检索结果-南通市图书馆

A nOTE On H-w^p-BOUnDEDnESS OF RIESZ TRAnSFORMS AnD θ-CALDERón-ZYGMUnD OPERATORS THROUGH MOLECULAR CHARACTERIZATIOn

在线全文

学校读者我要写书评

暂无评论

Analysis in Theory and Applications 2011年第3期27卷 251-264页

作者： Luong Dang ky University of Orleans

Let 0 〈 p ≤ 1 and w in the Muckenhoupt class A1. Recently, by using the weighted atomic decomposition and molecular characterization, Lee, Lin and yang[11] established that the Riesz transforms R j, j = 1,2,..., n, are bounded on Hwp （Rn）. In this note we extend this to the general case of weight w in the Muckenhoupt class A.. through molecular characterization. One difficulty, which has not been taken care in [11] consists in passing from atoms to all functions in HwP（Rn）. Furthermore, the HwP-boundedness of θ- Calderon-Zygmund operators are also given through molecular characterization and atomic decomposition.

关键词： Muckenhoupt weight Riesz transform Calderon-Zygmund operator

Insulinoma presenting with postprandial hypoglycemia and a low body mass index:A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2020年第18期8卷 4169-4176页

作者： Dana Prídavková Matej Samoš Roman kyčina Katarína Adamicová Michal Kalman Margita Belicová Marián Mokáň Clinic of Internal Medicine Ⅰ Comenius University in BratislavaJessenius Faculty of Medicine in MartinMartin 03601Slovakia Clinic of Surgery and Transplant Center Comenius University in BratislavaJessenius Faculty of Medicine in MartinMartin 03601Slovakia Department of Pathological Anatomy Comenius University in BratislavaJessenius Faculty of Medicine in MartinMartin 03601Slovakia

BACKGROUnD Insulinomas are the most common type of functioning endocrine neoplasms of the pancreas presenting hypoglycemic *** characteristically develop symptoms while fasting,but some patients have reported symptoms only in the postprandial *** and prolonged hypoglycemic episodes can reduce the awareness of adrenergic symptoms,and patients may have amnesia,which delays *** SUMMARY We describe a case of a 24-year-old underweight patient who showed hypoglycemic symptoms for almost 6 *** patients with insulinoma characteristically develop symptoms while fasting,this young man had hypoglycemic symptoms up to one hour postprandially,especially after highsugar meals and after physical *** fasting tests and imaging methods performed at local hospitals were evaluated as negative for abnormal ***,brown adipose tissue exhibited increased metabolic activity,and some muscle groups had histological changes as indicated by positron emission tomography with 2-deoxy-2-[fluorine-18]fluoro-D-glucose integrated with computed *** deficiency was also histologically *** patient’s symptoms progressed over the years and occurred more frequently,i.e.,several times a month,and the patient had reduced awareness of adrenergic *** follow-up fasting test was positive,and the imaging results showed a tumor in the head of the *** patient underwent laparotomy with enucleation of the *** Weight gain and fasting hypoglycemia are not necessarily characteristics of *** prolonged cases,adrenergic symptoms can be suppressed.

关键词： Brown adipose tissue Glycogen deficit Hypoglycemia Insulinoma Underweight Case report

numerical Study of a Cylindro-Parabolic Cooker “Blazing Tube”

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Applied Sciences 2022年第11期12卷 1783-1795页

作者： Boureima Dianda Mibienpan Ki Wende Pouiré Germain Ouédraogo nébon Bado Sikoudouin Maurice Thierry ky Bruno Korgo Sié Kam Dieudonné Joseph Bathiebo national Center for Scientific and Technological Research Ouagadougou Burkina Faso Laboratory of Renewable Thermal Energies University Josph Ki-Zerbo Ouagadougou Burkina Faso Higher School of Engineering (ESI) University of Fada N’Gourma Fada N’Gourma Burkina Faso

The objective of this work is to numerically determine the thermal performance of the parabolic cylinder cooker commonly “blazing tube”. These performances were determined by establishing heat balances at the different levels of the system. The equations obtained have been discretized;simplifying assumptions have been made to facilitate their resolution. We adopted Gauss Seidel’s method using MATLAB software to solve these equations. The temperatures of the coolant, the glass and the absorber were determined as a function of time and along the tube. The thermal efficiency was also determined. It emerged that the different temperatures evolve linearly as a function of the length of the tube. Yield and temperatures depend on the amount of sunshine.

关键词： Solar Cooker Heat Transfer Fluid Temperature Yield Sunshine

Rnase MRP RnA and human genetic diseases

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Cell Research 2007年第3期17卷 219-226页

作者： Allison n Martin Department of Biochemistry and Molecular Biology and Center for Genetics and Molecular Medicine School of Medicine University of Louisville 319 Abraham Flexner Way ky 40202 USA

Rnase MRP RnA is the RnA subunit of the Rnase mitochondrial RnA processing(MRP)enzyme complex that isinvolved in multiple cellular RnA processing *** on Rnase MRP RnA gene(RMRP)cause a recessivelyinherited developmental disorder,cartilage-hair hypoplasia(CHH).The relationship of the genotype(RMRP mutation),RnA processing deficiency of the Rnase MRP complex,and the phenotype of CHH and other skeletal dysplasias is yetto be explored.

