• 제목/요약/키워드: in vitro protein quality

검색결과 235건 처리시간 0.029초

Studies on Heated Protein Quality Using Homoarginine Method

  • Lee, Kyung--Hee;Hel
    • Preventive Nutrition and Food Science
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    • 제1권1호
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    • pp.10-15
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    • 1996
  • To determine the quality of heated protein, in vitro method, invluding lysine, lysionalanine, and fructose-lysine as well as homoarginine by guanidination of lysine, was assessed using heated casein with of without glucose. In vivo methods such as PER, digestibility and BV were also tried on homoarginine, lysinoalanine, fructoselysine, and lysine. The nonreactive lysine for huanidination was hardly digestive, while the non heat damaged lysine side chanis in the protein were accessible for guanidination as well as for the digestion. A linear correlation(${\gamma}$=0.80) was obstained between PER and digestibility of the analysed lysine. Digestibility of homoarginine was higher that of true protein. However, in the guanidinated heated casein with glucose, digestibility of homoarginine was significantly reduced. It is suggested that the homoarginine method may mislead to over- or underestimation of the damaged protein quality.

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참게육 첨가 맛 두부의 단백질 품질 (Protein Qualities of Seasoned Tofu Containing Freshwater Crab Meat)

  • 류홍수
    • 한국수산과학회지
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    • 제42권6호
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    • pp.580-584
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    • 2009
  • The effect of freshwater crab meat additive on protein quality of tofu was studied. Tofu containing freshwater crab meat(TCM) prepared by the formulation for the best sensory qualities had about 20% more lipid and ash content than those of commercial tofu. TCM showed a higher content of lysine, methionine, cysteine and tyrosine compared with those in commercial tofu. TCM was comparable to commercial tofu(CT) regarding the in vitro protein digestibility(95%). A considerable difference in computed protein efficiency ratio(C-PER) resulted between CT(1.76-1.81) and TCM(2.61). Therefore, crab meat has potential as an ingredient for enriching essential amino acid and improving protein quality of CT.

Effects of wilting and additives on the ensiling quality and in vitro rumen fermentation characteristics of sudangrass silage

  • Wan, Jiang Chun;Xie, Kai Yun;Wang, Yu Xiang;Liu, Li;Yu, Zhu;Wang, Bing
    • Animal Bioscience
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    • 제34권1호
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    • pp.56-65
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    • 2021
  • Objective: This study was conducted to investigate the effects of molasses and Lactobacillus plantarum on the ensiling quality and in vitro rumen fermentation of sudangrass silage prepared with or without wilting. Methods: The ensiling experiment, measured with 3 replicates, was carried out according to a 2×4 (wilted stages×additives) factorial treatment structure. Dry matter of the fresh (210 g/kg fresh matter) or wilted (305 g/kg fresh matter) sudangrass were ensiled (packed into 5.0-L plastic jars) without additive (control) or with molasses (M), Lactobacillus plantarum (LP), or molasses + Lactobacillus plantarum (M+LP). After 60 days of ensiling, the silages were analyzed for the chemical, fermentation, and in vitro characteristics. Results: After 60 days of ensiling, the fermentation parameters were affected by wilted, the additives and the interactions of wilted with the additives (p<0.05). The M+LP treatment at wilted had higher lactic acid levels and V-score (p<0.05) but lower pH values and butyric acid concentrations than the other treatments. In comparison with sudangrass before ensiling, after ensiling had lower dry matter and higher non-fibrous carbohydrate. The in vitro gas production, in vitro dry matter digestibility, in vitro crude protein digestibility, and in vitro acid fiber detergent digestibility changed under the effects of the additives. Significant interactions were observed between wilted and the additives in terms of in vitro gas production at 48 h, asymptotic gas production, gas production rate, half time, and the average gas production rate. The total volatile fatty acid levels in the additive treatments were higher than those in the control. Conclusion: Wilting and supplementation with molasses and Lactobacillus plantarum had the ability to improve the ensiling quality and in vitro nutrient digestibility of sudangrass silage. The M+LP treatment at wilted exhibited the strongest positive effects on silage quality and in vitro ruminal fermentation characteristics.

