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Natural durability of wood of ten native species from northeastern Mexico

Forestry Studies in China 2013年第2期15卷 160-166页

作者： Artemio CARRILLO Rahim FOROUGHBACHK verónica bustamante Christian WEHENKEL Humberto GONZáLEZ Universidad Autónoma de Nuevo León (UANL) Facultad de Ciencias ForestalesCarr. Nal. No. 85 Km 145. 66700 041. Linares Nuevo León México Universidad Autónoma de Nuevo León (UANL) Facultad de Ciencias Biológicas San Nicolás de los GarzaNuevo León 66451 México Instituto de Silvicultura e Industria de la Madera Universidad Juárez del Estado de DurangoKm 5.5 Carretera Mazatlán 34120 Durango México

Thorn scrub vegetation in Mexico is distributed over 50 million ha, where native tree species are the source of forage, timber, firewood and charcoal. Research describing wood durability of species from this vegetation type has not been fully determined, nor classified according to international standards. Thus, the aim of this study was to determine and classify the natural durability of ten woody species. Their natural durability was determined according to the European Pre-Norm 807, the loss of dynamic modulus of elasticity （MOEdyo）（MPa） was determined and wood mass loss （g） after being exposed to Trametes versicolor and Coniophora puteana fungi. Wood durability was classified accord- ing to the European Norm 350-1. Highly significant differences （p 〈 0.001） were found between the durability of woody species. The more durable species with lower MOEdyn lost were Condalia hooked （57.5% ± 0.6%）, Havardia pallens （58.2% ± 0.4%） and Acacia schaffneri （58.9% ±6.3%）. Species with lower mass loss after exposed to Coniophora puteana were Ebenopsis ebano （6.3% ±1.9%）, Condalia hooked （8.6% ±2.3%） and Cordia boissieri （11.8% ±2.3%）. E. ebano （7.1% ±2.4%）, Condalia hooked （8.2% ± 2.5%） and Cordia boissieri （11.5% ± 3.1%） showed the lower mass lost after exposed to T. versicolor. According to European Norm 350-1, three woody species were classified as very durable and durable species.

关键词： native species natural durability dynamic modulus of elasticity mass loss

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Differences of Wood Elements of Prosopis laevigata from Two Areas of Northeast Mexico

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American Journal of Plant Sciences 2013年第5期4卷 56-60页

作者： Artemio Carrillo-Parra Rahim Foroughbakhch-Pournavab verónica bustamante-García Sadoth Sandoval-Torres Fortunato Garza-Ocanas Sergio Moreno-Limón Facultad de Ciencias Forestales Universidad Untónoma de Nuevo LeónLinaresMéxico Facultad de Ciencias Biológicas Uni-versidad Uutónoma de Nuevo LeónSan Nicolás de los GarzaMéxico Instituto de Silvicultura e Industria de la Madera Universi-dad Juárez del Estado de DurangoDurangoMéxico Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional Instituto Politécnico NacionalOaxaca de JuárezMéxico

Anatomical features of wood have a great variation among species as a result of genetic and environmental factors. The anatomical heartwood characteristics of Prosopis laevigata species from two areas with differences on temperature and rain precipitation on northeast Mexico were compared. Fibers length (μm), diameter of vessels (μm), and the area of the vessels (μm-2) were measured using light microscopy coupled with a digitized-image analysis system. The differences were statistically analyzed with analysis of variance. Statistical differences between fibers length (p 0.0001) and diameter of the vessels (p 0.001) from the two localities were found. The locality Linares, Nuevo León, Mexico, with higher precipitation and lower temperature, showed higher fiber length and higher diameter of the vessels than China, Nuevo León. Hard environmental conditions, where low precipitation values and high temperatures prevail, condition P. laevigata trees do reduce the risk of losing water.

