检索结果-南通市图书馆

Pleomorphic Nasopharyngeal Liposarcoma: An Aggressive Tumor

在线全文

学校读者我要写书评

暂无评论

International Journal of Otolaryngology and Head & Neck surgery 2024年第1期13卷 11-15页

作者： Mame sanou Diouf sall Ahmadou Cheikhou Ndiaye Ciré Thiam Amadou Abdoulaye Diop Deguenonvo richard Edouard Alain Diom Evelyne siga Ndiaye Malick Diallo Bay Karim Diouf Raymond ENT and Cervicofacial surgery Department Idrissa Pouye General Hospital Grand-Yoff Dakar Senegal ENT Department Diamniadio Children’s Hospital Dakar Senegal ENT clinic Lamine sine Diop Dakar Senegal ENT Department and Cervico-Facial surgery H&#244pital de la paix Ziguinchor Senegal ENT and Cervicofacial surgery Department Albert Royer Children’s Hospital Dakar Senegal

Nasopharyngeal liposarcoma is an extremely rare clinical entity. Less than ten cases have been reported in the literature. It mainly occurs in humans. The non-specificity of the clinical and radiological signs explains the difficulty of the diagnosis confirmed by anatomopathological and immunohistochemical examinations. Its pathogenesis remains obscure and often correlates with genetic abnormalities. Pleomorphic liposarcoma is its rarest subtype, remarkable for its aggressiveness and rapidity of growth. Complete surgical excision remains the treatment of choice. We report a case of liposarcoma whose diagnosis was made during histological examination coupled with immunohistochemistry. .

关键词： Liposarcoma Nasopharynx Pathology Immunohistochemistry

An Inquiry into the Determinants of the Exports of China and India

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China & World Economy 2008年第5期16卷 1-15页

作者： richard s.Eckaus Ford Foundation Professor of International Economics Emeritus Department of EconomicsMITUSA

Regression analysis is used to tease out the relative significance of influences on the supply and demand for the exports of China and India. On the supply side, the value-added tax in China has discouraged export supply. The elimination of the rebate on those taxes will discourage exports. Higher wages discourage exports, but the share of exports by foreign invested enterprise is a positive influence, as is a higher share of value added in output and greater experience in exporting. On the demand side, exports depend in part on aggregate income levels in importing countries. Relative wages have been more important than exchange rates in determining the demands for Chinese and Indian exports. This evidence does not support the pressures for a devaluation of the RMB. There is also evidence of the positive significance of the accustomization of purchasers to buying Chinese exports.

关键词： China's exchange rate China's exports India's exports value-added tax

Observational Diagnosis of Cloud Phase in the Winter Antarctic Atmosphere for Parameterizations in Climate Models

在线全文

学校读者我要写书评

暂无评论

Advances in Atmospheric sciences 2010年第6期27卷 1233-1245页

作者： Yong-sang CHOI Chang-Hoi HO sang-Woo KIM richard s.LINDZEN Department of Environmental science and Engineering Ewha Womans University Department of Earth Atmospheric and Planetary SciencesMassachusetts Institute of Technology school of Earth and Environmental sciences Seoul National University

The cloud phase composition of cold clouds in the Antarctic atmosphere is explored using data from the Moderate Resolution Imaging spectroradiometer （MODIs） and Cloud-Aerosol Lidar with Orthogonal Polarization （CALIOP） instruments for the period 2000-2006. We used the averaged fraction of liquid-phase clouds out of the total cloud amount at the cloud tops since the value is comparable in the two measurements. MODIs data for the winter months （June, July, and August） reveal liquid cloud fraction out of the total cloud amount significantly decreases with decreasing cloud-top temperature below 0°C. In addition, the CALIOP vertical profiles show that below the ice clouds, low-lying liquid clouds are distributed over ～20% of the area. With increasing latitude, the liquid cloud fraction decreases as a function of the local temperature. The MODIs-observed relation between the cloud-top liquid fraction and cloud-top temperature is then applied to evaluate the cloud phase parameterization in climate models, in which condensed cloud water is repartitioned between liquid water and ice on the basis of the grid point temperature. It is found that models assuming overly high cut-offs （ -40°C） for the separation of ice clouds from mixed-phase clouds may significantly underestimate the liquid cloud fraction in the winter Antarctic atmosphere. Correction of the bias in the liquid cloud fraction would serve to reduce the large uncertainty in cloud radiative effects.

