芥子碱提取工艺的研究

目的探讨不同提取条件和不同提取方法对芥子碱提取得率与效率的影响。方法采用正交实验,考察提取时间、提取温度、料液比3个因素的影响,建立芥子碱热醇提取的最佳提取条件。并在此基础上,研究微波、超声波辅助提取对芥子碱提取效率的影响。结果热醇提取优化工艺条件是A2B2C3即提取时间为4.5h,料液比为1∶30,提取温度为80℃。微波辅助提取与热醇提取相比提取效率提高了89%,而超声波辅助提取与热醇提取相比提取效率提高了85%。结论不同提取条件显著影响芥子碱提取得率,微波与超声波辅助提取可大大提高芥子碱提取效率。     

AgNOR检测在卵巢良、恶性肿瘤鉴别诊断中的价值

目的:AgNOR检测应用于卵巢肿瘤的鉴别诊断。方法:选择已确诊94例卵巢肿瘤,良性卵巢粘液性囊腺瘤47例,卵巢粘液性囊腺癌24例,交界性卵巢囊腺瘤23例。分别对三组进行Ag-NOR检测。结果:良恶性两组比较有显著差异(p<0.01)、交界组界于两面者之间。结论:AgNOR计数与肿瘤的恶性度大体上呈正比,对良恶性卵巢肿瘤鉴别及分类,分型、分级有一定价值。     

侧卧位防旋股骨近端髓内钉辅助桥接内固定系统治疗31A2型股骨转子间骨折的疗效分析

目的 探讨侧卧位下应用防旋股骨近端髓内钉(proximal femoral nail antirotation,PFNA)辅助桥接内固定系统(ortho-bridge system,OBS)治疗31A2型股骨转子间骨折的临床疗效和分析.方法 研究对象选择厦门大学附属福州第二医院创伤骨科2019年1月至2019年12月收...     

Outstanding flame retardancy for poly(vinyl alcohol) achieved using a resveratrol/tannic acid complex

Resveratrol/tannic acid-poly(vinyl alcohol) (RETA-PVA) blends have been prepared by compression molding using poly(vinyl alcohol), tannic acid and resveratrol as raw materials. The effects of different resveratrol/tannic acid ratios on the flammability of RETA-PVA blends have been studied. The flammability of the RETA-PVA blends was assessed using cone calorimetry, thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Results indicate that RETA-PVA molecules occur through hydrogen bonding and RETA-PVA blends are amorphous. The glass transition temperature for RETA-PVA-2 is the highest among all blends and the peak of heat release rate and smoke production rate for RETA-PVA is 38.4% and 43.9% lower than that for PVA, respectively. With the addition of resveratrol, the residual amount of RETA-PVA after complete combustion is greatly increased, to 30 times that for PVA, indicating that RETA-PVA blends display excellent flame retardant properties.

The rigid molecular structure of biobased resveratrol/tannic acid (RETA) complex increases the residual amount of RETA-poly(vinyl alcohol) after complete combustion.     

Regional training-induced alterations in diaphragmatic oxidative and antioxidant enzymes

We examined the relationship between the intensity and duration of exercise training and the up-regulation of diaphragmatic oxidative and antioxidant enzyme activities. Nine groups of rats exercised for 10 weeks (4days/week). Groups of animals exercised at three intensities (low, moderate, and high); at each exercise intensity, a group of animals ran at one of three exercise durations (30, 60, and 90 min/day). Sedentary animals served as controls. Muscle oxidative capacity was assessed by citrate synthase (CS) activity while antioxidant capacity was evaluated by total superoxide dismutase (SOD) and total glutathione peroxidase (GPX) activities. All intensities and durations of exercise training promoted significant (P<0.05) increases in costal diaphragmatic CS, SOD, and GPX activities. Increases in costal CS, SOD, and GPX activity were independent of the exercise intensity and duration. High and moderate intensity exercise of 90 min duration significantly elelevated (P<0.05) crural diaphragm CS activity. Further, high and moderate intensity exercise of durations ≥60 min promoted significant (P<0.05) increases in crural diaphragm SOD activities. Exercise did not influence (P>0.05) crural diaphragm GPX activity. We conclude that the training threshold for up-regulation of oxidative and antioxidant enzyme activities differs between the costal and crural diaphragm.     

大学生婚前性行为和性态度现状分析

目的 了解大学生婚前性行为现状及其态度与发展趋势。方法 采用分层整群抽样抽取福建师范大学900名学生进行无记名问卷调查,有效问卷876份。结果 显示认为贞操观至关重要的占52．6％,对婚前性行为持慎重态度的占76．5％,但也有半数以上的学生对婚前性行为持宽容,默许和赞同态度,甚至有30．1％的学生认为同居是现代的生活方式（男生占42．8％,女生占17．1％）,在被调查人群中,有过婚前性行为的占5．5％（男性占8．3％,女性占2．5％）。结论 目前大学生婚前性行为虽然还不普遍,但性态度已开始发生变化,应及时给予正确的引导,教育。     

应用体外分离培养破骨细胞的技术评价人工骨

本文介绍如何应用分离培养破骨细胞的技术评价人工骨。家兔48只,随机分成A、B、C、D四组,每组12只,人工造成家兔同侧桡骨10mm缺损。分别植入不同材料的骨移植物,A组为珊瑚羟基磷灰石,B组为人工合成羟基磷灰石,C组为人工多聚体,D组为自体骨。移植术后6、8、12、16周,分期处死动物,取出植入动物体内骨移植物并制成骨磨片,与体外分离的破骨细胞共同培育1周,扫描电镜发现,破骨细胞能够在植入动物体内的人工骨片上产生骨吸收。实验比较表明各组植骨材料的成骨能力依次为:自体骨>珊瑚羟基磷灰石>人工合成羟基磷灰石>人工多聚体(P<0.01或P<0.05),珊瑚羟基磷灰石的成骨能力优于其它两种人工骨,但逊于自体骨。