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Assessing above-ground biomass-functional diversity relationships in temperate forests in northern Mexico

Forest Ecosystems 2021年第1期8卷 95-108页

作者： Benedicto Vargas-Larreta Jorge Omar López-Martínez edgar J.gonzález JoséJavier Corral-Rivas Francisco Javier Hernández Tecnológico Nacional de México/Instituto Tecnológico de El Salto 34942 El SaltoDurangoMexico Cátedras CONACYT1582Av.Insurgentes SurCiudad de MéxicoMexico El Colegio de la Frontera Sur 77014ChetumalQuintana RooMexico Departamento de Ecología y Recursos Naturales Facultad de CienciasUniversidad Nacional Autónoma de MéxicoCiudad de MéxicoMexico Facultad de Ciencias Forestales Universidad Juárez del Estado de DurangoRío Papaloapan y Blvd.Durango s/nCol.Valle del Sur34120 DurangoMexico

Background:Studies on the relationship between biodiversity and ecosystem productivity have suggested that species richness and functional diversity are the main drivers of ecosystem *** patterns on this relationship have been found,including positive,unimodal,negative,and neutral trends,keeping the issue *** this study,taxonomic diversity and functional diversity as drivers of above-ground biomass(AGB)were compared,and the mechanisms that influence biomass production were investigated by testing the complementarity and the mass-ratio ***:Using data from 414 permanent sample plots,covering 23%of temperate forest in the Sierra Madre Oriental(México),we estimated the above-gound biomass(AGB),taxonomic and functional diversity indices,as well as community weighted mean values(CWM)for three functional traits(maximum height,leaf size and wood density)for trees≥7.5 cm DBH,in managed and unmanaged *** compare taxonomic diversity differences between managed and unmanaged stands we carried out a rarefaction ***,we evaluated the relationship between AGB and taxonomic and functional diversity metrics,as well as CWM traits throught spatial autoregressive ***:We found a hump-shaped relationship between AGB and species richness in managed and unmanaged *** of maximum height was the most important predictor of AGB in both stands,which suggested that the mechanism underlaying the AGB-diversity relationship is the dominance of some highly productive species,supporting the mass-ratio ***-ground biomass was significantly correlated with three of the five functional diversity metrics,CWM maximum height and species *** results show the importance of taking into account spatial autocorrelation in the construction of predictive models to avoid spurious patterns in the AGBdiversity ***:Species richness,maximum height,functional richness,functional dispersion and Rao

关键词： Taxonomic diversity Functional diversity Complementarity hypothesis Mass-ratio hypothesis

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Modeling the Effects of Interactions between Environmental Variables on the State of an Environmental Issue: The Case of the Morelos State in Mexico

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Journal of Environmental Protection 2015年第3期6卷 225-236页

作者： Fernando Ramos-Quintana Deny L. Hernández-Rabadán Enrique Sánchez-Salinas María Laura Ortiz-Hernández María Luisa Castrejón-Godínez edgar Dantán-gonzález Biotechnology Research Center Autonomous University of the Morelos State Cuernavaca México Graduate Program in Computer Science Instituto Tecnológico y de Estudios Superiores de Monterrey (ITESM) Xochitepec México

An important use of environmental indicators is oriented to know their individual impact on the whole environment quality. Nevertheless, most of the important causes of environment affectations are derived from multiple interactions between indicators which correspond more specifically to the environmental reality. The affectations derived from interactions should be analyzed and interpreted through numerical expressions representing a relevant challenge for developers of environmental indicators. To cope with the analysis and interpretation problem, we propose in this work a methodology in two senses: in a bottom-up sense a directed graph is built representing interactions between environmental indicators as behavioral relations, which exert an effect on the state of an environmental issue of a site over time (10 years);in a top-down sense to assist users in the analysis and interpretation of interactions through a computer interface that provides users with the capacity of knowing how and what relational behaviors between indicators are affecting, the most or the least, the performance of the environmental issue being studied. This methodology was applied to the analysis an interpretation of interactions between environmental variables that affect the state of an environmental quality issue related with the State of Morelos in Mexico. The results showed the adequate expressivity of a directed graph to represent interactions allowed to verify the coherence of the numerical values associated with their behaviors during a period of time and with their effects on the environmental issue under study.

