• Title/Summary/Keyword: Candida sp.

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Production of Glutathione by Candida sp. Mutant (Candida sp. 변이주에 의한 Glutathione 생산)

  • 김대선;유재홍;신원철;윤성식
    • Microbiology and Biotechnology Letters
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    • v.21 no.5
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    • pp.435-439
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    • 1993
  • For the overproduction of glutathione, Candida sp. mutant was isolated by the treatment with U.V. light. The highest glutathione production of Candida sp. mutant was obtained after shaking culture for 48 hours in the cullture medium containing glucose 1.5%(w/v), yeast extract 4.0% (w/v), KH2PO4 0.04%(w/v), biotin 5 ng/ml, and L-cysteine 0.04%(w/v). The optimal pH and temperature for the glutathione production were pH 6.0 and 25C, respectively.

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Stomach Distension Syndrome of Seawater Farmed Rainbow Trout(Oncorhynchus mykiss) (해수 사육 무지개송어(Oncorhynchus mykiss)의 위팽창증후군)

  • Kim, Wi-Sik;Kong, Kyoung-hui;Oh, Myung-Joo
    • Korean Journal of Ichthyology
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    • v.29 no.1
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    • pp.75-79
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    • 2017
  • About 10% mortality occurred in cultured rainbow trout Oncorhynchus mykiss at a marine farm in Jeju in 2014. Diseased fish showed markedly abdominal distension and distended stomach. Although parasites, bacteria or viruses were not isolated from diseased fish, numerous Candida sp. were isolated from distended stomach. In experimental infection with Candida sp., mortality was not observed in most fish and clinical sign of distended stomach was not observed in the fish. These results suggest that Candida sp. may not be the etiologic agent of stomach distension syndrome. This is the first report of stomach distension syndrome in seawater farmed rainbow trout in Korea.

Isolation, Identification and Culture Condition of Microorganism Producing Glutathione (Glutathione 생산균주의 분리 동정 및 생산조건)

  • 신원철;김대선;유주현;유재홍
    • Microbiology and Biotechnology Letters
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    • v.21 no.1
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    • pp.1-5
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    • 1993
  • The strain which produced glutathione was isolated from soil samples. The isolated strain was identified as the genus Candida through its morphological. cultural and physiological characteristics. The highest production of glutathione by Candida sp. was obtained after cultivation with shaking for 36 hours in the culture medium containing fructose 1.0%, yeast extract 4.0%. NaCI 0.04%, thiamine-HCI $5{\mu}g$/ml, and L-cysteine 0.04%. The optimal pH and temperature for the glutathione production were pH 6.0 and $25^{\circ}C$, respectively. The glutathione production by Candida sp. under the optimal culture condition was $92{\mu}g/ml$.

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Novel Synthesis of bis Acetylated Hybrid Pyrazoles as Potent Anticandidiasis Agents (항칸다디아 활성이 우수한 bis acetylated hybrid pyrazoles의 합성 연구)

  • Kanagarajan, V.;Ezhilarasi, M. R.;Gopalakrishnan, M.
    • Journal of the Korean Chemical Society
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    • v.55 no.2
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    • pp.256-261
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    • 2011
  • A new series of bis acetylated hybrid pyrazoles were synthesized and characterized by their melting point, elemental analysis, MS, FT-IR, one-dimensional $^1H$, and $^{13}C$ NMR spectroscopic data. All the synthesized compounds were tested for their in vitro antifungal activities against Candida sp. namely Candida albicans, Candida glabrata, Candida parapsilosis, Candida dubliniensis and Candida tropicalis. A close inspection of the in vitro anticandidal activity profile in differently electron donating ($CH_3$ and $OCH_3$) and electron withdrawing (-F, -Cl, and Br) functional group substituted phenyl rings of novel hybrid pyrazoles exerted strong anticandidal activity against all the tested Candida species.

Studies on the Hydrolysis of Milk Fat by Microbial Lipases (미생물에서 추출된 Lipase의 유지방 분해)

  • Park, Jong-Hack;Lee, Young-Chun
    • Korean Journal of Food Science and Technology
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    • v.17 no.2
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    • pp.60-64
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    • 1985
  • To utilize microbial lipases for hydrolysis of milk fat, optimum reaction conditions and characteristics of enzymatic reactions of lipases originated from Rhizopus delemar, Mucor sp., and Candida cylindracea were investigated. Optimum pH and temperature were pH 5.6 and $45^{\circ}C$ for Rhizopus delemar lipase, pH7.5 and $35^{\circ}C$ for Mucor sp. lipase, and pH7.5 and $35^{\circ}C$ for Candida cylindracea lipase. Optimum lipase concentration and optimum substrate concentration were $600{\sim}800\;units/ml$ and 20% milk fat, regardless of their origin. Km values were 6.06% milk fat for Rhizopus delemar lipase, 7.69% for Mucor sp. lipase and 7.99% for Candida cylindracea lipase. Rate of lipid hydrolysis was Rhizopus delemar lipase>Mucor sp. lipase>Candida cylindracea lipase. As the reaction time was extended, liberation of short chain fatty acids was increased. After 8 hours reaction, capric acid content significantly increased with Candida cylindracea lipase, palmitic acid with Mucor sp. lipase and butyric acid with Rhizopus delemar lipase.

