Ureterocele in adults. Five case reports

The authors report five cases of ureterocele during six years. Mean age of the patients was 34.2 +/- 11.1 years. There were four female and one male. Pain (N = 3) and dysuria (N = 3) were the most common symptoms at examination. Diagnosis was made by ultrasound (N = 3), IVU (N = 3) or cystoscopy (N = 1). Ureteroceles were bilateral in four cases, unilateral in one case and were always intravesical with single ureter. Two patients presented lithiasis enclosed in the ureterocele. Only four patients had been operated. Surgical treatment was ureterocelectomy with ureteral reimplantation according to Cohen procedure. With mean follow-up of 10.6 +/- 4.7 months results were stable without complications.     

Postnatal development of nicotinamide adenine dinucleotide phosphate-diaphorase-positive neurons in the retina of the golden hamster

The histochemical method was used to investigate the postnatal development of nicotinamide adenine dinucleotide phosphate-diaphorase (NADPH-d) -positive neurons in retinas of the golden hamster. NADPH-d-positive neurons were discernible in the retina at postnatal day (P)1. From P4 onward to adulthood, when the retina acquired its laminated characteristics, NADPH-d- positive neurons were observed in the inner nuclear layer (INL) and the ganglion cell layer (GCL). Results showed that NADPH-d-positive neurons in INL and GCL followed different time courses and patterns in their development. NADPH-d-positive neurons in INL underwent a sharp increase from P4 to P8 (3.6-fold), followed by a decrease to 46% of the maximum at P12. This value was maintained relatively constant to the adult level. The mean diameters of NADPH-d-positive neurons in INL, which were smaller than those in the GCL for all ages, increased from P8 to P12 and from P20 to adulthood. As for neurons in the GCL, the increase in cell number was not so apparent for the earlier postnatal days until P20; thereafter, an obvious increase to the adult level was observed. The mean diameters of the NADPH-d-positive cell bodies in the GCL increased with age, except for P16-P20, during which time there was a slight and insignificant decrease. The tendency of changes in cell density was basically similar to that of the total number for both the INL and the GCL. Between P12 and P20, the density distribution map of the NADPH-d-positive neurons underwent dramatic changes: The highest density shifted from the upper central retina at the earlier postnatal days to the lower central retina in the adult. The two waves of increase in NADPH-d-positive neurons coincide with the process of axonal elongation and synaptogenesis and the acquisition of visual function and experience. It is suggested that these NADPH-d-positive neurons are related to these two developmental events.     

珠海口岸首次截获褐带蠊

珠海出入境检验检疫局于2003年8月29日从1艘巴拿马籍货轮上捕获1只雌性褐带蠊成虫Supella longipalpa(Fabricius，1798)。该种蜚蠊起源于非洲，在美国是常见室内种，在我国罕见。其主要特征为：有2条淡褐色带状横斑位于翅基部和腹部，因此俗称其为“褐带蠊”。为防止该蜚蠊通过国际航行船舶传入我国，对褐带蠊的形态特征进行描述，以供口岸检疫人员和昆虫研究人员鉴别之用。     

脑梗死患者血清IL-6和TNF检测的临床意义

目的探讨白细胞介素-6（IL-6）和肿瘤坏死因子（TNF）在脑梗死过程中所起的作用和临床意义。方法采用ELISA方法测定42例脑梗死患者和40例同龄健康体检者血清IL-6和TNF含量,并分析它们与梗死体积的关系。结果急性脑梗死患者血清IL-6和TNF明显高于对照组,它们与脑梗死体积存在明显相关性。结论IL-6和TNF参与了急性脑梗死的发生发展。     

EFFECTS OF SUPEROXIDE DISMUTASE ON SOME BIOLOGICAL CHARACTERISTICS OF LUNG CANCER CELLS IN VIVO AND IN VITRO

The present study observed the effects of superoxide diamutase (SOD) and its Inhibitor, diethyldithiocarbamate (DDC), on the metastasis of Lewis Lung cancer and some biological characteristics of A548 lung cancer cell line. It was found that SOD and DDC inhibited significantly the metastasis of Lewis lung cancer In C57 BL mice, which the effect of DDC was more significant than that of SOD, and decreased the proliferation of A549 lung cancer cell and its transplantation rate in nude mice.     

