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Mathematical modeling of drying characteristics of Jew’s mallow(Corchorus olitorius)leaves

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Information Processing in Agriculture 2019年第1期6卷 109-115页

作者： Adewale Olusegun Omolola Patrick francis Kapila Henry Mbitha Silungwe Department of Agricultural&Rural Engineering School of AgricultureUniversity of VendaPrivate Bag X5050Thohoyandou 0950South Africa Department of Food Science&Technology School of AgricultureUniversity of VendaPrivate Bag X5050Thohoyandou 0950South Africa

Drying behaviour of Jew’s mallow leaves using an oven dryer was *** influence of drying temperatures(50,60 and 70C)on moisture content of the leaves at stable air velocity was *** drying models,including,simple exponential,Page,Two-term exponential,Logarithmic,and Wang and Singh were fitted to drying ***-term exponential model adequately express the drying behaviour of Jew’s mallow *** moisture diffusivity of Jew’s mallow leaves ranged from 8.18×10^-8 to 1.13×10^-7m^2/*** of the computed effective diffusivity on oven temperature was *** energy required for oven drying of Jew’s mallow leaves was found to be 14.84 kJ/*** L^*,a^*,b^*,DE,a^*/b^*colour characteristics of the dried leaves range from 31.8 to 32.87,-3.73 to-4.37,13.6 to 16.47,69.00 to 69.73,and-0.26 to-0.34 *** drying conditions of 50℃150 min and 70℃90min resulted to dried leaves with desirable colour characteristics.

关键词： Jew’s mallow Oven drying Mathematical modeling Colour Effective diffusivity Activation energy

Effects of Blade Loading Distribution on the Cavitation and Excitation Forces of a Tunnel Thruster

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Journal of Shanghai Jiaotong university(Science) 2019年第2期24卷 158-167页

作者： YU Cheng DONG Xiaoqian YANG Chenjun LI Wei NOBLESSE francis State Key Laboratory of Ocean Engineering Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration Shanghai Jiao Tong University

Compared with open propellers, the impeller of a tunnel thruster is more vulnerable to cavitation and structural vibration problems because the impeller is typically subject to severe non-uniformity of inflow produced by the blunt gearbox. Model tests and numerical simulations are carried out in the cavitation tunnel of Shanghai Jiao Tong University for a tunnel thruster using a "flat plate" impeller and a tip-unloaded one. The characteristics of fluctuating pressures on the tunnel wall and the resultant excitation forces are investigated. It is found that although unloading the blade tips of an impeller is effective in reducing the fluctuating pressures in a local tunnel wall area near the tips, the same trend does not apply to the case of the excitation forces. The results show that care should be taken when the experimentally measured fluctuating pressures are utilized as the input to the analysis of structural vibrations.

关键词： tunnel thruster cavitation fluctuating pressures computational fluid dynamics(CFD)

Recognition of nestmate eggs in the ant Formicafusca is based on queen derived cues

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Current Zoology 2014年第1期60卷 131-136页

作者： Heikki HELANTERA Stephen J. MARTIN francis L.W. RATNIEKS Centre of Excellence in Biological Interactions Department of Biosciences POB 65 University of Helsinki Finland School of Environment & Life Sciences University of Salford Manchester M5 4WT UK Laboratory ofApiculture & Social Insects (LASI) School of Life Sciences University of Sussex Falmer Brighton UK

Inclusive fitness benefits depend on recognizing the right individuals to interact with. Social insect nests protect themselves from non-kin intruders through nestmate recognition based on chemical cues. The recognition cues on adult individu- als are from a mixture of genetic and environmental sources, but the ontogeny and use of recognition cues on eggs has not been previously assessed. We studied recognition by workers of eggs that were either nestmates or non-nestmates, and the ontogeny of recognition cues on eggs in the ant Formica fusca, a species with precise egg recognition abilities. Workers were able to dis- criminate among freshly laid eggs with no nest derived cues on them, and the egg surface chemicals varied among nests in these eggs, suggesting that queen derived cues are used in nestmate recognition. The results are discussed in the light of their implica- tions on deceptive social parasite strategies and within colony conflicts

关键词： Nestmate recognition Social insects Social parasitism Formicafusca Cuticular hydrocarbons

A solvent-free process enabling ZnO/porous carbon with enhanced microwave absorption

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Journal of Materials Science & Technology 2023年第18期149卷 255-264页

作者： Qi Chen Xing Liu Tingting Wang Xiaogang Su Meng Liu Somboon Chaemchuen francis Verpoort State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China School of Mathematical&Physical Sciences Wuhan Textile UniversityWuhan 430200China National Research Tomsk Polytechnic University Lenin Avenue 30634050 TomskRussian Federation School of Materials Science and Engineering North University of ChinaTaiyuan 030051China

Exploring a simple,rapid,solvent-free synthetic method for mass production of cheap,broadband mi-crowave absorbers remains the main ***,a mild solvent-free procedure is reported to syn-thesize zinc oxide nanoparticles(ZnO NPs)embedded in porous carbon derived from mixing sucrose and zinc nitrate *** characteristic morphology and the ZnO NPs distribution in these compos-ites were tuned using the different raw materials *** mesoporous structure of porous car-bon benefits the compositional advantages between carbon foam and ZnO *** optimal synthesized ZnO/C-2 carbon material demonstrates the strongest absorption of-41.7 dB with a frequency of 14.5 GHz at a thin thickness of 2 mm,and its widest effective absorption is close to 6 GHz(12.2-17.8 GHz).This work produces a feasible route for the sensible design of other effective microwave absorbers for large-scale production.

