医院中心供氧实时监控系统的CAN总线接口设计

本文阐述了一种医院中心供氧实时监控系统中CAN总线接口的设计及验证过程。针对医院中心供氧实时监控系统数据传输和控制的要求,采用微处理器MSP430F149搭载CAN协议控制器MCP2515及收发驱动器PCA82C250实现。验证结果表明,该CAN总线接口通过其SPI接口实现了微处理器MSP430F149的CAN接口扩展,可以满足中心供氧实时监控系统数据传输和控制的需求。     

Angiopep-2与转铁蛋白共修饰脂质体跨血脑屏障的研究

【摘要】目的：构建angiopep-2与转铁蛋白共修饰脂质体,并对其理化性质和跨血脑屏障能力进行评价。方法 采用薄膜分散法制备转铁蛋白（TF）与angiopep-2共修饰载脂质体（ANG/TF-LPs）,考察其粒径,电位,血清稳定性等理化特征。通过定量细胞摄取实验考察脑内皮bEnd.3细胞对ANG/TF-LPs的摄取效率。构建血脑屏障体外模型,考察不同脂质体的跨血脑屏障能力。结果 所制备的ANG/TF-LPs粒径为93±13.5 nm, Zeta 电位为7.55±1.85 mV。在24 h内具有良好的血清稳定性。体外细胞摄取实验表明,bEnd.3细胞对ANG/TF-LPs的摄取效率分别是TF-LPs、ANG-LPs和LPs的2.9倍、2.4倍和4.8倍,差异具有统计学意义（P<0.01）;ANG/TF-LPs的跨血脑屏障效率分别是TF-LPs、ANG-LPs和LPs的3.1倍、2.9倍和6.8倍,差异具有统计学意义（P<0.01）。结论 ANG/TF-LPs制备工艺简单,经过angiopep-2与转铁蛋白修饰后,脂质体的跨血脑屏障能力显著增强,是一种潜在高效的脑部靶向给药系统。     

Mutagenicity and Genotoxicity in Gill Erythrocyte Cells of Poecilia reticulata Exposed to a Glyphosate Formulation

Poecilia reticulata were exposed to herbicide Roundup Transorb^® for micronucleus test, nuclear abnormalities and comet assay. The exposure-concentrations were based on CL_50–96 h following 0, 1.41, 2.83, 4.24 and 5.65 μL L^?1 for 24 h. Micronucleus and comets were significantly increased in the gill erythrocyte cells after herbicide exposure compared with the non-exposed group. Results showed a gradual increase in the number of damaged cells, indicating a concentration-dependent effect and that this herbicide was mutagenic and genotoxic to P. reticulata and this effect could be attributed to a combination of compounds contained in the formulation with the active ingredient glyphosate.     

HEMATURIA FROM LEFT INTERNAL PUDENDAL AND OBTURATOR ARTERIAL BLEEDING FOLLOWING SEXUAL INTERCOURSE

Bladder tamponade is an uncommon clinical symptom among men who experience suffering related to sexual intercourse. The authors report on a 46-year-old man with this symptom 4-5 years before hospitalization. Angiography confirmed the presence of left pudendal and obturator arterial bleeding, and embolotherapy of the internal pudendal and obturator arteries was performed. There was no mortality, or limb loss or loss of sexual potency at follow-up.     

儿童龋病与唾液CCL28 和sIgA 抗体的相关性

目的：探讨儿童唾液中趋化性细胞因子CCL28含量和sIgA 抗体分泌与儿童患龋状况之间的联系。方法： 抽取长沙市两所幼儿园3~5岁108名幼儿进行龋齿检查,根据检查结果分为无龋组[龋失补指数(dynamical mean-field theory,DMFT)=0];低龋组(DMFT=1~4);高龋组(DMFT≥5),收集非刺激性全唾液样本,用酶联免疫吸附试验 (ELISA) 定量检测唾液中 CCL28及sIgA的含量,并对结果进行统计学分析。结果：108名儿童唾液中CCL28的浓度为 (121.22±32.63) pg/mL,sIgA 的浓度为(16.49±8.02) μg/mL,两者之间存在线性正相关关系(r=0.734),且儿童唾液样本中 CCL28和sIgA含量随儿童患龋程度而增加(P<0.05)。结论：儿童龋患能够促进CCL28和sIgA分泌,且CCL28和sIgA的分 泌量与龋患程度呈正相关;CCL28对唾液中sIgA 的分泌起促进作用。     

甲状腺功能亢进症术后复发的再手术治疗:附34例报告

目的 探讨甲状腺功能亢进症(甲亢)术后复发的原因，再手术治疗的适应证及手术方法。方法 回顾性分析34例甲亢术后复发再手术治疗的l临床资料。结果 再次手术术式包括双侧甲状腺次全切除29例，单侧腺叶切除5例。全部治愈。并发症发生率5．9％，与笔者收治的同期甲亢初次手术比较无统计学差异。全组经随访l～l0年，无甲亢再复发或甲状腺功能低下者。结论 腺体残留过多是甲亢术后复发的主要原因，有选择地再手术是甲亢术后复发较好的治疗方法。术中仔细解剖可避免损伤喉返神径和甲状旁腺，以及预防大出血的发生。     

Intrauterine Exposure to Maternal Diabetes is Associated with Adiposity in Children at 6 Years of Age in China

Children born to mothers with gestational diabetes mellitus(GDM)are more likely to exhibit congenital malformations,high birth weight,and obesity and have an increased risk of developing type 2 diabetes in later life.Children who are exposed to maternal diabetes in utero may be‘programmed’for later development of obesity at a critical period of development.Therefore,the