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Search Results: 1 - 10 of 125267 matches for " ZHANG Shu-Ren "
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Revision of Kobresia (Cyperaceae) in Xizang (Tibet)
西藏嵩草属(莎草科)的修订

ZHANG Shu-Ren,
张树仁

植物分类学报 , 2004,
Abstract: The genus Kobresia in Xizang (Tibet) is revised taxonomically on the basis of both herbarium and field observations. Thirty_six species and one subspecies are recognized. The names of six taxa are corrected, and the six correct names are K. esenbeckii, K. fissiglumis, K. gammiei, K. littledalei, K. myosuroides ssp. bistaminata and K. vaginosa. Thirteen previously recognised taxa, K. angusta, K. cercostachys var. capillacea, K. clarkeana, K. curticeps var. gyirongensis, K. deasyi, K. glaucifolia, K. hookeri, K. nudicarpa, K. prainii var. elliptica, K. seticulmis, K. stenocarpa, K. stenocarpa var. simplex and K. williamsii, are treated as synonyms. K. prainii var. elliptica, K. glaucifolia and K. stenocarpa var. simplex are new synonyms. K. handel_mazzettii is a new record to Xizang. Two species newly published, K. pseuduncinoides and K. woodii, should be added to the flora of Xizang. A new key to species and subspecies, and the information of the distribution sites of each taxon in Xizang are given.
Revision of Kobresia (Cyperaceae) in Xizang (Tibet)
西藏嵩草属(莎草科)的修订

ZHANG Shu-Ren,
张树仁

中国科学院研究生院学报 , 2004,
Abstract: The genus Kobresia in Xizang (Tibet) is revised taxonomically on the basis of both herbarium and field observations. Thirty-six species and one subspecies are recognized. The names of six taxa are corrected, and the six correct names are K. esenbeckii, K. fissiglumis, K. gammiei, K. littledalei, K. myosuroides ssp. bistaminata and K. vaginosa. Thirteen previously recognised taxa, K. angusta, K. cercostachys var. capillacea, K. clarkeana, K. curticeps var. gyirongensis, K. deasyi, K. glaucifolia, K. hookeri, K. nudicarpa, K. prainii var. elliptica, K. seticulmis, K. stenocarpa, K. stenocarpa var. simplex and K. williamsii, are treated as synonyms. K. prainii var. elliptica, K. glaucifolia and K. stenocarpa var. simplex are new synonyms. K. handel-mazzettii is a new record to Xizang. Two species newly published, K. pseuduncinoides and K. woodii, should be added to the flora of Xizang. A new key to species and subspecies, and the information of the distribution sites of each taxon in Xizang are given.
Classification of Kobresia fragilis C. B. Clarke (Cyperaceae) and related taxa
囊状嵩草(莎草科)及相关类群的分类

