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'''PubChem''' adalah [[database]] [[molekul]] [[kimia]] dan aktivitasnya terhadap penelitian biologi. Sistem ini dipelihara oleh [[:en:National Center for Biotechnology Information|National Center for Biotechnology Information]] (NCBI), suatu komponen pada [[:en:National Library of Medicine|National Library of Medicine]], yang merupakan bagian dari [[National Institutes of Health]] (NIH) [[Amerika Serikat]]. PubChem dapat diakses secara gratis melalui suatu [[:en:web user interface|web user interface]]. Jutaan struktur senyawa dan dataset pemeriannya dapat didownload secara gratis melalui [http://pubchem.ncbi.nlm.nih.gov/pc_fetch/pc_fetch-help.html FTP]. PubChem memuat pemerian bahan-bahan dan molekul kecil yang terbentuk kurang dari 1000 atom dan 1000 ikatan. Lebih dari 80 vendor database berkontribusi pada database PubChem yang terus bertumbuh.<ref>{{Cite web|url = http://pubchem.ncbi.nlm.nih.gov/sources/sources.cgi|title = PubChem Source Information|work = The PubChem Project|location = USA|publisher = National Center for Biotechnology Information}}</ref>
 
== Database ==
* Bahan, 163,5 juta entri<ref>{{Cite web|url = http://www.ncbi.nlm.nih.gov/sites/entrez?term=all%5Bfilt%5D&cmd=search&db=pcsubstance|title = all[filt&#93; - PubChem Substance Results|work = The PubChem Project|location = USA|publisher = National Center for Biotechnology Information|accessdate = 29 September 2014}}</ref> (up from 75 million entries in Jan 2011<ref>{{Cite web|url = http://www.ncbi.nlm.nih.gov/sites/entrez?term=all%5Bfilt%5D&cmd=search&db=pcsubstance|title = all[filt&#93; - PubChem Substance Results|work = The PubChem Project|location = USA|publisher = National Center for Biotechnology Information|accessdate = 7 January 2011}}</ref>), contains also mixtures, [[extract]]s, [[complex (chemistry)|complexes]] and uncharacterized substances.
* BioAssay, hasil-hasil [[:en:bioactivity|bioaktivitas]] dari 6059 program [[:en:high-throughput screening|high-throughput screening]] dengan beberapa juta nilai<ref>{{Cite web|url = http://www.ncbi.nlm.nih.gov/sites/entrez?term=all%5Bfilt%5D&cmd=search&db=pcassay|title = all[filt&#93; - PubChem BioAssay Results|work = The PubChem Project|location = USA|publisher = National Center for Biotechnology Information|accessdate = 29 September 2014}}</ref> (meningkat dari 1644 pada Jan 2011<ref>{{Cite web|url = http://www.ncbi.nlm.nih.gov/sites/entrez?term=all%5Bfilt%5D&cmd=search&db=pcassay|title = all[filt&#93; - PubChem BioAssay Results|work = The PubChem Project|location = USA|publisher = National Center for Biotechnology Information|accessdate = 7 January 2011}}</ref>).
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== Searching ==
 
== Pencarian ==
Searching the databases is possible for a broad range of properties including chemical structure, name fragments, [[chemical formula]], [[Molecular mass|molecular weight]], [[XLogP]], and [[hydrogen bond]] donor and acceptor count.
 
Pencarian dalam database dimungkinkan untuk rentang luas sifat-sifat termasuk struktur kimia, potongan nama, [[rumus kimia]], [[berat molekul]], [[XLogP]], dan hitungan donor serta akseptor [[ikatan hidrogen]].
PubChem contains its own online [[molecule editor]] with [[Simplified molecular input line entry specification|SMILES]]/SMARTS and [[International Chemical Identifier|InChI]] support that allows the import and export of all common [[chemical file format]]s to search for structures and fragments.
 
PubChem contains its ownmempunyai online [[molecule editor]] withsendiri dengan dukungan untuk [[Simplified molecular input line entry specification|SMILES]]/SMARTS anddan [[International Chemical Identifier|InChI]] support that allows the importyang andmengizinkan exportimpor ofdan allekspor commonsemua [[chemical file format]]s toumum searchuntuk forpencarian structuresstruktur anddan fragmentsfragmen.
Each hit provides information about synonyms, chemical properties, chemical structure including SMILES and InChI strings, bioactivity, and links to structurally related compounds and other NCBI databases like [[PubMed]].
 
<!--Each hit provides information about synonyms, chemical properties, chemical structure including SMILES and InChI strings, bioactivity, and links to structurally related compounds and other NCBI databases like [[PubMed]].
 
In the text search form the database fields can be searched by adding the field name in square brackets to the search term. A numeric range is represented by two numbers separated by a colon. The search terms and field names are case-insensitive. Parentheses and the [[logical operator]]s AND, OR, and NOT can be used. AND is assumed if no operator is used.
 
Soon after PubChem's creation, the [[American Chemical Society]] lobbied [[Congress of the United States|U.S. Congress]] to restrict the operation of PubChem, which they asserted competes with their [[Chemical Abstracts Service]].<ref>{{Cite web|url = http://osc.universityofcalifornia.edu/news/acs_pubchem.html|title = PubChem and the American Chemical Society|work = Reshaping Scholarly Communication|location = USA|publisher = University of California}}</ref>
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== DatabaseBidang-bidang fieldsdatabase ==
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