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1.
蛋氨酸锌是由蛋氨酸与无机锌在特定条件下发生配位形成的具有独特环状结构的金属螯合物,是一种类似动物体内吸收和发挥生物功能形式的新型有机微量元素添加剂。研究发现,与无机锌相比,蛋氨酸锌具有生物学效价高、毒副作用小、改善机体免疫力、增强抗应激能力等生物学功能,能显著提高家禽生产性能、改善蛋壳质量及减少家禽粪便中重金属排放量。本文对蛋氨酸锌的理化性质、吸收机制、生物学功能及其在家禽生产中的应用作一综述,以促进蛋氨酸锌在家禽生产领域的应用及其深入的研究。 相似文献
2.
锌是动物机体一种重要的无机微量元素,用蛋氨酸对其进行螯合可以有效地提高其生物学利用效率。本文简要介绍微波法合成蛋氨酸螯合锌及产品的分析鉴定方法。 相似文献
3.
锌是动物机体必需的微量元素之一，是多种金属酶和胰岛素的组成成分，参与机体内蛋白质、脂肪、碳水化合物、微量元素等营养物质的代谢，从而影响动物的繁殖、生长和免疫性能，因其在体内具有广泛的生理生化功能而被称为“生命元素”。那么作为第3代添加剂的蛋氨酸锌在畜禽生产中的应用究竟是怎么样的呢？下面做个简单的介绍。 相似文献
4.
蛋氨酸是一种必需氨基酸,在畜禽体内不能自行合成,而必须在饲料内供应。通常的饲料中蛋氨酸含量都不能满足动物生长发育的需要,因此它又是一种限量氨基酸。蛋氨酸是机体内合成蛋白质最重要的营养之一,供应量不足时可影响机体内蛋白质的合成作用,因而影响生长发育。蛋氨酸缺乏时也会使机体发生代谢失调。目前,蛋氨酸已能人工合成,迪高沙厂生产的蛋氨酸就是其中一种。 相似文献
5.
选用断奶小鼠72只作为研究对象,随机分为3组(对照组,硫酸锌组和蛋氨酸锌组),每组设4个重复。测定体重、组织锌含量及相关生理生化指标,以研究硫酸锌、蛋氨酸锌2种不同锌供给形式对机体的生长效应及抗氧化能力的影响。结果表明,硫酸锌组和蛋氨酸锌组均能不同程度地提高小鼠体重,蛋氨酸锌组小鼠体重显著高于对照组与硫酸锌组(P<0.05)。饲粮中添加硫酸锌可提高小鼠肝脏和血清中的锌含量(P>0.05);蛋氨酸锌组小鼠肝脏和血清锌含量高于对照组(P<0.05)及硫酸锌组(P>0.05)。2种锌源均显著提高碱性磷酸酶(AKP)、谷胱甘肽过氧化物酶(GSHPx)活性(P<0.05),不同锌源间无明显差异(P>0.05)。添加不同的锌源不同程度地提高总抗氧化能力(TAOC)、总SOD(TSOD)、铜锌超氧化物歧化酶(CuZnSOD)活性(P<0.05),蛋氨酸锌组TAOC、TSOD显著高于硫酸锌组(P<0.05)。添加锌显著降低NO含量(P<0.05),蛋氨酸锌效果显著强于硫酸锌(P<0.05);一氧化氮合酶(NOS)活性表现出与NO相反的趋势(P>0.05)。 相似文献
6.
【目的】 探究饲粮中添加两种不同有机锌源对新生犊牛生长性能及锌代谢的影响。【方法】 试验随机选取30头新生荷斯坦母犊牛（体重39.4 kg±0.8 kg）,随机分为3组,每组10头牛,对照组只饲喂牛乳,不添加有机锌;蛋白锌组和蛋氨酸锌组每头牛分别添加522.82 mg/d的蛋白锌和467.88 mg/d的蛋氨酸锌（均相当于80 mg Zn/d）。试验期14 d。在犊牛1日龄及14日龄晨饲前,测量每头犊牛体重,计算平均日增重。每天记录牛乳采食量,用于计算平均日采食量和料重比。每天晨饲前,由专人对犊牛粪便进行评分,计算犊牛腹泻率。在14日龄晨饲前,采集犊牛血清样品,用于测定血清中的钙、磷、锌、铜和铁浓度、碱性磷酸酶和超氧化物歧化酶活性、金属硫蛋白、丙二醛浓度以及总抗氧化能力。【结果】 与对照组相比,添加蛋氨酸锌显著提高了犊牛平均日增重（ P<0.05）,添加蛋白锌和蛋氨酸锌均降低犊牛腹泻率并提高血清锌浓度（ P<0.05）,且蛋氨酸锌组犊牛的血清锌浓度显著高于蛋白锌组（ P<0.05）。添加蛋氨酸锌显著降低犊牛血清铜浓度（ P<0.05）,而蛋白锌组犊牛的血清铜浓度与对照组之间无显著差异（ P>0.05）。添加有机锌源显著增加了犊牛血清中金属硫蛋白的浓度（ P<0.05）,但仅蛋氨酸锌提高了犊牛血清碱性磷酸酶活性（ P<0.05）;蛋氨酸锌能够显著提高犊牛血清中超氧化物歧化酶活性及总抗氧化能力（ P<0.05）,但是蛋白锌对其无显著影响（ P>0.05）;蛋白锌和蛋氨酸锌均可显著降低血清丙二醛浓度（ P<0.05）。【结论】 饲粮中添加蛋氨酸锌能够提高犊牛的生长性能,降低腹泻率,改善机体锌代谢水平,且其效果优于蛋白锌,因此建议在犊牛饲粮中以蛋氨酸锌形式添加80 mg Zn/d。 相似文献
7.
