Preparation and Characterization of Protein Hydrolysates From Little Loligo Squid (Uroteuthis chinensis)     

Yu-xue Wu  Wang Li 《Journal Of Aquatic Food Product Technology》2013,22(1):42-51

Research on the little loligo squid (Uroteuthis chinensis) protein hydrolyzed by papain and Flavourzyme and characterization of hydrolysates was carried out in this article. The optimum hydrolysis conditions of papain were obtained by orthogonal experiments, and the influence factors on the degree of hydrolysis such as enzyme/substrate ratio, hydrolysis time, pH, and temperature were investigated. The effect of Flavourzyme on the degree of hydrolysis was also studied. The characteristics of freeze-dried hydrolysates such as yield, moisture, nitrogen recovery, molecular mass distribution, and amino acid composition were determined. The results showed that papain and Flavourzyme could hydrolyze the little loligo squid protein efficiently, and the degree of hydrolysis was up to 25.82% under the optimum hydrolysis conditions. The average molecular mass of hydrolysates obtained with papain and Flavourzyme was 1,246 Da, and the low molecular mass peptides were the main fraction of hydrolysates. The yield, moisture, and nitrogen recovery of freeze-dried hydrolysates was 19.8, 4.4, and 74.2%, respectively. Compared with suggested patterns of amino acid requirements by the Food and Agriculture Organization of the United Nations/World Health Organization (FAO/WHO), the hydrolysates of the little loligo squid had high nutritional value, and was a potential nutritious supplement used in various food products.  相似文献   

牛初乳酶解物对离体犊牛小肠上皮细胞增殖和吸收功能的影响   总被引：6，自引：0，他引：6  

马玉敏  王恬  许若军 《动物营养学报》2002,14(2):9-13

初乳经胃蛋白酶水解处理90分钟后所产生的水解物对离体犊牛小肠上皮细胞有明显的促增殖作用(P<0.01) ,而初乳经胰蛋白酶处理则不表现促增殖活性。初乳酶解物对促进细胞吸收葡萄糖的作用随着酶解处理时间的延长而逐渐增强 ,初乳经胰蛋白酶水解处理90分钟或经胃蛋白酶水解处理150分钟时的产物对细胞吸收葡萄糖的促进作用分别达到最强(P<0.01)。试验结果表明 ,初乳酶解物即小分子蛋白质(肽)具有刺激离体小肠上皮细胞增殖和功能发育的活性。  相似文献   

脱钙处理对鱼鳞蛋白酶解效果及其持钙能力的影响   总被引：1，自引：0，他引：1  

慕现敏  黄海  刘润阳  赵元晖  刘尊英 《农产品加工．学刊》2012,(8):5-8

研究了盐酸脱钙对鱼鳞蛋白酶解效果及其酶解产物持钙活性的影响。结果表明,浓度0.4 mol/L的HCl溶液,鱼鳞粉与盐酸的料液比为1∶30,脱钙时间30 min可显著提高鱼鳞蛋白溶出率与胶原蛋白溶出率,脱钙率达87.90%;采用胰蛋白酶、胃蛋白酶与风味蛋白酶分步酶解,酶解产物的持钙能力达13.93 mg(钙)/g(蛋白),是胰蛋白酶酶解产物持钙能力的5.32倍(p<0.01)。当酶解产物蛋白质量浓度为2 mg/mL时,酶解产物与钙离子螯合的最佳条件为:螯合反应温度50℃,pH值6.0,蛋白与CaCl2质量比为6∶1,螯合反应时间40 min。  相似文献   

Characterization of Collagen Enzymatic Hydrolysates Derived from Lizardfish (Synodus fuscus) Scales     

Junde Chen  Ying Liu  Ruizao Yi  Long Li  Ran Gao  Nuohua Xu 《Journal Of Aquatic Food Product Technology》2017,26(1):86-94

Acid soluble collagen was extracted from the scales of lizardfish and characterized with sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and amino acid analysis. After 8 h of collagen hydrolysis, hydrolysates had an estimated degree of hydrolysis (DH) from 4 ± 0.05 to 25 ± 0.63% (p < 0.05). All hydrolysates had angiotensin converting enzyme inhibitory and antioxidant activity. These activity levels showed little change after treatment with gastrointestinal proteases. Results indicated that the lizardfish by-products may be improved by enzymatic treatment with acid-soluble collagen from lizardfish scales.  相似文献   

微生物发酵对罗非鱼下脚料蛋白酶解液脱腥去苦效果比较   总被引：2，自引：2，他引：0  

曾少葵  杨萍  陈秀红 《南方水产》2009,5(4):58-63

以嗜热链球菌(Streptococus thermophilus)、保加利亚乳杆菌(Lactobacillus bulgaricus)和瑞士乳杆菌(L.helveticus)及2种酿酒酵母菌(Saccharomyces cerevisiae)为菌种,对罗非鱼(Oreochromis niloticus)下脚料蛋白酶解液进行发酵,利用感官评定法,比较不同微生物发酵对酶解液脱腥去苦效果.试验结果表明,乳酸菌脱腥效果优于酵母菌,其中以嗜热链球菌脱腥效果最好,其适宜的发酵条件为接种量10%,发酵温度42℃,发酵时间9 h.微生物发酵去苦效果不明显.  相似文献   

Pectic hydrolysates in the diet of silver catfish (Rhamdia quelen): Growth performance,blood and liver biochemistry,histological parameters and intestinal contents     

