辣根过氧化物酶标记电化学聚合间苯二胺膜的研制

探讨了电聚合间苯二胺(PDA)膜的电化学聚合、活化及偶联辣根过氧化物酶(HRP)的条件及其性能,结果表明:制成的膜较薄(<1.0μm),在电极表面结合牢固,电聚合膜上有较多可供生物活性材料偶联的氨基,经戊二醛共价交联在膜上的HRP与膜结合牢固,在样品检测中性能稳定,重现性较好,使用及保存寿命较长,是制备生物传感器的良好膜材料,可望在免疫电极及微型电极方面应用

抗肺癌免疫光敏剂的制备及其杀伤作用

以碳二亚胺(EDCI)为连接剂将抗肺癌单克隆抗体(McAb 3D3与血卟啉衍生物(HpD)共价连接,制备成免疫光敏剂,经ELISA法测定及溶血试验,结果表明偶联物保留了 McAb的反应性及HpD的光敏活性,偶联物经紫外光谱及荧光光谱扫描分析表明,偶联HpD与非偶联HpD的光谱特性有所差别,体外杀伤试验表明,偶联物的杀伤效率提高了10.5倍,且对非靶细胞的杀伤作用微弱,证明HpD与McAb偶联后,对靶细胞具有特异杀伤作用,可为肿瘤的治疗提供一种新的药物

半月板损伤患者膝周肌肉的表面肌电图分析

目的探讨半月板损伤对膝周肌肉功能的影响。方法 2017年2月至2018年2月,单侧半月板损伤患者22例,记录下蹲、站起和屈膝70°最大等长收缩时,健、患侧股外侧肌、股直肌、股内侧肌和股二头肌的表...福州市卫生计生系统科技计划项目(No.2015-S-wt3);; 福建省卫计委省级临床重点专科建设项目(No.【2018】145)~

Microbial Transformation of Gypenoside from Gynostemma pentaphyllum by Aspergullus glaucus and Its Biological Activities

以福建绞股蓝[Gynostemma pentaphyllum(Thunb)Makino]为材料,经乙醇提取和正丁醇萃取获得绞股蓝皂苷,利用灰绿曲霉(Aspergullus glaucus)微生物转化绞股蓝皂苷,通过测定绞股蓝皂苷和灰绿曲霉转化产物的抗癌、抗酪氨酸酶和抗氧化活性,比较绞股蓝皂苷经微生物转化修饰前后生物活性的差异.结果表明:灰绿曲霉转化产物对肝癌细胞SMMC7721有体外抑制作用,半抑制质量浓度(IC50)为91.66μg/m L,而绞股蓝皂苷抗癌效果不强;绞股蓝皂苷对蘑菇酪氨酸酶活力具有较强的抑制作用,IC50为0.14 mg/m L,其抑制作用属于可逆抑制,抑制类型为混合型抑制作用,而灰绿曲霉转化产物抗蘑菇酪氨酸酶活性较弱;绞股蓝皂苷和灰绿曲霉转化产物分别在0.2和2 mg/m L质量浓度下对DNA氧化损伤有保护作用.研究结果说明绞股蓝皂苷经微生物修饰后,抗癌效果增强,对蘑菇酪氨酸酶抑制作用和DNA氧化损伤保护作用减弱.该研究结果可为利用微生物转化法筛选抗癌绞股蓝皂苷奠定基础.Gynostemma pentaphyllum in Fujian Province was used as the material in this research.Gypenoside was extracted with ethanol and n-butyl alcohol. Gypenoside was microbially transformed by Aspergullus glaucus. The abilities of anticancer,anti-tyrosinase and anti-oxidation in gypenoside and transformation products were measured in our study.The difference of bioactivity between gypenoside and microbially transformed gypenoside was compared.The result showed that the products of transformation by A. glaucus affected the growth of hepatocellular carcinoma cells SMMC7721 with half maximal inhibitory concentration( IC50) values of 91. 66 μg/m L,but the anticancer activity of gypenoside was very weak.Gypenoside had strong inhibition to the mushroom tyrosinase. The value of IC50 was 0. 14 mg / m L. Moreover,the products of transformation by A. glaucus showed little anti-tyrosinase acti-vity.The kinesis study showed that the inhibition of gypenoside to mushroom tyrosinase was reversible and inhibition types were mixed. Gypenoside exhibited the active protective effect on H2O2-induced oxidative-stress damage at the concentration of 0. 2 mg / m L,and the products of transformation by A. glaucus were at 2 mg / m L. This research indicated that the anticancer effect of gypenoside modified by microorganisms was enhanced,but the activity of anti-tyrosinase and H2O2-induced oxidativestress damage became weakened.This study laid the foundation of screening anticancer gypenoside by means of microbial transformation.国家自然科学基金(81274149);; 厦门市科技创新项目(3502Z20132009,3502Z20154083);; 厦门市对台科技合作项目(3502Z20141041