关键词： Environmental Indicators Graphs Interactions

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Intracerebral Microdialysis in Neurosurgery for Obsessive-Compulsive Disorder: Report of 2 Preliminary Cases

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Open Journal of Modern Neurosurgery 2020年第3期10卷 371-381页

作者： Sergio A. Sacchettoni Rafael Galera Juan F. Del Corral Juan P. Abud Aníbal Pinero Luis Teneud Napoleón Torres Rafael Rojas Pedro Rada Félix Guerrero edgar gonzález Mónica Bifano Dely Yazawa Luis Hernández Hospital and School of Medicine JM Vargas Universidad Central de Venezuela Caracas Venezuela Centro Medico-Docente La Trinidad Caracas Venezuela Neurology Mobile System Associates Miami FL USA Laboratory of Physiology of Behavior Universidad de Los Andes Mérida Venezuela University of Grenoble-Alpes CEA LETI Clinatec France

Neurosurgery for psychiatric disorders, notably for obsessive-compulsive disorder (OCD), was initiated in Venezuela in the decade of 1970, and consisted since that time in the classic stereotactic anterior cingulotomy. In order to know further about the physiopathology of this disorder, we performed intracerebral microdialysis in 2 patients who were operated on. The aim was to measure changes in extracellular neurotransmitters within the basal ganglia. The microdialysis probes were stereotactically placed in the right caudate nucleus and in the dorsomedial nucleus of the right thalamus. The microdialysis was done before the left cingulotomy, during the pause and after the right cingulotomy. Glutamate and gamma-aminobutyric acid (GABA) changes were similar in the caudate nucleus of both patients, whereas in the dorsomedial nucleus the changes were opposite among the 2 patients. Although this study does not bring enough data to explain such differences yet, the existence of dynamic changes in the neurochemistry of the basal ganglia during cingulotomy shows that intracerebral microdialysis can help in the understanding of the pathophysiology of OCD and eventually in the design of new surgeries with better results.

关键词： Psychiatric Neurosurgery Psychosurgery Obsessive-Compulsive Disorder Intracerebral Microdialysis

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Land cover change and carbon stores in a tropical montane cloud forest in the Sierra Madre Oriental,Mexico

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Journal of Mountain Science 2018年第10期15卷 2136-2147页

作者： edgar G.LEIJA-LOREDO Numa P.PAVóN Arturo SáNCHEZ-gonzález Rodrigo RODRIGUEZ-LAGUNA GregorioáNGELES-PéREZ Center for Biological Research Autonomous University of Hidalgo.42184 HidalgoMexico Institute oJ:Ag ricultural Sciences Academic Area of Forestry EngineeringAutonomous University of Hidalgo.43600 HidalgoMexico Postgraduate School Campus MontecilloPostgraduate in Forest Sciences.56230 Estado de MexicoMexico

Tropical montane cloud forest is one of the ecosystems with the highest biomass worldwide, representing an important carbon store. Globally its deforestation index is –1.1%, but in Mexico it is higher than –3%. Carbon estimates are scarce globally, particularly in Mexico. The objective of this study was to simulate future land-cover scenarios for the Sierra Madre Oriental in Mexico, by analyzing past forest cover changes. Another objective was to estimate stored carbon in the two study areas. These objectives involve the generation of information that could be useful inputs to anti-deforestation public policy such as the REDD+ strategy. Remote sensing was used to measure land cover change and estimate carbon stocks. Satellite images from 2015, 2000 and 1986 were used, and Dinamica EGO freeware generatedmodels of future projections. Between 1986 and 2015, 5171 ha of forest were converted to pasture. The annual deforestation rates were –1.5% for Tlanchinol and –1.3% for the San Bartolo Tutotepec sites. Distance to roads and marginalization were highly correlated with deforestation. By 2030, an estimated 3608 ha of forest in these sites will have been converted to pasture. Stored carbon was estimated at 16.35 Mg C ha-1 for the Tlanchinol site and 12.7 Mg C ha-1 for the San Bartolo site. In the Sierra Madre Oriental deforestation due to land cover change(–1.4%) is higher than levels reported worldwide. Besides having high values of stored carbon(14.5 Mg C ha-1), these forests have high biodiversity. The models' outputs show that the deforestation process will continue if action is not taken to avoid the expansion of livestock pasturing. This can be done by paying incentives for forest conservation to the owners of the land. The results suggest that REDD+ is currently the most viable strategy for reducing deforestation rates in tropical montane cloud forests in Sierra Madre Oriental.

