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Morphological Characterization in Wild Species of Heliconias(Heliconia spp)in Mexico

American Journal of Plant Sciences 2017年第6期8卷 1210-1223页

作者： Carlos Hugo Avendano-Arrazate Jorge Alberto Arrazate-Argueta Simitrio Ortíz-Curiel Esaú Moreno-Pérez leobardo iracheta-donjuan Delfino Reyes-López Manuel Grajales-Solís Misael Martínez-Bola?os Moises Cortés-Cruz National Forestry Crops and Livestock Research Institute(INIFAP)-Experimental Station Rosario IzapaTuxtla ChicoMexico Postgraduate College Postgraduate in EdafologyMontecilloMexico Autonomus University of Chapingo Departament of FitotecniaChapingoMexico Autonomus University of Puebla TeziutlanMexico National Genetic Resources Center–INIFAP TepatitlanMexico

In Mexico, the utilization of native heliconias germplasm for preservation and genetic improvement purposes, has been limited partly because of the unawareness between their population similarities and differences, and because of the degree of genetic divergence that exists among the interspecific and intraspecific ecotypes originated from different regions of the humid tropics. The objective of the present study was to morphological characterization wild species of the genus Heliconias in Mexico through some qualitative and quantitative morphological descriptors. Fifty-five qualitative and quantitative morphological characters were studied in 25 accessions from 11 native species. Characters of plant, leaf, inflorescence, flower, fruit, and seed were taken into account. Data was analyzed by Principal Component Analysis (PCA) and Hierarchical Cluster Analysis. Two analyses were carried out: the first one was for the 25 accessions that included characters of flower (55 variables), whereas the second was for only 19 accessions (66 variables) concluded until seed. The first six components explained a 69.4% of the total variation based on PCA. The variables which contributed most significantly were: leaf length (p < 0.001), limb width (p < 0.001), limb's petiole length (p < 0.001), pseudostem thickness (p < 0.05)/width at 60 cm (p < 0.05), rachis width (p < 0.05)/thickness (p < 0.001), second bract width (p < 0.001), growth (p < 0.001) and type of inflorescence (p < 0.05), petiole (p < 0.05) and peduncle length (p < 0.05), rachis color (p < 0.05), and wax in limb (p < 0.05) and in pseudostem (p < 0.05). Thirty-eight descriptors were suggested to differentiate wild species of heliconias in Mexico.

关键词： Heliconia Morphological Descriptors Principal Components

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Suppression Effects on Pineapple Soil-Borne Pathogens by Crotalaria juncea,Dolomitic Lime and Plastic Mulch Cover on MD-2 Hybrid Cultivar

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Phyton-International Journal of Experimental Botany 2021年第4期90卷 1205-1216页

作者： Luis Alfonso Aguilar Pérez Daniel NietoÁngel Moisés Roberto Vallejo Pérez Daniel leobardo Ochoa Martínez David Espinosa Victoria Andrés Rebolledo Martinez Abel Rebouças São José Fitopatología Colegio de PostgraduadosMontecillo-Texcoco56230México CONACyT-Universidad Autónoma de San Luis Potosí CIACYTSan Luis Potosí78000México Edafología Colegio de PostgraduadosMontecillo-Texcoco56230México Instituto Nacional de Investigaciones Forestales Agrícolas y PecuariasVeracruz94270México Rebouças São José A.UESB/DFZVitória da Conquista95Brasil

The development and implementation of sustainable and environmentally friendly agricultural practices are indispensable as alternatives to pesticide use and to keep populations of soil-borne plant pathogens at levels that do not affect crop *** present research evaluates the incidence of soil-borne phytopathogens on the pineapple variety MD-2,which was subjected to different treatments:Incorporation of Crotalaria juncea into the soil(organic amendment),application of dolomitic lime to soil(inorganic amendment),and the use of plastic mulch covering the *** the crop cycle(15 months),the following variables were evaluated:plant height(cm),fruit weight(kg·plant^(−1)),crop yield(ton·ha^(−1)),the bud root disease incidence caused by Phytophthora nicotianae,number of soil phytoparasitic nematodes and colony-forming-units(CFUs)of soil fungi and *** results indicate that Crotalaria juncea treatment reduced the pathogen population(nematode and oomycetes)at levels that did not affect crop development,so that yield increased(18–20%).The incorporation of *** into the soil as an organic amendment favors the populations of fungi disease suppressors(Trichoderma-Aspergillus).The phytoparasitic nematodes(Meloidogyne sp.,Pratylenchus sp.,and Mesocriconema sp.)and oomycetes(Phytophthora spp.,and Pythium spp.)showed a reduction of their population levels by effects of organic amendment(***).The plastic mulch was also effective,probably due to the maintenance of optimal condition to crop growth and weed ***,the dolomitic lime application had the poorest effect under the conditions of the study area on the variables *** described observations are characteristics of a system-based approach for the potential management of soil-borne pathogens of pineapple MD-2 in Veracruz,México.

