美洛昔康口腔崩解片中美洛昔康含量测定方法研 究简

目的 建立测定美洛昔康口腔崩解片中美洛昔康含量的反相高效液相色谱法.方法 色谱柱为KromasilC18柱（250 mm×4.6mm,5 μm）,流动相为0.1 mol/L醋酸铵溶液-甲醇（50：50）,柱温为室温,流速为1.0 mL/min,检测波长为271 nm.结果 美洛昔康质量浓度在40 ～ 60 μg/mL范围内与峰面积呈良好线性关系（r=0.999 8）,平均回收率为100.45％,RSD为0.55％（n=9）.结论 该方法简便、灵敏、准确、专属性强、重现性好,为产品的质量标准研究提供了理论依据.     

几种亲水凝胶骨架材料相关性质的比较

以茶碱为模型药物,采用直接压片法制备亲水凝胶骨架片,从骨架片吸水性、膨胀性、溶蚀性及凝胶强度4个方面,全面比较了几种亲水凝胶骨架材料羟丙甲纤维素(hydroxypropylmethylcellulose,HPMC)、聚氧化乙烯(polyethylene oxide,PEO)、海藻酸钠[sodium alginate、低黏度NaAlg(L)、高黏度NaAlg(H)]和黄原胶(xanthan gum,XG)辅料性质和释药机制的差异。结果表明,吸水速率常数XG>>NaAlg(H)>PEO>NaAlg(L)>>HPMC;膨胀指数为XG>>PEO>>HPMC>>NaAlg;溶蚀速率NaAlg(L)>NaAlg(H)>>PEO80>PEO200>PEO300>XG≈PEO400≈K4M>K15M>PEO600≈K100M;凝胶层强度PEO>HPMC>XG>>NaAlg。对于PEO和HPMC骨架片,随着聚合物分子量增加,药物逐渐从以溶蚀机制为主的释放转移为以扩散机制为主的释放;对于NaAlg骨架片,药物主要以溶蚀机制释放;对于XG骨架片,药物主要以非Fick扩散机制释放。通过比较不同高分子材料之间的性能差异有助于合理设计和...     

Resin infiltration of deproteinised natural occlusal subsurface lesions improves initial quality of fissure sealing

The aim of this ex vivo study was to evaluate the infiltration capability and rate of microleakage of a low-viscous resin infiltrant combined with a flowable composite resin (RI/CR) when used with deproteinised and etched occlusal subsurface lesions (International Caries Detection and Assessment System code 2). This combined treatment procedure was compared with the exclusive use of flowable composite resin (CR) for fissure sealing. Twenty premolars and 20 molars revealing non-cavitated occlusal carious lesions were randomly divided into two groups and were meticulously cleaned and deproteinised using NaOCl (2%). After etching with HCl (15%), 10 premolar and 10 molar lesions were infiltrated (Icon/DMG; rhodamine B isothiocyanate (RITC)-labelled) followed by fissure sealing (G-?nial Flo/GC; experimental group, RI/CR). In the control group (CR), the carious fissures were only sealed. Specimens were cut perpendicular to the occlusal surface and through the area of the highest demineralisation (DIAGNOdent pen, KaVo). Using confocal laser-scanning microscopy, the specimens were assessed with regard to the percentage of caries infiltration, marginal adaption and internal integrity. Within the CR group, the carious lesions were not infiltrated. Both premolar (57.9%± 23.1%) and molar lesions (35.3%± 22.1%) of the RI/CR group were uniformly infiltrated to a substantial extent, albeit with significant differences (P=0.034). Moreover, microleakage (n=1) and the occurrence of voids (n=2) were reduced in the RI/CR group compared with the CR group (5 and 17 specimens, respectively). The RI/CR approach increases the initial quality of fissure sealing and is recommended for the clinical control of occlusal caries.     

三年制临床医学专业《医学心理学》教学改革的思路与实践

根据三年制临床医学专业的人才培养目标,考虑到执业医师资格考试对课程的专业需求;从准确定位课程目标,构建以“案例引导＋任务驱动”为主的“基础心理＋临床心理”教学内容体系,应用案例教学、以问题为基础的学习,建设精品课网站、《医学心理学》学校网站、心理测量网站为主的网络教学资源,采用研究报告和网络考试为主的考核手段等方面实施教学改革;构建具有特色的专科临床医学专业《医学心理学》教学模式。     

阿魏酸钠治疗肾病综合征的疗效及对患者尿液AQP2的影响观察

目的探讨阿魏酸钠治疗原发性肾病综合征的临床疗效以及对患者尿液水通道蛋白(AQP2)的影响。方法将43例患者随机分为观察组和对照组,观察组采用常规疗法配合阿魏酸钠治疗,对照组采用常规疗法治疗,比较2组治疗前后尿液AQP2、24 h尿蛋白定量、血浆白蛋白及肾功能等指标的变化。结果治疗后观察组临床疗效优于对照组(P<0.05)。结论阿魏酸钠治疗肾病综合征疗效确切,能显著减少患者尿蛋白、改善患者肾功能,并可有效降低患者肾脏AQP2蛋白表达水平,改善患者水潴留状况。     

