检索结果-南通市图书馆

Mesenteric panniculitis: Various presentations and treatment regimens

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2009年第30期15卷 3827-3830页

作者： Iyad Issa hassan baydoun Department of Gastroenterology & Hepatology Rafik Hariri University HospitalBeirut 2034-7304Lebanon

Mesenteric panniculitis is a rare, benign and chronic f ibrosing inflammatory disease that affects the adipose tissue of the mesentery of the small intestine and colon. The specific etiology of the disease is unknown. The diagnosis is suggested by computed tomography and is usually confirmed by surgical biopsies. Treatment is empirical and based on a few selected drugs. Surgical resection is sometimes attempted for def initive therapy, although the surgical approach is often limited. We report two cases of mesenteric panniculitis with two different presentations and subsequently varying treatment regimens. Adequate response was obtained in both patients. We present details of these cases as well as a literature review to compare various presentations, etiologies and potential treatment modalities.

关键词： Mesentery Panniculitis Colon Computedtomography Fibrosis Inflammation

Localisation Inverse Problem of Absorbing Laplacian Transport

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Modern Physics 2013年第5期4卷 572-578页

作者： Ibrahim baydoun école Centrale Paris Laboratoire de MSS-MAT Grande Voie des Vignes Chatenay-Malabry Cedex France

We study the localisation inverse problem corresponding to Laplacian transport of absorbing cell. Our main goal is to find sufficient Dirichelet-to-Neumann conditions insuring that this inverse problem is uniquely soluble. In this paper, we show that the conformal mapping technique is adopted to this type of problem in the two dimensional case.

关键词： Laplacian Transport Dirichlet-to-Neumann Operators Inverse Problem Conformal Mapping

Localisation Inverse Problem and Dirichlet-to-Neumann Operator for Absorbing Laplacian Transport

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Modern Physics 2013年第6期4卷 772-779页

作者： Ibrahim baydoun école centrale Paris Laboratoire de MSS-MAT F-92295 Grande voie des Vignes Chatenay-Malabry cedex France

We study Laplacian transport by the Dirichlet-to-Neumann formalism in isotropic media (γ = I). Our main results concern the solution of the localisation inverse problem of absorbing domains and its relative Dirichlet-to-Neumann operator . In this paper, we define explicitly operator , and we show that Green-Ostrogradski theorem is adopted to this type of problem in three dimensional case.

关键词： Absorbing Laplacian Transport Dirichlet-to-Neumann Operators Inverse Problem

Aspirin Induces Apoptosis in Mesenchymal Stem Cells Requring Wnt/β-catenin Pathway

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Aspirin Induces Apoptosis in Mesenchymal Stem Cells Requring...

Challenging the Expiry Dates of Two Mycotoxins Standards: Afla and Ochra A

2008年全国生物化学与分子生物学学术大会

作者： baydoun Anwar R Research Center for Cardiovascular Regenerative Medicine the Ministry of Health of ChinaCardiovascular Institute and Fu Wai HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina

Mesenchymal stem cells(MSCs)have been reported to improve heart function when injected into the myocardium after an *** have previously observed that aspirin,a standard medication for the primary and secondary prevention of cardiovascular diseases,inhibits MSCs proliferation and here we demonstrate that aspirin induces MSCs *** induced apoptotic morphological changes,cytochrome c release from

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Journal of Materials Science and Chemical Engineering 2017年第8期5卷 59-68页

作者： A. Aridi L. baydoun C. M. S. T. Sukhn Chemistry Department Faculty of Sciences II Lebanese University Fanar Lebanon Environment Core Laboratory Pathology & Laboratory Medicine Department Faculty of Medicine American University of Beirut Hamra Beirut Lebanon

Objectives: To challenge the expiry dates of low concentration high purity mycotoxins standards. Literature Review: Aflatoxins (AFs) and Ochratoxin A (OTA) are persistent mycotoxins with adverse effects on humans. Mycotoxins standards are purchased to determine mycotoxin concentrations in food and may be stocked in some laboratories beyond expiry dates causing laboratories financial losses. Methods: Certified mycotoxins standards were purchased over the years from the same supplier at times and at other times from two different suppliers for quality control purposes. For AFs, six chromatographic runs for each of the mycotoxins standards were done to compare the difference among these standards having the following expiry dates (2008, 2012, 2013 and 2018). AFs standards purchased/obtained from two different suppliers in 2016 and expiring in 2018 were also compared. For OTA, the difference of concentration obtained between two years (2010 and 2018) was tested. All samples were run on a HPLC equipped with a fluorescence detector. Linearity of calibration curves and the points of lowest detection were determined for AFs components and for OTA from the unexpired mycotoxins standards. Results: At a 0.05 significance level and using non parametric tests, the statistical test revealed a p of 0.166, 0.153, 0.358 and 0.03 for B1, G1, B2 and G2 respectively among years for standards from same supplier and 0.037, 0.109, 0.182 and 0.182 for B1, G1, B2 and G2 respectively for unexpired standards from two different suppliers. For OTA, a p of 0.109 was obtained for standards of different expiry dates purchased from different suppliers. Conclusion: High purity low concentration mycotoxin standards purchased a decade ago (i.e. expired) did not differ from those purchased this current year (still valid). Hence, the expiry date can be renewed reducing the laboratories expenses. Manufacturers are urged to reconsider the expiry dates.

