检索结果-南通市图书馆

Rheological and stability analysis of cement pastes incorporating silica-based wastes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Particuology 2024年第6期89卷 144-152页

作者： Julia da rosa Martins Janaíde Cavalcante Rocha Dachamir Hotza Luciano Senff Graduate Program in Materials Science and Engineering(PPGMAT) Federal University of Santa Catarina(UFSC)Florianópolis88040-900SCBrazil Graduate Program in Civil Engineering(PPGEC) Federal University of Santa Catarina(UFSC)Florianópolis88040-900SCBrazil Graduate Program in Chemical Engineering(POSENQ) Federal University of Santa Catarina(UFSC)Florianópolis88040-900SCBrazil Department of Mobility Engineering Federal University of Santa Catarina(UFSC)Joinville89219-600SCBrazil

This study investigates the influence of waste characteristics,especially zeta potential,on the properties of cement pastes and *** focus is to evaluate the impact of the zeta potential of cement particles and waste materials on the sedimentation speed,rheology,and hardening time of stabilized cement *** Cement II F 40,retarder additive,silica,and fly ash were used in the *** pastes were prepared,and during the stabilization period,their rheological properties and pH were *** zeta potential and sedimentation speed of the cement and waste particles were measured at the pH that the pastes presented during the entire stabilization *** the stabilization period,the pastes were subjected to the hardening time *** zeta potential analyses revealed diverse values for the different powder types,with the cement particles exhibiting a zeta potential of−3.0 mV,the silica particles exhibiting−10.5 mV,and the fly ash particles exhibiting−20.3 *** influence of the high zeta potential modulus was observed on the sedimentation speed,with the solution containing fly ash exhibiting a speed of 40.01μm/s,whereas the solution containing only cement exhibited a speed of 99.38μm/*** the pastes,the results indicate that the presence of fly ash particles with a significantly negative zeta potential led to a 16%reduction in hardening time compared to particles with a lower modulus of zeta *** tests showed that the inclusion of fly ash particles prevented the formation of *** the zeta potential influenced agglomerate formation and hardening time,it was found to have no effect on yield stress or viscosity.

关键词： Wastes Zeta potential Setting time Rheometry

Non-invasive assessment of liver fibrosis in patients with alcoholic liver disease

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 2015年第39期21卷 11044-11052页

作者： rosa Lombardi Elena Buzzetti Davide Roccarina Emmanuel A Tsochatzis Sheila Sherlock Liver Unit and UCL Institute for Liver and Digestive Health Royal Free Hospital and UCL

Alcoholic liver disease(ALD) consists of a broad spectrum of disorders, ranging from simple steatosisto alcoholic steatohepatitis and cirrhosis. Fatty liver develops in more than 90% of heavy drinkers, however only 30%-35% of them develop more advanced forms of ALD. Therefore, even if the current "gold standard" for the assessment of the stage of alcohol-related liver injury is histology, liver biopsy is not reasonable in all patients who present with ALD. Currently, although several non-invasive fibrosis markers have been suggested as alternatives to liver biopsy in patients with ALD, none has been sufficiently validated. As described in other liver disease, the diagnostic accuracy of such tests in ALD is acceptable for the diagnosis of significant fibrosis or cirrhosis but not for lesser fibrosis stages. Existing data suggest that the use of noninvasive tests could be tailored to first tier screening of patients at risk, in order to diagnose early patients with progressive liver disease and offer targeted interventions for the prevention of decompensation. We review these tests and critically appraise the existing evidence.

关键词： Transient elastography Cirrhosis Prognosis Histolo

A High-Order Localized Artificial Diffusivity Scheme for Discontinuity Capturing on 1D Drift-Flux Models for Gas-Liquid Flows

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Applied Mathematics and Mechanics 2024年第1期16卷 47-74页

作者： Adyllyson H.Nascimento Eugenio S.rosa Department of Energy School of Mechanical EngineeringUniversity of CampinasCampinasBrazil

A computational code is developed for the numerical solution of onedimensional transient gas-liquid flows using drift-flux models,in isothermal and also with phase change *** these two-phase models,classical upwind schemes such as Roe-and Godunov-type schemes are generally difficult to derive and expensive to use,since there are no treatable analytic expressions for the Jacobian matrix,eigenvalues and eigenvectors of the system of *** the other hand,the highorder compact finite difference scheme becomes an attractive alternative on these occasions,as it does not make use of any wave propagation information from the system of *** present paper extends the localized artificial diffusivity method for high-order compact finite difference schemes to solve two-phase flows with *** numerical method has simple formulation,straightforward implementation,low computational cost and,most importantly,*** numerical methodology proposed is validated by solving several numerical examples given in the *** simulations are sixth-order accurate and it is shown that the proposed numerical method provides accurate approximations of shock waves and contact *** is an essential property for simulations of realistic mass transport problems relevant to operations in the petroleum industry。

