度抑制。毒性作用机理为:当Cr3+≤50 mg/L时为代谢性毒素,当Cr3+为100 mg/L时为生理性毒素,当Cr3+≥150 mg/L时为杀菌性毒素。
罗亚红, 樊静, 何成达, 李怡帆
doaj   +2 more sources

Changing trends in prenatal screening and treatment of cytomegalovirus infection in France: 7‐year national cohort study (2017–2023)

open access: yesUltrasound in Obstetrics &Gynecology, Volume 67, Issue 6, Page 756-763, June 2026.
ABSTRACT Objectives Cytomegalovirus (CMV) is the leading cause of congenital infectious neurosensory impairment. We aimed to present national epidemiological data on maternal CMV infection during pregnancy in France, focusing in particular on primary infection in the periconceptional period or first trimester, and to assess the impact of changes in ...
P. Coste‐Mazeau   +176 more
wiley   +1 more source

驻马店市某制药厂废水的生物毒性评价

open access: yesGongye shui chuli
以驻马店市某制药厂废水为研究对象,评估该制药废水处理工艺流程中4个节点(进水、生物处理出水、类Fenton反应出水和Fenton反应出水)水样对不同营养级别指示生物的急性毒性效应,并分析4个工艺节点对生物急性毒性的削减效果。结果表明,制药废水进水对发光细菌、斜生栅藻、大型蚤、斑马鱼和本土鲫鱼的半数效应浓度(EC50)在4.85%~15.40%,急性毒性单位(Acute toxic unit,TUa)在6.5~20.6,属于高毒废水。生物处理对制药废水中COD和TOC的去除率高达94 ...
路忻, 张清敏, 马翠, 刘玉浩
doaj   +2 more sources

EB病毒相关性疾病病理学研究的进展

open access: yesZhongshan Daxue xuebao. Yixue kexue ban, 2005
报告作者及其同事在鼻咽癌高发的广州地区所做EB 病毒相关性疾病病理学研究的进展。内容 包括: ①EB 病毒病理生物学; ②EB 病毒相关性疾病病理学; ③检测组织中的EB 病毒; ④EB 病毒血清学。 重点是EB 病毒相关性疾病的病理学以及评估各种检测EB 病毒相关性疾病患者组织和血清中EB 病毒的方 法。
宗永生   +4 more
doaj  

Metal‐Doped Carbon‐Based Nanomaterials: Photothermal Mechanism Innovation and Precision Therapy Advancement in Antibacterial and Antitumor Applications

open access: yesRare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT Metal‐doped carbon‐based nanomaterials (M‐CNM) play a strategically significant role in next‐generation precision antibacterial and antitumor therapies, as they integrate synergistic photothermal ablation, catalytic reactive oxygen species (ROS) generation, and multimodal imaging capabilities. However, their clinical translation is hindered by
Pengxiang Liu   +5 more
wiley   +1 more source

Hierarchical Structured TiO2/Boron‐Doped Diamond for Efficient Photo‐Electrocatalytic Degradation

open access: yesRare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT The discharge of refractory organic dye wastewater poses a significant threat to the ecological environment, necessitating the development of efficient treatment technologies. Herein, a uniform TiO2 array (TiO2‐AR) electrode is fabricated using a combination of magnetron sputtering and a mask plate process with a boron‐doped diamond (BDD ...
Haiming Sun   +10 more
wiley   +1 more source

Mechanism of Selective Arsenic Purification via Reductive Vacuum Sublimation: From Oxygenated Crude Arsenic to High‐Purity Arsenic

open access: yesRare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT Arsenic presents a critical duality as both a hazardous environmental pollutant and an indispensable material for advanced semiconductor technologies. This study proposes an integrated reductive vacuum sublimation strategy, assisted by carbon and lead additives, to purify crude arsenic containing high oxygen (7.4%) and antimony (1326 mg kg−1).
Hongrui Xiang   +6 more
wiley   +1 more source

稀有■鲫亚慢性毒性试验

open access: yes, 1998
研究了一种快速评价有毒化学品对稀有鲫慢性毒性的试验方法。选择<3d龄的稀有峋鲫幼鱼开始暴露,试验药物为国际标准参比毒物CU(+2),Cr(+6),Zn(+2)和PCP;试验温度为25±1℃,每天更换试验液一次,试验持续5d。以现存量为测试指标,Cu(+2),Cr(+6),Zn(+2)和PCP对稀有鲫的无可观察效应浓度[NOEC]为20,2500,100,40ug/L;最低可观察效应浓度[LOEC]为40,5000,200,80ug/L,与7d亚慢性毒性试验结果相接近。试验结果表明 ...
胡炜,成水平,周永欣
core  

骆 驼 蓬 总 碱 的 毒 性

open access: yesZhongshan Daxue xuebao. Yixue kexue ban, 1998
目的: 研究骆驼蓬总碱的毒性。方法: 用骆驼蓬总硷对小鼠进行急性毒性, 大鼠进行亚急性毒性实验。结果: 小 鼠急性毒性实验测出骆驼蓬总硷, 于腹腔、静脉注射及灌胃 3 种给药途径 1 次给药的 LD50, 以及可信限分别为: 144 mg/kg ( 131. 7~ 157. 9 mg/kg)、56 mg/kg( 48. 3~ 64. 9 mg/kg)、289 mg/kg( 218. 5~ 382.
杨小平 潘启超 潘伟光 梁永钜 李奕荪 李春杰
doaj  

稀有鮈鲫急性、亚慢性毒性试验方法及其在东湖底泥毒性研究中的应用

open access: yes, 2006
稀有鮈鲫是我国特有的一种小型鲤科鱼类。作为《化学品测试方法》推荐的受试生物之一,稀有鮈鲫正越来越多地应用于包括生态毒理学在内的众多研究领域。本文选择参比毒物铬和五氯酚为受试物,研究并验证了稀有鮈鲫急性及亚慢性毒性试验方法,并将其应用于对东湖底泥毒性的研究中;另外,本试验利用急性毒性试验方法对比了稀有鮈鲫、剑尾鱼和斑马鱼对铬和五氯酚毒性的敏感性。所获得的主要结果如下: 1.铬和五氯酚对稀有鮈鲫急性毒性试验各重复6次,结果证实稀有鮈鲫对两种参比毒物的毒性均较为敏感 ...
姜福全
core  

Home - About - Disclaimer - Privacy