蛋氨酸锌是一种氨基酸螫合盐，吸收利用率较相应的无机盐高，能直接被靶组织利用。其中蛋氨酸是高产奶牛的限制性氨基酸之一，锌是机体受感染或发生炎症反应时许多急性反应蛋白和酶的辅助因子，对保持单核细胞的最适活性是必需的。最近的研究表明，乳头管上皮的完整性，是机体防御乳房感染的第一道物理屏障，锌对覆盖于乳头管表层的一层纤维蛋白（角蛋白）的形成是必需的。因而锌对乳房的健康很重要。本试验拟探讨蛋氨酸锌在奶牛预混料中的应用效果。１材料与方法１．１试验时间与地点试验于２００１年１月８日～３月１３日在北京南郊牛奶公… 相似文献
8.
锌在猪的生长和发育中起重要的作用 ,特别是在断奶仔猪上。通常在日粮中添加无机锌 (如氧化锌、硫酸锌等 ) ,但研究发现 ,无机锌在体内的利用效率较低 (李德发 ,1 996)。蛋氨酸内络合锌为新一代营养型饲料添加剂 ,能提高锌的生物利用率 ,并同时具有免疫增强作用 ,与各种营养物质、抗生素相容性极佳 ,具有协同作用 ,并能提高维生素存留率 (Ｗａｒｄ等 ,1 996;Ｈｉｌｌ 1 986)。因此 ,在断奶仔猪日粮中添加蛋氨酸内络合锌 ,对降低仔猪的死亡率和腹泻、提高生长速度和饲料转化效率都有明显的作用。1 材料与方法2 1 试验目的 研究蛋氨酸内络… 相似文献
9.
简要介绍金属螯合物蛋氨酸锌的性质及其作用机理 ,主要分析蛋氨酸锌作用效果产生差异的原因 ,分别从蛋氨酸锌本身、饲粮组成、评定指标、试验动物种类、动物生长阶段、蛋氨酸锌利用率的研究方法等几个方面进行说明 :简要阐述动物饲粮中添加蛋氨酸锌的必要性及其经济效益 相似文献
10.
4 氨基酸 4．1 蛋氨酸锌 蛋氨酸锌是蛋氨酸和锌的鳌合物,它具有抵 制瘤胃微生物降解的作用。与氧化锌相比,蛋氨 酸锌中的锌具有与其相似的吸收率,而且从尿中 的排出量更低,血浆锌的下降速度也更慢。 在奶牛日粮中添加蛋氨酸锌能够提高产奶 量,并降低奶中体细胞数。在生产条件下,蛋氨酸 锌还具有硬化蹄面和减少蹄病的作用。蛋氨酸锌 的添加量一般每头每天5-10g,或占日粮干物质 的0．03％-0．08％。 相似文献
11.
In late December 1985, 1485 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1985 and 44% of them responded. Veterinarians reported that 137,300 dogs were blood-tested to check for microfilariae and 1210 dogs were found with heartworm. Another 36 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number diagnosed in 1985 as 1247 (0.91%). Heartworm was reported from all provinces except Prince Edward Island, Newfoundland and Saskatchewan but most (1126) of the cases were in Ontario. Southwestern Ontario continued to be the primary focus of the infection in Canada. From Quebec, 91 cases were reported mostly from and around Montreal. From Manitoba, 19 cases were reported from Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 28% of the cases were observed with clinical signs of heartworm disease and 78% had a history of not having left Canada. 相似文献
12.
