检索结果-南通市图书馆

Geochemistry and mineralogy of beach sediments in the nor.hern Gulf of Mexico,Tamaulipas state,Mexico:implication for provenance

引用

Journal of Palaeogeography 2024年第3期13卷 375-400页

作者： Mayank Shukla Sanjeet K.Verma Mayla A.ramos-Vázquez John S.Armstrong-Altrin karla r.hernández-mart.nez Sumit Mishra Vivek P.Malviya Héctor.hernández-Mendoza Posgrado de la Division de Geociencias Aplicadas Instituto Potosino de Investigacion Científica y Tecnologica(IPICYT)Camino a la Presa San José2055San Luis Potosí78216Mexico Division de Geociencias Aplicadas Instituto Potosino de Investigación Científica y Tecnologica(IPICYT)Camino a la Presa San Jose 2055San Luis Potosí78216Mexico Universidad Nacional Autonoma de México Instituto de Ciencias del Mar y LimnologíaUnidad de ProcesosOceanicos y CosterosCiudad UniversitariaCiudad de México 04510Mexico Department of Marine Sciences Bharathidasan UniversityTiruchirappalli620024Tamil NaduIndia Instituto de Geociencias Universidad Nacional Autonoma de MéxicoBoulevard Juriquilla 300176230JuriquillaQueretaroMexico Department of Applied Geology Dr.Harisingh Gour Central UniversitySagar470002Madhya PradeshIndia Instituto de Investigacion de Zonas Desérticas Universidad Autònoma de San Luis PotosíAltair 200CP 78377San LuisS.L.P.Mexico Universidad del Centro de Mexico Capitán Caldera 75CP 78250San LuisS.L.P.Mexico

Geochemical and mineralogical studies were performed in the La Pesca(LP)and Tesoro Altamira(TA)beach sediments,located in the Tamaulipas state,nor.hern Gulf of *** main aim of this study is to infer the weathering history and provenance and to discriminate the tectonic environment of the beach *** sediments are composed of quartz with small amounts of accessory minerals such as plagioclase,calcite,orthoclase,microcline,and *** beach sediments are classified as fine-grained and very well sorted,however LP has coarse skewed and leptokurtic sediments,whereas TA has fine-skewed and very leptokurtic *** chemical index of weathering(CIW’)indicates intense weathering in the source *** quartz grain microtextures in the LP and TA are classified into mechanical,chemical,and mechanical/chemical *** features such as fractures,pits,percussion marks,abrasion fatigue,and V-shaped marks favor high-energy littoral,fluvial,subaqueous-marine,and aeolian *** chemical features indicate solution pits and crystalline overgrowth,which suggests a silica saturated marine *** mechanical/chemical features display adhering particles and elongated depressions suggest formation in a sub-aqueous nearshore marine *** and trace elements-based provenance discrimination diagrams indicate a felsic source derived from the Mesa Central(MC),Sierra Madre Oriental(SMOr)and Oaxaquia *** major and trace element concentrations imply a passive margin setting for the nor.hern Gulf of Mexico,which is consistent with the general geology.

关键词： Beach sediments Geochemistry Mineralogy Provenance Tamaulipas Tectonic setting

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

The protein-protein interaction landscape of transcription factors during gynoecium development in Arabidopsis

引用

Molecular Plant 2023年第1期16卷 260-278页

作者： Humberto Herrera-Ubaldo Sergio E.Campos Pablo López-Gómez Valentín Luna-García Víctor M.Zúñiga-Mayo Gerardo E.Armas-Caballero karla L.González-Aguilera Alexander DeLuna Nayelli Marsch-mart.nez Carlos Espinosa-Soto Stefan de Folter Unidad de Genómica Avanzada(UGA-LANGEBIO) Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional(CINVESTAV-IPN)IrapuatoGuanajuato 36824México Departamento de Biotecnología y Bioquímica Unidad IrapuatoCINVESTAV-IPNIrapuatoGuanajuato 36824México Instituto de Física Universidad de San Luis PotosíSan Luis PotosíSLP 78290México Present address:Department of Plant Sciences University of CambridgeCambridgeUK Present address:Department of Molecular and Cellular Biology University of California DavisDavisCAUSA Present address:CONACYT Instituto de FitosanidadColegio de PostgraduadosCampus MontecilloTexcocoMéxico

