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Possible influence of sulfur content on magnetic aging behaviors of non-oriented electrical steels

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Frontiers of Materials Science 2013年第4期7卷 413-416页

作者： wei-Min MAO ping yang Chang-Rong LI Department of Materials State Key Laboratory of Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China

Six non-oriented steel sheets of similar grade produced by different steel companies were used to analyze the magnetic aging behaviors after aging at 200~C for 48 h. It was observed that tiny S atoms, besides C and N, could also induce certain increase of core loss during aging. Thermodynamic calculation indicated that the nucleation driving force of FeS is much higher than those of Fe3C and Fe4N at low temperature, while S atoms, which tend to segregated around dislocations and boundaries, would diffuse rapidly along the crystalline defects while FeS particles would form. Therefore, higher content of tiny S atoms could increase core loss during service time of non-oriented steel sheets.

关键词： non-oriented electrical steel sulfur diffusion magnetic aging core loss

A Capillary Electrophoresis Detection Scheme for Water-soluble Vitamins Based on Luminol-BrO^- Chemiluminescence System

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Chinese Chemical Letters 2003年第2期14卷 185-187页

作者： wei DENG wei ping yang Zhu Jun ZHANG Hou Jiang ZHOU College of Chemistry and Materials Science Shaanxi Normal UniversityXi'an 710062

A novel chemiluminescence detection scheme has been developed for detecting water-soluble vitamins following capillary electrophoresis (CE) separation. This detection was based on the inhibitory effect of vitamins on the CL reaction between luminol and BrO- in basic aqueous solution. Detection of vitamins was accomplished with a boratebased background electrolyte at pH 9.2. The luminol was used as a component of the separation carrier electrolyte.

关键词： Capillary electrophoresis chemiluminescence vitamins.

Carboxymethyl-β-cyclodextrin for Chiral Separation of Amino Acids Derivatized with Fluorescene-5-isothiocyanate by Capillary Electrophoresis and Laser-induced Fluorescence Detection

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Chinese Chemical Letters 2004年第1期15卷 112-114页

作者： Yu Yun CHEN wei WANG wei ping yang Zhu Jun ZHANG CollegeofChemistryandMaterialsScience ShaanxiNormalUniversityXi＇an710061

A method using carboxymethyl-b-cyclodextrin (CM-b-CD) as selector for chiral separation of amino acids by capillary electrophoresis and laser-induced fluorescence detection was studied. Resolution was better than tha... 详细信息

关键词： Chiral separation amino acids capillary electrophoresis derivatization CM-b-CD.

Improvement on Simultaneous Determination of Cr(III) and Cr(VI) by Capillary Electrophoresis and Chemiluminescence Detection

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Chinese Chemical Letters 2003年第3期14卷 287-289页

作者： wei DENG wei ping yang Zhu Jun ZHANG Xiao Rong LI 中国人民解放军85医院，上海200052

A sensitive method for the simultaneous determination of Cr(III) and Cr(VI) using in-capillary reaction capillary electrophoresis separation and chemiluminescence detection was developed. The procedures were designed as follows: The sample, hydrochloric acid and sodium hydrogen sulfite solution segments were injected sequentially into the capillary. The reaction of Cr(VI) reduced to Cr(III) by HSO3- occurred inside the capillary after applying the running voltage. According to the migration time difference of both Cr(III) ions moving towards to the cathode (detection end), they could be separated and determined. The limits of detection for chromium(III) and chromium(VI) (S/N = 3) were 6.010-13 mol/L (12 zmol) and 1.910-11 mol/L (380 zmol), respectively.

关键词： Chemiluminescence in-capillary reaction chromium capillary electrophoresis.

