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Fungal contamination of stored automobile-fuels in a tropical environment

Journal of Environmental Sciences 2010年第10期22卷 1595-1601页

作者： Carlos E.Rodríguez-Rodríguez Evelyn Rodríguez Rigoberto Blanco Ivannia Cordero daniel segura Research Center in Tropical Diseases and Laboratory of Research in Anaerobic Bacteriology Faculty of MicrobiologyUniversity of Costa Rica Department of Chemical Engineering School of EngineeringAutonomous University of Barcelona Research Center in Electrochemistry and Chemical Energy University of Costa Rica

Because of the lack of reports, the base levels of microbial contamination on stored fuels are unknown in tropical regions and it is unclear whether these levels have some influence on fuel quality parameters. Therefore, fungal quality in automobile fuels stored across Costa Rican territory was evaluated during two years according to the standard ASTM D6974-04. For a total of 96 samples, counts and identification of molds and yeasts were performed on regular gas, premium gas and diesel taken from the bottom and superior part of the container tanks. The highest contamination was found on the bottom of the tanks, where an aqueous phase was usually identified, showing populations over the ones present in the hydrocarbon itself （up to 108 CFU/L）. Diesel was the most contaminated fuel （up to 107 CFO/L）; however, an alteration on the physicochemical parameters was not observed in any kind of fuel. Seventy-five mold strains were isolated, Penicillium sp. being the most common genus （45.8% of the samples）, and ten yeast strains, from the genera Candida sp. and Rhodotorula sp. Four of the yeasts were able to grow on diesel as the sole carbon source, at concentrations ranging from 0.5% to 25%. Increasing the frequency of tank cleaning, adding antimicrobial agents and monitoring microbial populations are recommended strategies to improve microbial quality of stored fuels.

关键词： fuel microbial contamination biodegradation molds yeasts

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理解视听艺术中的无声:一种分析模型

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世界电影 2021年第2期 4-27页

作者： [西班牙]丹尼尔·托拉斯·伊·塞古拉赫铁龙(译) 庞培法布拉大学高级理工学院庞培法布拉大学声音、无声、图像和技术研究小组上海大学上海电影学院

概述无声是由某些有声形式产生的一种感知效应,①这种感知效应是一种没有声音的感觉与听觉上的放松,可以传达强烈的或特定的叙事情境或场景。本文旨在对这一视听资源进行详细解释以便能够更好地使用无声,以及用更多的工具和理论基础对... 详细信息

概述无声是由某些有声形式产生的一种感知效应,①这种感知效应是一种没有声音的感觉与听觉上的放松,可以传达强烈的或特定的叙事情境或场景。本文旨在对这一视听资源进行详细解释以便能够更好地使用无声,以及用更多的工具和理论基础对其进行分析。

关键词：叙事情境视听资源视听艺术分析模型无声感知效应

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Species diversity of thrips (Thysanoptera) in selected avocado orchards from Mexico based on morphology and molecular data

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Journal of Integrative Agriculture 2018年第11期17卷 2509-2517页

作者： daniel Bravo-Perez Ma. Teresa Santillbn-Galicia Roberto M. Johansen-Naime Hector Gonzalez-Hernandez Obdulia L. segura-Leon daniel L, Ochoa-Martinez Stephanie Guzman-Valencia Posgrado en Fitosanidad-Entomologia y Acarologia Colegio de Postgraduados Km 36.5 Carretera Mexico-Texcoco Montecillo Texcoco Estado de Mexico 56230 Mexico Instituto de Biologia de la Universidad Nacional Autonoma de Mexico (IBUNAM) Circuito exterior s/n Ciudad Universitaria Coyoacan Ciudad de Mexico 04510 Mexico Posgrado en Fitosanidad-Fitopatologia Colegio de Postgraduados Km 36.5 Carretera Mexico-Texcoco Montecillo Texcoco Estado de Mexico 56230 Mexico

