连翘酯苷-羟丙基-β-环糊精包合物制备及其特性

针对连翘酯苷稳定性较差,限制了药物制剂制备及临床应用的问题,采用环糊精包合技术研制连翘酯苷注射剂,利用研磨法制备连翘酯苷-羟丙基-β-环糊精包合物.表征分析表明包合物光谱和熔点发生变化,对光稳定性和热加速实验稳定性明显增加.高效液相色谱分析鸡静脉注射给药血药浓度,表明连翘酯苷包合物与连翘酯苷药物动力学差异较小,血液中包合态药物能较快发生脱包合作用.     

兽医中药复方药物动力学研究方法及展望

本文概述了兽医中药复方药物代谢动力学的研究方法,对今后兽医中药复方药物代谢动力学的研究与发展进行了展望.     

中药药物代谢动力学研究进展

中药药物代谢动力学是在中医理论指导下,利用动力学原理与数学处理方法定量描述中药活性成分在机体内的吸收、分布、代谢及代谢过程(ADME),是一门新兴的介于数学与药理学之间的边缘学科.笔者从国内外中药药物代谢动力学发展概况及其研究的新理论、新方法进行阐述,这对中药给药方案、质量控制、新药的开发、剂型的改进等有重要的理论指导和临床实践意义.     

生长激素(PST)脂质体的药物代谢动力学研究

本文研究了生长激素(PST)脂质体在仔猪体内的药物代谢动力学,分析了血浆中生长激素浓度随时间的变化曲线,确定其释药模型为单室模型,求出了各项动力学参数,揭示PST脂质体的缓释效果显著,缓释时间长达7 d以上.     

生理模型在兽医药物动力学研究中的应用

文章介绍了生理药物动力学模型的基本概念和分类，描述了生理药物动力学模型建立过程，概述了兽医领域生理药物动力学的研究进展，展望了生理模型的发展趋势。生理模型在兽医药物动力学研究中必将发挥重要作用。     

我国兽医药物代谢动力学研究进展

本文主要从药代动力学、新的体内药物检测方法和技术应用方面简要的介绍了国内兽医药物代谢定力学研究的进展,并对未来我国兽医药物代谢动力学的发展方向进行展望和规划.     

兽医中药复方药物动物学研究方法及展望

本文概述了兽医中药复方药物代谢动力学的研究方法，对今后兽医中药复方药物代谢动力学的研究发展进行了展望。     

猪肌肉注射多拉菌素的药物动力学研究

对多拉菌素在猪体内的肌肉注射药物动力学进行了研究。长白×杜洛克杂交猪5头,临床健康,体重36kg~50kg。以300μg/kg体重剂量通过肌肉注射给药,血浆样品经乙腈处理后过18C富集柱,用甲醇提取多拉菌素并进行衍生化反应,以反向HPLC测定血清中的药物浓度,药物动力学参数用MCPKP程序进行处理。结果表明,猪肌肉注射多拉菌素后,血浆药物浓度可测至25d,药物浓度-时间曲线符合二室开放模型。主要药物动力学参数为,t1/2α0.056d±0.022d,t1/2β3.20d±1.34d,AUC223.51μg/(L.d)±65.20μg/(L.d),CMAX28.99μg/L±10.69μg/L,Tp1.24d±0.87d。结果显示,多拉菌素在猪体内具有吸收分布迅速、体内分布容积大、消除缓慢和生物利用度相对较高的特点,并表现为显著的长效性。研究结果对认识多拉菌素在猪体内的动力学特征和指导临床用药具有重要意义。     

头孢噻呋-大蒜素脂质体在大鼠体内的药代动力学

对头孢噻呋与大蒜素单一、配伍及其配伍后脂质体的药代动力学进行研究,采用高效液相色谱法测定给药后不同时间的血药浓度.用BAPP2.0药代动力学分析软件对所测得的结果进行分析,得出以下药代动力学结果:在大鼠体内均呈一室代谢模型.脂质体中药物的半衰期大于单一的药物半衰期,脂质体中药物的吸收速率常数Ka明显大于消除速率常数Ke(Ka头孢噻呋=6.29 h-1> Ke头孢噻呋=1.03 h-1;Ka大蒜素=1.12 h-1> Ke大蒜素=0.11 h-1),说明脂质体中药物的吸收迅速.吸收速率大于消除速率,可以使药物在体内迅速达到有效血药浓度以后维持较长的作用时间.结果表明,头孢噻呋-大蒜素脂质体肌肉注射缓释效果明显.     

