检索结果-南通市图书馆

Approach to traumatic cardiac arrest in the emergency department: a narrative literature review for emergency providers

引用

World Journal of Emergency medicine 2024年第1期15卷 3-9页

作者： rashed Alremeithi Quincy K.Tran megan T.quintana Soroush Shahamatdar Ali Pourmand Department of Emergency medicine George Washington University School of Medicine and Health SciencesWashington DC 20037USA Department of Emergency medicine University of Maryland School of MedicineBaltimore 21201USA Program in Trauma the R Adams Cowley Shock Trauma CenterUniversity of Maryland School of MedicineBaltimore 21201USA Center for Trauma and Critical Care Department of Surgerythe George Washington University School of Medicine&Health SciencesWashington DC 20037USA

BACKGrOUND:Traumatic cardiac arrest(TCA)is a major contributor to m.r.ality and morbidity in all age groups and poses a significant burden on the healthcare *** there have been advances in treatment modalities,survival rates for TCA patients remain *** narrative literature review critically examines the indications and eff ectiveness of current therapeutic approaches in treating ***:We performed a literature search in the Pubmed and Scopus databases for studies published before December 31,*** search was refi ned by combining search terms,examining relevant study references,and restricting publications to the English *** the search,943 articles were retrieved,and two independent reviewers conducted a screening ***:A review of various studies on pre-and intra-arrest prognostic factors showed that survival rates were higher when patients had an initial shockable *** were conflicting results regarding other prognostic factors,such as witnessed arrest,bystander cardiopulmonary resuscitation(CPr),and the use of prehospital or in-hospital *** thoracotomy was found to result in more favorable outcomes in cases of penetrating trauma than in those with blunt *** endovascular balloon occlusion of the aorta(rEBOA)provides an advantage to emergency thoracotomy in terms of occupational safety for the operator as an alternative in managing hemorrhagic *** implemented in the setting of aortic occlusion,emergency thoracotomy and rEBOA resulted in comparable m.r.ality ***-venous extracorporeal life support(V-V ECLS)and veno-arterial extracorporeal life support(V-A ECLS)are viable options for treating respiratory failure and cardiogenic shock,*** the context of traumatic injuries,V-V ECLS has been associated with higher rates of survival to discharge than V-A ***:TCA remains a signifi cant challenge for emergency medical services due to its high m

关键词： Traumatic cardiac arrest Emergency thoracotomy resuscitative endovascular balloon occlusion of the aorta

来源：

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

Triboelectric nanogenerator based on electrodeposited Ag octahedral nano-assemblies

引用

能源化学:英文版 2023年第8期83卷 478-495,I0012页

作者： m.Edith Navarro-Segura m.r.arita Sanchez-Dominguez Ana Arizmendi-morquecho J.Alvarez-quintana Group of Colloidal and Interfacial Chemistry Applied to Nanomaterials and Nanoformulations Centro de Investigacion en Materiales Avanzados S.C Unidad MonterreyAlianza Norte#202Autopista Monterrey-Aeropuerto Km.10.C.P.66628 ApodacaNuevo LeonMexico GENES-Group of Embedded Nanomaterials for Energy Scavenging Centro de Investigacion en Materiales Avanzados S.C.Unidad MonterreyAlianza Norte#202Autopista Monterrey-Aeropuerto Km.10.C.P.66628 ApodacaNuevo LeonMexico

The tremendous potential of triboelectric generators-TENGs for converting mechanical energy into electrical energy places them as one of the most promising energy harvesting technologies. In this work, the fabrication of enhanced performance TENGs using Ag octahedron nano-assemblies on ITO as electrodes significantly increases the electric charge collection of the induced tribocharges. Thereby, nanostructured electrical contacts coated with Ag macroscale nano-assemblies with octahedral features were obtained by the electrodeposition technique on flexible PET/ITO substrates. Consequently, the nanostructured triboelectric generator-TENG exhibited 65 times more maximum output power, and almost 10 times more open circuit output voltage than that of a TENG with non-nanostructured contacts passing from μW to m W capabilities, which was attributed to the increment of intrinsic interface states due to a higher effective contact area in the former. Likewise, output performances of TENGs also displayed an asymptotic behavior on the output voltage as the operating frequency of the mechanical oscillations increased, which is attributed to a decrement in the internal impedance of the device with frequency. Furthermore, it is shown that the resulting electrical output power can successfully drive low power consumption electronic devices. On that account, the present research establishes a promising platform which contributes in an original way to the development of the TENGs technology.

