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Guest Editorial: Power Systems with Increasing Renewable Penetration: Market, Operations, Planning and Regulation

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journal of Modern Power Systems and Clean Energy 2021年第4期9卷 I0001-I0002页

作者： Antonio j.Conejo j.anhui Wang Angel Arcos vargas Ohio State University ColumbusOhioUSA Southern Methodist University DallasTexasUSA University of Seville SevilleSpain

Our goal in putting together this special section is to contribute to the conversation on control,operations,planning and regulation of power systems with increasing renewable *** a conversation will hopefully involve regulators,operators,producers,consumers,and the research *** hope that this special section will spur innovative ideas that will contribute to ensuring a secure,efficient,and environmentally friendly supply of electrical ener-gy,and to eventually achieve a carbon-free electricity *** special section includes 15 research articles on control,operations,regulation,planning,forecasting,and estimation of power systems with increasing renewable penetration.

关键词： Market operations eventually

Quantification of corneal neovascularization after ex vivo limbal epithelial stem cell therapy

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International journal of Ophthalmology(English edition) 2014年第6期7卷 988-995页

作者： Adriano Guarnieri javier Moreno-Monta?és Belén Alfonso-Bartolozzi Alfonso L.Sabater María García-guzmán Enrique j.andreu Felipe Prosper Department of Ophthalmology Clínica Universidad de Navarra Department of Cell Therapy Clínica Universidad de Navarra

AIM: To assess cultured limbal epithelial stem cell transplantation in patients with limbal stem cell deficiency by analyzing and quantifying corneal ***: This retrospective, interventional case series included eight eyes with total limbal stem cell deficiency. Ex vivo limbal epithelial stem cells were cultured on human amniotic membrane using an animalfree culture method. The clinical parameters of limbal stem cell deficiency, impression cytology, and quantification of corneal neovascularization were evaluated before and after cultured limbal stem cell transplantation. The area of corneal neovascularization,vessel caliber(VC), and invasive area(IA) were analyzed before and after stem cell transplantation by image analysis software. Best-corrected visual acuity(BCVA),epithelial transparency, and impression cytology were also ***: One year after surgery, successful cases showed a reduction(improvement) of all three parameters of corneal neovascularization [neovascular area(nA), VC, IA], while failed cases did not. nA decreased a mean of 32.31%(P =0.035), invasion area29.37%(P =0.018) and VC 14.29%(P =0.072). BCVA improved in all eyes(mean follow-up, 76 ±21mo).Epithelial transparency improved significantly from 2.00 ±0.93 to 0.88±1.25(P =0.014). Impression cytology showed that three cases failed after limbal epithelial stem cell therapy before 1y of ***: This method of analyzing andmonitoring surface vessels is useful for evaluating the epithelial status during follow-up, as successful cases showed a bigger reduction in corneal neovascularization parameters than failed cases. Using this method,successful cases could be differentiated from failed cases.

关键词： limbal stem cell corneal neovascularization stem cell therapy impression cytology limbal stem cell deficiency

Production of Ag-ZnO powders by hot mechanochemical processing

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Transactions of nonferrous Metals Society of China 2019年第2期29卷 365-373页

作者： D.guzmán C.AGUILAR P.ROjAS j.M.CRIADO M.j.DIánEZ R.ESPInOZA A.guzmán C.MARTínEZ Departamento de Ingeniería en Metalurgia Universidad de Atacama Departamento de Ingeniería Metalúrgica y de Materiales Universidad Técnica Federico Santa María Escuela de Dise?o Universidad Adolfo Ibá?ez Instituto de Ciencias de Materiales de Sevilla C.S.I.C Departamento de Ciencia de los Materiales Universidad de Chile Laboratorio de Corrosión Instituto de QuímicaPontificia Universidad Católica de Valparaíso

