检索结果-南通市图书馆

iSCHEMiA-REPERFUSiON LiVER iNJURY: EFFECT OF A NUTRiTiONAL APPROACH ON HEPATiC ANTiOXidANT SYSTEM

在线全文

学校读者我要写书评

暂无评论

ISCHEMIA-REPERFUSION LIVER INJURY: EFFECT OF A NUTRITIONAL A...

POLYMER CHARGE AND MOLECULAR WEiGHT EFFECTS ON TREATED iRRiGATiON FURROW PROCESSES

The Second international Symposium on Natural Antioxidants: Molecular Mechanisms and Health Effects

作者： F.Marotta G.M.idéo MG Seal CCWu PSafran M.Harada N.Yanaihara G.idéo. HGi Dept. S. G. Hosp. HGi Dept. S. G. Hosp. SFJO Labs. Surgery Dept Vet. Hosp Taichung SFJO Labs. MCH Hosp. MCH Hosp. HGi Dept. S. G. Hosp.

in the present study we tested a natural compound, i.e. K-17.22, which is endowed by antioxidant properties and transaminases-lowering effect in HCV patients, on free radicals-related liver damage by ischemia/reperfusion injury. Wistar rats were put on a 2-week supplementation with either A) standard diet or B) standard diet added with 30mg

关键词： Catalase GSH EFFECT OF A NUTRiTiONAL APPROACH ON HEPATiC ANTiOXidANT SYSTEM iSCHEMiA-REPERFUSiON LiVER iNJURY

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

international Journal of Sediment Research 2000年第1期15卷 17-30页

作者： R. D. Lentz(USDA-ARS, Northwest irrigation and Soils Research Laboratory, Kimberly, id)R. E. Sojka (Landcare Research, New Zealand, Ltd, Palmerston North, New ZealandNote: The manucript of this paper was received in March 1999, Discussion open until March USDA-ARS Northwest Irrigation and Soils Research Laboratory Kimberly ID United States Landcare Research New Zealand Ltd Palmerston North New Zealand

Application of 5-10 mg L-1 water soluble anionic polyacrylamide (PAM) to furrow irrigation water during flow advance substantially reduces sediment loss and increases net infiltration. We hypothesized that PAM_s solvated molecular conformation influences its irrigation-management efficacy. The study was conducted in Kimberly, idaho, on Portneuf silt loam (Durinodic Xeric Haplocalcids), under furrowirrigated beans (Phaseolus vulgaris ) at a 1.5% slope. Polyacrylamides with contrasting molecular weight (anionic; 4-7, 12- 15 and 14-17 MDa, i.e. Mg mol-1 ), charge type (neutral, anionic, cationic), and charge density (8, 19, 35 mol %) were tested in two studies. inflow rate was 23 L min-1 during furrow advance, and 15 L min-1 for the remaining set. Anionic and neutral PAMs were twice as effective as cationic PAMs for controlling sediment loss in new furrows. The order of effectiveness for overall soilloss control was : anionic ＞neutral ＞cationic PAM, and efficacy increased with increasing charge density and/or molecular weight. Net furrow infiltration increased by 14 to 19% when PAM treatment molecular weight was reduced from 17 to 4 MDa. General trends suggested that medium and high charge density anionic and neutral PAM produced the greatest increase in infiltration compared with *** with untreated furrows, neutral PAM gave the greatest season-long net infiltration gains (5%),while charged PAMs tended to increase net infiltration early in the season on new furrows but decreased infiltration on repeat-irrigated furrows later in the season.

关键词： Polymer charge Molecular weight effect Soil loss control Charge Density infiltration capacity

Natural convection of an alumina-water nanofluid inside an inclined wavy-walled cavity with a non-uniform heating using Tiwari and Das' nanofluid model

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2018年第10期39卷 1425-1436页

作者： M.A.SHEREMET R.TRiMBiTAS T.GROSAN2 i.POP Laboratory on Convective Heat and Mass Transfer Tomsk State UniversityTomsk 634050Russia Department of Mathematics Babes-Bolyai UniversityCluj-Napoca 400084Romania

