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Influence of Boron Content in Iron Oxide on Performance of Mn-Zn Ferrites

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Journal of Iron and Steel Research International 2010年第2期17卷 59-62页

作者： yu Cheng-feng li yu-guang XU Hui-yu GAO Jin-sheng College of Resource and Environmental Engineering East China University of Science and Technology Shanghai 200237 China Technology and Quanlity Management Department Baoshan Iron and Steel Co Ltd Shanghai 201900 China Shanghai Baosteel Tiantong Magneitic Materials Co Ltd Shanghai 201900 China

The ferrites of PC30 （Mn-Zn ferrites） were prepared by using a dry processing route. The effect of Mn-Zn ferrites doped with H3BO3 was investigated on the basis of microstructure analysis. The results of the samples doped with H3BO3 less than 5 × 10^-5 showed that the doping had no significant effect on power loss, initial permeability, fine grain microstructure, and density of Mn-Zn ferrites. With the further increase in H3BO3 doping （up to 1 × 10 ^-4 ）, the microstructure of Mn-Zn ferrites is in the critical state between fine grain and ＂sandwich＂, and the initial permeability and density of Mn-Zn ferrites begin falling quickly; the increased H3BO3 doping also results in deteriorated power loss properties. Thus, the control of the boron content in iron oxide is of utmost importance for the quality of Mn-Zn ferrites in producing process.

关键词： iron oxide Mn-Zn ferrite boron content initial permeability

In vitro Degradation and Biocompatibility of Ca-P Coated Magnesium Alloy

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Chemical Research in Chinese Universities 2013年第2期29卷 285-289页

作者： XIAO Xing ZHU Qing-san SU Ying-chao li guang-yu The First Hospital of Jilin University Changchun 130021 P. R. China College of Materials Science and Engineering Jilin University Changchun 130022 P. R. China

Calcium-phosphate compounds（Ca-P） coating was prepared on an Mg-A1 alloy（AZ60）. Biodegradation of Ca-P coated magnesium alloy was evaluated in simulated body fluid（SBF） by examining the changes in magnesium ion concentration and pH value, which indicated that the Ca-P coating on magnesium alloy strongly affected the cor- rosion of magnesium alloy. Osteoblast MC3T3-E1 cells were utilized to investigate the cellular eytocompatibility. The cytocompatibility was measured by carrying out a series of tests, such as cholecystokinin-octapeptide（CCK-8） test, alkaline phosphatase activity（ALP） test, cellular morphology of hematoxylin-eosin（HE） staining and the induc- tion of apoptosis. It was found that the cell function showed better in the Ca-P coated Mg-alloy extract than in the uncoated magnesium alloy extract. In summary, the results indicate that the Ca-P coating can improve the corrosion resistance of magnesium alloy and elevate cellular proliferation and differentiation of osteoblast MC3T3-E1 cells.

关键词： Ca-P coating Magnesium alloy In vitro

Functional paragangliomas of the urinary bladder:a report of 9 cases

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Chinese Journal of Cancer 2010年第8期29卷 729-734页

作者： Jian-Hua Deng Han-Zhong li yu-Shi Zhang guang-Hua liu Department of Urology Peking Union Medical College Hospital Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100730 P. R. China

Background and Objective: Functional paraganglioma of the urinary bladder (FPUB) is a rare tumor. Misdiagnosis of FPUB before operation can lead to serious intraoperative consequences. In this article, we reported our experience in preoperative diagnosis and surgical treatment of FPUB. Methods: Clinical data of nine patients with FPUB treated between June 1985 and January 2009 at Peking Union Medical College Hospital were analyzed. Results: All patients underwent urinary catecholamine (CA) detection, B-ultrasound, CT and/or MRI scan; 5 underwent nailfola microcirculation inspection; 4 underwent 131I-metaiodobenzyl guanidine (MIBG) detection; and 6 underwent 111In-DTPA-Octreotide (OCT) scintiscan. According to the UICC bladder tumor classification, 5 patients had T2, 3 had T3, and 1 had T4 disease. All patients underwent surgical treatment, and 1 received 131I-MIBG therapy. All patients had paroxysmal hypertension and palpitation and six had cold sweat, headache, and dizziness after emphatic urination. The definitive diagnosis was made by histopathologic examination of the removed tumors and was confirmed in 7 cases by the immunohistochemical staining of chromogranin A, Ki-67 and S100 protein. The tumor consisted of discrete aggregates of zellballen cells separated by a network of vascular channels. One patient had metastases in the pelvic lymph nodes, liver and colon. Follow-up ranged from 7 to 289 months (mean, 127.2 ± 34.2). Six of the nine cases reported here were found in the usual locations. One patient had multiple tumors. The catecholamine level was elevated under basal conditions in 8 patients and during endoscopic resection of the tumor in 1 patient; it returned to normal after surgery in 8 patients. Three patients had recurrence and 1 had metastasis following surgery. Conclusions: Early preoperative diagnosis of FPUB is difficult, but it should be suspected in patients with typical tetrad symptoms: headache and micturition syncope, sweating, palpitation an

