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Geomaterials 2019年第1期9卷 17-28页

作者： Fatou Samb Fortunée A. Fanoukoe ariel Joselyne Nzontheu Keno moussa Diop Laboratoire de mécanique et de modélisation UFR Sciences de l’Ingénieur Université de Thiès Thiès Sénégal

The vibrations induced by railway traffic can affect the stability of structures, buildings and buried structures. To evaluate this impact, this study was carried out considering the case of the Regional Express Train which will connect Dakar to Blaise Diagne International Airport. For that, the modeling software Plaxis dynamic [1], able to generate harmonic loads, is used and permitted to have a dynamic analysis and comparison between static and dynamic load for one passage of the train for 2.56 s. In the modeling, two behavior laws were used those of mohr Coulomb for the layers of soil, embankments and the form layer, and then the linear elastic model for the rest of the elements. The results obtained showed extreme vertical displacements 40.18 mm for the building and when no load is applied on the track, there was 40.24 mm for a static load, and 40.17 mm for a dynamic load. Also, it was observed for the track a displacement of 33.73 mm for a static load and 19.83 mm for a dynamic load. However, further studies are necessary to take into account the permanent deformation after an accurate cycle of train passage in order to better evaluate the railway traffic impact.

关键词： FEm modelling Impact Vibrations Railway Traffic Harmonic Loads

Scalable batch fabrication of ultrathin flexible neural probes using a bioresorbable silk layer

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microsystems & Nanoengineering 2022年第1期8卷 305-315页

作者： Clement Cointe Adrian Laborde Lionel G.Nowak dina N.Arvanitis David Bourrier Christian Bergaud Ali maziz LAAS-CNRS 7 Avenue du Colonel RocheF-31400 ToulouseFrance CerCo UniversitéToulouse 3CNRSPavillon BaudotCHU PurpanBP 2520231052 ToulouseFrance UmR Institut National de la Santéet de la Recherche médicale 1048 Institut des Maladies Métaboliques et CardiovasculairesToulouseFrance

Flexible intracerebral probes for neural recording and electrical stimulation have been the focus of many research works to achieve better compliance with the surrounding tissue while minimizing *** have been explored to find the best way to insert flexible probes into the brain while maintaining their flexibility once ***,we present a novel and versatile scalable batch fabrication approach to deliver ultrathin and flexible probes consisting of a silk-parylene *** biodegradable silk layer,whose degradation time is programmable,provides a temporary and programmable stiffener to allow the insertion of ultrathin parylene-based flexible *** innovative and robust batch fabrication technology allows complete freedom over probe design in terms of materials,size,shape,and *** demonstrate successful ex vivo insertion of the probe with acute high-fidelity recordings of epileptic seizures in field potentials as well as single-unit action potentials in mouse brain *** novel technological solution for implanting ultraflexible devices in the brain while minimizing rejection risks shows high potential for use in both brain research and clinical therapies.

关键词： batch recording insertion

Pesticide-Handling Practices in Agriculture in El Salvador: An Example from 42 Patient Farmers with Chronic Kidney Disease in the Bajo Lempa Region

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Occupational Diseases and Environmental medicine 2014年第3期2卷 56-70页

作者： Roberto mejía Edgar Quinteros Alejandro López Alexandre Ribó Humberto Cedillos Carlos m. Orantes Eliette Valladares dina L. López Department of Geological Sciences Ohio University Athens OH USA National Institute of Health Ministry of Health of El Salvador San Salvador El Salvador University of El Salvador San Salvador El Salvador

Introduction: The occupational toxic risks from agricultural activities in El Salvador affect human and environmental health. The objective of this paper is to describe the management of pesticide by farmers confirmed with a chronic kidney disease of uncertain etiology (CKDu) not associated to diabetes mellitus or hypertension. methods: The study involved 42 male patients older than 18 years old with confirmed CKDu that have participated in different stages of pesticides management. This is a cross-sectional study;it was conducted from January to June 2011, in three communities of Bajo Lempa region, El Salvador. An interview was especially designed to investigate which pesticides were used and the farmer practices at different stages of pesticide use. Statistical descriptive analysis was carried out for the several studied variables. Results: All interviewed people had a direct relationship with agricultural activities. The majority of patients had poor education, 19% were illiterate and 55% only have primary education. most farmers with CKDu had been exposed more than 10 years to hazardous pesticides. The most used pesticide was Hedonal/2, 4 D (100%). 95% interviewed patients mixed different pesticides and 63% dumped empty pesticide containers in the fields. Interviewees did not use appropriate personal protective equipment (100%). Conclusions: There is high use of hazardous pesticides by patients and some of these are banned and some are legal in El Salvador, but prohibited by other countries. Interviewed CKDu patients had high exposure to toxic pesticides due to the misuse in almost all stages. There is inadequate legislation and a poor law enforcement to prevent the misuse of pesticides in El Salvador.

