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Plant cover as an estimator of above-ground biomass in semi-arid woody vegetation in northeast Patagonia,Argentina

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Journal of Arid Land 2021年第9期13卷 918-933页

作者： Laura B RODRIGUEZ silvia S torres ROBLES Marcelo F ARTURI Juan M ZEBERIO Andrés C H GRAnD néstor I GASPARRI national University of Río negro Atlantic HeadquartersCenter for Environmental Studies from Norpatagonia(CEANPa)Viedma 8500Argentina national Council of Scientific and Technical Research(COnICET) Viedma 8500Argentina Ecological and Environmental Systems Research Laboratory(LISEA) National University of La PlataLa Plata 1900Argentina national Institute of Agricultural Technology(InTA) AER PatagonesCarmen de Patagones 8504Argentina Institute of Regional Ecology(IER) National University of Tucumán(UNT)-National Council of Scientific and Technical Research(CONICET)Tucumán 4000Argentina Faculty of natural Sciences and Miguel Lillo Institute National University of Tucumán(UNT)Yerba Buena 4107Argentina

The quantification of carbon storage in vegetation biomass is a crucial factor in the estimation and mitigation of CO2 ***,arid and semi-arid regions are considered an important carbon ***,they have received limited attention and,therefore,it should be a priority to develop tools to quantify biomass at the local and regional *** plant variables,such as stem diameter and crown area,were reported to be good predictors of individual plant ***-level variables,such as plant cover and mean height,are also easy-to-measure estimators of above-ground biomass(AGB)in dry *** this study,we estimated the AGB in semi-arid woody vegetation in northeast Patagonia,*** evaluated whether the AGB at the stand level can be estimated based on plant cover and to what extent the estimation accuracy can be improved by the inclusion of other field-measured structure *** also evaluated whether remote sensing technologies can be used to reliably estimate and map the regional mean *** this purpose,we analyzed the relationships between field-measured woody vegetation structure variables and AGB as well as LAnDSAT TM-derived *** obtained a model-based ratio estimate of regional mean AGB and its standard *** plant cover allowed us to obtain a reliable estimation of local AGB,and no better fit was attained by the inclusion of other structure *** stand-level plant cover ranged between 18.7%and 95.2%and AGB between about 2.0 and 70.8 Mg/hm^(2).AGB based on total plant cover was well estimated from LAnDSAT TM bands 2 and 3,which facilitated a model-based ratio estimate of the regional mean AGB(approximately 12.0 Mg/hm^(2))and its sampling error(about 30.0%).The mean AGB of woody vegetation can greatly contribute to carbon storage in semi-arid ***,plant cover estimation by remote sensing images could be used to obtain regional estimates and map biomass,as well as to assess and monitor the i

关键词： above-ground biomass shrublands ratio estimation carbon storage remote sensing Patagonia

Prevalence of and risk factors for erectile dysfunction in young nondiabetic obese men:results from a regional study

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Asian Journal of Andrology 2020年第4期22卷 372-378页

作者： María Molina-Vega Maite Asenjo-Plaza María JoséBanderas-Donaire María Dolores Hernández-Ollero silvia Rodríguez-Moreno Juan Jálvarez-Millán Pablo Cabezas-Sanchez Fernando Cardona-Díaz Juan Alcaide-torres Lourdes Garrido-Sánchez Daniel Castellano-Castillo Francisco J Tinahones JoséC Fernández-García Department of Endocrinology and nutrition Virgen de la Victoria University Hospital(IBIMA)Málaga UniversityMálaga 29010Spain Centro de Investigación Biomédica en Red de la Fisiopatología de la Obesidad y nutrición(CIBEROBn) Instituto de Salud Carlos IIIMadrid 28029Spain Cruz de Humilladero Primary Care Center Málaga 29010Spain Teatinos Primary Care Center Málaga 29010Spain Chemical Sanitary Consulting(CQS Lab) Madrid 28003Spain

Erectile dysfunction(ED),a condition closely related to cardiovascular morbidity and mortality,is frequently associated with *** this study,we aimed to determine the prevalence of ED and evaluate the associated risk factors in a cohort of 254 young(18–49 years)nondiabetic obese(body mass index[BMI]≥30 kg m−2)men from primary *** function(International Index of Erectile Function[IIEF-5]questionnaire),quality of life(Aging Males'Symptoms[AMS scale]),and body composition analysis(Tanita MC-180MA)were *** testosterone was determined using high-performance liquid chromatography–mass *** logistic regression analysis was used to study the factors associated with *** prevalence was 42.1%.Subjects with ED presented higher BMI,waist circumference,number of components of the metabolic syndrome,AMS score,insulin resistance,and a more unfavorable body composition than those without *** logistic regression analysis showed that a pathological AMS score(odds ratio[OR]:4.238,Pnsity lipoprotein(HDL)-cholesterol levels(OR:0.956,P=0.004),and age(OR:1.047,P=0.016)were factors independently associated with *** conclusion,we demonstrate that,in a primary care-based cohort of nondiabetic young obese men,ED affected>40%of subjects.A pathological AMS score,the degree of obesity,and age were positively associated with ED,while elevated HDL-cholesterol levels were inversely associated with the odds of presenting *** prospective studies are needed to evaluate the long-term consequences of ED in this population.

