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Differential Expression of Genes Related to Fruit Development and capsaicinoids Synthesis in Habanero pepper plants Grown in Contrasting Soil Types

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phyton-International Journal of Experimental Botany 2024年第2期93卷 151-183页

作者： Eduardo Burgos-Valencia Federico garcía-laynes Ileana Echevarría-machado Fatima medina-lara miriam monforte-González JoséNarváez-Zapata manuel martínez-Estévez Unidad de Bioquímica y Biología molecular de plantas Centro de Investigación Científica de YucatánCalle 43#130Chuburnáde HidalgoMéridaYucatán97205México Instituto politécnico Nacional-Centro de Biotecnología Genómica Blvd Del Maestro esq.Elias PiñaReynosaTamaulipas88710México

Habanero pepper(capsicum chinense Jacq.)is a crop of economic relevance in the peninsula of *** fruits have a high level of capsaicinoids compared to peppers grown in other regions of the world,which gives them industrial *** is an important factor that affects pepper development,nutritional quality,and capsaicinoid ***,the effect of soil type on fruit development and capsaicinoid metabolism has been little *** work aimed to compare the effect of soils with contrasting characteristics,black soil(BS)and red soil(RS),on the expression of genes related to the development of fruits,and capsaicinoid synthesis using a transcriptomic analysis of the habanero pepper *** growing in RS had bigger fruits and higher expression of genes related to floral development,fruit abscission,and softening which suggests that RS stimulates fruit development from early stages until maturation *** from plants growing in BS had enrichment in metabolic pathways related to growth,sugars,and ***,these fruits had higher capsaicinoid accumulation at 25 days post-anthesis,and higher expression of genes related to the branched-chain amino acids metabolism(ketol-acid reductisomerase KARI),pentose phosphate pathway and production of NADpH(glucose-6-phosphate-1-dehydrogenase G6pDH),and proteasome and vesicular traffic in cells(26S proteasome regulatory subunit T4 RpT4),which suggest that BS is better in the early stimulation of pathways related to the nutritional quality and capsaicinoid metabolism in the fruits.

关键词： capsicum chinense jacq soil types plant growth environmental conditions fruit quality capsaicinoid metabolism transcriptome

A Hybrid model Evaluation Based on pca Regression Schemes Applied to Seasonal precipitation Forecast

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Atmospheric and Climate Sciences 2024年第3期14卷 328-353页

作者： pedro m. González-Jardines Aleida Rosquete-Estévez maibys Sierra-lorenzo Arnoldo Bezanilla-morlot Center for Atmospheric physics Institute of Meteorology Havana Cuba

possible changes in the structure and seasonal variability of the subtropical ridge may lead to changes in the rainfall’s variability modes over caribbean region. This generates additional difficulties around water resource planning, therefore, obtaining seasonal prediction models that allow these variations to be characterized in detail, it’s a concern, specially for island states. This research proposes the construction of statistical-dynamic models based on pca regression methods. It is used as predictand the monthly precipitation accumulated, while the predictors (6) are extracted from the ECmWF-SEAS5 ensemble mean forecasts with a lag of one month with respect to the target month. In the construction of the models, two sequential training schemes are evaluated, obtaining that only the shorter preserves the seasonal characteristics of the predictand. The evaluation metrics used, where cell-point and dichotomous methodologies are combined, suggest that the predictors related to sea surface temperatures do not adequately represent the seasonal variability of the predictand, however, others such as the temperature at 850 hpa and the Outgoing longwave Radiation are represented with a good approximation regardless of the model chosen. In this sense, the models built with the nearest neighbor methodology were the most efficient. Using the individual models with the best results, an ensemble is built that allows improving the individual skill of the models selected as members by correcting the underestimation of precipitation in the dynamic model during the wet season, although problems of overestimation persist for thresholds lower than 50 mm.