关键词： Triboelectric generator Nanostructured electrodeposited electrodes Ag octahedral nanoassemblies Electrode surface structure

来源：

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

3D printing of ABS *** of processing and effects of multi-wall and single-wall carbon nanotubes on thermal,mechanical and electrical properties

引用

Journal of materials Science & Technology 2022年第26期121卷 52-66页

作者： Sithiprumnea Dul Brenda J.Alonso Gutierrez Alessandro Pegoretti Jaime Alvarez-quintana Luca Fambri Department of Industrial Engineering and INSTm research Unit University of TrentoTrento 38123Italy Centro de Investigación en Materiales Avanzados S.C.Unidad MonterreyApodaca 66600Mexico Facultad de Ingeniería mecánica y Eléctrica Universidad Autónoma de Nuevo LeónAvenida Universidad s/nCiudad UniversitariaSan Nicolás de los Garza 66451México

The following paper reports on a comparative study of the effects of two types of carbon nanotubes,namely multiwall(mWCNT)and single-wall(SWCNT)carbon nanotube,on the properties of 3D-printed parts produced with acrylonitrile-butadiene-styrene(ABS)nanocomposites with various CNT loadings of5-10 wt.%.Quasi-static tensile properties and Vicat softening temperature of 3D-printed parts were enhanced with the increasing CNT *** highest enhancement in tensile properties was observed for the ABS/CNT nanocomposites at 10 wt.%filler loading.3D-printed ABS/SWCNT composites showed higher tensile modulus,better creep stability and higher Vicat ***,the strength of ABS/SWCNT 3D samples is relatively lower than that of ABS/*** addition,3D-printed parts exhibited anisotropic electrical conductive behaviour,which has a conductivity of through-layer of about2-3 orders of magnitude higher than *** highest conductivity of 3D-printed samples reached25.2 S/m,and 9.3 S/m for ABS/mWCNT and ABS/SWCNT composites at 10 wt.%,*** results obtained,*** successful fuse filament fabrication and the consequent electromechanical properties,confirm that these 3D printable nanocomposite could be properly utilized for the production,and application up to about 90°C,of thermoelectric devices and/or resistors for flexible circuits.

关键词： Fuse filament fabrication Conductive polymers Nanocomposites mechanical properties Creep behavior resistivity

来源：

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

Ultrafine Grained HSLA Steels for Cold Forming

引用

Journal of Iron and Steel research(International) 2010年第10期17卷 50-56页

作者： r González J O García m A Barbés m J quintana L F Verdeja J I Verdeja School of Engineering Panamerican University ETSImO Oviedo University

The industrial level production of ultrafine grained （or ultrafine ferrite） ferrous alloys was investigated through three examples of steels that complied with the EN 10149-2 Euronorm and were produced by advanced con- trolled hot rolling techniques. The steel samples were tension tested and chemically analyzed, and the microstructure was evaluated through quantitative metallographic techniques to determine parameters such as yield stress, amount of microalloying elements, strain hardening coefficient, grain size, and grain size distribution. These steels were micro- alloyed with Ti, Nb, and mn with ASTm grain sizes of approximately 13--15. The careful control of chemical com- position and deformation during production, giving a specific attention to the deformation sequences, austenite non- reerystallization temperatures and allotropic transformations during cooling, are indispensable to obtain steels with an adequate strain hardening coefficient that allows cold working operations such as bending, stretching or drawing.

关键词： ultrafine steel metallography strain hardening Euronorm

来源：

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

Structural Ultrafine Grained Steels Obtained by Advanced Controlled rolling

引用

Journal of Iron and Steel research(International) 2013年第1期20卷 62-70页

作者： r González J O García m A Barbés m J quintana L F Verdeja J I Verdeja School of Engineering Panamerican UniversityMexico City 03920Mexico E T S I m O Oviedo UniversityOviedo 33004Spain

Steels with ultrafine grains （lower than 5 μm）, which usually known as ultrafine ferrite or ultrafine grained materials, are presently the object of intense research, because of the improvement in resistance and fracture toughness they may reach compared to conventional steels （with grain sizes above this value）. It is shown that the forenamed steels designated in the Euronorm EN 10149-2, which are manufactured by advanced techniques of controlled rolling and mainly used in automotive industry, have an ultrafine grain size in the range of 2.5 to 3.5 μm, and with elastic yield stresses higher than 400 mPa. Based on the morrison-miller criterion, it is shown that values of the strain-hardening coefficient lower than 0.08 would make the industrial application of these steels unfeasible.

关键词： ultrafine grained steel mechanical property manufacturability strain-hardening

来源：

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

Split-root systems applied to the study of the legume-rhizobial symbiosis: What have we learned?

