检索结果-南通市图书馆

Differential response of injured and healthy retinas to syngeneic and allogeneic transplantation of a clonal cell line of imm.rtalized olfactory ensheathing glia:a double-edged sword

在线全文

学校读者我要写书评

暂无评论

Neural regeneration research 2025年第8期20卷 2395-2407页

作者： m.ría Norte-muñoz m.ría Portela-Lomba Paloma Sobrado-calvo Diana Simón Johnny Di Pierdomenico Alejandro Gallego-Ortega m.r Pérez Josémcabrera-maqueda Javier Sierra manuel Vidal-Sanz m.ría Teresa m.reno-flores m.rta Agudo-Barriuso Grupo de Investigación Oftalmología Experimental Departamento de OftalmologíaOptometríaOtorrinolaringología y Anatomía PatológicaFacultad de MedicinaUniversidad de MurciaInstituto Murciano de Investigación Biosanitaria(IMIB)Campus de Ciencias de la SaludMurciaSpain Experimental Sciences Faculty Universidad Francisco de VitoriaPozuelo de AlarcónMadridSpain Anatomy Histology and Neuroscience DepartmentMedicine FacultyUniversidad Autónoma de MadridMadridSpain center of Neuroimmunology Service of NeurologyLaboratory of Advanced Imaging in Neuroimmunological DiseasesHospital Clínic of BarcelonaInstitut d’Investigacions Biomèdiques August Pi i Sunyer(IDIBAPS)and Universitat de BarcelonaBarcelonaSpain medicine Faculty Universidad Francisco de VitoriaPozuelo de AlarcónMadridSpain

Olfactory ensheathing glia promote axonal regeneration in the mammalian central nervous system,including retinal ganglion cell axonal growth through the injured optic ***,it is unknown whether olfactory ensheathing glia also have neuroprotective *** ensheathing glia express brain-derived neurotrophic factor,one of the best neuroprotectants for axotomized retinal ganglion ***,we aimed to investigate the neuroprotective capacity of olfactory ensheating glia after optic nerve *** ensheathing glia cells from an established rat imm.rtalized clonal cell line,TEG3,were intravitreally injected in intact and axotomized retinas in syngeneic and allogeneic mode with or without microglial inhibition or immunosuppressive *** and gene expression analyses were *** bulb-derived prim.ry olfactory ensheathing glia and TEG3 express major histocompatibility complex classⅡ*** and syngenically transplanted TEG3 cells survived in the vitreous for up to 21 days,forming an *** axotomized retinas,only the allogeneic TEG3 transplant rescued retinal ganglion cells at 7 days but not at 21 *** these retinas,microglial anatomical activation was higher than after optic nerve crush *** intact retinas,both transplants activated microglial cells and caused retinal ganglion cell death at 21 days,a loss that was higher after allotransplantation,triggered by pyroptosis and partially rescued by microglial inhibition or ***,neuroprotection of axotomized retinal ganglion cells did not im.rove with these *** different neuroprotective properties,different toxic effects,and different responses to microglial inhibitory treatments of olfactory ensheathing glia in the retina depending on the type of transplant highlight the importance of thorough preclinical studies to explore these variables.

关键词： cell therapy immune recognition major histocompatibility complex class II(mHcII) neuroprotection olfactory ensheathing glia retinal ganglion cells

Digestibility,Antioxidant and Anti-Inflammatory Activities of Pecan Nutshell(carya illioinensis)Extracts

在线全文

学校读者我要写书评

暂无评论

Journal of renewable materials 2022年第10期10卷 2569-2580页

作者： m.ría Janeth rodríguez-roque carmen Lizette Del-Toro-Sánchez Janet madeline chávez-Ayala ricardo Iván González-Vega Liliana m.ribel Pérez-Pérez Esteban Sánchez-chávez Nora AideéSalas-Salazar Juan manuel Soto-Parra rey David Iturralde-García m.ría antonia flores-córdova Facultad de ciencias Agrotecnológicas Universidad Autónoma de ChihuahuaChihuahuaMéxico Universidad de Sonora Rosales y Niños Héroes S/NHermosilloSonMéxico centro de Investigación en Alimentación y Desarrollo A.C.Unidad DeliciasDeliciasChihuahuaMéxico

