Amylose nitrate

In a later paper(Ref 5), Ashford et al described an amylopectin nitrate having N= 13.25% which was attacked by hot alkali to a smaller degree than amylose nitrate Refs l)Beil — not found 2)Hackh(1944),... 

In the later paper(Ref 6), Ashford et al described amylose nitrate with N=13.25%. Hot alkali attacked it slightly more than amylopectin nitrate... 

The solubility of the amylose nitration product in ether-alcohol was reported (Ashford, Cook and Hibbert [39]) to be lower, e.g. 20%, than that of the nitration product of amylopectin, which is 86-87%. Such behaviour is explicable in terms... 

X-ray analy.sis was carried out simultaneously with KtUaezkowska and 1. Urbanski ( ol. II, pp. 422-423) by Berl and Kunze (381 snd by Centola [39], IrThe former authors examined both amylose nitrate and amylopcctine nitrate. 

Nitration of amylose was carried out according to the Will Lenze method, using mixed nitric-sulfuric acid as described under nitration of starch(Ref 4). The resulting product had N=12.96%, soly in ale 20% and stability(by Abel and Bergmann-Junk tests) higher than for aminopectin nitrate(Ref 5). 

A further factor that causes the non-homogeneity of nitrostarch is the presence of the two components, amylose and amylopectin in starch. It has been demonstrated by nitrating each of these starch components separately that the nitration products differ from one another. Berl and Kunze [37] detected that amylopectin yields a product of a considerably higher viscosity than that resulting from the nitration of amylose. This effect may be attributable to the higher molecular weight of amylopectin. 

Leibowitz and Silmann [26] have nitrated the degradation products of poly-amylose, namely di-, tri-, and tetra-amylose . Following in principle the nitration method introduced by Will and Lenze, Leibowitz and Silmann obtained a series of compounds, which they named ... 

W.R.Ashford et al, CanJRes 25B, 151- 54 (1947)(Effect of hot alkali solas on the nitrates of starch, amylose araylopectin) Ibid, 25B,... 

For the oxidation of primary hydroxyl groups, three times the amount of nitrite is required when compared with nitrate, and three times as much of the toxic NO would be formed. This oxidation procedure has been applied to the glucans cellulose, amylose, and pullulan. A study of this system with cyclomaltoheptaose (/J-cyclodextrin) showed that the reaction is autocatalytic. 

Amylose and its nitrated starch products were also studied by Pringsheim et al(Ref... 

Polyamylose, Nitrated. See under Amylose in Vol 1, A398-Rto A399-R... 

Esters from unsaturated fatty acid chlorides are usually viscous or limpid oils soluble in hydrocarbons and turpentine, and whose primary applications are as varnishes, films, artificial threads, aqueous emulsions, and rubber-like plastics.2067,2068 Heating them in an inert gas produced insoluble products formed by polymerization involving double bonds in the acyl moieites.2069 As mentioned in the section on nitrates, acetates of amylose are less compact than amylopectin acetate.1468 Esters of unsaturated acids have also been proposed as re-moistenable adhesives.1971 1972... 

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