关键词： Compressible two-phase flows drift-flux model localized artificial diffusivity highorder numerical methods

Ocular ultrasound evaluation of optic nerve sheath diameter in military environments

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Military Medical Research 2019年第3期6卷 272-274页

作者： Maddalena De Bernardo Livio Vitiello Palmiro Cornetta Nicola rosa Department of Medicine Surgery and Dentistry "Scuola Medica Salernitana" University of Salerno

In this letter to the Editor, we would like to comment on the article by Betcher et al., concerning the possibility of teaching military trainees to obtain accurate optic nerve sheath diameter measurements, using a brief didactic and a hands-on training session. In particular, this letter notes the importance of the measurement of optic nerve sheath diameter in detecting the eventual elevated intracranial pressure following traumatic brain injury, highlights several limitations in the use of B-scan for such a purpose and suggests a more accurate evaluation with the standardized A-scan.

关键词： Blooming effect Intracranial pressure Optic nerve sheath diameter

Francis Dov Por(1927–2014):A life dedicated to zoology remembered

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Integrative Zoology 2015年第2期10卷 230-231页

作者： rosa-Maria POLYMENI John BUCKERIDGE Michael SCHMITT Zhibin ZHANG University of Athens Greece RMIT University MelbourneVictoriaAustralia University of Greifswald Germany Institute of Zoology Chinese Academy of SciencesChina

On 25 October 2014,the International Society of Zoological Sciences(ISZS)family lost one of its most eminent members,Professor Francis Dov Por,who passed away at the age of *** was born on 25 May 1927,in Timișoara,a city that is now the capital city of Timis County and is considered the informal capital city of the historical region of Banat,*** obtained a Diploma in Biology in 1956 from the University of *** of his potential as a biologist was demonstrated through his early appointment as a Curator for the Grigore Antipa Museum of Natural History in Bucharest.

关键词： remember capital Fra

Positive frequency of autoantibodies in multiple sclerosis patients Are they associated with therapy?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2010年第4期5卷 257-260页

作者： Gerardo Iuliano Luigi Cinquanta Anna Maria Ferruzzi rosa Napoletano Azienda Ospedaliera Ospedali Riuniti di SalernoU.O.NeurologiaCentro Provinciale Sclerosi Multipla Azienda Ospedaliera Ospedali Riuniti di SalernoU.O.Laboratorio Patologia Clinica Azienda Ospedaliera Ospedali Riuniti di Salerno

BACKGROUND： Humoral autoimmunity in patients with multiple sclerosis is often asymptomatic and transient during interferon therapy. OBJECTIVE： To analyze the frequency of positivity to autoantibodies in multiple sclerosis patients and to clarify whether it is modified by immunomodulating therapy. DESIGN： A retrospective *** AND SE＇rrlNG： The study was performed at the Multiple Sclerosis Center, Department of Neurosciences, Salerno Hospital, Italy, between 2005 and 2007. PARTICIPANTS： A total of 169 multiple sclerosis patients were included, 57 males and 112 females Individuals were mainly outpatients and were usually tested yearly for autoantibodies. Patients with previous immunological diseases were excluded from statistical evaluation. METHODS： The frequency of positivity was calculated in patients grouped for gender, multiple sclerosis clinical parameters, magnetic resonance imaging features and disease modifying therapy. A total of 113 patients were treated with beta interferons. MAIN OUTCOME MEASURES： Frequency of positivity to any autoantibody. Prevalences and incidences were ***： The overall prevalence of autoantibodies within 3 years was 47.3%. In multiple sclerosis patients who were untreated or treated with drugs other than interferons, the prevalence was higher, and greater positivity to autoantibodies was seen in patients treated with interferons [odds ratio （95% confidence interval）, 2.87 （1.5 - 5.2）, P 〈 0.05 - 0.01]. Multiple regression analysis showed a significant association of the positivity to autoantibodies with interferon therapy, rather than gender, relapse or magnetic resonance imaging. CONCLUSION： Interferon therapy is associated with significantly higher frequency of autoantibodies in patients with multiple sclerosis. The differences among the therapies are not influenced by other variables such as gender or clinical pattern.