关键词： Cloud forest Carbon stores C mitigation Climate change Dinamica EGO Forest management Remote sensing.

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Effect of Solid Wastes Composition and Confinement Time on Methane Production in a Dump

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Journal of Environmental Protection 2011年第10期2卷 1310-1316页

作者： Carlos gonzález Otoniel Buenrostro Liliana Marquez Consuelo Hernández edgar Moreno Fabián Robles 不详

In developing countries, illegal dump structures or even some landfills do not include methane collecting systems, even if local environmental laws exist. In this condition, the greenhouse gas escapes to the atmosphere uncontrolled and practical solutions to tackle this problem are not obvious. To make a solution approachable, first-hand reliable data from dump emissions are required as starting point. The methane production is not homogeneous throughout the dump, therefore to estimate its global methane emissions, various representative gas monitoring sites distributed along the dump becomes necessary. This research work presents the measures of biogas emissions collected in the final disposal site located at Morelia (Mexico), along with an evaluation of the organic fraction and confinement time participation on biogas production. Biogas emission data were taken with a portable analyzer from 49 ventilation pipes for 52 weeks. For the composition and degradability analysis of solid wastes, the required samples have been collected from 16 sites. The results show a heterogeneous composition of solid wastes: 38 separate components are present, from those, 19 belong to organic categories and 28 of total components accounts for almost 99% of the waste. The mean biogas concentration detected was: 45.5% CH4, 32.4% CO2, 3.1% O2, and 18.9% balance gas (i.e., N2, CO or H2S). The ANOVA procedure clearly corroborated the influence of composition, biodegradability and time of confinement of solid wastes on the production of methane, despite the deficiencies in the final soil layer cover in these sites.

关键词： Mexico Biodegradability Emissions Biogas Methane

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Asterohyptis stellulata: Phytochemistry and wound healing activity

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Food Bioscience 2022年第6期50卷 2067-2076页

作者： Nallely Álvarez-Santos edgar Antonio Estrella-Parra José del Carmen Benítez-Flores Rocío Serrano-Parrales Tomás Ernesto Villamar-Duque Martha Angelica Santiago-Santiago María del Rosario gonzález-Valle José Guillermo Avila-Acevedo Ana María García-Bores Phytochemistry Laboratory UBIPROSuperior Studies Faculty (FES)-IztacalaNational Autonomous University of Mexico (UNAM)Tlalnepantla de BazMexico State54090Mexico Postgraduate Biological Sciences Postgraduate Studies UnitNational Autonomous University of Mexico (UNAM)CoyoacanMexico City04510Mexico Histology Laboratory 1 UMFSuperior Studies Faculty (FES)-IztacalaNational Autonomous University of Mexico (UNAM)Tlalnepantla de BazMexico State54090Mexico Natural Products Bioactivity Laboratory UBIPROSuperior Studies Faculty (FES)-IztacalaNational Autonomous University of Mexico (UNAM)Tlalnepantla de BazMexico State54090Mexico Bioterium Superior Studies Faculty (FES)-IztacalaNational Autonomous University of Mexico (UNAM)Tlalnepantla de BazMexico State54090Mexico Plant Physiology Laboratory UBIPROFES-IztacalaUNAMTlalnepantla de BazMexico State54090Mexico

Wound healing is a fast and efficient process. However, several factors can inhibit healing, causing scars and chronic wounds. This affects patients in their physical integrity, economic and emotional stability. Many plants that are used in wound healing treatment have antioxidant/anti-inflammatory activity through ROS regulation and antibacterial activity. Asterohyptis stellulata is used for wound treatment. Nonetheless, this activity has not been evaluated and its secondary metabolites are unknown. Therefore, the objective of this study was to analyze its phytochemical composition and evaluate the healing activity of A. stellulata. For the identification of secondary metabolites, the following were carried out: phytochemical screening, quantification of total phenols, and HPLC/MS analysis. The antibacterial and antioxidant activities were also determined. Next, to evaluate the healing activity of topical application of A. stellulata, the extract was mixed with the Beeler base to form an emulsion and an irritability test was performed. The emulsion was evaluated on incisional wounds of CD1 et/et mice, with tests of tensile strength, total re-epithelialization time, wound closure speed, and histological analysis. The phytochemical analysis showed that A. stellulata has phenolic compounds, two quercetin derivatives and a glycoside rosmarinic acid as main compounds. The extract exhibited medium antibacterial and antioxidant activities. A. stellulata emulsion was non-irritating, promoted closure speed of wound (1.479 ± 0.043 mm/day), increased tensile strength (980 ± 89.44 g), and histological analysis showed it promoted mice skin regeneration, compared to the controls (Recoveron® and Beeler base). This study confirms the traditional use of the A. stellulata.

