共查询到20条相似文献，搜索用时 250 毫秒
1.
2.
精氨酸是一种条件性必需氨基酸,在生理调节方面具有重要的功能。在正常情况下,成年动物对精氨酸的需求可以通过内源性合成满足,但在应激条件下,内源合成的精氨酸不足以满足机体的需求。精氨酸代谢可合成一氧化氮(NO),NO在体内发挥着重要的生理作用。文中综述了高温热应激对母猪的影响、精氨酸在体内的代谢过程及在抗氧化应激方面的作用,以促进高温热应激条件下精氨酸在母猪中的应用及研究。 相似文献
3.
精氨酸为条件性必需氨基酸,在应激状态下和特殊生长阶段,它是必需氨基酸,体内合成的精氨酸不能满足生理代谢需要,但长期或者过量补充精氨酸对机体会造成损害。近年来,精氨酸在妊娠母猪日粮中的应用有诸多报道成为养猪生产的一个热点。本文评述了动物机体精氨酸的来源与代谢以及日粮精氨酸对妊娠母猪繁殖性能和仔猪生长性能的影响,以期对养猪生产有所指导。 相似文献
4.
综述精氨酸的生理、代谢和营养作用.精氨酸(Arg)是幼年动物的必需氨基酸,是动物体内一氧化氮和多胺合成的生物前体,并能刺激生长激素和胰岛素的释放.在动物体内起重要的营养生理作用. 相似文献
5.
精氨酸是动物机体代谢的重要氨基酸,是新生哺乳动物的必需氨基酸,正常情况下成年哺乳动物能够合成满足机体自身需要的精氨酸,但在受伤、肠道受损等应激状态或病态下合成精氨酸的量不能满足机体的需要量,所以精氨酸是成年哺乳动物的条件性氨基酸。由于家禽体内缺乏甲酰磷酸酶等关键酶,不能合成精氨酸,只能由日粮提供,所以精氨酸是家禽的必需氨基酸。精氨酸在动物营养代谢中发挥着重要的作用,同时在畜禽生产中也存在着广泛的应用。本文对精氨酸的主要生理作用及其在畜禽生产中的研究与应用进行综述。 相似文献
6.
氨基酸作为构成蛋白质的主要原料和基本单位在动物体内发挥作用,是生物体内不可缺少的营养成分。L-精氨酸是条件必需氨基酸,也是功能性氨基酸,在妊娠母猪生理、免疫、繁殖等方面均有重要影响。通过综述精氨酸的生物学作用、合成与代谢,改善宫内发育迟缓,以及对母猪繁殖性能和胎儿生长发育等方面的影响,为其在饲料中的合理应用提供参考。 相似文献
7.
精氨酸作为一种条件性必需氨基酸，不仅是合成蛋白质的重要原料，而且在生理调节方面具有重要的功能一本文就精氨酸在动物体内的转运、对机体的重要营养生理功能以及对动物肠道黏膜的完整性方面的研究作一综述 相似文献
8.
精氨酸作为一种条件性必需氨基酸,不仅是合成蛋白质的重要原料,而且在生理调节方面具有重要的功能.本文就精氨酸在动物体内的转运、对机体的重要营养生理功能以及对动物肠道黏膜的完整性方面的研究作一综述. 相似文献
9.
功能性氯基酸——精氦酸（Arg）具有重要的生理、代谢和营养作用,几乎机体中所有组织均利用Arg合成胞浆蛋白和核蛋白,精氨酸在促进肌肉蛋白质合成、增强机体的免疫力、细胞分裂、伤口复尿和激素分泌等各种生理过程中,也都有着重要的角色。Arg为条件性必需氨基酸,在应激状态下和特殊生长阶段,为必需氨基酸,仔猪体内合成的精氨酸不能满足生理代谢需要。但是精氨酸的吸收与赖氨酸等桔抗,因此,对精氨酸及其内源性合成调控研究具有极大的应用价值和实践意义。精氨酸生素（Arginineactivatoradditive,AAA）是N-乙酰谷氨酸（N-acetylglutamate,NAG）的类似物,作为一种新型的功能性氨基酸,可以有效调控内源性精氨酸合成,进而促进动物生长性能。本文就精氨酸和精氨酸生素特别是其对机体内源性精氨酸合成调控及其在仔猪和母猪中的研究进展与应用作一综述。 相似文献
10.
11.
12.
Beran GW 《Preventive veterinary medicine》2008,86(3-4):198-207
When early people made their appearance, zoonotic infectious diseases were already waiting, but epidemic diseases did not appear in human history until people began to live in large numbers under conditions of close contact, mainly during the last 10,000 years. Disease has decimated urban populations, conquered armies, and disrupted society. The focus here is on (1) the plague of Athens and the Black Death; (2) smallpox, influenza, and rabies; (3) avian influenza prion diseases, and foot & mouth disease; and (4) emerging and re-emerging diseases. All have veterinary public health associations. In Athens, Greece, in 430 BC, when the Spartans ravaged the countryside, hordes crowded into Athens so that orderly movements, space in which to live, and adequate supplies of food became impossible. Crowding of any population fosters disease transmission; chaos and disorder enhance it all the more. Out of northern Egypt came a terrible plague from across the Mediterranean Sea. The identity of the plague of Athens remains unsure, but the well-considered conclusion is Rift Valley Fever, a mosquito borne, viral zoonosis. The Black Death, also called the Plague, raged in Asia for centuries. In 1347, the Black Death was brought by a ship out of Asia to Sicily. The scenes of devastation were repeated throughout Europe, with 90% or more of the people dying in city after city. Influenza, too, has been a cause of periodic human epidemics, but the great pandemic of influenza occurred in the last months of World War I. In the years of highest occurrence, more than half the world's population became clinically infected. If veterinary public health had been born earlier, it could have led to elucidating the epidemiology of influenza and the plagues of Athens, Europe, and Asia. In turn, smallpox had also caused continual tragedy. In 1796, Edward Jenner began to harvest pustules of cowpox from children or infected cows and inject them into susceptible children. In 1980, the World Health Organization declared that smallpox had been eliminated from the world. Rabies, though, still strikes terror. A number of animal diseases, broadly termed emerging and re-emerging diseases, need surveillance because they have the potential to impact human health. From late in 2003 to 2007, the highly pathogenic H5N1 influenza virus in poultry infected at least 121 people and caused 62 deaths in four countries. The prion diseases, too, all have very high numbers in concentrated contacts. To control these diseases, veterinary public health is essential, with diagnosis, epidemiological surveillance, clinical manifestations, and prevention as primary measures. 相似文献
13.
14.
在动物的异常行为中以刻板行为最为常见,而咽气癖又是马最常见的口部刻板行为之一。作者就咽气癖在生理方面和心智方面对马体产生的影响、行为基础、诱因的研究进展及常见的防治措施进行综述。 相似文献
15.
16.
Dekker A Dercksen D Snoep J van Wuyjckhuise L 《Tijdschrift voor diergeneeskunde》2007,132(18):695-701
On 26th of july 2007 a new case of bluetongue was notified in the Netherlands and on 2nd of august 2007 foot-and-mouth disease was diagnosed in Surrey, England, which raised the threat of having both infections simultaniously in one area. Bluetongue and foot-and-mouth disease have a different pathogenesis, but symptoms may resemble each other at a later stage of infection. The pathogenesis and possible clinical symptoms of both infections are discussed and illustrated with pictures. 相似文献
17.
18.
19.
20.