• 제목/요약/키워드: P600

검색결과 1,714건 처리시간 0.023초

고농도 셀레늄 처리가 노랑느타리버섯(Pleurotus cornucopiae) 생육과 물질전이에 미치는 영향(II) (Growth and substance transfer effect of Pleurotus cornucopiae by high concentration treatments of selenium(II))

  • 장현유;정기철;장인자
    • 한국버섯학회지
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    • 제3권2호
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    • pp.85-89
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    • 2005
  • 600, 700, 800, 900, $1000{\mu}g/50g$ 무기셀레늄($Na_2SeO_3$)의 배지처리에 의한 노랑느타리버섯 균사배양기간, 균사밀도, 초발이소요일수, 유효경수, 개체중, 유기셀레늄 전이량을 조사한 결과는 다음과 같다. $Na_2SeO_3$의 처리에 의한 노랑느타리버섯 균사배양기간은 대조구 22일에 비하여 $600{\sim}1000{\mu}g/50g$처리는 3~8일까지 농도가 진할수록 배양기간이 길어졌다. $Na_2SeO_3$의 처리에 의한 노랑느타리버섯 균사밀도는 $600{\sim}1000{\mu}g/50g$처리 까지는 대조구와 동일하게 보통이었다. $Na_2SeO_3$의 처리에 의한 노랑느타리버섯 초발이소요일수는 $600{\sim}1000{\mu}g/50g$처리는 대조구 5일에 비해 3~8일 까지 농도가 진할수록 초발이소요일수가 길어졌다. $Na_2SeO_3$의 처리에 의한 노랑느타리버섯 유효경수는 $600{\sim}1000{\mu}g/50g$처리는 10~16개로 대조구 18개에 비해 2~8개 까지 농도가 진할수록 유효경수가 적어졌다. $Na_2SeO_3$의 처리에 의한 노랑느타리버섯 수량(개체중)은 $600{\sim}1000{\mu}g/50g$ 처리는 94~166g/850cc로 대조구 123g/850cc에 비해 5.7~23.5%까지 농도가 높을수록 수량이 감소되었다. $Na_2SeO_3$의 처리에 의한 노랑느타리버섯 축적된 유기셀레늄 량은 $600{\sim}1000{\mu}g/50g$처리까지 $9.1{\sim}10.8{\mu}g/g/dry$로 농도가 높을수록 대조구 $0.05{\mu}g/g/dry$에 비해 182~216배까지 축적되었다. 결론적으로 노랑느타리버섯 균사배양기간, 균사밀도, 초발이소요일수, 유효경수, 개체중, 유기셀레늄 전이량은 $600{\sim}1000{\mu}g/50g$에서 억제되는 경향이 나타남에 따라 가장 적당한 농도는 $600{\sim}1000{\mu}g/50g$보다 낮은 $400{\mu}g/50g$이라고 본다.

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Effects of Feeding Betaine on Performance and Hormonal Secretion in Laying Hens

  • Park, Jae-Hong
    • 한국가금학회:학술대회논문집
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    • 한국가금학회 2006년도 제23차 정기총회 및 학술발표회
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    • pp.17-27
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    • 2006
  • The effects of dietary betaine on performance, blood compositions, hepatic amino acid concentrations and hormonal secretions were examined in laying hens. Egg production was significantly higher in birds fed the 16.5 % protein diet compared to those fed 14.5 % protein diet(p<0.05), whereas dietary supplementation of betaine did not show any significant effect. The high level of protein and betaine supplementation significantly improved egg weight, egg mass and feed conversion(p<0.05), while eggshell breaking strength, eggshell thickness and Haugh unit were not influenced by betaine and dietary protein levels. Supplemental betaine did not affect serum total protein, albumin and BUN concentration. However, uric acid concentration significantly increased in 600 ppm betaine-fed groups(p<0.05). Concentrations of most hepatic amino acid were influenced by increased protein feeding and dietary betaine supplementation. Hormone studies recorded significantly higher serum and hepatocyte IGF-I concentration in 600 and 1,200 ppm betaine treatments(p<0.05) compared to those of control group. IGF-I mRNA gene expression of hepatocytes revealed statistically correlated increase in 600 and 1,200 ppm betaine-fed groups compared to the controls(p<0.05). Serum IGFBP-3 concentration was significantly elevated in 600 ppm betaine treatments. However, the secretion of IGFBP-1 in hepatocyte of laying hens fed with 600 and 1,200 ppm of betaine showed a significant decrease compared to the control group(p<0.05). Results of these study show that dietary betaine supplementation affects protein and hormone metabolism in laying hens.