关键词： Aging Males'Symptoms score erectile dysfunction International Index of Erectile Function-5 questionnaire obesity testosterone

First histopathological study in kidneys of rodents naturally infected with Leptospira pathogenic species from Yucatan, Mexico

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Asian Pacific Journal of Tropical Medicine 2016年第2期9卷 140-142页

作者： Marco torres-Castro Leonardo Guillermo-Cordero silvia Hernández-Betancourt Edwin Gutiérrez-Ruíz Piedad Agudelo-Flórez Ronald Peláez-Sánchez Jorge Zavala-Castro Fernando I.Puerto Centro de Investigaciones Regionales ‘Dr.Hideyo noguchi' Universidad Autónoma de Yucatán Campus de Ciencias Biológicas y Agropecuarias Universidad Autónoma de Yucatán Facultad de Medicina Universidad CES

Objective: To report the renal histological lesions in synanthropic rodents, Mus musculus and Rattus rattus, naturally infected with Leptospira spp., captured in a rural community in Yucatan, Mexico. Methods: Kidney samples of synanthropic rodents were collected from a rural community in Yucatan, Mexico. Polymerase chain reaction was used to detect Leptospira spp. infection. Tissue kidney was fixed in 10% buffered formalin, processed according to the usual techniques for paraffin inclusion, cut and stained with hematoxylin and eosin, and examined using a conventional electronic microscope. Results: A total of 187 rodents were captured. nine individuals(4.8%) were positive for Leptospira spp. in the molecular analysis. All renal lesions observed in the histopathological study had been reported previously for Leptospira spp. infection. Conclusions: The histopathological lesions are present in the kidneys, plus the results of the polymerase chain reaction confirm that these rodents are true carriers of Leptospira spp.

关键词： Leptospira spp. Renal histopathological lesions Mus musculus Rattus rattus

Food and nutritional Insecurity before and during the COVID-19 Pandemic in Households of Women Belonging to a Social Program

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Food and nutrition Sciences 2021年第7期12卷 742-758页

作者： Monserrat Méndez-Pérez Rebeca Monroy-torres silvia Delgado-Sandoval Karen Medina-Jiménez Laboratorio de nutrición Ambiental y Seguridad Alimentaria. Departamento de Medicina y nutrición Universidad de Guanajuato Campus León Leon Mexico Observatorio Universitario de Seguridad Alimentaria y nutricional del Estado de Guanajuato Leon Mexico División de Ciencias de la Salud e Ingenierías Universidad de Guanajuato Campus Celaya-Salvatierra Celaya México

Introduction: According to the national Health and nutrition Survey, the Mexican households in 2018 had food insecurity at 55.5% while in 2012 it was 70%. Food insecurity is a global health problem and now with the CO... 详细信息

Introduction: According to the National Health and Nutrition Survey, the Mexican households in 2018 had food insecurity at 55.5% while in 2012 it was 70%. Food insecurity is a global health problem and now with the COVID-19 pandemic, it has increased. Objective: To compare the levels of food and nutritional insecurity in women’s households from two Social Impulse Centers of the Secretary for Human Social Development (SEDESHU) before and during the COVID-19 pandemic. Methods: A comparative an>nd cross-sectional study was carried out in 41 women participating in a nutritional intervention program in two social promotion centers. Food security was measured with the Latin American and Caribbean Food Security Scale (ELCSA), comparing it in a period from January to April 2020: before and during the health contingency. Socio-economic and demographic variables were also measured, as well as access to water during the COVID-19 pandemic. Results: Food insecurity levels during the COVID-19 contingency were found to have increased by more than 60% (from 31.7% to 93%);the main risk factors associated with unemployment and access to healthy food. The COVID-19 contingency reflects impacts on households, but because women participated in the nutritional intervention program, it could influence by observing that, at least, the use of food was adequate since apparently food waste was minimal. n style="font-famil

