Journal of Fermentation Technology最新文献_第7页

Cross-flow filtration of yeast by microporous ceramic membrane with backwashing 微孔陶瓷膜反冲洗反流过滤酵母

Journal of Fermentation Technology Pub Date : 1988-01-01 DOI: 10.1016/0385-6380(88)90048-9

Kanji Matsumoto, Masato Kawahara, Haruhiko Ohya

引用次数: 45

Humification index (HI) as evaluation of the stabilization degree during composting 腐殖质化指数(HI)作为评价堆肥过程中稳定程度的指标

Journal of Fermentation Technology Pub Date : 1988-01-01 DOI: 10.1016/0385-6380(88)90091-X

Maria De Nobili, Fulvia Petrussi

引用次数: 65

Copper reduction by yeast cell wall materials and its role on copper uptake in Debaryomyces hansenii 酵母细胞壁材料对铜的还原及其对汉斯德巴氏菌铜吸收的影响

Journal of Fermentation Technology Pub Date : 1988-01-01 DOI: 10.1016/0385-6380(88)90102-1

Tohru Wakatsuki, Michiko Iba, Hirotsugu Imahara

{"title":"Copper reduction by yeast cell wall materials and its role on copper uptake in Debaryomyces hansenii","authors":"Tohru Wakatsuki, Michiko Iba, Hirotsugu Imahara","doi":"10.1016/0385-6380(88)90102-1","DOIUrl":"10.1016/0385-6380(88)90102-1","url":null,"abstract":"<div><p>Copper binding reducing activities of cell wall materials (CWM) prepared from cells of the yeast <em>Debaryomyces hamsenii</em> were examined. When CWM was treated with copper sulfate (0.1 mM CuSO<sub>4</sub>), the copper was partially reduced from Cu (II) to Cu (I) and bound to CWM (below 10 nmol per mg dry wt.). The bound copper was mostly in the fraction of mannan-protein. Both copper-binding ability and protein content decreased with protease treatments. Mannan-protein prepared from CWM bound more copper than mannan did. This suggests that Cu (II) bound to the protein portion in CWM and was reduced to Cu (I). The optimum pH of copper reduction by CWM was about 5.0. The amount of copper bound to CWM increased with reducing agents and decreased with oxidizing agents. On the other hand, the copper uptake by yeast whole cells and spheroplasts was also stimulated by reducing agents, but inhibited by oxidizing agents. Furthermore, copper uptake by spheroplasts was stimulated in the presence of CWM. The optimum pH of copper uptake coincided with that of copper reducing activity. These results suggest that yeast cell wall not only supplies copper binding but also reduces copper, and the reduced copper is transported into yeast cells. The yeast cells may have copper-reducing proteins in the cell wall.</p></div>","PeriodicalId":15702,"journal":{"name":"Journal of Fermentation Technology","volume":"66 3","pages":"Pages 257-265"},"PeriodicalIF":0.0,"publicationDate":"1988-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0385-6380(88)90102-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78184012","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: 13

l-Iditol production from l-sorbose by a methanol yeast, Candida boidinii (Kloeckera sp.) No. 2201 用甲醇酵母，假丝酵母(Kloeckera sp.) 2201号从l-山梨糖生产l-二醇

Journal of Fermentation Technology Pub Date : 1988-01-01 DOI: 10.1016/0385-6380(88)90084-2

Vitchuporn Vongsuvanlert , Yoshiki Tani

引用次数: 18

Interesterification of fats and oils by immobilized fungus at constant water concentration 恒定水浓度下固定化真菌对油脂的酯化反应

Journal of Fermentation Technology Pub Date : 1988-01-01 DOI: 10.1016/0385-6380(88)90090-8

