• 제목/요약/키워드: H143

검색결과 689건 처리시간 0.029초

유우원(乳牛源) 대장균군세균(大腸菌群細菌)의 치사열(致死熱)에 관한 연구 (Survival and Thermal Inactivation of Coliform Bacteria after the Heat Treatment at 143°F)

  • 정길택;한홍율
    • 대한수의학회지
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    • 제11권2호
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    • pp.137-140
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    • 1971

  • Survival and thermal inactivation after heat treatment at $143^{\circ}F$ were observed among 27 strains of coliform bacteria isolated from dairy cattle. The results obtained were as follows. 1. The obvious differences in heat-sensitivity were observed among the strains tested. 2. No strain was found resistant to the heat treatment of $143^{\circ}F$ for 30 minutes. 3. A marked effect of density of coliform bacteria on the survival after the heat treatment was observed. As the density of coliform bacteria was increased, the rate of survival was increased markedly regardless of the length of heat treatment.

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Limits of Exogenous Fibrolytic Enzymes to Improve Digestion and Intake of a Tropical Grass

  • Assoumaya, C.;Boval, M.;Weisbecker, J.L.;Saminadin, G.;Archimede, H.
    • Asian-Australasian Journal of Animal Sciences
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    • 제20권6호
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    • pp.914-919
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    • 2007

  • The effect of the addition of exogenous fibrolytic enzymes (mainly xylanase and cellulase activities, 15 ml/15 kg of fresh forage), on intake, total tract digestibility and nylon bag degradability of a chopped fresh Digitaria decumbens grass was studied at 2 stages of regrowth ( 21 and 56-day old grasses). Moreover, comparisons between ground and chopped grass were done using the nylon bag degradability method. DM intake (g/kg $BW^{0.75}$) and organic matter total tract digestibility for control and enzyme treatments respectively were 69.1 vs. 65.9 (p>0.05) and 0.723 vs. 0.727 (p>0.05) with the 21-day old regrowth. Based on the same parameters, values for the 56-day old grass were 58.1 vs. 52.7 (p>0.05) and 0.621 vs. 0.591 (p>0.05). Nylon bag degradation at 24 h of the dry matter for control versus enzyme treatments were 0.653 vs. 0.70 (p<0.05) and 0.644 vs. 0.733 (p<0.0001) for the 21-day old chopped and ground forage respectively, whereas with the 56-day old grass, corresponding values were 0.321 vs. 0.392 (p<0.0001) and 0.463 vs. 0.481 (p>0.05). The positive impact of exogenous fibrolytic enzymes (EFE) on degradability of the young and ground pangola grass may suggest that in some cases, enzyme accessibility to potentially digestible cell wall is a limiting factor in their digestion.

  • https://doi.org/10.5713/ajas.2007.914 인용 PDF KSCI

Glucose Oxidase 및 제빵용 효모 첨가에 따른 육계와 돼지의 혈장 포도당과 pH 변화 (Glucose Content and pH of Broiler and Porcine Blood Plasma by Glucose Oxidase or Baker's Yeast Addition)

  • 이재준;이영현
    • 한국식품과학회지
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    • 제31권2호
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    • pp.416-420
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    • 1999

  • 육계와 돼지의 혈장에서 포도당과 lysine이 축합하여 갈색의 물질을 생성하는 Maillard 반응을 억제시키기 위하여 혈장에 GOD 5 또는 10 units/g이나 제빵용 효모(0.3% w/w)를 첨가하여 탈당시켰다. GOD와 제빵용 효모의 첨가가 혈장 포도당 함량과 pH 변화에 미치는 영향을 조사했다. 초기 닭과 돼지 혈장의 평균 포도당 농도는 각각 $150\;mg/100\;cm^{3}$과 $143\;mg/100\;cm^{3}$이었다. GOD나 효모를 첨가한 혈장의 포도당 농도는 시간이 지남에 따라 감소되었다. 효모를 이용한 경우, 육계와 돼지의 혈장 포도당이 거의 없어지는데는 약 4시간 정도 걸렸다. 효모가 GOD 보다 혈장 포도당을 빨리 감소시켰고 GOD의 농도 10 units/g이 5 units/g보다 효과적이었다. 혈장 포도당을 제거함으로써 Maillard반응의 억제가 가능하리라 여겨진다. 혈장 포도당의 감소에 따라 pH도 같이 감소했다가 포도당 양이 안정된 후에는 pH 값이 약간 상승했다. 혈장의 pH를 측정함으로써 혈장의 탈당 정도를 간접적으로 알 수 있었다.

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