关键词： Food Insecurity Access Water Loss Employment COVID-19 Social Pro-grams

Low phase angle is associated with the development of hepatic encephalopathy in patients with cirrhosis

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World Journal of Gastroenterology 2016年第45期22卷 10064-10070页

作者： Astrid Ruiz-Margáin Ricardo Ulises Macías-Rodríguez Javier Ampuero Francisco Javier Cubero Luis Chi-Cervera silvia L Ríos-torres Andrés Duarte-Rojo Ángeles Espinosa-Cuevas Manuel Romero-Gómez Aldo Torre Department of Gastroenterology Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán14080 México City México Department of Internal Medicine Ⅲ University Hospital RWTH Aachen52074 Aachen Germany Unit for the Clinical Management of Digestive Diseases Virgen del Rocio-Virgen Macarena University Hospital41009 Sevilla Spain Department of Immunology Complutense University School of Medicine28040 Madrid Spain University of Arkansas for Medical Sciences Little Rock AR 72205 United States Department of nephrology and Mineral Merabolism Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán México City 14080 México

AIM Evaluate the association between phase angle and the development of hepatic encephalopathy in the longterm follow-up of cirrhotic *** This was a prospective cohort study. Clinical, nutritional and biochemical evaluations were performed. MannWhitney's U and χ2 tests were used as appropriate. Kaplan-Meier curves and Cox proportional Hazards analysis were used to evaluate the prediction and incidence of hepatic *** Two hundred and twenty were included; the most frequent etiology of cirrhosis was hepatitis C infection, 52% of the patients developed hepatic encephalopathy(18.6% covert and 33.3% overt); the main precipitating factors were infections and variceal bleeding. KaplanMeier curves showed a higher proportion of HE in the group with low phase angle(39%) compared to the normal phase angle group(13%)(P = 0.012). Furthermore, creatinine and phase angle remained independently associated to hepatic encephalopathy in the Cox regression multivariate analysis [hazard ratio = 1.80(1.07-3.03)]. COnCLUSIOn In our cohort of patients low phase angle was associated with an increased incidence of hepatic encephalopathy. Phase angle is a useful nutritional marker that evaluates cachexia and could be used as a part of the integral assessment in patients with cirrhosis.

关键词： Malnutrition Hepatic encephalopathy Phase angle Cachexia Prognosis

Life Cycle Assessment of Hydrogel Used in Hydroponics for the Impatiens new Guinea Production

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Open Journal of Applied Sciences 2016年第5期6卷 310-314页

作者： silvia Paola Venegas Segura Martha Lilia Domínguez Patiño Miguel Aguilar Cortes Jorge Avelino Domínguez Patiño Luz Elva Marín Vaca nadia Lara Ruiz Rosa María Melgoza Alemán Oscar Gabriel Villegas torres Facultad de Ciencias Químicas e Ingeniería Universidad Autónoma del Estado de Morelos Cuernavaca México Centro de Investigación en Ingeniería y Ciencias Aplicadas Universidad Autónoma del Estado de Morelos Cuernavaca México Facultad de Ciencias Agropecuarias Universidad Autónoma del Estado de Morelos Cuernavaca México

The environmental impact on the planet leads to the search of new processes that are friendly with the environment and obtaining high quality products. In this sense, green chemistry is used in the generation of products through processes that do not affect the planet. In many of these processes and in general, the use of water has been depleted this resource of vital importance for the survival of living things. In Mexico, 77% of water is used in agriculture;14% in the public supply;5% in the thermoelectric plants and 4% in the industry. In research presented, hydroponics is essential in the process and is defined as a technique used to reduce excessive water consumption, by providing the necessary nutrients, in addition to preventing soil erosion by allowing the growth of plants without use of ground. The potassium polyacrylate is a super-absorbent polymer (Hydrogel) capable of absorbing water up to 500 times of its weight and has a life span of 10 years. When mixed with a substrate, the required nutrient solution potassium polyacrylate allows to lengthen the interval watering and thus reducing the consumption of water from plants. Morelos is the largest producer of ornamental plants in the country, due to its privileged climate and location. In the present work using the hydroponic methodology, we planted cuttings of Bethlehem new Guinea (Impatiens new Guinea) in a substrate made by 60% of coconut fiber, 20% tepojal, 20% ground sheet mixed with polymer of potassium (20 g per litre), 400 ml of Steiner nutrient solution in concentrations of 40%, 60%, 80% and 100%, varying the interval of 3-, 6-, 8- and 10-day watering. The variables considered are: concentration of chlorophyll, the plant height, leaf area, number of stems and weight dry total. The 12 principles of green chemistry applied to hydroponics using polyacrylate of potassium as part of the substrate in Bethlehem new Guinea (Impatiens new Guinea) to determine the analysis of life cycle (LCA), doing the bala

