共查询到19条相似文献，搜索用时 453 毫秒
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用包衣技术制备缓释制剂是制药行业的常用方法。缓释制剂一般都是通过对药物的渗出、扩散、渗透及离子交换等特性加以控制的。在不少情况下 ,主要是通过选择适宜的辅料 ,采用制剂技术 (如包被 )来达到延缓药物释放的目的。随着新型高分子包衣材料的不断涌现 ,采用包被技术来制备缓释包衣尿素越来越趋向合理 ,通过包被不同厚度或不同释药性能的衣料 ,可达到控制尿素氮释放速度的目的。1 包衣目的及对包衣产品的质量要求1 1 包衣目的掩盖尿素氨味 ,改善适口性。控制尿素氮释放速度 ,达到缓释目的 ,提高尿素氮的利用率和饲料效率 ,防止尿素… 相似文献
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用包衣技术制备缓释制剂是制药行业的常用方法,目的是对药物的渗出、扩散、渗透及离子交换等特性加以控制的。反刍家畜饲料中添加尿素,是利用其瘤胃的消化特点,提供生成菌体蛋白的氮源,从而既节约蛋白质饲料,又提高饲养效果。通过包被不同厚度或不同释药性能的衣料,可达到控制尿素氮释放速度的目的。1包衣目的及对包衣产品的质量要求1.1包衣目的掩盖尿素氨味,改善适口性。控制尿素氮释放速度达到缓释目的,提高尿素氮的利用率和饲料效率,防止尿素中毒,提高尿素使用的安全性。防潮、防湿,以增加尿素的稳定性。改善包衣尿素外观,便于识别不同用… 相似文献
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包衣尿素、络合尿素、糊化尿素三种尿素饲料添加剂由于加工方法和工艺的不同，其在缓释效果、适口性和安全性、奶牛产奶性能以及经济效益等方面的应用效果各不相同。在奶牛饲喂试验的基础上，对三种尿素饲料添加剂的使用效果加以比较，为尿素饲料添加剂在反刍家畜养殖业中的广泛使用提供参考。 相似文献
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细菌性疾病严重危害动物机体健康，影响畜牧养殖业经济利润。抗菌药物已诱导多种细菌产生耐药性，这在一定程度上降低了其治疗效果。然而，通过提高抗菌药物使用剂量以加强疗效不仅容易引起毒副作用，还易导致药物残留。因此，寻找新方案来提升传统抗菌药物的抗菌活性成为药物研究者工作重点。以传统抗菌药物作为客体分子，利用包合技术将其同价格低廉的环糊精等主体分子制成包合物，可改善药物理化性质及抗菌活性，显示出良好发展前景。包合物不仅能改善药物溶解性、稳定性，还兼具备缓释效果，可有效提高抗菌药物生物利用度。同时，其还能与细菌膜结合，协助抗菌药物穿越膜结构，最终提高药物抗菌效果并降低抗菌药物使用剂量。本文将从包合技术的发展历史、增强抗菌药物活性应用现状以及提高抗菌药物药效学机制三个方面进行总结，以期为兽药研究者提供有效的借鉴。 相似文献
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中兽药以其绿色天然、安全无污染、且兼有营养和药用双重作用而深受人们青睐。为在畜牧业中安全有效地使用中兽药,以达到既能降低畜禽饲养成本、提高畜禽养殖的经济效益和畜禽产品安全性又能降低养殖业对环境的污染以维持畜牧业可持续发展的目的。论文在论述中兽药具有毒性低、无残留、无毒副作用和不产生抗药性等作用特点的基础上,着重就中兽药在畜牧生产中,包括在预防和治疗畜禽疾病方面、在畜禽免疫调节和抗应激方面、在提高畜禽的生产性能方面、在改善畜产品品质等方面的应用及中兽药制剂的开发前景等进行了较为详尽地综述。 相似文献
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Riviere JE 《Veterinary journal (London, England : 1997)》2007,174(3):462-471
The purpose of this article is to make an educated guess as to what veterinary pharmacology will look like in two decades. By examining the past, it is evident that change is incremental unless a transforming discovery occurs. In the last few decades, such events have dramatically changed medicine and pharmacology, however they have not percolated through the system to the effect that novel drugs have replaced our traditional armamentarium. The effect of six transforming technologies (continued advances in computer technology, microfluidics, nanotechnology, high-throughput screening, control and targeted drug delivery, pharmacogenomics) on veterinary therapeutics is examined. These should lead toward more efficacious and safer drugs across most therapeutic classes due to both increases in our knowledge base as well as more efficient drug development. Shorter term improvements in drug delivery should be seen. Although this growth in technology would portend major advances over the next few decades, economic and regulatory constraints must still be overcome for these new drugs or therapeutic approaches to become common practice. 相似文献
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兽药缓控释制剂的研究进展 总被引：1，自引：0，他引：1
长效制剂由于其可以减少给药次数同时保证药效等一系列优点在兽药领域发展较快。综述了国内外兽药领域开发研制的多种缓控释制剂,包括缓释装置、新型的缓释剂型等。并对其制备、性能药物释放行为做了详尽的说明,并对兽药缓控释制剂未来的发展做了进一步的展望。 相似文献