ZHANG Shu-Ren,
张树仁

中国科学院研究生院学报 , 2002,
Abstract: The classification of Kobresia fragilis C. B. Clarke and related taxa were studied based on gross morphology and nutlet epidermal micromorphology. About 13 names have been involved in the species group. They could not be clearly defined using the morphological characters employed by previous authors. Thus, more than 200 sheets of 89 specimens of related taxa were studied thorough- ly, and the taxonomic significance of morpbological characters was re-evaluated. In order to further understand the classification of K. fragilis and its allies, micromorphology of nutlet epidermis of these taxa was observed under scanning electron microscope. Based on the results, K. curvata C. B. Clarke and K. fragilis were recognized. Other names were treated as synonymies of K. fragi- lis. K. clarkeana (Kükenthal) Kükenthal, K. clarkeana var. megalantha Kükenthal and K. curticeps (C. B. Clarke) Kükenthal var. gyirongensis Y. C. Yang were reduced to new synony- mies of K. fragilis. K. curvata was distinct from K. fragilis on both morphological and micromor- phological basis. One specimen of K. fragilis collected from Luqu, Gansu, China, represents anew distribution record of this species in Gansu.
Application of Soehendra stent retriever in patients with pancreatic or bile duct stricture
Ying-chun ZHANG,Shu-ren MA,Ning ZHANG,Zhuo YANG
Medical Journal of Chinese People's Liberation Army , 2013,
Abstract: Objective  To evaluate the efficacy of Soehendra stent retriever as used as a dilator for the patients with high grade stricture of pancreatic or bile duct. Methods  Forty-eight patients, who underwent endoscopic retrograde cholangiopancreatography (ERCP) from Jan. 2010 to Oct. 2012 in Endoscopy Department of General Hospital of Shenyang command, were found to have pancreatic or bile duct stricture. Dilation was then attempted using a dilating sound. Once the stricture could not be traversed, the Stent Retriever was inserted over the sound to dilate the stricture. Results  A total of 554 patients were diagnosed to suffer from pancreatic or bile duct stricture with the aid of ERCP. Among them dilatation of stricture with catheter failed in 48 cases (8.7%) and Soehendra stent retriever was then used for dilatation. Of the 48 cases, ERCP revealed common bile duct stricture in 8 patients, common hepatic duct stricture in 6 patients, porta hepatis stricture in 5 patients, stricture at neck of pancreas stricture in 18, stricture at body of pancreas in 4, stoma stricture after liver transplant in 4, and occlusion of metallic stent in 3 patients. For these cases, Soehendra stent retriever was used to dilate the stricture prior to setting stent or endoscopic nasobiliary drainage (ENBD) with a success rate of 100%. No related complication was found. Conclusion  Pancreatic and bile duct stricture can be dilated successfully with the Soehendra stent retriever. The procedure is of low risk and highly effective.
Effects of Sintering Techniques on the Microstructure and Performance of High Purity Beryllium Oxide Ceramics
ZHONG Chao-Wei,LIANG Jian,ZHANG Shu-Ren,ZHANG Shao-Hua,LI B
无机材料学报 , 2010, DOI: 10.3724/sp.j.1077.2010.00415
Abstract: The effects of traditional, multistep and two-step sintering technique on the microstructure and performance of high purity beryllium oxide ceramics were investigated. It was found that the grain size of 99BeO ceramics could be controlled by the multistep sintering method, and the thermal conductivity could be elevated via two-step sintering method. Moreover, the technique parameters of the twostep sintering method, such as the highest sintering temperature (T1), the final sintering temperature (T2) and holding time (t),were studied in detail. The results show that under the condition of T1=1630℃, T2=1550℃ and t=4h, 99 BeO oxide ceramics owing fine grain and compact structure were obtained with the thermal conductivity of 308W/(m·K), and the density of 2.95g/cm3.
Multiple Non-linear Regression Analysis for Complex Doping of X7R MLCC Ceramics
环保型多重掺杂X7R瓷料的多元非线性回归分析

ZHOU Xiao-Hua,ZHANG Shu-Ren,TANG Bin,LI Bo,
周晓华

无机材料学报 , 2006,
Abstract: 通过引入自制复合氧化物掺杂剂,应用多元非线性回归分析方法,建立了多元非线性回归数学模型y=b0+∑bixi+∑biixi2+∑biiixi3,确立了环保型多重掺杂X7R多层陶瓷电容器(MLCC)瓷料中各种掺杂剂的用量对介电常数及电容量温度变化率(△C/C25℃)的多元非线性回归方程,并进一步解释了部分掺杂剂的改性机理.回归方程表明,介电常数随 Nb、Ce掺杂量的增加而降低,这与当前较为成熟理论“壳-芯”结构模型完全吻合.最后通过回归方程优化瓷料配方,研制了环保型X7R MLCC瓷料系统.在空气中于1140℃下烧成的BaTiO3陶瓷材料的主要性能指标达到: ε298K=2900±50,tgδ≤1.0%,ρ≥1011Ω·cm, △C/C25℃(-55℃~+125℃)≤±15%.
Effect of Sintering Atmosphere on Dielectric Properties of Er-Mg and Er-Mn Doped BaTiO3
烧结气氛对 Er-Mg和 Er-Mn掺杂 BaTiO3陶瓷介电性能的影响

LI Bo,ZHANG Shu-Ren,WANG Sheng,
李波
,张树人,王升

无机材料学报 , 2007,
Abstract: Er-Mg and Er-Mn doped BaTiO3 systems were prepared by solid state reaction and the effects of sintering atmosphere on their microstructures and electrical properties were researched. XRD indicates that both samples sintered in different atmospheres have pseudocubic structure. For both specimens, the solubility limit of Er in BaTiO3 is about 3.0mol%- 4.0mo1%, however the reducing atmosphere can suppress the solid solubility of acceptors such as Er, which lead to the formation of pyrochlore-type Er2Ti2OT. SEM shows that Mn ions promote grain growth of Er2Ti207 secondary phase, but contrarily Mg ions inhibit it. The results suggest that due to the effect of various sintering atmosphere, the solid solubility change of acceptors can affect the core/shell volume ratio in the grains, as well as the valence variety of Mn ions can shift the Curie temperature. Thus the capacitance-temperature characteristics are dramatically improved and two kinds of dielectrics sintered under the proper conditions can meet X8R specification.
Notes on Carex subgen. Vignea (Cyperaceae) from China
中国薹草属二柱薹草亚属(莎草科)增补

