Amino-G-acid

G salt is converted to amino-G acid by heating with 25 per cent ammonia and ammonium sulfite at 140°G. (pressure, 20 atmospheres). The procedure involves nothing of special interest. A yield of 92 per cent of the theoretical amount is easily attained, and after blowing otF the ammonia, the whole reaction mass is fused with caustic. 

Two important azo dye intermediates, Amino J acid and Amino G acid, are also produced by the Bucherer reaction represented as follows ... 

Also useful in dye manufacture are the aminonaphthalenedisulfonic acids 2-amino-naphthalene-5,7-disulfonic acid (6-aminonaphthalene-l,3-disulfonic acid, 6-amino-l,3-naphthalenedisulfonic acid), or amino I acid (49a), and 2-aminonaphthalene-6,8-disulfonic acid (7-aminonaphthalene-l,3-disulfonic acid), or amino G acid (49b). 

The method employing chlorophosphonazo(IIl) was applied to determine Ca in water, food and pharmaceuticals [1]. The detection limit was 0.03 mg f Ca. No interferences from elements, excess vitamins, amino acids or citrate and acetate ions were observed. The speetrophotometric method based on amino G acid chlorophosphonazo was proposed to determine Ca in human serum and cerebrospinal fluids [2). The reagent reacts with Ca with the formation of greenish blue complex (A ax at 670 nm = 7.2 x 10 1 mor em ). Beer s law is obeyed over the range 0.02-0.8 g ml Ca. No interferences were observed from the commonly coexisting species present in the examined materials. 

Amtdo-G-Acid. 7,Amino-l,3-naphthatenedisul-fonic acid 2-naphthylamine-6,8-disu]fonic acid amino-G acid. C.0H9NO(Sj mol wt 303.32. C 39.60%, H 2.99%, N 4.62%, O 31.65%, S 21, 4%. Prepd by sulfnnation of p naphthylamine Fieri-David, Braunschweig, Heir Chim. Acta 6, 1146 (1923),... 

Beilstein Handbook Reference) 2-Amino-6,8-disulfonaphthalene 2-Aminonaphthalene-6,8-disulfonic acid 7-Amino-1,3-naphthalenedisulfonic acid 7-Aminonaphthalene-1,3-disulphonic acid AI3-28530 Amido-G-acid Amino-G-Acid BRN 2669649 EINECS 201-689-2 1,3-Naphthalenedisulfonic acid, 7-amino- p-Naphthylamine-6,8-disulfonic acid 2-Naphthylamine-6,8-disuflbnic xid NSC 4013. Used as an intermediate in manufacture of chemicals, particularly dyestuffs, mp = 274" soluble in H2O (92 g/l), EtOH, less soluble in non-polar organic solvents. Zen Brasal Pvt. Ltd. 

Lassaigne s test is obviously a test also for carbon in the presence of nitrogen. It can be used therefore to detect nitrogen in carbon-free inorganic compounds, e.g., complex nitrites, amino-sulphonic acid derivatives, etc., but such compounds must before fusion with sodium be mixed with some non-volatile nitrogen-free organic compound such as starch... 

All the amino-acids of physiological importance are a-amino-acids, e.g. (in addition to the above compounds), alanine or a-amino-propionk acid, CHaCH(NH,)COOH, and leucine or a-amino-Y-dimethyl-rt-butyric acid, (CH,)aCHCH,CH(NHa)COOH, and naturally occurring samples (except glycine) are therefore optically active. 

The recognition that short chain / -peptides can form regular secondary structures initially came from detailed conformational analysis of y9 -peptides 1 and 66 (which incorporates a central (2S,3S)-3-amino-2-methylbutanoic acid residue) by NMR in pyridine-d5 and CD3OH [10, 103, 164] and homooUgomers (as short as four residues) of trons-2-amino-cyclohexanecarboxyhc acid (trans-ACHC) (e.g. hex-amer 2 for the (S,S) series) by NMR and X-ray diffraction [6, 126, 159]. 

In reality all carbon atoms share equally the pool of electrons which constitute the double bonds and benzene resists addition across the double bonds which would otherwise destroy its unique structure and stability. Single or multiple hydrogen atoms can be substituted to form a host of derivatives containing similar functional groups to those above, e.g. saturated and unsaturated aliphatic chains, amino, carboxylic acidic, halogeno, nitro, and sulphonic acid groups as shown in Table 3.6. 

Self-emulsification The polymer molecules are modified chemically by the introduction of basic (e.g., amino) or acidic (e.g., carboxyl) groups in such concentration and location that the polymer undergoes self-emulsification without surfactant after dispersion in an acidic or basic solution. 

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