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Vor einem Tag · 1963 - Jürg Waser introduced restrained least square method, also known as regularized least squares, for crystallographic structure fitting. [162] 1964 - Dorothy Hodgkin won the Nobel Prize for Chemistry "for her determinations by X-ray techniques of the structures of important biochemical substances."
Vor einem Tag · Definition and applicable elements Unless otherwise noted, this article describes the most stable form of an element in ambient conditions. [b] While arsenic (here sealed in a container to prevent tarnishing) has a shiny appearance and is a reasonable conductor of heat and electricity, it is soft and brittle and its chemistry is predominately nonmetallic. Nonmetallic chemical elements are ...
Vor einem Tag · Nitrile sind eine Gruppe chemischer Verbindungen mit der allgemeinen Formel R–C≡N. Die charakteristische funktionelle Gruppe der Nitrile ist das dreifach gebundene Stickstoffatom ≡N beziehungsweise die Nitril- oder Cyanogruppe –C≡N. Die Stoffgruppe leitet sich vom Cyanwasserstoff (Blausäure, H–C≡N) ab. Ein Beispiel hierfür ist ...
Vor 3 Stunden · Boston University. / 42.34889°N 71.10028°W / 42.34889; -71.10028. Boston University ( BU) is a private research university in Boston, Massachusetts. BU was founded in 1839 by a group of Boston Methodists with its original campus in Newbury, Vermont, before being chartered in Boston in 1869.
Vor einem Tag · Addiction experts in psychiatry, chemistry, pharmacology, forensic science, epidemiology, and the police and legal services engaged in delphic analysis regarding 20 popular recreational drugs. LSD was ranked 14th in dependence, 15th in physical harm, and 13th in social harm.
Vor einem Tag · Website. cia .gov. The Central Intelligence Agency ( CIA) / ˌsiː.aɪˈeɪ /, known historically as the Company, [6] is a civilian foreign intelligence service of the federal government of the United States tasked with gathering, processing, and analyzing national security information from around the world, primarily through the use of human ...
Vor 3 Stunden · Sustainability is a social goal for people to co-exist on Earth over a long time. Definitions of this term are disputed and have varied with literature, context, and time. [2] [1] Sustainability usually has three dimensions (or pillars): environmental, economic, and social. [1]
