Ammonia cont

Ammonia (cont) liquid 20 9 Resistant tensile strength at yield and elongation at break unchanged Test specimen IB according to ISO 527-2 Lupolen Basell Specimen 50X25X1 mm... 

Ammonia (cont) dry gas 60 30 9 Neglible effect should be suitable for all applications Pro-Fax Himont Specimen 76X0.64 mm (3X0.025 in) dumbell specimen, unstressed... 

Ammonia (cont) concentrated solution 60 8 Resistant Vestamid Huls America... 

Ammonia (cont) liquid 20 15-25 9 Resistant little or no change in weight small effect on mechanical properties generally suitable for practical use... 

Ammonia (cont) 50 60 1 2 Poor resistance loss of Latilon LATI Industrie... 

Ammonia (cont) concentrated solution 23 28 8 Excellent resistance no change observed 0.7 95 89 Isoplast 301 Dow Chemical Specimen 3.2 mm (0.125 in) thick injection molded samples... 

Ammonia (cont) liquefied 60 3 Not recommended for use Geon Geon Company... 

Ammonia (cont) liquid undiluted 15-25 2 Partially resistant in course of time, there is a distinct deterioration in mechanical properties and a change in weight in many cases a short exposure may be considered allowable PVDF 1000 Quadrant EPP... 

Ammonia (cont) 10 200 1 7 Good resistance Larpeek LATI Industria... 

Electrostatic potential map—cont d ammonia, 145 aniline, 925 anilinium ion, 925 anisole, 111 18]annulene, 535 arene, 74 azulene, 541 benzaldehyde, 565, 704 benzene, 44, 521, 565 benzenediazonium ion, 945 benzoquinone, 631 benzyl carbocation, 377 benzyne, 576 borane, 223... 

Weedon, F.R., A.Hartzell, and C.Setterstrom. 1940. Toxicity of ammonia, chlorine, hydrogen cyanide, hydrogen sulfide, and sulfur dioxide gases. V. animals. Cont. Boyce Thompson Inst. 11 365-385. 

A bacterial isolate APN has been shown to convert a-anunopropionitril enantioselectively to L-alanine (94% yield, 75% e e). However, ttie major disadvantage of tius approach, is the low stability of most aminonitriles in water (for example a-aminophenylacetonitrile in water of pH 7, degrades cont letely wifhin 48 hours). The aminonitriles are always in equilibrium with the aldehyde or ketone and ammonia/HCN. Polymerisation of hydrogen cyanide gives an equilibrium shift resulting in the loss of the aminonitrile. Therefore, a low yield in amino adds is to be expected, which makes this method less attractive for the industrial syntiiesis of optically active amino adds. 

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