Patrícia I. Mombach  Taida J. Adorian  Dirleise Pianesso  Thaís S. dos Santos  Joziane S. de Lima  Silvino S. Robalo  Leila P. da Silva 《Aquaculture Nutrition》2019,25(6):1378-1387

The aim of this study was to investigate the prebiotic potential of pectin hydrolysates that were extracted from agroindustrial waste (apple pomace—AP and passion fruit peel—PFP) and were added to the diet of silver catfish (Rhamdia quelen). A 49‐day biological assay was conducted, and five test diets were evaluated: one diet was a control diet and the other four diets included pectin hydrolysates (2.5 and 5 g/kg). At 49 experimental days, biometric data and biological material were collected to determine the performance, plasma and liver and histological parameters and to evaluate the intestinal contents. The results were analysed by the normality test, which was followed by an analysis of the variance; the treatment means were compared by an orthogonal contrast analysis at a 5% level of significance. The inclusion of 2.5 g/kg apple pomace hydrolysates resulted in a greater production of butyric acid, increased thickness of the muscular layer and higher goblet cell count in the intestine. The inclusion of 5 g/kg apple pomace hydrolysates led to a greater concentration of liver protein. Further studies are needed to increase the knowledge about the use of these additives in the diet of silver catfish and to establish levels that allow greater gains for the species.  相似文献   

响应面分析法优化大豆抗氧化肽水解条件的研究     

刘秀红  张东杰 《黑龙江八一农垦大学学报》2009,21(5):44-49,55

利用响应面法对大豆抗氧化肽酶解反应进行了优化研究。采用5因素5水平的正交旋转组合设计研究了酶解条件对水解液抗氧化性的影响。各因素对抗氧化性的影响依次为pH〉温度〉底物浓度〉加酶量〉时间。采用降维分析方法进行了底物浓度与酶解时间以及加酶量与酶解时间的交互效应分析。优化后的条件为：酶解温度56℃,pH7.0,底物浓度5.0%,加酶量4%,酶解时间4h。在该水解条件下,水解液的抗氧化值达到4120.33μmol·L^-1。为工业化生产提供了工艺参数的参考。  相似文献   

Optimization of Hydrolysis Conditions for the Production of the Angiotensin-I Converting Enzyme Inhibitory Peptides from Sea Cucumber Collagen Hydrolysates     

Zun-Ying Liu  Da Chen  Yi-Cheng Su 《Journal Of Aquatic Food Product Technology》2013,22(2):222-232

The effects of different hydrolysis conditions on the angiotensin-I converting enzyme (ACE) inhibitory properties of giant red sea cucumber (Parastichopus californicus) collagen hydrolysates were investigated. Optimal conditions predicted by central composite rotatable design (CCDR) modeling for producing ACE inhibitory peptides were found to be 54.9°C, 1.76 h and an enzyme to substrate (E/S) ratio of 0.064. Compared with experiments performed under these optimal conditions, the predicted degree of hydrolysis (DH) and ACE inhibitory activities had error rates of 3 to 6%. Under optimum conditions, the molecular weights of collagen hydrolysates were less than 6.5 kDa. Lineweaver-Burk plots suggest that the collagen hydrolysates acted as competitive inhibitors with an inhibition constant (Ki) value of 0.706 mg/mL.  相似文献   

南极磷虾木瓜蛋白酶酶解产物的营养学评价     

黄艳青  陆建学  黄洪亮  高露姣  房文红  陈雪忠  施大卫 《海洋渔业》2012,34(3):324-330

分析了经1.5%木瓜蛋白酶55℃酶解3 h后的南极磷虾(Euphausia superba)蛋白酶解产物(上清和沉淀)的营养组成。结果显示:南极磷虾水解度为44.24%;上清冻干物(FDS)中粗蛋白和总糖含量分别为67.13%和13.91%,其必需氨基酸总量(ΣEAA)、鲜味氨基酸总量(ΣDAA)、牛磺酸Tau含量及F值(支链氨基酸/芳香族氨基酸)较酶解前分别提高了8.96%、6.06%、39.10%和16.67%,表明其氨基酸营养价值较酶解前要高。沉淀冻干物(FDP)中粗蛋白和总糖含量分别为44.49%和10.40%,而粗脂肪含量高达33.28%。FDP中总氨基酸含量(ΣAA)、ΣEAA、ΣDAA、Tau含量及F值均下降,但其ΣEAA在ΣAA中的比例高于40%,且8种EAA含量评分均高于FAO/WHO评分模式要求。脂肪酸分析结果表明,FDP中含有饱和脂肪酸(SFA)8种(44.81%),单不饱和脂肪酸(MUFA)6种(27.55%),多不饱和脂肪酸(PUFA)7种(27.64%),二十碳五烯酸EPA和二十二碳六烯酸DHA含量较丰富。研究认为在本实验条件下通过木瓜蛋白酶酶解南极磷虾得到的FDS和FDP具有较高的利用价值,可开发为人类重要的蛋白来源。  相似文献   

Preliminary observation of growth‐promoting effects of alginate hydrolysates on juvenile Manila clams,Ruditapes philippinarum          下载免费PDF全文

Yasuhiro Yamasaki  Shigeru Taga  Masanobu Kishioka 《Aquaculture Research》2015,46(4):1013-1017

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