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구상흑연주철재의 마멸-부식특성에 미치는 pH의 영향 (The Effect on the Wear-Corrosion Behavior of Ductile Cast Iron in the Various pH Environments)

  • 임우조;박동기
    • Tribology and Lubricants
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    • 제19권1호
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    • pp.31-35
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    • 2003
  • This paper reports the studies on the wear-corrosion behavior of ductile cast iron in the various pH environments. In the variety of pH solutions, corrosion and wear-corrosion loss of GCD 600 were investigated. Also, the anodic polarization test of GCD 600 using potentiostat/galvanostat was carried out. And rubbed surface of GCD 60 using scanning electron micrographs after immersion and wear-corrosion test was examined in the environment of various pH values. The main results are as following In alkali zone, the wear-corrosion loss of GCD 600 increases, but corrosion loss decreases. The unevenness and crack of wear-corrosion surface in neutral zone becomes duller than that in alkali zone. As the corrosive environment is acidified, wear-corrosion behavior of GCD 600 with passing immersion time becomes sensitive.

Determining the Water Absorption and Rheological Properties of Rye Dough Made Using the Planetary Mixer P 600

  • Kim, Mun-Yong;Freund, Walter;Chun, Soon-Sil
    • Food Science and Biotechnology
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    • 제18권2호
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    • pp.456-462
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    • 2009
  • In comparison to processed wheat flour products, there is no established method for determining the water absorption of rye flour. The aim of this study was to work out a method using the Planetary mixer P 600 for the determination of water absorption (WA) and the rheological properties in rye dough made from rye flours of 4 different types (I-IV). In the correlation analysis showed that WA had positive correlation with ash, beginning of gelatinization, $125-160{\mu}m$ particles, sedimentation values at 20 and 25 min, bread yield, pH, and total titratable acidity, but had negative correlation with initial viscosity, gelatinization maximum, viscosities on swelling at 25, 28, and $31^{\circ}C$. The WA determined by the Planetary mixer P 600 agreed well with the experimental baking tests.

Alloy 600에 전기 도금한 Ni-P-Fe 및 Ni-P-B 층의 열적 안정성 연구 (Study on Thermal Stability of Ni-P-Fe and Ni-P-B Layers Electroplated on Alloy 600)

  • 김명진;김정수;김동진;김홍표
    • 한국표면공학회지
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    • 제43권2호
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    • pp.57-63
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    • 2010
  • In this study, thermal stability of the mechanical properties of Ni-P-B and Ni-P-Fe layers electroplated on Alloy 600 material was evaluated by measuring their microhardness, tensile strength, and elongation after heat treatment at $325^{\circ}C$ and $400^{\circ}C$. According to the results, there was no noticeable change in microhardness of the two electrodeposits before and after heat treatment at the temperatures for 30 days. In the case of a Ni-P-B electrodeposit, ultimate tensile strength (UTS) slightly increases with heat treatment time, while its elongation decreases, showing good thermal stability in the mechanical properties at high temperature. On the other hand, UTS and elongation of Ni-P-Fe decrease with heat treatment time, which is very unusual observation. This result was attributed to the bad microstructure of Ni-P-Fe having many defects in the deposit formed early stage of an electroplating process and their redistribution to link to become large ones during heat treatment.

저공해성 산란계 사료 개발을 위한 영양소 균형 평가 (Evaluation of Nutrient Balance for Development of Low-Pollution Layer Diets)

  • 홍종욱;김인호;권오석;이상환;이승진
    • 한국산학기술학회:학술대회논문집
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    • 한국산학기술학회 2000년도 추계학술대회
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    • pp.259-261
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    • 2000
  • 본 연구는 사료내 인분해효소 phytase을 첨가하여 곡류내 유기태인의 이용성을 최대화하고 인의 배설량을 최소화하므로서 저공해성 산란계 사료 개발에 기초자료로서 활용하는데 목적이 있다. 부화 후 64주령된 갈색 하이라인 24수(평균체중 1.9kg, 산란율 78.4%)를 공시하였다. 대조구는 옥수수-대두박 위주로 배합된 사료, 처리구는 대조구 사료에 각각 phytase를 200 unit/kg, 400 unit/kg 그리고 600 unit/kg 첨가한 구로서 4처리 3반복, 반복당 2수씩 완전임의 배치하였다. 건물과 질소 이용률을 보면 처리간의 차이는 보이지 않았다(P>0.05). 광물질 중 회분과 칼슘의 경우 phytase를 200 unit을 첨가한 구에서 가장 높은 이용률을 보였다(P<0.05). 인의 이용률은 phytase를 600 unit 첨가한 구가 57.64%로 다른 처리구보다 이용률이 높은 것으로 나타났다(P<0.05). 칼슘의 섭취량과 배설량을 고려한 결과 칼슘의 축적량은 phytase를 200 unit와 400 unit 첨가한 구가 대조구와 phytase를 600 unit 첨가한 구보다 높았다(P<0.05). 산란계에 대한 각각의 인의 섭취량을 보면 phytase를 600 unit 첨가한 구가 대조구, 200 unit 첨가한 구, 400 unit 첨가한 구보다 많은 양을 섭취하였으나(P<0.05), 인의 배설량에는 별다른 차이가 없었다(P>0.05). 그로 인해 인의 축적량 또한 phytase를 600 unit 첨가한 구가 다른 처리구에 비해 많이 축적되었다(P<0.05). 혈중 칼슘의 함량은 phytase를 400 unit 첨가한 구와 600 unit 첨가한 구, 대조구간에는 서로 유의적인 차이가 없었고, phytase를 200 unit 첨가한 구보다 그 함량이 높게 나타났다(P<0.05). 결론적으로 산란계 사료에 phytase를 첨가할 때 환경문제를 야기시킬 수 있는 인의 배설량을 감소시키고 값비싼 무기태 인의 일부를 대체하는데 크게 기여할 수 있으리라 사료된다.

