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Chronic allograft rejection:A significant hurdle to transplant success

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Burns & Trauma 2014年第1期2卷 3-10页

作者： Malgorzata Kloc rafik M.Ghobrial Department of Surgery Houston Methodist HospitalHouston Houston Methodist Hospital Research Institute HoustonTXUSA

The state-of-the-art immunosuppression drugs do not ensure indefi nite transplant survival,and most transplants are continuously lost to chronic rejection even years *** form of rejection is responsible for long-term failure of transplanted *** mechanisms involved in development of chronic rejection are not *** of the main features of chronic rejection is progressive luminal narrowing of graft vessels,which results in compromised blood flow,ischemia,cell death,and finally graft *** the existing immunosuppressive regimens are targeting acute rejection,and at present there is no available therapy for prevention of chronic *** rejection involves two major,but interrelated responses:The first is the host immune response against the transplant mediated primarily by alloreactive T and B cells,and the second is injury and repair of the graft(vasculopathy of graft vessels).Here we focus on recent advances in understanding the cellular and molecular aspects of chronic transplant vasculopathy and function of macrophages,topics pivotal for development of novel antichronic rejection therapies.

关键词： Chronic rejection macrophage neointima consists of smooth muscle cells vasculopathy

Testicular torsion in undescended testis:A persistent challenge

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Asian Journal of Urology 2017年第2期4卷 111-115页

作者： Sahbi Naouar Salem Braiek rafik El Kamel Urology Department Les Aghlabites Surgical DivisionIbn El Jazzar Teaching HospitalKairouanTunisia

Objective:To evaluate the management and outcomes of patients who presented with torsion of an undescended testis and review the reported series in the ***:The case records of 13 patients operated for testicular torsion involving undescended testis were retrospectively *** medical records included age at presentation,medical history,physical examination,operative findings and the results of *** diagnosis of torsion of undescended testis was made clinically and confirmed by inguinal ***:In six cases the testis was preserved and orchiopexy was performed,while in seven cases orchidectomy was performed due to testicular gangrene in six patients and testicular tumor discovered peroperatively in one *** duration of symptoms at time of surgery in the orchiopexy group was 6.5 h and in the orchidectomy group was 21.2 *** six patients treated by orchiopexy,two patients suffered from testicular atrophy at a mean of 24 ***:Testicular torsion in undescended testis is still diagnosed with delay which may affect testicular *** importance of examination of external genital organs is highlighted which should be routinely included by emergency physicians in physical examination for abdominal or groin pain.

关键词： Testis torsion Undescended testis Misdiagnosis Salvageability

Comparative Taxonomical Studies on the Egyptian Red Sea Cephalopods (Cephalopoda: Mollusca)

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Open Journal of Marine Science 2022年第3期12卷 61-82页

作者： rafik Riad National Institute of Oceanography and Fisheries (NIOF) Cairo Egypt

Cephalopods are known to be commercially important around the world. Worth mentioning it constitutes a major part of the Egyptian fishing industry. Samples of cephalopods were collected from fishing boats in the Suez Gulf and Egyptian Red Sea. Cuttlefishes, squids, and octopuses had their club of the tentacle, arm IV hectocotylus, sucker of the club of the tentacle, sucker ring of the club of the tentacle, arm sucker, arm sucker ring, radula, gill, and shell. Various organs were photographed using a Canon G7X digital Camera. Eleven Egyptian Red Sea cephalopod species were encountered;three of them are cuttlefish species namely: Sepia dollfusi, Sepia pharaonis, and Sepia elongata. Three squid species namely: Loligo forbesii, Uroteuthis Photololigo duvaucelii, and Sepioteuthis lessoniana were also encountered. Five octopus species were also recorded namely: Octopus vulgaris, Callistoctopus macropus, Macrotritopus defilippi, Amphyoctopus aegina, and Amphyoctopus membranaceus. Aims of the current work are to differentiate between some Cephalopod species living in the Red Sea of Egypt and evaluate the status to achieve a reliable differentiation between these species.

关键词： Comparative Cephalopods Egyptian Red Sea Taxonomy

Nickel ferrite spinel as catalyst precursor in the dry reforming of methane:Synthesis,characterization and catalytic properties

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Journal of Natural Gas Chemistry 2012年第5期21卷 595-604页

作者： rafik Benrabaa Hamza Boukhlouf Axel Lfberg Annick Rubbens Rose-Nelle Vannier Elisabeth Bordes-Richard Akila Barama Laboratoire de Matériaux Catalytiques & Catalyse en Chimie Organique Faculté de ChimieUSTHBBP32 El Alia16111 Bab EzzouarAlgerAlgérie Unité de Catalyse et de Chimie du Solide UMR CNRS 8181Ecole Nationale Supérieure de Chimie de LilleUniversitédes Sciences et Technologies de LilleCité Scientif ique59655 Villeneuve d'AscqFrance

Dry reforming of methane by CO2 using nickel ferrite as precursor of catalysts was *** ferrite crystalline particles were prepared by coprecipitation of nitrates with NaOH or ammonia followed by calcination,or by hydrothermal synthesis without calcination *** textural and structural properties were determined by a number of analysis methods,including X-ray diffraction （XRD）,Raman spectroscopy and X-ray photoelectron spectroscopy （XPS）,among which X-ray diffraction （XRD） was at room and variable *** synthesized oxides showed the presence of micro or nanoparticles of NiFe2O4 inverse spinel,but Fe2O3 （hematite） was also present when ammonia was used for *** reducibility by hydrogen was studied by temperature-programmed reduction （TPR） and in situ XRD,which showed the influence of the preparation *** surface area （BET）,particle size （Rietveld refinement）,as well as surface Ni/Fe atomic ratio （XPS） and the behavior upon reduction varied according to the synthesis *** catalytic reactivity was investigated using isopropanol decomposition to determine the acid/base *** catalytic performance of methane reforming with CO2 was measured with and without the pre-treatment of catalysts under H2 in 650-800 C *** catalytic conversions of methane and CO2 were quite low but they increased when the catalysts were pre-reduced.A significant contribution of reverse water gas shift reaction accounted for the low values of H2 /CO *** coking was observed as shown by the reoxidation step performed after the catalytic *** possible formation of nickel-iron alloy observed during the study of reducibility by hydrogen was invoked to account for the catalytic behavior.

