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Predictive models of drought tolerance indices based on physiological,morphological and biochemical markers for the selection of cotton(Gossypium hirsutum L.)varieties

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Journal of Integrative Agriculture 2022年第5期21卷 1310-1320页

作者： Yeison m QUEVEDO Liz P mORENO Eduardo BARRAGAN Colombian Corporation for Agricultural Research AGROSAVIA日Espinal 733529Colombia Faculty of Agricultural Sciences National University of ColombiaBogota D.C 111321Colombia

The use of tolerant crop varieties is a strategy that mitigates the water deficit effect in a sustainable *** generation of these varieties is more efficient when variables associated with this tolerance have been identified,since they can facilitate the breeding *** study aimed to establish the relationships between water deficit tolerance of four cotton varieties(Nevada-123,Oasis-129,Guatapuri,and Festivalle)and morphological variables(monopodial branches,boll weight,root/shoot ratio,and leaf and root dry matter),physiological variables(relative water content,net photosynthesis,stomatal conductance,electron transport rate,photochemical quenching,photochemical efficiency of PSII,chlorophyll a/b ratio(Chl a/b),C^(12)/C^(13)isotope ratio,and electrolyte leakage),and biochemical variables(contents of sugars,proline,carotenoids,and malondialdehyde).Furthermore,calibrated predictive models of the drought tolerance indices were developed based on the key variables *** this purpose,a pot experiment was established where plants were subjected to a moderate or severe water deficit during the blooming stage for 12 *** stress tolerance index(STI)and mean productivity(mP)were *** the evaluated variables,the differences between well-watered and water deficit plants(Δ)were calculated and ANOVA,partial least squares,Pearson’s correlation,and multiple linear regression analyzes were performed.A model was generated that explained 95% of the STI and was composed of Δmalondialdehyde,Δproline,and Δboll *** mP,the model was comprised of Δstomatal conductance,Δroot/shoot ratio,and ΔChl a/b,and explained 89% of the *** analysis of the assessed variables allowed the identification of key variables and the development of calibrated predictive models that can be used in screening to obtain cotton varieties with different levels of water deficit tolerance.

关键词： drought tolerance tolerance index proline chlorophyll stomatal conductance malondialdehyde yield multivariate analysis

Global properties of a cell mediated immunity in HIV infection model with two classes of target cells and distributed delays

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International Journal of Biomathematics 2014年第5期7卷 119-143页

作者： A. m. Elaiw R. m. Abukwaik E. O. Alzahrani Department of mathematics Faculty of Science King Abdulaziz University P. O. Box 80203 Jeddah 21589 Saudi Arabia Department of mathematics Faculty of Science AI-Azhar University Assiut Egypt

In this paper, we study the global properties of a human immunodeficiency virus （HIV） infection model with cytotoxic T lymphocytes （CTL） immune response. The model is a six-dimensional that describes the interaction of the HIV with two classes of target cells, CD4＋ T cells and macrophages. The infection rate is given by saturation functional response. Two types of distributed time delays are incorporated into the model to describe the time needed for infection of target cell and virus replication. Using the method of Lyapunov functional, we have established that the global stability of the model is determined by two threshold numbers, the basic infection reproduction number R0 and the immune response activation number R0. We have proven that if R0 ≤ 1, then the uninfected steady state is globally asymptotically stable （GAS）, if R0≤ 1 〈 R0, then the infected steady state without CTL immune response is GAS, and if R0〉 1, then the infected steady state with CTL immune response is GAS.

关键词： Global stability HIV dynamics delay cell mediated immunity.

Sequence assembly using next generation sequencing data —challenges and solutions

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Science China(Life Sciences) 2014年第11期57卷 1140-1148页

作者： CHIN Francis Y.L. LEUNG Henry C.m. YIU S.m. Department of Computer Science The University of Hong Kong

Sequence assembling is an important step for bioinformatics *** the help of next generation sequencing(NGS)technology,high throughput DNA fragment(reads)can be randomly sampled from DNA or RNA molecular ***,as the positions of reads being sampled are unknown,assembling process is required for combining overlapped reads to reconstruct the original DNA or RNA *** with traditional Sanger sequencing methods,although the throughput of NGS reads increases,the read length is shorter and the error rate is *** introduces several problems in ***,paired-end reads instead of single-end reads can be sampled which contain more *** existing assemblers cannot fully utilize this information and fails to assemble longer *** this article,we will revisit the major problems of assembling NGS reads on genomic,transcriptomic,metagenomic and metatranscriptomic *** will also describe our IDBA package for solving these *** package has adopted several novel ideas in assembling,including using multiple k,local assembling and progressive depth *** with existence assemblers,IDBA has better performance on many simulated and real sequencing datasets.