Inconel 600 및 690 튜브 재질의 일반 부식에 관한 실험적 연구 (An Experimental Research on Uniform Corrosion of Inconel 600 and 690 Tubing Material)

  • 염유선;황정래;전인섭;김숭평;윤장희
    • 방사성폐기물학회지
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    • 제4권2호
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    • pp.103-116
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    • 2006
  • 본 논문은 국내 PWR 발전소에서 S/G tube 재질로 사용되고 있는 Inconel 600 및 690에 대한 부식 실험을 수행함으로써 작업자들의 주요 피폭원인 $^{58}Co,\;^{60}Co,\;^{51}Cr,\;^{54}Mn,\;^{59}Fe$의 생성량을 예측하고자 하였다. 이를 위해 Inconel 600 및 690 재질로 총 12개의 시편을 제작하여 실제 발전소의 운전조건과 유사하거나 가혹한 조건에서 전면 부식실험을 pH별로 20일씩 총 60일간 수행하였고, 실험 결과를 정량적으로 분석하기 위해 GDS(Glow Discharge Spectrometer) 장비를 사용하였다. GDS 장비를 이용하여 정량적으로 분석한 결과 pH 7 및 9에서는 Inconel 600이 Inconel 690에 비해 부식이 잘 되는 것으로 나타난 반면, pH 4에서는 Inconel 690이 부식이 더 잘 되는 것으로 평가되었다. 이러한 경향을 보이는 것은 과도상태의 영향이 과도하게 반영된 것에 기인한 것으로 비교적 정확한 결론을 도출하기 위해서는 장시간의 부식 실험을 수행함으로써 과도상태에 의한 영향을 최소화해야 할 것으로 판단된다.

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Optimal design of finger phalanges

  • Choi, H.R.;Chung, W.K.;Youm, Y.
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 1992년도 한국자동제어학술회의논문집(국제학술편); KOEX, Seoul; 19-21 Oct. 1992
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    • pp.360-365
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    • 1992
  • An optimal design method to determine the lengths of finger phalanges is proposed especially for anthropomorphic design. The quality of designs are quantified by several measures of global isotropy for design, Also, for an example, optimal design of two fingers is performed and the results are compared with the anatomical data.

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Morphological Diversity of Marine Microorganisms on Different Isolation Media

  • Lee, Hong-Kum;Park, Shin-Hye;Kwon, Kae-Kyoung;Lee, Deuk-soo
    • Journal of Microbiology
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    • 제40권2호
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    • pp.161-165
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    • 2002
  • Isolation frequency of microorganisms from marine sources was examined with different media and samples collected from the coastal area of Cheju Island. From sea water samples, about 1% of microorganisms from the total number of bacteria were recovered. Microorganisms were cultured at the much lower frequency of 10$\^$-4/-10$\^$-6/ from other marine sources such as sediment, sponges and corals. The frequency of duplicated isolation was examined with 140 morphologically different colonies isolated on different media. Fourteen percent of them exhibited the same morphology on two different media. The duplication frequency of the isolates among three different media was 33%.

Optimal Conditions for the Production of Exopolysaccharide by Marine Microoranism Hahella chejebsis

  • Ko, Sung-Hwan;Lee, Hyun-Sang;Park, Shin hye;Lee, Hong-Kum
    • Biotechnology and Bioprocess Engineering:BBE
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    • 제5권3호
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    • pp.181-185
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    • 2000
  • A marine microorganism, strain 96CJ10356 produced exopolysaccharide, designated as EPS-R. To optimize culmize culture conditions for the production of EPS-R, carbon and nitrogen sources, mineral salts, temperature, and pH were exmined. From this study, STN medium for the production of EPS-R was suggested as follows; sucrose 20g, typtone 10g, NaCl 10g, MgSO45g, CaCl21g, KH2PO4 76mg, K2HPO4 83mg, FeCl2 5mg, MnCl2 1mg, NaMoO4 1mg, and ZnCl2 1mg per liter at pH 7.0. About 9.23g/L of EPS-R was obtained from STN medium after cultivation for 120h at $25^{\circ}C$ in a 5-liter jar fermentor with an aearation rate of 0.17 vvm. Apparent viscosity and flocculation activity of the culture broth were increased with the production of EPS-R and the maximal values were 415 cP and 1400 unit/mL against 0.5% activated carbon, respectively.

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