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排序方式: 共有157条查询结果,搜索用时 15 毫秒
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为研究牛蒡苷元在仔猪体内的药物动力学特征,了解其在仔猪体内的吸收、分布、转化和排泄规律,为新兽药的研发和临床用药提供理论参考依据。选取健康仔猪8头(30.0±5.0 kg),以2.0 mg/kg.bw的牛蒡苷元静脉注射给药,不同时间点前腔静脉采血,采用HPLC法对猪血浆中牛蒡苷元的浓度进行分析。牛蒡苷元静脉注射后,符合无吸收二室模型,主要药动学参数为:分布半衰期(t1/2α)0.166±0.022 h;消除半衰期(t1/2β)3.161±0.296 h;表观分布容积(Vd)0.231±0.033 L/kg;清除率(CLb)0.057±0.003 L/(h·kg);药时曲线下面积(AUC)1.189±0.057 μg·h·mL-1。由此可知,牛蒡苷元静脉注射后在仔猪体内分布迅速、分布组织较少、代谢消除较快。 相似文献
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(目的和方法)为研究添加胰岛素对IUGR新生仔猪胰腺重量、酶活性的影响,试验选择初生IUGR仔猪15头,分为新生对照组(N)、牛乳组(M)和试验组即牛乳添加胰岛素(60 IU/L)组(I),人工饲喂3 d后宰杀取样。(结果)结果显示,与N组相比,饲喂3 d后,M组和I组仔猪胰腺重量、胰腺重/体重、蛋白质含量、DNA含量、RNA含量、胰淀粉酶活性、胰脂肪酶总活性、胰高血糖素总含量均不同程度提高,而胰总蛋白水解酶活性、胰蛋白酶活性、胰糜蛋白酶总活性、胰腺胰岛素总含量均不同程度降低,变化较明显。与M组相比,I组胰腺蛋白质含量、蛋白质/DNA比值分别提高了61.43%、60.54%(P0.01);I组胰总蛋白水解酶活性、胰淀粉酶活性、胰脂肪酶总活性、胰腺胰岛素总含量、胰高血糖素含量分别提高了10.59%、10.40%、9.37%、14.30%、12.30%(P0.05);胰腺重、胰腺重/体重、胰腺DNA含量、RNA含量、RNA/DNA比值也不同程度提高(P0.05);而I组与M组间胰蛋白酶活性、胰糜蛋白酶活性差异不显著。(结论)表明IUGR仔猪生后胰腺生长发育较迅速,添加胰岛素能在一定程度上刺激IUGR仔猪胰腺细胞增殖和增大,能显著促进IUGR仔猪胰腺蛋白质合成和沉积,有刺激胰腺内外分泌部发育、提高胰腺酶活性提高、刺激组织激素分泌的趋势,对IUGR仔猪出生后胰腺的生长具有一定的补偿作用。 相似文献
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Jianjun Zang Jingshu Chen Ji Tian Aina Wang Hong Liu Shengdi Hu Xiangrong Che Yongxi Ma Junjun Wang Chunlin Wang Guanghua Du Xi Ma 《畜牧与生物技术杂志(英文版)》2014,5(1):39
The objective of this study was to evaluate the effects of supplemental magnesium (Mg) on the performance of gilts and parity 3 sows and their piglets. Fifty-six gilts (Trial 1) and 56 sows (Trial 2) were assigned to one of 4 treatments according to their mating weight, respectively. The treatments comprised corn-soybean meal based gestation and lactation diets (0.21% magnesium) supplemented with 0, 0.015, 0.03, or 0.045% Mg from mating until weaning. The results showed that magnesium supplementation significantly (P < 0.05) reduced the weaning to estrus interval in both gilts and sows. There were significant effects (P < 0.05) of supplemental magnesium on the total number of piglets born, born alive and weaned in sows. In late gestation and lactation, the digestibility of crude fiber (quadratic effects, P < 0.05), and crude protein (P < 0.05), were significantly influenced by magnesium in gilts and sows, respectively. There were differences among the 4 groups in terms of the apparent digestibility of dry matter and crude fiber in sows (P < 0.05) during both early and late gestation. The apparent digestibility of gross energy was increased for sows in late gestation (P < 0.05), and lactation (quadratic effects, P < 0.05). At farrowing and weaning, serum prolactin levels and alkaline phosphate activities linearly increased in sows as the Mg supplementation increased (P < 0.05). Serum Mg of sows at farrowing and serum urea nitrogen of sows at weaning was significantly influenced by Mg supplementation (P < 0.05). The Mg concentration in sow colostrum and the serum of their piglets were increased by supplemental magnesium (P < 0.05). In addition, growth hormone levels were linearly elevated (P < 0.05) in the serum of piglets suckling sows. Our data demonstrated that supplemental magnesium has the potential to improve the reproduction performance of sows, and the suitable supplemental dose ranged from 0.015% to 0.03%. 相似文献