关键词： genomic assembling de Bruijn graph paired-end reads next generation sequencing

Transient Free Convection and Heat Transfer in a Partitioned Attic-Shaped Space under Diurnal Thermal Forcing

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Energy Engineering 2021年第3期118卷 487-506页

作者： Suvash C.Saha Ali m.Sefidan Atta Sojoudi mohammad m.molla School of mechanical and mechatronic Engineering Faculty of Engineering and Information TechnologyUniversity of Technology SydneyUltimoNSW 2007Australia mechanical Engineering Department University of CanterburyChristchurch8041New Zealand mechanical Engineering Department University of TehranTehranIran Department of mathematics and Physics North South UniversityDhaka1229Bangladesh

One primordial consideration in residential ventilation standards is the comfort of provided to people living in those *** is highly dependent on the thermal and fluid flow conditions,the space geometry and so *** designs may reduce the energy usage,making the buildings more sustainable over a longer period of *** study aims to investigate the impact of whole day thermal conditions on the fluid flow structure and heat transfer phenomena,mainly natural convection,inside a partitioned attic-shaped *** Finite Volume method is applied to solve the governing *** thermal boundary condition is applied on the sloping walls to illustrate the characteristics of primary flow through daily cycles.A highly thermal conductive partition was placed vertically at the middle of the *** that through the partition,only heat could freely transfer between two fluid *** show that,during day time,a stratified fluid flow structure is obtained,which originates from the prevailing conduction heat transfer mechanism,while,for the night-time it changed into a strong convection mechanism which significantly affects the flow *** results are particularly important for understanding the fluid dynamics inside the attic shaped building and also designing new residential building.

关键词： Free convection attic space partitioned diurnal thermal forcing computational fluid dynamics

Biodecoloration of Reactive Black 5 by the methylotrophic yeast Candida boidinii mm 4035

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Journal of Environmental Sciences 2017年第3期29卷 78-87页

作者： maria m.martorell Hipo1ito F.Pajot Pablo m.Ahmed Lucia I.C.de Figueroa Antarctic Argentinian Institute Balcarce 290CABAArgentina PROImI-CONICET TucumánArgentina Department of Products Quality IV San Pablo University-TucumdnTucumánArgentina Agroindustrial Experimental Station Obispo Colombres TucumánArgentina Department of Superior microbiology Faculty of BiochemistryChemistry and PharmacyNational University of TucumánTucumánArgentina

Azo dyes are extensively used in textile dyeing and other industries. Effluents of dying industries are specially colored and could cause severe damage to the environment. The anaerobic treatment of textile dying effluents is nowadays the preferred option, but it could generate carcinogenic aromatic amines. Recently, yeasts have become a promising altemative, combining unicellular growth with oxidative mechanisms. This work reports the characterization of the first methylotrophic yeast with dye decolorizing ability, Candida boidinii mm 4035 and some insights into its decoloration mechanism. The analysis of two selected media revealed a possible two stages mechanism of Reactive Black 5 decoloration. In glucose poor media, decoloration is incomplete and only the first stage proceeds, leading to the accumulation of a purple compound. In media with higher glucose concentrations, the yeast is able to decolorize totally an initial concentration of 200 mg/L. The entire process is co-metabolic, being largely dependent on glucose concentration but being able to proceed with several nitrogen sources. manganese dependent peroxidase but not laccase activity could be detected during decoloration. Aromatic amines do not accumulate in culture media, supporting an oxidative decoloration mechanism of unknown ecophysiological relevance.

关键词： Biodecoloration Dyesmethylotrophic yeasts medium optimization

An adaptive neuro-fuzzy sliding mode controller for mImO systems with disturbance

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Chinese Journal of Chemical Engineering 2017年第4期25卷 463-476页

作者： mahmoud m.Saafan mohamed m.Abdelsalam mohamed S.Elksas Sabry F.Saraya Fayez F.G.Areed Computers and Control Systems Engineering Department Faculty of EngineeringMansoura UniversityEgypt

This paper introduces the mathematical model of ammonia and urea reactors and suggested three methods for designing a special purpose controller. The first proposed method is Adaptive model predictive controller, the second is Adaptive Neural Network model Predictive Control, and the third is Adaptive neuro-fuzzy sliding mode controller. These methods are applied to a multivariable nonlinear system as an ammonia–urea reactor system. The main target of these controllers is to achieve stabilization of the outlet concentration of ammonia and urea, a stable reaction rate, an increase in the conversion of carbon monoxide(CO) into carbon dioxide(CO_2) to reduce the pollution effect, and an increase in the ammonia and urea productions, keeping the NH_3/CO_2 ratio equal to 3 to reduce the unreacted CO_2 and NH_3, and the two reactors' temperature in the suitable operating ranges due to the change in reactor parameters or external disturbance. Simulation results of the three controllers are compared. Comparative analysis proves the effectiveness of the suggested Adaptive neurofuzzy sliding mode controller than the two other controllers according to external disturbance and the change of parameters. moreover, the suggested methods when compared with other controllers in the literature show great success in overcoming the external disturbance and the change of parameters.

