共查询到20条相似文献,搜索用时 93 毫秒
1.
维生素A是影响动物组织脂类代谢的关键因子。本文综述了维生素A对动物脂类代谢的影响,并从脂类代谢相关基因的表达及其信号通路、脂肪细胞的数量、脂肪细胞因子分泌和参与表观遗传学修饰的角度综述了其可能的影响机制,为深入探讨维生素A对动物脂类代谢的影响机制及通过维生素A调控动物的脂肪代谢提供了理论依据。 相似文献
2.
3.
4.
5.
6.
7.
8.
共轭亚油酸(CLA)是一类重要的营养物质,具有多种生物学功能。大量研究表明,动物饲粮中添加共轭亚油酸可改善饲料利用率,提高动物产品品质,并可调节动物的免疫机能。本文综述了近年来CLA在分子水平作用机制的研究进展,主要阐述了CLA对动物脂类代谢有关基因表达的调节作用及相关转录因子、信号传导和细胞凋亡的影响,并探讨了未来CLA在动物营养学上的研究和发展方向。 相似文献
9.
10.
11.
12.
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
13.
以5个金柑属品种、枳壳、软枝酸橘及广西土柠檬实生苗为材料,进行复水成活率、旱害指数、叶片相对含水量、超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)、丙二醛(MDA)、脯氨酸等生理指标及隶属函数的综合分析,为柑橘抗性砧木品种选育提供参考。结果表明:胁迫20d复水后的成活率融安滑皮金柑和长寿金柑最高,为100%,软枝酸橘最低,为88.9%;随着干旱胁迫加剧,各品种的旱害指数呈上升趋势,长寿金柑的旱害指数最低,为0.25,软枝酸橘的旱害指数最高,为0.61;从叶片相对含水量的结果来看,长寿金柑的变化幅度最小,软枝酸橘的变化幅度最大,在第18d时分别为61.19%和37.85%;3种保护酶之间相互协同作用减轻植株受害程度,其活性变化幅度与丙二醛和脯氨酸的含量变化相似。利用隶属函数法综合分析,得出各品种的抗旱性强弱依次为长寿金柑>枳壳>融安滑皮金柑>融安金柑>山金柑>广西土柠檬>金枣>软枝酸橘。 相似文献
14.
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
15.
本试验旨在研究两种绿头鸭(白羽绿头鸭和绿头鸭)肌肉营养组成和价值,为绿头鸭肉产品的开发利用提供基础数据和理论依据。选择白羽绿头鸭和绿头鸭60只(每个品种各30只,公母各半),依照国家标准测定胸肌粗蛋白质、粗脂肪、胆固醇含量及氨基酸、脂肪酸、微量元素和维生素的组成和含量,并对胸肌进行氨基酸评价及脂肪酸营养价值评价。结果显示,白羽绿头鸭肌肉粗蛋白质含量显著低于绿头鸭(P<0.05);两种绿头鸭肌肉中均检测到17种含量大于0.01%的氨基酸,其中白羽绿头鸭肌肉苏氨酸、组氨酸、丝氨酸和脯氨酸含量显著高于绿头鸭(P<0.05),赖氨酸、谷氨酸和精氨酸含量显著低于绿头鸭(P<0.05);检测到13种含量均大于0.01%的脂肪酸,其中白羽绿头鸭硬脂酸和油酸含量显著低于绿头鸭(P<0.05);检测到9种矿物质元素(钠、镁、钾、钙、锰、铁、铜、锌和硒),两种绿头鸭差异不显著(P>0.05);检测到8种维生素,白羽绿头鸭肌肉维生素B1含量显著高于绿头鸭(P<0.05),维生素D和维生素E含量显著低于绿头鸭(P<0.05)。两种绿头鸭肌肉氨基酸比例接近世卫组织推荐的理想模式,富含人体所需的矿物质元素和维生素,具有广阔的开发利用前景。 相似文献
16.
[目的]为了筛选适应临泽县种植的高产优质苜蓿品种。[方法]选择阿迪娜、金皇后、阿尔冈金和甘农3号4个苜蓿品种在统一管理的情况下对生产性能、营养指标进行比对试验。[结果]结果表明,在相同条件下,粗蛋白平均含量最高是阿迪娜,含量达19.25%,其次是金皇后、甘农3号、阿尔冈金,含量依次为19.15%、19.05%、19.05%;酸性洗涤纤维含量最低的是金皇后,31.75%,其次是阿尔冈金、阿迪娜和甘农3号,含量依次为32.75%、33.15%、33.75%;中性洗涤纤维含量最低的是金皇后,41.9%,其次是阿迪娜、甘农3号、阿尔冈金,含量依次为41.9%、42.2%、43.05%。第二年干草产量最高是阿迪娜,达14 706 kg/hm^2,其次是金皇后、甘农3号、阿尔冈金,分别达到14 402 kg/hm^2,14 231 kg/hm^2、13 804 kg/hm^2。[结论]根据综合生产性能表现,阿迪娜是比较适应我县种植的高产优质苜蓿品种。 相似文献
17.