The present study is devoted to numerical analysis of natural convective heat transfer and fluid flow of alumina-water nanofluid in an inclined wavy-walled cavity under the effect of non-uniform heating. A single-phase nanofluid model with experimental correlations for the nanofluid viscosity and thermal conductivity has been included in the mathematical model. The considered governing equations formulated in dimensionless stream function, vorticity, and temperature have been solved by the finite difference method. The cavity inclination angle and irregular walls(wavy and undulation numbers)are very good control parameters for the heat transfer and fluid flow. Nowadays, optimal parameters are necessary for the heat transfer enhancement in different practical applications. The effects of the involved parameters on the streamlines and isotherms as well as on the average Nusselt number and nanofluid flow rate have been analyzed. it has been found that the heat transfer rate and fluid flow rate are non-monotonic functions of the cavity inclination angle and undulation number.

关键词： wavy cavity natural convection Al2O3-water nanofluid non-uniform heating numerical result

investigation of SARS-CoV-2 Main Protease Potential inhibitory Activities of Some Natural Antiviral Compounds Via Molecular Docking and Dynamics Approaches

在线全文

学校读者我要写书评

暂无评论

Phyton-international Journal of Experimental Botany 2022年第5期91卷 1089-1104页

作者： Nada M.Mostafa Muhammad i.ismail Amr M.El-Araby Dina M.Bahgat Ahmed M.Elissawy Ahmed M.Mostafa Omayma A.Eldahshan Abdel Nasser B.Singab Department of Pharmacognosy Faculty of PharmacyAin Shams UniversityCairo11566Egypt Department of Pharmaceutical Chemistry Faculty of PharmacyThe British University in EgyptCairo11837Egypt Department of Pharmaceutical Chemistry Faculty of PharmacyAin Shams UniversityCairo11566Egypt Department of Biochemistry Faculty of PharmacyAin Shams UniversityCairo11566Egypt Center for Drug Discovery and Development Research Ain Shams UniversityCairo11566Egypt

Coronaviruses caused an outbreak pandemic disease characterized by a severe acute respiratory distress syndrome leading to the infection of more than 200 million patients and the death of more than 4 million *** primary treatment is either supportive or *** products have an important role in the development of various ***,screening of natural compounds with reported antiviral activities can lead to the discovery of potential inhibitory entities against *** the current study,an in-silico molecular docking experiment was conducted on the effects of some of these natural antiviral phytoconstituents,(e.g.,procyanidin B2,theaflavin,quercetin,ellagic acid,caffeoylquinic acid derivatives,berginin,eudesm-1β,6α,11-triol and arbutin),on the crystal structure of SARS-CoV-2 main protease(PDB id:6w63)using AutoDock-Vina *** of the docked compounds revealed good binding affinity,with procyanidin B2(–8.6 Kcal/mol)and theaflavin(–8.5 Kcal/mol)showing a better or similar binding score as the ligand(–8.5 Kcal/mol).Molecular dynamics simulations were carried out at 100 ns and revealed that procyanidin B2 forms a more stable complex with SARS-CoV-2 main protease than *** B2,theaflavin,and 4,5-dicaffeoylquinic acid were evaluated for toxicity by ProTox-ii webserver and were non-toxic according to the predicted LD50 values and safe on different organs and ***,these phytoconstituents showed good ADME properties and acceptable lipophilicity,as evaluated using *** the tested compounds,procyanidin B2 showed the highest lipophilic *** is worth mentioning that these natural inhibitiors of SARS-CoV-2 main protease are components of green and black tea that can be used as a supporting supplement for COVid patients or as potential nuclei for further drug design and development campaigns.

关键词： Coronavirus natural products SARS-CoV-2 main protease molecular docking molecular dynamics tea

Outcomes of Thyroid Surgery at Niamey National Hospital

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Surgical Science 2021年第7期12卷 218-225页