Ag–CdO composites are still one of the most commonly used electrical contact materials in low-voltage applications owing to their excellent electrical and mechanical ***,considering the restriction on using Cd due to its toxicity,it is necessary to find alternative materials that can replace these *** this study,the synthesis of Ag-ZnO alloys from Ag-Zn solid solutions was investigated by hot mechanochemical *** hot mechanochemical processing was conducted in a modified attritor mill at 138℃under flowing O2 at 1200 cm3/min for 3.0 *** microstructure and phase evolution were investigated using X-ray diffractometry,field emission gun scanning electron microscopy and transmission electron *** results suggest that it is possible to complete the oxidation of Ag-Zn solid solution by hot mechanochemical processing at a low temperature and short *** novel synthesis route can produce Ag-ZnO composites with a homogeneous distribution of nanoscale ZnO precipitates,which is impossible to achieve using the conventional material processing *** the fact that the fundamental approach to improving electric contact material performance resides in obtaining uniform dispersion of the second-phase in the Ag matrix,this new processing route could open the possibility for Ag-ZnO composites to replace non-environmentally friendly Ag-CdO.

关键词： Ag-ZnO nanocomposite electrical contact material powder synthesis milling

Enhancement and Optimization of ATO nano-crystalline Films Properties by the Addition of Acetylacetone as Modifier in the Sol-gel Process

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journal of Wuhan University of Technology(Materials Science) 2015年第5期30卷 873-881页

作者： Galaviz-pérez j.a CHEn Fei SHEn Qiang vargas-garcía j R 张联盟 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Dept.of Materials and Metallurgical Eng. National Polytechnic Institute

Sb-doped Sn O2(ATO) thin films have been prepared using the spin coating method by selecting the proper amount of acetylacetone as solution modifier. All ATO powders and films exhibited the cassiterite rutile-like structure in a crystal size below 10 nm under all the experimental conditions and a nonpreviously reported crystal structure was observed at high acetylacetone loads. The acetylacetone molar ratio influenced notably the optical and electrical properties of ATO films. When prepared at an acetylacetone molar ratio of 4, ATO films exhibited optical transparencies above 90% in the visible region and above 40% in the UV region for thicknesses of 100 and 300 nm. Films in a thickness of 100 nm and at an annealing temperature of 650 ℃ accounted for a high transparency of 97% in the visible wavelength. Films prepared at an acetylacetone molar ratio of 4 exhibited an electric resistivity of 1.33×10-3 Ω·cm at an annealing temperature of 650 ℃. The optimal Sb content for ATO films was found to be 8 at%. The relationships among the properties of starting solutions, the experimental parameters, and properties of ATO films are discussed.

关键词： tin oxide films antimony doping acetylacetone optical transparency electric properties

Role of chromosomal instability and clonal heterogeneity in the therapy response of breast cancer cell lines

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Cancer Biology & Medicine 2020年第4期17卷 970-985页

作者： natalia vargas-Rondon Erika Perez-Mora Victoria E.Villegas Milena Rondon-Lagos School of Biological Sciences Universidad Pedagogica y Tecnologica de ColombiaTunja 150003Colombia Biology Program Faculty of Natural SciencesUniversidad del RosarioBogota 111221Colombia

Objective:Chromosomal instability(CIn)is a hallmark of cancer characterized by cell-to-cell variability in the number or structure of chromosomes,frequently observed in cancer cell populations and is associated with poor prognosis,metastasis,and therapeutic *** cancer(BC)is characterized by unstable karyotypes and recent reports have indicated that CIn may influence the response of BC to chemotherapy ***,paradoxical associations between extreme CIn and improved outcome have been ***:This study aimed to 1)evaluate CIn levels and clonal heterogeneity(CH)in MCF7,ZR-751,MDA-MB468,BT474,and KPL4 BC cells treated with low doses of tamoxifen(TAM),docetaxel(DOC),doxorubicin(DOX),Herceptin(HT),and combined treatments(TAM/DOC,TAM/DOX,TAM/HT,HT/DOC,and HT/DOX)by using fluorescence in situ hybridization(FISH),and 2)examine the association with response to treatments by comparing FISH results with cell ***:Intermediate CIn was linked to drug sensitivity according to three characteristics:estrogen receptorα(ERα)and HER2 status,pre-existing CIn level in cancer cells,and the CIn induced by the ***α+/HER2-cells with intermediate CIn were sensitive to treatment with taxanes(DOC)and anthracyclines(DOX),while ERα-/HER2-,ERα+/HER2+,and ERα-/HER2+cells with intermediate CIn were resistant to these ***:A greater understanding of CIn and CH in BC could assist in the optimization of existing therapeutic regimens and/or in supporting new strategies to improve cancer outcomes.