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P.‐L. Toutain A. Bousquet‐Melou 《Journal of veterinary pharmacology and therapeutics》2013,36(5):420-424
In both human and veterinary medicine, it has been shown that flooding the market with different generics and/or ‘me‐too’ branded drugs has increased overall antibiotic consumption correlating with the emergence and spread of bacterial resistance to antibiotics. Another possible undesirable consequence of the promotion of generics is the promotion of an economic incentive that encourages the use of old drug products with very poor oral bioavailability, marketed with historical dosage regimens and extensively excreted in the environment. What veterinary medicine rather needs is new innovative and ‘ecofriendly’ antibiotics to actually enforce a more prudent use of antibiotics. For a pharmaceutical company, generics are inexpensive to manufacture and on a short‐term basis, the generic market is very appealing. However, on a long‐term basis, this marketing orientation provides a disincentive to the development of new and innovative products that will be required to meet the therapeutic needs of the veterinary community while being consistent with public health concerns. Indeed, for veterinary medicine, the key issue surrounding antibiotics is public health. It is the opinion of the authors that veterinary antibiotics and/or veterinary drug formulations should be innovative in terms of selectivity (no or minimal impact on the commensal gut flora), biodegradable (with minimal environmental disruption), and more expensive, with a strictly regulated market rather than unselective, cheap, and freely available drugs. 相似文献
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和中兽药非提取制剂（主要是散剂）相比,虽然中兽药提取制剂具有明显优点,但片面于讲究现代化制剂工艺和指标性质量标准,导致生产成本增高,失去了经济动物应用价值。针对经济动物临床应用特点,中兽药提取制剂应遵循中兽医药客观特点及发展规律,既要满足药剂学要求,又要保持中兽医药特色,即要充分利用现代先进制剂技术,还有保持制剂成本符合经济规律。 相似文献
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As an excellent pharmaceutical carrier,liposomes exhibit characteristics of wide drug loading range,high efficiency and low toxicity.Besides increasing stability and solubility of loading drugs,liposomes can ascribe targeting and sustained release features to loading drugs.Meanwhile,it can improve bioavailability of loading drugs.Based on the above characteristics,liposomes is becoming hot spot of research and application.This article reviewed construction methods of liposomes based on structure,particle design and chosen of preparation method.Combined with application and demands of veterinary medicine,research progress on application of liposome in the field of veterinary medicine was submitted.It is expected that this article will provide reference for the development of new drug delivery systems used in the field of veterinary medicine. 相似文献
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农药、兽药、重金属、生物毒素等残留物质的痕量检测在医学诊断、食品安全、环境监测等领域均具有重要意义，其中基于抗原-抗体特异性识别的免疫分析技术具有特异性强、灵敏度高、稳定性好、操作简便快捷等优点，但如何获得小分子化合物的特异性抗体是研制免疫分析技术的关键。作者介绍了基于杂交瘤技术制备小分子化合物单克隆抗体的方法，分析了影响杂交瘤技术制备小分子化合物单克隆抗体的因素，然后综述了小分子化合物单克隆抗体在兽药残留、药物开发、环境保护等动物医学领域的应用，最后展望了小分子化合物单克隆抗体生产和应用的发展趋势，为小分子化合物单克隆抗体的制备与应用相关研究提供指导。 相似文献