关键词： Mycotoxins Aflatoxins Ochratoxin A G1 G2 B1 B2 OTA Persistent Ther-mostable Standards Certified Low Concentration High Purity Challenge Expiry Date Years HPLC Manufacturer Suppliers

Identification of EDTA-Soluble Polysaccharides from Pea Epicotyl Cell Walls and Their Interaction with Xyloglucan

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American Journal of Plant Sciences 2011年第2期2卷 148-155页

作者： Elias A.-H. baydoun Oula C. Mansour Sandra E. Rizk Christopher T. Brett Department of Biology American University of Beirut Department of Natural Sciences Lebanese American University

Nascent pectin and glucuronoxylan were prepared from membrane-bound enzymes obtained from pea epicotyls. They had previously been shown to exhibit a protein- and pH-dependent pattern of binding to cell wall ghosts and to xy-loglucan extracted from cell walls prepared from pea epicotyls;maximum binding required a pH of 3-4, and the pres-ence of cell wall proteins, namely assemblins. To determine whether wall polysaccharides deposited in cell walls be-have in the same manner as nascent polymers, radioactively labeled EDTA-soluble polymers were prepared from newly-deposited pea epicotyl cell walls. Different enzyme treatments followed by column chromatography, in addition to complete acid hydrolysis followed by paper and thin layer chromatography, indicated the presence of pectin, to-gether with smaller amounts of glucuronoxylan, in this EDTA-soluble extract. These radioactively labeled polysaccha-rides were found to bind to cell wall ghosts and to xyloglucan extracted from the second and third internodes of pea epicotyls cell walls in a pH-dependent manner, similar to the binding pattern obtained with nascent polymers. Maxi-mum binding occurred at pH 3-4, and also required the presence of protein.

关键词： Assemblin Cell Wall Assembly Glucuronoxylan Pectin Pisum Sativum Xyloglucan

Manual mid-stromal dissection as a low risk procedure to stabilize mild to moderate progressive keratoconus

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Eye and Vision 2018年第1期5卷 233-239页

作者： Rénuka S Birbal Korine van Dijk Jack S Parker Henny Otten Maha Belmoukadim Lisanne Ham Lamis baydoun Isabel Dapena Gerrit R J Melles Netherlands Institute for Innovative Ocular Surgery(NIIOS)Rotterdam Laan op Zuid 883071AA RotterdamThe Netherlands Melles Cornea Clinic Rotterdam RotterdamThe Netherlands Amnitrans EyeBank Rotterdam RotterdamThe Netherlands. NIIOS-USA San DiegoUSA Parker Cornea BirminghamALUSA Visser Contact Lens Practice Nijmegen/Rotterdam RotterdamThe Netherlands

Background:To evaluate the efficacy of manual mid-stromal dissection in stabilizing progressive ***:Surgeries were performed in 16 eyes of 14 patients with progressive *** eyes were examined before and at 1 day,1 week,1,3,6 and 12 months after surgery,and every 6 months ***(simK,Kmax and pachymetry),best corrected visual acuity(BCVA)and subjective refraction were recorded up to the latest follow-up visit(mean follow-up time 6.6±2.4 years).Results:All surgeries were uneventful,and no postoperative complications *** values(n=15)stabilized in 6/11 eyes(55%)with a preoperative Kmax60 D showed continued *** 11/15 eyes(73%)pachymetry was *** with spectacles remained stable in 7/12 eyes(58%)and improved≥2 Snellen lines in 5/12 eyes(42%).BCVA with a contact lens remained stable in 4/9 eyes(44%),improved≥2 Snellen lines in 3/9 eyes(33%)and deteriorated in 2/9 eyes(22%).Conclusions:Manual mid-stromal dissection was effective in 50%of keratoconic corneas with Kmax values<60 D and may be considered in cases ineligible for other interventions such as UV-crosslinking,stromal ring implantation or Bowman layer *** advantage of the procedure may be that the tissue is unaltered and that no synthetic or biological implant is required.

关键词： Keratoconus Manual cornea dissection Progressive ectasia Surgical technique