Flowers are composed of organs whose identity is defined by the combinatorial activity of transcription factors(TFs).The interactions between MADS-box TFs and protein complex formation have been schematized in the floral quartet model of flower *** gynoecium is the flower’s female reproductive part,crucial for fruit and seed production and,hence,for reproductive *** the establishment of carpel identity,many tissues arise to form a mature *** have been described as regulators of gynoecium development,and some interactions and complexes have been ***,broad knowledge about the interactions among these TFs and their participation during development remains *** this study,we used a systems biology approach to understand the formation of a complex reproductive unit—as the gynoecium—by mapping binary interactions between well-characterized *** analyzed almost 4500 combinations and detected more than 250 protein-protein interactions(PPIs),resulting in a process-specific interaction *** analyses suggest hidden functions and novel roles for many *** addition,we observed a close relationship between TFs involved in auxin and cytokinin-signaling pathways and other ***,we analyzed the network by combining PPI data,expression,and genetic data,which helped us to dissect it into several dynamic spatio-temporal subnetworks related to gynoecium development ***,we generated an extended PPI network that predicts new players in gynoecium *** together,all these results serve as a valuable resource for the plant community.

关键词： interactome networks transcription factors gynoecium development

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

Microstructure and Properties Characterization of WC-Co-Cr Thermal Spray Coatings

引用

Journal of Minerals and Materials Characterization and Engineering 2018年第4期6卷 482-497页

作者： karla Ofelia Méndez-Medrano Cecilio Jesús mart.nez-González Francisco Alvarado-hernández Omar Jiménez Víctor Hugo Baltazar.hernández Haideé ruiz-Luna Unidad Académica de Ingeniería Universidad Autónoma de Zacatecas Zacatecas México CUCEI Universidad de Guadalajara Jalisco México Unidad Académica de Ingeniería CONACYT-Universidad Autónoma de Zacatecas Zacatecas México

WC-Co-Cr coatings are widely employed due to their improved wear resistance and mechanical properties, however, the properties and performance of these coatings are compromised by the processing parameters of each spraying technique. Therefore, this study is aimed to evaluate and determine the effect of the deposition parameters on the properties and microstructural characteristics of WC-Co-Cr coatings using a more economical thermal spray technique. In particular, the influence of flame spray parameters on the microstructure, crystal structure, hardness, and sliding wear resistance of WC- Co-Cr coatings was examined. Two parameters were considered: Type of flame (reducing, neutral and oxidizing), and the spray torch nozzle exit area. results indicated that WC particles undergo considerable degree of decarburization and dissolution during spraying, showing substantial amounts of W2C, W, and Co3W3C, for all the considered conditions. However, the extent of phase transformation depended largely on the flame chemistry. The microstructure of the coatings was mainly affected by the spray nozzle. regarding the sliding wear behavior, the coatings with uniform distribution of hard particles provided the best wear resistance. The decomposition of WC into W2C phase seems to have meaningless significance in the mass loss, nevertheless, the WC phase transformation to metallic tungsten and η-phase (Co3W3C) produce higher wear rates due to deficiency of carbide particles and embrittlement of the binder phase which induces cracking and delamination of the splats.

关键词： WC-Co-Cr Thermal Spray Coating X-ray Phase Content Microstructure Flame

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

Intertwined leukocyte balances in tumours and peripheral blood as robust predictors of right and left colorectal cancer survival

引用

World Journal of Gastrointestinal Oncology 2022年第1期14卷 295-318页

作者： ramón Cantero-Cid karla Marina Montalbán-hernández Jenny Guevara Alejandro Pascual-Iglesias Elisa Pulido JoséCarlos Casalvilla Cristóbal Marcano Cristina Barragán Serrano Jaime Valentín Gloria Cristina Bonel-Pérez JoséAvendaño-Ortiz Verónica Terrón roberto Lozano-rodríguez Alejandro martín-Quirós Elvira Marín Eva Pena Laura Guerra-Pastrián Eduardo López-Collazo Luis Augusto Aguirre Tumor Immunology Laboratory The Innate Immune Response GroupHospital La Paz Institute for Health Research(IdiPAZ)Madrid 28046Spain Digestive Surgery Service La Paz University HospitalMadrid 28046Spain Emergency Department and Emergent Pathology research Group Hospital La Paz Institute for Health Research(IdiPAZ)Madrid 28046Spain Pathologic Anatomy Service Hospital La PazMadrid 28046Spain