白酒中敌敌畏的固相微萃取

用大口径毛细管柱气相色谱法、氢焰离子化检测器进行分析测定。该方法在０．５～１２ｍｇ／Ｌ浓度范围内有很好的线性关系。相关系数为０．９９８３；最低检测浓度可达０．０５ｍｇ／Ｌ。本方法把样品的萃取浓缩与进样分析一体化完成。整个分析过程不使用任何萃取溶剂     

高效液相色谱法测定血浆中洛美沙星浓度及其在人体内药代动力学

建立了人血浆洛美沙星的反相离子对高效液相色谱测定方法。该法简便易行,精密度好,方法回收率95～102%,日内、日间RSD为2.1～7.8%,血药浓度在0.125～5.012 μg/ml范围内呈线性关系,相关系数0.9998,当S/N=2时,最小检测浓度为25 ng/ml。健康志愿者口服400 mg洛美沙星,药代动力学过程符合一室模型,消除相半衰期为5.5 h。     

Cadmium Pollution in Paddy Soil as Affected by Different Rice (Oryza sativa L.) Cultivars

No abstract available.     

Use of mandelic acid condensation polymer (SAMMA), a new antimicrobial contraceptive agent,for vaginal prophylaxis

OBJECTIVE: To assess the contraceptive properties, antimicrobial activity, and safety of mandelic acid condensation polymer (SAMMA). DESIGN: Experimental study of SAMMA's in vitro and in vivo properties. SETTING: Academic research laboratories. PATIENT(S): Healthy volunteers for semen donation in an academic research environment. INTERVENTION(S): Inhibition of sperm function indicators, conception, sexually transmitted infection-causing pathogens (including HIV), and lactobacilli was evaluated. Safety indicators were studied. MAIN OUTCOME MEASURE(S): Quantitation of SAMMA's effect on microbial infectivity or multiplication and on sperm function in vitro; evaluation of contraceptive efficacy in vivo; assessment of safety in vitro and in vivo. RESULT(S): Mandelic acid condensation polymer is not cytotoxic toward lactobacilli, microbial host cells, and spermatozoa. The compound inhibits hyaluronidase and acrosin, induces sperm acrosomal loss, and is contraceptive in the rabbit model. Mandelic acid condensation polymer prevents infectivity of HIV and herpesviruses 1 and 2 and, to a lesser extent, of Chlamydia trachomatis. It inhibits the multiplication of Neisseria gonorrhoeae. Mandelic acid condensation polymer is not mutagenic, has low acute oral toxicity, and is safe in the rabbit vaginal irritation assay. CONCLUSION(S): Mandelic acid condensation polymer inhibits sperm function, is contraceptive, has broad-spectrum antimicrobial activity, and is highly safe. Further development as a microbicide is warranted.     

升主动脉粥样硬化患者的冠状动脉旁路移植

目的 总结冠状动脉粥样硬化性心脏病合并升主动脉粥样硬化患者冠状动脉旁路移植手术的特点。方法 22例患者中,13例采用非体外循环、心脏不停跳下冠状动脉旁路移植术(59％);9例采用低温体外循环(41％),其中5例在深低温、低流量并间断停循环条件下不阻断升主动脉行旁路-升主动脉近端吻合。结果 20例康复出院,术后早期死亡2例;并发症有肺部感染、心绞痛、室颤、急性心肌梗死和血胸,无神经系统并发症。结论 减少术中升主动脉操作是防止升主动脉损伤和减少并发症的关键。应用带蒂动脉旁路、旁路远端序贯吻合和近端Y形吻合可避免或减少旁路-升主动脉吻合;低温体外循环加左心室引流时,可不阻断升主动脉行旁路远端吻合;深低温、低流量并间断停循环下行旁路-升主动脉吻合,可避免阻断和部分阻断升主动脉,利于控制并发症。