关键词： Breast cancer chromosomal instability therapy resistance FISH clonal heterogeneity

Living donor liver transplantation for patients with advanced hepatocellular carcinoma

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Hepatoma Research 2020年第11期6卷 18-31页

作者： j.Michael Cullen Paola vargas nicolas Goldaracena Department of Surgery University of VirginiaCharlottesvilleVA 22908USA Division of Transplantation Department of SurgeryUniversity of VirginiaCharlottesvilleVA 22908USA

Liver transplantation(LT)is the treatment of choice for patients with hepatocellular carcinoma(HCC)and underlying liver *** the organ scarcity,LT for patients with HCC have been restricted to those patients associated with the highest ***,many patients with extended criteria HCC can still benefit from LT,but due to deceased organ shortage,they are not offered that *** donor liver transplantation(LDLT)emerged as a successful strategy to overcome organ shortage around the world and as LDLT experience grows,this technique might offer the opportunity to expand the indications of LT to patients with advanced ***,since LDLT is not competing for deceased donor organs,many patients with extended criteria HCC who could still benefit from transplantation may have access to this treatment *** this review,we will discuss the role of LDLT for patients with advanced-stage HCC and how LDLT allows for safe expansion of HCC transplant criteria.

关键词： Living donor liver transplantation hepatocellular carcinoma liver transplantation transplant oncology clinical outcomes

Multi-isotope and geochemical approach to the magma source and tectonic setting of Proterozoic anorthosite massifs and AnorthositeMangerite-Charnockite-Granite(AMCG)suites

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Geoscience Frontiers 2024年第6期15卷 2-21页

作者： L.A.Elizondo-Pacheco L.A.Solari R.González-guzmán H.L.He E.Becerra-Torres j.a.Ramírez-Fernández R.Maldonado Posgrado en Ciencias de la Tierra Instituto de GeocienciasUniversidad Nacional Autónoma de MéxicoSantiago de Querétaro 76230Mexico Instituto de Geociencias Universidad Nacional Autónoma de MéxicoSantiago de Querétaro 76230Mexico Departamento de Geología División de Ciencias de la TierraCICESEEnsenada 22860Mexico School of Earth Sciences Yunnan UniversityKunming 650500PR China Yunnan International joint Laboratory of Critical Mineral Resource Kunming 650500PR China Escuela nacional de Estudios Superiores Unidad juriquilla Universidad Nacional Autónoma de MéxicoSantiago de Querétaro 76230México Facultad de Ciencias de la Tierra Universidad Autónoma de Nuevo LeónLinares 67700Mexico Instituto de Geología Universidad Nacional Autónoma de MéxicoCiudad de México 04510Mexico

The occurrence of massif-type anorthosite intrusions is a widespread Proterozoic *** are usually associated with gabbroic,charnockitic,and granitic rocks,comprising the so-called anorthositemangerite-charnockite-granite(AMCG)*** these rocks have been extensively studied worldwide,several aspects concerning their formation remain *** them,the magma source and the tectonic setting are the most *** evaluate these issues,we first compiled geochemical and isotopic data of Proterozoic anorthosite massifs and AMCG suites worldwide and stored it in a database named *** plethora of data allows us to make some important *** argue that the wide-ranging multi-isotopic composition of this group of rocks reflects varying proportions of juvenile mantle-derived melts and crustal *** interpret that the precursor magmas of most massive anorthosite bodies and associated mafic rocks have a mantle-dominated ***,we highlight that a crustal component is indispensable to generate these *** variable amounts of this material during succeeding multi-stage assimilation-fractional crystallization(AFC)processes gives these intrusions their typical mantle-crustal hybrid isotopic *** contrast,a crustaldominant origin with a complementary mantle component is interpreted for most MCG *** summary,the isotopic information in datAMCG indicates that both sources are necessary to generate AMCG ***,we suggest that hybridized magmas with different mantle-crust proportions originate these *** interpretation might offer a more nuanced and accurate depiction of this phenomenon in future work instead of choosing a single-sourced model as in the past ***,tectonomagmatic diagrams suggest that the rocks under study were likely generated in a tectonic environment that transitioned between collision and post-collisional extension,sometimes involving subduction-modified ma

