Highly purified natural rubber. III. Biological properties.
نویسندگان
چکیده
منابع مشابه
Properties of highly purified fucan.
Fucan was first isolated by Kylin from brown seaweed and named fucoidin by him (1). More recently fucan was isolated by Percival and Ross (2) from several Phaeophyceae. They considered it to be a polymeric salt of fucose monosulfate. However, their most highly purified preparation still contained approximately 5.6% sugars other than L-fucose and 3.3 ‘% uranic acid. A branched structure was sugg...
متن کاملIsolation of microorganisms able to metabolize purified natural rubber.
Bacteria able to grow on purified natural rubber in the absence of other organic carbon sources were isolated from soil. Ten isolates reduced the weight of vulcanized rubber from latex gloves by >10% in 6 weeks. Scanning electron microscopy clearly revealed the ability of the microorganisms to colonize, penetrate, and dramatically alter the physical structure of the rubber. The rubber-metaboliz...
متن کاملThe Cyclization of Natural Rubber
The effects of solvent, temperature, time, weight percent of catalyst on the rate and mechanism of cyclization of natural rubber (NR) was studied in toluene and xylene solutions having tin tetra chloride catalyst (SnCl4). Iodometric titration show, with 8% SnCl4 (based on polymer weight) cyclization occurs, leaving 27.4% of the total unsaturation. Infrared spectra of c...
متن کاملProperties of baked starch foam with natural rubber latex
Petroleum-based synthetic plastics used for making consumer articles constitute the largest non-renewable source of municipal solid waste in the United States. Containers and packaging products represent the largest group within plastic waste in municipal landfills. Efforts are being made worldwide to search for renewable and biodegradable substitutes for non-biodegradable plastics. Starch from...
متن کاملThe Preparation and Properties of Highly Purified Ascorbic Acid Oxidase
1. A method is described for the preparation of a highly purified ascorbic acid oxidase containing 0.24 per cent copper. 2. Using comparable activity measurements, this oxidase is about one and a half times as active on a dry weight basis as the hitherto most highly purified preparation described by Lovett-Janison and Nelson. The latter contained 0.15 per cent copper. 3. The oxidase activity is...
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ژورنال
عنوان ژورنال: NIPPON GOMU KYOKAISHI
سال: 1996
ISSN: 1884-0442,0029-022X
DOI: 10.2324/gomu.69.562