共查询到19条相似文献,搜索用时 78 毫秒
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以猪小肠黏膜提取肝素后的滤渣为原料,利用木瓜蛋白酶和中性蛋白酶对猪肠膜进行双酶分阶段水解。在单因素试验的基础上采用正交试验对水解条件进行优化。结果表明:木瓜蛋白酶和中性蛋白酶双酶分阶段水解的最佳酶解工艺为:木瓜蛋白酶-中性酶的加酶量比为1:2,总酶量8000U/g蛋白,底物浓度为5%,pH7.0,温度55℃,酶解时间3h。通过喷雾干燥生产出成品,其蛋白质含量为37.5%。 相似文献
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《中国兽医学报》2017,(10):1957-1963
为探讨中药复方参术汤干预猪传染性胃肠炎病毒(transmissible gastroenteritis virus,TGEV)诱导猪小肠黏膜上皮细胞(SIEC)凋亡的机制。本试验用TGEV感染SIEC进行体外试验。试验分为复方参术汤组、对照组、TGEV组、苦参碱组,分别于加药后2,4,8,12,24,48,72h收集样本,应用qRT-PCR检测Bcl-2与Bax mRNA转录水平,Western blot检测Bcl-2、Bax、Bid、Cyt-c、Caspase-9和Caspase-3的蛋白表达水平。结果显示,与TGEV组相比,复方参术汤下调TGEV感染SIEC的Bax、Caspase-9、Caspase-3、Cyt c及Bid蛋白表达;复方参术汤极显著上调Bcl-2mRNA的转录(P<0.01),极显著下调Bax mRNA的转录(P<0.01)。结果表明,复方参术汤能够抑制引起细胞凋亡的线粒体通路,从而预防TGEV引起的SIEC凋亡。 相似文献
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自从1989年起,猪的SIS已经成功应用于各种动物实验中,包括腹壁的修复、膀胱的重建、硬脑膜的重建、腱的修补和会阴疝的修补等手术。最近有报道将SIS应用于小动物眼科临床上,并且取得了满意的疗效。 相似文献
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芦笋下脚料饲喂生长育肥猪的试验效果山东省章丘市畜牧局马玉胜芦笋下脚料乃是芦笋用来加工罐头后的副产品。它富含高而全的营养物质,据济南粮油食品罐头厂提供的资料来看,除含有92%的水分外,还含有1.62%~3.0%的蛋白质,0.71%~0.96%的非蛋白氮... 相似文献
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《中国兽医学报》2019,(5):956-961
本试验旨在探究大肠杆菌热敏肠毒素处理(heat labile enterotoxin,LT)后,猪小肠黏膜微血管内皮细胞活力及细胞因子ET-1、IL-1β水平的变化。首先采用D-半乳糖凝胶树脂层析法提取猪E coli LT,利用SDS-PAGE验证蛋白纯度,并用Vero细胞检验提取物的生物学活性,最后采用CCK-8法检测LT对猪小肠黏膜微血管内皮细胞活力的剂量时间效应,ELISA法检测细胞培养上清中ET-1、IL-1β水平的变化。结果表明:所提蛋白为AB_5结构的LT,且具有良好的生物学活性;0.01 mg/L的提取蛋白作用3 h后便可显著降低小肠黏膜微血管内皮细胞的活性(P0.05);作用细胞6 h后,0.01,0.1和10 mg/L LT组细胞培养上清中ET-1的含量显著升高(P0.05),0.01和1 mg/LLT组IL-1β的含量显著升高(P0.05)。结果表明,E coli LT可以显著改变猪小肠黏膜微血管内皮细胞的活力及细胞因子的表达。 相似文献
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早期断奶仔猪肠黏膜的营养调控 总被引:2,自引:0,他引:2
肠黏膜的发育与成熟状况是制约幼畜快速生长的关键因素。早期断奶仔猪肠黏膜免疫力较低,容易遭受饲粮抗原的刺激而引起肠黏膜过敏性损伤,诱发仔猪断奶后腹泻。通过肠黏膜营养调控技术,补充肠黏膜能量营养, 促进肠黏膜的发育与成熟,修补断奶引起的肠黏膜损伤,可以从根本上减轻仔猪断奶后腹泻的发生。本文对早期断奶引起的肠黏膜形态变化以及有利于修复受损伤肠黏膜的营养物和调控因子进行了综述。 相似文献
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外加酶提高发酵豆粕蛋白质水解度的研究 总被引:2,自引:0,他引:2
在枯草芽孢杆菌发酵豆粕的工艺基础上添加外源蛋白酶进行优化,以蛋白质水解度为指标,试验得到酶添加量、接种量、料水比、温度、时间5个单因素的最佳条件为:加酶量120U/g,接种量1%、料水比1:1.2、温度35℃、发酵时间48h。对5个因素进行正交优化试验,得到优化发酵方案为:加酶量50U/g、接种量1.5%、料水比1:1.2、温度35℃、发酵时间48h,发酵豆粕水解度从对照的16.25%提高到37.29%,提高了1.3倍。 相似文献
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采用组织学和图像分析技术,研究了小鼠经腹腔注射交感神经损毁剂6-羟多巴胺后小鼠体重和小肠绒毛长度、V/C比值、绒毛宽度以及黏膜厚度的变化。结果表明,注射6-羟多巴胺组与对照组小鼠相比,体重下降(约3.4%);小肠绒毛变短(5.6%~19.4%),V/C比值减少(0.88%~24.1%),绒毛变窄(8.8%~24.7%)、黏膜厚度变薄(4.4%~16.9%),其中空肠的绒毛长度和黏膜厚度减少较明显,而十二指肠和回肠的V/C比值和绒毛宽度减少较明显。提示交感神经的活动可影响小肠的黏膜结构,从而影响肠道的消化吸收功能。 相似文献
