instance_of mdl chime
RELX ___MASK75___ ( known as Reed Elsevier between 1992 and ___MASK7___ 2015 ) is a multinational information and analytics ___MASK11___ based in London , in the United Kingdom . It operates in four market segments : scientific , technical and medical ; risk and business analytics ; legal ; and exhibitions . Accelrys is a ___MASK57___ company headquartered in the United States , with representation in Europe and Asia . It provides ___MASK57___ for chemical , materials and bioscience research for the pharmaceutical , biotechnology , consumer packaged goods , aerospace , energy and chemical industries . Molecular graphics ( MG ) is the discipline and ___MASK40___ of studying molecules and their properties through graphical representation . IUPAC limits the definition to representations on a " graphical display device ". Ever since Dalton ' s atoms and Kekulé ' s benzene , there has been a rich ___MASK18___ of hand - drawn atoms and molecules , and these representations have had an important influence on modern molecular graphics . This article concentrates on the use of computers to create molecular graphics . Note , however , that many molecular graphics programs and systems have close coupling between the graphics and editing commands or calculations such as in molecular modelling . Elsevier is one of the world ' s major providers of scientific , technical , and medical ___MASK48___ , and a ___MASK47___ originally established in 1880 . It is now a part of the RELX Group , known until 2015 as Reed Elsevier . Its products include journals such as " The Lancet " and " Cell ", the ScienceDirect collection of electronic journals , the " Trends " and " Current Opinion " series of journals , and the online citation database Scopus . The ___MASK71___ ___MASK19___ Bank ( PDB ) is a crystallographic database for the three - dimensional structural ___MASK19___ of large biological molecules , such as proteins and nucleic acids . The ___MASK19___ , typically obtained by X - ray crystallography , NMR spectroscopy , or , increasingly , cryo - electron microscopy , and submitted by biologists and biochemists from around the world , are freely accessible on the Internet via the websites of its member organisations ( PDBe , PDBj , and RCSB ). The PDB is overseen by an organization called the Worldwide ___MASK71___ ___MASK19___ Bank , wwPDB . The Lancet is a weekly ___MASK73___ - reviewed general medical ___MASK50___ . It is one of the world ' s oldest and best known general medical journals . Combinatorial chemistry comprises ___MASK59___ synthetic methods that make it possible to prepare a large number ( tens to thousands or even millions ) of compounds in a ___MASK66___ process . These compound libraries can be made as mixtures , sets of individual compounds or ___MASK59___ structures generated by computer ___MASK57___ . Combinatorial chemistry can be used for the synthesis of small molecules and for peptides . RasMol is a ___MASK13___ program written for molecular graphics visualization intended and used mainly to depict and explore biological macromolecule structures , such as those found in the Protein ___MASK19___ Bank . It was originally developed by Roger Sayle in the early 1990s . Symyx Technologies , Inc . was a ___MASK11___ that specialized in informatics and ___MASK25___ products . Symyx provided ___MASK57___ solutions for scientific research , including Enterprise Laboratory Notebooks and products for combinatorial chemistry . The ___MASK57___ part of the business became part of Accelrys , Inc . in 2010 . Symyx also offered laboratory robotics systems for performing automated chemical research , which on 2010 , was spun out as Freeslate , Inc . A web browser ( commonly referred to as a browser ) is a ___MASK57___ application for retrieving , presenting and traversing information resources on the World Wide Web . An " information resource " is identified by a Uniform Resource Identifier ( URI / URL ) that may be a web page , image , video or other piece of content . Hyperlinks present in resources enable users easily to navigate their browsers to related resources . A ___MASK3___ is an electrically neutral group of two or more atoms held together by chemical bonds . Molecules are distinguished from ions by their lack of electrical charge . However , in quantum physics , organic chemistry , and biochemistry , the term " ___MASK3___ " is often used less strictly , also being applied to polyatomic ions . Scopus is a ___MASK62___ containing abstracts and citations for academic journal articles . It covers nearly 22 , 000 titles from over 5 , 000 publishers , of which 20 , 000 are peer - reviewed journals in the scientific , technical , medical , and social sciences ( including arts and humanities ). It is owned by Elsevier and is available online by subscription . Searches in Scopus also incorporate searches of patent databases . ScienceDirect is a ___MASK8___ which provides subscription - based access to a large ___MASK45___ of scientific and medical research . It hosts over 12 million pieces of content from 3 , 500 academic journals and 34 , 000 e - books . The journals are grouped into four main sections : " Physical Sciences and ___MASK15___ ", " Life Sciences ", " Health Sciences ", and " Social Sciences and Humanities ". Article abstracts are freely available , but access to their full texts ( in PDF and , for newer publications , also HTML ) generally require a subscription or pay - per - view purchase . MDL Chime is a free plugin used by web browsers to display the ___MASK91___ - dimensional structures of molecules . It is ___MASK16___ of the ISIS product line acquired by Symyx Technologies from scientific publisher Elsevier in October 2007 . It is based on the RasMol code . Chime is used by a wide range of biochemistry web sites for the visualization of macromolecules . Many of these sites are linked to the World Index of Molecular Visualization Resources MolVisIndex . Org . Chime was also used until 2006 at the ___MASK71___ ___MASK19___ Bank to examine structures stored there . Although available in 1996 in both Windows 95 and Mac OS versions for both Netscape and Internet Explorer browsers , development of Chime did not follow the move to Mac OS X for the Mac and support for Windows - based browsers other than Internet Explorer was limited ( although it works well in Mozilla Firefox ) . One significant feature added in 1997 was the ability to display spectroscopic ___MASK19___ in the form of the IUPAC JCAMP - DX protocols . Apart from this , most updates since then were for the installation package to follow the development of Windows and Internet Explorer . Chime largely has been superseded by Jmol . Jmol is a non - proprietary open source Java molecular visualization application / applet that has maintained most Chime command compatibility while adding features . A feature of Chime which is not yet reproduced with Jmol is the calculation of electrostatic or hydrophobic potential for use in coloring molecular surfaces . Instead , Jmol relies on this ___MASK19___ being provided by other calculation packages . Chime involves some level of calculation of these properties . Now Chime is owned by Symyx and is found at Accelrys , and has been merged to Discovery Studio .