关键词： cloud phase mixed-phase clouds polar cloud cloud radiative effect cloud parameterization

Choledochal cysts: similarities and differences between Asian and Western countries

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2019年第26期25卷 3334-3343页

作者： George N Baison Morgan M Bonds William s Helton richard A Kozarek Digestive Disease Institute Virginia Mason Medical Center

Choledochal cysts(CCs)are rare bile duct dilatations,intra-and/or extrahepatic,and have higher prevalence in the Asian population compared to Western *** of the current literature on CC disease originates from Asia where these entities are most *** are thought to arise from an anomalous pancreaticobiliary junction,which are congenital anomalies between pancreatic and bile *** similarities in presentation between Eastern and Western patients exist such as female predominance,however,contemporary studies suggest that Asian patients may be more symptomatic on *** though CC disease presents with an increased malignant risk reported to be more than 10%after the second decade of life in Asian patients,this risk may be overstated in Western *** this difference in cancer risk,management guidelines for all patients with CC are based predominantly on observations reported from Asia where it is recommended that all CCs should be excised out of concern for the presence or development of biliary tract cancer.

关键词： Choledochal cyst Cholangiocarcinoma Asian populations Western populations Anomalous pancreaticobiliary junction

On seismic excitation of the polar motion

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese science Bulletin 1996年第10期41卷 832-836页

作者： Beniamin Fong Chao 韩延本 richard s. Gross Geodynamics Branch NASA Goddard Space Flight Center Greenbelt Maryland 20771 USA Beijing Astronomical Observatory Chinese Academy of Sciences Beijing 100080 China Jet Propulsion Laboratory California Institute of Technology Pasadena CA 91109 USA

1 studies of seismic excitation of the polar motion The earth’s rotation varies slightly with time. The 3-D earth rotation variation canbe conveniently separated into two components: i) the 1-D variation in the spin rate, oftenexpressed in terms of the length-of-day variation, ii) the 2-D variation in the rotational axisorientation, known as the polar motion as seen in the terrestrial referenee frame.

关键词： earthquake polar motion earth rotation.

Optimal orientations of discrete global grids and the Poles of Inaccessibility

在线全文

学校读者我要写书评

暂无评论

International Journal of Digital Earth 2020年第7期13卷 803-816页

作者： richard Barnes Energy&Resources Group BerkeleyUSA Electrical Engineering&Comptuer science BerkeleyUSA

spatial analyses involving binning often require that every bin have the same area,but this is impossible using a rectangular grid laid over the Earth or over any projection of the *** global grids use hexagons,triangles,and diamonds to overcome this issue,overlaying the Earth with equally-sized *** discrete global grids are formed by tiling the faces of a ***,the orientations of these polyhedra have been chosen to satisfy only simple criteria such as equatorial symmetry or minimizing the number of vertices intersecting ***,projection distortion and singularities in discrete global grids mean that such simple orientations may not be sufficient for all use ***,I present an algorithm for finding suitable orientations;this involves solving a nonconvex optimization *** a side-effect of this study I show that Fuller’s Dymaxion map corresponds closely to one of the optimal orientations I find.I also give new high-accuracy calculations of the Poles of Inaccessibility,which show that Point Nemo,the Oceanic Pole of Inaccessibility,is 15 km farther from land than previously recognized.

关键词： Discrete grid geographic information system(GIs) geoinformatics supercomputer projections spatial statistics

A NOTE ON THE EMPLOYMENT OF THE DEDICATION FORMULA IR.N.F M MNW.F FOR NON-ROYAL INDIVIDUALs

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 Ancient Civilizations 1994年 9卷 95-98页

作者： Edmunds.meltzer IHAC

In two recent studies of the dedication formulai(?)n.f m mnw.f, sayed Tawfik and Günther Vittmann mention very few examples in which it is employed by private individuals. Tawfik states that the rare instances of that kind are those in which the dedication is made to one’s ancestors, though the passage he cites from the autobiography of Chnumhotpe II does not conform to that pattern. Vittmann adds Cairo CG 23019, an offering table with two parallel formulae recording a dedication at the staircases of Osiris and Wepwawet at Abydos in exchange for funerary wishes and offerings, and he also includes an example from Meir.