引用

Journal of Integrative Plant Biology 2014年第12期56卷 1118-1124页

作者： Estíbaliz Larrainzar Erena Gil-quintana Cesar Arrese-Igor Esther m.González Daniel marino Department of Environmental Sciences Public University of Navarra Pamplona E-31006 Spain Department of Plant Biology and Ecology University of the Basque Country UPV/EHU Bilbao E-48080 Spain Ikerbasque Basque Foundation for Science Bilbao E-48011 Spain

Split-root system（SrS） approaches allow the differential treatment of separate and independent root systems, while sharing a common aerial part. As such, SrS is a useful tool for the discrimination of systemic（shoot origin）versus local（root/nodule origin） regulation mechanisms. This type of approach is particularly useful when studying the complex regulatory mechanisms governing the symbiosis established between legumes and rhizobium bacteria. The current work provides an overview of the main insights gained from the application of SrS approaches to understand how nodule number（nodulation autoregulation） and nitrogen fixation are controlled both under non-stressful conditions and in response to a variety of stresses. Nodule number appears to be mainly controlled at the systemic level through a signal which is produced by nodule/root tissue, translocated to the shoot, and transmitted back to the root system, involving shoot Leu-rich repeat receptor-like kinases. In contrast, both local and systemic mechanisms have been shown to operate for the regulation of nitrogenase activity in nodules. Under drought and heavy metal stress, the regulation is mostly local,whereas the application of exogenous nitrogen seems to exert a regulation of nitrogen fixation both at the local and systemic levels.

关键词： legume-rhizobia nitrogen fixation nodulation split-root system symbiosis

来源：

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

Less common etiologies of exocrine pancreatic insufficiency

引用

World Journal of Gastroenterology 2017年第39期23卷 7059-7076页

作者： Vikesh K Singh mark E Haupt David E Geller Jerry A Hall Pedro m quintana Diez Division of Gastroenterology Johns Hopkins University School of MedicineBaltimoreMD 21287United States medical Affairs AbbVie Inc.North ChicagoIL 60064United States Cystic Fibrosis Clinical Development AbbVie Inc.North ChicagoIL 60064United States CrEON^(█) Clinical Development AbbVie Inc.North ChicagoIL 60064United States CrEON^(█) Development AbbVie Inc.North ChicagoIL 60064United States

Exocrine pancreatic insufficiency(EPI), an important cause of maldigestion and malabsorption, results from primary pancreatic diseases or secondarily impaired exocrine pancreatic function. Besides cystic fibrosis and chronic pancreatitis, the most common etiologies of EPI, other causes of EPI include unresectable pancreatic cancer, metabolic diseases(diabetes); impaired hormonal stimulation of exocrine pancreatic secretion by cholecystokinin(CCK); celiac or inflammatory bowel disease(IBD) due to loss of intestinal brush border proteins; and gastrointestinal surgery(asynchrony between motor and secretory functions, impaired enteropancreatic feedback, and inadequate mixing of pancreatic secretions with food). This paper reviews such conditions that have less straightforward associations with EPI and examines the role of pancreatic enzyme replacement therapy(PErT). relevant literature was identified by database searches. most patients with inoperable pancreatic cancer develop EPI(66%-92%). EPI occurs in patients with type 1(26%-57%) or type 2 diabetes(20%-36%) and is typically mild to moderate; by definition, all patients with type 3 c(pancreatogenic) diabetes have EPI. EPI occurs in untreated celiac disease(4%-80%), but typically resolves on a gluten-free diet. EPI manifests in patients with IBD(14%-74%) and up to 100% of gastrointestinal surgery patients(47%-100%; dependent on surgical site). With the paucity of published studies on PErT use for these conditions, recommendations for or against PErT use remain ambiguous. The authors conclude that there is an urgent need to conduct robust clinical studies to understand the validity and nature of associations between EPI and medical conditions beyond those with proven mechanisms, and examine the potential role for PErT.