关键词： Suppressive soil integrated pest management Phytophthora nicotiannae Phytoparasitic nematodes

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Removal of Aqueous Lead and Copper Ions by Using Natural Hydroxyapatite Powder and Sulphide Precipitation in Cyanidation Process

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Materials Sciences and Applications 2013年第4期4卷 231-237页

作者： José Refugio Parga Jesús leobardo Valenzuela Víctor Vazquez Mario Rodriguez Héctor Moreno Departament of Chemical Engineering and Metallurgy University of Sonora Hermosillo Mexico Department of Chemistry Institute Technology of Laguna Torreon Mexico Department of Metallurgy and Materials Science Institute Technology of Saltillo Saltillo Mexico

Mining, ore processing, and smelting activities have contaminated soil and water resources with cyanide and heavy metals throughout the world. In-situ chemical immobilization is a remediation technology that decreases the concentrations of dissolved ions of copper cyanide and lead hydroxides by adsorption or precipitation. This study deals, with a process to recover lead hydroxides with natural hydroxyapatite powder and copper cyanide ions with sulphide precipitation from solutions of the cyanidation process. This technology is based on inducing nucleated precipitation of copper and silver in a serpentine reactor, using sodium sulfide as the precipitator, and sulfuric acid for pH control. Results show that pH value has a significant effect on copper cyanide removal efficiency, and it was determined the optimal pH range to be 2.5 - 3. At this pH value, the copper cyanide removal efficiency achieved was up to 99% with 60 percent of copper purity and the cyanide ions associated with this complex the recovery was 90%. For the elimination of lead hydroxides ions from the aqueous cyanidation process with natural hydroxiapatite powder the recovery was 99%. The abundance of cow bones, its low price and non-aggressive nature towards the environment are advantages for its utilization in point of view of wastewater cleanup and Dore with higher quality.

关键词： Natural Hydroxyapatite Sulphide Precipitation Zinc Cementation

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Effect of Chia Seed on Physicochemical and Sensory Characteristics of Common Carp Restructured as Functional Food

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Journal of Food Science and Engineering 2017年第3期7卷 115-126页

作者： Angel Santillan-Alvarez Octavio Dublain-Garcia Leticia Xochitl Lopez-Martinez Baciliza Quintero-Salazar leobardo Manuel Gomez-Olivan Daniel Diaz-Bandera Maria Dolores Hemandez-Navarro Department of Food Science and Toxicology Facultad de Quimica Universidad Autonoma del Estado de Mexieo Estado deMexico Mexico Centro de Investigacion en Alimentaciony Desarrollo A. C. Culiacon Sinaloa Mexico Department of Food Science Facultad de Turismo y Gastronomia Universidad Autonoma del Estado de Mexico Estado deMexico Mexico

Physicochemical and sensory characteristics of restructured meat of common carp （Cyprinus carpio） fortified with 0-8 g/100 g of chia seed flour （CSF） was evaluated. It had a higher nutritional value （higher fibre content and protein retention] （p 〈 0.05） and better cooking characteristics （higher cooking yield and moisture retention）（p 〈 0.05） than the control. The colour （a＊, b＊） increased; lightness and whiteness index decrease （p 〈 0.05）. Hardness increase （p 〈 0.05） occurred because of CSF addition. Differential scanning calorimetry showed that fibre fortification did not interfere with the thermal transitions of the restructured meat. No significant differences were detected with the preference test scores of 4% or 8% CSF compared with the control. Restructured （4%-8% CSF） had a higher content of fibre and fat, which could be linoleic and linolenic acid, and an increase in the content of protein compared with those of commercial products, among had 1.62 and 2.25 mg AGE/g. Therefore, the restructured properties of common carp were governed by CSF addition.