Susumu Kyotani , Hideki Fukuda , Yasuhiro Nojima , Tsuneo Yamane

{"title":"Interesterification of fats and oils by immobilized fungus at constant water concentration","authors":"Susumu Kyotani , Hideki Fukuda , Yasuhiro Nojima , Tsuneo Yamane","doi":"10.1016/0385-6380(88)90090-8","DOIUrl":"10.1016/0385-6380(88)90090-8","url":null,"abstract":"<div><p>The kinetics of enzymatic interesterification of oils and fats, using acetone-dried cells of <em>Rhizopus chinensis</em> immobilized on biomass support particles as a lipase catalyst, were investigated in batch operations at several constant water concentrations.</p><p>Even under microaqueous (<em>i.e.</em>, low-water-content) conditions, not only interesterification but also hydrolysis occured, and the water content in the reaction system decreased. The reaction rates of interesterification and hydrolysis at constant water concentrations were determined.</p><p>For the reactions between olive oil and methyl stearate at several water concentrations, the parameters involved in the reaction model were determined by a trial-and-error method so as to make the calculated results correlate with the experimental data. The relationship between the parameters obtained and water concentration were examined.</p><p>The rate constants involved in the reaction model of both interesterification and hydrolysis increased or decreased monotonically with the increasing water content, while the apparent activity of the lipase catalyst for interesterification had a maximum value at a water concentration of about 50 ppm. This suggests that when the water content is excessive the hydrolysis activity of lipase is accelerated more than its interesterification activity, and that when the water content is too little lipase activity can not be activated for either hydrolysis or interesterification.</p></div>","PeriodicalId":15702,"journal":{"name":"Journal of Fermentation Technology","volume":"66 5","pages":"Pages 567-575"},"PeriodicalIF":0.0,"publicationDate":"1988-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0385-6380(88)90090-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74161038","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: 36

Enzymatic conversion of dehydrodivanillin to vanillin by an anaerobic recombinant FE7 厌氧重组FE7催化脱氢双苯胺醛制香兰素的研究

Journal of Fermentation Technology Pub Date : 1988-01-01 DOI: 10.1016/0385-6380(88)90113-6

Wei Chen, Mika Ohmori, Kunio Ohmiya, Shoichi Shimizu

{"title":"Enzymatic conversion of dehydrodivanillin to vanillin by an anaerobic recombinant FE7","authors":"Wei Chen, Mika Ohmori, Kunio Ohmiya, Shoichi Shimizu","doi":"10.1016/0385-6380(88)90113-6","DOIUrl":"10.1016/0385-6380(88)90113-6","url":null,"abstract":"<div><p>Enzymatic degradation of dehydrodivanillin (DDV) was studied using high performance liquid chromatography (HPLC) with an anaerobic DDV-degrading recombinant FE7 under both aerobic and anaerobic conditions. When 200 mg of FE7 cells were mixed with 40 μg DDV in 1 ml phosphate buffer (0.01 M, pH 7.0) and 10 mM mercaptoethanol and incubated at 37°C for 24 h under an O<sub>2</sub>-free CO<sub>2</sub> atmosphere, about 20 μg of DDV was decomposed. Only 12 μg DDV could be degraded when the same reaction was done under aerobic conditions, suggesting that the reaction occurs more easily under anaerobic than aerobic conditions. Enzymatic degradation of DDV was performed using a cell-free extract as a crude enzyme solution under aerobic conditions in a similar way. A reaction product detected and analysed by thin layer, high performance liquid and gas chromatographies and mass spectrometry was found to be vanillin from enzymatic reaction mixture. This enzymatic activity was not detected in either the culture supernatant or the heat-inactivated control. These results suggest that there may be an intracellular enzyme system which is involved in the conversion of DDV to vanillin. This is the first report to study the enzymatic degradation of DDV by anaerobes.</p></div>","PeriodicalId":15702,"journal":{"name":"Journal of Fermentation Technology","volume":"66 3","pages":"Pages 341-346"},"PeriodicalIF":0.0,"publicationDate":"1988-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0385-6380(88)90113-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77428173","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: 3

IM2, a new inducer of blue pigment production in Streptomyces sp. MAFF 10-06015 链霉菌(Streptomyces sp. MAFF 10-06015)蓝色色素生成新诱导剂IM2

Journal of Fermentation Technology Pub Date : 1988-01-01 DOI: 10.1016/0385-6380(88)90121-5