关键词： Rnase MRP RnA cartilage-hair hypoplasia

CD8+T cell metabolic flexibility elicited by CD28-ARS2 axisdriven alternative splicing of PKM supports antitumor immunity

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Cellular & Molecular Immunology 2024年第3期21卷 260-274页

作者： G.Aaron Holling Colin A.Chavel Anand P.Sharda Mackenzie M.Lieberman Caitlin M.James Shivana M.Lightman Jason H.Tong Guanxi Qiao Tiffany R.Emmons Thejaswini Giridharan Shengqi Hou Andrew M.Intlekofer Richard M.Higashi Teresa W.M.Fan Andrew n.Lane Kevin H.Eng Brahm H.Segal Elizabeth A.Repasky Kelvin P.Lee Scott H.Olejniczak Department of Immunology Roswell Park Comprehensive Cancer CenterBuffaloNY 14263USA Department of Medicine Roswell Park Comprehensive Cancer CenterBuffaloNY 14263USA Human Oncology and Pathogenesis Program Memorial Sloan Kettering Cancer CenterNew YorkNY 10065USA Center for Environmental Systems Biochemistry Department of Toxicology and Cancer Biology and Markey Cancer CenterLexingtonKY 40536USA Department of Cancer Genetics and Genomics Roswell Park Comprehensive Cancer CenterBuffaloNY 14263USA Present address:University of Colorado Boulder BoulderCO 80309USA Present address:Dana Farber Cancer Institute BostonMA 02215USA Present address:Massachusetts Institute of Technology BostonMA 02139USA Present address:Melvin and Bren Simon Comprehensive Cancer Center Indiana University School of MedicineIndianapolisIN 46202USA

Metabolic flexibility has emerged as a critical determinant of CD8+T-cell antitumor activity,yet the mechanisms driving the metabolic flexibility of T cells have not been *** this study,we investigated the influence of the nuclear cap-binding complex(CBC)adaptor protein ARS2 on mature T *** doing so,we discovered a novel signaling axis that endows activated CD8+T cells with flexibility of glucose ***2 upregulation driven by CD28 signaling reinforced splicing factor recruitment to pre-mRnAs and affected approximately one-third of T-cell activation-induced alternative splicing *** these effects,the CD28-ARS2 axis suppressed the expression of the M1 isoform of pyruvate kinase in favor of PKM2,a key determinant of CD8+T-cell glucose utilization,interferon gamma production,and antitumor effector ***,PKM alternative splicing occurred independently of CD28-driven PI3K pathway activation,revealing a novel means by which costimulation reprograms glucose metabolism in CD8+T cells.

关键词： Immunometabolism mRnA splicing CD8 T cells ARS2 PKM2

Compressional origin of the Aegean Orogeny,Greece

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Geoscience Frontiers 2022年第2期13卷 383-404页

作者： Michael P.Searle Thomas n.Lamont Dept Earth Sciences Oxford UniversitySouth Parks RoadOxfordOX13ANUK School of Earth and Environmental Sciences University of St AndrewsSt AndrewsKY169ALUK

The Aegean Sea area is thought to be an actively extending back-arc region,north of the present day Hellenic volcanic arc and north-dipping subduction zone in the Eastern *** area shows extensive normal faulting,ductile‘extensional’shear zones and extensional S-C fabrics throughout the islands that have previously been related to regional Aegean extension associated with slab rollback on the Hellenic Subduction *** this paper,we question this interpretation,and suggest the Cenozoic geodynamic evolution of the Aegean region is associated with a Late Cretaceous-Eocene nE-dipping subduction zone that was responsible for continentcontinent collision between Eurasia and Adria-Apulia/*** of eclogite and blueschist facies rocks in the Cyclades and kyanite-sillimanite grade gneisses in the naxos core complex have pressures that are far greater than could be accounted for purely by lithospheric extension and isostatic *** identify four stages of crustal shortening that affected the region prior to regional lithospheric extension,herein called the Aegean *** orogeny followed a classic Wilson cycle from early ophiolite obduction(ca.74 Ma)onto a previously passive continental margin,to attempted crustal subduction with HP eclogite and blueschist facies metamorphism(ca.54-45 Ma),through crustal thickening and regional kyanite-sillimanite grade Barroviantype metamorphism(ca.22-14 Ma),to orogenic collapse(nsional’fabrics relate to:(1)Exhumation of blueschists and eclogite facies rocks showing tight-isoclinal folds and top-nE,base-SW fabrics,recording return flow along a subduction channel in a compressional tectonic setting(ca.50-35 Ma).(2)Extensional fabrics within the core complexes formed by exhumation of kyanite-and sillimanite gneisses showing thrust-related fabrics at the base and‘extensional’fabrics along the top(ca.18.5-14 Ma).(3)Regional ductile-brittle‘extensional’fabrics and low-angle