식용 왕달팽이의 영양성분과 단백질 품질 (Nutrient Composition and Protein Quality of Giant Snail Products)

  • Mi-kyung Lee;Jeung-hye Moon;Hong-Soo Ryu
    • 한국식품영양과학회지
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    • 제23권3호
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    • pp.453-458
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    • 1994
  • 체색이 다른 세종류(백색육, 황색육, 회색육)의 식용 달팽이(Giant snail, Achatine fulica)의 일반성분과 무기질을 정량하여 이의 식품학적 가능성을 예측하였으며, 효소를 이용한 단백소화율(in vitro protein digestibility), 단백효율비(C-PER, computed protein efficiency ratio) 및 typsin inibitor 함량을 측정하여 이의 단백질 품질을 평가하였다. 또한 전처리 및 가공조건을 달리한 달팽이 제품의 단백질 품질을 측정하여 바람직한 처리조건을 찾으려 했으며, 달팽이육 중에 다량 포함되어 있는 점액성 물질이 다른 단백질의 소화율에 미치는 영향도 아울러 실험하였다. 1. 식용왕달팽이의 가식부는 39% 정도로서 해산패류보다 10%정도 높았으며 가식부 100g당 11.5~13.7%의 단백질, 0.9~1.3%정도의 지질이 함유되어 있다. 무기질로서는 칼슘, 칼륨 및 마그네슘이 풍부하였고 특히 칼슘함량은 굴(oyster)에 비교하여 5~10배 높았다. 2. 아미노산의 함량과 그 조성은 백색육, 회색육, 황색육이 모두 비슷하였고, 주요 아미노산은 aspaltic acid, glutamic acid, proline과 glycine으로 총아미노산의 52.5%를 차지하였고 특히 필수아미노산 함량이 총아미노산의 45~46%를 차지하여 균형잡힌 단백질로 판별되었다. 3. 생달팽이육의 단백질 소화율은 76.6%(회색육)~81%(황색육과 백색육)였으며 단백효율비는 2.24(백색육)~2.36(황색육) 범위였으나, trypsin inhibitor함량은 체색에 따라 다양하였다(백색윤 22.7mg/g solid, 회색육 28.97mg/g solid 및 황색육 36.75mg/g solid). 4. 10% 식염수에 5분간 침지한 후 10분간 boiling한 달팽이육의 소화율은 생육에 비해 1.7%(백색육)~5.7%(회색육)로 증가하였고, trypsin inhibitor 함량은 12.62mg/g solid (백색육)과 16.40mg/g solid (회색육)로 크게 감소하였으며, C-PER은 가공조건에 따라 변동이 없었다. 5. 생달팽이육에 다량 함유된 점액성물질은 여러가지 단백질의 소화율 2% (ANRC casein)~11%(filefish protein)로 감소시켰다.

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건조비지 첨가 두부의 영양적 품질평가 1. 단백질의 영양가 (Nutritional Evaluation of Tofu Containing Dried Soymilk Residue(DSR) 1. Evaluation of Protein Quality)

  • Kweon, Mi-Na;Ryu, Hong-Soo;Moon, Jeung-Hye
    • 한국식품영양과학회지
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    • 제22권3호
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    • pp.255-261
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    • 1993
  • 두부 제조공정 중의 부산물인 비지의 효율적인 이용을 위하여, 원료 대두 중량의 10%에 해당하는 건조비지를 첨가시킨 두부를 제조하여 이의 영양적 품질을 검토하였다. 일반성분은 수분의 경우 건조비지 첨가 두부가 80.6%, 일반 두부가 77.5%로써 비지 첨가 두부가 다소 높았으며 단백질의 함량은 건조비지 첨가 두부와 일반 두부 각각 38.5%, 45.8%였으며, 지질의 함량은 각각 34.3%, 26.9%로써, 단백질과 지질 함량이 낮은 건조비지 첨가로 인해 일반 두부에 비해 건조비지 첨가두부가 낮은 함량을 보였다. Trypsin inhibitor (TI) 함량은 비지의 경우 잔존량이 6.9 (mg/g시료)정도였고, 건조비지의 경우에도 거의 비슷하였다. 건조비지 첨가두부에는 원료 대두에 있었던 TI의 12% 정도만 남아있었다. 단백질의 효소소화율 (enzyme digestibility)은 비지, 건조비지 각각 87%, 86% 정도로 높았고 건조비지 첨가 두부도 일반 두부와 거의 동일한 91% 정도였다. 효소소화율은 TI함량이 저하함에 따라 역상관관계를 가지면서 상승하였다. 구성 아미노산 조성은 일반 두부와 건조비지 첨가 두부는 거의 차이가 없었으며, 총아미노산에 대한 필수 아미노산의 비율은 일반 두부가 40.4%, 비지첨가 두부가 40.6%였으며, lysine 함량이 높은 건조비지로 인하여 건조비지 첨가 두부는 lysine의 보충 효과가 있었다. 단백품질을 Computed Protein Efficiency Ratio (C-PER)로 계산할 때 일반 두부는 1.95, 비지 첨가 두부는 1.4였으나 Discriminant Computed Protein Efficiency Ratio (DC-PER)로 계산할 때는 오히려 비지 첨가 두부경우가 높았다. 여러 연구자들의 대두가공품에 대한 생체실험 결과와 비교할 때 일반 두부를 제외하고는 두유, 비지 및 비지첨가두부의 영양평가는 DC-PER 방법이 유리한 것으로 생각되었다.

