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Longest Hamiltonian in N<sub>odd-</sub>gon

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Open Journal of Discrete Mathematics 2013年第2期3卷 75-82页

作者： blanca I. Niel Depto de Matemática Universidad Nacional del Sur Bahía Blanca Argentina

We single out the polygonal paths of nodd -1 order that solve each of the different longest non-cyclic Euclidean Hamiltonian path problems in networks by an arithmetic algorithm. As by product, the procedure determine... 详细信息

关键词： Hamiltonian Path Extremal Problems Euclidean geometric Problem Farthest Neighbor Tours Traveling Salesman Problem geometry of Odd Regular Polygons

Conifer establishment after the eruption of the Paricutin volcano in central Mexico

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Forest Ecosystems 2022年第1期9卷 71-82页

作者： Jesús Eduardo Sáenz-Ceja blanca Lizeth Sáenz-Ceja J.Trinidad Sáenz-Reyes Diego Rafael Pérez-Salicrup Instituto de Investigaciones en Ecosistemas y Sustentabilidad Universidad Nacional Autéonoma de MéxicoAntigua Carretera a Patzcuaro 8701 Col.Ex hacienda San Joséde la Huerta58190MoreliaMexico Escuela Nacional de Estudios Superiores Unidad Morelia Universidad Nacional Autónoma de MéxicoAntigua Carretera a Patzcuaro 8701 Col.Ex hacienda San Joséde la Huerta58190MoreliaMexico Instituto Nacional de Investigaciones Forestales Agrícolas y PecuariasCampo Experimental UruapanAv.Latinoamericana 1101Col.Revolución60500UruapanMexico

Background:Volcanic eruptions have large effects on forest ecosystems and create new substrates,triggering primary succession *** Paricutín volcano,born in central-western Mexico,erupted between 1943 and *** the cessation of the eruptive activity,plant colonization began on the lava flows and tephra deposits,including the conifer species that dominate the surrounding mature *** study aims to reconstruct the history of the establishment of conifer trees on the substrates created by the Paricutín ***:16 sampling plots were established along three transects with northern,southern,and south-western aspects,located every 250 m from the preserved forest to the volcanic *** cores from 400 conifer trees were extracted and their age was determined by cross-dating annual tree *** order of the species colonization and the tree establishment,abundance,and dominance patterns were ***,the influence of the distance from the mature forests and the inter-annual climatic conditions on the temporal tree establishment pattern was ***:Eight pine and one fir species have been established since 1970,only 18 years after the end of the eruptive ***,tree establishment increased by 12.9%annually after 1995,with the youngest tree in our sample getting established in *** did not find a well-defined temporal and spatial pattern of species arrival,which suggests that colonization occurred randomly,although the four pine species that were established early became the most abundant and *** establishment was not influenced by the distance from the mature forest,and wet inter-annual conditions did not enhance pulses of tree recruitment,exhibiting a continuous tree establishment ***:Conifer species have shown a great capacity for colonizing volcanic substrates created by the Paricutín eruption,which suggests that tropical montane conifers can regenerate rapidly under high-magni

关键词： Age structure Dendrochronology Lava flow Primary succession Tropical montane forest

Reading and Writing Practices： Case Studies at the Sergio Arboleda University of Colombia

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Sino-US English Teaching 2012年第5期9卷 1113-1123页

作者： blanca Yaneth gonzeilez Violeta Vega Pontificia Universidad Javeriana Bogota Colombia Sergio Arboleda University Bogota Colombia

This research project analyzes the reading and writing practices used in five first and second year undergraduate courses of different disciplines at a Colombian university. During one semester, we conducted polls, class observations, and interviews with teachers. The data collected contain information about the strategies that teachers use to guide, clarify, and evaluate the readings they assigned. It also informs about the ways in which teachers classify texts and participate in the process of composing, editing, and evaluating the students＇ writing. Finally, the data inform about the role that teachers assign to the practices of reading and writing in their courses. The results of the study prove that there is a misconception based on the idea that there is a unique way of understanding and practicing reading and writing in the academia, and that there is a set of unique strategies that are transferable to any discipline or field of study. The cases analyzed in this study suggest that it would be much more effective to incorporate intensive reading and writing strategies in disciplinary courses, than to concentrate on first year writing courses.