关键词： Cyclades Ophiolite High-pressure metamorphism Core complex Compressional tectonics

Congenital Toxoplasmosis or the Tip of an Iceberg. Report of Two Cases

在线全文

学校读者我要写书评

暂无评论

Open Journal of Pediatrics 2022年第1期12卷 213-222页

作者： Kisito nagalo Sonia Kaboret Laure Toguyéni Auguste Attoh Aïssatou Bélemviré Myriam Sanwidi Balkissa Konaté Carine kyélem Diarra Yé Unité de néonatologie Centre Hospitalier Universitaire Pédiatrique Charles de Gaulle Ouagadougou Burkina Faso

Among the many parasitic diseases observed in the tropics, Toxoplasmosis is a fairly common occurrence. An infected pregnant woman can transmit it, transplacentally, to her foetus. Two cases of congenital toxoplasmosis are discussed in this study. One patient is at 7 days of life, while the other is at 9 days of life. The newborns displayed the typical symptoms of jaundice, hepatosplenomegaly, chorioretinitis, and cranioencephalic abnormalities. However, the uniqueness of these observations is the presence of umbilical haemorrhage, a symptom not described in the literature researched. The evolution of this finding, during treatment is distinguished by the symptoms persisting until six months of age, in addition to growth retardation of saturation-weight, with no retardation of psychomotor development in one patient, and with hydrocephalus accompanied by psychomotor retardation in the other one. Hence, it is recommended that pregnant women are systematically screened for toxoplasmosis, and seronegative women are monitored;in fact, the early and suitable management of congenital toxoplasmosis will significantly control this parasitosis.

关键词： Toxoplasmosis Congenital Toxoplasmosis Toxoplasma gondii Embryo-Fetopathy TORCH Infections

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

SF6断路器开断过程的数值模拟

高压电器 2000年第4期36卷 3-7,18页

作者：牟京卫 Park.,ky 西安高压电器研究所

本文通过在Ｎ－Ｓ方程组中加入源项以考虑电弧效应的方法建立了一个电弧模型，数值方法采用Ｔａｙｌｏｒ－ｇａｌｅｒｋｉｎ有限元法。使用该模型计压气压ＳＦ６断路器的开发过程进行了数值模拟。计算模型考虑了移动的边界条件。给出了... 详细信息

本文通过在Ｎ－Ｓ方程组中加入源项以考虑电弧效应的方法建立了一个电弧模型，数值方法采用Ｔａｙｌｏｒ－ｇａｌｅｒｋｉｎ有限元法。使用该模型计压气压ＳＦ６断路器的开发过程进行了数值模拟。计算模型考虑了移动的边界条件。给出了在不同开距下电弧温度分布、压力分布以及电弧电压等的数值计算结果，数值模拟结果与试验结果吻合。

关键词：数值模拟有限元法 SF6断路器开断过程

Diagnostic Input of Specialized Radiographic Examinations in Pediatric Setting in Ouagadougou (Burkina Faso)

在线全文

学校读者我要写书评

暂无评论

Open Journal of Radiology 2022年第2期12卷 49-57页

作者： nina-Astrid Ouedraogo Moussa Zanga Bénilde Marie Ange Tiemtoré Kambou ky Davy Sissiman Madina Aischa napon Boubacar Ouattara Ousséini Diallo Léonie Claudine Lougue Radiology Department of Bogodogo Teaching Hospital Ouagadougou Burkina Faso Training and Research Unit in Health Sciences University Joseph Ki-Zerbo Ouagadougou Burkina Faso Radiology Department of Charles de Gaulle Pediatric Teaching Hospital Ouagadougou Burkina Faso Radiology Department of Yalgado Ouédraogo Teaching Hospital Ouagadougou Burkina Faso

Context: In spite of the development of cross-sectional medical imaging and endoscopy means, the prescription of specialized radiographic examinations is still relevant in the pediatric environment in our country. Objective: Show the contribution of specialized radiographic examinations performed in pediatric settings. Methodology: This was a retrospective descriptive study implemented over a five year-period, from June 10th, 2014 to June 10th, 2019 within the radiology department of Charles De Gaulle Pediatric Teaching Hospital in Ouagadougou. This study included the results of 192 specialized radiographic examinations collected within the concerned department. Results: The average age of the patients was 4.21 years with extremes of 8 days and 15 years. Infants (29 days to 24 months) were the predominant age group with a rate of 53.13% (n = 102 patients). Boys represented 76.51% of the sample with a sex ratio estimated at 3.25. Specialized radiographic examinations represented 0.46% of the overall imaging examinations and 0.72% of radiographic examinations performed during the study period. 67.19% of pathological examinations were reported. Colonic enema and retrograde urethrocystography (RUC) were the most performed examinations respectively accounting for 33.34% and 27.6%. The radiographic findings were consistent with the diagnostic hypotheses in 41.6% of cases. Conclusion: Specialized radiographic examinations keep their place in the exploration of several pathologies in pediatric settings.

关键词： Esophageal Transit Retrograde Urethrocystography Hirschsprung’s Disease