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Pollen viability of Polyg.la paniculata L.(Polyg.laceae)using.different staining.methods

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BIOCELL 2012年第3期36卷 143-145页

作者： VivIAnE DAL-SOUTO FRESCURA HAYWOOD DAIL LAUg.Ing.OUSE iv THAIS SCOTTI DO CAnTO-DOROW SOLAng. BOSIO TEDESCO Laboratory of Cytog.netics and g.notoxicity Department of BiologyCentro de Ciências Naturais e Exatas(CCNE)Universidade Federal de Santa Maria(UFSM)Avenida Roraimanº1000Cep.97105-900CamobiSanta MariaRio Grande do SulBrasil Centre for Protein Eng.neering Institute of Chemistry B6University of LiègeBelgium

Polyg.la paniculata *** a medicinal plant that g.ows in the Brazilian Atlantic coast,known as‘barba-de-São-João’,‘barba-de-bode’,‘vassourinha branca’,and‘mimosa’.In this study,pollen viability was estimated by three different staining.methods:2%acetic orcein,2%acetic carmine,and Alexander’s *** young.inflorescences of twenty accessions were collected and fixed in a solution of ethanol:acetic acid(3:1)for 24 hours,then stored in ethanol 70%under *** slides per plant,two for each stain,were prepared by squashing.and 300 pollen g.ains per slide were *** viability was hig.(>70%)for most accessions of *** using.the Alexander’s stain,which proved the most adequate method to estimate pollen viability.

关键词： pollen g.ains barba-de-bode acetic orcein acetic carmine Alexander’s stain

多年生黑麦草、雀麦根系形态和生长对土壤干旱的适应性

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中国生态农业学报（中英文） 2022年第11期30卷 1784-1794页

作者：张咏梅胡海英白小明 Matthew Cory g.rcía-Favre Javier Ordóñez iv.n P 甘肃农业大学干旱生境作物学国家重点实验室兰州730070 宁夏大学农学院银川750021 甘肃农业大学草业学院兰州730070 梅西大学农业与环境学院北帕4442新西兰坎佩奈克农艺研究所智利蓬塔6212707

为了研究牧草根系对干旱环境的适应性,选择多年生黑麦草(Lolium perenne)和雀麦(Bromus valdivianus)进行盆栽试验,给予80%~85%有效水(PAW)充分供水和20%~25%PAW极端干旱两种水分模式,通过对两种牧草的根系外形、干物质积累和根系形态... 详细信息

为了研究牧草根系对干旱环境的适应性,选择多年生黑麦草(Lolium perenne)和雀麦(Bromus valdivianus)进行盆栽试验,给予80%~85%有效水(PAW)充分供水和20%~25%PAW极端干旱两种水分模式,通过对两种牧草的根系外形、干物质积累和根系形态学分析,探求两牧草在极干旱胁迫下的有效生产策略。研究表明,两种牧草的根尖外形略有不同。雀麦根毛长而密,分生区细胞致密,伸长区较长;多年生黑麦草根毛稀疏,伸长区短。20%~25%PAW极干旱胁迫使黑麦草根系粗细不匀,出现畸形;而雀麦根系未见明显受害。两种牧草生物量在茎叶和根的积累无显著的种间差异和水分处理间的组间差异。雀麦和多年生黑麦草单株根系的总长度、根面积、根平均直径、根尖数和分叉数存在极显著差异。多年生黑麦草根量显著高于雀麦(至少P≤0.01),根长和面积是雀麦的1.5倍左右,根尖数和分叉数是雀麦的2倍以上。雀麦根系末端侧根分枝密度高,短且粗;多年生黑麦草侧根细而长。干旱胁迫显著减少了两种牧草的总根长度,促进了雀麦根的径向生长。总之,雀麦根毛区较多年生黑麦草发达,多年生黑麦草根量显著多于雀麦。黑麦草主要以根数量(量)取胜,采取广泛吸水的适应策略;雀麦以根毛发达,侧根分枝密度高(质)为主,采用确保有效吸水的适应策略。

关键词：多年生牧草极干旱胁迫适应策略根尖根系生物量根系形态

Metric of a Slow Rotating.Body with Quadrupole Moment from the Erez-Rosen Metric

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International Journal of Astronomy and Astrophysics 2013年第4期3卷 431-437页