Phenolic compounds are related to high biological activity,avoiding oxidation in food and human *** are by-products derived from the pecan nut processing that contain important amounts of phenols which biological activity must be *** research aimed to evaluate the antioxidant(DPPH,ABTS,FrAP and hemolysis)and anti-inflammatory activities of shell extracts from pecan nuts harvested during the crop production cycle 2018 and 2019,as well as the in vitro digestibility of their phenolic compounds,including *** showed that extracts from the crop production cycle 2018 obtained the highest yield,while those from 2019 contained the highest concentration of phenolic compounds,flavonoids and antioxidant capacity determined by DPPH(22.96 mmol ET),ABTS(91.55 mmol ET)and inhibition of hemolysis(92.12%).The anti-inflammatory activity exhibited an inhibition of the elastase enzyme up to 50 min and the bioaccessibility of phenolic compounds reached up to 32%.These results showed that pecan nutshell extracts are an important source of biologically active compounds,thus,they are suitable to be used as commodities in different fields such as agricultural,food and pharmaceutical *** studies must be carried out in order to elucidate the activity of nutshell extracts within in vivo systems.

关键词： Anti-inflammatory activity antioxidants digestibility shell phenolic compounds

recent Advances in Synthesis and Properties of Hybrid Halide Perovskites for Photovoltaics

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-micro Letters 2018年第4期10卷 167-200页

作者： c.c.Vidyasagar Blanca m.muoz flores Víctor m.Jimnez Prez Universidad Autónoma de Nuevo León Facultad de Ciencias Químicas Ciudad Universitaria School of Basic Sciences and research in chemistry Rani Channamma University

The progress made by the scientific community in em.rging photovoltaic technologies over the past two decades has been outstanding. Num.rous methods have been developed for the preparation of hybrid organic–inorganic perovskite solar cells. The power conversion efficiency has been up to 14% by a one-step vacuum deposition technique. A serious concern is the toxicity of the materials. In this review, several methods aimed at resolving these problems to some extent have been compiled, including eco-friendly synthesis. Further efficiency enhancements are expected following optimization, and a better fundamental understanding of the internal electron charge transfer, electron–hole diffusion to the corresponding layers, flexibility, and stability-dependent bandgaps is reported. This paper explores the green synthesis of organic–inorganic perovskites for industrialization. concerning the above facts, a simple low-cost model called‘‘dispersed photovoltaic cells' ' is presented.

关键词： Perovskites Solar cells Organic–inorganic perovskites Synthetic routes Fluorescence

microwave-ultrasound assisted extraction of red corn pigments and their effect on chemical composition and tecno-functional properties

在线全文

学校读者我要写书评

暂无评论

Food Bioscience 2022年第6期50卷 1111-1119页

作者： J.D.Garcia-Ortiz A.c.flores-Gallegos J.A.Ascacio-Valdés c.m.López-Badillo S.D.Nery-flores S.c.Esparza-González r.rodríguez-Herrera School of chemistry Autonomous University of CoahuilaCampus SaltilloSaltilloCoahuila25280Mexico School of Dentistry Autonomous University of CoahuilaCampus SaltilloSaltilloCoahuila25125Mexico

currently, there is a growing interest in obtaining natural pigments, without presenting a risk to health, as well as to the matrix and food safety. The objective of this study was to characterize grains with different shades of red color (High pigmentation maize = rA, medium pigmentation maize = rm, and Low pigmentation maize = rB, reddish maize with white segments = VO and white maize control = Sc). The physical properties (kernel weight, length, width, thickness, and grain and flour color), chemical composition (moisture, fat, protein, fiber, starch, ash, and minerals), and techno-functional properties (capacity of absorption of organic molecules (OmAc), swelling (cH), oil retention (cAAc), and water absorption (WAS)) variables were measured. Afterward, rm was selected, and a pigment extraction (EAUm) was carried out using microwave-ultrasound equipment with different ratios of ethanol (0, 30, and 70%) and citric acid ratios (0 and 1%). The color and properties of the solid (starch, protein, fat, and their techno-functional properties) were determined in the aqueous phase and were compared with the properties prior to EAUm. The results indicated that the red grains have higher starch content (57.6%) and reddish colors, in addition, VO presented higher moisture (10.4%), fat (6.7%) and fiber (10.0%). The colors of the pigments obtained with EtOH (30 and 70%) show shades red and yellow. Finally, the EAUm decreased the fat content up to 57%, increased WAS and cAAc in the residual flour and generated changes in OmAc and cH, increasing in aqueous medium and reducing with EtOH.

