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Search Results: 1 - 10 of 48203 matches for " Hou Shi-Min "
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THE PREPARATION AND THE FORMATION PROCESS OF D4 PLASMA POLYMER COMPOSITE MEMBRANES AND THEIR OXYGEN-NITROGEN SEPARATION PROPERTY
D4等离子体聚合物复合膜的制备、形成过程及其氧氮分离性

HOU Xiao-huai,ZHANG Shi-min,SUN Qiu-shi,FU Chang-jun,
后晓淮
,张世民,孙求实,傅常俊

高分子学报 , 1988,
Abstract: 将高分子膜用于气体分离已越来越受到人们的重视.在特定条件下,用等离子体聚合可形成高分子超薄膜,它有高度交联结构,表面平整、致密、无针孔.因此,将它用于气体分离是有希望的.本工作用八甲基环四硅氧烷(简称D_4)作单体,进行等离子体聚合,沉积在聚丙烯多孔底膜上,得到D_4等离子体聚合物复合膜.研究表明,该膜有较好的气体透过性能,其氧气透过速率Jo_2为0.5—2×10~(-5)cm~3(STP)/cm~2·sec·cmHg,氧氮分离系数。αo/N为3.3—3.8,远远高于用经典方法制得的聚有机硅氧烷膜的αo/N2.0.
Surgical treatment of lone atrial fibrillation by mid-sternotomy Maze procedure under standard cardiopulmonary bypass
Yuan, Shi-Min;Sternik, Leonid;
Revista Brasileira de Cirurgia Cardiovascular , 2011, DOI: 10.5935/1678-9741.20110059
Abstract: the aim of article is to give a brief description to the surgical strategies for patients with lone atrial fibrillation without associated cardiac operations, and present the possible indications of on-pump maze procedures through a mid-sternotomy approach.
Cardiac surgery and hypertension: a dangerous association that must be well known
Yuan, Shi-Min;Jing, Hua;
Revista Brasileira de Cirurgia Cardiovascular , 2011, DOI: 10.1590/S0102-76382011000200019
Abstract: it is well-known that hypertension is a very common disease, and severe cerebrovascular accidents might occur if the blood pressure is not properly controlled. however, conditions associated with uncontrolled hypertension may be overlooked, and may become critical and eventually require a surgical intervention on an urgent basis. coronary artery disease, acute aortic syndrome, congenital and valvular heart disease, and arrhythmias are under this topic of discussion. of them, coronary artery disease including myocardial infarction and especially postinfarction myocardial rupture, and aortic dissection are major critical situations that physicians may encounter in clinical practice. the role that hypertension plays in these conditions can be complex, including hemodynamic, electrophysiological and biomolecular factors, where the latter may prevail in the current era. coronary artery disease may be associated with a reduced nitric oxide synthesis. transforming growth factor and matrix metalloproteinases have been observed in relation to aortic syndrome. wnt, p38 and jnk signaling pathway may be involved in the development of ventricular hypertrophy responsible for cardiac arrythmias. various gene phynotypes may present in different congenital heart defects. this article is to present these conditions, and to further discuss the possible etiologies and the potential treatment strategies so as to highlight the relevance at a prognostic level.
Cystic medial necrosis: pathological findings and clinical implications
Yuan, Shi-Min;Jing, Hua;
Revista Brasileira de Cirurgia Cardiovascular , 2011, DOI: 10.1590/S0102-76382011000100019
Abstract: cystic medial necrosis (cmn) is a disorder of large arteries, in particular the aorta, characterized by an accumulation of basophilic ground substance in the media with cyst-like lesions. cmn is known to occur in certain connective tissue diseases such as marfan syndrome, ehlers-danlos syndrome, and annuloaortic ectasia, which usually result from degenerative changes in the aortic wall. the relationships between cmn and congenital heart defects as well as other disorders have been evidenced. the mechanisms are still controversial, even though many molecular studies have been conducted. the aim of the present article is to provide a comprehensive overview of the cmn lesion in terms of pathologic features, clinical implications and etiologies based on molecular research results.
The bicuspid aortic valve and related disorders
Yuan, Shi-Min;Jing, Hua;
Sao Paulo Medical Journal , 2010, DOI: 10.1590/S1516-31802010000500010
Abstract: bicuspid aortic valve (bav) is the most common congenital cardiac malformation, affecting 1-2% of the population, with strong male predominance. individuals may have a normally functioning bav, and may be unaware of its presence and the potential risk of complications. however, they may easily develop aortic valve disorders: either stenotic or regurgitant, or both. today, bav is recognized as a syndrome incorporating aortic valve disorders and aortic wall abnormalities, including aortic dilation, dissection or rupture. congenital or hereditary diseases such as ventricular septal defect, patent ductus arteriosus, coarctation of the aorta, turner's syndrome, marfan's syndrome etc., may frequently be associated with bav. infective endocarditis and occasionally thrombus formation may develop during the lives of bav patients. elevated cholesterol or c-reactive protein may be seen in laboratory findings of these patients. beta-blockers and statins are the possibilities for medical treatment, and aortic valve repair/replacement and ascending aorta replacement are indicated for patients with a severely diseased aortic valve and aorta. rigorous follow-up throughout life is mandatory after bav has been diagnosed. the aim of the present article was to describe the implications of bav and its associated disorders, and to discuss diagnostic and treatment strategies.
Marfan's syndrome: an overview
Yuan, Shi-Min;Jing, Hua;
Sao Paulo Medical Journal , 2010, DOI: 10.1590/S1516-31802010000600009
Abstract: marfan's syndrome is an autosomal dominant condition with an estimated prevalence of one in 10,000 to 20,000 individuals. this rare hereditary connective tissue disorder affects many parts of the body. the diagnosis of marfan's syndrome is established in accordance with a review of the diagnostic criteria, known as the ghent nosology, through a comprehensive assessment largely based on a combination of major and minor clinical manifestations in various organ systems and the family history. aortic root dilation and mitral valve prolapse are the main presentations among the cardiovascular malformations of marfan's syndrome. the pathogenesis of marfan's syndrome has not been fully elucidated. however, fibrillin-1 gene mutations are believed to exert a dominant negative effect. therefore, marfan's syndrome is termed a fibrillinopathy, along with other connective tissue disorders with subtle differences in clinical manifestations. the treatment may include prophylactic β-blockers and angiotensin ii-receptor blockers in order to slow down the dilation of the ascending aorta, and prophylactic aortic surgery. importantly, β-blocker therapy may reduce tgf-β activation, which has been recognized as a contributory factor in marfan's syndrome. the present article aims to provide an overview of this rare hereditary disorder.
A reappraisal of saphenous vein grafting
Yuan Shi-Min,Jing Hua
Annals of Saudi Medicine , 2011,
Abstract: Autologous saphenous vein grafting has been broadly used as a bypass conduit, interposition graft, and patch graft in a variety of operations in cardiac, thoracic, neurovascular, general vascular, vascular access, and urology surgeries, since they are superior to prosthetic veins. Modified saphenous vein grafts (SVG), including spiral and cylindrical grafts, and vein cuffs or patches, are employed in vascular revascularization to satisfy the large size of the receipt vessels or to obtain a better patency. A loop SVG helps flap survival in a muscle flap transfer in plastic and reconstructive surgery. For dialysis or transfusion purposes, a straight or loop arteriovenous fistula created in the forearm or the thigh with an SVG has acceptable patency. The saphenous vein has even been used as a stent cover to minimize the potential complications of standard angioplasty technique. However, the use of saphenous vein grafting is now largely diminished in treating cerebrovascular disorders, superior vena cava syndrome, and visceral revascularization due to the introduction of angioplasty and stenting techniques. The SVG remains the preferable biomaterial in coronary artery bypass, coronary ostioplasty, free flap transfer, and surgical treatment of Peyronie disease. Implications associated with saphenous vein grafting in vascular access surgery for the purpose of dialysis and chemotherapy are considerable. Vascular cuffs and patches have been developed as an important and effective means of enhancing the patency rates of the grafts by linking the synthetic material to the receipt vessel. In addition, saphenous veins can be a cell source for tissue engineering. We review the versatile roles that saphenous vein grafting has played as well as its current status in therapy.
Fabrication of carbon nanotube rings
碳纳米管氧化成环制备研究