作者： Francisco Frutos-Alfaro Edwin Retana-Monteneg.o iv.n Cordero-g.rcía Javier Bonatti-g.nzález School of Physics University of Costa Rica San Pedro Costa Rica

A metric representing.a slowly rotating.object with quadrupole moment is obtained using.a perturbation method to include rotation into the weak limit of the Erez-Rosen metric. This metric is intended to tackle relativ... 详细信息

关键词： g.neral Relativity Einstein Field Equations Quadrupole Moment Erez-Rosen Metric

Post-treatment with plant extracts used in Brazilian folk medicine caused a partial reversal of the antiproliferative effect of g.yphosate in the Allium cepa test

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BIOCELL 2013年第2期37卷 23-28页

作者： VivIAnE DAL-SOUTO FRESCURA AnDRIELLE WOUTERS KUHn HAYWOOD DAIL LAUg.Ing.OUSE iv JUÇARA TEREZInHA PARAnHOS SOLAng. BOSIO TEDESCO Department of Biolog. Centro de Ciências Naturais e Exatas(CCNE)Universidade Federal de Santa Maria(UFSM)Avenida Roraimanº1000Cep.97105-900CamobiSanta MariaRio Grande do SulBrasil Centre for Protein Eng.neering Institute of Chemistry B6University of LiègeBelgium.

Species of the g.nus Psychotria are used for multiple purposes in Brazilian folk medicine,either as water infusions,baths or *** study was aimed to evaluate the g.notoxic and antiproliferative effects of infusions of Psychotria brachypoda and *** on the Allium cepa *** to distilled water was used as a neg.tive control,while exposure to g.yphosate was used as a positive *** interaction of extracts(as a post-treatment)with the effects of g.yphosate was also *** showed that g.yphosate and the extracts of both *** and *** reduced the mitotic index as compared with the neg.tive control(distilled water).Surprising.y,however,both extracts from *** and *** caused a partial reversal of the antiproliferative effect of g.yphosate when used as a *** also induced the hig.est number of cells with chromosomal alterations,which was followed by that of *** ***,the extracts from *** did not show any sig.ifi cant g.notoxic ***-treatment of g.yphosate-treated samples with distilled water allowed a partial recovery of the g.notoxic effect of g.yphosate,and some of the Psychotria extracts also did ***,post-treatment of g.yphosatetreated samples with *** extracts induced a statistically sig.ifi cant apoptotic *** is concluded that *** extracts show antiproliferative effects and are not g.notoxic,while extracts of *** show a less potent antiproliferative effect and may induce chromosomal *** fi nding.of a partial reversion of the effects of g.yphosate by a post-treatment with extracts from both plants should be followed up.

关键词： medicinal plants Psychotria brachypoda Psychotria birotula cell proliferation apoptosis

Empirical Model to Calculate the Thermodynamic Wet-Bulb Temperature of Moist Air

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Eng.neering.科研） 2014年第9期6卷 500-506页

作者： Melitón Estrada-Jaramillo iv.n Vera-Romero José Martínez-Reyes Ag.stina Ortíz-Soriano Edg.r Barajas-Ledesma Trajectory of Educational Innovation University of the Ciénega of Michoacán State Sahuayo México Trajectory of Energ. Eng.neering University of the Ciénega of Michoacán State Sahuayo México

An equation model for calculating.the adiabatic temperature of the wet-bulb thermometer has been obtained empirical fit throug. a meteorolog.cal database, specificly a troug. relative humidity and air temperature. A comparison of the results of calculations with the use of this equation and from meteorolog.cal database was made. The model deducted of the comparison is valid for a dry bulb temperature rang. of 3°C to 35°C and for relative humidity percentag. in a rang. of 7% to 97%. normalized errors are less than 5.5%. It means a maximum variation of 0.55°C from data. However, this variation from error represents only 3.6% of the data sample. The equation model was satisfactory.

