参苓白术颗粒联合思密达治疗小儿消化不良性腹泻临床研究

目的:观察参苓白术颗粒联合思密达对小儿消化不良性腹泻的临床效果。方法:将小儿消化不良性腹泻114例按照随机数字表法分为2组各57例,对照组给予思密达进行治疗,观察组在对照组基础上加入参苓白术颗粒,对比临床治疗效果。结果:对照组总有效率为75.44%,观察组为91.22%,2组比较,差异有统计学意义(P<0.05)。观察组平均停止腹痛、腹泻、腹胀以及大便性能恢复正常的时间较对照组短,差异有统计学意义(P<0.05)。治疗后9 d,2组炎症因子水平较前下降,且观察组低于对照组,差异有统计学意义(P<0.05)。2组不良反应发生情况比较,差异无统计学意义(P>0.05)。结论:针对小儿消化不良性腹泻采用参苓白术颗粒联合思密达治疗,临床症状缓解更快,可加速患儿恢复肠胃功能,有效减轻患者炎症反应,用药安全。     

First-Principles Computational Study of the Modification Mechanism of Graphene/Graphene Oxide on Hydroxyapatite

Due to its unique crystal structure and nano-properties, hydroxyapatite (HA) has become an important inorganic material with broad development prospects in electrical materials, for fire resistance and insulation, and in bone repair. However, its application is limited to some extent because of its low strength, brittleness and other shortcomings. Graphene (G) and its derivative graphene oxide (GO) are well known for their excellent mechanical properties, and are widely used to modify HA by domestic and foreign scholars, who expect to achieve better reinforcement and toughening effects. However, the enhancement mechanism has not been made clear. Accordingly, in this study, G and GO were selected to modify HA using the first-principles calculation method to explore the theory of interfacial bonding of composites and explain the microscopic mechanism of interfacial bonding. First-principles calculation is a powerful tool used to solve experimental and theoretical problems and predict the structure and properties of new materials with precise control at the atomic level. Therefore, the bonding behaviors of hydroxyapatite (100), (110) and (111) crystal planes with G or GO were comprehensively and systematically studied using first-principles calculation; this included analyses of the density of states and differential charge density, and calculations of interfacial adhesion work and elastic moduli. Compared to HA (100) and (111) crystal planes, HA (110) had the best bonding performance with G and with GO, as revealed by the calculation results. The composite material systems of HA (110)/G and HA (110)/GO had the smallest density of states at the Fermi level, the largest charge transfers of Ca atoms, the largest interfacial adhesion work and the most outstanding elastic moduli. These results provide a theoretical basis for the modification of HA to a certain extent, and are beneficial to the expansion of the scope of its application.     

苓桂术甘汤配伍机制及药效物质基础研究

目的：研究《伤寒论》名方苓桂术甘汤（茯苓，桂枝，白术，甘草）的配伍机制及药效物质基础。确定方中各药味的君臣佐使关系和质量控制指标。方法：采用正交试验设计对方中组成药味进行药味与药量同时加减拆方。选择小鼠常压耐缺氧，对抗氯仿所致小鼠心律失常和利尿三项药理指标对所得16个处方进行药理实验；采用方差分析，逐步回归分析（SREG）与典型相关分析（CCOR）将所得药理数据和组方药味及药理相关联，探讨复方苓桂术甘汤的配伍机制；同时对各处方进行HPLC色谱指纹图谱研究。将所得药理数据和各指纹峰的峰面积（即各化合物的含量）相关联，探讨复方苓桂术甘汤的药效物质基础。并确定其质量控制指标。结果：确定了方中以茯苓为君。以桂枝为臣，佐以白术，使以甘草的配伍关系，与对该复方中药的传统诠释相一致；通过回归分析和相关分析从50个色谱峰中选取17个作为药效物质基础，其中桂皮酸，甘草酸和去氢土莫酸被确定为质量控制指标。结论：本研究为探讨复方中药的药效物质基础提供了有意义的尝试。     