Determination of metoprolol in rabbit blood using capillary electrophoresis with laser-induced fluorescence detection

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Chinese Chemical Letters 2011年第3期22卷 350-353页

作者： Yu Yun Chen wei ping yang Zhu Jun Zhang College of Environmental Science and Engineering Chang'an University Xi'an 710054 China Education School of Nationalities Shaanxi Normal University Xi'an 710062 China Department of Chemistry Shaanxi Normal University Xi'an 710062 China

This work described a sensitive method for determination of metoprolol in rabbit *** method involved purification by ultrafiltration,derivatization with fluorescein isothiocyanate,determination by capillary electrophoresis（CE） coupled with laser-induced fluorescence（LIF） *** components in plasma including a variety of amino acids and proteins did not interfere with the determination of metoprolol in experimental *** assay had a wide range（2.0-500 ng/mL） of linearity and a detection limit of 0.8 ng/*** intra- and inter-day precisions were satisfactory with relative standard deviation（RSD） less than 10.0%and accuracy within 10.0%.This method was successfully applied to pharmacokinetic study of metoprolol in rabbit blood.

关键词： Capillary electrophoresis Metoprolol Laser-induced fluorescence Ultrafiltration Pharmacokinetic

Primary adenosquamous carcinoma of the esophagus

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World Journal of Gastroenterology 2013年第45期19卷 8382-8390页

作者： Shao-Bin Chen Hong-Rui Weng Geng Wang Jie-Sheng yang wei-ping yang Di-Tian Liu Yu-ping Chen Hao Zhang Department of Thoracic Surgery Cancer Hospital of Shantou University Medical College Department of Integrative Oncology Cancer Hospital of Shantou University Medical College Cancer Research Centre Shantou University Medical College

AIM:To investigate the clinical characteristics,diagnosis,treatment,and prognosis of primary adenosquamous carcinoma(ASC)of the ***:A total of 4015 patients with esophageal carcinoma underwent surgical resection between January 1995 and June 2012 at the Cancer Hospital of Shantou University Medical *** 37 cases,the histological diagnosis was primary *** data were retrospectively analyzed from these 37 patients,who underwent transthoracic esophagectomy with ***χ2or Fisher’s exact test was used to compare the clinicopathological features between patients with ASC and those with squamous cell carcinoma(SCC).The Kaplan-Meier and Log-Rank methods were used to estimate and compare survival rates.A Cox proportional hazard regression model was used to identify independent prognostic ***:Primary esophageal ASC accounted for0.92%of all primary esophageal carcinoma cases(37/4015).The clinical manifestations were identical to those of other types of esophageal *** of the 24patients who underwent preoperative endoscopic biopsy were misdiagnosed with *** median survival time(MST)was 21.0 mo(95%CI:12.6-29.4),and the1-,3-,and 5-year overall survival rates were 67.5%,29.4%,and 22.9%,*** multivariate analysis,only adjuvant radiotherapy(HR=0.317,95%CI:0.114-0.885,P=0.028)was found to be an independent prognostic *** MST for ASC patients was significantly lower than that for SCC patients[21.0 mo(95%CI:12.6-29.4)vs 46.0 mo(95%CI:40.8-51.2),P=0.001].In subgroup analyses,the MST for ASC patients was similar to that for poorly differentiated SCC ***:Primary esophageal ASC is a rare disease that is prone to be misdiagnosed by endoscopic *** prognosis is poorer than esophageal SCC but similar to that for poorly differentiated SCC patients.

关键词： Adenosquamous carcinoma Diagnosis Esophagus Prognosis Treatment

Neurilemmoma of a seminal vesicle

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Chinese Medical Journal 2007年第15期120卷 1383-1384页

作者： HAN ping wei Qiang yang Yu-ru Department of Urology West China Hospital Sichuan University Chengdu 610041 China

Neurilemmoma, also named Schwannoma, is usually a benign tumour composed of Schwann cells. It is commonly located in the retroperitoneum, mediastinum, head and neck, and is rarely seen in the genitourinary organs. Onl... 详细信息

关键词： neurilemmoma seminal vesicle

Pancreatic insulinomas: diagnosis and surgical treatment of 74 patients

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Hepatobiliary & Pancreatic Diseases International 2002年第3期1卷 458-461页