关键词：膀胱肿瘤手术治疗 S100蛋白儿茶酚胺病理检查临床资料 DTPA 手术切除

FORCED-AIR WARMING AND FLUID WARMING MINIMIZE CORE HYPOTHERMIA DURING ABDOMINAL SURGERY

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Chinese Medical Sciences Journal 2005年第4期20卷 261-264,页

作者： Jing Zhao Ai-lun Luo li Xu yu-guang Huang Department of Anesthesiology Peking Union Medical College Hospital Chinese Academy of Medical Sciences ＆ Peking Union Medical College Beijing 100730

Objective To evaluate the effect of intraoperative combined forced-air warming and fluid warming system on patient＇s core temperature, blood loss, transfusion demand, extubation time, and incidence of postoperative shivering. Mothods Forty patients with American Society of Anesthesiologists physical status I and II, aged 18-70 years, scheduled for elective abdominal surgery were randomly assigned to receive intraoperative warming from a forced-air blanket and fluid warming system or conventional cotton blanket, 20 in each group. The core temperature was recorded every 20 minutes during the operation, as well as the blood loss, blood transfusion, extubation time, and incidence of postoperative shivering. Results The core temperature at the end of the surgery in the warming group was significantly different from that in the control group （36.4±0.4℃ vs. 35.3±0.5℃, P〈0.001）. Application of intraoperative warming significantly shortened the time between the end of the surgery and extubation （P〈0.01）. Postoperative shivering occurred in 30% of the patients in the control group compared to no patient in the warming group （P 〈0.01）. Conclusion Active warming with air-forced blanket and fluid warming system provides sufficient heat to prevent hypothermia during abdominal surgery.

关键词： forced-air warming fluid warming core temperature

Microstructure and Performances of Nanocrystalline Zinc-nickel Alloy Coatings

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材料热处理学报 2004年第05B期25卷 1275-1278页

作者： liguang-yu liANJian-she NIUli-yuan JIANGZhong-hao TheKeyLabofAutomobileMaterials MinistryofEducation.ChinaCollegeofMaterialsSc＇ienceandEngineeringJilinUniversityNantingCampusChangchun130025.China

Nanocrystalline zinc-nickel alloy coatings were deposited from an alkaline zincate bath contained an organic additive that can reduce polarization and a complexing agent. SEM and TEM observations and XRD analysis were performed to examine the microstructure and phase composition of the coatings. The nickel content in deposits is 12.0-14.7% and the coating is consisted of single nanocrystalline y-phase structure (Ni5Zn2i), with grain average grain size about 15nm. The nanocrystalline zinc-nickel alloy coatings have better corrosion resistance, less bnttleness and higher microhardness than the conventional zinc coatings.

关键词：显微结构纳米结晶锌镍合金 SEM TEM

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一次套钻确定三维地应力的新型钻孔变形计

岩土力学 2006年第5期27卷 816-822页

作者：胡斌章光李光煜中国科学院武汉岩土力学研究所武汉理工大学资源与环境工程学院武汉430070

基于岩体初始地应力测量的套钻应力解除方法,在36-2型钻孔变形计的基础上增加8个轴向变形测量装置,优化设计加工成12分量新型钻孔变形计。该变形计具有8个轴向变形测量元件和4个径向变形测量元件。试验室内元件标定的结果表明,每个测量... 详细信息

基于岩体初始地应力测量的套钻应力解除方法,在36-2型钻孔变形计的基础上增加8个轴向变形测量装置,优化设计加工成12分量新型钻孔变形计。该变形计具有8个轴向变形测量元件和4个径向变形测量元件。试验室内元件标定的结果表明,每个测量元件的分辨率可达0.0001mm,精度达到2‰;多项室内整体标定试验表明,该变形计应力测量稳定性和可靠性较好,分辨率可达0.028MPa(当E=30GPa时),实测误差小于10%;在利用设计出的专用金刚石钻头钻取的钻孔中,安装该变形计,只需要一次套钻应力解除试验就可以确定测点部位的三维地应力状态。该地应力测试设备和方法解决了传统的利用3个钻孔套钻解除确定三维地应力的弊端,并可进行深孔测试。具有操作方便、精度高、可靠性好的特点。

