Base de dados : MEDLINE
Pesquisa : H01.181 [Categoria DeCS]
Referências encontradas : 74646 [refinar]
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  1 / 74646 MEDLINE  
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PMID:28644869
Autor:Kandel KP; Neupane BB; Giri B
Endereço:Department of Chemistry, Birendra Multiple Campus, Tribhuvan University, Chitwan, Nepal.
Título:Status of chemistry lab safety in Nepal.
Fonte:PLoS One; 12(6):e0179104, 2017.
ISSN:1932-6203
País de publicação:United States
Idioma:eng
Resumo:Chemistry labs can become a dangerous environment for students as the lab exercises involve hazardous chemicals, glassware, and equipment. Approximately one hundred thousand students take chemistry laboratory classes annually in Nepal. We conducted a survey on chemical lab safety issues across Nepal. In this paper, we assess the safety policy and equipment, protocols and procedures followed, and waste disposal in chemistry teaching labs. Significant population of the respondents believed that there is no monitoring of the lab safety in their lab (p<0.001). Even though many labs do not allow food and beverages inside lab and have first aid kits, they lack some basic safety equipment. There is no institutional mechanism to dispose lab waste and chemical waste is disposed haphazardly. Majority of the respondents believed that the safety training should be a part of educational training (p = 0.001) and they would benefit from short course and/or workshop on lab safety (p<0.001).
Tipo de publicação: JOURNAL ARTICLE


  2 / 74646 MEDLINE  
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PMID:27969062
Autor:Heringa J; Li W; Madura J
Endereço:VU University, Amsterdam, The Netherlands.
Título:Editorial.
Fonte:Comput Biol Chem; 64:vii-viii, 2016 10.
ISSN:1476-928X
País de publicação:England
Idioma:eng
Tipo de publicação: EDITORIAL; HISTORICAL ARTICLE


  3 / 74646 MEDLINE  
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PMID:28447653
Autor:Peplow M
Título:The next big hit in molecule Hollywood.
Fonte:Nature; 544(7651):408-410, 2017 04 26.
ISSN:1476-4687
País de publicação:England
Idioma:eng
Tipo de publicação: JOURNAL ARTICLE


  4 / 74646 MEDLINE  
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PMID:28118471
Autor:Pursell DP; Forlemu NY; Anagho LE
Título:Mathematics Competency for Beginning Chemistry Students Through Dimensional Analysis.
Fonte:J Nurs Educ; 56(1):22-26, 2017 Jan 01.
ISSN:1938-2421
País de publicação:United States
Idioma:eng
Resumo:BACKGROUND: Mathematics competency in nursing education and practice may be addressed by an instructional variation of the traditional dimensional analysis technique typically presented in beginning chemistry courses. METHOD: The authors studied 73 beginning chemistry students using the typical dimensional analysis technique and the variation technique. Student quantitative problem-solving performance was evaluated. RESULTS: Students using the variation technique scored significantly better (18.3 of 20 points, p < .0001) on the final examination quantitative titration problem than those who used the typical technique (10.9 of 20 points). American Chemical Society examination scores and in-house assessment indicate that better performing beginning chemistry students were more likely to use the variation technique rather than the typical technique. CONCLUSION: The variation technique may be useful as an alternative instructional approach to enhance beginning chemistry students' mathematics competency and problem-solving ability in both education and practice. [J Nurs Educ. 2017;56(1):22-26.].
Tipo de publicação: JOURNAL ARTICLE


  5 / 74646 MEDLINE  
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PMID:28470196
Autor:Gaunt M; Williamson P
Endereço:Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, UK.
Título:Organic chemistry: Nickel steps towards selectivity.
Fonte:Nature; 545(7652):35-36, 2017 05 03.
ISSN:1476-4687
País de publicação:England
Idioma:eng
Tipo de publicação: JOURNAL ARTICLE; COMMENT
Nome de substância:7OV03QG267 (Nickel)


  6 / 74646 MEDLINE  
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PMID:28475312
Autor:Krallinger M; Rabal O; Lourenço A; Oyarzabal J; Valencia A
Endereço:Structural Computational Biology Group, Structural Biology and BioComputing Programme, Spanish National Cancer Research Centre , C/Melchor Fernández Almagro 3, Madrid E-28029, Spain.
Título:Information Retrieval and Text Mining Technologies for Chemistry.
Fonte:Chem Rev; 117(12):7673-7761, 2017 Jun 28.
ISSN:1520-6890
País de publicação:United States
Idioma:eng
Resumo:Efficient access to chemical information contained in scientific literature, patents, technical reports, or the web is a pressing need shared by researchers and patent attorneys from different chemical disciplines. Retrieval of important chemical information in most cases starts with finding relevant documents for a particular chemical compound or family. Targeted retrieval of chemical documents is closely connected to the automatic recognition of chemical entities in the text, which commonly involves the extraction of the entire list of chemicals mentioned in a document, including any associated information. In this Review, we provide a comprehensive and in-depth description of fundamental concepts, technical implementations, and current technologies for meeting these information demands. A strong focus is placed on community challenges addressing systems performance, more particularly CHEMDNER and CHEMDNER patents tasks of BioCreative IV and V, respectively. Considering the growing interest in the construction of automatically annotated chemical knowledge bases that integrate chemical information and biological data, cheminformatics approaches for mapping the extracted chemical names into chemical structures and their subsequent annotation together with text mining applications for linking chemistry with biological information are also presented. Finally, future trends and current challenges are highlighted as a roadmap proposal for research in this emerging field.
Tipo de publicação: JOURNAL ARTICLE; REVIEW