作者： Lassey James Didier Maman Bachir Abdoulaye Ousseini Adakal Harissou Adamou Adama Saidou ibrahim Amadou Magagi Kadi idé Moussa Gagara Maarouf Malam Taher Sidibé Rachid Sani Department of Surgery and Surgical Specialties National Hospital of Niamey Faculty of Health Sciences of the University Abdou Moumouni Niamey Niger Department of Surgery and Surgical Specialties Faculty of Health Sciences of the University of Maradi Maradi Niger Department of Surgery and Surgical Specialties Zinder National Hospital Faculty of Health Sciences of the University of Zinder Zinder Niger Department of Anesthesia Intensive Care and Emergencies Niamey National Hospital Niamey Niger Maternity issaka Gazobi Gynecology and Obstetrics Services Niamey Niger Radiology Department at Niamey National Hospital Niamey Niger

introduction: Goiter is the most common endocrine disease in the world. The objective of our study is to assess and compare the morbidity linked to the surgical management of goiters and thyroid tumors in the general surgery department of the Niamey National Hospital. Result: We collected data on a prospective basis on 112 cases having undergone a thyroidectomy between March 2019 and April 2020. The female sex is predominant with 96.4%, i.e. a sex ratio of 0.037. The average age is 41.2 years with extremes ranging from 22 to 72 years old. The average duration of evolution of goiter is 7.5 years with extremes ranging from 5 months to 20 years old. The first reason for consultation is anterior cervical swelling. TSH testing confirmed euthyroidism in 107 patients (95.5%). Therapeutically, loboisthmectomy is the most performed procedure with 43.7%. The postoperative hormonal assessment revealed 32% hypothyroidism at 6 months, with a significant difference for cases of total thyroidectomy. The occurrence of postoperative hypocalcemia was significantly greater after total and subtotal thyroidectomy. There is no significant difference in terms of recurrent complications. Conclusion: Thyroidectomies must be performed after adequate preparation and information to the patient on possible postoperative complications, hence the need for close medical monitoring immediately and remotely.

关键词： Goiter Thyroidectomy Complications Niamey Niger

On-surface activation of benzylic C-H bonds for the synthesis of pentagon-fused graphene nanoribbons

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2021年第12期14卷 4754-4759页

作者： Xiushang Xu Marco Di Giovannantonio José i.Urgel Carlo A.Pignedoli Pascal Ruffieux Klaus Müllen Roman Fasel Akimitsu Narita Present address:istituto di Struttura della Materia-CNR(iSM-CNR) via Fosso del Cavaliere 10000133RomaItaly Present address:iMDEA Nanoscience C/Faraday 9Campus de Cantoblanco28049MadridSpain Max Planck institute for Polymer Research 55128MainzGermany Empa Swiss Federal Laboratories for Materials Science and Technologynanotech@surfaces Laboratory8600DübendorfSwitzerland Organic and Carbon Nanomaterials Unit Okinawa Institute of Science and Technology Graduate University1919-1 TanchaOnna-sonKunigami-gunOkinawa904-0495Japan institute of Physical Chemistry Johannes Gutenberg University MainzDuesbergweg 10-1455128MainzGermany

Graphene nanoribbons (GNRs) have potential for applications in electronic devices. A key issue, thereby, is the fine-tuning of their electronic characteristics, which can be achieved through subtle structural modifications. These are not limited to the conventional armchair, zigzag, and cove edges, but also possible through incorporation of non-hexagonal rings. On-surface synthesis enables the fabrication and visualization of GNRs with atomically precise chemical structures, but strategies for the incorporation of non-hexagonal rings have been underexplored. Herein, we describe the on-surface synthesis of armchair-edged GNRs with incorporated five-membered rings through the C-H activation and cyclization of benzylic methyl groups. Ortho-Tolyl-substituted dibromobianthryl was employed as the precursor monomer, and visualization of the resulting structures after annealing at 300 °C on a gold surface by high-resolution noncontact atomic force microscopy clearly revealed the formation of methylene-bridged pentagons at the GNR edges. These persisted after annealing at 340 °C, along with a few fully conjugated pentagons having singly-hydrogenated apexes. The benzylic methyl groups could also migrate or cleave-off, resulting in defects lacking the five-membered rings. Moreover, unexpected and unique structural rearrangements, including the formation of embedded heptagons, were observed. Despite the coexistence of different reaction pathways that hamper selective synthesis of a uniform structure, our results provide novel insights into on-surface reactions en route to functional, non-benzenoid carbon nanomaterials.