ZHANG Shu-Ren,LIANG Song-Yun,
张树仁
,梁松筠

中国科学院研究生院学报 , 2004,
Abstract: 报道了发现于新疆布尔津的一个中国新记录种——卵形薹草Carex leporina L.,提供了其形态描述和线描图。该种因具有雌雄顺序的小穗和鳞片状的苞片而与卵果薹草C. maackii Maxim.近缘,但花序较短、小穗较少而与后者不同。这两种植物隶属于薹草属二柱薹草亚属卵形薹草组subgen. Vignea sect. Ovales。
Clinical application of sodium hyaluronate,levarterenol and indicarmine solution in endoscopic submucosal dissection
Fei GAO,Shu-ren MA,Ning ZHANG,Zhao-jie GONG
Medical Journal of Chinese People's Liberation Army , 2011,
Abstract: Objective To assess the clinical value of sodium hyaluronate,levarterenol and indicarmine solution used in endoscopic submucosal dissection(ESD).Methods Sixteen patients were involved in present study who were diagnosed as precancerous lesion or submucosal tumor in digestive tract by chromoendoscopy and endoscopic ultrasonography from Nov,2010 to Feb,2011 at General Hospital of Shenyang Command.The injected solution was mixed with 0.2% indicarmine 10ml,levarterenol 10mg,sodium hyaluronate 20mg,and 0.9% normal saline 200ml.The liquid pad was formed under the submucosal layer by the injection of the mixture.Hybrid knife was employed to perform the injection,cutting and coagulation with no interruption during the procedure of ESD.Satisfactory degree was assessed,and the total solution volume,success rate,bleeding rate,perforation rate,operation duration,and length of stay in hospital were recorded.The recurrence and healing condition were observed at following-up.Results The length of lesion was 0.8~4.5cm with mean of 2.2cm.The operation duration was 45~240 min with an mean time of 95.4 min.The mean dosage of the mixed solution for submucosal injection was 102.4ml.Success rate of endoscopic submucosal dissection was 87.5%.The satisfactory degree was high.Intractable bleeding occurred in 2 cases with lateral spreading tumor(LST) during the procedure,but it was controlled after high temperature coagulation without producing perforation.The dissection surface was covered by aluminum phosphate gel in all cases,and metal clips were applied in some cases for closure.The mean length of stay in hospital after ESD was 3.8 days.Conclusions The mixture of sodium hyaluronate,levarterenol,indicarmine and normal saline,when used for submucosal injection in ESD,is safe and satisfactory.
Endoscopic transpapillary drainage of infected pancreatic pseudocyst complicating pancreatitis,a report of 18 cases
Zhi-feng ZHAO,Shu-ren MA,Ning ZHANG,Zhuo YANG
Medical Journal of Chinese People's Liberation Army , 2011,
Abstract: Objective To evaluate the effectiveness of endoscopic transpapillary drainage in the treatment of infected pancreatic pseudocyst complicating pancreatitis.Methods The data of 18 cases of pancreatitis with infected pancreatic pseudocyst having undergone endoscopic transpapillary drainage from Jan.2004 to Jun.2006 were retrospectively analyzed.All patients were diagnosed and then checked postoperatively by endoscopic retrograde cholangiopancreatography(ERCP) and CT.All patients were treated by endoscopic sphincterectomy(EST),endoscopic pancreatic sphincterectomy(EPS),or endoscopic nose-pancreatic pseudocysts drainage(ENPPD).Extraction of pancreatic duct stones and dilatation of pancreatic duct stricture were performed selectively.Results During the treatment,removal of pancreatic stones was performed in 6 cases.Pancreatic duct dilatation was performed in 9 cases with pancreatic duct narrowing,and 8 cases received pancreatic stents drainage.Postoperatively,clinical symptoms were evidently alleviated in 18 patients,and with a large amount of purulent pancreatic fluid drained.Symptom of infection,including abdominal pain and fever,were within 48 hours after drainage,and were controlled within 1 week.Pancreatic pseudocysts disappeared in 16 cases,and conspicuously shrank in 2 patients.Pancreatic function recovered gradually following endoscopic transpapillary nose-pancreatic pseudocyst drainage.Conclusions In the treatment of pancreatitis with infected pancreatic pseudocyst,endoscopic transpapillary nose-pancreatic pseudocysts drainage is a preferred method for its safety,less trauma,lower expenditure,convenient and conspicuous curative effect.
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