Journal of Fermentation and Bioengineering最新文献_第6页

Ethanol production by dark fermentation in the marine green alga, Chlorococcum littorale 海洋绿藻褐藻暗发酵生产乙醇的研究

Journal of Fermentation and Bioengineering Pub Date : 1998-01-01 DOI: 10.1016/S0922-338X(98)80031-7

Yoshiyuki Ueno , Norihide Kurano , Shigetoh Miyachi

引用次数: 136

Microbial conversion of d-xylose to xylitol d-木糖转化为木糖醇的微生物过程

Journal of Fermentation and Bioengineering Pub Date : 1998-01-01 DOI: 10.1016/S0922-338X(98)80026-3

Eleonora Winkelhausen, Slobodanka Kuzmanova

{"title":"Microbial conversion of d-xylose to xylitol","authors":"Eleonora Winkelhausen, Slobodanka Kuzmanova","doi":"10.1016/S0922-338X(98)80026-3","DOIUrl":"10.1016/S0922-338X(98)80026-3","url":null,"abstract":"<div>Xylitol, a five carbon sugar alcohol, occurs widely in nature but it is also a normal intermediate in human metabolism. As an alternative sweetener, it is recommended for diabetics and for the prevention of dental caries. Xylitol is currently produced chemically on a large scale. Microbial production is lately becoming more attractive since the downstream processing is expected to be cheaper. Among microorganisms, yeasts are the best xylitol producers, particularly those belonging to the genus Candida. The key enzymes for xylitol production in yeasts are d-xylose reductase which, using either NADH or NADPH, reduces d-xylose to xylitol, and predominantly, NAD-linked xylitol dehydrogenase which reoxidizes xylitol to d-xylulose. Xylitol accumulation in yeasts is sensitive to environmental conditions such as nutrition, temperature, pH, inoculum, substrate and aeration, with the last two being critical for yeast growth and fermentation. Hemicellulosic hydrolysates derived from hardwood and particularly from agricultural residues, such as sugar cane bagasse, corn cobs, wheat and rice straw, are used as feedstock for xylitol production. Due to the presence of inhibitory components, some of the hydrolysates have to be treated prior to microbial utilization. The most investigated types of processes have been batch ones, although fed-batch and immobilized systems have been characterized by the highest yields and productivities. Apart from the naturally occurring yeasts, recombinant strains of Saccharomyces cerevisiae in free and immobilized form were also investigated for xylitol production.</div>","PeriodicalId":15696,"journal":{"name":"Journal of Fermentation and Bioengineering","volume":"86 1","pages":"Pages 1-14"},"PeriodicalIF":0.0,"publicationDate":"1998-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0922-338X(98)80026-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89478073","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: 348

Cloning and sequencing of the gene encoding chitinase ChiA from Xanthomonas sp. strain AK and some properties of ChiA 黄单胞菌AK几丁质酶ChiA基因的克隆、序列分析及ChiA的一些特性

Journal of Fermentation and Bioengineering Pub Date : 1998-01-01 DOI: 10.1016/S0922-338X(99)80001-4

Kazuo Sakka , Ryo Kusaka , Akihiro Kawano , Shuichi Karita , Jiraporn Sukhumavasi , Tetsuya Kimura , Kunio Ohmiya

引用次数: 19

Enhancement of transfection efficiency using ligand-modified lipid vesicles 利用配体修饰脂质囊泡提高转染效率

Journal of Fermentation and Bioengineering Pub Date : 1998-01-01 DOI: 10.1016/S0922-338X(98)80075-5

Jun You, Masamichi Kamihira, Shinji Iijima

引用次数: 8

Effect of electric current on growth and alcohol production by yeast cells 电流对酵母细胞生长和产醇的影响

Journal of Fermentation and Bioengineering Pub Date : 1998-01-01 DOI: 10.1016/S0922-338X(97)86778-5

Kotoyoshi Nakanishi, Hiroharu Tokuda, Takahiko Soga, Takahiro Yoshinaga, Masahisa Takeda

引用次数: 54

Purification and characterization of α-amylase from hyperthermophilic archaeon Thermococcus profundus, which hydrolyzes both α-1,4 and α-1,6 glucosidic linkages 水解α-1,4和α-1,6糖苷键的超嗜热古细菌深热球菌α-淀粉酶的纯化及特性研究

Journal of Fermentation and Bioengineering Pub Date : 1998-01-01 DOI: 10.1016/S0922-338X(99)89005-9

Y. Kwak, T. Akiba, T. Kudo

引用次数: 31

Chitinolytic enzyme activity of Penicillium janthinellum P9 in bench-top bioreactor 台式生物反应器中紫青霉P9几丁质水解酶活性的研究

Journal of Fermentation and Bioengineering Pub Date : 1998-01-01 DOI: 10.1016/S0922-338X(99)80020-8

Massimiliano Fenice , Jean-Louis Leuba , Federico Federici

引用次数: 42

Method of Corynebacterium glutamicum fermentation time extension with high lysine production rate by leucine addition 添加亮氨酸延长谷氨酸棒状杆菌发酵时间高产赖氨酸的方法