关键词： disturbance sliding ammonia stabilization outlet predictive monoxide dioxide overcome steam

Quiet in the nest:The nest environment attenuates song in a grassland songbird

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Avian Research 2023年第4期14卷 623-629页

作者： Sarah L.Dobney mikayla m.K.Bornais D.Ryan Norris Amy E.m.Newman Heather Williams Stéphanie m.Doucet Daniel J.mennill Department of Integrative Biology University of WindsorWindsorOntarioN9B 3P4Canada Department of Integrative Biology University of GuelphGuelphOntarioN1G 2W1Canada Biology Department Williams CollegeWilliamstownMA01267USA

The nest environment may limit the ability of nest-bound birds to hear sounds from the outside *** vocal learning species,such as humans and songbirds,it is vital for young animals to hear the voices of conspecific animals early in *** songbirds,nest structure varies considerably across species,and the resulting impact on sound transmission may have consequences for vocal learning in *** this study,we tested the hypothesis that the nest environment attenuates song of Savannah Sparrows(Passerculus sandwichensis),grassland songbirds that build nests on the ground under cover of dense *** recorded live Savannah Sparrows singing at variable distances from 21 *** recorded songs using one microphone inside the nest(the typical position of a nestling)and another placed 1 m directly above the nest(a typical position of an adult).We found a substantial reduction in signal-to-noise ratio,where songs recorded inside the nest were an average of 11 dB lower than songs recorded directly above the *** estimate that the attenuation imposed by the nest reduced the maximum acoustic environment from 117.7 m(for recordings above the nest),to 78.6 m(for recordings within the nest),which is analogous to listening from a position 39.1 m farther away from the *** research estimated that song transmits up to 100 m in this species,so any adult male within 100 m of a young bird was previously considered a potential vocal *** reducing the nestling acoustic environment from 100 m to 78.6 m,the number of male tutors available to nestlings is reduced by an average of 27%.Given the growing evidence that song learning begins very early in life,future research on vocal development should account for how the structural properties of the natal environment affect the songs that nestlings hear.

关键词： Acoustic environment Nest environment Songbird Sound attenuation Vocal learning

Simulation of cooling channel rheocasting process of A356 aluminum alloy using three-phase volume averaging model

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中国有色金属学会会刊:英文版 2005年第2期15卷 389-394页

作者： T.Wang B.Pustal m.Abondano T.Grimmig A.Bührig-Polaczek m.Wu A.Ludwig Foundry Institute Aachen University of TechnologyAachenD-52072Germany Department of metallurgy University of LeobenLeobenA-8700Austria Research Center of Foundry Engineering Dalian University of TechnologyDalian 116024China

The cooling channel process is a rehocasting method by which the prematerial with globular microstructure can be produced to fit the thixocasting process.A three-phase model based on volume averaging approach is proposed to simulate the cooling channel process of A356 Aluminum *** three phases are liquid,solid and air respectively and treated as separated and interacting continua,sharing a single pressure *** mass,momentum,enthalpy transport equations for each phase are *** developed model can predict the evolution of liquid,solid and air fraction as well as the distribution of grain density and grain *** effect of pouring temperature on the grain density,grain size and solid fraction is analyzed in detail.

关键词： A356 alloy modeling cooling channel three-phase semi-solid

Biocompatibility and biotoxicity of in-situ synthesized carboxylated nanodiamond-cobalt oxide nanocomposite

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Journal of materials Science & Technology 2017年第8期33卷 879-888页

作者： L.Syam Sundar Naser A.Anjum m.C.Ferro Eduarda Pereira manoj K.Singh A.C.m.Sousa TEmA-Department of mechanical Engineering University ofAveiroAveiroPortugal CESAm-Centrefor Environmental&marine Studies and Department of Chemistry University of Aveiro3810-193AveiroPortugal CICECO Department of Material Engineering and CeramicsUniversity of AveiroPortugal

A nanocomposite that incorporates cobalt oxide（Co3O4） and nanodiamond（ND） can present both high magnetism（Co3O4） and high hardness（ND）. ND particles have potential applications in a variety of fields such as protein immobilization, biosensors, therapeutic molecule delivery and bio-imaging. However,limited information is available in literature on the in-situ synthesis of biocompatible magnetic materials and also on their potential biotoxicity as a result of their entry into environmental compartments and subsequent interaction with biota. In this work, a new kind of bio-compatible magnetic material –carboxylated nanodiamond（c ND） and Co3O4 was synthesized to obtain the c ND-Co3O4 *** synthesis procedure involved in-situ and chemical reduction of cobalt chloride（CoCl（26）H2O） and sodium borohydrate（NaBH4）. The synthesized cND-Co3O4 nanocomposite was characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. The cyto-genotoxicity of the synthesized nanocomposite material was studied by using onion（Allium cepa L.） as a test model with concentrations of 5, 10 and 20 μg/ml. The study was also extended to cND and Co3O4 materials for comparison purpose. Co3O4 and cND exhibited their contrasting effects on mitosis and other cyto-genotoxic indices studied herein. This work provided fundamental data on the synthesis and the bio-toxicity of the c ND-Co3O4 nanocomposite, which, in turn, can help to expand their multidisciplinary applications.

关键词： Nanodiamond Cobalt oxide Nanodiamond Nanocomposite Bio-toxicity Allium cepa