关键词： Steiner Solution Environmental Impact SimaPro

Effect of non-alcoholic beer,diet and exercise on endothelial function,nutrition and quality of life in patients with cirrhosis

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World Journal of Hepatology 2020年第12期12卷 1299-1313页

作者： Ricardo U Macias-Rodriguez Astrid Ruiz-Margain Berenice M Roman-Calleja May E Espin-nasser nayelli CFlores-Garcia Aldo Torre Gretel Galicia-Hernandez silvia L Rios-torres Gabriela Fernandez-del-Rivero Arturo Orea-Tejeda Oscar A Lozano-Cruz Department of Gastroenterology Instituto Nacional de Ciencias Médicas y Nutrición Salvador ZubiranMexico City 14080Mexico Liver Fibrosis and nutrition Lab(LFn-Lab) MICTLÁN Network:Mechanisms of Liver InjuryCell Death and Translational Nutrition in Liver Diseases-Research NetworkMexico City 14080Mexico Department of Cardiology Instituto Nacional de Enfermedades RespiratoriasMexico City 14080Mexico Department of Internal Medicine Instituto Nacional de Ciencias Médicas y Nutrición Salvador ZubiranMexico City 14080Mexico

BACKGROUnD The implementation of nutritional strategies targeting several variables at once could benefit patients with ***-alcoholic beer has different compounds that exert antioxidant,anti-inflammatory and nutritional *** To evaluate the effect of diet+exercise and non-alcoholic beer on nutritional status,endothelial function and quality of life in patients with *** In this randomized open clinical trial,patients with cirrhosis were randomized into two groups:The intervention(non-alcoholic beer+diet+exercise)and control(water+diet+exercise)*** consisted of 330 mL nonalcoholic beer/day or the same amount of water,plus an individualized dietary plan and an exercise program with a pedometer-based bracelet to reach at least 5000 steps/d and>2500 above the baseline during 8 *** function(flow-mediated dilation,plethysmography),biochemical and nutritional variables and quality of life(CLDQ)were *** Forty-three patients were included in the study,21 in the control group and 22 in the intervention *** mean age was 53.5±7.8 years,60%were women,the median MELD score was 8(7-10)and most patients were Child-Pugh A(88%).Adherence to the interventions was>90%in both groups,there were no adverse events and all biochemical parameters remained stable in both *** function improved in both *** measured nutritional parameters improved in the intervention group,compared to only 2 in the control group and quality of life improved in both groups;however,more domains improved in the intervention *** The intervention consisting of non-alcoholic beer,diet and exercise seems to be safe and well tolerated in patients with cirrhosis,and shows improvement in nutritional status,endothelial function,and quality of *** results need to be further confirmed.

关键词： Hops Portal hypertension Sarcopenia Diet Cirrhosis Antioxidants

Food and nutritional Insecurity before and during the COVID-19 Pandemic in Households of Women Belonging to a Social Program

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Observatory science with eXTP

Food and nutrition Sciences 2021年第7期

作者： Monserrat Méndez-Pérez Rebeca Monroy-torres silvia Delgado-Sandoval Karen Medina-Jiménez

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Science China(Physics,Mechanics & Astronomy) 2019年第2期62卷 97-138页