关键词： Celiac disease Inflammatory bowel disease Exocrine pancreatic insufficiency malabsorption Epidemiology Pancreas Pancreatic cancer Secretion/absorption Surgery

来源：

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

Diversity patterns, environmental drivers and changes in vegetation composition in dry inter-Andean valleys

引用

Journal of Plant Ecology 2017年第3期10卷 461-475页

作者： Catalina quintana marco Girardello Anders S.Barfod Henrik Balslev Department of Bioscience Ecoinformatics and Biodiversity GroupAarhus UniversityNy Munkegade 114DK-8000 Aarhus CDenmark Departamento de Ciencias Biológicas Pontificia Universidad Católica del EcuadorAv.12 de Octubre 1076Apartado postal 17012184QuitoEcuador

Aims We studied diversity,patterns of endemism and turnover of veg-etation composition in dry inter-Andean valleys(DIAVs)where lit-tle is known about the influence of the abiotic drivers controlling plant species composition and occurrences,and the life forms that contribute most toα-andβ-diversity,*** study was focused on DIAVs located in the highlands(800-2800 m)around the Equator(1°N-5°S).The following questions were addressed:(i)what differences exist between endemic and non-endemic species in terms of species number,frequency and abundance?(ii)are pat-terns ofα-andβ-diversity correlated with latitude?(iii)what are the major environmental drivers controlling spatial patterns in species composition and occurrence?methods We established 63 transects of 5×100 m in areas with DIAV vegetation,impacted as little as possible by human *** each transect,all mature trees and shrubs were identified and counted to determine their *** coverage of terrestrial herbs was *** additive models were used to quantify the relationship betweenα-andβ-diversity with *** recordα-diversity,we used the exponential Shannon *** Sørensen index was used to measureβ-diversity or species *** used canonical correspondence analysis to deter-mine species composition and generalized linear mixed models to quantify simultaneously the determinants of species occur-rence across species and *** models were evaluated using the Akaike information *** analyses were run separately for trees,herbs and *** Findings Overall,we found that shrubs was the most diverse life form,constituting 43%(12%endemic)of the 313 species,followed by herbs(36%;11.5%endemic)and trees(20%;5%endemic).Trees comprise mostly species with low abundance(e.g.rue for herbs,whereas shrubs showed a larger number of abundant species(>30 individuals ha^(−1)),includ-ing four endemic *** of the e

关键词： endemics α-diversity β-diversity life forms Ecuador

来源：

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

The aryl hydrocarbon receptor and the gut–brain axis

引用

Cellular & molecular Immunology 2021年第2期18卷 259-268页

作者： Andreia Barroso João Vitor mahler Pedro Henrique Fonseca-Castro Francisco J.quintana Ann romney Center for Neurologic Diseases Brigham and Women’s HospitalHarvard Medical SchoolBostonMAUSA Faculdade de medicina FmUSP Universidade de São PauloSão PauloSPBrazil Broad Institute of mIT and Harvard CambridgeMAUSA

The aryl hydrocarbon receptor(AHr)is a ligand-activated transcription factor initially identified as the receptor for *** half a century after its discovery,AHr is now recognized as a receptor for multiple physiological ligands,with important roles in health and *** this review,we discuss the role of AHr in the gut–brain axis and its potential value as a therapeutic target for immune-mediated diseases.

关键词： Aryl hydrocarbon receptor Autoimmune diseases Infectious diseases cancer

来源：

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

Effect of inductively coupled plasma surface treatment on silica gel and mesoporous mCm-41 particles

引用

Plasma Science and Technology 2018年第6期20卷 104-113页

作者： J A JUArEZ-mOrENO U CHACON-ArGAEZ J BArrON-ZAmBrANO C CArrErA-FIGUEIrAS P quintana-OWEN W TALAVErA-PECH Y PErEZ-PADILLA A AVILA-OrTEGA facultad de ingeniería química-uady periférico norte kilómetro 33.5col.chuburna de hidalgo inn C.P. 97203 Mérida Yucatan México centro de investigación y de estudios avanzados del ipn-unidad mérida km.6 antigua carretera a progreso apdo. Postal 73 Cordemex 97310 Méfida Yucatán México

Silica gel and mCm-41 synthesized mesoporous materials were treated with either oxygen（O_2）,hexamethyldisiloxane（HmDSO） and organic vapors like ethanol（Et OH）,and acrylonitrile（AN）inductive *** radiofrequency power for the modification was fixed to 120 W and30 min,assuring a high degree of organic ionization energy in the *** surface properties were studied by infrared spectroscopy（FTIr）,scanning electron microscopy,x-ray photoelectron spectroscopy and dynamic light scattering technique was used for characterizing size *** the silica and mCm-41 particles were modified by AN and HmDSO plasma gases,the surface morphology of the particles was changed,presenting another color,size or *** contrast,the treatments of oxygen and Et OH did not affect the surface morphology of both particles,but increased the oxygen content at the surface bigger than the AN and HmDSO plasma *** this study,we investigated the influence of different plasma treatments on changes in morphology and the chemical composition of the modified particles which render them a possible new adsorbent for utilization in sorptive extraction techniques for polar compounds.

关键词： silica mCm-41 nanoparticles plasma treatment

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：