关键词： multiple sclerosis autoimmunity autoantibodies immunomodulation interferon

Multi-frequency satellite radar imaging of cultural heritage:the case studies of the Yumen Frontier Pass and Niya ruins in the Western Regions of the Silk Road Corridor

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

International Journal of Digital Earth 2016年第12期9卷 1224-1241页

作者： Fulong Chen Nicola Masini Jie Liu Jiangbin You rosa Lasaponara Key Laboratory of Digital Earth Science Institute of Remote Sensing and Digital EarthChinese Academy of SciencesHaidian DistrictBeijingPeople’s Republic of China International Centre on Space Technologies for Natural and Cultural Heritage under the Auspices of UNESCO Haidian DistrictBeijingPeople’s Republic of China Institute for Archaeological and Monumental Heritage National Research CouncilTito ScaloPZItaly Institute of Methodologies for Environmental Analysis National Research CouncilTito ScaloPZItaly

Synthetic Aperture Radar(SAR)remote sensing is increasingly favoured in archaeological ***,the effectiveness of this technology for archaeological prospection has so far not been fully *** this study,an integrated single-date and multi-temporal SAR data-processing chain was proposed to sharpen archaeological signs and hence their detection and *** total,14 scenes of X-band Cosmo-SkyMed,C-band Sentinel-1 and L-band PALSAR data covering the Western Regions of the Silk Road Corridor in China were employed for two important archaeological sites including the Yumen Frontier Pass with emerging archaeological traces and Niya ruins with subsurface *** results pointed out that single-date satellite radar data were useful for the identification of subsurface traces buried under desert in the landscape-scale,whereas for the identification of emerging monuments,Sentinel-1 was limited by its lower spatial resolution compared to TerraSAR and PALSAR ***-date products,such as interferometric coherence,the averaged radar signatures and RGB multi-temporal composites,were effective to sharpen archaeological traces as well as for change detection in Yumen Frontier *** study presents a pilot assessment of satellite SAR data for the analysis and monitoring of archaeological features in the predominantly arid-sandy environmental characteristic of investigated sites.

关键词： Archaeological prospection Silk Road SAR Yumen Frontier Pass Niya ruin iron age

Integrating fossils in a molecular-based phylogeny and testing them as calibration points for divergence time estimates in Menispermaceae

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 Systematics and Evolution 2011年第1期49卷 25-49页

作者： Frdric M.B. JACQUES rosa Del C. ORTIZ Department of Biodiversity and Biogeography Kunming Institute of Botany Chinese Academy of Sciences State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Sciences Missouri Botanical Garden St. Louis MO 63166-0299 USA

The phylogeny of extant Menispermaceae (Ranunculales) is reconstructed based on DNA sequences of two chloroplast genes (rbcL and atpB) from 94 species belonging to 56 genera. Fossilized endocarps represent 34 genera. The positions of these are inferred using 30 morphological characters and the molecular phylogeny as a backbone constraint. Nine of the thirteen nodes that are each dated by a fossil are used as calibration points for the estimates of molecular divergence times. BEAST is used to estimate stem age (121.2 Myr) and crown age (105.4 Myr) for Menispermaceae. This method does not require an input tree topology and can also account for rate heterogeneity among lineages. The sensitivity of these estimates to fossil constraints is then evaluated by a cross-validation procedure. The estimated origin for Menispermaceae is dated to the mid-Jurassic if the customary maximum age of 125 Myr for eudicots is not implemented. All constraints when used alone failed to estimate node ages in some parts of the tree. Fossils from the Palaeocene and Eocene impose strict constraints. Likewise, the use of Prototinomiscium as a dating constraint for Menispermaceae appears to be a conservative approach.

关键词： age calibration cross-validation fossil Menispermaceae molecular scaffold phylogeny.

Monocyte-secreted Wnt5a interacts with FZD5 in microvascular endothelial cells and induces angiogenesis through tissue factor signaling

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Molecular Cell Biology 2014年第5期8卷 380-393页

作者： Gemma Arderiu Sonia Espinosa Esther Pena rosa Aledo Lina Badimon Cardiovascular Research Center (CSIC-ICCC) Institut d'Investigaci6 Biomedica Sant Pau (llB-Sant Pau) and Universitat Autonoma de Barcelona (UAB)Barcelona 08025 Spain

Angiogenesis during reactive and pathologic processes is characteristically associated with inflammation. Inflammatory cells partici- pate in angiogenesis by secreting different molecules that affect endothelial celt functions. We had previously shown that induced tissue factor （TF） expression in activated rnicrovascular endothelial celts （rn EC） is able to induce angiogenesis via autocrine regulation. However, the signals that induce TF expression in mEC are not fully known. Here, we demonstrate that rnonocyte paracrine cross-talk with mECs triggers rnEC-TF expression. We have identified that rnonocyte-secreted Wnt5a induces TF expression in rnEC and function-ally induces celt rnonolayer repair and angiotube formation in vitro as well as rnicrovesset formation in vivo. Monocyte-secreted Wnt5a activates FZD5 in mECs, which signals to induce the release of intraceUular Ca2＋ and increase NFKB transcription activity and TF gene expression. In sum, WntSa secreted by monocytes signals through the noncanonical Wnt-FZD5 pathway in mECs to induce TF expression that induces angiogenesis by autocrine regulation.

关键词： wnt5a tissue factor microvascular endothelial cells monocytes angiogenesis