关键词： Bajo Lempa Pesticides El Salvador CKDu Chronic Kidney Disease of Uncertain Etiology

Allometric equations for estimating leaf area index(LAI) of two important tropical species(Tectona grandis and Dendrocalamus strictus)

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Journal of Forestry Research 2010年第2期21卷 197-200,I0006页

作者： Dhaval Vyas Nirav mehta J.dina-karan N.S.R.Krishnayya Ecology Laboratory Deprtment of BotanyFaculty of ScienceM.S.University of Baroda

Leaf area index（LAI） of Teak（Tectona grandis） and Bamboo（Dendrocalamus strictus） grown in Shoolpaneshwar Wildlife Sanctuary of Narmada District,Gujarat,India was obtained by destructive sampling,photo-grid method and by litter trap *** allometric equation（between leaf area by litter trap method and canopy spread area） was developed for the determination of *** show that LAI value calculated by the developed allometric equation was similar to that estimated by destructive sampling and photo-grid method,with Root mean Square Error（RmSE） of 0.90 and 1.15 for Teak,and 0.38 and 0.46 for Bamboo,*** was a perfect match in both the LAI values（estimated and calculated）,indicating the accuracy of the developed equations for both the *** conclusion,canopy spread is a better and sensitive parameter to estimate leaf area of *** developed equations can be used for estimating LAI of Teak and Bamboo in tropics.

关键词： bamboo canopy spread area leaf area index specific leaf area teak tropical forest

树轮记录的自公元1200年以来强火山喷发事件与高亚洲南部河流源区气候水文变化的关联

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第四纪研究 2021年第2期41卷 323-333页

作者：陈友平陈峰张合理胡茂王世杰 Hadad martín ariel Roig Junent Fidel ALEJANDRO 云南大学国际河流与生态安全研究院国际河流与跨境生态安全重点实验室云南昆明650504 中国气象局乌鲁木齐沙漠气象研究所树木年轮理化研究重点开放实验室/新疆树木年轮生态实验室新疆乌鲁木齐830002 Laboratorio de Dendrocronología e Historia Ambiental IANIGLACCT CONICETMendozaP.O.Box330MendozaArgentina

强火山喷发作为气候变化重要的外强迫因素,其所造成的气候环境效应一直是气候变化研究热点,而其对于流域水循环影响较少受关注。本文利用采自高亚洲南部河流源区麦吊云杉(Picea brachytyla)树轮样本,研制出一个长达885 a的树木年轮标准... 详细信息

强火山喷发作为气候变化重要的外强迫因素,其所造成的气候环境效应一直是气候变化研究热点,而其对于流域水循环影响较少受关注。本文利用采自高亚洲南部河流源区麦吊云杉(Picea brachytyla)树轮样本,研制出一个长达885 a的树木年轮标准宽度年表。基于树轮气候响应分析结果,利用线性回归模型重建研究区自公元1200年上年11月至当年2月平均最低气温变化,重建方程方差解释量47.1%。该气温重建序列显示,研究区自公元1200年经历了8个冷期和9个暖期,包含有10个极冷年和23个极暖年。同时,该气温重建序列验证了自公元1200年来27次强火山喷发(VEI≥5)对于青藏高原东南部河流源区气候的影响,包括1257年Samalas和1815年Tambora等强火山喷发事件。该气温重建序列与相关河流径流数据对比结果表明强火山喷发在引起高亚洲南部河流源区气温出现明显下降的同时,也可能会进一步导致水循环减缓,使得高亚洲南部河流径流量出现减少。

关键词：树木年轮气温重建火山喷发水文效应青藏高原

A new can didate vaccine for human brucellosis based on influenza viral vectors:a preliminary investigation for the development of an immunization schedule in a guinea pig model

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Infectious Diseases of Poverty 2021年第1期10卷 56-65页

作者： dina Bugybayeva Zhailaubay Kydyrbayev Nadezhda Zinina Nurika Assanzhanova Bolat Yespembetov Yerken Kozhamkulov Kunsulu Zakarya Sholpan Ryskeldinova Kaissar Tabynov Research Institute for Biological Safety Problems 15 MomushulyGvardeyskiy 080409Kazakhstan Kazakh National Agrarian University 8 Abay AvenueAlmaty 050010Kazakhstan Research Institute of Cardiology and Internal medicine 120 Aiteke biAlmaty 050000Kazakhstan.

