Encyclopedia of Chemistry

that exhibit selectivity toward chemically different reagents. Some authors use the term chemospecificity for 100 percent chemos ...

chloroplast The double-membrane organelle of eukaryotic photosynthesis; contains enzymes and pig- ments that perform photosynthe ...

right-handed circularly polarized light by a material as a function of the wavelength. Most biological molecules, including PROT ...

[4FE-4S], HIPIP, IRON-SULFUR CLUSTER, FEMO COFAC- TOR, FERREDOXIN, FERRITIN, METALLOTHIONEIN, NITROGENASE, and RIESKE IRON-SULFU ...

larger than molecular scale. However, they do not set- tle out. colloidal bismuth subcitrate(CBS) SeeDE-NOL. combination reactio ...

complementary DNA(cDNA) A laboratory-pro- duced DNA section that is created by extracting a sin- gle-stranded RNA from an organi ...

when iodide and iodate ions react to form elemental iodine. The reverse of DISPROPORTIONATION. computational chemistry A discipl ...

The Power of Chemistry: Natural versus Synthetic Compounds by Theresa Beaty, Ph.D. Indigo is the dye that makes the “blue” in bl ...

example, the ground electronic configuration of the oxygen molecule (O 2 ) is 1 σg^2 , 1 σu^2 , 2 σg^2 , 2 σu^2 , 1 πu^4 , 3 σg^ ...

atoms in a MOLECULAR ENTITY(omitting any distinc- tion from their spatial arrangement). consumer Any organism that ingests matte ...

coordinate covalent bond A bond between two atoms in which the shared electrons are contributed by only one of the atoms. coordi ...

moved to St. Louis, she joined him as a research asso- ciate. Gerty Cori was made professor of biochemistry in 1947. Jointly, th ...

It constitutes the skeleton C 19 H 22 N 4 upon which various B 12 vitamins, COFACTORs, and derivatives are based. corrosion Oxid ...

excess acidity because it gives a measure of the differ- ence between the acidity of a solution and that of an ideal solution of ...

three or more binding sites held together by COVALENT BONDs, and which defines a molecular cavity in such a way as to bind (and ...

crystallization The process of forming crystals from the melt or solution. crystal systems The six (or seven) groupings of the 3 ...

cyanobacteria Bacteria, formerly known as blue- green algae; aquatic and photosynthetic organisms that live in water and manufac ...

Alder reaction is a (4+2) cycloaddition; (b) the initial reaction of ozone with an alkene is a (3+2) cycloaddi- tion; and (c) th ...

reacts with dioxygen; the second heme is cytochrome a; the third site, copper-A, is a DINUCLEARcenter. cytochrome P-450 General ...

Dale, Henry Hallett(1875–1968) British Physiol- ogy Sir Henry Hallett Dale was born in London on June 9, 1875, to Charles James ...