关键词： Wood Anatomy Prosopis laevigata Vessels Fiber

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Astrocyte evolution and human specificity

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Neural Regeneration Research 2023年第1期18卷 131-132页

作者： Carmen Falcone verónica Martínez-Cerdeño Department of Pathology and Laboratory Medicine UC Davis School of Medicine Institute for Pediatric Regenerative Medicine and Shriners Hospitals for Children of Northern California SacramentoCAUSA

The cerebral cortex is one of the most complex structures of the mammalian central nervous system and accounts for the extraordinary cognitive abilities in primates and *** the 19th century,neur ons have been believed to be the main players in the building of the brain,yet astrocytes also play a crucial role as fundamental building blocks of the cerebral cortex complexity.

关键词： cortex specificity cerebral

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Pure and mixed plantations of Persian walnut (Juglans regia L.) for high quality timber production in Chile, South America

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Journal of Plant Ecology 2020年第1期13卷 12-19页

作者： verónica Loewe-Muñoz Mónica Balzarini Marta Ortega González Chilean Forest Institute(INFOR) Metropolitan OfficeSucre 2397ÑuñoaSantiagoChile CONICET Biometry Unit College of AgricultureUniversidad Nacional de CórdobaCiudad UniversitariaCC509CP 5000CórdobaArgentina Chilean Forest Institute(INFOR) Biobío OfficeCamino a Coronel Km 7.5San Pedro de la PazConcepciónChile

Aims Persian walnut(Juglans regia L.),an interesting forest species for the veneering industry,requires adequate management to produce valuable high-quality *** species associations and management level can improve stand productivity,the novelty of this work was to assess Persian walnut performance in different planting mixtures and in pure plantations conditioned to management *** Growth,straightness and survival measurements were taken annually for 7 years after planting pure and mixed plantations under two contrasting management *** were recorded at Age 7 in all *** each management intensity,besides the monoculture,three mixtures were tested:a mixture of only main forest species,main forest species plus one arboreal companion species,Black alder(Alnus glutinosa L.)and main species plus the shrub Russian olive(Elaeagnus angustifolia L.)as nurse species.A test of interaction between plantation type and management scenario was conducted using repeated growth *** Findings The interaction was significant,indicating the presence of different mechanisms underlying plantation effects under high and low management *** with pure plantations,Persian walnut associated with the nurse shrub exhibited 78%higher height and 53%higher diameter growth in plantations under low *** benefits(lower presence of walnut blight than in the monoculture)and better straightness were also found in the association including the shrub when the management intensity was not *** beneficial effects in the presence of Russian olive were not present under high management intensity(irrigation,fertilization,tutoring and frequent pruning).Site-specific designs for Persian walnut plantations would depend on the foreseen management intensity.

关键词： noble wood monoculture forest associations companion species Russian olive

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A Rapid Parameter of Enzyme-Treated Cellulosic Material Revealed by Reducing Sugar Release

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Journal of Renewable Materials 2024年第3期12卷 539-551页

作者： verônica Távilla Ferreira Silva Adriane Maria Ferreira Milagres Departamento de Biotecnologia Escola de Engenharia de LorenaUniversidade de São PauloLorenaSP12602-810Brazil

This study was conducted to evaluate the effectiveness of enzymes in purifying and reducing the degree of polymerization of cellulose for the production of dissolving *** goal was to determine the contributions of xylanase(X)and endoglucanase(EG)in the treatment of pulp,specifically by quantifying the formation of soluble and insoluble reducing sugars using the dinitrosalycilic acid(DNS)***,the release of soluble reducing sugars(RSSol)was enhanced after xylanase treatment,while endoglucanase(EG)treatment led to changes in insoluble reducing sugars(RSIns).The maximum synergism was observed for RSIns when a high ratio of endoglucanase to xylanase(320EG:5X/g pulp)was *** relative contribution of endoglucanase to RSins was determined to be 15.6%of the total reducing *** viscosity of pulps treated with xylanase decreased only by 7%,whereas endoglucanase treatment significantly reduced viscosity by 45%.Modifications in the particle size were observed after pulp treatment with the combination of endoglucanase and *** summary,the DNS test is a rapid and effective method for evaluating the efficiency of enzyme treatments on *** measurement of RSIns correlates with changes in pulp viscosity to different extents,providing valuable insights into the effectiveness of enzyme treatments.

