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为探索胃肠弛缓与交感神经机能状态的关系,观察了腰交感神经干阻断对健康羊和实验性胃肠弛缓羊胃肠运动机能的影响,并比较了碳酸盐缓冲合剂或醋酸盐缓冲合剂配合腰交感神经干阻断对酸过多性或碱过多性胃肠弛缓羊胃肠内环境参数、电活动性及植物神经调控指标的影响。结果表明,腰交感神经干阻断对健康羊胃肠电活动性影响不大;单纯腰交感神经干阻断对实验性胃肠弛缓无明显治疗效应;碳酸盐缓冲合剂或醋酸盐缓冲合剂配合腰交感神经干阻断对实验性胃肠弛缓的恢复亦无促进或辅助作用。由此认为,在起因于胃肠内环境特别是酸碱度改变的胃肠弛缓,交感神经兴奋性过高可能不是主要的致病因素。 相似文献
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动物营养中的必需微量元素氟 总被引:1,自引:0,他引:1
长期以来,氟被认为是有害元素。随着对氟在动物体内生理功能和生物学效应研究的进展,现在氟已被确认为动物必需的微量元素,在动物机体内起着不可取代的作用。本文对氟的代谢、生物学功能及其应用和需要量等作一综述。1氟在人和动物体内的分布、含量及动物机体的耐受量。氟在人体中的平均含量为30─70mg/kg,一个成年人体中大约含2.6克,仅次于铁。氟在机体的各个组织都有分布,但相对集中于硬组织,如骨胳和牙齿中,约占90%。动物的皮、毛、鳞、喙中含量也较高,海洋生物的含氟量要比陆生生物的含氟量高。动物机体对氟有一定的耐受量,… 相似文献
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近年来,动物疫病防控备受关注,讨论热度一直不减.其中动物疫病检测占据主导,是疫病防控基本措施,不容忽视.实践证明,动物疫病检测技术渗透领域广泛,具有多样性,应用价值非常高.在众多检测技术中,实验室检测技术是最具权威的,通过实验室完成多种动物产品检测及相关产品检查,所得到的检测结果,将会被应用到动物疫病防控中,起到重要引... 相似文献
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为了提高蛋白质类饲料的利用价值,开辟新饲源,我们进行了高蛋白复合氨基酸饲料添加剂─PAV的研制。经过对多种物质的对比筛选后,我们选用了动物血做为基物进行发酵。因为畜血中除富含蛋白质等营养物质外,还含有有机铁,作为动物饲料,其中所含氨基酸比例及其它碳素骨架分子同动物机体结构所需极相近似,易於再利用。但畜血中的高分子血纤蛋白和红细胞很难被动物分泌的酶分解,实际利用价值不高。用微生物发酵的方法,可以将其中难以消化的高分子物质降解成小分子态物质而利于动物的消化和吸收。在研制过程中,我们发现发酵工艺不同,… 相似文献
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Schumacher J Steiger R Schumacher J de Graves F Schramme M Smith R Coker M 《Veterinary surgery : VS》2000,29(1):54-58
OBJECTIVE: To determine if pain of the dorsal margin of the sole in horses can be attenuated by anesthesia of either the distal interphalangeal (DIP) joint or the palmar digital (PD) nerves. STUDY DESIGN: A unilateral forelimb lameness was induced by creating solar pain. Response to administration of local anesthetic or saline solution into the DIP joint and to administration of local anesthetic around the PD nerves was evaluated. Animals: Six horses. METHODS: Lameness was induced by creating pressure on the dorsal margin of the sole by screwing set-screws into a nut welded to the inside of each branch of a shoe. Gaits were evaluated before and after application of set-screws and after a local anesthetic or saline solution was administered into the DIP joint and, in a second trial, after a local anesthetic was injected around the PD nerves. Gaits recorded on videotape were evaluated, and lameness scores were assigned to each gait. RESULTS: Lameness scores were high after application of set-screws and remained high after saline solution was administered into the DIP joint. Scores decreased significantly (P < or = .05) after a local anesthetic was administered into the DIP joint or around the PD nerves. CONCLUSIONS: Analgesia of the DIP joint or the PD nerves desensitizes at least a portion of the sole. CLINICAL RELEVANCE: Pain arising from the sole should not be excluded as a cause of lameness when lameness is attenuated by analgesia of the DIP joint or PD nerves. 相似文献
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实验以颈静脉分别注射乙酸、丙酸、丁酸的钠盐溶液模拟反刍动物采食后血液中挥发性脂肪酸(VFA,下同)升高的状况;以瘤胃平滑肌电为瘤胃消化运动的指标,研究了绵羊血液中VFA对瘤胃消化运动的影响。结果表明:0.2M的乙酸钠50ml,丙酸钠5ml或丁酸钠2.5ml可增强瘤胃运动的频率和强度:而1M的乙酸钠50ml、丙酸钠5ml或丁酸钠2.5ml对瘤胃运动的频率和强度有抑制作用。三种VFA钠盐的作用强弱顺序是:丁酸钠>丙酸钠>乙酸钠。 相似文献