关键词： Massif-type anorthosite Anorthosite-granite suite Magmatic sources Hybridized magmas Tectonic setting Post-orogenic extension

Effect of different exogenous fatty acids on the cytosolic triacylglycerol content in bovine mammary cells

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Animal nutrition 2019年第2期5卷 202-208页

作者： Einar vargas-Bello-Pérez j.an j.Loor Philip C Garnsworthy The University of nottingham Sutton Bonington Campus Department of Veterinary and Animal Sciences Faculty of Health and Medical SciencesUniversity of Copenhagen Department of Animal Sciences and Division of nutritional Sciences University of Illinois1207 West Gregory DriveUrbana

The objective of this study was to determine how cytosolic triacylglycerols(TAG) are stored in mammary cells and whether this depends on the individual chemical configuration of fatty acids(FA). This objective was accomplished by addition of different FA to a FA-free medium used to culture mammary alveolar cells-large T antigen cells(MAC-T). Treatments consisted of adding FA(palmitate, stearate, oleate, linoleate,rumenic acid [CLA], elaidate and vaccinate) solutions to the medium at 100, 200, 300 and 400 mmol/L concentrations for a 24-h incubation period. At the end of each incubation period, cytosolic TAG, DnA and protein contents were measured. Palmitate, vaccenate, linoleate and CLA increased(P n). Palmitate and CLA increased(P justed for DnA content. Overall, effects on cytosolic TAG accumulation depended on individual FA structure(chain length, degree of saturation, and number and orientation of FA double bonds). In addition, the long-chain FA used in this study did not have a detrimental effect on MAC-T cells as indicated by cytosolic protein and DnA contents reflecting their biological role in lipid accumulation.

关键词： Long chain fatty acid Mammary cells Trans fatty acid Triacylglycerol accumulation Vaccenic acid

Population dynamics of three lizard species from the genus Sceloporus:short-term changes in demographic parameters

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Integrative Zoology 2019年第6期14卷 542-560页

作者： Selene vargas-GARCÍA Víctor ARGAEZ Israel SOLAnO-ZAVALETA j.jaime ZÚÑIGA-VEGA Graduate Program in Biological Sciences National Autonomous University of MexicoUniversity CityMexico CityMéxico Department of Ecology and natural Resources Faculty of SciencesNational Autonomous University of MexicoUniversity CityMexico CityMéxico.

Most demographic studies focus on numerical changes that occur within populations across ***,typically studies at an interannual scale do not provide information on the particular times of the year(particular months or seasons)when rates of survival,recruitment,or migration increase or decrease due to physiological,behavioral or ecological *** monthly or seasonal changes in demographic parameters may lead to substantial variations in population *** this study,we collected capture-mark-recapture data on 3 species of lizards of the genus Sceloporus(Sceloporus torquatus,Sceloporus grammicus and Sceloporus megalepidurus)found in ecologically similar habitats to examine potential changes in demographic rates among 3 different climatic seasons:rainy,cold-dry and warm-dry *** tested different hypotheses about the effect of these seasons on survival,recruitment of new adults,and temporary *** found that during the season with severe thermal constraints,the cold-dry season,survival of *** decreased *** also detected a considerable increase in the recruitment rate of *** during the rainy season,when these lizards are establishing territories and finding *** contrast,we found no evidence of intra-annual changes in the rate of temporary *** addition,we calculated abundance and population growth rates for each species and for each *** study represents a significant contribution to the understanding of intra-annual demographic variation in lizards.

关键词： abundance recruitment Sceloporus lizards survival temporary emigration