关键词： Natural colorant Zea mays Green extraction Proximal analysis NIr Agronomic properties

control Alternatives for Damping-Off in Tomato Seedling Production

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Phyton-International Journal of Experimental Botany 2019年第3期88卷 325-333页

作者： A.c.michel-Aceves J.F.Díaz-Nájera r.Ariza-flores m.A.Otero-Sánchez r.Escobar-m.rtínez c.H.Avendaño-Arrazate centro de Estudios Profesionales del colegio Superior Agropecuario del Estado de Guerrero Av.Vicente Guerrero No.81Colonia CentroIgualaGuerreroC.P.40000México Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias(INIFAP)Campo Experimental IgualaCarr.Iguala-TuxpanKm.2.5 IgualaGuerreroMéxico INIFAP-campo Experimental rosario Izapa.carr.Tapachula-cacahoatán Tuxtla chicoChiapasC.P.30870México

In two tomato genotypes,we assessed control alternatives for damping-off with combinations of chemical fungicides and native/comm.rcial strains of biological *** treatments consisting of 19 levels of mixing products,chemical fungicides,native strains and comm.rcial products from biological control agents,and untreated treatment were used onto ramsés and Toro *** were distributed on an incomplete block design in divided plots arrangement,where genotypes constitute the larger ones and the 8-repetition mixed products,the smaller *** 180 mL of fungal complexes,made of spores and mycellium Fusarium-solani(2×106 UFc),rhizoctonia-solani(1×106 UFc),Phytophthora-capsici(1×105 UFc)and Sclerotium.rolfsii(mycellium-sclerotia)on each seedling trays,made inoculation *** mixtures of(Bacillus spp.+Streptomyces spp.+Trichoderma spp.)+(Propamocarb+Fosetyl);(Bacillus spp.+Streptomyces spp.+Trichoderma spp.)+(metalaxyl+chlorothalonil);Pseudomonas fluorescens+Streptomyces+micromonospore+Sporideamium+Aminoacidos,Péptidos,carbohidratos)+(Propamocarb+Fosetyl);the native strain of Trichoderma asperellum+(Propamocarb+fosetil)and the native strains Trichoderma asperellum+Bacillus subtilis,diminished damping-off,prevented its appearance and had most significant agronomic *** contrast to this,combination of(mancozeb)+(Free iodine)+(metalaxyl+chlorothalonil)+(methyl thiophanate)produced some toxicity in the *** addition,ramsés presented the best agronomic parameters,while Toro had the utmost fresh and dry weight in root.

关键词： Trichoderma harzianum T.lignorum biological control

Facilitation by nurse plants contributes to vegetation recovery in human-disturbed desert ecosystems

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 Plant Ecology 2016年第5期9卷 485-497页

作者： Ernesto I.Badano Om.r r.Samour-Nieva Joel flores JoséL.flores-flores Jorge A.flores-cano Juan P.rodas-Ortíz División de ciencias Ambientales Instituto Potosino de Investigación Científica y TecnológicaA.C.Camino a la Presa San José2055Colonia Lomas 4ta SecciónC.P.78216San Luis PotosíMéxico Instituto de Investigación de Zonas Desérticas Universidad Autónoma de San Luis PotosíAltair 200Fraccionamiento del LlanoC.P.78377San Luis PotosíMéxico Facultad de Agronomía Universidad Autónoma de San Luis PotosíKm.14.5 Carretera San Luis-MatehualaApdo.Postal 32Soledad de Graciano SánchezC.P.78321San Luis PotosíMéxico