以学科教学知识能力促进中医院校教师专业发展

从学科教学知识能力（Pedagogical content knowledge,PCK）的基本概念出发,以开展PCK提升的外部环境、促进教师自主发展和教学观念转变、教师发展价值取向改变等维度阐述PCK对中医院校教师专业发展的重要性,并从高等中医药教育的教师专业发展实际需求出发提出相应的对策。     

高氧对新生大鼠肺泡Ⅱ型上皮细胞上皮钠通道转运功能的影响

目的 探讨高氧对新生大鼠肺泡Ⅱ型上皮(alveolar epithelial typeⅡ,ATⅡ)细胞钠转运功能的影响.方法 分离提取新生大鼠ATⅡ细胞,随机分成高氧组和对照组,分别在氧浓度为85％和21％的细胞培养箱中原代培养.应用Western blot方法和全细胞膜片钳技术检测高氧暴露后上皮钠通道(epithelial sodium channel,ENaC)蛋白表达变化及高氧对阿米洛利敏感性钠电流的影响.结果 高氧使新生大鼠ATⅡ细胞中β-ENaC和γ-ENaC表达增加[β-ENaC:(1 d:0.43±0.06 vs0.32 ±0.04,P=0.047;2 d:0.73 ±0.06 vs 0.50±0.08,P=0.019;3 d:0.72±0.08 vs 0.52±0.06,P=0.027);γ-ENaC:(1 d:0.64 ±0.05 vs 0.53 ±0.05,P =0.044;2 d:0.76 ±0.03 vs 0.52 ±0.04,P =0.001;3 d:0.77±0.06 vs 0.61 ±0.05,P=0.025)],同时使阿米洛利敏感性钠电流增强(1 d:13.71±2.77 vs 8.92±1.38,P＜0.001;2 d:29.12±11.03 vs 10.41±1.80,P＜0.001),面对α-ENaC表达表现出一定的抑制作用(1 d:0.31 ±0.05 vs 0.46 ±0.05,P =0.025;2 d:0.30 ±0.01 vs 0.38 ±0.02,P =0.002;3 d:0.37 ±0.06vs 0.37 ±0.08,P=0.983).结论 高氧促进了 ATⅡ细胞ENaC钠转运功能,ENaC功能障碍并非高氧暴露后肺水肿发生的主要原因.     

Subacute oral toxicity investigation of selenium nanoparticles and selenite in rats

Selenium (Se) nanoparticles have been proposed as food supplements. However, the particle formulation may exert unexpected toxicity. The aim was therefore to compare toxicity of low doses of Se nanoparticles and the dissolved, ionized Se species selenite. Female rats were dosed orally for 28?d with either: 0.05, 0.5, or 4?mg Se/kg body weight (bw)/day as 20?nm Se nanoparticles or 0.05 or 0.5?mg Se/kg bw/day as sodium selenite. Male rats were dosed 4?mg Se/kg bw/day as Se nanoparticles. Body weight and clinical appearance were recorded throughout the experiment. At necropsy, blood samples were taken for hematological and clinical chemistry analyses; organ weights were recorded. At the high-dose of Se nanoparticles, overt toxicity occurred and the female animals had to be euthanized prematurely, whereas the male animals were reduced in dose. At all doses of Se nanoparticles and at 0.5?mg Se/kg bw/day as selenite, a lower body weight gain as compared to vehicle occurred. Relative liver weight was increased for both Se formulations at 0.5?mg Se/kg bw/day. Creatinine clearance and urinary pH were affected in some Se dosed groups. There were no effects among dosed groups on brain neurotransmitters or on hematological parameters compared with controls. There were no histological changes in the livers of animals exposed to Se nanoparticles or to selenite. Based on effects on body weight and liver weight, selenium nanoparticles and ionic Se exerted similar toxicity. This suggests that a nanoparticle-specific toxicity of Se did not occur.     

52例头孢曲松钠不良反应分析

目的：探讨头孢曲松钠不良反应发生的特点及相关因素,为临床合理用药提供参考。方法：采用回顾性研究方法,对上海交通大学附属第一人民医院2006年1月-2012年12月上报的因使用头孢曲松钠出现的52例不良反应报告进行统计和分析。结果：头孢曲松钠所致不良反应主要为皮肤及附件损害（33例,63.5%）和过敏性休克（5例,9.6%）。结论：应加强对头孢曲松钠不良反应的监测,注意其过敏性休克等严重不良反应,保障用药安全。     

白细咳喘膏中芥子碱硫氰酸盐的含量测定

目的测定白细咳喘膏中芥子碱硫氰酸盐的含量,为制定该制剂的质量标准奠定基础。方法采用HPLC法,色谱柱:DIKMA inertsil(pH=3,5μm,250mm×4.6mm);以乙腈为流动相A,以3%醋酸溶液为流动相B,按比例进行梯度洗脱;检测波长:326nm;流速:1.0mL/min;柱温:室温。结果线性范围为0.8～4.0μg(r=0.9996,n=5),平均回收率100.83%,RSD=1.95%(n=5)。结论该法快速、简便,重现性和稳定性良好,可用于该制剂的质量控制。