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Identification of Protein Candidates in Porcine Oocytes during In Vitro Maturation

  • Lee, Jae-Dal;Cui, Xiang-Shun;Im, Gi-Sun;Seong, Hwan-Hoo;Kim, Nam-Hyung
    • Reproductive and Developmental Biology
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    • 제32권2호
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    • pp.71-79
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    • 2008
  • Surface-enhanced laser desorption and ionization time-of-flight mass spectrometry (SELDI-TOF MS) is one of the recently developed proteomic technologies which is based on capturing proteins and peptides by chemically modified surfaces and highly sensitive for the analysis of complex biological samples. In the present study, to gain insights into oocyte maturation and early embryo development, SELDI-TOF-MS was used to find the protein candidates that are specifically or prominently expressed in porcine oocytes at the in vitro matured metaphase II (MIIl) and germinal vesicle (GV) stages. By selected CM10 chip, 16 candidates were found to be up-regulated in GV stage oocytes compared with in MII stage oocytes, their molecular weights were 8,180 (2 candidates), 10,226 (5 candidates), 15,767 (5 candidates) and 16,770 (4 candidates) Da respectively. And the expression of 29 candidates were higher in MII than in GV stage oocytes, their molecular weight were 10,832 (3 candidates), 17,743 (8 candidates), 20,122 (3 candidates), 22,131 (3 candidates), 24,857 (7 candidates) and 33,507 (5 candidates) Da, respectively. The expression of selected 13 candidates (0.2 and 1.0 % error tolerances) were analyzed using real time RT-PCR. The proteins that differentially regulated during oocyte in vitro maturation in the pigs may be potential biomarkers of oocyte maturation and quality.

수산단백질(水産蛋白質) 소화화(消化華)에 미치는 가열처리(加熱處理)의 영향(影響) (Effect of Heat Treatment on the In Vitro Protein Digestibility and Trypsin Indigestible Substrate (TIS) Contents in Some Seafoods)

  • 류홍수;이강호
    • 한국식품영양과학회지
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    • 제14권1호
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    • pp.1-12
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    • 1985
  • 가열 및 동결저장이 오징어, 굴, 새우 및 명태의 in vitro 소화율과 trypsin indigestible substrate (TIS) 함량 변화에 미치는 영향을 실험한 결과는 다음과 같다. Boiling 했을 때 최고의 운 in vitro 소화율을 나타내는 시간은 오징어 1분, 내장을 제거한 굴 0.5분, 내장을 제거하지 않은 굴은 1분이었고, 명태는 5분 이었으며, 오징어와 굴은 부위에 따라 소화율은 다르게 나타났다. 최고의 in vitro 소화율을 나타내는 steaming 조건은 오징어는 $100^{\circ}C$에서 1분, 굴은 $88^{\circ}C$에서 1분이었으며, 명태는 $100^{\circ}C$에서 $1{\sim}2.5$분이었다. TIS는 진시료에서 in vitro 소화율과 역상관관계를 가지며 변화하였다. 동결건조한 시료가 다른 건조품보다 현저하게 높은 in vitro 소화율을 보였으나, 내장을 제거했거나 지방함량이 낮은 시료를 천일건조했을 때도 동결건조시료에 버금가는 in vitro 소화율을 나타내었다. 동결저장은 지방함량이 낮은 시료의 in vitro 소화율의 저하 및 TIS함량 증가에 효과적이었으나, 지방함량이 높아 산패가 심하게 진행된 시료에는 현저한 효과를 볼 수 없었다. 지방함량은 수산식품단백질을 가열처리했거나 저장했을 때의 소화율 변화에 결정적인 영향을 미침을 알 수 있었으며, 4가지의 효소를 이용한 multi-enzyme digestion technique은 수산식품단백질의 소화율 변화를 측정함에 있어 아주 민감하고 유용한 방법으로 판명되었다.