Masakatsu Yanagimoto , Kunisuke Matsumoto , Katsumi Mori

{"title":"IM2, a new inducer of blue pigment production in Streptomyces sp. MAFF 10-06015","authors":"Masakatsu Yanagimoto , Kunisuke Matsumoto , Katsumi Mori","doi":"10.1016/0385-6380(88)90121-5","DOIUrl":"10.1016/0385-6380(88)90121-5","url":null,"abstract":"<div><p>A new autoregulator designated as IM2, which induces blue pigment production in <em>Streptomyces</em> sp. MAFF 10-06015, was discovered. The culture conditions developed here for the production of the pigment by the strain did not require the addition of an artificial inducer such as γ-nonalactone or the autoregulator of <em>S. virginiae</em> MAFF 10-06014, IM, which induces the production of virginiamycin by this microorganism. The major improvements in the culture conditions for spontaneous pigment production included the inoculation conditions and the dilution of the medium. The method of IM2 assay was established and the time courses of IM2 production were followed in the cultures using flasks and a jar fermentor. It was confirmed that IM2 released once into the culture filtrate from the cells was taken up into the cells again. The concentration of IM required to induce pigment production in <em>Streptomyces</em> sp. MAFF 10-06015 was 50 u·ml<sup>−1</sup>. However a concentration of 200 u·ml<sup>−1</sup> of IM2 was unable to induce the production of virginiamycin in <em>S. virginiae</em> MAFF 10-06014.</p></div>","PeriodicalId":15702,"journal":{"name":"Journal of Fermentation Technology","volume":"66 1","pages":"Pages 1-6"},"PeriodicalIF":0.0,"publicationDate":"1988-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0385-6380(88)90121-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79814603","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: 9

Photoproduction of hydrogen by adapted cells of Chlorella pyrenoidosa 核核小球藻适应细胞对氢的光合作用

Journal of Fermentation Technology Pub Date : 1988-01-01 DOI: 10.1016/0385-6380(88)90124-0

Eiichi Kojima, Yuichi Yamaguchi

{"title":"Photoproduction of hydrogen by adapted cells of Chlorella pyrenoidosa","authors":"Eiichi Kojima, Yuichi Yamaguchi","doi":"10.1016/0385-6380(88)90124-0","DOIUrl":"10.1016/0385-6380(88)90124-0","url":null,"abstract":"<div><p>Photoproduction of hydrogen gas by the green alga <em>Chlorella pyrenoidosa</em> was studied in a large scale culture of 2.1. Hydrogen was produced by adding sodium hydrosulfite directly to an algal suspension after anaerobiosis in darkness for activation of hydrogenase. The hydrogen production rate showed a characteristic course of an initial burst of gas then steady production, and this course appeared most clearly at cell concentrations around 0.6–0.7 kg/m<sup>3</sup>. In the final third phase, the hydrogen production rate gradually decreased until evolution ceased. The steady hydrogen evolution was inhibited 75% by a herbicide, DCMU, which blocks electron flow through photosystem II, indicating that the electron donor for hydrogen production was mainly water. The average light intensity within the culture vessel was measured with a diffusing sphere photoprobe. The rate of hydrogen evolution increased hyperbolically with the average light intensity. The duration of hydrogen photoproduction was shorter at higher light intensity due to the inhibition of hydrogenase by concomitantly released oxygen. The duration was shorter also at higher concentrations of algal suspension. It was foudd that the optimum concentration of algae, about 0.7 kg/m<sup>3</sup> in this system, must be selected to maximize the yield of hydrogen.</p></div>","PeriodicalId":15702,"journal":{"name":"Journal of Fermentation Technology","volume":"66 1","pages":"Pages 19-25"},"PeriodicalIF":0.0,"publicationDate":"1988-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0385-6380(88)90124-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80710496","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 raw cassava starch-digestive glucoamylase by a 2-deoxyglucose-resistant mutant of Rhizopus sp. 根霉2-脱氧葡萄糖抗性突变体生产原料木薯淀粉消化葡萄糖淀粉酶的研究。

Journal of Fermentation Technology Pub Date : 1988-01-01 DOI: 10.1016/0385-6380(88)90087-8

Yoshiki Tani, Akira Fuji, Hiroshi Nishise

引用次数: 25

Cloning and expression of the hydroxylamine oxidase gene of Nitrosomonas europaea in Pseudomonas putida 恶臭假单胞菌中欧洲亚硝基单胞菌羟胺氧化酶基因的克隆与表达

Journal of Fermentation Technology Pub Date : 1988-01-01 DOI: 10.1016/0385-6380(88)90059-3

Tatsuaki Tokuyama, Yusuke Tomita, Reiji Takahashi

引用次数: 1