共查询到20条相似文献，搜索用时 78 毫秒
1.
日粮锌水平对断奶仔猪血清酶学指标的影响 总被引：3，自引：0，他引：3
锌是体内多种酶的组成成分和特异性或非特异性激活因子。乳酸脱氢酶(LDH)能够调节缺氧环境下乳酸的分解与合成,锌是合成碱性磷酸酶(ALP)必需的金属离子,与该酶活性呈正相关,许多研究认为(姜树林,1 986 ;Hill等,1 983)碱性磷酸酶和乳酸脱氢酶活性随日粮锌水平呈现规律性变化。谷草转氨酶(GOT)和谷丙转氨酶(GPT)则可反映肝脏和心脏的功能,可从这两种酶的活性变化看出高剂量锌是否会对肝脏和心脏功能产生损伤。本试验研究日粮不同水平锌对仔猪血清酶学指标的影响,为仔猪断奶后补锌提供相应的理论依据。1 材料与方法1 1 试验仔猪与处理… 相似文献
2.
碱性磷酸酶(Alkaline phosphatase,以下简称ALP),是适于在pH_(9-10)条件下水解许多非特异性磷酸单脂而使磷酸游离的磷酸脂酶的总称。现在已知,血清ALP的存在可因脏器起源不同而异,特别在人中阐明了癌特异性ALP和胎盘癌ALP(Caroinoplacental alkaline phosphatase)之后,对该酶的临床诊断评价正在急剧增高。 相似文献
3.
本试验旨在研究不同锌源[蛋氨酸锌(Zn-Met)或硫酸锌(ZnSO_4)]及水平对生长肥育猪血清酶活性和组织器官锌沉积量的影响。选用体重[(33.70±2.76)kg]相近的"杜×长×大"生长肥育猪32头,随机分成4组,每组8个重复,每个重复1头猪。对照组饲喂基础饲粮,试验组在基础饲粮中分别添加40 mg/kg Zn-Met、40 mg/kg ZnSO_4和80 mg/kg ZnSO_4(以锌元素计)。预试期7 d,正试期72 d,分30~60 kg和61~90 kg 2个阶段。结果表明:1)与对照组相比,饲粮添加40 mg/kg Zn-Met显著降低了生长肥育猪血清谷丙转氨酶(ALT)、谷草转氨酶(AST)和乳酸脱氢酶(LDH)活性(P0.05),显著提高了血清碱性磷酸酶(ALP)活性(P0.05);饲粮添加40 mg/kg ZnSO_4显著降低了血清ALT和LDH活性(P0.05);饲粮添加80 mg/kg ZnSO_4显著降低了血清ALT活性(P0.05),显著提高了血清ALP活性(P0.05)。40 mg/kg Zn-Met组生长肥育猪血清ALT、AST和LDH活性最低,血清ALP活性最高。2)与对照组相比,饲粮添加40 mg/kg Zn-Met显著提高了生长肥育猪血清锌含量(P0.05),40 mg/kg Zn-Met组血清锌含量最高。3)与对照组相比,饲粮添加40 mg/kg Zn-Met或40、80 mg/kg ZnSO_4对生长肥育猪脾脏、胰脏、毛和肌肉锌沉积量均无显著影响(P0.05),但显著提高了肝脏和骨锌沉积量(P0.05)。综上所述,饲粮添加40 mg/kg Zn-Met或40、80 mg/kg ZnSO_4可改善生长肥育猪血清酶活性、血清锌含量及肝脏和骨锌沉积量。本试验条件下,生长肥育猪饲粮添加40 mg/kg Zn-Met为宜。 相似文献
4.
试验旨在通过研究饲粮中不同水平的锌对蛋雏鸭的生长性能和血液生化指标的影响,确定其在饲粮中适宜的添加量。试验采用单因素完全随机分组设计,选择1日龄金定蛋雏鸭180只,随机分成5组,每组6个重复,每个重复6只鸭。第Ⅰ组(对照组)饲喂基础饲粮,第Ⅱ～Ⅴ组在玉米-豆粕型基础饲粮基础上分别添加20、40、60、80 mg/kg锌(ZnSO4.7H2O)。试验期为4周。结果表明,适量添加锌有利于提高雏鸭的生长性能、促进蛋白代谢、提高机体的免疫力和增加含锌酶碱性磷酸酶(ALP)和乳酸脱氢酶(LDH)的含量。通过对差异显著的指标与锌添加量间拟合二次回归曲线确定的蛋雏鸭基础饲粮中锌的适宜添加量为51.8 mg/kg。 相似文献
5.