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The tone of respiratory smooth muscle is largely determined by the input from autonomic nerves. The distribution of adrenergic and selected nonadrenergic, non-cholinergic (NANC) nerves in the normal equine trachealis muscle was investigated using immunohistochemistry. The smooth muscle of the trachealis was found to contain numerous nerves immunoreactive for an enzymatic marker of adrenergic nerves, as well as many nerves immunoreactive for a putative NANC neurotransmitter, peptide histidine isoleucine, a potent bronchodilator. The tissues surrounding the respiratory smooth muscle contained numerous nerves immunoreactive for the neuropeptides substance P and calcitonin gene-related peptide, which can cause marked vasodilation and bronchoconstriction. The complex innervation of the equine trachea should be kept in mind when interpreting the results of physiological experiments. 相似文献
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为探讨不同养分对草地早熟禾生长的作用机理,以氮、磷、生物菌肥和柠檬酸各2个水平,共8个处理进行了田间试验,测定了草地早熟禾体内可溶性活性物质的含量变化及生物量。结果表明,在氮、磷施用水平较低的情况下,配合施用一定量的柠檬酸和生物菌肥,能提高草地早熟禾地上生物量、过氧化氢酶活性、可溶性糖和可溶性蛋白含量,最高分别达到了0.655kg/m2、5.33μmol/(min·g)FW、6.12%和0.756mg/g,与所有高氮、磷水平处理的效果接近或相当;可溶性糖,可溶性蛋白含量和过氧化酶活性均随着施肥后时间的持续而不断升高,在进入25d后,含量趋于稳定,保持在一个相对平稳的含量范围。 相似文献
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JIT生产方式作为企业提高市场竞争力的有力手段正在被越来越广泛地认识、研究和应用,而目前JIT生产方式的应用主要是针对制造业。文中主要分析了起源于制造业的JIT生产方式被应用于中餐企业是如何提高其服务质量和管理水平,首先对JIT生产方式在中餐企业的适用性进行分析,然后将其生产流程的三个环节拆解,分别指出其中存在的问题,利用JIT的相关理论来依次解决其发展中的问题,最后提出中餐企业在引入JIT时的建议。 相似文献
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A technique for ultrasonography of the brachial plexus and major nerves of the canine thoracic limb is described based on examination of five canine cadavers and three healthy dogs. The ventral branches of the spinal nerves that contribute to the brachial plexus are identifiable at their exit from the intervertebral foramina. These nerves may be followed distally, cranial to the first rib, until they form the brachial plexus. The musculocutaneous, ulnar, and median nerves are identified on the medial aspect of mid‐humerus and followed proximally to the axillary region and distally to the elbow. The radial nerve, formed by multiple nerve components, is seen on the mediocaudal aspect of the humerus. Nerves appear as hypoechoic tubular structures with an internal echotexture of discontinuous hyperechoic bands, surrounded by a thin rim of highly echogenic tissue. Improved understanding of the ultrasonographic anatomy of the brachial plexus and its main branches supports clinical use of this modality. 相似文献
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代谢产物是基因转录翻译为蛋白质后生命活动的最终执行者,因此,机体代谢产物的变化可以直接反映出生物体内各种生命活动的变化。运用代谢组学技术可以清晰并直观地对机体代谢物的变化进行检测。奶牛生产性疾病一直是畜牧兽医行业关注的重点疾病之一。奶牛出现生产性疾病会直接或间接导致奶牛生产性能下降,对养殖业造成危害。代谢组学技术的应用可以更加全面地了解疾病的发生发展过程,准确检测出参与疾病发生的物质和代谢通路,使兽医更加有针对性地开展疾病防控和治疗。综述了代谢组学技术在奶牛生产性疾病研究中的应用,以期为今后奶牛生产性疾病的防控和治疗提供思路。 相似文献
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羊蹄软包装食品生产工艺研究 总被引:2,自引:1,他引:1
通过正交试验探讨影响羊蹄软包装食品质量的关键生产工艺。结果表明:在15℃条件下,采用1.5%~2.0%的NaOH溶液浸泡48h脱毛后,用0.5%的柠檬酸中和12h,预煮1h,杀菌时间为45min,产品感官质量最好。 相似文献