ScienceDirect is the world's leading source for scientific, technical, and medical research. Explore journals, books and articles.
Chemical Science System of knowledge and the methods you use to find that knowledge Matter Anything that has mass and takes up space Compound Substances made of 2 or more elements that are chemically combined Mixture 2 or more substances physically combined關於...
(@760), disrupts the class, and then repeats his misunderstanding. In person, that student would be dismissed. Let me know, with some respect, if you have any further questions.Fact brief - Does manmade CO2 have any detectable fingerprint?rkcannon at 01:29 AM on 26 November, 2024 Please...
阴茎海绵体成纤维细胞介导阴茎勃起 (导读 阿金)阴茎勃起由海绵体介导,但其中的调控机制仍未完全阐释。本研究表明海绵体中血管周围成纤维细胞通过减少去甲肾上腺素支持血管舒张,对阴茎血液流动的影响则取决于成纤维细胞的数量,后者受到勃起活动的调节。勃起动态改变成纤维细胞...
近日,一场有趣有料有看点的科学展在江苏省苏州实验中学国际部举行。同学们将诸多的学科知识融合在一起,针对自己感兴趣的科学问题进行了大胆假设,查找学习相关资料,展开了详细的研究,并最终提交了一份图文并茂的答卷。 2024科学展现场 已关注关注重播分享赞关闭观看更多...
Educational videos are increasingly used to let students prepare lesson material at home prior to in-class activities in flipped classrooms. The main chall
Apart from the optical, electromagnetic and thermal metamaterials, a class of mechanical metamaterials (MMs) through the construction of periodic units comprising tailored geometry and pattern, giving unique mechanical properties, i.e., negative stiffness [2–5], negative Poisson’s ratio [5–11], ...
Awe-inspiring science reporting, technology news, and DIY projects. Skunks to space robots, primates to climates. That's Popular Science, 152 years strong.
Normal cells contain MHC class I molecules, which act as a ligand for inhibitory response in NK cells. However, abnormal cells, including those infected by SARS-CoV-2, are probably be killed due to the lack of MHC class I [127]. Ligands expression of the activating receptors must be ...
With the goal of preparing our students for this level of work in mind, our first week of class with grade 8 was 'lab safety week'. Students discussed with their teachers the precautions that should be taken when working with unknown ...