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以蒙脱石(MMT)为原料,通过阳离子交换反应合成载铜蒙脱石(MMT-Cu)。为探讨载铜蒙脱石对肠粘膜屏障功能的影响,采用体外培养的单层Caco-2细胞模型为研究对象,以细菌易位数量和肠绒毛损伤程度做为指标进行研究。结果表明:MMT-Cu可明显减少(P〈0.01)E.coilK88、S.choleraesuis侵入到Caco-2细胞内的数量,与对照组相比,下降了2logCFU/mL~3log CFU/mL;并能显著降低(P〈0.01)LDH的释放量。扫描电子显微镜下观察可见,加入MMT-Cu一段时间后,当E.coil K88和S.choleraesuis粘附Caco-2细胞时,微绒毛依旧排列整齐、致密,可见肠上皮细胞保持完好。结果表明,MMT-Cu对肠粘膜具有屏障作用,可作为一种消化道粘膜保护剂。 相似文献
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The influence of Ringer's lactate or HES 130/0.4 administration on the integrity of the small intestinal mucosa in a pig hemorrhagic shock model under general anesthesia
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Ana Liza Ortiz DVM PhD Helena Vala DVM PhD Carlos Venâncio DVM PhD João Mesquita DVM PhD Aura Silva DVM PhD Jose Manuel Gonzalo‐Orden DVM PhD David Ferreira DVM PhD 《Journal of Veterinary Emergency and Critical Care》2017,27(1):96-107
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纳米载铜蒙脱石对断奶仔猪生长、肠道菌群及其肠黏膜形态的影响 总被引:6,自引:0,他引:6
选用128头健康“杜长大”三元杂交断奶仔猪,随机分为对照组、CuSO4组、纳米蒙脱石(MMT)组和MMT-Cu组,分别饲喂基础日粮(对照组)、基础日粮+78 mg/kg Cu2+(CuSO4.5H2O,相当于MMT-Cu中Cu2+的量)、基础日粮+2.0 g/kgMMT、基础日粮+2.0 g/kgMMT-Cu。结果表明,与对照组相比,MMT-Cu组能显著提高(P<0.05)断奶仔猪的平均日增重、饲料转化效率及小肠绒毛高度、绒毛高度与隐窝深度的比值,显著降低(P<0.05)腹泻率及小肠、结肠内容物中大肠杆菌和沙门氏菌的数量;而MMT组也显著降低(P<0.05)仔猪腹泻率,提高(P<0.05)小肠绒毛高度和绒毛高度与隐窝深度的比值。与MMT组或CuSO4组相比,MMT-Cu组能显著(P<0.05)提高断奶仔猪的平均日增重和饲料转化效率(P<0.05),显著降低了(P<0.05)小肠和结肠内容物中大肠杆菌和沙门氏菌的数量。 相似文献
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Jingjing Xie Zhongcheng Wang Hu Cui Hao Nie Tietao Zhang Xiuhua Gao Yu Qiao 《Journal of animal physiology and animal nutrition》2020,104(1):230-236
To investigate the effects of different levels of enzymatic hydrolysate of dietary locust bean gum on nutrient digestibility, intestinal morphology and microflora of broilers, a total of 768 one-day-old Arbor Acres (AA) broiler chicks were randomly divided into 6 treatments with 8 replicates per treatment and 16 birds per replicate. The treatments were as follows: (1) CON, basal diet; (2) ANT, basal diet +62.5 mg/kg flavomycin; (3) LBG, basal diet +0.1% locust bean gum; (4) ELBG-0.1, basal diet +0.1% enzymatic hydrolysate of LBG; (5) ELBG-0.2, basal diet +0.2% enzymatic hydrolysate of LBG; and (6) ELBG-0.3, basal diet +0.3% enzymatic hydrolysate of LBG. The digestibilities of ether extract, crude protein and dry matter were increased (p < .01) in broilers fed the ELBG-0.3 diet compared with the CON and