Zhang Ping,Li Ping-Jian,Hou Shi-Min,Zhang Qi-Feng,Wu Jin-Lei,
张 萍
,李萍剑,侯士敏,张琦锋,吴锦雷

物理学报 , 2005,
Abstract: 采用化学气相沉积方法制备的碳纳米管,用酸溶液进行弱氧化处理,经适当温度在大气中烧 灼后碳纳米管发生弯曲,在样品中出现大量的环状结构. 利用原子力显微镜、透射电子显微 镜和扫描电子显微镜对典型环直径为300 nm的碳纳米管环进行了表征. 烧灼温度和烧灼时间 对环的结构和产率有重要的影响. 实验数据统计结果表明,烧灼温度在510—530℃区间内 可得到超过40%的碳纳米管环产率,并且烧灼时间延长到120 min有利于提高碳纳米管环的产 率. 在加热情况下,碳纳米管端结合的羧基官能团脱水成酯,导致弯曲的碳纳米管结合成环 .
Chemical Plating of Cobalt on Ni(OH)2 Spheres and the Discharge Performance of Electrodes Made Thereof
球形氢氧化镍表面镀覆钴的结构与电极1 C倍率放电容量

LI Fan,ZHANG Deng-jun,LI Bao-hou,LUO Shi-min,ZHAO Xiao-feng,
李钒
,张登君,李报厚,罗世民,赵晓峰

过程工程学报 , 2002,
Abstract: Cobalt was deposited on spherical nickel hydroxide by electroless plating, using hydrazine or sodium hypophosphite as reductive agent and ammonia or potassium sodium tartrate as complexing agent, respectively. Under the condition of the same amount of Co deposited, phases of product were detected by XRD, the morphology was observed by SEM, and its electrode discharge (1 C rate) capacity was determined. It is found that Co-coating can increase the discharge capacity by 11% to 32%.
Kinetics of Chemically Plating Nickel on the Surface of Hexagonal Boron Nitride Micro-particles
六方BN微颗粒表面化学镀镍的动力学

LI Fan,ZHAO Xiao-feng,ZHANG Deng-jun,LI Bao-hou,LUO Shi-min,
李钒,赵晓峰,张登君,李报厚,罗世民

过程工程学报 , 2003,
Abstract: The kinetic research for hydrazine reduction chemical plating of nickel on the surface of hexagonal boron nitride particles with the average diameter of 104 mm has been carried out in this work. Effects of reaction temperature and addition of surfactant SDS on nickel deposition were studied and discussed. SEM morphology observed and EDS analysis at different depositing time verified the kinetics of nickel deposition.
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