关键词： Seasonal Forecast principal Component Regression Statistical-Dynamic models

Cell Death mechanisms Induced by Cytotoxic lymphocytes

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Cellular & molecular Immunology 2009年第1期6卷 15-25页

作者： chávez-galán l Arenas-Del Angel mC Zenteno E chávez R lascurain R Departamento de Bioquímica Instituto Nacional de Enfermedades Respiratorias "Ismael Cosío Villegas" Departamento de Bioquímica Facultad de MedicinaUniversidad Nacional Autónoma de México

One of the functions of the immune system is to recognize and destroy abnormal or infected cells to maintain homeostasis. This is accomplished by cytotoxic lymphocytes. Cytotoxicity is a highly organized multifactor process. Here, we reviewed the apoptosis pathways induced by the two main cytotoxic lymphocyte subsets, natural killer （NK） cells and CD8^＋T cells. In base to recent experimental evidence, we reviewed NK receptors involved in recognition of target-cell, as well as lytic molecules such as perforin, granzymes-A and -B, and granulysin. In addition, we reviewed the Fas-Fasl intercellular linkage mediated pathway, and briefly the cross-linking of tumor necrosis factor （TNF） and TNF receptor pathway. We discussed three models of possible molecular interaction between lytic molecules from effector cytotoxic cells and target-cell membrane to induction of apoptosis. Cellular ＆ molecular Immunology.

关键词： apoptosis cytotoxic cell granule-dependent exocytosis Fasl TNF

polygeneration Study of low-to-medium Enthalpy Geothermal Reservoirs in mexico

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Journal of Thermal Science 2021年第3期30卷 1077-1087页

作者： chÁvez Oscar GODÍNEZ Francisco Tecnológico Nacional de méxico/I.T.chihuahua.Av.Tecnológico 2909 C.P.31310ChihuahuaChihuahuaMéxico Instituto de Ingeniería Universidad Nacional Autónoma de MéxicoUNAMC.U.Ciudad de MéxicoC.P.04510México polo Universitario de Tecnología Avanzada Universidad Nacional Autónoma de MéxicoVía de la Innovación No.410Autopista Monterrey-Aeropuertokm.10 PIITC.P.66629Apodaca Nuevo LeónMéxico

This study combines the thermodynamic analysis of a polygeneration system along with the numerical modelling of the thermal behavior of geothermal reservoirs in mexico to exploit their *** reservoir was modeled as a porous medium assuming a five-spot well configuration and local thermal *** heat conduction-convection along with the laplace equations were solved to compute temperature distributions,the useful life and the optimum distance between injection-extraction *** predicted temperature and pressure of the geothermal fluid at the outlet of the reservoir were exploited in the polygeneration system consisting of:(1)a Rankine cycle,(2)an absorption refrigeration cycle,and(3)a heat *** developed approach allows calculating both the optimal distance between injection-extraction wells and the global(utilization)efficiency of six arrangements(each composed by a reservoir connected to a polygeneration system)by assuming that reservoirs have a lifespan of 30 *** also show that:(a)due to the low efficiency of the Rankine cycle,very little thermal energy is converted into electrical one;(b)not only the temperature and the size are important when evaluating the power production performance of reservoirs,but also the permeability plays a fundamental role;(c)the first law efficiency of the polygeneration system ranges from 41.9%to 43.7%;(d)the utilization efficiency of the six arrangements lies in the range between 25.8%and 31%.

关键词： polygeneration system geothermal reservoir local thermal equilibrium low-to-medium enthalpy

Application of Natural Antioxidants from Strawberry Tree(Arbutus unedo l.) and Dog Rose(Rosa canina l.) to Frankfurters Subjected to Refrigerated Storage

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Journal of Integrative Agriculture 2013年第11期12卷 1972-1981页

作者： mónica Armenteros David morcuende Sonia Ventanas mario Estévez Animal production and Food Science University of ExtremaduraAv.de la Universidad s/n