LBG diets on day 21. Duodenal villus height and the ratio of the villus height to crypt depth were greater (p < .01) in broilers fed the ELBG-0.3 diet than the CON, ANT and LBG diets. Jejunum villus height was higher (p < .05) in broilers fed the ELBG-0.2 and ELBG-0.3 diets than the CON diet. The number of caecal Escherichia coli was reduced (p = .01) in broilers fed the ELBG-0.2 and ELBG-0.3 diets compared with the CON diet. The number of caecal Lactobacilli was greater (p < .05) in broilers fed the ELBG-0.3 diet than the CON and ANT diets. In summary, the addition of 0.3% locust bean enzymatic hydrolysate can increase the surface area of intestinal villi and the number of beneficial bacteria, inhibit the proliferation of harmful bacteria, maintain the balance of intestinal microflora and improve the digestibility of nutrients. 相似文献
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YU Quan-fa WU Jin-song ZHU Li-bin WANG Hai-xia QU Dao-feng HAN Jian-zhong 《中国畜牧兽医》2015,42(12):3261-3267
This experiment was aimed to study the protease properties produced by Bacillus subtilis JNB001 via the index of protease activity to investigate the effects of pH,temperature and other factors on the enzymatic reaction,and the ability of the crude enzyme solution to hydrolyze various animal protein was measured by the degree of hydrolysis.The results showed that the most suitable pH of reaction was 8.0 and the temperature was 45 ℃.The crude enzyme solution in the range of pH 5.5 to 9.0 was relatively stable,while it was not suitable for the preservation of the enzyme solution when pH was over 9.0.At 45 ℃ it had good thermal stability when exceed 50 ℃ for 10 min, the residual activity had been less than 60%.Metal ions such as Ca2+ and Mg2+,reducing agent like DTT,surfactant as Tween-80,etc.could greatly improve the enzyme activity.On the opposite,Fe2+ and Cu2+ as well as other ions,metal chelator EDTA,denaturant SDS and other materials could inhibit the protease activity.The Km was 6.43 mg/mL,and Vmax was 47.39 μg/min.It had a range of reaction pH from 7.0 to 9.0 and temperature from 40 to 50 ℃ in the situation for different protein substrates.The crude enzyme solution could hydrolyze pig hair,pig nail,hair removal of cowhide,gelatin and other hard protein substances.The results provided the strong date support for the Bacillus subtilis JNB001 which could be used in dead livestock harmless biological treatment system and other aspects of industrial applications. 相似文献