关键词： dry reforming of methane NiFe2O4 spinel hydrothermal synthesis coprecipitation isopropanol decomposition

A Solution of Generalized Cosine Equation in Hilbert’s Fourth Problem

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Advances in Pure Mathematics 2014年第6期4卷 234-241页

作者： rafik Aramyan 1Russian-Armenian (Slavonic) University Yerevan Armenia 2Institute of Mathematics National Academy of Sciences Yerevan Armenia

A solution of Hilbert’s fourth problem leads to the integral equation which can be called the generalized cosine equation. In the present paper, we propose an inversion formula for the solution of the generalized cos... 详细信息

关键词： Integral Geometry Integral Equation Finsler Metrics Flag Density

A Topological Clustering of Variables

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Journal of Mathematics and System Science 2021年第2期11卷 1-17页

作者： rafik Abdesselam ERIC and COACTIS Laboratories Department of Economics and ManagementUniversity of LyonFrance

The clustering of objects(individuals or variables)is one of the most used approaches to exploring multivariate *** two most common unsupervised clustering strategies are hierarchical ascending clustering(HAC)and k-means partitioning used to identify groups of similar objects in a dataset to divide it into homogeneous *** proposed topological clustering of variables,called TCV,studies an homogeneous set of variables defined on the same set of individuals,based on the notion of neighborhood graphs,some of these variables are more-or-less correlated or linked according to the type quantitative or qualitative of the *** topological data analysis approach can then be useful for dimension reduction and variable ***’s a topological hierarchical clustering analysis of a set of variables which can be quantitative,qualitative or a mixture of *** arranges variables into homogeneous groups according to their correlations or associations studied in a topological context of principal component analysis(PCA)or multiple correspondence analysis(MCA).The proposed TCV is adapted to the type of data considered,its principle is presented and illustrated using simple real datasets with quantitative,qualitative and mixed *** results of these illustrative examples are compared to those of other variables clustering approaches.

关键词： Hierarchical clustering proximity measure neighborhood graph adjacency matrix multivariate quantitative qualitative and mixed data analysis dimension reduction

Reconstruction of Three Dimensional Convex Bodies from the Curvatures of Their Shadows

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American Journal of Computational Mathematics 2015年第2期5卷 86-95页

作者： rafik Aramyan Russian-Armenian (Slavonic) University Yerevan Armenia Institute of Mathematics Armenian Academy of Sciences Yerevan Armenia

In this article, we study necessary and sufficient conditions for a function, defined on the space of flags to be the projection curvature radius function for a convex body. This type of inverse problems has been studied by Christoffel, Minkwoski for the case of mean and Gauss curvatures. We suggest an algorithm of reconstruction of a convex body from its projection curvature radius function by finding a representation for the support function of the body. We lead the problem to a system of differential equations of second order on the sphere and solve it applying a consistency method suggested by the author of the article.

关键词： Integral Geometry Convex Body Projection Curvature Support Function

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Neutrum

德语学习 2008年第6期 9-10页

作者： rafik Schami

Das Neutrum der deutschen Sprache kann ich auch heute, nach über zweiundzwanzig Jahren in Deutschland, noch nicht leiden. Die arabische Sprache kennt kein Neutrum.

关键词： der Neutrum

Laparoskopy and Thoracoscopy in Complex Inspection and Treatment Patients with Locally Extended Esophageal Cancer

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海外英语 2010年第8X期 345-347页

作者： Khairuddinov rafik Vahidovich The Republican Research Centre of Oncologyunder the Ministry of Health of the Republic of Uzbekistan

The great attention has been paid to the mini-invasive methods of the distribution of the malignant process in the thoracic and abdominal cavities for last time. In the Thoracic department of the Republican Research Oncological Centre of the Republic of Uzbekistan during the period from 2004 to 2008 in the plan of investigation of the patients with esophageal and stomach cancer including roentgenoscopy and (or) roentgenography of the thoracic chest, contrast esophageal and stomach roentgenoscopy, EPGDS and ultrasonography of the mediastinal and abdominal cavity organs additionally computed tomography and diagnostic thoraco-and (or) laparoscopy were included. The cancer of mesothoracic esophageal part with invasion into the upper thoracic part was diagnosed in 2 patients, the cancer of mesothoracic esophageal part-in 12 patients, the cancer of the middle and the lower parts-in 7 patients, the cancer the lower thorax part-in 7 patients, the cardioesophageal cancer-in 9 patients, a total cancer of a stomach with affection of the bottom third of the oesophagus-in 1 patient. Thoracoscopy and laparoscopy allow determination of the respectability of the tumorous process in the esophageal and stomach cancer considerably lowering the number of exploratory thoracotomies and laparotomies.

关键词： esophageal and stomach cancer laparo-and thoracoscopy locally extended