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1.
药物共晶是药物活性成分和共晶形成物以氢键或其他非共价键结合形成的晶体,近年来有关药物共晶的研究已成为药物研发的新热点。本文从专利申请状况、专利申请人、专利申请的法律状态、专利申请的技术等角度进行分析,为药物共晶研究提供研究方向。  相似文献   

2.
药物共晶筛选技术的研究进展   总被引:1,自引:0,他引:1  
近年来,药物共晶筛选技术成为改善药物溶解度、稳定性等性质的研究热点。该技术不改变药物分子结构,只是通过分子间作用力改变药物的理化性质,为难溶性药物的研发提供了新途径。共晶是具有新特性的药物组合,可获得知识产权。本文综述了药物共晶筛选技术,为药物共晶的深入研发提供参考。  相似文献   

3.
抗生素及草酊磷对盐藻生长的影响   总被引:5,自引:0,他引:5  
目的:研究常用抗生素和草酊磷(Phosphinothricin,PPT)对盐藻生长的影响。方法:在固体培养基中加入不同浓度的卡那霉素、青霉素、链霉素、壮观霉素、利福平和PPT,在液体培养基中加入不同浓度PPT,对盐藻进行选择培养,观察盐藻在选择试剂作用下的生长情况。结果:卡那霉素、青霉素、链霉素、壮观霉素1600mg/L时尚不影响固体培养基中盐藻的生长;利福平400mg/L时可完全抑制固体培养基中盐藻的生长;而PPT3mg/L时即可完全抑制固体和液体培养基中盐藻的生长,5mg/L时可以杀死液体培养基中的盐藻。结论:PPT对盐藻的生长具有很强的抑制作用,在基因工程中,以抗除草剂(BAR)基因作为盐藻的选择标记基因研究盐藻的转化是合适的,草酊磷可以作为有效的选择试剂。  相似文献   

4.
目的:将壳聚寡糖应用于黄芩苷的制备,以提高药物的体外溶出度。方法以壳聚寡糖为载体,采用喷雾干燥法制备黄芩苷固体分散体,对药物与载体不同比例制备的固体分散体的溶出行为进行了比较研究,并进行物相分析。结果黄芩苷和壳聚寡糖按1:6比例制备的固体分散体在30 min时药物的体外累积溶出度为94.25%;经差示扫描量热法(DSC)、扫描电镜法(SEM)和X-射线粉末衍射法(XRD)等分析,固体分散体中黄芩苷以非晶形态高度分散;傅里叶红外光谱扫描( IR)结果表明壳聚寡糖与黄芩苷之间存在相互作用。结论以壳聚寡糖为载体制备的固体分散体能显著改善黄芩苷的溶出度;壳聚寡糖作为一种新型固体分散体载体具有实际应用价值。  相似文献   

5.
利用和厚朴酚熔点低的特点,以亲水性惰性交联羧甲基纤维素钠为载体材料,采用熔融法制备新型和厚朴酚表面固体分散体,对其溶出行为和稳定性进行初步的考察,并通过差示扫描量热法、X射线粉末衍射法、扫描电镜法等探究药物在载体中物相特征。结果表明,当和厚朴酚与交联羧甲基纤维素钠质量比为1∶2时,和厚朴酚表面固体分散体15 min溶出度大于90%,且药物平均溶出时间大幅缩短;在表面固体分散体中和厚朴酚以微晶形态分布在载体材料交联羧甲基纤维素钠的表面;初步稳定性试验结果显示,药物溶出速率未发生显著性变化。采用熔融法制得的表面固体分散体制备工艺简单,载药量高,药物以微晶形态存在,其体外溶出速率显著提高,可为和厚朴酚固体制剂的研究与开发提供新的思路和方法。  相似文献   

6.
核黄素极微溶于水,本文采用固体分散体技术以聚乙二醇4000为载体,制备核黄素-PEG4000固体分散物,研究固体分散物的类型,比较不同比例分散物与纯药物的溶出度。  相似文献   

7.
考察了聚合物对阿德福韦酯(AD)-糖精(SAC)共晶形成过程中热力学的影响。选择聚乙二醇、乙基纤维素、聚维酮和聚丙烯酸树脂作为代表性聚合物,通过HPLC法测定了不同温度下AD和SAC在不同聚合物乙醇溶液中的溶解度以及AD-SAC共晶在不同浓度SAC的聚合物乙醇溶液中的溶解度。通过建立数学模型,描述了聚合物及温度对AD-SAC共晶溶解度的影响;依据溶解度数据,构建了AD-SAC共晶的三元相图,预测了共晶溶解度以及共晶产率的变化。结果显示,聚合物的加入提高了共晶的溶解度,共晶的络合常数(K11)减小,溶度积(Ksp)有增大的趋势,共晶反应自由能(ΔG0)的绝对数值呈减小趋势,并且三元相图中不饱和溶液的单相区域以及共晶与其不饱和溶液的两相平衡区域明显增大。因此,聚合物会在不改变共晶生成反应自发性的前提下降低共晶形成速度,降低纯共晶的产率,同时拓宽了制备纯共晶所需AD与SAC溶液的浓度可选择范围。  相似文献   