The effect of the addition of natural antioxidants from strawberry tree （Arbutus unedo l.; AU） and dog rose （Rosa canina l.; RC）, in frankfurters elaborated with or without the addition of antioxidant additives （sodium ascorbate and nitrite） was studied. Six different types of experimental frankfurters were prepared depending on the addition of phenolic-rich extracts from RC and AU and the presence （p） or absence （C） of antioxidant additives. Thiobarbituric acid reactive substances （TBARS）-numbers signiifcantly increased during chilled storage of C-frankfurters while additives and fruit phenolics inhibited lipid oxidation in p-frankfurters. The amount of protein carbonyls signiifcantly increased in all treatments except in p-AU frankfurters. The discoloration process that occurred during the chilled storage was reduced by the addition of substances with proven antioxidant activity （p-frankfurters）. Texture characteristics as hardness, springiness, cohesiveness and gumminess also suffered a signiifcant deterioration in C-frankfurters. The use of phenolic fruit extracts in combination with traditional antioxidant additives is a successful strategy to enhance the oxidative stability of frankfurters without modifying their color and texture properties.

关键词： fruit phenolics protein oxidation lipid oxidation nitrite ascorbate

mediterranean Berries as Inhibitors of lipid Oxidation in porcine Burger patties Subjected to Cooking and chilled Storage

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Journal of Integrative Agriculture 2013年第11期12卷 1982-1992页

作者： Rui ganho mario Estévez mónica Armenteros David morcuende Food Science Department ESTMPolytechnic Institute of Leiria Animal production and Food Science University of ExtremaduraAv.de la Universidad s/n Animal production and Food Science University of ExtremaduraAv.de la Universidad s/nCáceres 10003Spain

The efifciency of extracts from Arbutus unedo l. （AU）, Crataegus monogyna l. （Cm）, Rosa canina l. （RC）, and Rubus ulmifolius Schott. （RU） to inhibit lipid oxidation in raw, cooked and cooked and chilled （2°C/12 d） porcine burger patties, was investigated. The modiifcation of the fatty acid proifle during processing treatments （cooking and chilling）, the quantitative measurements of thiobarbituric acid reactive substances （TBA-RS）, and lipid-derived volatiles, were used as indicators of lipid oxidation. polyunsaturated fatty acids （pUFA） gradually decreased during cooking and the subsequent storage of cooked burger patties with this decrease being signiifcantly greater （p〈0.05） in control patties than in those with added berry extracts. In accordance, the control patties showed signiifcantly higher TBA-RS numbers and counts of lipid-derived volatiles in all treatments when compared to the berry-added counterparts （p〈0.05）. Results from the present work show, for the ifrst time, that extracts from A. unedo, C. monogyna, R. canina, and R. ulmifolius are promising antioxidants which could enhance the nutritional, safety and sensory properties of porcine burger patties.

关键词： berries lipid oxidation meat pattiesm TBA-RSm polyunsaturated fatty acids lipid-derived volatiles

Structural and optical properties of CZTS nanoparticles prepared by a colloidal process

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Rare metals 2021年第9期40卷 2602-2609页

作者： R.Aruna-Devi m.latha S.Velumani JoséÁlvaro chávez-carvayar program on Nanoscience and Nanotechnology CINVESTAV-IPNSan Pedro Zacatenco07360 Mexico CityMexico CIIcap-UAEm Av.Universidad 1001.Col.Chamilpa62209 CuernavacaMorelosMexico Department of Electrical Engineering(SEES) CINVESTAV-IPNSan Pedro Zacatenco07360 Mexico CityMexico Instituto de Investigaciones en materiales UNAM04510 Mexico CityMexico

This research presents the influence of copper(Cu) concentration on the properties of copper zinc tin sulfide(CZTS) nanoparticles(Nps) synthesized by a colloidal method, employing oleylamine as an organic solvent. From the structural analysis, a pure phase of CZTS was obtained at an optimized molar ratio of 1.8:1.1:1:4,and secondary phases were observed as the Cu concentration increased. The increment of the Nps size from 15 to50 nm was noticed as a function of Cu ***, the optical bandgap energy was tuned from1.35 to 1.68 eV with respect to Cu concentration. The sample synthesized at the molar ratio of 1.8:1.1:1:4 showed a pure phase CZTS with desired elemental composition and bandgap. Furthermore, CZTS thin films were prepared by a doctor-blade method using synthesized Nps followed by annealing under a sulfur/nitrogen atmosphere. The annealed CZTS film showed a significant improvement in the morphological, electrical and optoelectronic ***, the annealed CZTS film can be efficiently used as an absorber layer in low-cost thin film solar cells.