关键词： Solvent-free method Porous carbon Dielectric materials Interfacial polarization Microwave broadband absorption

Proactive reconciliation as a tool for integrating mining and milling operations

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International Journal of Mining Science and Technology 2019年第2期29卷 239-244页

作者： Ana Carolina Chieregati Luiz Eduardo Campos Pignatari francis Fernand Pitard Homero Delboni Jr Department of Mining and Petroleum Engineering University of Sao Paulo EDEM Engenharia Mineral francis Pitard Sampling Consultants

Historically, reconciliation has been viewed as a quality test of model estimates as well as a powerful tool for detecting and correcting problems in all stages of mine operations from resource estimation to metal production. If used correctly, reconciliation helps to better predict the life of mine(LOM), improves the adherence of production plans to the respective budget, and allows for effective control of the mining and milling processes. However, the accuracy of reconciliation results requires that all input data must be generated in accordance with the principles of sampling correctness. Furthermore, complete reconciliation systems can become extremely complex and must be carefully analyzed in order to provide realistic and helpful conclusions. Based on these concepts, this paper presents a successful proactive reconciliation system applied to a copper and gold mine in Brazil for monitoring and integrating mining and milling operations.

关键词： Reconciliation Prognostication Sampling Gold Copper

The influence of mitochondria in epigenetics revealed through naturally occurring fish cybrids

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Current Zoology 2012年第1期58卷 138-145页

作者： Angers, Bernard Dallairere, Antoine Vervaet, Simon Valliéres, francis Angers, Annie Department of Biological Sciences Universitéde ontréal C.P. 6128 succ. Centre-Ville Montréal Québec Canada H3C 3J7

Epigenetic processes are important mechanisms for phenotypic changes that occur in response to the environment. As such, it is expected that the alteration of cytoplasmic composition （the immediate environment of nuclei） results in the modifica- tion of the methylome and the expression of the nuclear genome. Cytoplasmic hybrids （or cybrids） are an ideal model to study the influence of mitochondria on gene expression. In this study, we take advantage of the natural of two biotypes that have a similar nuclear genome type Chrosomus eos, but harbor mitochondria from different species （C. eos in wild type or C. neogaeus in cybrids） to assess the effects of mitochondria on DNA methylation profiles and protein expression of the nuclear ge- nome. Comparison between these biotypes is particularly relevant given their recent divergence and their low level of genetic dif- ferentiation. Variations of DNA methylation assessed on tissues from different embryonic origins revealed the distinct profiles of cybrid and wild type populations. Differences are more pronounced between wild type and cybrids than between populations of a given biotype. The proteome is also more different between biotypes than within a given biotype. These results indicate a strong influence of mitochondria on the nuclear genome, which remains detectable in different genetic and environmental contexts. These changes in the methylome and proteome of cybrids are expected to reflect the adjustments imposed by the coexistence of nuclear and mitochondrial genomes from different species [Current Zoology 58 （1）： 138-145, 2012].

关键词： Epigenetics Mitochondria Chrosomus Phenotype

The High Light Response and Redox Control of Thylakoid FtsH Protease in Chlamydomonas reinhardtii

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Molecular Plant 2017年第1期10卷 99-114页

作者： Fei Wang Yafei Qi Alizee Malnoe Yves Choquet francis-Andre Wollman Institut de Biologie Physico-Chimique Unite Mixte de Recherche 7141 Centre National de la Recherche Scientifique/Universite Pierre et Marie Curie Paris 75005 France

In Chlamydomonas reinhardtii, the major protease involved in the maintenance of photosynthetic machinery in thylakoid membranes, the FtsH protease, mostly forms large hetero-oligomers （-1 MDa） comprising FtsH1 and FtsH2 subunits, whatever the light intensity for growth. Upon high light exposure, the FtsH subunits display a shorter half-life, which is counterbalanced by an increase in FTSH1/2 mRNA levels, resulting in the modest upregulation of FtsH1/2 proteins. Furthermore, we found that high light increases the protease activity through a hitherto unnoticed redox-controlled reduction of intermolecular disulfide bridges. We iso- lated a Chlamydomonas FTSH1 promoter-deficient mutant, ftsh1-3, resulting from the insertion of a TOC1 transposon, in which the high light-induced upregulation of FTSH1 gene expression is largely lost. In ftsh1- 3, the abundance of FtsH1 and FtsH2 proteins are loosely coupled （decreased by 70% and 30%, respectively） with no formation of large and stable homo-oligomers. Using strains exhibiting different accumulation levels of the FtsH1 subunit after complementation of ftsh1-3, we demonstrate that high light tolerance is tightly correlated with the abundance of the FtsH protease. Thus, the response of Chlamydomonas to light stress involves higher levels of FtsH 1/2 subunits associated into large complexes with increased proteolytic activity.