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为观察抗菌肽对母猪生产性能及仔猪生长性能的影响.试验于母猪预产期前30天开始在饲料中添加0.3%抗菌肽,观察母猪产仔及仔猪的健康状况.结果表明:试验组与对照组相比:死胎率降低了33.3%、木乃伊率降低100%、初生成活率提高6.0%、初生平均头重提高1.3%、窝平均存活数提高32.1%、断奶成活率提高3.3%、断奶平均头重提高25.1%、平均净增重提高32.8%.说明抗菌肽饲料添加剂可有效提高母猪的生产性能和哺乳仔猪的生长性能. 相似文献
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F.O. Opapeju M. Rademacher R.L. Payne D.O. Krause C.M. Nyachoti 《Livestock Science》2010,131(1):58-64
Forty piglets (average body weight = 5.32 kg) were used to investigate the effect of dietary crude protein (CP) content on immunological responses following a challenge with enterotoxigenic Escherichia coli (ETEC) K88. Pigs, housed 4 per pen, were randomly allotted to 2 diets: 1) a high, 225 g/kg CP diet (HCP) or 2) a low, 176 g/kg CP diet (LCP) supplemented with crystalline amino acids. Pigs were orally challenged with 6 mL of an ETEC K88 suspension containing 1010 cfu/mL on d 8 after weaning. Blood samples were collected from 10 pigs (1 pig/pen) on d 7 (at weaning), −24 h, 8 h, 72 h and 7 d after the challenge for determination of plasma urea N (PUN) and serum concentrations of tumor necrosis factor alpha (TNF-α) and interleukin 1 beta (IL-1β) and haptoglobin (Hp). Tumor necrosis factor alpha, IL-1β and Hp were measured as indicators of inflammatory responses. The concentrations of serum TNF-α at 8 h, 72 h and 7 d after challenge were similar to the level observed at 24 h before challenge but higher (P < 0.05) than the weaning level. Pigs fed the LCP diet had lower (P = 0.032) concentrations of IL-1β (72 vs. 116 pg/mL) at 8 h post-challenge compared with those fed the HCP diet. Likewise, pigs fed the LCP diet tended to have lower (P = 0.088) concentration of Hp (9 vs. 25 mg/dL) compared with those fed the HCP diet at 8 h post-challenge. Compared with the weaning concentration, PUN concentration at 72 h after ETEC challenge was higher (P < 0.05) in pigs fed the HCP diet. The results indicate that the LCP diet supplemented with crystalline amino acids reduced inflammatory responses, as indicated by serum IL-1β, in piglets infected with ETEC K88. 相似文献
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[目的]研究不同种类寡糖对仔猪免疫力和生产性能的影响。[方法]选择75头7日龄二元杂交仔猪(大约克夏×荣昌猪),随机分为5组,每组15头。分别在每组基础日粮中添加7.5g/kg的异麦芽寡糖、果寡糖、甘露寡糖和混合寡糖,同时设对照组。试验期为53d。在试验过程中,观察临床症状和腹泻情况,每周称重,并记录采食量。饲喂至30日龄和60日龄时,前腔静脉采血,测定免疫指标。[结果]添加7.5g/kg的异麦芽寡糖或果寡糖能显著提高30日龄仔猪的细胞免疫功能(P〈0.05),前者还能显著提高体液免疫功能;添加7.5g/kg的甘露寡糖能显著提高60日龄仔猪的细胞和体液免疫功能(P〈0.05),对仔猪生产性能的促进效果最好,且腹泻率最低。[结论]不同种类寡糖对仔猪免疫力和生产性能的影响存在差异。 相似文献
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本试验通过研究免疫状况良好的母猪群所产仔猪获得母源抗体的方式,仔猪体内母源抗体的持续时间,仔猪不同免疫程序的免疫效果等,从而制定出仔猪猪瘟的最佳免疫程序。 相似文献