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高铜对雏鸡脑组织抗氧化酶活性的影响 总被引：1，自引：0，他引：1
本研究旨在探讨高铜对雏鸡脑组织抗氧化酶活性的影响。将360羽1日龄艾维茵肉鸡健雏随机分为6组,分别喂以对照日粮(10.89 mg.kg-1)和高铜日粮(Cu 100 mg.kg-1,高铜I组;Cu 200 mg.kg-1,高铜Ⅱ组;Cu 400 mg.kg-1,高铜Ⅲ组;Cu 600 mg.kg-1,高铜Ⅳ组;Cu 800 mg.kg-1,高铜V组)6周。试验第14、28、42天每组随机抽取5羽鸡剖杀后,测定脑组织胆碱酯酶(CHE)、单胺氧化酶(MAO)、过氧化氢酶(CAT)、铜锌超氧化物歧化酶(Cu-Zn-SOD)和谷胱甘肽过氧化物酶(GSH-Px)活性。脑组织CHE和CAT活性随日粮铜含量的升高而降低,高铜Ⅱ、Ⅲ、Ⅳ和V组与对照组比较差异极显著(P0.01);脑组织MAO活性随日粮铜含量的升高而升高,高铜Ⅱ、Ⅲ、Ⅳ和V组与对照组比较差异显著或极显著(P0.05或P0.01);脑组织Cu-Zn-SOD和GSH-Px活性,高铜I、Ⅱ组显著或极显著高于对照组(P0.05或P0.01),高铜Ⅲ、Ⅳ和V组极显著降低(P0.01)。日粮铜水平在400~800 mg.kg-1时,脑组织的抗氧化酶活性降低,脑组织的抗氧化功能下降。 相似文献
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本研究旨在探讨日粮铜水平对雏鸭肾脏抗氧化功能的影响。360只1日龄天府肉鸭随机分为6组,分别喂以对照日粮（Cu 8 mg.kg^-1）和高铜日粮（Cu 100 mg.kg^-1,高铜Ⅰ组;Cu 200 mg.kg^-1,高铜Ⅱ组;Cu 400mg.kg^-1,高铜Ⅲ组;Cu 600 mg.kg^-1,高铜Ⅳ组;Cu 800 mg.kg^-1,高铜Ⅴ组）6周。高铜Ⅱ组、Ⅲ组、Ⅳ组和Ⅴ组肾脏组织丙二醛含量、游离脂肪酸含量及羟自由基含量显著升高（P〈0.01）,高铜Ⅴ组肾脏CuZn-SOD活性显著降低（P〈0.01或P〈0.05）。同时,高铜Ⅲ、Ⅳ和Ⅴ组血清铜蓝蛋白（CP）活性和高铜Ⅴ组血清CuZn-SOD活性显著降低（P〈0.01或P〈0.05）,高铜Ⅲ、Ⅳ组血清CuZn-SOD活性降低,但不显著（P〉0.05）。结果表明,日粮铜含量达到或超过400 mg.kg^-1可引起肾脏和血清抗氧化酶活性降低,抗氧化功能受损,肾脏组织自由基和过氧化产物产生过量,造成细胞损伤,最终导致肾脏功能降低。 相似文献
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高铜对雏鸡脑组织氧化状态的影响 总被引：1，自引：1，他引：0
1日龄艾维茵肉鸡健雏360羽,随机均分为6组,分别喂以对照日粮(10.89 mg/kg)和高铜日粮(Cu 100 mg/kg,高铜Ⅰ组;Cu 200 mg/kg,高铜Ⅱ组;Cu 400 mg/kg,高铜Ⅲ组;Cu 600 mg/kg,高铜Ⅳ组;Cu 800 mg/kg,高铜Ⅴ组)6周,观察高铜对脑组织氧化状态的影响.高铜Ⅱ、Ⅲ、Ⅳ和Ⅴ组脑组织MDA含量升高,与对照组比较差异显著或极显著(P<0.05或P<0.01);脑组织铜-锌-超氧化物歧化酶(Cu-Zn-SOD)和谷胱甘肽过氧化物酶(GSH-Px)的活性,高铜Ⅰ、Ⅱ组显著或极显著高于对照组(P<0.05或P<0.01),高铜Ⅲ、Ⅳ和Ⅴ组较对照组极显著降低(P<0.01);高铜Ⅱ、Ⅲ、Ⅳ和Ⅴ组脑组织羟自由基活性升高,与对照组比较差异显著或极显著(P<0.05或P<0.01).同时,血清的MDA含量及Cu-Zn-SOD和GSH-Px的活性变化与脑组织一致.结果表明,日粮铜水平在400 mg/kg及以上时,脑组织的抗氧化功能受损. 相似文献