关键词： academic writing and reading practices allocation supervision academic dialogue evaluation

IL-1β, TNF-α and Sambucus nigra Reactive Serum Proteins as Biomarkers of Mild Cognitive Impairment and Alzheimer Disease Progression

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Advances in Alzheimer's Disease 2015年第4期4卷 99-109页

作者： Luis Manuel Castillo Enrique moreno Yaneth Rodriguez-Agudelo MireyaChavez-Oliveros Zoila Trujillo blanca Espinosa Emma Rodriguez-Maldonado Luis Felipe Montano Jorge guevara Departamento de Bioquimica Facultad de MedicinaUniversidad Nacional Autonoma de MexicoMexico CityMexico Departamento de Neuropsicologia Instituto Nacional de Neurologia y NeurocirugiaMexico CityMexico geriatra Instituto Nacional de Neurologia y Neurocirugia Mexico CityMexico Laboratorio de Bioquimica Instituto Nacional de Enfermedades RespiratoriasMexico CityMexico Departamento de Fisiología Instituto Nacional de CardiologiaMexico CityMexico Departamento de Biologia Celular y Tisular Facultad de MedicinaUniversidad Nacional Autonoma de MexicoMexico CityMexico

Amyloid-β (Aβ) can induce a chronic inflammatory immune response that is associated, amongst many others, to abnormal glycosylation, inducible nitric oxide synthase (iNOS) and nitric oxide (NO). The relation between development of Mild Cognitive Impairment (MCI) and Alzheimer’s disease progression and these serum markers has not been evaluated. Serum levels of iNOs, NO, TNF-α, IL-1β, IL-6, IL-8, IL-10, and IL-12 are determined with commercially available kits. Sialylation of albumin-free serum patterns is determined by Western blot analysis with Sambucus nigra (specific for sialic acid attached to terminal galactose in α2,6 linkage) lectin. Apolipoprotein E (ApoE) haplotype is determined by Western blot using specific anti-ApoE 2, 3 or 4 antibodies. A mini-mental state examination (MMSE) test is also performed in the 10 MCI patients, 19 Alzheimer’s disease (AD) patients and 46 healthy age-matched controls evaluated. The results show an increase of iNOS in MCI and AD but significantly higher NO concentrations are only found in MCI patients. TNF-α and IL-1β concentrations are the only significantly increased cytokines in MCI patients;no differences between control and MCI or AD patients are found in regard to the other cytokines. An abnormal MMSE test result only correlates with a decrease in serum NO concentration in MCI patients. The terminal sialic acid linkage pattern of serum proteins also shows highly significant differences between MCI and AD patient. ApoE3/4 or 4/4 haplotypes are characteristic of MCI and AD patients. Our results imply that increased serum TNF-α, IL-1β, iNOS, NO and alterations of serum proteins glycosylation patterns in adult individuals with an abnormal MMSE test may serve as an early biomarker of MCI and AD development.

关键词： Alzheimer Disease Mild Cognitive Impairment Nitric Oxide Inflammatory Cytokines glycosylation Apolipoprotein E4

Synthesis and Characterization of green Potassium Nanoparticles from Sideroxylon Capiri and Evaluation of Their Potential Antimicrobial

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Journal of Renewable Materials 2021年第10期9卷 1699-1706页

作者： Judith Constantino-Alcazar Miguel Abud-Archila Benjamín Valdez-Salas Federico gutierrez-Miceli Carlos Ceceña-Duran blanca López-Valenzuela Daniel gonzalez-Mendoza Tecnológico Nacional de México Instituto Tecnológico de Tuxtla GutiérrezTuxtlaGutiérrezC.P.03940México Instituto de Ciencias Agrícolas de la Universidad Autónoma de Baja California(ICA-UABC) Ejido Nuevo LeónC.P.21705México Instituto de Ingeniería de la Universidad Autónoma de Baja California Mexicali21100México

In the present study,the green synthesis of potassium nanoparticles(K-NPs)was assessed using aqueous extract of Sideroxylon *** potassium nanoparticles were analyzed by UV-visible spectroscopic techniques,X-ray spectrometers of energy dispersive(SEM-EDS)and dynamic light *** results showed high values at 3.5 keV confirming the formation of potassium nanoparticles and the SEM analysis showed an agglomerated particles size between 360 to 200 nm with a spherical *** K-NPs showed an effective antibacterial activity against the test organisms mainly with Bacillus cereus,Enterobacter aerogenes,Fusarium solani and Botrytis *** further studies about nanotoxicity of K-NPs are needed to confirm their potential in the control of the pathogen microorganisms under field conditions.

