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饲用微胶囊鱼油粉末添加剂中试研究 总被引:6,自引:0,他引:6
1 鱼油对动物的生理功能 鱼油富含ω-3脂肪酸,其中二十碳五烯酸(EPA)和二十二碳六烯酸(DHA)是鱼油的特征脂肪酸。鱼油可用于添加在饲料和食品中,成为动物和人类ω-3脂肪酸的营养供给源。鱼油用来饲养动物后,其中的EPA和DHA会沉积于肉中和储存于脂肪组织中,这些ω-3脂肪酸提高动物免疫功能与防止疾病的能力。近年来,国外许多学者进行了鱼油喂养动物实验、EPA、DHA在动物体内的营养成分的转化机理,评价鱼油对动物免疫功能和日推荐量等研究。 各种实验结果表明:鱼油可在畜禽体内产生富集,改变其脂肪酸组成。添加… 相似文献
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微胶囊维生素饲料添加剂产品及其应用 总被引:2,自引:0,他引:2
简要介绍影响饲料维生素稳定性的主要因素 ,微胶囊技术以及几种常用的微胶囊化方法 ,微胶囊维生素添加剂产品的特点及其在饲料中的应用。 相似文献
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李青 《兽药与饲料添加剂》2002,7(6):21-22
维生素D3的含量测定有内标法和外标法两种,1995年版《中华人民共和国药典》规定维生素D3的含量是用内标法测定的。该法所用试剂纯度要求严格,内部标准必须加到每个样品中,色谱体系易受干扰,操作过程复杂。外标法测定维生素D3,既容易使色谱体系快速达到平衡,又可使操作步骤简化。内标法与外标法比较,内标法比外标法测定结果更准确,但外标法比内标法操作更简便、快速,容易使用。 相似文献
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VK3的分析一直因扰着饲料领域,由于分析方法的不同,在实际应用中产生很多不便和争议,本文系作者在工作实践中的一些实际体会,提供给大家供参考。 相似文献
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蛋鸡饲粮中维生素D3与碳酸氢钠水平组合对蛋壳质量的影响 总被引:1,自引:0,他引:1
运用两因素五水平二次正交组合设计,以饲粮中维生素D3和NaHCO3水平为决策变量,以蛋壳厚度,蛋壳相对重和破软蛋率为目标函数,建立二次回归数学模型,并采用频数分析法进行综合解析。结果表明,饲粮维生素D3与NaHCO3水平对蛋壳厚度有显著互作效应。 相似文献
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Plasma and milk concentrations of vitamin D3 and 25-hydroxy vitamin D3 following intravenous injection of vitamin D3 or 25-hydroxy vitamin D3. 下载免费PDF全文
Plasma levels of vitamin D3 or 25-hydroxyvitamin D3 in ewes after administration of a single massive intravenous dose of vitamin D3 (2 X 10(6) IU) or 25-hydroxy vitamin D3 (5 mg) were determined at zero, one, two, three, five, ten and 20 days postinjection. In six ewes injected with vitamin D3 conversion of vitamin D3 to 25-hydroxy vitamin D3 resulted in a six-fold increase in the plasma 25-hydroxy vitamin D3 level within one day. Elevated levels were maintained until day 10 but by day 20 a substantial decline in the plasma 25-hydroxy vitamin D3 level had occurred. Peak levels of vitamin D3 were reached one day after injection and then continuously declined until day 20. Administration of 25-hydroxy vitamin D3 increased plasma concentrations of 25-hydroxy vitamin D3 to fivefold higher levels than those observed when vitamin D3 was injected, with approximately threefold higher levels of 25-hydroxy vitamin D3 maintained for five days. On day 10 and day 20 ewes which were injected with 25-hydroxy vitamin D3 still maintained plasma levels of 25-hydroxy vitamin D3 which were twice as high as those of ewes injected with vitamin D3. In six ewes injected with vitamin D3, a sharp increase in vitamin D3 level in milk occurred within one day and more than a tenfold elevation of milk vitamin D3 concentrations were maintained for ten days. By 20 days the milk vitamin D3 level had returned to preinjection levels. These observations suggest that indirect supplementation of the suckling ruminant with vitamin D3 may be achieved through maternal injection and subsequent mammary transfer. 相似文献
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M Sturén 《Acta veterinaria Scandinavica》1985,26(2):179-190
The effect of intramuscular administration of vitamin D3 (1×106 IU D3/100 kg bodyweight) to 3 different dairy breeds on the serum levels of vitamin D3, 25-OH-D2, 25-OH-D3, Ca, inorganic P and Mg was studied.The vitamin metabolites and the electrolytes were analysed on 9 occasions during a 36-day period. Vitamin D3 was analysed on 6 occasions during the same period. No significant breed differences were observed except for 25-OH-D3 (P ≤ 0.05). The D3 level rose in 1 day from < 2 ng/ml to 906 ng/ml and decreased to below 50 % of the peak level after 6 days. At the end of the experiment (day 36) vitamin D3 was < 2 ng/ml. 25-OH-D3 rose from < 2 ng/ml to 106 ng/ml in 6 days and stayed at this level during the whole experiment. 25-OH-D2 decreased from 16 ng/ml to 5 ng/ml during the observation period. 相似文献
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本文旨在建立一种能同时准确测定饲料中维生素A和维生素E含量的方法,试验将样品在碱性条件下65℃水浴超声皂化提取,冰乙酸调pH至中性,乙醇稀释后直接用高效液相色谱法(HPLC)进行测定。结果表明:维生素A在0.036~108IU/mL线性关系良好,相关系数为1.00000,检出限1000IU/kg,方法回收率为95.8%~98.8%,RSD为0.8%~4.4%(n=5);维生素E在0.6~125μg/mL线性关系良好,相关系数为0.99998,检出限15mg/kg,方法回收率为95.3%~102.2%,RSD为0.8%~4.2%(n=5)。本方法快速简便,适用于配合料、浓缩料、维生素预混料和复合预混料中同时准确测定维生素A和维生素E的含量,相对于国标法节省了大量的时间和试剂,可应用于日常大批量饲料检测中。 相似文献
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影响饲料安全的因素有很多,其中,日粮矿物元素与维生素的超量使用是引起饲料安全问题的重要原因之一。因此,如何控制日粮中矿物质与维生素的超量添加,提高饲料质量,改善动物的健康与生存环境,减少对环境的污染,保障人类的安全性已引起了研究工作者的广泛重视。文章主要针对日粮矿物质和维生素过量与饲料安全的关系及其控制对策进行了综述。 相似文献