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1日龄艾维菌肉鸡健雏360羽,随机分为6组,分别喂以对照组日粮(10.89 mg/kg Cu)和高铜日粮(100 mg/kg Cu,高铜Ⅰ组;200 mg/kg Cu,高铜Ⅱ组;400 mg/kg Cu,高铜Ⅲ组;600 mg/kg Cu,高铜Ⅳ组;800 mg/kg Cu,高铜Ⅴ组)6周,观察高铜对雏鸡脑组织和血清一氧化氮(N0)含量及一氧化氮合酶(NOS)活性变化的影响,探讨高铜对雏鸡脑组织的损伤机理.高铜Ⅱ、Ⅲ、Ⅳ和Ⅴ组脑组织和血清NO的含量较对照组显著或极显著升高(P<0.05或P<0.01).NOS的活性随日粮铜含量的升高而升高,各高铜组脑组织NOS的活性较对照组极显著升高(P<0.01);高铜Ⅱ、Ⅲ、Ⅳ和Ⅴ组血清NOS的活性较对照组显著或极显著升高(P<0.05或P<0.01).日粮铜水平在200 mg/kg及以上时,脑组织和血清NO的含量和NOS的活性随日粮铜的含量升高而升高,脑组织因氧化而受损. 相似文献
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高铜对雏鸭肾脏细胞周期和凋亡影响的研究 总被引：2，自引：1，他引：2
360只1日龄天府肉鸭随机分为6组,分别喂以对照日粮（Cu 8 mg/kg）和高铜日粮（Cu 100 mg/kg,高铜Ⅰ组;Cu 200 mg/kg,高铜Ⅱ组;Cu 400 mg/kg,高铜Ⅲ组;Cu 600 mg/kg,高铜Ⅳ组;Cu 800 mg/kg,高铜Ⅴ组）6周,以流式细胞术研究高铜对雏鸭肾脏细胞周期和凋亡的影响。结果显示,肾脏细胞的调亡比例随日粮铜水平的升高而升高,当日粮铜水平达到400 mg/kg以上时,肾脏细胞凋亡比例与对照组比较差异极显著（P〈0.01）。日粮铜水平达到400 mg/kg以上时,肾脏细胞的增殖指数（PI）极显著低于对照组（P〈0.01）。结果表明日粮铜水平达到400 mg/kg以上时会引起肾脏受损,肾脏细胞的增殖分化严重受阻,肾脏细胞凋亡大量增加。 相似文献
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本文旨在研究高铜对雏鸭胸腺的病理学影响。选用1日龄天府肉鸭360只,随机分为6组,分别喂以对照日粮（Cu 8 mg/kg）和高铜日粮（Cu 100 mg/kg,高铜Ⅰ组;Cu 200 mg/kg,高铜Ⅱ组;Cu 400 mg/kg,高铜Ⅲ组;Cu600 mg/kg,高铜Ⅳ组;Cu 800 mg/kg,高铜Ⅴ组）6周。与对照组比较,高铜Ⅲ组、高铜Ⅳ组、高铜Ⅴ组雏鸭胸腺出现不同程度的病变,生长指数显著降低（P〈0.05或P〈0.01）,淋巴细胞的静止期增长及增殖指数明显下降（P〈0.05或P〈0.01）,淋巴细胞的调亡率显著升高（P〈0.05或P〈0.01）;高铜Ⅰ组和高铜Ⅱ组雏鸭胸腺上述指标变化不明显。结果表明,日粮铜含量高于400 mg/kg时,不同程度地抑制雏鸭胸腺的发育,导致雏鸭细胞免疫功能受损。 相似文献
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日粮中添加高水平铜对雏鸭血液指标的影响 总被引：1，自引：0，他引：1
试验对日粮中添加高水平铜对雏鸭血液指标的影响进行了研究。360只1日龄天府肉鸭随机分为6组，分别喂以对照日粮（Cu 8mg／kg）和高铜日粮（Cu100mg／kg，高铜Ⅰ组；Cu200mg／kg，高铜Ⅱ组；Cu400mg／kg，高铜Ⅲ组，Cu600 mg／kg，高铜Ⅳ组；Cu800mg／kg，高铜V组）6周。与对照组比较，高铜Ⅳ组和V组的红细胞数量、血红蛋白含量、血清铜蓝蛋白活性和血清铜锌SOD活性降低（P〈0．0）1），高铜Ⅲ组、Ⅳ组和V组血清丙氨酸氨基转移酶、天门冬氨酸氨基转移酶活性显著升高（P〈0．01），胆固醇、甘油三酯和总胆红素含量显著增加（P〈0．01）。结果表明．日粮铜水平为400mg／kg及以上时可引起上述血液指标的改变。 相似文献
