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The United States National Chemistry Olympiad (or USNCO) is a contest held by the American Chemical Society (ACS) used to select the four-student team that represents the United States at the International Chemistry Olympiad (IChO). Each local ACS section selects 10 students (or more for larger ACS sections) to take the USNCO National Exam.
Reliable chemical reactions Searchable experimental procedures Peer reviewed "OrgSyn search". PDB PDBe Protein Data Bank in Europe EMBL-EBI: has some chemicals as well as proteins "PDBe". PATENTSCOPE: WIPO "PATENTSCOPE". 16,000,000 PDB RSCB Protein Data Bank "PDB". 166,891 PharmGKB Shriram Center for Bioengineering and Chemical Engineering ...
It also contains 237 million bioactivity test results from 1.25 million biological assays, covering >10,000 target protein sequences. [ 4 ] As of 2020, with data integration from over 100 new sources, PubChem contains more than 293 million depositor-provided substance descriptions, 111 million unique chemical structures, and 271 million ...
Iodine-125 is a radioactive isotope of iodine that decays by electron capture with a physical half-life of 60.14 days. The biological half-life in normal individuals for iodine (125 I) human albumin has been reported to be approximately 14 days. Its radioactivity is excreted almost exclusively via the kidneys.
The next 15 questions, numbered 101-115, were called 'relationship analysis questions'. The SAT Subject Test in Chemistry was currently the only SAT that incorporates the relationship analysis questions. Relationship Analysis Questions required the student to identify the truth value of two statements. If both statements were true, the student ...
Chemical Markup Language (CML) is an open standard for representing molecular and other chemical data. The open source project includes XML Schema, source code for parsing and working with CML data, and an active community. The articles Tools for Working with Chemical Markup Language and XML for Chemistry and Biosciences discusses CML in more ...
In 1874, a group of American chemists gathered at the Joseph Priestley House to mark the 100th anniversary of Priestley's discovery of oxygen.Although there was an American scientific society at that time (the American Association for the Advancement of Science, founded in 1848), the growth of chemistry in the U.S. prompted those assembled to consider founding a new society that would focus ...
The rate of a reaction is the concentration of substrate disappearing (or product produced) per unit time (mol L −1 s −1).. The % purity is 100% × (specific activity of enzyme sample / specific activity of pure enzyme).