关键词： Antimicrobial effect green synthesis Sideroxylon capiri biocontrol

Upper Blepharoplasty Scar and Patient Satisfaction Evaluation in a Plastic Surgery Center in Mexico

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Journal of Biosciences and Medicines 2020年第6期8卷 77-88页

作者： Victor Hugo Avalos gómez Jaime Aron garcía Espinoza José Carlos Martínez López Carlos Illich Navarro Delgadillo blanca Yadira Arámbula Sánchez Alejandro Costa Dulche Cuahutemoc Márquez Espriella Esteban Israel Campos Serna Division of Plastic and Reconstructive Surgery Hospital Central Sur de Alta Especialidad de Petróleos Mexicanos Mexico City Mexico

Background: Eyes are one of the most important facial features, their appearance being associated with state of mind, age and beauty. Therefore, upper blepharoplasty is one of the most common procedures performed in p... 详细信息

g>Background: g>Eyes are one of the most important facial features, their appearance being associated with state of mind, age and beauty. Therefore, upper blepharoplasty is one of the most common procedures performed in plastic surgery. Standardized tools allow for measurement of outcomes through patient satisfaction and surgeon experience. g>Objectives: g>Our objective was to measure the satisfaction index and scar quality of patients who underwent upper blepharoplasty using the Patient-reported Outcome Measure Questionnaire (PROM-Q) and Patient and Observer Scar Assessment Scale (POSAS). g>Methods: g>A retrospective review of patients that underwent upper blepharoplasty in our institution was performed. We included those with a preoperative anthropometric analysis, standardized incision markings (developed in our center), same operative technique and a 3-month postoperative evaluation with PROM-Q and POSAS. The sample for this study consists of 67 patients, all of them operated between January 1 2019 and June 30 2019 at the Department of Plastic Surgery, South Central High Specialty Hospital, Pemex, Mexico City, Mexico. g>Results: g>A total of 67 patients were included, 73% female and 27% male. The most frequent indication for surgery was functional visual symptoms. The index of PROM-Q at 3 months demonstrated an increased satisfaction above 90%, and the evaluation with POSAS reported an almost imperceptible scar. g>Conclusion:g> Evaluating outcomes with objective tools provides data useful to improve the surgical protocols of patients subjecting to aesthetic procedures.

关键词： Upper Blepharoplasty Satisfaction Index PROM-Q Quality of Life Scar

磺酸多相催化剂用于二甲基亚砜中C_6-单糖脱水制5-羟甲基糠醛(英)

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催化学报 2014年第5期35卷 644-655页

作者： gabriel Morales Juan A.Melero Marta Paniagua Jose Iglesias blanca Hernandez Maria Sanz Department of Chemical and Environmental Technology Universidad Rey Juan Carlos. C/Tulipan s/n. Mostoles. E28933Madrid Spain Department of Chemical and Energy Technology Universidad Rey Juan Carlos. C/Tulipan s/n. Mostoles. E28933 Madrid Spain

Sulfonic acid-functionalized heterogeneous catalysts have been evaluated in the catalytic dehydration of C(,monosaccharides into 5-hydroxymethylfurfural(HMF) using dimethyl sulfoxide(DMSO)as *** commercial resin Amberlyst-70 was the most active catalyst,which was ascribed to its higher concentration of sulfonic acid sites as compared with the other catalysts,and it gave 93 mol%yield of HMF from fructose in 1 *** glucose as the starting material,which is a much more difficult reaction,the reaction conditions(time,temperature,and catalyst loading) were optimized for Amberlyst-70 by a response surface methodology,which gave a maximum HMF yield of 33 mol%at 147 °C with 23 wt%catalyst loading based on glucose and 24 h reaction *** promotes the dehydration of glucose into anhydroglucose,which acts as a reservoir of the substrate to facilitate the production of HMF by reducing side *** reuse without a regeneration treatment showed a gradual but not very significant decay in catalytic activity.