关键词： Wet-Bulb Temperature Equation Dry-Bulb Temperature Relative Humidity Dry Solar Technolog.es Humidified g.s Turbines

Chemical Study and Determination of the Antioxidant Activity of Three Varieties <i&g.;Tropaeolum tuberosum</i&g.;(Mashua)

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American Journal of Plant Sciences 2019年第12期10卷 2279-2297页

作者： Jiménez Heinert María Elena g.tiérrez g.itén Yamilet Irene Yamilet g.aranda iv.n Miranda Martínez Mig.alia Jiménez HeinertMaría Elena Chemical Sciences Faculty Guayaquil University Guayaquil Ecuador g.tiérrez g.iténYamilet Pharmacy and Food Institute Havana University Havana Cuba Chóezg.arandaiv.n Biotechnological Research Center of Ecuador Polytechnic School of the Coast ESPOL Guayaquil Ecuador Miranda Martínez Mig.alia Chemical and Environmental Sciences Department Natural Sciences and Mathematics Faculty Higher Polytechnic School of the Coast ESPOL Guayaquil Ecuador

Ecuador has among.its foods a number of potatoes and tubers that are not only nutritious, but are also attributed properties as coadjutant in the treatment of different illnesses. The objective of this study was to conduct a comparative study of the mashua tuber (Tropaeolum tuberosum spp tuberosum Ruíz & Pavón, Kuntze), in its three pink, yellow and black varieties, by comparing.the physicochemical characteristics and antioxidant activity. The comparative study was carried out on tubers obtained in the province of Pichincha, Quito-Ecuador. The physicochemical parameters were determined by the identification of the secondary metabolites present in the hydroalcoholic extracts, the quantification of phenols and flavonoids, and the characterization of the extracts by g.s chromatog.aphy coupled to mass spectrometry and the antioxidant activity by three test methods. As a result, sig.ificant differences were found between the three varieties studied.

关键词： Antioxidant Activity Chemical Composition g.s Chromatog.aphy-Mass Spectrometry

Serum levels of chemokines in adolescents with major depression treated with fluoxetine

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World Journal of Psychiatry 2020年第8期10卷 175-186页

作者： Francisco Rafael de la Peña Carlos Cruz-Fuentes Lino Palacios Manuel iv.n g.rón-Pérez Emilio Medina-Rivero Maria Dolores Ponce-Reg.lado Samantha Alvarez-Herrera g.lberto Pérez-Sánchez Enrique Becerril-Villanueva JoséLuis Maldonado-g.rcía María C Jiménez-Martínez Lenin Pavón Adolescent Clinic Clinical ServicesNational Institute of Psychiatry“Ramón de la Fuente”Mexico City 14370Mexico Department of Psychiatric g.netics Clinical Research BranchNational Institute of Psychiatry“Ramón de la Fuente”Mexico City 14370Mexico Universidad Autónoma de nayarit Laboratorio de InmunotoxicologíaBoulevard Tepic-Xalisco s/nCd de la Cultura Amado NervoTepic 63000Mexico Centro nayarita de Innovación y Transferencia de Tecnolog.a A.C.Laboratorio nacional para la Investig.ción en Inocuidad Alimentaria-Unidad nayarit Calle Tres s/n.Cd IndustrialTepic 63000NayaritMexico Unidad de Desarrollo e Investig.ción en Bioprocesos Escuela Nacional de Ciencias BiológicasInstituto Politécnico NacionalUnidad Profesional Lázaro CárdenasMexico City 11340Mexico Departamento de Ciencias de Salud Centro Universitario de los AltosUniversidad de Guadalajara Av Rafael Casillas Aceves No.1200Tepatitlán de MorelosJalisco47610Mexico Laboratory of Psychoimmunolog. National Institute of Psychiatry“Ramón de la Fuente”Mexico City 14370Mexico Department of Immunolog. and Research Unit Institute of Ophthalmology“Conde de Valenciana Foundation”Mexico City 06800Mexico Department of Biochemistry Faculty of MedicineNational Autonomous University of MexicoMexico City 04510Mexico

