Results 181 to 190 of about 7,412 (206)

Studies on the holocellulose of Sitka spruce : methylation of spruce holocellulose

2012
Sitka Spruce holocellulose has been prepared by the chlorite procedure as modified by Wise and associates. This material has been subjected to successive methylations. The methoxyl content and yield of the solid residue were determined after each methylation and the methoxyl contents have been compared with corresponding values obtained when extractive-
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THE PREPARATION OF CHLORITE HOLOCELLULOSE

Canadian Journal of Chemistry, 1952
Mildly acid sodium chlorite solutions were allowed to act on white birch and black spruce sawdust at room temperature for various times; the insoluble fraction and the soluble nondialyzable fraction were isolated and weighed. If chlorite acts selectively on lignin the sum of these two fractions in time approaches true holocellulose.
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Studies on the alkali extract from beech holocellulose

Wood Science and Technology, 1976
The alkali extract (5% KOH) from beech holocellulose was fractionated by ion exchange chromatography, resulting in several fractions containing different amounts of polyoses and lignin. The separated polyoses varied to some extent in the ratios of their sugar components.
Dietrich Fengel, Margarete Przyklenk
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Sugarcane bagasse derived carboxymethyl holocellulose

2022
This invention reports the development of a natural and sustainable cosmetic emulsifier based on by-products. We purpose a new emulsifier based on the holocellulose molecule and not cellulose and the carboxymethylation of holocellulose to produce a new cosmetic ingredient that acts as a O/w emulsifier, thickener, and jellifying agent.
Pedrosa, Sílvia, Madureira, Ana Raquel, Pintado, Manuela E., Pereira, Carla F., Ramos, Oscar Leandro   +4 more
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Grafting acrylonitrile and methyl methacrylate on holocellulosic materials

European Polymer Journal, 1987
Abstract Graft copolymers of acrylonitrile and methyl methacrylate on bleached holocellulose and thiolated holocellulose were obtained by the use of ceric ions in aqueous medium at 29°C. The level and efficiency of grafting on the bleached holocellulose were significantly higher than on the thiolated holocellulse, but the molecular weights and number
E.F. Okieimen, K.I. Idehen
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Virus adsorbent systems based on Amazon holocellulose and nanomaterials

Microscopy Research and Technique
AbstractThe environment preservation has been an important motivation to find alternative, functional, and biodegradable materials to replace polluting petrochemicals. The production of nonbiodegradable face masks increased the concentration of microplastics in the environment, highlighting the need for sustainable alternatives, such as the use of ...
Adriano de Souza Carolino, Xaiane Martins Silva Freitas, Célio Matias Airone Macalia, Juliana Coatrini Soares, Andrey Coatrini Soares, Camila da Costa Pinto, Aguyda Rayany Cavalcante Barbosa, Jaqueline de Araújo Bezerra, Pedro Henrique Campelo, Marcos Marques da Silva Paula, Pritesh Jaychand Lalwani, Natalia Mayumi Inada, Ștefan Țãlu, Adriana Malheiro, Edgar Aparecido Sanches   +14 more
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Note Graft Copolymerization of Methyl Methacrylate on Thiolated Holocellulose

Journal of Macromolecular Science: Part A - Chemistry, 1987
Abstract The use of eeric ions for initiating graft copolymerization of vinyl monomers on cellulosic materials has been reported by several workers [1-10]. Initiation of graft copolymerization is often thought to be by radicals generated on the cellulose by the abstraction of a hydrogen atom from a carbon atom carrying hydroxyl groups [1], oxidation of
F. E. Okieimen, K. I. Idehen
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Some aspects of graft copolymerization of acrylonitrile onto holocellulose

Acta Polymerica, 1989
AbstractThe graft copolymerization of acrylonitrile onto bleached holocellulose using an initiation procedure in which the unadsorbed ceric ions are removed from the polymerization system is reported. With this method higher graft levels and higher efficiency of grafting is achieved than with the continuous initiation method.
A. Bazuaye, F. E. Okieimen, O. B. Said
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Grass Holocellulose, Stepwise Hydrolysis of Grass Holocellulose

Journal of Agricultural and Food Chemistry, 1960
T. G. Phillips, D. G. Routley, J. T. Sullivan   +2 more
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Hemicelluloses from Maple Holocellulose

Industrial & Engineering Chemistry, 1948
R. L. Mitchell, S. C. Rogers, Geo. J. Ritter   +2 more
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