Biomass最新文献_第5页

Characterization of a glucoamylase immobilized on chitin 几丁质固定化葡萄糖淀粉酶的研究

Biomass Pub Date : 1990-01-01 DOI: 10.1016/0144-4565(90)90074-T

Denise Guimarães Freire, Geraldo Lippel Sant'Anna Jr.

引用次数: 7

Study of the molecular weight of bark extracts and products of their reaction with formaldehyde 树皮提取物及其与甲醛反应产物的分子量研究

Biomass Pub Date : 1990-01-01 DOI: 10.1016/0144-4565(90)90048-O

Chia M. Chen, Y. Hatano

{"title":"Study of the molecular weight of bark extracts and products of their reaction with formaldehyde","authors":"Chia M. Chen, Y. Hatano","doi":"10.1016/0144-4565(90)90048-O","DOIUrl":"10.1016/0144-4565(90)90048-O","url":null,"abstract":"<div>The molecular weights of sodium hydroxide extracts of various barks were determined by means of gel permeation chromatography (GPC). Products of these bark extracts were then obtained by allowing those extracts to react with formaldehyde or with formaldehyde and phenol. Following this, the molecular weight of the products were determined to investigate their reactivity.The molecular weight and reactivities of bark extracts toward formaldehyde differed with respect to species and extraction conditions. Reactivity was improved by adjusting the pH of reaction mixture before the reaction. After reacting with formaldehyde, bark extracts of high temperature extraction decreased their molecular weight, whereas those of low temperature extraction decreased their molecular weight; however, the molecular weight of low temperature extracts increased by adjusting the pH of the extracts to the same level as the high temperature extracts before the reaction. The chromatogram of acetylated samples obtained from three reactants (southern pine bark extracts, formaldehyde and phenol) shifted toward the higher molecular weight side, as compared to that of extracts before reaction.</div>","PeriodicalId":100179,"journal":{"name":"Biomass","volume":"21 1","pages":"Pages 65-74"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0144-4565(90)90048-O","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79377335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Ecological study of an Indian village ecosystem: Biomass production and consumption 印度乡村生态系统的生态学研究:生物质生产和消费

Biomass Pub Date : 1990-01-01 DOI: 10.1016/0144-4565(90)90030-N

Surendra K. Nisanka, Malaya K. Misra

引用次数: 14

Cultivation of Lemma gibba under desert conditions. II: The effect of raised winter temperature, CO2 enrichment and shading on productivity 沙漠条件下长臂猿的栽培。二、冬季温度升高、CO2富集和遮荫对生产力的影响

Biomass Pub Date : 1990-01-01 DOI: 10.1016/0144-4565(90)90069-V

Micha Guy, Gila Granoth, Joseph Gale

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引用次数: 3

Modeling algal productivity in large outdoor cultures and waste treatment systems 模拟大型户外培养和废物处理系统中的藻类生产力

Biomass Pub Date : 1990-01-01 DOI: 10.1016/0144-4565(90)90079-Y

Johan U. Grobbelaar, Carl J. Soeder, Eberhard Stengel

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引用次数: 82

Nickel as an accelerator of biogas production in water hyacinth (Eichornia crassipes solms.) 镍对水葫芦(Eichornia crassipes solms.)产气的促进作用

Biomass Pub Date : 1990-01-01 DOI: 10.1016/0144-4565(90)90056-P

G.S. Geeta, K.S. Jagadeesh, T.K.R. Reddy

引用次数: 28

The contribution of biomass to global energy use (1987) 生物质对全球能源使用的贡献(1987年)

Biomass Pub Date : 1990-01-01 DOI: 10.1016/0144-4565(90)90049-P

J.M.O. Scurlock, D.O. Hall

引用次数: 61

Biological upgrading of dilute ethanol streams to acetaldehyde for low-temperature recovery 低温回收稀乙醇流乙醛的生物升级

Biomass Pub Date : 1990-01-01 DOI: 10.1016/0144-4565(90)90061-N

William D. Murray, Sheldon J.B. Duff, Patricia H. Lanthier