作者： Xi Chen wei-Yao Cai wei-ping yang Hong-wei Li the Department of Surgery, Ruijin Hospital, Shang-hai Second Medical University, Shanghai 200025, China Department of Surgery Ruijin Hospital Shanghai Second Medical University Shanghai 200025 China. gw_vrai@***

Objective: To summarize retrospectively the experi- ence in diagnosis and surgical treatment of pancreatic insulinoma. Method: 74 patients who had been operated on and confirmed pathologically from July 1967 to July 2001 were enrolled. They were 37 men and 37 women, aged 41.91 years on average. Results: In all patients with typical Whipple's triad, the ratio of insulin to glucose was measured over 0.3 for at least one time. 52.70 % of the patients were once misdiagnosed, and only 20.27 % of them were correctly diagnosed in a year after onset of symp- toms. Their average course of the disease was 3.36 years. B-ultrasonography and endoscopic ultrasonog- raphy (EUS) showed a low positive rate for localiza- tion of insulinoma. CT and magnetic resonance ima- ging (MRI) could correctly detected 63.41% and 63.64 % of tumors respectively, in sharp contrast to a localization rate of 90 % for arterial stimulation and venous sampling (ASVS). Single insulinoma was ob- served in 66 patients (89.19 %), multiple insulinoma in 2 (2.70 %), hyperplasia in 4 (5.41%), and malig- nant insulinoma in 2 (2. 70%). Most (85. 29%) of the benign insnlinomas were less than 2 cm in diame- ter. Simple enucleation was the major operative pro- cedure for benign tumors. In 88. 52% of the pa- tients, glycemia increased to normal in 30 minutes after tumor excision, and in the remaining patients within 2 hours. 97. 26% of the patients experienced temporary hyperglycemia but recovered in a week. The major complications of insnlinoma included pan- creatic fistulae (27.27 %) and pancreatitis (5. 19 %). Conclusions: Better recognization of insulinoma and its rational examination are essential to early diagno- sis. CT can be first used for localization, otherwise ASVS is used. Surgery is the major choice for the treatment of insulinoma, but cautions should be taken to pancreatic fistulae after operation.

关键词： insulinoma surgery diagnosis treatment

Long-term results of small-diameter proximal splenorenal venous shunt:A retrospective study

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World Journal of Gastroenterology 2011年第29期17卷 3453-3458页

作者： Hao Chen wei-ping yang Ji-Qi Yan Qin-Yu Li Di Ma Hong-wei Li Department of Surgery Ruijin HospitalShanghai Jiaotong University School of MedicineShanghai 200025China

AIM:To investigate recurrent variceal hemorrhage and long-term survival rates of patients treated with partial proximal splenorenal venous ***:Patients with variceal hemorrhage who were treated with small-diameter proximal splenorenal venous shunt in Ruijin Hospital between 1996 and 2009 were included in this *** diameter was determined before operation using Duplex Doppler ***-operative and long-term results in term of rehemorrhage,encephalopathy and mortality were followed ***:Ninety-eight patients with Child A and B variceal hemorrhage received small-diameter proximal splenorenal venous shunt with a diameter of 7-10 *** operation,the patients’mean free portal pressure (P<0.01)and the flow rate of main portal vein(P< 0.01)decreased significantly compared with that before *** rates of rebleeding and mortality were 6.12%(6 cases)and 2.04%(2 cases),***-one patients were followed up for 7 mo-14 years (median,48.57 mo).Long-term rates of rehemorrhage and encephalopathy were 4.40%(4 cases)and 3.30% (3 cases),*** patients(14.29%)died mainly due to progressive hepatic *** ten-year survival rates were 82.12%and 71.24%,***:Small-diameter proximal splenorenal venous shunt affords protection against variceal rehemorrhage with a low occurrence of encephalopathy in patients with normal liver function.

关键词： Partial portacaval shunt Hemorrhage Esophageal varices Shunt diameter Encephalopathy