辣根过氧化物酶标间苯二胺膜电极的研制

目前,用作传感器的功能膜材料不多,见诸文献的有:测定梅毒抗体的醋酸乙烯膜,测定二硝基酚(DNP)的聚氯乙烯膜,测定人体免疫球蛋白IgG的聚苯乙烯活性膜等。本文采用电化学聚合方法形成间苯二胺膜,并探讨了电化学聚合、活化、偶联制备辣根过氧化物酶标膜电极的实验条件及其性能。实验证明:聚合膜具有较多的供生物材料偶联的氨基,制成的膜极薄,在电极表面结合牢固,具有抗碱及非氧化性酸腐蚀的

630nm和514.5nm两种波长激光束对人体胃、肺癌细胞株的HpD光敏化光剂量的研究

本工作使用630nm和514.5nm两种波长激光束对不同分化程度的人胃、肺癌细胞株进行HpD光敏化光剂量的比较研究。实验数据显示,514.5nm波长光对体外培养单层癌细胞的光敏杀伤力是630nm光的2—3倍。分析结果还表明,分化程度越低的癌细胞受光敏化的效率越高

人胃粘膜活检标本测氨法诊断幽门螺杆菌感染

目的；探讨人胃粘膜Hp感染的检测法。方法：以纳氏测氨法为基础建立了纳氏试剂快速显色检测人胃粘膜中幽门螺杆菌（Hp）感染的方法，临床检测485例因上消化道症状而行胃镜检查的患者。并以细菌培养、粘膜涂片镜检及血清抗Hp－IgGELISA检测结果为对照。结果：该法的敏感性、特异性、阳性及阴性预测值和诊断效率分别为970％，983％，99．4％，91．3％及95．3％。结论；该法检测Hp感染的原理及特点初步分析表明其与传统尿素酶试验有较大的差别，有一定的实用价值

烧结板布风的甲烷化流化床反应器建模与分析

以烧结板型气体分布器的甲烷化流化床反应器为研究对象,在ANSYS-FLUENT平台中利用用户自定义函数建立了烧结板型气体分布器的数学模型;并对过程反应动力学模型提出了合理的改进,在宏观上实现反应速率与催化剂浓度的正相关。通过模型的计算结果与实验数据对比验证了模型的有效性,在模拟结果的基础上对烧结板型气体分布器的甲烷化流化床反应器的参数分布进行了分析。结果表明:烧结板模型的引入可增强反应器入口边界描述的精确性,对反应动力学模型的合理改进可更好地反映甲烷化反应过程,提高了计算的精确性。国家自然科学基金(21576228

烧结板布风的甲烷化流化床反应器建模与分析

采用双流体模型对烧结板型气体分布器的甲烷化流化床反应器进行数值模拟,在ANSYS-FLUENT平台中利用用户自定义函数建立了烧结板型气体分布器的数学模型;并对过程反应动力学模型进行改进,在宏观上实现了反应速率与催化剂浓度的正相关;通过模型的计算结果与实验数据对比验证了模型的有效性.在模拟结果的基础上对烧结板型气体分布器的甲烷化流化床反应器的参数分布进行了分析,结果表明:烧结板模型的引入增强了反应器进口边界描述的精确性,对反应动力学模型的合理改进更好地反映了甲烷化反应过程,并更符合实验结果,从而提高了模拟计算的精确性.国家自然科学基金(21576228

Development of Trehalose Certified Reference Material

研制了海藻糖国家标准样品。以食品级海藻糖粗品为原料,纯化制备海藻糖,采用红外光谱(Ir)、质谱和核磁共振谱(nMr)以及单晶衍射等方法进行结构确证。样品分装成400瓶后,采用离子色谱法进行均匀性、稳定性检验和定值分析。从样品中随机抽取15瓶进行均匀性检验,经f检验表明,在95%的置信区间范围内,样品均匀性良好。在40℃下,经过24个月稳定性考察,结果表明样品稳定性良好。标准样品经国内8家具有分析资质的实验室进行协同定值,并评定了定值结果的不确定度,海藻糖标准样品定值结果为99.72%,扩展不确定度为0.26%(k=1.96)。该标准样品达到国家标准样品的技术要求,可用于有关海藻糖的方法校正和质量控制。Trehalose certified reference material was developed.Trehalose was purified from the crude product.The structure of trehalose certified reference material was comfirmed by infrared spectroscopy(IR),mass spectrometry,NRM and XRD.Trehalose was divided into 400 bottles.The homogeneity and stability testing and quantitative analysis were evaluated by ion chromatography method.According to analysis procedure of homogeneity,15 bottles of sample were randomly taken from 400 bottles,and the results were validated by F-test statistical methods.The stability inspection was carried on the long-term(24 months),and the results indicated that the period for trehalose storage was 24 months at 40 ℃.A cooperative certification was conducted by 8 qualified laboratories.The certified purity value of the reference material of trehalose was 99.72%with relative expaned uncertainty of 0.26%(k=1.96).The reference material can conform to the technical requirement of the certified reference material,and it can be used for validation and quality control regarding trehalose.福建省科技计划项目(2013N01010205); 厦门市海洋经济创新发展区域示范项目(12PZP001SF10); 海洋公益行业科研专项(201005020–1); 厦门市科技计划项目(3502Z20122009