相关实验视频
Updated: Jan 28, 2026

08:49
External Cephalic Version: Is it an Effective and Safe Procedure?
Published on: June 6, 2020
15.8K
DDT (二二三乙):MAK价值文档,附录 - 翻译从2023年开始的德语版本
1Institute of Applied Biosciences. Department of Food Chemistry and Toxicology. Karlsruhe Institute of Technology (KIT) Adenauerring 20a, Building 50.41 76131 Karlsruhe Germany.
概括
在欧盟和德国,DDT (二二三乙) 已不再获得批准. 由于缺乏高优先级的重新评估,其职业暴露限值和分类被暂停.
科学领域:
- 环境科学 环境科学
- 毒理学 毒理学 毒理学
- 职业健康 职业健康 职业健康
背景情况:
- 欧盟和德国禁止使用DDT (二二三乙) 和其制剂.
- 以前关于DDT状态的文档已经过时了.
- 目前的数据情况需要对其分类进行审查.
研究的目的:
- 根据当前的数据,更新DDT及其制剂的状态.
- 关于暂停DDT的MAK值和分类的通知.
- 澄清DDT在MAK和BAT值清单中的列表.
主要方法:
- 审查欧盟和德国目前的监管状况.
- 马克委员会对重新评估的必要性进行评估.
- 基于可用的毒理学数据进行分类审查.
主要成果:
- 不再批准DDT和DDT制剂的使用.
- 马克委员会认为,对DDT进行新的评估并不是首要任务.
- 暂停了对DDT的MAK值和分类.
- 对于不再评估的物质,DDT被列在MAK和BAT值清单的第二部分.
结论:
- 在欧盟或德国,DDT的使用未经批准.
- 暂停MAK值反映了目前缺乏高优先级的重新评估.
- 该物质的状态更新为"不再评估".
相关概念视频
Translation
156.1K
Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of...
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of...
156.1K
Initiation of Translation
38.9K
Initiating translation is complex because it involves multiple molecules. Initiator tRNA, ribosomal subunits, and eukaryotic initiation factors (eIFs) are all required to assemble on the initiation codon of mRNA. This process consists of several steps that are mediated by different eIFs.
First, the initiator tRNA must be selected from the pool of elongator tRNAs by eukaryotic initiation factor 2 (eIF2). The initiator tRNA (Met-tRNAi) has conserved sequence elements including modified bases at...
First, the initiator tRNA must be selected from the pool of elongator tRNAs by eukaryotic initiation factor 2 (eIF2). The initiator tRNA (Met-tRNAi) has conserved sequence elements including modified bases at...
38.9K
Termination of Translation
27.6K
The large ribosomal subunit has several important structures essential to translation. These include the peptidyl transferase center (PTC) - which is the site where the peptide bond is formed - and a large, internal, water-filled tube through which the nascent polypeptide moves. This latter structure is called the Peptide Exit Tunnel, and it begins at the PTC and spans the body of the large ribosomal subunit. During translation, as the nascent polypeptide chain is synthesized, it passes through...
27.6K
Guidelines for Nursing Documentation I
1.8K
Quality documentation and reporting share essential characteristics that ensure they are practical and valuable resources for those who use them. These characteristics are:
Factual:
The following points emphasize the significance of upholding accurate and unbiased documentation in healthcare.
Factual:
The following points emphasize the significance of upholding accurate and unbiased documentation in healthcare.
1.8K
Methods of Documentation V: CBE
1.4K
Charting by Exception, or CBE, is a method of documentation used in healthcare, particularly in nursing, that focuses on documenting only significant or abnormal findings rather than recording every detail. This approach aims to streamline the documentation process, improve efficiency, and ensure that healthcare providers can quickly identify deviations from normalcy in patient assessments.
In CBE, healthcare professionals establish predefined standards of practice that define what constitutes...
In CBE, healthcare professionals establish predefined standards of practice that define what constitutes...
1.4K
Formats for Nursing Documentation
1.9K
Nursing documentation encompasses various formats designed to capture precise patient data, facilitate communication among healthcare team members, and ensure comprehensive and accurate patient records. Let's explore each of these formats in detail:
Nursing Assessment Form:
• A nursing assessment form is a foundational document that captures detailed patient data from physical assessments and nursing histories.
• It includes patient demographics, medical history,...
Nursing Assessment Form:
• A nursing assessment form is a foundational document that captures detailed patient data from physical assessments and nursing histories.
• It includes patient demographics, medical history,...
1.9K