关键词： Endoglucanase xylanase cellulose fiber pulp synergism

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Erratum to “On a Classical Theorem on the Diameter and Minimum Degree of a Graph”

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Acta Mathematica Sinica,English Series 2018年第12期34卷 1907-1910页

作者： vernica HERNáNDEZ Domingo PESTANA José M.RODRíGUEZ Departamento de Matemáticas Universidad Carlos Ⅲ de Madrid

The original version of the article was published in [1]. Unfortunately, the original version of this article contains a mistake： in Theorem 6.2 appears that β（n, △） = （n-△ ＋ 5）/4 but the correct statement is... 详细信息

关键词： Extremal problems on graphs diameter minimum degree maximum degree Gromov hyperbolicity hyperbolicity constant finite graphs

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Development of a microcomposite with single-walled carbon nanotubes and Nd_2O_3 for determination of paracetamol in pharmaceutical dosage by adsorptive voltammetry

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Journal of Pharmaceutical Analysis 2019年第1期9卷 62-69页

作者： verónica Arancibia Johisner Penagos-Llanos Edgar Nagles Olimpo García-Beltrán John J.Hurtado Pontificia Universidad Católica de Chile Facultad de Química Facultad de Ciencias Naturales y Matemáticas Universidad de Ibagué Departamento de Química Universidad de los Andes

This study presents for the first time a new composite of carbon paste(CP), single-walled carbon nanotubes(SWCNTs) and Nd2 O3(NdOX). This versatile composite(NdOX-SWCNT/CPE) was applied to the oxidation of paracetamol(PCM). The newly formed surface was characterized by scanning electron microscopy(SEM), electrochemical impedance spectroscopy(EIS) and cyclic voltammetry(CV). The results showed greater conductivity and a higher surface area for the composite than those of the carbon paste alone. Moreover, the anodic peak currents for PCM increased from 1.6 to 3.6 m A with CPE and NdOXSWCNT/CPE, indicating an increase of nearly 51.0% for the anodic peak current. On the other hand, the anodic peak potentials shifted from 0.67 to 0.57 V. The detection limits were 0.05 mmol/L with NdOXSWCNT/CPE and 0.50 mmol/L with SWCNT/CPE. The relative standard deviations(RSDs) were 1.5%(n=7). The accuracy and interference of the methods were evaluated with a urine chemistry control spiked with known quantities of PCM, uric acid, dopamine, ascorbic acid, caffeine, acetylsalicylic acid,tartrazine, sunset yellow, allure red, rutin, morin and metal ions. Finally, the novelty and usefulness of the composite were evaluated to quantify PCM in pharmaceutical dosage forms such as tablets, powders and syrups for children.

关键词： Paracetamol Neodymium(Ⅲ) Oxide Single-walled carbon nanotubes Pharmaceutical dosage

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Neural regeneration research model to be explored:SH-SY5Y human neuroblastoma cells

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Neural Regeneration Research 2023年第6期18卷 1265-1266页

作者： Lavynia Ferreira Hoffmann Alexandre Martins Fernanda Majolo verônica Contini Stefan Laufer Márcia Inês Goetiert Graduate Program in Biotechnology University of Vale do Taquari(Univates)LajeadoRio Grande do SulBrazil Graduate Program in Medical Sciences-PPGCM University of Vale do Taquari-UnivatesLajeado/RSBrazil Institute of Pharmacy Pharmaceutical/Medicinal Chemistry and Tübingen Center for Academic Drug Discovery-TÜCADDEberhard Karls University TübingenTübingenGermany

In neuroscience research,neuronal models are crucial tools for elucidating the molecular and cellular processes involved in the disorders of the nervous *** easily and reproducibly executable studies,in vitro models,such as the SH-SY5Y cell line culture,help us explore the pathophysiological mechanisms of neurodegenerative diseases;they are also essential for the efficient screening of drugs for treating the diseases of the nervous system(Peng et al.,2021;Strother et al.,2021).