作者： Jean J.M.in 't Zand Enrico Bozzo JinLu Qu Xiang-Dong Li Lorenzo Amati Yang Chen Immacolata Donnarumma Victor Doroshenko Stephen A.Drake Margarita Hernanz Peter A.Jenke Thomas J.Maccarone Simin Mahmoodifar Domitilla de Martino Alessandra De Rosa Elena M.Rossi Antonia Rowlinson Gloria Sala Giulia Stratta Thomas M.Tauris Joern Wilms XueFeng Wu Ping Zhou Iván Agudo Diego Altamirano Jean-Luc Atteia nils A.andersson M.Cristina Baglio David R.Ballantyne Altan Baykal Ehud Behar Tomaso Belloni Sudip Bhattacharyya Stefano Bianchi Anna Bilous Pere Blay Joao Braga Sφren Brandt Edward F.Brown niccolo Bucciantini Luciano Burderi Edward M.Cackett Riccardo Campana Sergio Campana Piergiorgio Casella Yuri Cavecchi Frank Chambers Liang Chen Yu-Peng Chen Jér?me Chenevez Maria Chernyakova ChiChuan Jin Riccardo Ciolfi Elisa Costantini Andrew Cumming Antonino D'Aì Zi-Gao Dai Filippo D'Ammando Massimiliano De Pasquale nathalie Degenaar Melania Del Santo Valerio D'Elia Tiziana Di Salvo Gerry Doyle Maurizio Falanga XiLong Fan Robert D.Ferdman Marco Feroci Federico Fraschetti Duncan K.Galloway Angelo F.Gambino Poshak Gandhi MingYu Ge Bruce Gendre Ramandeep Gill Diego G?tz Christian Gouiffès Paola Grandi Jonathan Granot Manuel Güdel Alexander Heger Craig O.Heinke Jeroen Homan Rosario Iaria Kazushi Iwasawa Luca Izzo Long Ji Peter G.Jonker Jordi José Jelle S.Kaastra Emrah Kalemci Oleg Kargaltsev nobuyuki Kawai Laurens Keek Stefanie Komossa Ingo Kreykenbohm Lucien Kuiper Devaky Kunneriath Gang Li En-Wei Liang Manuel Linares Francesco Longo FangJun Lu Alexander A.Lutovinov Denys Malyshev Julien Malzac Antonios Manousakis Ian McHardy Missagh Mehdipour YunPeng Men Mariano Méndez Roberto P.Mignani Romana Mikusincova M.Coleman Miller Giovanni Miniutti Christian Motch Joonas nättilä Emanuele nardini Torsten neubert Paul T.O'Brien Mauro Orlandini Julian P.Osborne Luigi Pacciani Stéphane Paltani Maurizio Paolillo Iossif E.Papadakis Biswajit Paul Alberto Pellizzoni Uria Peretz Miguel A.Pérez torres Emanuele Perinati Chanda Prescod-Weinstein Pablo Reig SROn netherlands Institute for Space Research Department of Astronomy University of Geneva Key Laboratory for Particle Astrophysics Institute of High Energy PhysicsChinese Academy of Sciences School of Astronomy and Space Science Nanjing University InAF-IASF Bologna ASI Via del Politecnico snc InAF-Istituto di Astrofisica e Planetologie Spaziali Institut für Astronomie und Astrophysik Tübingen Universit?t Tübingen nASA Goddard Space Flight Center ICREA&Institute of Space Sciences(IEEC-CSIC) Campus UABCarrer de Can Magrans CSPAR SPA University of Alabama in Huntsville Department of Physics Texas Tech University InAF Osservatorio Astronomico di Capodimonte Leiden Observatory Leiden University Anton Pannekoek Institute University of Amsterdam ASTROn netherlands Institute for Radio Astronomy Universitat Politecnica de Catalunya(UPC-IEEC) Universitádegli Studi di Urbino‘Carlo Bo’ Max-Planck-Institut für Radioastronomie Dr.Karl-Remeis-Sternwarte and Erlangen Centre for Astroparticle Physics(ECAP) Friedrich Alexander Universit?t Erlangen-Nurnberg Purple Mountain Observatory Chinese Academy of Sciences Instituto de Astrofysíca de Andalucia-CSIC Department of Physics and Astronomy University of Southampton IRAP Universitéde ToulouseCNRSUPSCNES Mathematical Sciences and STAG Research Centre University of Southampton new York University Abu Dhabi Center for Relativistic Astrophysics School of PhysicsGeorgia Institute of Technology Physics Department Middle East Technical University Department of Physics Technion-Israel Institute of Technology InAF Osservatorio Astronomico di Brera Tata Institute of Fundamental Research Dipartimento di Matematica e Fisica Universitàdegli Studi Roma Tre Instituto de Astrofísica de Canarias Instituto nacional de Pesquisas Espaciais-InPE national Space Institute Technical University of Denmark(DTU Space) Department of Physics and Astronomy Michigan State University InAF Osservatorio Astrofisico di Arcetri Dipartimento di Fisica Universitádegli Studi di Cagliari Department of Physics and A

In this White Paper we present the potential of the enhanced X-ray Timing and Polarimetry(eXTP) mission for studies related to Observatory Science targets. These include flaring stars, supernova remnants, accreting white dwarfs, low and high mass X-ray binaries, radio quiet and radio loud active galactic nuclei, tidal disruption events, and gamma-ray bursts. eXTP will be excellently suited to study one common aspect of these objects: their often transient nature. Developed by an international Consortium led by the Institute of High Energy Physics of the Chinese Academy of Science, the eXTP mission is expected to be launched in the mid 2020s.

关键词： space research in struments nuclear astrophysics flare stars accretion and accretion disks mass loss and stellar winds cataclysmic binaries X-ray binaries supernova remnants active galactic nuclei X-ray bursts gamma-ray bursts gravitational waves