关键词： CZTS Copper concentration Nanoparticles Thin film Annealing

Evaluation of ligninolytic activity in spent mushroom substrate from four cultivated mushrooms

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Journal of Bioresources and Bioproducts 2022年第4期7卷 288-294页

作者： Ana marión pérez-chávez maría melisa Alberti Edgardo Albertó laboratory of mycology and mushroom Cultivation.Instituto Tecnológico de chascomús(INTEch) Universidad Nacional de San Martín(UNSAM)-Consejo Nacional de Investigaciones Científicas y Técnicas(CONICET)Intendente Marino AveCC 164.7130ChascomúsBuenos AiresArgentina

Spent mushroom substrate(SmS)is an abundant residue generated by the mushroom industry,which is mostly *** this study,the SmS of four cultivated mushrooms were evaluated as potential sources of ligninolytic *** ostreatus,***,*** and ganoderma lucidum were cultivated in two different substrates to determine growth,mushroom yields and ligninolytic activity of laccase(lac)and manganese peroxidase(mnp).maximum activities in the SmS were 3.731 U/g lac and 0.191 U/g mnp,both for *** mushroom substrates were also analyzed,and higher activities were found in almost all samples.A correlation test between mushroom yields and ligninolytic activities of each culture was made,and we found that high enzymatic activity in the substrate did not result in high mushroom productivity or vice *** SmS was a good source of ligninolytic *** activity depended on the mushroom species and its affinity to the substrate,and it was not influenced by the mushroom *** of mushrooms in diverse lignocellulosic substrates is gaining interest,and ob-taining ligninolytic enzymes from residual SmS is an excellent alternative in the circular economy concept.

关键词： laccase manganese peroxidase Biological efficiency pleurotus spp ganoderma lucidum Circular economy

Improvement in estimation of soil water deficit by integrating airborne imagery data into a soil water balance model

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International Journal of Agricultural and Biological Engineering 2017年第3期10卷 37-46页

作者： Huihui Zhang ming Han José l.chávez Yubin lan Water management and Systems Research Unit USDA-ARS2150 Centre AvenueBldg.D.Fort CollinsCO80526USA Department of Civil and Environmental Engineering Colorado State UniversityCampus Delivery 1372Fort CollinsCO80523USA College of Engineering South China Agricultural University/Engineering Research Center for Agricultural Aviation Application(ERCAAA)Guangzhou 510642China

In this study,an approach that integrates airborne imagery data as inputs was used to improve the estimation of soil water deficit(SWD)for maize and sunflower grown under full and deficit irrigation *** proposed model was applied to optimize the maximum total available soil water(TAWr)by minimizing the difference between a water stress coefficient ks and crop water stress index(1-CWSI).The optimal value of maximum TAWr was then used to calibrate a soil water balance model which in turn updated the estimation of soil water *** estimates of SWD in the soil profile of both irrigated maize and sunflower fields were evaluated with the crop root zone SWD derived from neutron probe measurements and the FAO-56 SWD *** results indicated a good agreement between the estimated SWD from the proposed approach and measured SWD for both maize and *** statistical analyses indicated that the maximum TAWr estimated from CWSI significantly improved the estimates of SWD,which reduced the mean absolute error(mAE)and root mean square error(RmSE)by 40%and 44%for maize and 22%for sunflower,compared with the FAO-56 *** proposed procedure works better for crops under deficit irrigation *** the availability of higher spatial and temporal resolution airborne imagery during the growing season,the optimization procedure can be further improved.

关键词： soil water deficit soil water balance model airborne imagery total available water CWSI deficit irrigation