In late November 1988, 1581 small and mixed animal clinics and institutional veterinarians across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1988, and 46% of them responded. Veterinarians reported that 181,577 dogs were blood-tested for heartworm disease and 367 dogs were found with D. immitis microfilariae. Another 60 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number of cases diagnosed in 1988 as 441 (0.24%). 相似文献
13.
In late December 1984, 1853 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1984 and 35% of them responded. Veterinarians reported that 97,794 dogs were blood-tested to check for microfilariae and 1417 dogs (1.45% of those tested) were found with heartworm. Another 34 dogs were amicrofilaremic, but were diagnosed as having heartworm disease, to give the total number diagnosed in 1984 as 1451 (1.48%). Heartworm was reported from all provinces except Prince Edward Island and Newfoundland but most (1310) of the cases were in Ontario. In Quebec, 126 cases were reported mostly from west of Montreal. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 27% of the cases were observed with clinical signs of heartworm disease and 72% had a history of not having left Canada. Southwestern Ontario continued to be the primary focus of the infection. 相似文献
15.
In late November 1991, 1883 clinics in Canada were sent a questionnaire to assess the status of Dirofilaria immitis in dogs in 1991 and there was a 60.0% response. There were 344,031 dogs tested for heart-worm (HW), 627 were found infected and the prevalence of HW infection was 0.18%. There were 417 dogs with HW in Ontario, 116 in Manitoba, 38 in Quebec, 53 in British Columbia, three in Alberta, and one in Nova Scotia. In British Columbia, all of the infected dogs but one were from the Okanagan valley which, as from 1991, is a new focus of infection in Canada. Most dogs with HW had not been on preventive medication in 1990, and the prevalence among dogs tested and unprotected was 0.59%. That prevalence was considerably higher in endemic areas. Companion dogs, over three years of age and maintained primarily outdoors in rural areas, were most frequently infected. One cat was diagnosed with D. immitis and 33 dogs had Dipetalonema reconditium. 相似文献
16.
In late November 1989, 1732 clinics and institutional veterinarians were sent a questionnaire to assess the status of Dirofilaria immitis, and 51.7% responded. Of 247,716 dogs tested, 394 had D. immitis microfilariae and 51 were amicrofilaremic for a total of 445 cases and heartworm prevalence of 0.17%. Most (408) of these dogs had no preventive medication and the prevalence among dogs tested and unprotected was 1.01%. That prevalence was considerably higher in endemic areas. Thirty-seven dogs with heartworm had preventive medication. Heartworm was most frequent in companion dogs over three years of age maintained outdoors in rural areas. About 75% of the cases had never left Canada, 26% had clinical signs and 125 were not treated. Heartworm was reported from British Columbia, Manitoba, Ontario, Quebec, Nova Scotia and Newfoundland, but 383 cases were in Ontario. South-western Ontario was the primary focus of infection. There were 33 cases in Quebec and 24 in Manitoba, mainly found in and around Metropolitan Montreal and Winnipeg respectively. 相似文献
17.
In late November 1987, 1246 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1987, and 50% of them responded. Veterinarians reported that 165,428 dogs were blood tested for heartworm disease and 511 dogs were found with D. immitis microfilariae. Another 78 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number of cases diagnosed in 1987 as 589 (0.35%). 相似文献
18.
In late December 1986, 1224 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1986; 46% of them responded. Veterinarians reported that 150,989 dogs were blood-tested for microfilariae and 869 dogs were found with heartworm. Another 65 dogs were amicrofilaremic but diagnosed with heartworm disease and one was found with heartworm at necropsy to give the total number diagnosed in 1986 as 935 (0.62%). Heartworm was reported from Manitoba, New Brunswick, Ontario and Quebec, but most (810) of the cases were from Ontario. South-western Ontario continued to be the primary focus of the infection in Canada. There were 103 cases reported from Quebec, mostly from and around Montreal, and 21 cases from Manitoba, from Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 33% of the cases were observed with clinical signs of heartworm disease and 81% had a history of not having left Canada. 相似文献
20.
In late December 1983, 2 800 veterinarians across Canada were sent a questionnaire in order to assess the status of heartworm disease in Canada in 1983 and 26% of them responded. Veterinarians reported that 59 504 dogs were blood-tested to check for microfilariae and 771 dogs (1.30% of those tested) were found with Dirofilaria immitis. Heartworm disease was diagnosed in all provinces except New Brunswick and Newfoundland but most (733) of the cases were in Ontario. Heartworm disease was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 31% of the cases were observed with clinical signs of heartworm disease and 64% had a history of not having left Canada. Southwestern Ontario continues to be the focus of the infection and most of the dogs there had not left the province previously. 相似文献
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