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Research papers from more than 55 disciplines Free & Subscription No Elsevier: HAL: Multidisciplinary: 760,000 (2,000,000 metadata) [14] An open-access database for French researchers. Organized into institution and domain portals. Free Yes CNRS's Centre pour la Communication Scientifique Directe (CCSD) RePEc: Research Papers in Economics [15 ...
Google Scholar is a freely accessible web search engine that indexes the full text or metadata of scholarly literature across an array of publishing formats and disciplines. . Released in beta in November 2004, the Google Scholar index includes peer-reviewed online academic journals and books, conference papers, theses and dissertations, preprints, abstracts, technical reports, and other ...
Research Papers in Economics (RePEc) is a collaborative effort of hundreds of volunteers in many countries to enhance the dissemination of research in economics. The heart of the project is a decentralized database of working papers , preprints , journal articles, and software components. [ 1 ]
Importance: This massive text by outstanding research workers begins with simple systems and proceeds logically to the more complex phenomena of physical chemistry. The original literature is cited extensively, making the work useful as a reference as well as a textbook. Many topics of current research are treated.
Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...
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In the first step of this cycle, the SAM-dependent methylases (EC 2.1.1) that use SAM as a substrate produce S-adenosyl homocysteine as a product. [4] S -Adenosyl homocysteine is a strong negative regulator of nearly all SAM-dependent methylases despite their biological diversity.
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