symbol for a residue of the β‐amino acid l‐β‐aminoadipic acid, l‐3‐aminohexanedioic acid.
ororor20‐hydroxyecdysone; (22R)‐2β,3β,14,20,22,25‐hexahydroxycholest‐7‐en‐6‐one; the ecdysteroid isolated both from insects and from crustaceans. In insects, ecdysterone is formed in peripheral ...
Literally from the Latin ‘in every hundred’, so it is a fraction with the denominator of 100 replaced by this phrase, or by the symbol %. So 20 per cent=20%=20/100 which is 1/5 or 0.2.
A dish or other vessel in which substances can be heated to a high temperature. See also Gooch crucible.
A compound in which some or all of the hydrogen–1 atoms have been replaced by deuterium atoms.
A method of forming intricate metal articles or parts by electrodeposition of the metal on a removable conductive mould.
Hydrocarbons that have the same molecular geometry as the five Platonic solids, i.e. the tetrahedron, the cube, the octahedron, the dodecahedron and the icosahedron. These hydrocarbons have carbon ...
orabbr. for N‐tris(hydroxymethyl)methyl‐2‐aminoethanesulfonic acid; 2‐ [2‐hydroxy‐1,1‐bis(hydroxymethyl)ethyl]amino ethanesulfonic acid; a Good buffer substance; pKa (20 °C) = 7.5.
A dipeptide useful for the preparation of buffers in the pH range around its pKa (20 °C) of 8.40.
ororabbr. for (and trivial name of) 4‐(2‐hydroxyethyl)‐1‐piperazinepropanesulfonic acid; a Good buffer substance, pKa (20°C)= 8.0.
the trivial name for the amide of glycine, aminoacetamide; aminoethanamide; H2N–CH2–CO–NH2. It is predominantly cationic at neutrality and is useful as a buffer substance; pKa (20°C) = 8.20.
A triose phosphate, CHOCH(OH)CH2OPO3H2, that is an intermediate in the Calvin cycle (see also photosynthesis) and glycolysis.
A CD marker, expressed exclusively in T lymphocytes, that consists of the γ (25 kDa), δ (20 kDa), and ε (20 kDa) polypeptides of the T‐cell receptor complex. CD3 proteins ...
orora symmetrical 20×20 matrix containing values proportional to the probability that amino acid i mutates to amino acid j for all pairs of amino acids; the diagonal denotes ...
A photosynthetic pigment that traps light energy and channels it to chlorophyll a, the primary pigment, which initiates the reactions of photosynthesis. Accessory pigments include the carotenoids, ...
Compounds containing chromium in a higher (+3 or +6) oxidation state; e.g. chromic oxide is chromium(VI) oxide (CrO3).
Informal name for the type of electron-deficient three-centre bond holding the B-H-B bridges in boranes and similar compounds.
A pale yellow solid, C20H12, m.p. 179°C, whose molecules consist of five fused benzene rings. It occurs in tars from coal and tobacco smoke and is a carcinogen.
A colourless volatile nonflammable liquid, CH3Br; r.d. 1.68; m.p. –93°C; b.p. 3.56°C. It is a typical haloalkane.
To change an organic compound into carbon by heating, or to coat something with carbon in this way.