Aims Facilitation by nurse plants is a common interaction in harsh environments and this positive plant-plant interaction may promote vegetation recovery in ecosystems affected by human *** the relevance of this process,however,requires assessing how nurse plants influence the establishment of other species,as well as the proportion of species in the regional species pool that would benefit from the presence of nurse plants in human-disturbed ***,since vegetation recovery is a time-dependent process,the community-level consequences of facilitation are likely to vary among landscapes with different disturbance ***,an integrative perspective of the relevance of nurse plants for vegetation recovery could be obtained by measuring their effects across different human-disturbed landscapes of the target *** study focuses on these issues and uses a regional-scale approach to assess the community-level effects of a widespread nurse plant of Am.rican deserts,the creosotebush(Larrea tridentata).methods This study was conducted in the southernmost portion of chihuahuan Desert because most floodplain valleys of this region have been affected by human activities during the past *** this study,we selected 10 floodplain valleys differing in their age(*** time elapsed after human activities were ceased).At each landscape,we measured the cover of creosotebushes and the proportion of plant species positively associated with them,as well as the density of seeds in the soil beneath creosotebush *** these data were regressed against the age of the ***,to assess whether positive association patterns were due to facilitation or other processes,we conducted field experiments and measured the ecophysiological performance of plant species established beneath and outside creosotebush *** Findings most plant species from the target region were positively associated to creosotebushes,and our field

关键词： chihuahuan desert community-level effects community succession positive interactions mexico

An Invasive Succulent Plant (Kalanchoe daigremontiana) Influences Soil carbon and Nitrogen mineralization in a Neotropical Semiarid Zone

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Pedosphere 2018年第4期28卷 632-643页

作者： Ileana HErrErA Jose r. FErrEr-PArIS Diana BENZO Saul flores Belkis GArcIA Jafet m. NASSAr Ecuela de ciencias Ambientales Universidad Espiritu Santo Guayaquil 091650 (Ecuador) centro de Ecologla Instituto Venezolano de Investigaciones Cientificas (IVIC) Caracas 1020 (Venezuela) centro de Estudios Botdnieos y Agroforestales Instituto Venezolano de Investigaeiones Cientificas Maracaibo 4005 (Venezuela)

It has long been recognized that plant invasions may alter carbon （c） and nitrogen （N） cycles, but the direction and magnitude of such alterations have been rarely quantified. In this study, we quantified the effects caused by the invasion of a noxious exotic plant, Kalanchoe daigrernontiana （crassulaceae）, on c and N mineralization and enzymatic and microbial activities in the soil of a semiarid locality in Venezuela. We compared soil parameters associated with these processes （c and N mineralization time and the cumulative values, fluorescein diacetate hydrolytic activity, and activities of dehydrogenase, β-glucosidase, glucosaminidase, and urease） between invaded and adjacent non-invaded sites. In addition, correlations among these parameters and the soil physical-chemical properties were also examined to determine if a positive feedback exists between nutrient availability and K. daigremontiana invasion. Overall, our results showed that c mineralization and transformation of organic compounds to NH4^＋ were favored at sites colonized by K. daigrernontiana. With this species, we found the highest cumulative amounts of NH4^＋-N and c and the lowest mineralization time. These results could be explained by higher activities of urease and glueosaminidase in soils under the influence of K. daigremontiana. In addition, higher amounts of organic matter and moisture content in invaded soils might favor c and N mineralization. In conclusion, invasion of Neotropical semiarid zones by K. daigrernontiana may influence the chemical and biological properties of the soils covered by this species, increasing nutrient bioavailability, which, in time, can facilitate the invasion process.