8.
溶剂对黄芩素-烟酰胺共晶形成热力学的影响   总被引:1,自引:1,他引:0  
考察了黄芩素-烟酰胺共晶在乙酸乙酯、丙酮和氯仿中的形成热力学。通过测定25℃下黄芩素、烟酰胺及黄芩素-烟酰胺共晶在这3种溶剂中的溶解度,建立了不同溶剂中黄芩素-烟酰胺-溶剂三相图。结果显示,黄芩素-烟酰胺共晶在3种溶剂中均符合1∶1溶液络合模型,共晶的形成为热力学自发反应(ΔG0<0),与其他两种溶剂相比,共晶在氯仿中形成的ΔG0绝对值最小,且在氯仿为溶剂的三相图中共晶形成区域远离化学计量比线。本研究利用热力学研究方法为选择共晶制备用溶剂及优化共晶制备条件奠定了理论和应用基础。  相似文献   

9.
尼群地平-泊洛沙姆188固体分散体的制备   总被引:1,自引:0,他引:1  
目的:制备尼群地平-泊洛沙姆188固体分散体,提高其溶出速度和程度.方法:以泊洛沙姆188为载体,按不同此例用熔融法制备固体分散体,测定其在水中的溶解度,并进行体外溶出度研究.结果:随载体所占比例增加,药物在水中的溶解度增加,固体分散体的体外溶出速度明显快于原料药,且随载体比例增大而增加,药物与载体比例为1∶4最佳.结论:尼群地平-泊洛沙姆188固体分散体能显著提高药物的溶出速度和程度,有利于提高其剂型的生物利用度.  相似文献   

10.
<正>在日常生活中,人们常常会问:食盐过多对身体会有危害吗?水肿患者必须限盐吗?盐和肾脏病之间到底有何关系?首先,大量研究证据表明,盐与高血压密切相关,若每日饮食中氯化钠摄入量超过5耀远克,高血压发病率增高;且钠摄入量与血压增高数值密切相关。因此,限制盐的摄入已被各种高血压防治指南列为非药物治疗的重要项目。但是,还应注意不同个体的血压对盐摄入的反应敏感性不同。由高盐摄入引起的血  相似文献   

11.
Objective To observe blood pressure change with age in salt-sensitive teenagers whose salt sensitivity were determined by repeated testing.Methods Salt sensitivity was determined through intravenous infusion of normal saline combined with volume-depletion by oral diuretic furosemide in 55 teenagers. After five years, salt sensitivity was re-examined and subject blood pressure was followed up. Blood pressure changes in salt-sensitive teenagers were compared to that of non-salt sensitive teenagers over five years.Results After 5 years, the repetition rate of salt sensitivity determined by intravenous saline loading is 92.7%. In teenagers with salt sensitivity on the baseline, both the systolic blood pressure increments and increment rates were much higher than non-salt sensitive teenagers (12.7±12.1 mmHg vs. 2.8±5.2 mmHg, P< 0.01; 12.2%± 12.0% vs. 2.5% ±4.4%, P< 0.001,respectively). There was a similar trend for diastolic blood pressure (8.4 ± 6.4 mmHg vs. 3.7 ± 6.4 mmHg, P = 0.052; 13.2% ±10.6 % vs. 6.8%± 10.1%, P = 0.053, respectively).Conclusions Salt sensitivity determined by intravenous saline loading showed good reproducibility. Blood pressure increments with age were much higher in salt-sensitive teenagers than non-salt sensitive teenagers, especially in terms of systolic blood pressure.  相似文献   

12.
Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P < 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (>0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P <0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P < 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.  相似文献   

13.
Objective: To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods: SD rats served as both donors and recipients. 4℃ sodium lactate Ringer's was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava (IVC) inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results: Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion: This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.  相似文献   

14.
Increasing maternal age is the only etiological factor unequivocally linked to Down's syndrome in humans. The occurrence rate of newborns with Down's syndrome is about 1/220 in women over 35 years old. However, the occurrence rate in embryos fertilized in vitro, of the elder woman is unclear. Using FISH we screened the number of chromosome 21 in preimplanted embryos of 5 elderly women (average age, 38.4 years) to study the feasibility and necessity of screening trisomy 21 in embryos in patients over 35 years old at the in vitro fertilization (IVF) center.  相似文献   

15.
Real-time three-dimensional echocardiography (RT3DE)is a new ultrasound technique that enables dynamic threedimensional visualization and quantification of the heart in real time. Investigation of feasibility and methodology of RT3DE in determining left ventricular (LV) and right ventricular (RV) volumes, RT3DE was performed in 35 normal adults using Philips SONOS 7500 system with a 2-4 MHz matrix array transducer. The 60°×60° "pyramid" volume database was obtained and analyzed on a TomTec echo workstation. Both LV and RV volumes were calculated with four 3DE methods (i.e. apical 2, 4, 8, and 16-plane) through manually tracing ventricular endocardial borders in end diastole and end systole. Stroke volumes were then calculated. LV volume was also measured by 2DE Simpson's rule using GE VIVID 7 ultrasound machine.  相似文献   

