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毒理学关注阈值(TTC)方法在化妆品安全评估中的应用及案例
毒理学关注阈值(Threshold of Toxicological Concern,TTC)方法是一种在对大量化学物的化学结构特征和相关毒理学数据分析的基础上,为不同类别化学物的人体暴露水平建立一个安全阈值的新的风险评估工具。
上海初中英语最有效的背单词方法——词根词缀记忆大全(共93页)
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朋友们,今天要带大家探索一篇杂志《Advanced Science》期刊全称:Advanced Science期刊简称:Adv. Sci.发表年份:2025当期影响因子(IF):14.
下一代芯片,靠他们了
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《科学》(20190607出版)一周论文导读
第6444期364卷类器官OrganoidsCancermodelingmeetshumanorganoidtechnology癌症模型“遇见”人体器官技术作者。
《自然》(20200709出版)一周论文导读
The discovery of a radioactively powered kilonova associated with the binary neutron-star merger GW170817 remains the only confirmed electromagnetic counterpart to a gravitational-wave event. Observations of the late-time electromagnetic emission, however, do not agree with the expectations from standard neutron-star merger models. The pulsar PSR J1913+1102 is a double system in a five-hour, low-eccentricity orbit, with an orbital separation of 1.8 solar radii, and the two neutron stars are predicted to coalesce in。
《自然》(20220317出版)一周论文导读
Oxidation can deteriorate the properties of copper that are critical for its use, particularly in the semiconductor industry and electro-optics applications. Here we report the fabrication of copper thin films that are semi-permanently oxidation resistant because they consist of flat surfaces with only occasional mono-atomic steps. First-principles calculations confirm that mono-atomic step edges are as impervious to oxygen as flat surfaces and that surface adsorption of O atoms is suppressed once an oxygen face-centred cubic surface site coverage of 50% has been reached. These combined effects explain the exceptional oxidation resistance of ultraflat Cu surfaces.
北医三院乔杰、赵扬玉团队在《新英格兰医学杂志》发表孕产妇新冠肺炎患者的临床特征研究结果
2020年4月18日,北京大学第三医院乔杰、赵扬玉教授团队在国际顶级医学期刊《新英格兰医学杂志》在线以correspondence形式发表了题为“Clinicalcharacteristics of pregnant women infected with Coronavirus