高血压病人的甲壁微循环改变

高血压病人的甲壁微循环改变山西省眼科医院（０３０００２）雷小平宋锁弟关姣莲为了探讨高血压病人的微循环改变，我们对高血压病人进行了甲壁微循环检查，结果如下。１资料和方法１．１对象：本院门诊的原发性高血压（ＥＨ）组４０例，均符合１９７８年ＷＨＯ高血压诊断...

甲基质部分切除并利用甲侧壁皮瓣重建甲沟治疗嵌甲症

目的：探讨甲基质部分切除并根据不同的嵌甲利用甲侧壁皮瓣重建甲沟，治疗嵌甲的手术方法。方法：切除部分甲体、甲床，根据不同的嵌甲设计不同的手术方法，利用甲侧壁皮瓣重建甲沟。结果：2003年10月~2006年10月对85例嵌甲患者，共120侧嵌甲进行了手术，术后随访6个月~3年，均取得满意效果。结论：甲基质部分切除并利用甲侧壁皮瓣重建甲沟治疗嵌甲，手术并发症少，复发率低，根治了嵌甲又美容了甲体。

老年心脑血管病患者甲襞微循环改变

心脑血管疾病是严重危害人类健康的疾病之一,近年来其发病率及死亡率急剧增加,因此,探讨、研究该病的有效防治措施并建立一系列有价值的临床监测手段,已日益受到重视。笔者对216名老年人分组进行系统观察,结合田牛氏加权积分法对比评价分析,为临床防治老年常见病提供参考。

正天丸对血瘀型偏头痛血流动力学及多普勒超声(TCD)的影响

目的 :以血流动力学及颅多普勒超声 (TCD)为指标 ,观察正天丸对血瘀型偏头痛的疗效。方法 :对 30例血瘀型偏头痛患者给予正天丸口服治疗 ,治疗 1个月后复查血液流变学指标、甲皱壁微循环积分值、TCD ,并作前后对比观察。结果 :治疗后血液流变学指标、甲皱壁微循环积分值、TCD与治疗前比较均有显著性差异 (P <0 .0 5 )。结论 :正天丸能显著降低血瘀型偏头痛患者全血粘度、血浆粘度及改善甲皱壁循环异常与TCD的变化。

Efficient oxidation of cinnamon oil to natural benzaldehyde over β-cyclodextrin-functionalized MWCNTs

We have designed and prepared β-cyclodextrin （β-CD）-functionalized multi-walled nanotubes （MWCNTs-g-CD） for the oxidation of cinnamon oil to natural benzaldehyde under aqueous condi- tions. The synergistic effect of combining MWCNTs with β-CD led to a remarkable increase in the performance of the MWCNTs-g-CD for the catalytic oxidation of cinnamaldehyde, which exhibited 95% cinnamaldehyde conversion and 85% selectivity to natural benzaldehyde with a short reaction time of 10 rain. The MWCNTs-g-CD also exhibited outstanding recyclability with good stability, showing no discernible decrease in their catalytic activity over five reaction cycles.

热血变装革命

Niji不二周助《网球王子》QQ:17903191九命:这瓶绿色的汁就很醒目啊……是猕猴桃汁还是用颜料调出来的?Niji投稿相片中的一张静物写真,几件小物的组合就很好的表现出了《网王》

爲台港澳患者服務的血栓病专科醫院

山西省運城市台聯血栓病專科醫院,由當地台胞台屬聯誼會創辦,是目前中國大陸首家以台港澳同胞以及他們的親屬為主要服務對象的血栓病專科醫院。 運城古稱河東,是中華民族古代燦爛文化的發祥地之一。現在,每年有成百上千的台港澳同胞到此問醫尋藥。同時,當地的在台人員颇多。身在他鄉的游子時常為家人的旦夕禍福牽暘掛肚。於是,運城市台胞台屬聯誼會發揮當地的醫療技術優勢,組建了這所血栓病專科醫院。

Theoretical Studies on Interaction Between Methanol and Functionalized Single-Walled Carbon Nanotubes

We study the adsorption of a methanol molecule on single-walled carbon nanotubes （SWCNTs） with various diameters and chiral angles by using the density functional theory based calculations. We find that methanol prefers to be adsorbed physically on the exterior surface of chiral nanotubes in comparison to the armchair and zigzag tubes with binding energy of about -2.76 kcal/mol, which is consistent with recent experimental and theoretical investigation results. We further consider the adsorption of methanol on the exterior surface and edge site of functionalized SWCNTs. The obtained results indicate that the binding energy of methanol is significantly increased for adsorption on the sidewall of functionalized nanotubes. It is also found that the adsorption of methanol at the edge site of both functionalized and pristine SWCNT is remarkably different （chemisoption process） in comparison to the exterior sidewall of the tubes. Furthermore, the electronic structures and Mulliken charge population of the considered complexes at their ground state are discussed within the context.