关键词： neuroblastoma diseases

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Tools for the diagnosis of hepatitis C virus infection and hepatic fibrosis staging

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World Journal of Gastroenterology 2014年第13期20卷 3431-3442页

作者： verónica Saludes Victoria González Ramon Planas Lurdes Matas Vicente Ausina Elisa Martró Institut d’ Investigació en Ciències de la Salut Germans Trias i Pujol Hospital Universitari Germans Trias i Pujol (Universitat Autònoma de Barcelona)08916 BadalonaSpain CIBER Epidemiología y Salud Pública (CIBERESP) 08003 BarcelonaSpain Centre for Epidemiological Studies on HIV/STI in Catalonia (CEEISCAT)-ICO 08916 BadalonaSpain Liver Unit Hospital Universitari Germans Trias i Pujol08916 BadalonaSpain Ramon Planas CIBER Enfermedades Hepáticas y Digestivas (CIBEREHD)08036 BarcelonaSpain CIBER Enfermedades Respiratorias (CIBERES) 07110 BunyolaSpain

Hepatitis C virus(HCV)infection represents a major public health *** C can be cured bytherapy,but many infected individuals are unaware of their *** HCV screening,fast diagnosis and characterization,and hepatic fibrosis staging are highly relevant for controlling transmission,treating infected patients and,consequently,avoiding end-stage liver *** to HCV can be determined with high sensitivity and specificity with currently available third generation serology ***,the use of point-of-care tests can increase HCV screening ***,active HCV infection must be confirmed by direct diagnosis ***,HCV genotyping is required prior to starting any ***,high-volume clinical laboratories use different types of automated platforms,which have simplified sample processing,reduced hands-on-time,minimized contamination risks and human error and ensured full traceability of *** advances have also been made in the field of fibrosis stage assessment with the development of non-invasive methods,such as imaging techniques and serum-based ***,no single test is currently available that is able to completely replace liver *** review focuses on approved commercial tools used to diagnose HCV infection and the recommended hepatic fibrosis staging tests.

关键词： Hepatitis C virus Diagnosis Real-time polymerase chain reaction Serology Hepatitis C virus-RNA quantification Hepatitis C virus genotyping Hepatic fibrosis staging

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Initial floristic composition of rehabilitated gullies through bioengineering in the Mixteca Region, Sierra Madre del Sur, Mexico

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Journal of Mountain Science 2018年第10期15卷 2120-2135页

作者： verónica Guadalupe LIRA-CABALLERO Mario Roberto MARTíNEZ-MENEZ Angélica ROMERO-MANZANARES Edmundo GARCíA-MOYA Department of Hydrosciences Colegio de Postgraduados Department of Botany Colegio de Postgraduados

Re-vegetation plays a fundamental role for erosion control and plant recovery in lands affected by gully erosion. Bioengineered practices facilitate the gullies rehabilitation. Objectives of the research were: 1) Identify taxonomically the pioneer vegetation on each gully section; 2) Characterize vegetation distribution preferences and 3) Assess structural/functional traits to recognize erosion control key species. Bioengineering was applied in a watershed belonging to Sierra Madre del Sur, at Oaxaca, Mexico, on eight gullies, with local support and minimal investment. "La Mixteca" is a poor ecological and socio-economic region, comparable to other regions of the world. The Initial Floristic Composition(IFC) inventory is the baseline of the successional process. The transect method was used to determine the colonization of species. Cover abundance of registered species was estimated using the semi-quantitative scale of Braun-Blanquet. This procedure was repeated in five different positions(floor, hillslopes and tops), in the cross section of the gully. Throughcorrespondence analysis and clustering, the distribution of species was analyzed. Adequate responses were obtained in soil retention(quantity) and plant cover(existence and diversity); as measurable indicators of the bioengeneering works efficiency. Occupation of soil by native species from the Tropical Deciduous Forest was favored using live barriers. We detected species guilds with spatial distribution preferences in the gullies cross section. Plant cover characterization includes: native colonizer species, herbaceous, shrubby and trees of the forest community bordering the gully area, with cover abundance and structural/functional traits, useful to protect degraded areas. This spatial occupation process of plants responds to a secondary succession in gullies, where the proposed IFC model is correctly represented through bioengineering. Natural establishment of plants was successful by traits of species such

关键词： Semi-arid environment Mexico Gully erosion Plant colonization Multivariate analysis Braun-Blanquet method

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