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为探讨日粮铜添加水平对雏鸡肝脏及相关血液生化指标的影响,将420只1日龄艾维因肉鸡随机分为7组,分别喂以对照日粮（Cu 11mg／kg）和高铜日粮（Cu 100mg／kg,高铜Ⅰ组;Cu 200mg／kg,高铜Ⅱ组;Cu 300mg／kg,高铜Ⅲ组,Cu 400mg／kg,高铜Ⅳ组;Cu 500mg／kg,高铜V组;Cu 600mg／kg,高铜Ⅵ组）6N。高铜Ⅱ组、Ⅲ组、Ⅳ组、Ⅴ组、Ⅵ组雏鸡肝脏出现不同程度的病理损害,肝细胞颗粒变性和脂肪变性;透射电镜观察,肝细胞线粒体肿胀,嵴断裂甚至溶解消失。除高铜Ⅰ组和Ⅱ组外,其余高铜组肝脏铜含量均显著高于对照组（P〈0．01）。高铜Ⅴ组和Ⅵ组丙氨酸氨基转移酶、天门冬氨酸氨基转移酶活性显著升高（P〈0．05）。结果表明,日粮铜含量200～600mg／kg可引起肝脏病理损伤。 相似文献
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选用1日龄艾维茵肉鸡健雏420只,随机分为7组,分别饲以含铜11 mg/kg的基础日粮和含铜量分别为100（Ⅰ）、200（Ⅱ）、300（Ⅲ）、400（Ⅳ）、500（Ⅴ）、600 mg/kg（Ⅵ）的6种高铜日粮6周,探讨高铜对雏鸡某些血液生化指标的影响。结果显示：高铜Ⅰ组的血清铜蓝蛋白与铜锌SOD酶活性显著升高（P〈0.05或P〈0.01）;高铜Ⅵ组的红细胞数量、血红蛋白含量和血清铜蓝蛋白活性降低,与对照组比较差异显著（P〈0.05）;高铜Ⅳ、Ⅴ和Ⅵ组的血清天门冬氨酸氨基转移酶、丙氨酸氨基转移酶活性、血清尿素氮和肌酐含量,血清铜和肝铜含量显著升高（P〈0.05或P〈0.01）。 相似文献
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高铜对雏鸡肝细胞周期和凋亡影响的研究 总被引：5，自引：2，他引：5
420只1日龄艾维菌肉鸡随机分为7组，分别喂以对照日粮（Cu 11mg／kg）和高铜日粮（Cu 100mg／kg，高铜Ⅰ组；Cu 200mg／kg，高铜Ⅱ组；Cu 300mg／kg，高铜Ⅲ组；Cu 400mg／kg，高铜Ⅳ组；Cu 500mg／kg，高铜Ⅴ组；Cu 600mg／kg，高铜Ⅵ组）6周，以流式细胞术和原位末端标记法（TUNEL）研究了高铜对雏鸡肝细胞周期和凋亡的影响。结果表明，日粮铜水平达到300mg／kg以上时，肝细胞DNA直方图出现位于G1峰之前的亚G1峰（又叫AP峰），凋亡细胞比例与对照组比较差异显著（P〈0．05）。TUNEL法检测，肝脏组织切片中出现被染成黄褐色的凋亡细胞，且检出率随日粮铜水平的升高而升高。日粮铜水平达到400mg／kg以上时，肝细胞增殖分化受阻。 相似文献
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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
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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
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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
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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
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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