关键词：非均相催化剂羟甲基糠醛二甲基亚砜磺酸脱水单糖响应面分析法 DMSO

Effectiveness of dry needling on reducing pain intensity in patients with myofascial pain syndrome： a Meta-analysis

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Journal of Traditional Chinese Medicine 2016年第1期36卷 1-13页

作者： Juan Rodriguez-Mansilla blanca gonzalez-Sanchez Alvaro De Toro garcia Enrique Valera-Donoso Elisa Maria garrido-Ardila Maria Jimenez-Palomares Maria Victoria gonzalez Lopez-Arza Department of Medicine and Surgery University of Extremadura School of MedicineAdolor Research Group of the University of ExtremaduraBadajoz 06006Spain IMC Physiotherapy clinic Department of Physiotherapy.Caceres 10001Spain Physical and Rehabilitation Medicine Department Complutense University School of MedicineMadrid 28040Spain

OBJECTIVE: To summarize the literature about the effectiveness of dry needling(DN) on relieving pain and increasing range of motion(ROM) in individuals with myofascial pain syndrome(MPS).METHODS: Papers published from January 2000 to January 2013 were identified through an electronic search in the databases MEDLINE, Dialnet, Cochrane Library Plus, Physiotherapy Evidence Database(PEDro) and Spanish Superior Council of Scientific Research(CSIC). The studies included were randomized controlled trials written in English and/or Spanish about the effectiveness of DN on pain and ROM in individuals with ***: Out of 19 clinical trials that were potentially relevant, a total of 10 were included in the Meta-analysis. Regarding pain intensity reduction when measured before and immediately after the intervention, DN achieved improvement compared with the placebo treatment [d =-0.49; 95% CI(-3.21, 0.42)] and with the control group [d =-9.13;95% CI(- 14.70,- 3.56)]. However, other treatments achieved better results on the same variable compared with DN, considering the measurements for pre-treatment and immediately after [d = 2.54;95% CI(-0.40, 5.48)], as well as the pre-treatment and after 3-4 weeks [d = 4.23; 95% CI(0.78, 7.68)].DN showed a significantly increased ROM when measured before the intervention and immediately after, in comparison with the placebo [d = 2.00;95% CI(1.60, 2.41)]. However, other treatments achieved a significant better result regarding ROM when it was measured before the intervention and immediately after, as compared with DN [d =-1.42;95% CI(-1.84,-0.99)].CONCLUSION: DN was less effective on decreasing pain comparing to the placebo group. Other treatments were more effective than DN on reducing pain after 3-4 weeks. However, on increasing ROM,DN was more effective comparing to that of placebo group, but less than other treatments.

关键词： Dry needling Myofascial pain syndromes Rehabilitation Meta-analysis

新冠疫情下委内瑞拉保障大学教学活动的教育政策 ——以委内瑞拉中央大学为例

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新冠疫情下委内瑞拉保障大学教学活动的教育政策 ...

作者： Nazarelys blanca Arcila 华东师范大学

学位级别：硕士

新冠肺炎给世界各地的教育系统带来了危机,威胁着人们的受教育权和学习过程的连续性。因此,各国出台了基于网络技术的政策来保证教育。但是,许多国家的技术基础设施并不能够胜任疫情期间在线教育的要求。委内瑞拉制定了“居家上大学（Un... 详细信息

新冠肺炎给世界各地的教育系统带来了危机,威胁着人们的受教育权和学习过程的连续性。因此,各国出台了基于网络技术的政策来保证教育。但是,许多国家的技术基础设施并不能够胜任疫情期间在线教育的要求。委内瑞拉制定了“居家上大学（University at Home,Universidad en Casa）政策,以保证大学部门在新冠大流行期间的运行。本研究以委内瑞拉中央大学为例,探究疫情期间委内瑞拉为保证大学的正常教学活动而实施的“居家上大学”政策,研究目的在于明确委内瑞拉于疫情下的教育政策对保障大学正常教学的作用,借助混沌和复杂理论解释战略性政策帮助优化远程教学的实践效果,提出保证教育权的教育政策建议。研究对委内瑞拉中央大学的管理层（包括3名院长,1名学校主任,1名教职学术协调员,1名学校学术协调员和1名平台专家）进行了半结构性访谈,并采用内容分析方法对这些质性资料进行了归纳分析。研究结果表明,由于线上教育的条件,国家宪法要求的受教育权难以保障,而且政策的制定未征询大学管理者意见。混沌和复杂性理论原则也没有得到合理应用,因为该理论要求适应性、弹性和计划性,但疫情下委内瑞拉的事实并非如此。大学依靠自己的资源来完成教学任务,不乏有一些好的教学实践,诸如学习、信息和协作等。源于线上教学的特性,教学活动也需要更多弹性和分析。总结而言,此项研究考察了疫情期间委内瑞拉如何采取教育保障政策,以保证大学的正常教学,并提供了相关建议。委内瑞拉在疫情期间制定了“居家上大学”的教育保障政策,但政策的实施未取得理想效果。

关键词：居家上大学国家政策学习过程受教育权