中草药连翘提取物抑制金黄色葡萄球菌α-溶血素分泌活性研究

通过乙醇回流提取获得中草药连翘粗提物,利用MIC值测定、溶血活性测定、免疫印迹、RT-PCR、LDH及live/dead等试验方法研究连翘提取物对金黄色葡萄球菌α-溶血素分泌的影响.结果表明:连翘提取物对金黄色葡萄球菌的最小抑菌质量浓度(MIC)均大于2 048 mg/L,表明连翘提取物不影响金黄色葡萄球菌生长.连翘提取物在16～128 mg/L时,抑制了金黄色葡萄球菌α-溶血素的分泌,而且这种抑制作用呈剂量依赖性.研究结果提示连翘提取物可作为一种潜在的抗金黄色葡萄球菌感染药物,可进一步开发.     

中国饲料工业协会第五届理事会顾问、会长、常务副会长、副会长、秘书长、副秘书长、常务理事、理事名单

顾问刘中一张德邻宋瑞祥聂振邦张子仪戎易王维四会长白美清国务院原副秘书长、第四届理事会会长常务副会长(8人,以姓氏笔划为序)刘永好新希望集团董事长、第四届理事会副会长刘汉元通威股份有限公司董事长、第四届理事会副会长陈丹广东恒兴集团股份有限公司董事长、第四届理事会副会长张延喜农业部原副部长、第四届理事会副会长吴明夏湖南正虹科技发展股份有限公司董事长、第四届理事会副会长陶一山唐人神集团股份有限公司董事长、第四届理事会副会长温鹏程广东温氏食品集团有限公司董事长、第四届理事会副会长谭竹洲原化学工业部副部长、第…     

Evidence for the non-involvement of the uterus in the lifespan of the corpus luteum in the cyclic dog

Progesterone levels in peripheral blood of dogs were analysed during the cycle in which hysterectomy (n = 5) or sham surgery (n = 3) was performed as well as during the cycle of dogs (n = 5) hysterectomized at least one year prior to this study; the data were compared with the findings in control dogs (n = 3). The averages of the duration of the luteal period observed in the three experimental groups were not significantly different from those of control dogs. Immediately after surgery, the progesterone level decreased from 25 to 50% of the presurgical level, but returned to presurgical level in about four days. Prolactin levels were elevated for about 30 h after surgery. Nevertheless, the averages of the mean prolactin levels for each animal during the luteal period of the experimental groups were not significantly different from those of control dogs. It is concluded that in the dog, the uterus is not involved in the lifespan of the cyclic corpus luteum.     

The influence of the width of the saddle tree on the forces and the pressure distribution under the saddle

As there is no statistical evidence that saddle fit influences the load exerted on a horse's back, this study was performed to assess the hypothesis that the width of the tree significantly alters the pressure distribution on the back beneath the saddle. Nineteen sound horses were ridden at walk and trot on a treadmill with three saddles differing only in tree width. Kinetic data were recorded by a sensor mat. A minimum of 14 motion cycles were used in each trial. The saddles were classified into four groups depending on fit. For each horse, the saddle with the lowest overall force (LOF) was determined. Saddles were classified as "too-narrow" if they were one size (2 cm) narrower than the LOF saddle, and "too-wide" if they were one size (2 cm) wider than the LOF saddle. Saddles two sizes wider than LOF saddles were classified as "very-wide". In the group of narrow saddles, the pressure in the caudal third (walk 0.63 N/cm(2)+/-0.10; trot 1.08 N/cm(2)+/-0.26) was significantly higher compared to the LOF saddles (walk 0.50 N/cm(2)+/-0.09; trot 0.86 N/cm(2)+/-0.28). In the middle transversal third, the pressure of the wide saddles (walk 0.73 N/cm(2)+/-0.06; trot 1.52 N/cm(2)+/-0.19) and very-wide saddles (walk 0.77 N/cm(2)+/-0.06; trot 1.57 N/cm(2)+/-0.19) was significantly higher compared to LOF saddles (walk 0.65 N/cm(2)+/-0.10/ 0.63 N/cm(2)+/-0.11; trot 1.33 N/cm(2)+/-0.22/1.27 N/cm(2)+/-0.20). This study demonstrates that the load under poorly fitting saddles is distributed over a smaller area than under properly fitting saddles, leading to potentially harmful pressures peaks.     

浅谈对症用药

对症用药就是通过对患病信鸽的症状进行诊断,进而确定病属,选择药物及如何用药的方法。     

军犬鉴别中的嗅源培养和易出现的问题及对策

嗅源是军犬嗅觉作业训练的依据.军犬鉴别中嗅源能力的培养在整个鉴别训练中占有重要地位,关系到鉴别训练的成败和鉴别能力的提高.所以,军犬在嗅认嗅源时必须按照训犬员的指令充分、细致地感受嗅源气味,并且对嗅源气味产生兴奋反应.如何培养军犬充分嗅认嗅源以及及时解决嗅认过程中出现的问题,成为我们进行鉴别训练的关键.……