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In the Adler method (ca. 1964) an aldehyde and pyrrole are reacted in refluxing propionic acid (141°C) for 30 min in an open beaker, followed by isolation of the porphyrin crystals upon cooling [2–5]. The Adler method affords ~20% yields, is easy to implement, and has made possible the synthesis of an impressive number of meso-substituted ...
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A low‐pressure magnetically confined argon arc discharge was used in a mass spectrometer ion source to study low‐energy (0–100 eV) sputtering of polycrystalline copper. Target bombarding ion current densities ranged from 60–200 μA/cm 2.Neutral particles were studied. Cu atoms and Cu 2 molecules were detected. The mass ratio of …
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The Science Citation Index Expanded – previously entitled Science Citation Index – is a citation index originally produced by the Institute for Scientific Information (ISI) and created by Eugene Garfield. It was officially launched in 1964 and is now owned by Clarivate (previously the Intellectual Property and Science business of Thomson Reuters ).
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This option allows users to search by Publication, Volume and Page Selecting this option will search the current publication in context. Book Search tips Selecting this option will search all publications across the Scitation platform Selecting this option will search all publications for the Publisher/Society in context
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5 hours agoThe Hayabusa2 spacecraft investigated the near-Earth C-type asteroid (162173) Ryugu. Ryugu has a low-albedo surface consisting of hydrous minerals and carbonaceous materials ( 6 ). Hayabusa2 collected ~5 g of samples from Ryugu's surface and delivered them to Earth on 6 December 2020 ( 7 ). Unlike meteorites, these samples …
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Eugene Garfield, Ph.D. (1925-2017) Eugene Garfield, founder of the Institute for Scientific Information and The Scientist, passed away at age 91. Research! America -- Eugene Garfield Economic Impact of Medical and Health Research Award. Past Board Member Research! America.
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A 2.91-billion base pair (bp) consensus sequence of the euchromatic portion of the human genome was generated by the whole-genome shotgun sequencing method. The 14.8-billion bp DNA sequence was generated over 9 months from 27,271,853 high-quality sequence reads (5.11-fold coverage of the genome) fro …
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Indian Statistical Institute (ISI) is a higher education and research institute which is recognized as an Institute of National Importance by the 1959 act of the Indian parliament. It grew out of the Statistical Laboratory set up by Prasanta Chandra Mahalanobis in Presidency College, Kolkata.Established in 1931, this unique institution of India is one of …
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The United States over the past century has seen a dramatic shift in attitudes toward tobacco, which, in turn, has influenced the increase and decrease of cigarette consumption and smoking-related cancer deaths ().This article reviews some of the various forces that have helped change the public image of smoking, with a particular focus on …
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Web of Science. The Master Journal List is an invaluable tool to help you to find the right journal for your needs across multiple indices hosted on the Web of Science platform. Spanning all disciplines and regions, Web of Science Core Collection is at the heart of the Web of Science platform. Curated with care by an expert team of in-house ...
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A Sator Square (in SATOR-form), on a wall in the medieval fortress town of Oppède-le-Vieux, France. A word square is a type of acrostic. It consists of a set of words written out in a square grid, such that the same words can be read both horizontally and vertically. The number of words, which is equal to the number of letters in each word, is ...
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FoEh,Yusuf Ali Published in : International Journal of Social Science And Human Research. Tracing the exact location of failures in underground optical networks using LSTM deep learning model Authors: Owusu Nyarko-Boateng, Adebayo F Adekoya, Benjamin A Weyori Published in : Indian Journal of Science and Technology.
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Another social science looks at itself. Experimental economists have joined the reproducibility discussion by replicating selected published experiments from two top-tier journals in economics. Camerer et al. found that two-thirds of the 18 studies examined yielded replicable estimates of effect size and direction.
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