关键词： private recording conform offering passage formulae mention Jansen estate owner

Analysis of the meiosis in the F_1 hybrids of Longiflorum × Asiatic(LA) of lilies(Lilium) using genomic in situ hybridization

在线全文

学校读者我要写书评

暂无评论

Journal of Genetics and Genomics 2008年第11期35卷 687-695页

作者： shujun Zhou Munikote s. Ramanna richard G.E Visser Jaap M. van Tuyl Institute of Landscape College of Agriculture ＆ Biotechnology Zhejiang University Hangzhou 310029 China Plant Breeding Lab Wageningen University P.O. Box 386 6700 AJ Wageningen The Netherlands

Longiflorum and Asiatic lilies of the genus Lilium of the family Liliaceae are two important groups of modem lily cultivars. One of the main trends of lily breeding is to realize introgression between these groups. With cut style pollination and embryo rescue, distant hybrids between the two groups have been obtained. However, the FI hybrids are highly sterile or some of them could produce a small number of 2n gametes, and their BC1 progenies are usually triploids. Dutch lily breeders have selected many cultivars from these BC1 progenies based on their variation. It is presumably suggested that such variation could be caused by intergenomic recombination and abnormal meiosis during gamete formation in F1 hybrids of Longiflorum × Asiatic （LA） hybrids in Lilium. Therefore, the meiotic process of ten F1 LA hybrids was cytologically investigated using genomic in situ hybridization and traditional cytological methods in the present research. The results showed that： at metaphase I, the homoeologous chromosome pairing among different F1 hybrids ranged from 2.0 to 11.4 bivalents formed by homoeologous chromosomes per pollen mother cell （PMC）, and very few multivalents, and even very few bivalents were formed by two chromosomes within one genome rather than homoeologous chromosomes in some PMCs; at anaphase I, all biva- lents were disjoined and most univalents were divided. Both the disjoined bivalents （half-bivalents） and the divided univalents （sister chromatids） moved to the opposite poles, and then formed two groups of chromosomes; because the two resulting half-bivalents retained their axes in the cell undisturbed, many crossover types, including single crossovers, three strand double crossovers, four strand double crossovers, four strand triple crossovers, and four strand multiple crossovers between the non-sister chromatids in the tetrads of bivalents, were clearly inferred by analyzing the breakpoints on the disjoined bivalents. The present investigation not only ex

关键词： Lilium genomic in situ hybridization abnormal meiosis crossover 2n gamete

Cardiac rehabilitation and exercise therapy in the elderly： should we invest in the aged？

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2012年第1期9卷 68-75页

作者： Arthur R Menezes Carl J Lavie richard V Milani Ross A Arena Timothy s Church Department of Cardiovascular Diseases John Ochsner Heart and Vascular Institute Ochsner Clinical School The University of Queensland School ofMedicine 1514 Jefferson Highway New Orleans LA 70121 USA Department of Orthopaedics Physical Therapy Program and Division of Cardiology Department of Internal Medicine University of New MexicoAlbuquerque NM87131 USA Department of Preventive Medicine Pennington Biomedical Research Center Louisiana State University System Baton Rouge LA 70808 USA

Coronary heart disease （CHD） is the leading cause of death worldwide and becomes increasingly prevalent among patients aged 65 years and *** patients are at a higher risk for complications and accelerated physical deconditioning after a cardiovascular event,especially compared to their younger *** last few decades were privy to multiple studies that demonstrated the beneficial effects of cardiac rehabilitation （CR） and exercise therapy on mortality,exercise capacity,psychological risk factors,inflammation,and obesity among patients with ***,a significant portion of the available data in this field pertains to younger patients.A viable explanation is that older patients are grossly underrepresented in these programs for multiple reasons starting with the patient and extending to the *** this article,we will review the benefits of CR programs among the elderly,as well as some of the barriers that hinder their participation.

关键词： Cardiac rehabilitation Exercise therapy Elderly patients Exercise capacity