BACKGrOUND Colorectal cancer(CrC)accounts for 9.4%of overall cancer deaths,ranking second after lung *** the large number of factors tested to predict their outcome,most patients with similar variables show big differences in ***,right-sided CrC(rCrC)and left-sided CrC(LCrC)patients exhibit large differences in outcome after surgical intervention as assessed by preoperative blood leukocyte *** hypothesised that stronger indexes than circulating(blood)leukocyte ratios to predict rCrC and LCrC patient outcomes will result from combining both circulating and infiltrated(tumour/peritumour fixed tissues)concentrations of *** To seek variables involving leukocyte balances in peripheral blood and tumour tissues and to predict the outcome of CrC *** Sixty-five patients diagnosed with colon adenocarcinoma by the Digestive Surgery Service of the La Paz University Hospital(Madrid,Spain)were enrolled in this study:43 with rCrC and 22 with *** were followed-up from January 2017 to March 2021 to record overall survival(OS)and recurrence-free survival(rFS)after surgical *** concentrations in peripheral blood were determined by routine laboratory ***-fixed samples of tumour and peritumoural tissues were assessed for leukocyte concentrations by immunohistochemical detection of CD4,CD8,and CD14 marker *** of leukocyte concentration in blood and tissues were calculated and evaluated for their predictor values for OS and rFS with Spearman correlations and Cox univariate and multivariate proportional hazards regression,followed by the calculation of the receiver-operating characteristic and area under the curve(AUC)and the determination of Youden’s optimal cutoff values for those variables that significantly correlated with either rCrC or LCrC patient *** patients from the cohort were randomly assigned to modelling and validation sets,and clinician-friendly nomogra

关键词： Left colorectal cancer Leukocyte ratios Prognostic variables recurrence-free survival right colorectal cancer Overall survival

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

Study and Characterization of （KxSr1-x）CrOz, x = 0.10-0.50System

引用

材料科学与工程（中英文B版） 2018年第4期8卷 150-160页

作者： Gustavo Antonio Jiménez-García Elizabeth Chavira Jesús Arenas Adriana Tejeda karla Eriseth Moralesreyes Josué Esaú romero-Ibarra Jorge Barreto Institute of Materials research National Autonomous University of Mexico Mexico City 04510 Mexico Faculty of Chemistry National Autonomous University of Mexico Mexico City 04510 Mexico Institute of Physics National Autonomous University of Mexico Mexico City 04510 Mexico

Studies of thermodynamic, electric and magnetic properties were conducted on the （KxSr1-x）CrOz, x = 0.10, 0.15 and 0.50system; adjusted for different crystal sizes （polycrystalline, nano-crystalline and single crystals）. For polycrystals, a solid-statereaction method was used （room temperature, Tr, up to 665 °C）. Nano-crystals, a crushing technique with a mechanical mortar wereprocessed at Tr. Single crystals were acquired, through fusion method starting from polycrystals pre-manufactured （665 °C） over900 °C. For the methods described above, they all were worked at atmospheric pressure. Studying the thermodynamic in the crystalsmixture were obtained by TGA （thermogravimetric analysis） and DSC （differential scanning calorimetry）. Powder XrD （X-raydiffraction） in the manual grinding mixture a SrCO3 solid solution, at Tr was detected. When increasing the temperature, a solidsolution of K2Sr（CrO4）2 is formed. By HrTEM （high-resolution transmission electronic microscope）, crystal sizes 4-12 nm were seen.（K0.50Sr0.50）CrOz composition presents a weak ferromagnetic and an insulating behavior.

关键词： Solid-state reaction solid solutions TGA-DSC XrD HrTEM magnetic behavior

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

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

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

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：