  7 / 74646 MEDLINE  
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PMID:28357435
Autor:Feng Y; Khokhar S; Davis RA
Endereço:Griffith Institute for Drug Discovery, Griffith University, Brisbane, QLD 4111, Australia. r.davis@griffith.edu.au.
Título:Crinoids: ancient organisms, modern chemistry.
Fonte:Nat Prod Rep; 34(6):571-584, 2017 Jun 07.
ISSN:1460-4752
País de publicação:England
Idioma:eng
Resumo:Covering: 1877 to 2017The ancestors of present-day crinoids are thought to be some of the earliest echinoderms, with fossil records dating back to the early Paleozoic Era (Ordovician Period, 505-440 million years ago). Their bright colours have been noted for over 100 years, and are attributed to a series of polyketide-derived pigments. Some crinoid metabolites display a range of biological activities, including cytotoxicity and fish anti-feedant activity. This review is divided into two parts. Part 1 is encyclopedic in scope, collating information on the >50 known metabolites isolated from crinoids, including their taxonomic source, collection location, chemical structure and biological activities. During the compilation of this data, two distinct themes emerged. Firstly, there is little variation in the class of metabolites produced by crinoids, irrespective of their species or geographic origin. Secondly, the complete and unambiguous assignment of crinoid metabolite structures has been, in many cases, a difficult task. This has been due to a lack of spectroscopic technology available in the past, the presence of proton-poor chemical structures, or both. Thus, Part 2 provides a critical discussion of crinoid chemistry, including the biosynthetic origin of crinoid pigments, as well as the pitfalls and solutions experienced by ourselves and other chemists when elucidating the chemical structures of crinoid metabolites.
Tipo de publicação: JOURNAL ARTICLE; REVIEW


  8 / 74646 MEDLINE  
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PMID:28371105
Autor:Gautier A; Rodriguez R
Endereço:Ecole Normale Supérieure, 24 rue Lhomond, 75005, Paris, France.
Título:PSL Chemical Biology Symposia First 2016 Edition: When Chemistry and Biology Share the Language of Discovery.
Fonte:Chembiochem; 18(10):883-887, 2017 May 18.
ISSN:1439-7633
País de publicação:Germany
Idioma:eng
Resumo:Chemical biology, the science of understanding biological processes at the molecular level, has grown exponentially with the development of chemical strategies to manipulate and quantify biology with unprecedented precision. Recent advances presented at the Université Paris Sciences et Lettres symposium are discussed.
Tipo de publicação: JOURNAL ARTICLE
Nome de substância:0 (Molecular Probes)


  9 / 74646 MEDLINE  
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PMID:28001318
Autor:Patel HA; Byun J; Yavuz CT
Endereço:Graduate School of Energy, Environment, Water and Sustainability, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Korea.
Título:Carbon Dioxide Capture Adsorbents: Chemistry and Methods.
Fonte:ChemSusChem; 10(7):1303-1317, 2017 Apr 10.
ISSN:1864-564X
País de publicação:Germany
Idioma:eng
Resumo:Excess carbon dioxide (CO ) emissions and their inevitable consequences continue to stimulate hard debate and awareness in both academic and public spaces, despite the widespread lack of understanding on what really is needed to capture and store the unwanted CO . Of the entire carbon capture and storage (CCS) operation, capture is the most costly process, consisting of nearly 70 % of the price tag. In this tutorial review, CO capture science and technology based on adsorbents are described and evaluated in the context of chemistry and methods, after briefly introducing the current status of CO emissions. An effective sorbent design is suggested, whereby six checkpoints are expected to be met: cost, capacity, selectivity, stability, recyclability, and fast kinetics.
Tipo de publicação: JOURNAL ARTICLE; REVIEW
Nome de substância:142M471B3J (Carbon Dioxide)


  10 / 74646 MEDLINE  
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PMID:28417938
Autor:Prabhath MRR; Williams L; Bhat SV; Sharma P
Endereço:School of Chemistry, Joseph Banks Laboratories, University of Lincoln, Lincoln LN6 7DL, UK. ranga_prabhath@yahoo.com.
Título:Recent Advances in Cyanamide Chemistry: Synthesis and Applications.
Fonte:Molecules; 22(4), 2017 Apr 12.
ISSN:1420-3049
País de publicação:Switzerland
Idioma:eng
Resumo:The application of alkyl and aryl substituted cyanamides in synthetic chemistry has diversified multi-fold in recent years. In this review, we discuss recent advances (since 2012) in the chemistry of cyanamides and detail their application in cycloaddition chemistry, aminocyanation reactions, as well as electrophilic cyanide-transfer agents and their unique radical and coordination chemistry.
Tipo de publicação: JOURNAL ARTICLE; REVIEW
Nome de substância:0 (Metals); 420-04-2 (Cyanamide)



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