关键词： graphene nanoribbons on-surface synthesis scanning-tunneling microscope noncontact atomic force microscope C-H activation

Modelling Solitary Waves and its impact on Coastal Houses with SPH Method

维普期刊数据库评论

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 Ocean Engineering 2010年第2期24卷 353-368页

作者： LiANG Dong-fang N. i. Thusyanthan S. P. Gopal Madabhushi 唐洪武 Department of Engineering University of Cambridge Cambridge CB2 1PZ UK KW Ltd Fetcham Park House Lotcer Road Fetcham Surrey KT22 91ID UK State Key Laboratory of Hydrology-Water Resources and Hydraulic Er~gineering Hohai University Nanjing 210098 China

The interaction between solid structures and free-surface flows is investigated in this study. A Smoothed Particle Hy- drodynamics （SPH） model is used in the investigation and is verified against analytical solutions and experimental obser- vations. The main aim is to examine the effectiveness of a tsunami-resistant house design by predicting the wave loads on it. To achieve this, the solitary wave generation and ran-up are studied first. The solitary wave is generated by allowing a heavily weighted block to penetrate into a tank of water at one end, and the near-shore seabed is modelled by an inclined section with a constant slope. Then, the SPH model is applied to simulate the three-dimensional flows around different types of houses under the action of a solitary wave. it has been found that the tsunami-resistant house design reduces the impact force by a factor of three.

关键词： solitary waves tsunami wave impact coastal structures SPH

High-intensity laser-driven secondary radiation sources using the ZEUS 45 TW laser system at the institute of Plasma Physics and Lasers of the Hellenic Mediterranean University Research Centre

在线全文

学校读者我要写书评

暂无评论

High Power Laser Science and Engineering 2021年第4期9卷 70-85页

作者： E.L.Clark A.Grigoriadis S.Petrakis i.Tazes G.Andrianaki A.Skoulakis Y.Orphanos E.Kaselouris i.Fitilis J.Chatzakis E.Bakarezos V.Dimitriou E.P.Benis N.A.Papadogiannis M.Tatarakis institute of Plasma Physics and Lasers Hellenic Mediterranean University Research Centre74100 RethymnoGreece Department of Physics University of Ioannina45110 IoanninaGreece Department of Electronic Engineering Hellenic Mediterranean University73133 ChaniaGreece School of Production Engineering and Management Technical University of Crete73100 ChaniaGreece Department of Music Technology and Acoustics Hellenic Mediterranean University74133 RcthymnoGreece

The rapid development of high-intensity laser-generated particle and photon secondary sources has attracted widespread interest during the last 20 years not only due to fundamental science research but also because of the important applications of this developing *** instance,the generation of relativistic particle beams,betatron-type coherent X-ray radiation and high harmonic generation have attracted interest from various fields of science and technology owing to their diverse applications in biomedical,material science,energy,space,and security *** the field of biomedical applications in particular,laser-driven particle beams as well as laser-driven X-ray sources are a promising field of *** article looks at the research being performed at the institute of Plasma Physics and Lasers(iPPL)of the Hellenic Mediterranean University Research *** recent installation of the ZEUS 45 TW laser system developed at iPPL offers unique opportunities for research in laser-driven particle and X-ray *** article provides information about the facility and describes initial experiments performed for establishing the baseline platforms for secondary plasma sources.

关键词： high power laser laser plasma secondary sources

EXPERiMENTS ON FLOW AROUND A CYLiNDER iN A SCOURED CRANNEL BED

在线全文

学校读者我要写书评

暂无评论

international Journal of Sediment Research 2001年第4期 431-444页

作者： i. iSTiARTO and W.H. GRAF 1 Res. Asst., Lab. de recherches hydrauliques, Ecole Polytechnique Federale, Lausanne, Switzerland. E-mail: adhy.kurniawan@epfl.ch or istiarto@tsipil.ugm.ac.id 2 Prof, Lab. de recherches hydrauliques, Ecole Polytechnique Federal

The flow pattern around a cylinder, installed in a scourd channel bed, was experimentally investigated. Detailed measurements of the instantaneous 3D velocities were performed by using an Acoustic Doppler Velocity Profiler (ADVP), from which the profiles of the time~averaged velocities and turbulence stresses were obtained. it is shown that the influence of thC cylinder and of the scour hole alters the approach flow; this is essentially confined to the viciulty of the cylinder and to the inside of the scour hole. The horseshoe vortex is measured as a flow reversal inside the scour hole, formed by the downward flow along the cylinder face and the reversed flow at the scour bed.

关键词： Open channel flow Flow around cylinder Local scour Experiments