关键词： Akaike Information criterion c and N pools enzymatic activity NH4^+-N NO3^--N nutrient availability plant invasion

Asphaltene Erosion Process in Air Plasma: Emission Spectroscopy and Surface Analysis for Air-Plasma reactions

在线全文

学校读者我要写书评

暂无评论

Plasma Science and Technology 2012年第4期14卷 303-311页

作者： H.m.rTINEZ O. flores J.c. POVEDA B. cAmPILLO Institute of Physical Sciences Autonomous National University of Mexico chemistry Faculty Autonomous National University of Mexico

Optical emission spectroscopy （OES） was applied for plasma characterization during the erosion of asphaltene substrates. An amount of 100 mg of asphaltene was carefully applied to an electrode and exposed to air-plasma glow discharge at a pressure of 1.0 Torr. The plasma was generated in a stainless steel discharge chamber by an ac generator at a frequency of 60 Hz, output power of 50 W and a gas flow rate of 1.8 L/min. The electron temperature and ion density were estimated to be 2.15±0.11 eV and （1.24±0.05）× 10^16 m^-3, respectively, using a double Langmuir probe. OES was employed to observe the emission from the asphaltene exposed to air plasma. Both molecular band emission from N2, N2＋, OH, cH, NH, O2 as well as cN, and atomic light emission from V and Hγ were observed and used to monitor the evolution of asphaltene erosion. The asphaltene erosion was analyzed with the aid of a scanning electron microscope （SEm） equipped with an energy dispersive X-ray （EDX） detector. The EDX analysis showed that the time evolution of elements c, O, S and V were similar and the chemical composition of the exposed asphaltenes remained constant. Particle size evolution was measured, showing a maximum size of 2307 μm after 60 min. This behavior is most likely related to particle agglom.ration as a function of time.

关键词： asphaltene erosion surface analysis optical emission spectroscopy pulsedplasma glow discharge

Impact of Organic and mineral Fertilization in Pecan Nut on Production,Quality and Antioxidant capacity

在线全文

学校读者我要写书评

暂无评论

Agricultural Sciences 2019年第2期10卷 227-240页

作者： Linda citlalli Noperi-mosqueda Juan manuel Soto-Parra Esteban Sánchez Francisco Javier Pina-ram.rez ramona Pérez-Leal m.ría antonia flores-córdova Nora Aideé Salas-Salazar Facultad de ciencias Agrotecnológicas Universidad Autónoma de ChihuahuaChihuahuaMéxico centro de Investigación en Alimentación y Desarrollo A.c.Delicias ChihuahuaMéxico

The pecan nut is considered one of the most important dried fruits in the world by its classification as healthy food. The nutritional balance in the harvest is crucial for its impact on the production, quality and content of bioactive compounds. This research was carried out in the city of Aldama, chihuahua (mexico), where doses of mineral and organic fertilization were tested in L25 Taguchi structure with 6 factors and 5 levels by factor: nitrogen (N) 0 - 240 kg·ha-1, phosphate (P2O5) 0 - 120 kg·ha-1, potassium (K2O) 0 - 100 kg·ha-1, calcium (caO) 0 - 400 kg·ha-1, liquid humus 0 - 3600 L·ha-1 and solid humus 0 - 8000 kg·ha-1. An average yield of 2.2 t·ha-1 was obtained;145 nuts per kilogram, 60% of the edible part of the nut. The total phenolic content was 225.9 mg gallic acid g-1 and the antioxidant capacity was 180.9 mg Trolox g-1. It is concluded that the factor with the greatest impact on yield, quality and antioxidant capacity in pecan nut was nitrogen. It was also found that the combination of mineral and organic fertilization helps to maintain the production and quality ranges of the nut. In turn, these factors contribute to the increase in the phenolic strength and antioxidant capacity. The optimal fertilization dosis to obtain the maximum levels in production of 3.2 t·ha-1;decrease the number of nuts per kilogram to 135, increase the percentage of the edible part of the nut to 61.8%, the increase in the total phenolic content to 318.6 mg of gallic acid g-1 and in the antioxidant capacity with 187.2 mg of Trolox g-1, was 184 kg·ha-1 of N, 107.4 kg·ha-1 of P2O5, 50 kg·ha-1 of K2O y 2777 L·ha-1 of liquid humus. Finally, the mineral fertilization complemented with organic fertilization is considered a good fertilization strategy for pecan trees and its possible benefits to health and the environment.

关键词： carya illinoinensis(Wangen K.Koch) Pecan Nut Nutrition Organic Fertilization Antioxidants