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They consist of seven courses, six of which are offered at both the Standard Level (SL) and Higher Level (HL): Chemistry, Biology, Physics, Design Technology, and, as of August 2024, Computer Science (previously a group 5 elective course) is offered as part of the Group 4 subjects. [1]
Arachidonic acid (AA, sometimes ARA) is a polyunsaturated omega−6 fatty acid 20:4(ω−6), or 20:4(5,8,11,14). [2] [3] If its precursors or diet contains linoleic acid it is formed by biosynthesis and can be deposited in animal fats. It is a precursor in the formation of leukotrienes, prostaglandins, and thromboxanes. [4]
5321 18783 Ensembl ENSG00000116711 ENSMUSG00000056220 UniProt P47712 P47713 RefSeq (mRNA) NM_001311193 NM_024420 NM_008869 NM_001305632 RefSeq (protein) NP_001298122 NP_077734 NP_001292561 NP_032895 Location (UCSC) Chr 1: 186.83 – 186.99 Mb Chr 1: 149.71 – 149.84 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Cytosolic phospholipase A 2 is an enzyme that in humans is encoded by ...
In the periodic table of the elements, each column is a group. In chemistry, a group (also known as a family) [1] is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table; the 14 f-block columns, between groups 2 and 3, are not numbered.
The chemistry of group 4 elements is dominated by the group oxidation state. Zirconium and hafnium are in particular extremely similar, with the most salient differences being physical rather than chemical (melting and boiling points of compounds and their solubility in solvents). [29]
Together with its conjugate base superoxide, hydroperoxyl is an important reactive oxygen species.Unlike • O − 2, which has reducing properties, HO • 2 can act as an oxidant in a number of biologically important reactions, such as the abstraction of hydrogen atoms from tocopherol and polyunstaturated fatty acids in the lipid bilayer.
Lysophosphatidylethanolamine (LPE) is composed of an ethanolamine head group and glycerophosphoric acid with a various fatty acid located sn-1 position. The fatty acid may be saturated or unsaturated acyl. [citation needed] Chemical name: 1-Acyl-sn-glycero-3-phospho(2-aminoethanol) CAS number: 95046-40-5
In any case, the value of the electron affinity of a solid substance is very different from the chemistry and atomic physics electron affinity value for an atom of the same substance in gas phase. For example, a silicon crystal surface has electron affinity 4.05 eV, whereas an isolated silicon atom has electron affinity 1.39 eV.