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한우 난포란의 체외성숙 배지와 세포질 내의 단백질 변화 (The Changes of Quantity and Quality of Proteins in Medium and Cytoplasm during In Vitro Maturation of Bovine Oocytes)

  • 박용수;박현정
    • Reproductive and Developmental Biology
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    • 제29권3호
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    • pp.187-191
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    • 2005
  • 본 연구는 한우 난포란이 체외성숙된 환경의 변화를 단백질 측면으로부터 검토하기 위하여 체외성숙 배지와 세포질내 단백질 변화와 종류를 검토하였다. 그 결과 배지 내의 단백질 발현량은 배양 4.5시간째까지 감소하였고, 배양 13.5시간째까지는 변화가 없었다. 그러나 배양 $13.5\~18$시간 사이에 증가한 후 배양 18시간 이후에 다시 감소하는 경향이었다. 세포질내의 단백질 발현량은 배양 4.5시간째까지 증가하였고 배양 9시간째까지 급격히 감소하였다. 배양 9시간째부터 18시간째 까지는 단백질 발현량이 유사한 경향이었으나 배양 18시간째부터 24시간째까지 다시 증가하였다. 한편 체외성숙한 배지와 세포질을 2차원 전기영동하여 각각 298개 및 35개의 단백질 spot을 확인하였고, 그 중 배지에서는 28개, 세포질에서는 5개의 spot이 유의적인 변화를 확인하였다. 이들 spot 대한MALDI-TOP분석으로 배지와 세포질에서 각각 8개 및 1개의 단백질을 동정하였다. 그 종류는 aldose reductase, alpha enolase, apolipoprotein A-1 precursor, 43M1a collectin precursor, heat shock 27kDa protein, plasminogen activator inhibitor-1 precursor, thrombospondin 1 transitional endoplasmic reticulum ATPase 및 $\beta$-tubulin이었다.

붕어고음 잔사분말을 첨가한 쇠고기 Patty의 단백질 품질 평가 (Protein Nutritional Qualities of Beef Patties Added with Crucian Carp Extraction Residue)

  • 김지영;황은영;이진화;류홍수
    • 한국식품영양과학회지
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    • 제30권3호
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    • pp.488-493
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    • 2001
  • The know the possibility in development of the low-fat beef patty models using crucian carp9 extraction residues (CCER, freeze dried powder : 5%, 10%, 15%), those protein nutritional quality, texture, color and sensory properties were investigated. About 13∼23% (on dry basis) of lipid in control was reduced in cooked beef patties with the higher addition ratios of CCER. In vitro protein digestibility was not changed in raw patties before cooking but 2∼4% higher digestibility was revealed in cooked patties. Computed protein efficiency ratio (C-PER) and discriminant computed protein efficiency ratio (DC-PER) of beef patties containing CCER were almost same as control. Lightness and red color value of both (raw and cooked) beef patties were decreased with the higher CCER addition ratios but brown color value of cooked samples were similar to control. Stronger hardness was noted in all beef patties containing CCER significantly (p<0.05). Consumer's acceptability were generally decreased by addition of CCER, but 10% level could be recommendable in beef patty processing.

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Production, Nutritional Quality and In vitro Methane Production from Andropogon gayanus Grass Harvested at Different Maturities and Preserved as Hay or Silage

  • Ribeiro, G.O. Jr.;Teixeira, A.M.;Velasco, F.O.;Faria, W.G. Junior;Pereira, L.G.R.;Chaves, A.V.;Goncalves, L.C.;McAllister, T.A.
    • Asian-Australasian Journal of Animal Sciences
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    • 제27권3호
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    • pp.330-341
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    • 2014
  • Andropogon gayanus is an important grass due to its high biomass production, drought tolerance and favorable growth on low fertility acidic soils. Currently, there is little research on the impact of growth stage on the nutritional quality or the degree of $CH_4$ production that may arise from this forage during ruminal fermentation. The objectives of this study were to determine the effects of regrowth stage of A. gayanus on its chemical composition, in vitro production of gas and CH4, as well as in vitro dry matter (DM) digestibility when grown under tropical Brazilian conditions and conserved as hay or as silage. The nutritional value of A. gayanus grass declined with increasing maturity; however digestible DM yield linearly increased. After 112 d of regrowth, A. gayanus produced higher quality silage (higher lactate and lower pH and butyrate content) and higher DM yield. However, the low levels of crude protein at this time would make protein supplementation a necessity for proper rumen fermentation. No differences in $CH_4$ kinetic parameters were found with advancing maturity or preservation method (hay or silage).