Background:A new candidate vector vaccine against human brucellosis based on recombinant influenza viral vectors(rIVV)subtypes H5N1 expressing Brucella outer membrane protein(Omp)16,L7/L12,Omp19or Cu-Zn SOD proteins has been *** paper presents the results of the study of protection of the vaccine using on guinea pigs,including various options of administering,dose and *** data of the novel vaccine candidate will contribute to its further movement into the preclinical stage ***:General states of guinea pigs was assessed based on behavior and dynamics of a guinea pig weight-gain *** effectiveness of the new anti-brucellosis vector vaccine was determined by studying its protective effect after conjunctival,intranasal and sublingual administration in doses 10^(5) EID50,10^(6) EID_(50) and 10^(7) EID_(50) during prime and boost vaccinations of animals,followed by challenge with a virulent strain of *** 16 m *** sake of comparison,the commercial ft melitensis Rev.1 vaccine was used as a *** protective properties of vaccines were assessed by quantitation of Brucella colonization in organs and tissues of infected animals and compared to the control ***:It was observed a gradual increase in body weight of guinea pigs after prime and booster immunization with the vacci ne using conjunctival,intra nasal and subli ngual routes of administration,as well as after using various doses of *** most optimal way of using the vaccine has been established:double intranasal immunization of guinea pigs at a dose of 10^(6) EID50, which provides 80%protection of guinea pigs from *** 16 m infection(Pmparable to the results of the effectiv en ess of the commercial *** Rev.1 vacci ***:We developed effective human vaccine candidate against brucellosis and developed its immunization protocol in guinea pig *** believe that because of these studies,the proposed

关键词： Human brucellosis Influenza viral vectors Vaccine candidate Protection Guinea pigs Immunization route Vaccination dose

The Effect of the Light Intensity and Light Distances of LED and QTH Curing Devices on the Hardness of Two Light-Cured Nano-Resin Composites

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materials Sciences and Applications 2015年第11期6卷 1071-1083页

作者： Pnina Segal Diva Lugassy Eitan mijiritsky michal Dekel ariel Ben-Amar Zeev Ormianer Shlomo matalon Department of Oral Rehabilitation School of Dental Medicine Tel Aviv University Tel-Aviv Israel

Background: Effective polymerization of the composite resin is essential to obtain long term clinical success and has a great importance obtaining improved mechanical properties. The purpose of this study was to measure the effect of the light intensity of LED and QTH curing devices in relation to the light distances, on the hardness (KHN) of two light cure nano-resin composite. material and methods: The top and bottom surfaces of the two nanofill composite specimens were evaluated. Two LED and two QTH light curing devices were used at nine different distances. Light intensity was measured with two radiometers placed at these same distances from the curing tip. 360 pvc dies were prepared with circular cavity 3 mm in diameter and 2 mm thick. The tested materials were placed in each cavity. The different light curing distances were standardized by adding pvc spacers dies at different height matching the different distances. Top and bottom surface microhardness were evaluated with a micro Hardness Tester in knoop hardness numbers (Kg/mm2). Data were statistically analyzed using: Three-way ANOVA, Tukey and Pearsons test. Results: It was revealed that there was a statistically significant difference in microhardness between the composites (p m composite resin, the light intensity and the microhardness values at the top and bottom surface decrease. LED light curing devices produced a greater microhardness results at the bottom surface of the specimens. The Filtek Ultimate nanocomposite (3 m) showed highest microhardness values on the top and bottom surfaces, polymerized with all four curing devices and all nine distances compared to Empress Direct nano composite (Ivoclar vivadent). Clinical significant: Even with high power LED curing light, the distance between the tip of the light source and the restoration surface should

关键词： Light-Curing Devices Nano-Filled Resin Composites microhardness

An Approach for micropropagation of Blueberry (Vaccinium corymbosumL.) Plants mediated by Temporary Immersion Bioreactors (TIBs)

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American Journal of Plant Sciences 2013年第5期4卷 1022-1028页

作者： ariel D. Arencibia Carolina Vergara Karla Quiroz Basilio Carrasco Carmen Bravo Rolando Garcia-Gonzales Faculty of Agricultural and Forestry Sciences Catholic University of Maule Talca Chile.