《经济动物学报》2021,25(3):167-172
为研究低氧胁迫对鲫生理状态的影响,选取90尾鲫进行低氧胁迫试验。结果显示,低氧胁迫12 h后,鲫血液中血红蛋白(HB)浓度、血糖(GLU)浓度、Na-K-ATP酶(NKA)、乳酸脱氢酶(LDH)、碱性磷酸酶(ALP)和酸性磷酸酶(ACP)活力均显著高于对照组(P0.05)。肝脏中ALP和ACP,鳃中ALP和ACP,心脏中LDH、ALP和ACP活力均显著高于对照组(P0.05)。肝脏中LDH、鳃中LDH、脑中LDH、ALP和ACP酶活力升高,但与对照组差异不显著(P0.05)。恢复正常溶氧12 h后,血液中HB浓度、GLU浓度、NKA、LDH、ALP和ACP酶活力仍显著高于对照组(P0.05)。肝脏中ALP和ACP、鳃中ALP和ACP及心脏中LDH仍显著高于对照组(P0.05)。研究表明,低氧胁迫能使鲫血红蛋白和血糖浓度升高,并影响血液、肝脏、鳃、心脏和脑中能量代谢与转化的相关酶活力。这些指标对研究鲫的低氧适应机制具有重要意义,可以为相关研究提供基础资料。 相似文献
6.
杆菌肽锌在畜禽养殖中的应用及其安全性 总被引：1，自引：0，他引：1
杆菌肽锌 ( Zinc Bacitracin)属多肽类畜禽专用抗生素 ,是由特雷斯氏枯草杆菌和地衣芽孢杆菌产生的含有噻唑环的多肽复合体与对杆菌肽有激活作用的锌络合而成。自 1 945年由哥伦比亚大学 B.H.Johnson首次发现以来就以其高效、无毒副作用、无残留、不产生抗药性和交叉抗药性等优点被广泛应用于畜禽养殖业。杆菌肽锌对畜禽能够起到显著的抑菌促生长作用 ,主要源于其独特的三重抑菌机理 :1杆菌肽锌是类脂质焦磷酸的特异性抑制剂 ,能抑制细菌细胞壁合成的脱磷酸化过程 ,影响磷脂载体的转运及向细胞壁支架输送粘肽 ,从而抑制细胞壁的合成 ;2与… 相似文献
7.
<正> 锌是目前已知的15种微量元素中的一种,称之为必需微量元素。必需微量元素不但是构成机体内酶、激素、维生素等成分,而且还参加了这些活性物质的合成过程,现在所知的80多种酶的活性均与锌有关。锌是碳酸酐酶、羧基肽酶、碱性磷酸酶、乳酸脱氢酶、谷氨酸脱氢酶、尿酸酶及胰岛素的组成成分。肝脏是锌的重要贮存场所。锌通过 相似文献
8.
《黑龙江畜牧兽医》2016,(23)
为了进一步检测多拉菌素浇泼剂应用的安全性,试验检测了多拉菌素浇泼剂对小鼠外周血谷丙转氨酶(ALT)、谷草转氨酶(AST)、总蛋白(TP)、尿素氮(BUN)、肌酐(CRE)、碱性磷酸酶(ALP)、乳酸脱氢酶(LDH)、肌酸激酶(CK-NAC)指标及外周血常规指标的影响。结果表明:多拉菌素浇泼剂高、中、低三个剂量组小鼠血清中的ALT、AST、TP、BUN、CRE、ALP、LDH、CK-NAC等生化指标与对照组相比均无显著性差异。在治疗量(5 mg/kg)和3倍治疗量(15 mg/kg)时,多拉菌素对外周血白细胞总数和淋巴细胞比例有正面影响,在一定程度上能提高小鼠的非特异性免疫应答。说明多拉菌素浇泼剂对小鼠的各个器官、组织和代谢无损伤性作用和不良影响,对小鼠的免疫功能没有不良影响。 相似文献
9.
高锌在断奶仔猪生产中的应用 总被引：6，自引：0，他引：6
锌是动物机体内的必需微量元素,它自从Tucker和Salmon(1955)首先证实锌为猪生理所必需物质,缺乏会出现皮肤不完全角化症。众多的研究表明,锌广泛分布于机体组织中,是DNA聚合酶、RNA聚合酶、碱性磷酸酶、乳酸脱氢酶、碳酸酐酶、羟墓酶、谷氨酸脱氢酶等许多重要酶的组分,参与机体蛋白质合成和核糖核酸、脱氧核糖核酸和其它物质的代谢。同时对促进骨骼、角质生长,强化垂体前叶激素的活性,增强机体免疫和抗感 相似文献
10.
11.
12.
13.
魏静 《四川畜牧兽医学院学报》2009,(4):28-32
在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。 相似文献
14.
本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。 相似文献
15.
16.
以国际标准强毒Ｒ株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离ＭＧ,并收集感染鸡所产蛋分离ＭＧ。结果表明,人工感染４８小时后上、下呼吸道及肺已被全面感染,９６小时气囊已被感染,１２０小时输卵管已能分离到ＭＧ,卵巢始终分离不到ＭＧ。人工感染鸡自１４４小时便能在其所产蛋中分离出ＭＧ。药物治疗能在７２小时内消除感染,油乳剂苗则需２４天后逐渐降低蛋内ＭＧ分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内ＭＧ,但以研制的种蛋浸泡剂药浴效果为最好。 相似文献
17.
REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air. 相似文献
18.
19.
20.
Effects of size of ingestively masticated fragments of plant tissues on kinetics of digestion of NDF
Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo. 相似文献