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Two New Species of Cryptococcus sp. and Candida sp. from Wild Flowers in Korea

  • Min, Jin-Hong;Kang, Min-Gu;Ryu, Jin-Ju;Lee, Hyang-Burm;Kim, Chang-Mu;Kim, Ha-Kun;Lee, Jong-Soo
    • Mycobiology
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    • v.40 no.4
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    • pp.255-257
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    • 2012
  • Among 80 types of yeast isolated from wild flowers in Daejeon, Korea, two species that have not yet been identified by phylogenetic analysis of the internal transcribed spacer-2 (ITS2) genes and 26S rDNA sequences were identified as Candida sp. 44-C-1 and Cryptococcus sp. 9-D-1. Neither of the newly identified species formed ascospores, while Candida sp. 44-C-1 formed pseudomycelium and Cryptococcus sp. 9-D-1 did not.

Production of Xylitol by Catabolite Derepressed Mutant of Candida sp. (Candida sp.의 Catabolite Derepressed Mutant에 의한 Xylitol 생산)

  • 한완옥;서진호;유연우
    • KSBB Journal
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    • v.13 no.1
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    • pp.6-12
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    • 1998
  • In order to produce xylitol from hemicellulose hydrolysate which is widely used as a substrate, the development of strain such as catabolite derepressed mutant is required. After treatment of Candida sp. with EMS, GM-17 and PM-34 as catabolite derepressed mutant were isolated from Candida guilliermondii and Candida parapsilosis, respectively. Mutant GM-17 and PM-34 simultaneously assimilated xylose and glucose during the fermentation. The specific xylose reductase and xylitol dehydrogenase activities of mutant strains were also higher than those of wild strains in glucose medium and mixed medium of glucose and xylose. The xylitol productivity and yield of mutant GM-17 and PM-34 were improved as compared to the wild types in the mixed medium. The xylitol productivity and yield of mutant GM-17 were 0.09 g/L·hr and 0.56 g-xylitol/g-xylose, and those of mutant PM-34 were 0.21 g/L·hr and 0.52 g-xylitol/g-xylose in the mixed medium, respectively.

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응집성 효모인 Candida sp. HY200에 의한 xylitol 생산

  • Gang, Hui-Yun;Seo, Jin-Ho;Yu, Yeon-U
    • 한국생물공학회:학술대회논문집
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    • 2001.11a
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    • pp.374-377
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    • 2001
  • On the basis of high-osmotic tolerance and xylitol productivity, it was isolated a novel strain from soil of rice field. An isolated strain was tentatively designated as Candida sp. HY200, deduced from the systematic approaches of bacterial identification by Biolog $Microlog^{TM}$ and, revealed an interesting ability of flocculation during the cultivation. With respect to the osmotic-tolerance and flocculation ability, experiment was carried out to investigate the production of xylitol in high xylose concentration. When xylose concentration was 260 g/L, it was obtained 205 g/L xylitol with 79% of yield and 2.14 g/L ${\cdot}$ h of productivity Consequently, We convinced that Candida sp. HY200 stands a very favorable comparison with C. tropicalis.

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Evaluation of the Antimicrobial Activities of 35 Seaweed Extracts against Pathogenic Bacteria and Candida sp. (35종 해조류 추출물의 병원성 세균 및 Candida sp. 진균에 대한 항균 활성 평가)

  • Kim, Mi-Sun;Kwon, Kyung-Jin;Lee, Min-Jin;Ahn, Seon-Mi;Sohn, Ho-Yong
    • Microbiology and Biotechnology Letters
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    • v.40 no.2
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    • pp.144-151
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    • 2012
  • In the course of this study aimed at the development of functional food ingredients from seaweeds, the in vitro antimicrobial activities of methanol extracts prepared from 35 different seaweeds (17 phaeophyta, 11 rhodophyta and 7 chlorophyta) were determined against food-borne diseases and pathogenic microorganisms including multi-drug resistant (MDR) Pseudomonas sp. and Candida sp. Based on disc-diffusion assays at 500 g/disc concentration of the methanol extracts, Ishige okamurai, I. foliacea, Sargassum confusum, and S. yamade exhibited strong antibacterial activities in a broad-spectrum, except against Pseudomonas aeruginosa. In addition to the latter four seaweeds, Ecklonia stolonifera, E. cava and Eisenia bicyclis also demonstrated antifungal activity against C. albicans. Among these 8 selected seaweeds, I. okamurai, I. foliacea, and S. yamade exhibited strong hemolytic activity (55-93%) at 500 g/ml against human RBC. Organic solvent sequential fractions using hexane, ethylacetate and butanol, and water residues were prepared from the 8 selected seaweeds and their anti-Candida sp. activities were further determined. The ethylacetate and butanol fraction of I. okamurai, and the hexane fraction of I. foliacea demonstrated antifungal activity against MDR-pathogenic Candida sp. Although the solvent fractions had no activity against MDR-Pseudomonas sp., our results suggest that seaweeds, especially Ishige okamurai, I. foliacea, S. confusum, and S. yamade could be developed as broad-spectrum antimicrobial ingredients.