Debra M. Powell MS PhD Karen Bennett-Wimbush MS PhD Amy Peeples AAS BS Maria Duthie BS 《Journal of Equine Veterinary Science》2008,28(1):28-33
To answer the question of whether horse height, cannon bone circumference, and loin width can be used as indicators of weight-carrying ability in light horses, eight mature horses underwent a submaximal mounted standard exercise test under four conditions: carrying 15, 20, 25, or 30% of their body weight. Heart rate was monitored, plasma lactate concentration was determined in jugular blood samples pre-exercise, immediately post-exercise, and 10 minutes post-exercise, with serum creatine kinase activity determined at the same times as plasma lactate concentrations, with additional samples collected at 24 hours and 48 hours post-exercise. Muscle soreness and muscle tightness scores were determined using a subjective scoring system 24 hours before and 24 hours after exercise. Heart rates remained significantly higher when the horses carried 25 and 30% of their body weight. Plasma lactate concentrations immediately and 10 minutes after exercise differed when horses carried 30% of their body weight compared with 15, 20, and 25% weight carriage. Horses tended to have a greater change in muscle soreness and muscle tightness when carrying 25% of their body weight, and a significant change in soreness and tightness scores was found in horses carrying 30% of their body weight. Loin width and cannon bone circumference were found to be negatively correlated to the changes in muscle soreness and tightness scores. In conclusion, the data suggest that horses with wider loin and thicker cannon bone circumference became less sore when carrying heavier weight loads. 相似文献
18.
Marioni-Henry K Vite CH Newton AL Van Winkle TJ 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2004,18(6):851-858
A retrospective review of records of 205 cats with histologically confirmed disease of the spinal cord was performed to identify the prevalence of disease in this nonrandomly selected population of cats. Clinical records were reviewed, and age, duration of neurologic illness, and clinical and histopathologic findings in cats with spinal cord disease were abstracted. Disease processes were classified into 7 categories and 23 groups. The most common diseases affecting the spinal cord of cats were feline infectious peritonitis (FIP), lymphosarcoma (LSA), and neoplasia of the vertebral column secondarily affecting the spinal cord. Information on age, onset and duration of clinical signs, and lesion localization at the postmortem examination in cats belonging to the 7 categories of disease were analyzed to create a practical list of differential diagnoses. Cats were also subcategorized into 3 groups based on their age at death. FIP was the most common disease of cats younger than 2 years of age. LSA and vertebral column neoplasia were the most common diseases affecting cats between 2 and 8 years of age. Vertebral column neoplasia was the most common disease affecting cats older than 8 years of age. Results of this histopathologic study showed that FIP and LSA were the most common disease processes affecting the spinal cord of cats. However, at least 21 other groups of diseases and their relative prevalence were identified. 相似文献
19.
This experiment was aimed to study the nutritional content and value of the muscles of two mallards (White feather mallard and mallard),and provide basic data and theoretical basis for the development and utilization of mallard meat products.60 White feathered mallards and mallards (30 for each breed,half of male and female) were chosen,and the composition and content of pectoral muscle crude protein,crude fat,cholesterol,amino acids,fatty acids,trace elements and vitamins were determined according to national standards and the nutritional values of muscle were evaluated.The results showed that the content of crude protein in muscle of White feather mallard was significantly lower than that of mallard (P<0.05).17 kinds of amino acids with contents higher than 0.01% were detected in the muscles of the two kinds of mallards,among which the contents of threonine,histidine,serine and proline in the muscles of the White feather mallard were significantly higher than those of mallard (P<0.05).The contents of lysine,glutamate and arginine were significantly lower than those of mallard (P<0.05).13 kinds of fatty acids with contents higher than 0.01% were detected,and the contents of stearic acid and oleic acid were significantly lower than those of the mallard.9 mineral elements (sodium,magnesium,potassium,calcium,manganese,iron,copper,zinc and selenium) in two kinds of mallards were detected,and there was no significant difference between the two kinds of mallards (P>0.05).8 kinds of vitamins were detected,and the content of vitamin B1 in muscle of White feather mallard was significantly higher than that of mallard (P<0.05),but the contents of vitamin D and vitamin E were significantly lower than that of mallard (P<0.05).The ratio of amino acids in muscle of two kinds of mallards was close to the ideal model recommended by WHO,which was rich in mineral elements and vitamins for human body,and had a broad prospect of development and utilization. 相似文献
20.
分别用CIDR(孕酮阴道栓)+PMSG(处理1)和CIDR+PMSG+LH(处理2)两种处理方法对山羊进行同期发情处理。结果发现,两种处理均以撤栓后第1d发情率最高。撒栓后0-24h和24h-48h的发情率,处理1和处理2(61.4%,13.6%和48%,20%)之间差异不显著;撤栓后48h-72h的发情率,处理1(4.59,6)显著低于处理2(24%)(P〈0.05);撤栓后0~72h发情率,两种处理(79.5%,92%)无显著差异(P〉0.05)。从手术时对卵巢的观察可以看出,有大卵泡或排卵的发情羊,处理1为91.2%,处理2为100%,二者无显著差异;排卵的发情羊,处理1为(58.8%)显著低于处理2为(91.2%)(P〈0.05)。 相似文献