关键词：套钻钻孔变形计三维地应力

Phase I Study to Determine MTD of Docetaxel and Cisplatin with Concurrent Radiation Therapy for Stage Ⅲ Non-Small Cell Lung Cancer

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Chinese Journal of Cancer Research 2011年第2期23卷 129-133页

作者： You-quan li An-hui Shi Fu-hai li Rong yu guang-ying Zhu Key Laboratory of Carcinogenesis and Translational Research （Ministry of Education） Department of Radiation Oncology Peking University School of Oncology Beijing Cancer Hospital ＆ Institute Beijing 100142 China

Objective： To evaluate the maximum tolerated dose （MTD） of docetaxel （DCT） and cisplatin （DDP） concurrently with three dimensional （3D） conformal radiotherapy or IMRT for patients with locally advanced non-small cell lung cancer （stage IIIa and IIIb） after 2–4 cycles of induction chemotherapy. Methods： Fourteen patients with histological/cytological proven stage III non–small-cell lung cancer were eligible. 3D or IMRT radiotherapy （60-70Gy in 30-35 fractions, 6-7weeks, 2 Gy/fraction） was delivered concurrently with cisplatin and docetaxel, 2 cycles during concurrent chemoradiotherapy （CCRT）. The level I dosage was composed of 56 mg/m2 DCT, on day 1 and 28mg/m2 DDP, on day 1 and day 2. The level II was composed of 60 mg/m2 DCT, on day 1 and 30 mg/ m2 DDP, on day 1 and day 2. The level III was composed of 64 mg/m2 DCT, on day 1 and 32 mg/ m2 DDP, on day 1 and day 2. Results： Fourteen patients were allocated and finished concurrent chemoradiotherapy. The dose-limiting neutropenia was at the dose Level III （64 mg/m2） and occurred in 2 of 5 patients. No dose limiting non-hematologic or hematologic toxicity occurred in the other patients. Conclusions： Patients with locally advanced non-small cell lung cancer may tolerate 60mg/m2 docetaxel and 60mg/m2 cisplatin for 2 cycles during concurrent radiotherapy after 2-3 cycles of induction chemotherapy.

关键词： Non–small-cell lung cancer Concurrent chemoradiotherapy Cisplatin docetaxel Toxicity

Direct Electroless Nickel Plating on AZ91D Magnesium Alloy from a Sulfate Solution and its Deposition Mechanism

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材料热处理学报 2004年第05B期25卷 1098-1101页

作者： GUChang-dong liANJian-she liguang-yu NIUli-yuan JIANGZhong-hao TheKeyLabofAutomobileMaterials MinistryofEducationChinaCollegeofMaterialsScienceandEngineeringJilinUniversityNanlingCampusChangchun130025China

A bath of electroless plating Ni on the AZ91D magnesium alloy, containing sulfate nickel, was given in this paper. The nucleation mechanism of Ni-P deposits on the AZ91D magnesium alloy was studied by using XRD and SEM. The electroless Ni-P deposits were preferentially nucleated on the (Mg17Al12) phase and extended to the primary and eutectic a phases of the AZ91D magnesium alloy.

关键词：非电解淀积 AZ91D 镁合金硫酸盐溶液

Enhancement of Microcalcifications Based on Fractal Techniques in Mammograms

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Chinese Journal of Biomedical Engineering(English Edition) 2010年第3期19卷 103-108,138页

作者： SONG li ZHANG guang-yu LU Wen JIAO Qing Department of Biomedical Engineering College of Radiology Taishan Medical University Tai＇ an 271016 China

Microcalcification clusters in mammograms are an important early sign of breast cancer. The enhancement of mieroealcifications in mammograms is one of the most important preprocessing techniques for the extraction of cluster mierocalcifications. In this paper, we present a novel method for the enhancement of microcalcifications. Firstly, the initial microcaleification edges were extracted by using kirsch edge operator, and the diseontinouse edges were linked by employing fi＇aetal teehnique, Then, the continuous closed edges of microcalcifications were filled by using seed filling algorithm. The pixel values of the filled region were replaced by the corresponding pixel values in the original image. Finally, the enhancement of microcalcifications in mammograms was achieved by adding the filled image to the original image. We evaluated the performance of our algorithm by using 50 regions of interesting （ROIs） with microcalcification clusters from DDSM database. The experiment results demonstrate that our CAD system can give better enhancement effect compared with other methods.

关键词： enhancement microcalcification cluster kirsch edge detection fractaltechnique mammogram