Endoscopic thyroidectomy through anterior chest wall: a report of 28 cases

Objective: To retrospectively evaluate the feasibility and clinical value of endoscopic thyroidectomy through anterior chest wall. Methods: From December 2002 to May 2003, 28 patients with an average of age of 28 years old (rangeing from 20 to 45) were performed endoscopic thyroidectomy through anterior chest wall. The subcutaneous space in the anterior chest wall and the subplatysmal space in the neck were bluntly dissected through a 10-mm incision between the nipples, and CO 2 was insufflated at 6-8 mmHg to create the operative space. Three trocars were inserted in the mammary regions; and dissection of the thyroid, division of the thyroid vessels and parenchyma were performed endoscopically using an ultrasonically activated scalpel. The recurrent laryngeal nerve, the superior laryngeal nerve, and the parathyroid glands were preserved properly. Results: There were 3 mass resections, 17 subtotal lobectomies, 2 total lobectomies, 6 subtotal lobectomies plus contralateral mass resections. The mean operative time was (87.1±26.0) min; the mean blood loss during operation was (47.9±19.6) ml; and the mean postoperative hospital stay was (3.4±0.7) d. The drainage tubes were pulled out at 36-60 h postoperatively. There were no conversions to open surgery or complications. No scars can be found in the neck, and the patients were satisfied with the postoperative appearance. Conclusion: Endoscopic thyroidectomy through anterior chest wall combined with low-pressure subcutaneous CO 2 insufflation is a feasible and safe procedure. It can bring satisfactory cosmetic results. It is believed that endoscopic thyroidectomy by such approach will find a role in the future.

Interaction of Methane with Single-Walled Carbon Nanotubes: Role of Defects,Curvature and Nanotubes Type

We investigate the interaction of single-walled carbon nanotubes （SWCNTs） and methane molecule from the first principles. Adsorption energies are calculated, and methane affinities for the typical semiconducting and metallic nanotubes are compared. We also discuss role of the structural defects and nanotube curvature on the adsorption capability of the SWCNTs. We could observe larger adsorption energies for the metallic CNTs in comparison with the semiconducting CNTs. The obtained results for the zig zag nanotubes with various diameters reveal that the adsorption energy is higher for nanotubes with larger diameters. For defected tubes the adsorption energies are calculated for various configurations such as methane molecule approaching to the defect sites pentagon, hexagon, and heptagon in the tube surface. The results show that the introduce defects have an important contribution to the adsorption mechanism of the methane on SWNTs.

Elevating the flexibility and operability of dividing-wall distillation columns via feed thermal condition adjustment

Because of the complicated interplay between the prefractionator and main distillation column involved,the black-hole problem might occur and prohibit the assignment of four specifications to dividing-wall distillation columns(DWDCs)(e.g., the three main product compositions plus an impurity ratio in the intermediate product), which lowers terribly process flexibility and operability. In this paper, a feed thermal condition adjustment strategy, achieved by the installation of a pre-heater in feed pipeline, is employed to eliminate the black-hole problem and serve to enhance process flexibility and operability. Through the strong influence to the overall mass and energy balance of the DWDC, the feed thermal condition adjustment can alter the interlinking flows between the thermally coupled prefractionator and main distillation column and work effectively to coordinate their relationship. A DWDC separating a benzene, toluene, and o-xylene mixture is chosen to ascertain the feasibility of the philosophy proposed. The static and dynamic studies demonstrate that the feed thermal condition adjustment is an effective way to refine process design and can completely eliminate the black-hole problem and elevate consequently process flexibility and operability.

Numerical analysis of methane migration from floor strata to a longwall face

A two-dimensional numerical mine strata in the vicinity of seam 349 in model of a large （1 000 m× 200 m） section of Iongwall panel 802 in part B of the Murcki Colliery in the Upper Silesian Coal Basin, Poland, was built using the Universal Distinct Element Code UDEC. Longwall extraction of seam 349 with roof caving was simulated in the model over a length of 450 m. Mining-induced changes in displacements, strains and stresses in the mine strata were investigated. Under the assumptions that （1） methane-bearing strata occur 15.6 m beneath seam 349 and include seam 350 and the strata lying beneath, and （2） the methane reservoir pressure is equal to 2 MPa, a fully coupled mechanical hydraulic analysis was performed in which joint conductivity was dependent on the mechanical deformation and, conversely, the mechanical behavior of rock masses was affected by joint fluid pressure. It was shown that migration of methane from coal seams lying beneath the mined seam is possible under conditions where the floor strata deform to a great extent, undergo separation, fracture and break into blocks.