安徽亳州板蓝根种质资源的调查研究

目的 :为制定板蓝根规范化种植的操作规程提供依据。方法 :进行安徽亳州板蓝根的种质资源调查和种子染色体的鉴定研究。结果 :安徽亳州板蓝根种质资源有四倍体菘蓝和二倍体菘蓝。结论 :确定二倍体菘蓝为板蓝根规范化种植的种质资源。     

丁香油β-环糊精包合前后化学成分的GC-MS分析

目的对β-环糊精包合前后的丁香油组分进行分析。方法采用GC-MS法对化学成分进行分离鉴定。DB-1毛细管气相色谱柱,程序升温:60℃(1min)10℃/min230℃(3min);分流进样,分流比:1∶50;进样口温度:230℃,MS检测。结果经GC-MS分析,包合前后丁香油主要成分基本一致,但各组成比例发生变化。结论β-环糊精对化合物的包合会使丁香油化学成分的比例在包合前后发生一定的变化。     

产ESBLs肠杆菌科细菌对氨基糖苷类抗生素耐药机制研究

目的研究产超广谱β-内酰胺酶（extended spectrum beta-lactamases，ESBLs）肠杆菌科细菌对氨基糖苷类抗生素的耐药分子机制。方法采用PCR方法对耐氨基糖苷类抗生素的产ESBLs菌株进行氨基糖苷类耐药机制研究，并同时对钝化酶基因DNA测序，进行网上基因相似性检索。结果20株耐氨基糖苷类的产ESBLs肠杆菌科细菌中存在氨基糖苷钝化酶基因，分别有aac（3）-Ⅰ、aac（3）-Ⅱ、aac（6’）-Ⅰ、aac（6’）-Ⅱ、ant（2”）-Ⅰ和aph（3’）-Ⅵ，以aac（3）-Ⅰ、aac（3）-Ⅱ和aac（6’）-Ⅰ为主。部分菌株同时可含有多种钝化酶基因。DNA测序分析结果与国外报道已知相应氨基糖苷钝化酶DNA测序结果一致。结论产ESBLs肠杆菌科细菌中普遍存在氨基糖苷钝化酶，四川大学华西医院分离得到的氨基糖苷类耐药的产ESBLs肠杆菌科细菌的钝化酶基因型主要是aac（6＇）-Ⅰ，aac（3）-Ⅱ,aac（3）-Ⅰ和ant（2″）-Ⅰ。     

红外热成像对蚕沙外熨辅助治疗糖尿病胃轻瘫的疗效评价研究

目的 研究采用蚕沙外熨腹部的方法辅助治疗糖尿病胃轻瘫的有效性,探讨治疗过程中红外热成像对临床疗效评价的作用.方法 将110例糖尿病胃轻瘫患者随机分为治疗组55例、对照组55例.其中治疗组脱落3例,完成病例观察52例,脱落率为5.45％;对照组脱落5例,完成病例观察50例,脱落率为9.09％.2组均予基础治疗,治疗组在基...     

普伐他汀抑制oxLDL诱导的人外周血单核细胞CD11b表达及与内皮的粘附

目的探讨普伐他汀对氧化修饰低密度脂蛋白（ｏｘＬＤＬ）诱导的人外周血单核细胞（ＰＢＭｓ）粘附功能的影响,揭示其除调脂外的抗炎作用。方法在体外分离培养人ＰＢＭｓ和脐静脉内皮细胞（ＨＵＶＥＣ）,ＰＢＭｓ经ｏｘＬＤＬ诱导后,应用流式细胞仪和β Ｎ 乙酰氨基己糖苷酶比色法,检测单核细胞粘附分子ＣＤ１１ｂ表达及对ＨＵＶＥＣ的粘附,以及普伐他汀的作用。结果普伐他汀在５０μｍｏｌ·Ｌ－１即可抑制ｏｘＬＤＬ诱导的ＰＢＭｓ对ＨＵＶＥＣ的粘附以及下调ＣＤ１１ｂ的表达（Ｐ＜００１）,呈浓度依赖方式;甲羟戊酸可对抗此抑制作用。结论普伐他汀除调脂作用外,尚可抑制循环血单核 巨噬细胞至内皮粘附聚集,具有抗炎作用;其机制与普伐他汀抑制胆固醇前体物质甲羟戊酸生成有关。