Journal of Fermentation and Bioengineering Pub Date : 1998-01-01 DOI: 10.1016/S0922-338X(98)80058-5

Noboru Takiguchi, Naoki Fukui, Nobuyuki Shimizu, Hiroshi Shimizu, Suteaki Shioya

{"title":"Method of Corynebacterium glutamicum fermentation time extension with high lysine production rate by leucine addition","authors":"Noboru Takiguchi, Naoki Fukui, Nobuyuki Shimizu, Hiroshi Shimizu, Suteaki Shioya","doi":"10.1016/S0922-338X(98)80058-5","DOIUrl":"10.1016/S0922-338X(98)80058-5","url":null,"abstract":"<div>The effect of leucine addition on the production yield of lysine by Corynebacterium glutamicum AJ-3462 was studied and a method of increasing a fermentation time while maintaining high lysine producing activity was developed. When leucine was not added during the lysine production phase, a high molar production yield of lysine from glucose of 35.6% was obtained. However, lysine production did not continue for a long time and almost stopped at around 90 h. When leucine was added to the medium in the fermentor at 24 h intervals, lysine producing activity was maintained for a long time; however, the production yield of lysine from glucose was reduced to 23.5%. When leucine was added at 30 h intervals, the production yield of lysine from glucose was improved to 32.9%. However, leucine addition did not recover lysine producing activity after 162 h. From these results, in order to extend the fermentation time while maintaining lysine productivity and production yield at high values, a leucine addition strategy was developed as follows. The initial leucine concentration was set as 0.1 g/l. After depletion of leucine, it was added intermittently at 30 h intervals. The interval for intermittent addition was changed to 24 h when a decrease in cellular activity was recognized by on-line monitoring of the lysine production rate based on a metabolic reaction model. As a result, the fermentation time was extended to 174 h, and lysine productivity and total molar production yield of lysine from glucose became 0.104 g/l/h and 29.2%, respectively.</div>","PeriodicalId":15696,"journal":{"name":"Journal of Fermentation and Bioengineering","volume":"86 2","pages":"Pages 180-184"},"PeriodicalIF":0.0,"publicationDate":"1998-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0922-338X(98)80058-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86269669","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

Production of erythritol in fed-batch cultures of Trichosporon sp. Trichosporon sp.分批培养中赤藓糖醇的生产。

Journal of Fermentation and Bioengineering Pub Date : 1998-01-01 DOI: 10.1016/S0922-338X(99)80010-5

Jinbyung Park , Byungcheol Seo , Jungryul Kim , Yongkun Park

引用次数: 51

Magnetic field effects on photosynthesis and growth of the cyanobacterium Spirulina platensis 磁场对蓝藻螺旋藻光合作用和生长的影响

Journal of Fermentation and Bioengineering Pub Date : 1998-01-01 DOI: 10.1016/S0922-338X(98)80136-0

Morio Hirano, Akira Ohta, Katsuya Abe

{"title":"Magnetic field effects on photosynthesis and growth of the cyanobacterium Spirulina platensis","authors":"Morio Hirano, Akira Ohta, Katsuya Abe","doi":"10.1016/S0922-338X(98)80136-0","DOIUrl":"10.1016/S0922-338X(98)80136-0","url":null,"abstract":"<div>We investigated the influence of a magnetic field on photosynthesis in, and the growth of Spirulina platensis (S. platensis), under magnetic fields with magnetic flux densities varying from 0.5 gauss (geomagnetic field) to 700 gauss. The specific growth rate of S. platensis was the highest at 100 gauss, being 1.5-fold that at 0.5 gauss, while the growth was obviously inhibited at 700 gauss. The existence of a magnetic field had no effect on the growth when S. platensis was cultured in the dark on a medium containing 0.3% glucose. The oxygen evolution rate during photosynthesis increased with increase in magnetic flux density, and the intracellular concentrations of sugar and phycocyanin, a light-harvesting pigment present in the thylakoid membrane in which reactions of the photosynthetic electron transfer system occur, reached maximal values at 100 gauss. At magnetic flux densities of a over 100 gauss, the phycocyanin content decreased with increase in magnetic flux density. The content of glyceroglycolipid, which exists exclusively in the thylakoid membrane, decreased with increase in magnetic flux density, especially so at 700 gauss, when it became 44% that at 0.5 gauss. From the aforementioned results, it is evident that magnetic fields accelerate the growth of S. platensis associated with activation of light excitation in the photosynthetic electron transfer system and increase in phycocyanin contents, and that these effects are maximal at magnetic flux densities of around 100 gauss. Nevertheless, when a magnetic flux density of over 400 gauss was applied, growth inhibition was observed with decrease in the phycocyanin content, and production of chemical energy necessary for sugar synthesis.</div>","PeriodicalId":15696,"journal":{"name":"Journal of Fermentation and Bioengineering","volume":"86 3","pages":"Pages 313-316"},"PeriodicalIF":0.0,"publicationDate":"1998-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0922-338X(98)80136-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77532250","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: 53