关键词： chloroplast protease regulation of gene expression photoinhibition Chlamydomonas reinhardtii

Combined risk modelling approach to identify the optimal carotid revascularisation approach

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Stroke & Vascular Neurology 2021年第3期6卷 476-482,I0080-I0084页

作者： James francis Burke Lewis B Morgenstern Nicholas H Osborne Rodney A Hayward Neurology University of Michigan Michigan MedicineAnn ArborMichiganUSA Vascular Surgery Univerity of Michigan MedicineAnn ArborMichiganUSA Internal Medicine University of Michigan Michigan MedicineAnn ArborMichiganUSA

Background Carotid endarterectomy(CEA)results in fewer perioperative strokes,but more myocardial infarctions(MI)than carotid artery stenting(CAS).We explored a combined modelling approach that stratifies patients by baseline stroke and *** Baseline registry-based risk models for perioperative stroke and MI were identified via literature *** then selected treatment risk models in the Carotid Revascularisation Stenting versus Endarterectomy(CREST)trial by serially adding covariates(baseline risk,treatment(CEA vs CAS),treatment-risk interaction and age-treatment interaction terms).Treatment risk models were externally validated using data from the Society for Vascular Surgery(SVS)Vascular Quality Initiative(VQI)CEA and carotid stenting registries and treatment models were recalibrated to the SVS-VQI *** net benefit was estimated by summing the predicted stroke and MI risk differences with CEA versus *** Perioperative treatment models had moderate predictiveness(c-statistic 0.69 for stroke and 0.68 for MI)and reasonable calibration across the risk spectrum for both stroke and MI within *** external validation in SVS-VQI,predictiveness was substantially reduced(c-statistic 0.61 for stroke and 0.54 for MI)and models substantially overpredicted *** patients(86.7%)were predicted to have net benefit from CEA in CREST(97.0%of symptomatic patients vs 75%of asymptomatic patients).Discussion A combined modelling approach that separates risk elements has potential to inform optimal ***,our current approach is not ready for clinical *** data support guidelines that suggest that CEA should be the preferred revascularisation modality in most patients with symptomatic carotid stenosis.

关键词： carotid Surgery optimal

Transcriptome analysis reveals different response of resistant and susceptible rice varieties to rice stripe virus infection

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Journal of Integrative Agriculture 2023年第6期22卷 1750-1762页

作者： LIU Yu LIU Wen-wen LI Li Frederic francis WANG Xi-feng State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193P.R.China Functional&Evolutionary Entomology Gembloux Agro-BioTechUniversity of LiègeGembloux 5030Belgium

Rice stripe disease,caused by rice stripe virus (RSV) which is transmitted by small brown planthopper (SBPH,Laodelphax striatellus Fallen),resulted in serious losses to rice production during the last 2 *** on the molecular differences between resistant and susceptible rice varieties and the interaction between rice and RSV remains *** this study,RNA-Seq was used to analyze the transcriptomic differences between the resistant and susceptible rice varieties at different times post RSV *** Gene Ontology (GO) annotation,the differentially expressed genes (DEGs) related to transcription factors,peroxidases,and kinases of 2 varieties at 3 time points were *** these 2 varieties,the DEGs associated with these 3 GOs were numerically less in the resistant variety than in the susceptible variety,but the expression showed a significant up-or down-regulation trend under the conditions of|log_2(Fold change)|>0&P_(adj)<0.05 by significance *** through Kyoto Encyclopedia of Genes and Genomes (KEGG) annotation,DEGs involved in some pathways that have a contribution to disease resistance including plant hormone signal transduction and plant–pathogen interaction were *** results showed that resistance responses regulated by abscisic acid (ABA) and brassinosteroids (BR) were the same for 2 varieties,but that mediated by salicylic acid (SA) and jasmonic acid (JA)/ethylene (ET) were *** DEGs in resistant and susceptible varieties at the 3 time points were identified in both PAMP-triggered immunity (PTI) and Effector proteintriggered immunity (ETI),with that most of the unigenes of the susceptible variety were involved in PTI,whereas most of the unigenes of the resistant variety were involved in *** results revealed the different responses of resistant and susceptible varieties in the transcription level to RSV infection.

关键词： transcriptomics resistance susceptibility rice stripe virus(RSV) infection