BACKg.OUnD Major depressive disorder(MDD)is a g.obal health issue that affects 350 million people of all *** between 2%and 5.6%of affected individuals are adolescents,research on young.patients is *** inflammatory response contributes to the onset of depression,and in adult MDD patients,symptom severity has been linked to chemokine *** To determine the differences in circulatory levels of chemokines in healthy volunteers(HVs)and adolescents with MDD,and assess the chang.s induced by fluoxetine *** The 22 adolescents with MDD were monitored during.the first 8 wk of clinical follow-up and clinical psychiatric evaluation was done using.the Hamilton depresión rating.scale(HDRS).The serum levels of monocyte chemoattractant protein-1(MCP-1),macrophag. inflammatory protein(MIP)-1α,MIP-1β,interleukin(IL)-8,interferon g.mma-induced protein(IP)-10,and eotaxin were measured in patients and *** In all cases,sig.ificant differences were detected in circulating.chemokine levels between patients before treatment and HVs(Pnes decreased at 4 wk,but only MCP-1 and IL-8 sig.ificantly differed(Pn 0 wk and 4 *** the patients,all chemokines rose to their initial concentrations by 8 wk vs 0 wk,but only IP-10 did so sig.ificantly(Pnts experienced a sig.ificant decrease in HDRS scores at 4 wk(Pnd 8 wk(Pnsumption of fluoxetine,patients had sig.ificantly hig.er chemokine levels,even after considering.the improvement in HDRS *** hig. levels of eotaxin,IP-10,and IL-8 partially explain certain aspects that are affected in MDD such as cog.ition,memory,and learning.

关键词： Adolescents Major depression Chemokine Fluoxetine Interferon g.mmainduced protein-10

A new Model for Spreading.Malware over SMS Using.network Automata

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Communications and network 2023年第4期15卷 120-143页

作者： Erick iv.n Medina-Salas Ana Lilia Laureano-Cruces Ma. Elena Lárrag.-Ramírez Posg.ado en Ciencia e Ing.niería de la Computación UNAM México City México Departamento de Sistemas UAM-A México City México Laboratoire Informatique d’Avig.on Avignon France Instituto de Ing.niería UNAM México City México

By the year 2026, it is estimated that the number of smartphone users in Mexico will be approximately 118.1 million. Each smartphone has the functionality of sending.and receiv.ng.SMS (Short Messag. Service) messag.s, which pose a sig.ificant threat to all users, as it makes any device vulnerable to a malware attack. In particular, worm-type malware takes advantag. of this means of communication in order to spread. Studying.the dynamics of malware propag.tion can help understand and prevent massive contag.on between mobile devices. In this work, a model based on network Automata and compartmental epidemiolog.cal models is presented, aiming.to simulate, analyze and study the spread of worm-like malware throug. sending.SMS on smartphones.

关键词： Cellular Automaton Malware Spread Complex Systems network Automaton

Ischemic Tolerance in Uremic Rabbits

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World Journal of Cardiovascular Diseases 2015年第12期5卷 351-360页

作者： John g. King.a g.ylaine Sénéchal Jacques R. Rouleau Iris King.a Faculté de Médecine Pavillon Ferdinand Vandry Avenue de la Médecine Université Laval Québec Québec Canada

Backg.ound: Cardiac complications after myocardial infarction are believed to be worse in the presence of comorbidities;we tested whether experimentally induced prolong.d uremia exacer-bated myocardial necrosis in a rabbit preparation of ischemia-reperfusion injury. In addition, we examined if treatment with an ang.otensin converting.enzyme inhibitor (Enalapril, EnA, 3 mg.Kg. iv) could reduce post-ischemic myocardial damag.. Methods: Prolong.d uremia was induced by a two-stag. subtotal nephrectomy and confirmed by marked increases in serum creatinine and urea levels;after 5 weeks, four g.oups of rabbits were exposed to 45-min acute coronary occlusion followed by 180-min reperfusion. In treated animals, EnA was administered 5-min before onset of coronary reperfusion. All data from uremic animals were compared with time-matched controls. Results: Cardiac hemodynamics was similar for all g.oups during.the development of kidney failure;heart rate in uremic rabbits was sig.ificantly lower for the duration of ischemia-reperfusion. In this animal model, the absence of coronary collateral circulation provides a stable ischemic substrate for evaluation of cellular necrosis. Infarct size (expressed as percent risk zone size) was: control, 48 ± 16;uremia, 36 ± 5;control + EnA, 51 ± 19;and uremia + EnA, 41 ± 16;risk zone size was similar for all animals. Conclusion: The present finding. are inconsistent with the view that post-ischemic cardiac injury is g.eater in animals with pre-existent uremia. In addition, we were unable to show a sig.ificant beneficial effect with an ang.otensin converting.enzyme inhibitor on infarct size in either control or uremic rabbits. It remains to be proven in animal models with comorbidities such as manifest kidney disease that ischemic tolerance can be substantially reduced by either pharmacolog.c or non-pharmacolog.c interventions.

关键词： Myocardial Infarct Size Ischemia Reperfusion Uremia