关键词： Asterohyptis stellulata Phytochemistry Skin regeneration Wound healing

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Single-cell transcriptome profiling of human HSCs during development:new insights into HSC ontogeny

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Signal Transduction and Targeted Therapy 2023年第3期8卷 877-878页

作者： edgar Grinstein Csaba Mahotka Department of Hematology Oncology and Clinical ImmunologyMedical FacultyHeinrich Heine UniversityDüsseldorfGermany Institute of Pathology Medical FacultyHeinrich Heine UniversityDüsseldorfGermany

A study recently published in Nature reported a single-cell transcriptome map of human hematopoietic stem cells(HSCs)and a gene expression signature that distinguishes nascent HSCs from non-HSCs during prenatal development.1 This transcriptome map provides an important tool for further elucidation of human HSC ontogeny and could also serve as a guide for generation of transplantable HSCs ex vivo,1 to widen the therapeutic application of HSCs.

关键词： HSCs transcriptome hematopoietic

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Efficient Graph-based Genetic Programming Representation with Multiple Outputs

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International Journal of Automation and computing 2008年第1期5卷 81-89页

作者： edgar Galvan-Lopez Department of Computer Science University of EssexColchester CO4 3SQUK

In this work, we explore and study the implication of having more than one output on a genetic programming （GP） graph-representation. This approach, called multiple interactive outputs in a single tree （MIOST）, is based on two ideas. First, we defined an approach, called interactivity within an individual （IWI）, which is based on a graph-GP representation. Second, we add to the individuals created with the IWI approach multiple outputs in their structures and as a result of this, we have MIOST. As a first step, we analyze the effects of IWI by using only mutations and analyze its implications （i.e., presence of neutrality）. Then, we continue testing the effectiveness of IWI by allowing mutations and the standard GP crossover in the evolutionary process. Finally, we tested the effectiveness of MIOST by using mutations and crossover and conducted extensive empirical results on different evolvable problems of different complexity taken from the literature. The results reported in this paper indicate that the proposed approach has a better overall performance in terms of consistency reaching feasible solutions.

关键词： Interactivity within an individual (IWI) multiple interactive outputs in a single tree (MIOST) neutrality evolvable hardware genetic programming (GP)

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Shortening filtrations

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Science China Mathematics 2012年第4期55卷 687-693页

作者： ENOCHS edgar E. Department of Mathematics University of Kentucky

Let C be a set of modules. We argue that there is an ordinal d such that if a module has a filtration by modules in g, then it has a filtration of length k by direct sums of modules in C. As an application we give ano... 详细信息

关键词： Hill classes filtrations precovering

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Is activation of GDNF/RET signaling the answer for successful treatment of Parkinson's disease?A discussion of data from the culture dish to the clinic

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Neural Regeneration Research 2022年第7期17卷 1462-1467页

作者： James A.Conway edgar R.Kramer Institute of Translational and Stratified Medicine Peninsula Medical SchoolFaculty of HealthUniversity of PlymouthDevonUK

The neurotrophic signaling of glial cell line-derived neurotrophic factor(GDNF)with its canonical receptor,the receptor tyrosine kinase RET,coupled together with the GDNF family receptor alpha 1 is important for dopaminergic neuron survival and physiology in cell culture experiments and animal *** prompted the idea to try GDNF/RET signaling as a therapeutic approach to treat Parkinson’s disease with the hallmark of dopaminergic cell death in the substantia nigra of the *** several clinical trials with GDNF in Parkinson’s disease patients,which mainly focused on optimizing the GDNF delivery technique,benefits were only seen in a few *** general,the endpoints did not show significant *** suggests that it will be helpful to learn more about the basic biology of this fascinating but complicated GDNF/RET signaling system in the dopaminergic midbrain and about recent developments in the field to facilitate its use in the *** we will refer to the latest publications and point out important open questions in the field.

关键词： α-synuclein clinical trials dopaminergic neurons glial cell line-derived neurotrophic factor GFRα1 gut-brain axis Nedd4 Parkin Parkinson’s disease RET

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