Grafting of Chitosan and Chitosantrimethoxylsilylpropyl Methacrylate on Single Walled Carbon Nanotubes-Synthesis and Characterization

Acid functionalized single walled carbon nanotubes （CNTs） were grafted to chitosan by first reacting the oxidized CNTs with thionyl chloride to form acyl-chlorinated CNTs. This product was subsequently dispersed in chitosan and covalently grafted to form CNT-chitosan. CNT-chitosan was further grafted onto 3-trimethoxysilylpropyl methacrylate by free radical polymerization conditions, to yield CNT-g-chitosan-g-3-trimethoxysilylpropyl methacrylate （TMSPM）, hereafter referred to as CNT-chitosan-3-TMSPM. These composites were characterized by Fourier Transform Infrared Resonance Spectroscopy （FTIR）, carbon-13 nuclear magnetic resonance （13C NMR）, Yhermogravimetric Analysis （TGA）, scanning electron microscopy （SEM） and transmission electron microscopy （TEM）. The composite showed improved thermal stability and could be of great potential use in bone tissue engineering.

Electrochemical Determination of Reduced Glutathione at Multiwalled Carbon Nanotubes/Poly(bromocresol green) Modified Glassy Carbon Electrode

A multiwalled carbon nanotubes/poly(bromocresol green) modfied glassy carbon electrode (MWNTs-PBG/GCE) was used to investigate the electrochemical behavior of reduced glutathione(GSH). GSH showed an irreversible oxidation process on MWNTs-PBG/GCE with an oxidation peak at 0.77 V(vs. SCE) in a phosphate buffer solution(pH=4.0). The kinetic parameters of the electrochemical behavior of GSH on MWNTs-PBG/GCE were calculated. Under the optimal conditions and with the help of amperometric method, a linear relationship was obtained between the oxidation peak current and GSH concentration in the range from 2×10-7 mol/L to 5×10-6 mol/L with the detection limit as 1×10-8 mol/L(signal-to-noise ratio of 3). The current reached the steady-state current within about 5 s. The modified electrode surface had very good reproducibility and stability.

Transparent flexible ZnO/MWCNTs/PBMA ternary nanocomposite film with enhanced mechanical properties

Functional organic-inorganic nanocomposites with high transparency show significant potential application in many fields. However, it is still a great challenge to prepare flexible transparent nanocomposites due to the intrinsic stiffness of the nanoparticles and the poor interaction between nanopartieles and organic matrices. In this work, a transparent ternary nanocomposite film with enhanced mechanical performance is fabricated by two-steps. First, the transparent ternary ZnO/MWCNTs/n-butyl methacrylate （BMA） nanodispersion is prepared by mixing the ZnO/BMA and MWCNTs/BMA dispersions directly. Then, the ternary nanocoposites film is fabricated via in-situ bulk polymerization of the above nanodispersions. As a result, the tensile strength of the ZnO/MWCNTs/poly-n-butyl methacrylate （PBMA） ternary film is enhanced by 42% and the elongation at break is three times that of ZnO/PBMA nanocomposite. The hardness of the film increases from 5B to 1H with 40 wt% ZnO. These results indicate that ZnO and MWCNTs can improve the mechanical properties of the composite significantly. Importantly, the ternary nanocomposite film still remains high transparency and exhibit excellent UV-shielding performance. The as-prepared transparent multifunctional nanocomposite films have promising applications in optical materials and devices, such as optical filters, contact lenses and protection packing.

Low-temperature solution process for preparing flexible transparent carbon nanotube film for use in flexible supercapacitors

Single-walled carbon nanotubes （SWNTs） possess high conductivity, mechanical strength, transparency, and flexibility, and are thus suitable for use in flexible electronics, transparent electrodes, and energy-storage and energy-harvesting applications. However, to exploit these properties, SWNTs must be de-bundled in a surfactant solution to permit processing and use. We report a new method to prepare a SWNT-based transparent conducting film （TCF） using the diazo dye 3,3＇-（[1,1＇-biphenyl]-4,4＇-diyl）bis（4-amino naphthalene-1-sulfonic acid）, commonly known as Congo red （CR）, as a dispersant. Uniform 20-nm-thick TCFs were prepared on rigid glass and flexible polyethylene terephthalate （PET） substrates. The CR-SWNT dispersion and the CR-SWNT TCFs were characterized via UV-Vis-NIR, Raman spectroscopy, FT-IR spectroscopy, transmission electron microscopy （TEM）, field-emission scanning electron microscopy （FE-SEM） and dynamic light scattering （DLS） measurements. The sheet resistivity of the CRSWNT TCF was -34 ±6.6 Ω/□ with a transmittance of 81% at 550 nm, comparable to that of indium tin oxide-based films. Unlike SWNT dispersions prepared in common surfactants, such as sodium dodecyl sulfate （SDS）, sodium cholate （SC）, and Triton X-100, the CR-SWNT dispersion was amenable to forming TCF by drop coating. The CR-SWNT TCF was also very stable, maintaining a very low sheet resistivity even after 1,000 consecutive bending cycles of 8 mm bending radius. Further, manganese dioxide （MnO2） was electrochemically deposited on the CR-SWNT-PET film （MnO2-CR-SWNT-PET）. The as-prepared MnO2- CR-SWNT-PET electrode exhibited high specific capacitance and bendability, demonstrating promise as a candidate electrode material for flexible supercapacitors.