• 대한미생물학회지
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• 제35권5_6호
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• pp.372-372
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• 2000

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2005년도 생물공학의 동향(XVI)
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• pp.186-186
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• 2005

• Natural Product Sciences
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• 제17권1호
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• pp.19-22
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• 2011

Microbial metabolism of trans-2-dodecenal (1) was studied. Screening studies have revealed a number of microorganisms that are capable of metabolizing trans-2-dodecenal (1). Scale-up fermentation with Penicillium chrysogenum resulted in the production of two microbial metabolites. These metabolites were identified using spectroscopic methods as trans-2-dodecenol (2) and trans-3-dodecenoic acid (3).

• 한국미생물생명공학회:학술대회논문집
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• 한국미생물생명공학회 2003년도 2003 Annual Meeting, BioExhibition and International Symposium
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• pp.181-184
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• 2003

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2005년도 생물공학의 동향(XVII)
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• pp.1015-1016
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• 2005

• 한국미생물생명공학회:학술대회논문집
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• 한국미생물생명공학회 2005년도 2005 Annual Meeting & International Symposium
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• pp.283-284
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• 2005

• Biotechnology and Bioprocess Engineering:BBE
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• 제5권5호
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• pp.382-385
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• 2000

A mathematical model was developed, based on the time dependent changes of the specific growth rate, for prediction of the typical microbial cell growth in batch cultures. This model could predict both the lag growth phase and the stationary growth phase of batch cultures, and it was tested with the batch growth of Trichoderma reesei and Lactobacillus delbrueckii.

• Bulletin of the Korean Chemical Society
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• 제31권6호
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• pp.1729-1731
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• 2010

• 한국환경농학회지
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• 제27권2호
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• pp.139-144
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• 2008

고추 재배지 포장에서 고추 품종과 퇴비 시용 수준이 토양 미생물 활성과 다양성에 미치는 효과를 검증하고자 본 시험을 실시하였다. 2007년 4월에 퇴비를 30톤과 60톤 $ha^{-1}$을 살포한 다음, 영고4호와 고은 고추를 5월에 정식하였으며 8월 초에 토양을 채취하였다. 토양 미생물 활성은 탈수소 효소활성과 fluorescein diacetate(FDA) 수화도로 측정하였으며, 토양 미생물 군락은 $EcoPlate^{TM}$와 인지질 지방산을 분석하여 조사하였다. 모든 조사 항목에서 품종간 유의성 있는 차이는 발견되지 않았다. 퇴비 30톤과 60톤 $ha^{-1}$처리는 토양의 pH와 미생물 군락을 변화시켰고, 퇴비 60톤 $ha^{-1}$처리는 토양 유기물과 칼리 함량 증가 그리고 탈수소효소 활성과 FDA 수화도 증가에 효과적이었다. 결론적으로 단기적으로는 토양 화학적, 미생물적 특성에 미치는 영향이 고추 재배 품종보다는 퇴비 등의 유기 개량제의 영향이 크지만, 장기적으로 고추재배 품종 특히 '영고4호'가 일반 재배 품종과는 다른 토양 미생물적 특성을 유도할 수 있는 가능성을 보여 주었다.

• 한국근적외분광분석학회:학술대회논문집
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• 한국근적외분광분석학회 2001년도 NIR-2001
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• pp.1273-1273
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• 2001

The efficiency of the luminal fermentation process influences overall efficiency of luminal production, animal health and reproduction. Ruminant production systems have a significant impact on the global environment, as well. Animal wastes contribute to pollution of the environment as ammonia volatilized to the air and nitrate leached to ground water. Microbial protein synthesis in the rumen satisfies a large proportion of the protein requirements of animals. Quantifying the microbial synthesis is possible by using markers for lumen bacteria and protozoa such as nucleic acids, purine bases, some specific amino acids, or by isotopic $^{15}N,^{32}P,\;and\;^{35}S$ labelled feeds. All those methods require cannulated animals, they are time-consuming and some methods are very expensive as well. Many attempts have been made to find an alternative method for indirect measurement of microbial synthesis in intact animals. The present investigations aimed to assess possibilities of NIRS for prediction of purine nitrogen excretion and ruminal microbial nitrogen synthesis by NIR spectra of urine. Urine samples were collected from 12 growing sheep,6 of them male, and 6- female. The sheep were included in feeding experiment. The ration consisted of sorghum silage and protein supplements -70:30 on dry matter basis. The protein supplements were chosen to differ in protein degradability. The urine samples were collected daily in a vessel containing $60m{\ell}$ 10% sulphuric acid to reduce pH below 3 and diluted with tap water to 4 liters. Samples were stored in plastic bottles and frozen at $-20^{\circ}C$ until chemical and NIRS analysis. The urine samples were analyzed for purine derivates - allantoin, uric acid, xantine and hypoxantine content. Microbial nitrogen synthesis in the lumen was calculated according to Chen and Gomes, 1995. Transmittance urine spectra with sample thickness 1mm were obtained by NIR System 6500 spectrophotometer in the spectral range 1100-2500nm. The calibration was performed using ISI software and PLS regression, respectively. The following statistical results of NIRS calibration for prediction of purine derivatives and microbial protein synthesis were obtained.(Table Omitted). The result of estimation of purine nitrogen excretion and microbial protein synthesis by NIR spectra of urine showed accuracy, adequate for rapid evaluation of microbial protein synthesis for a large number of animals and different diets. The results indicate that the advantages of the NIRS technology can be extended into animal physiological studies. The fast and low cost NIRS analyses could be used with no significant loss of accuracy when microbial protein synthesis in the lumen and the microbial protein flow in the duodenum are to be assessed by NIRS.