Avocado is one of the most important crops in the world, and Mexico is the largest producer of this fruit. Several insect pests affect its production, and thrips are amongst the most important. A key step in the design of control methods is accurate species identification. Despite this, formal reports on species diversity of thrips in Mexico are very scarce. Morphological identification can sometimes be time-consuming and inconclusive. Therefore, we explored the species diversity of thrips in Mexican avocado orchards （Michoacan state） based on partial sequences of the mitochondrial gene cytochrome oxidase subunit I （COl）. Forty-four specimens were analysed, which represented approximately 8% of all individuals collected from five localities distributed in three Municipalities. All specimens were analysed using the COl marker, and specimens within the genera Frankliniella were also analysed using a marker within the D2 domain of the 28S （28SD2） nuclear ribosomal DNA. Molecular identifications were confirmed using morphological taxonomy. Overall, six genera were found （Neohydatothrips, Scirtothrips, Frankliniella, Arorathrips, Caliothrips and Leptothrips）. AII genera contained only one species, except Frankliniella, for which there were six species. Data from the two molecular markers suggest the existence of cryptic species within Mexican F. occidentalis populations.

关键词： molecular taxonomy morphological identification cytochrome oxidase subunit I 28S nuclear ribosomal DNA.

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Gut microbiota in a population highly affected by obesity and type 2 diabetes and susceptibility to COVID-19

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World Journal of Gastroenterology 2021年第41期27卷 7065-7079页

作者： Jaime García-Mena Karina Corona-Cervantes daniel Cuervo-Zanatta Tizziani Benitez-Guerrero JuanManuel Vélez-Ixta Norma Gabriela Zavala-Torres Loan Edel Villalobos-Flores Fernando Hernández-Quiroz Claudia Perez-Cruz Selvasankar Murugesan Fernando Guadalupe Bastida-González Paola Berenice Zárate-segura Departamento de Genética y Biología Molecular Centro de Investigación y de Estudios Avanzados del Instituto Politécnico NacionalMexico City 07360CDMXMexico Departamento de Genética y Biología Molecular and Departamento de Farmacología Centro de Investigación y de Estudios Avanzados del Instituto Politécnico NacionalMexico City 07360CDMXMexico Departamento de Farmacología Centro de Investigación y de Estudios Avanzados del Instituto Politécnico NacionalMexico City 07360CDMXMexico Department of Mother and Child Health SIDRA MedicineDoha 26999Qatar Laboratorio Estatal de Salud Pública del Estado de México ISEMToluca de Lerdo 50180Estado de MéxicoMexico Escuela Superior de Medicina Instituto Politécnico NacionalMexico City 11340CDMXMexico

Coronavirus disease 2019(COVID-19)is a disease produced by severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)and it is currently causing a catastrophic pandemic affecting humans *** disease has been lethal for approximately 3.12 million people around the world since January ***,among the most affected countries,Mexico ranks third in deaths after the United States of America and *** the high number of deceased people might also be explained by social aspects and lifestyle customs in Mexico,there is a relationship between this high proportion of deaths and comorbidities such as high blood pressure(HBP),type 2 diabetes,obesity,and metabolic *** official epidemiological figures reported by the Mexican government have indicated that 18.4%of the population suffers from HBP,close to 10.3%of adults suffer from type 2 diabetes,and approximately 36.1%of the population suffers from *** in the gut microbiota(GM)have been associated with these diseases and with COVID-19 severity,presumably due to inflammatory *** data about the association between GM dysbiosis and metabolic diseases could suggest that the high levels of susceptibility to SARSCoV-2 infection and COVID-19 morbidity in the Mexican population are primarily due to the prevalence of type 2 diabetes,obesity,and metabolic syndrome.

关键词： SARS-CoV-2 COVID-19 High blood pressure Hypertension Type 2 diabetes Obesity Metabolic syndrome Gut microbiota Immunity

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