16.
A clinical guideline for the therapeutic interventions of integrative medicine may be defined as a written document which states a series of recommendations on therapeutic interventions of integrative medicine for a special disease or condition. The guideline may provide assistance to medical professionals in making clinical decisions aimed at improving the clinical outcome of patients and reducing the costs of medical care(~'4~. Recommendations issued by a guideline should be based on the best available evidence in both Western and Chinese medicine. For fulfilling this purpose, the development of clinical guidelines for therapeutic interventions in the field of integrative medicine should follow scientific principles and undergo a rigorous processes.  相似文献   

17.
Objective:To probe into the influence of changes of ovarian hormones on the pathogenesis of the specific sub-type premenstrual syndrome(PMS)and reveal partial microcosmic mechanisms of adverse flow of liver-qi.Methods:Estradiol(E2)and progesterone(P)levels in serum were determined at different phases of menstrual cycle by radioimmunoassay.Results:In the group of PMS with adverse flow of liver-qi.the secretive peak value Of E2 and P at the follicular phase significantly decreased,and the secretive peak value at the luteal phase did not come into being.Conclusions:Low E2 and P secretive peak at the follicular phase and absence of secretive peak at the luteal phase is one of the microcosmic mechanisms of PMS with adverse flow of liver-qi.One of the pathophysiologic mechanisms of specific sub-type PMS is probably the continuous low level of E2and P.  相似文献   

18.
Journal of Nanjing Medical University (English Edition) JNMU, sponsored by Nanjing Medical University, was established in 1987. It is a bimonthly comprehensive English medical journal published locally and abroad.Since 2007, Journal of Nanjing Medical University (English Edition )was granted Elsevier the full publishing and distribution rights worldwide for the Electronic Edition, excluding the People's Republic of China.  相似文献   

19.
目的:评价使用安心颗粒对急诊经皮冠状动脉介入术(PPCI)术后生活质量的影响.方法:将160例接受PPCI的急性ST段抬高型心肌梗死患者随机分为安心颗粒组(术前顿服安心颗粒8.8g,术后安心颗粒4.4 g/次,每日2次)和对照组(仅接受基础药物治疗).所有患者均服用阿司匹林、氯吡格雷和阿托伐他汀.分别在入院时、出院前1d、出院后180 d时,应用心肌梗死多维度量表(MIDAS)、中文版SF-36评价量表对患者生活质量评分.并观察术后30 d以内的出血并发症、血小板减少症发生情况.结果:入院时和出院前1d,两组患者的心肌梗死MIDAS、SF-36量表评分比较无差异(P>0.05);出院后180 d时,与对照组比较,安心颗粒组MIDAS、SF-36评分明显减低(P<0.05);组内与入院时比较,两组出院前1d、出院后180 d时,MIDAS、SF-36评分均降低(P<0.05).两组患者在随访期间均无大量出血、少量出血、重度和极重度血小板减少症发生,安心颗粒组有4例、对照组有7例发生不明显出血(P>0.05).两组发生轻度血小板减少症的患者数比较无差异(P>0.05).结论:PPCI使用安心颗粒,能改善急性ST段抬高型心肌梗死患者的生活质量,且不增加出血风险.  相似文献   

20.
Objective To measure Derpl and Blot5 allergen levels in asthmatics' homes in Hongkong.Methods Seventy houses were enrolled for a mite indoor environment study. Dust samples were obtained from two sites of each patients' house: bed and floor. Derpl and Blot5 levels were quantified by a two-site monoclonal antibody-based ELISA technique.Results The levels of Derpl allergens found in bed (geometric mean (GM) 3.43 μg/g of dust; 95%CI, 1.89-4.96 μg/g)and on the floor (GM 1.12 μg/g of dust; 95%CI, 0.71-1.53 μg/g) indicated significant differences (P=0.005). However, the levels of Blot5 allergens found in bed (GM 19.00 μg/g of dust; 95%CI, 0.89-38.90 μg/g) and on the floor (GM 6.14 μg/g of dust; 95%CI, 0.40-11.90 μg/g) showed no statistically significant difference. In addition, in regards to the exposure index for Derpl and Blot5 allergens found in bed and on the floor, 17.6% in bed and 8.6% on the floor had levels of Blot5 ≥ 10 μg/g of dust, higher than those obtained for Derp1 (7.2% and 0% in bed and on the floor respectively, P< 0.05); higher percentages in bed and on the floor (25.0% and 35.7%) were observed for levels of Blot5 =0 μg/g of dust as compared with Derpl in bed and on the floor (4.3% and 14.5% respectively, P< 0.05).Conclusions Derpl and Blot5 are the major allergens found in this regional study, Blot5 is a more potent allergen in Hongkong, probably reflecting the high level of exposure to Blomia tropicalis (Bt). Bt and Dermatophagoides pteronyssinus (Dp) allergens should be included for precise diagnosis and effective immuno-therapeutic treatment of mite allergy in Hongkong.  相似文献   

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