A new procedure for blueberry (Vaccinium corymbosum L.) micropropagation in programmed Temporary Immersion Bioreactors (TIBs based on two separate bottles) was developed for the commercial genotypes Biloxi, Sharp Blue and Brillita. Plant cultures were developed in a controlled environment with 0.4 mPa CO2 enrichment, sucrose-reduced medium, and light intensity of 60 mm m-2·s-1. Principal component analysis showed that component 1 (C1) grouped 64.08% of the total variability, while the first two components accounted for 86.97%. Representation of the principal components demonstrated three clusters corresponding with the blueberry genotypes, and within each cluster plants micropropagated in agar-base medium grouped separately from those plants multiplied in TIBs. Both plant number and total internodes traits (related to the productive efficiency) were demonstrated superior in blueberries propagated in TIBs. Additionally, when transferred to greenhouse conditions, blueberries propagated in TIBs showed higher adaptability and growing rates than those cultured by the conventional approach, altogether evidencing the occurrence of a photomixotrophic stage in the vitroplantlets cultured in TIBs.

关键词： Temporary Immersion Bioreactors Vaccinium corymbosum L. Photomixotrophic Blueberry micropropagation

Phenotypic and molecular Characterization of Phaseolus vulgarisPlants from Non-Cryopreserved and Cryopre-served Seeds

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American Journal of Plant Sciences 2013年第4期4卷 844-849页

作者： Inaudis Cejas Roberto méndez ariel Villalobos Felix Palau Carlos Aragón Florent Engelmann Domenico Carputo Riccardo Aversano marcos Edel martínez José Carlos Lorenzo Department of Soil Plant Environmental and Animal Production Sciences University of Naples Federico II Naples Italy Faculty of Agronomy Universidad de Ciego de ávila Ciego de ávila Cuba Institut de Recherche pour le Développement UMR Diversité Adaptation et Developpement des Plantes Montpellier France Laboratory for Plant Breeding Centro de Bioplantas Universidad de Ciego de ávila Ciego de ávila Cuba

The objective of this work was to evaluate if cryostorage of Phaseolus vulgaris L. seeds induced variations in regenerated plants at the phenotypic and molecular levels. A series of agricultural traits was measured on plants grown from control, non-cryopreserved and cryopreserved seeds, and the genetic stability of plants of the second generation was analysed at selected microsatellite loci. The phenotype of the second generation plants was evaluated as well. No statistically significant phenotypic differences were observed for the parameters measured, neither in the first nor in the second generations. Averaging both treatments, about 76% of the seeds had germinated 10 days after sowing. At harvest we recorded plants with about 73 cm in height, 13 stem internodes, 25 fruits, 103 grains and 4 grains per fruit. One hundred seeds weighted about 26 g. The genetic analyses performed on the second generation plants using six nuclear Simple Sequences Repeats (SSR) markers revealed no changes in microsatellite length between control and cryopreserved samples, implying that there was no effect of seed liquid nitrogen exposure on genome integrity. The phenotypic and molecular results reported here confirm that cryostorage is an efficient and reliable technique to conserve P. vulgaris seeds and regenerate true-to-type plants.

关键词： Common Bean Cryostorage Genotype Variation Phenotype Variation

Comprehensive Analysis of CuIn1-xGaxSe2Based Solar Cells with Zn1-ymgyO Buffer Layer

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materials Sciences and Applications 2020年第12期11卷 880-892页

作者： Soumaïla Ouédraogo marcel Bawindsom Kébré ariel Teyou Ngoupo Daouda Oubda François Zougmoré Laboratoire de matériaux et Environnement (LA.m.E)-UFR/SEA Université Joseph Ki-ZERBO Ouagadougou Burkina Faso Département de Physique Faculté des Sciences Université de Yaoundé I Yaoundé Cameroun

The development of cadmium-free CIGS solar cells with high conversion efficiency is crucial due to the toxicity of cadmium. Zinc-based buffer layers seem to be the most promising. In this paper, a numerical analysis using SCAPS-1D software was used to explore the Zn(mg,O) layer as an alternative to the toxic CdS layer. The effect of several properties such as thickness, doping, mg concentration of the Zn(mg,O) layer on the current-voltage parameters was explored and their optimal values were proposed. The simulation results reveal that the optimal value of the ZmO layer thickness is approximately 40 nm, the doping at 1017 cm-3 and an mg composition between 0.15 and 0.2. In addition, the effect of Gallium (Ga) content in the absorber as well as the Zn(mg,O)/CIGS interface properties on the solar cell’s performance was examined. The results show that contrary to the CdS buffer layer, the best electrical characteristics of the ZmO/CIGS heterojunction are obtained using a Ga-content equal to 0.4 and high interface defect density or unfavorable band alignment may be the causes of poor performances of Zn(mg,O)/CIGS solar cells in the case of low and high mg-contents.

关键词： Device modeling Zn(mg O) Cu(In Ga)Se2 Interface Sates Conduction Band Offset