比菲尔德学术搜索引擎
超过3.4亿件科学文献来自超过11000免费来源。BASE是世界性大型搜搜引擎，存储来自互联网上免费的开放获取科学文献。BASE is one of the world\'s most voluminous search engines especially for academic web resources. BASE provides more than 340 million documents from more than 11,000 content providers. You can access the full texts of about 60% of the indexed documents for free (Open Access). BASE is operated by Bielefeld University Library.
点击进入 - 2023-11-03 - 收藏
PDF SEARCH ENGINE - PDF,DOC,PPT,Ebook search ENGINE
FREE PDF SEARCH ENGINE. support all pdf,DOC,PPT,Ebook! free pdf download. You can search all kind of documents!
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chemBlink官网
chemBlink provides a free database of chemicals from around the World, searchable for product identifications, CAS numbers, SDS, formulas, suppliers and more. Contact us today.
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SCIRP Open Access
Scientific Research Publishing is an academic publisher with more than 200 open access journal in the areas of science, technology and medicine. It also publishes academic books and conference proceedings.
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Thèses官网
Moteur de recherche des thèses françaises, theses.fr propose l’accès aux thèses de doctorat soutenues ou en préparation. Grâce à son moteur de recherche et sa navigation par facette, l’interface donne accès aux données des thèses : titre, docteur, disciplines, directeurs, établissements de soutenance, écoles doctorales, partenaires de recherche, date de soutenance et éventuellement au texte intégral.
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DART-Europe官网
Portal for open access research theses. DART-Europe is a partnership of research libraries and library consortia who are working together to improve global access to European research theses. The DART-Europe partners help to provide researchers with a single European Portal for the discovery of Electronic Theses and Dissertations (ETDs).
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化工专业知识服务系统
化工专业知识服务系统www.chem.cnChrome浏览器登录会出现闪烁问题，解决方案如下：1. 在chrome浏览器的地址栏里输入： chrome://flags/2. 在跳转的页面搜索框中输入语句： Cookies without SameSite must be secure，3. 在搜索结果页，将默认值default通过下拉箭头改为disable，4. 点击右下角的Relaunch。
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