关键词： Protein gel common carp chia seeds restructured meat physicochemical properties.

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An Integrated ISFET pH Microsensor on a CMOS Standard Process

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Journal of Sensor Technology 2013年第3期3卷 57-62页

作者： Francisco López-Huerta Rosa María Woo-Garcia Miguel Lara-Castro Johan Jair Estrada-López Agustín leobardo Herrera-May Faculty of Electronics Sciences Meritorious Autonomous University of Puebla Puebla Mexico Faculty of Mathematics Autonomous University of Yucatán Mérida Mexico Research Center for Micro and Nanotechnology University of Veracruz Veracruz Mexico

We present the design and integration of a nine-pH microsensor array on a single silicon substrate with its own signal readout circuit, integrated in a 0.6-μm commercial standard complementary metal oxide semiconductor (CMOS) process. An ion sensitive field effect transistor (ISFET) has been used as pH microsensor and an instrumentation amplifier as the read-out circuit. The ISFET structure is conformed by the channel length and ratio of MOS transistor, gate extended and the selective membrane, for which silicon nitride (Si3N4) is employed as an ion selective element. The complete design includes shielding around the pH microsensor and the readout circuit to avoid leakage of current to the substrate. The readout circuit is composed by three operational amplifiers and resistances that form the instrumentation amplifier, with a ±2.5 V bias has a 50 dB gain, power supply rejection ratio (PSSR) of 120 dB and common mode rejection ratio (CMRR) of 127 dB. The complete system is integrated in a 1.12 mm2 silicon area;it presents a 59 mV/pH linearity, within a concentration range of 2 to 12 of pH level, making it a good alternative for biological or medical applications.

关键词： CMOS Instrumentation Amplifier ISFET pH

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Oxidative stress in brickmakers of Juárez City, Chihuahua, México: Case-control study

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Advances in Bioscience and Biotechnology 2012年第7期3卷 1051-1059页

作者： leobardo Manuel Gómez-Oliván Alba Yadira Corral-Avitia Katya Aimeé Carrasco-Urrutia Navor Armando González-Granados Marcela Galar-Martínez Nadia Neri-Cruz Hariz Islas-Flores Octavio Dublan-García Facultad de Enfermería y Nutriología Universidad Autónoma de Chihuahua Chihuahua México Laboratorio de Ciencias Ambientales Instituto de Ciencias Biomédicas Universidad Autónoma de Ciudad Juárez Juárez México Laboratorio de Toxicología Acuática Departamento de Farmacia Escuela Nacional de Ciencias Biológicas Instituto Politécnico Nacional México City México Laboratorio de Toxicología Ambiental Facultad de Química Universidad Autónoma del Estado de México Toluca México

A case-control study was conducted in a brickmaker’s community in Juarez City, Chihuahua in Mexico. This population has been chronically exposed to a wide spectrum of potentially health-damaging pollutants that include coarse, fine and ultrafine particles, carbon monoxide (CO), oxides of nitrogen and sulphur, transitional metals, polycyclic aromatic hydrocarbons (PAHs), volatile organic compounds and bioaerosols. Lipid peroxidation level (LPX) and protein carbonyl content (PCC) help to evaluate oxidized protein content and activity of the antioxidant enzymes: superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPx) were evaluated in blood samples of study participants. The group of occupationally exposed (OE) workers consisted of 30 individuals ranging in age from 25 to 55 years, with a mean of 15 years in a brick production-related job. The control group included 30 volunteers who were neither environmentally nor occupationally exposed to brick production activities and whose sociodemo-graphic characteristics were similar to the OE group. Results indicate that none of workers used any type of protective equipment (respirator or face mask, gloves, coveralls) during brick manufacturing. LPX and PCC significantly increased (p < 0.5) in the OE group compared to the control group. SOD, CAT and GPx activity was significantly increased (p < 0.5) in the OE group compared to the control group. Therefore, evaluation of stress oxidative biomarkers is advisable in order to assay chronic exposure to workers in brick manufacturing.

关键词： Oxidative Stress Brickmakers Chronic Exposure Biomarkers Juárez City

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