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International Journal of Biomathematics 2020年第1期13卷 79-140页

作者： A.m.Elaiw N.H.AlShamrani Department of mathematics Faculty of Science King Abdulaziz UniversityP.O.Box 80203 Jeddah 21589Saudi Arabia Department of mathematics Faculty of Science University of JeddahP.O.Box 80327 Jeddah 21589Saudi Arabia

In this investigation,we propose and analyze a virus dynamics model with multi-stages of infected *** model incorporates the effect of both humoral and cell-mediated immune *** consider two modes of transmissions,virus-to-cell and *** intracellular discrete-time delays have been integrated into the *** incidence rate of infection as well as the generation and removal rates of all compartments are described by general nonlinear *** derive five threshold parameters which determine the existence of the equilibria of the model under consideration.A set of conditions on the general functions has been established which is sufficient to investigate the global stability of the five equilibria of the *** global asymptotic stability of all equilibria is proven by utilizing Lyapunov function and LaSalle’s invariance *** theoretical results are illustrated by numerical simulations of the model with specific forms of the general functions.

关键词： Viral and cellular infections global stability adaptive immune response Lyapunov function multi-staged infected cells.

Species diversity,population structure and regeneration of woody species in fallows and mature stands of tropical woodlands of southeast Angola

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Journal of Forestry Research 2018年第6期29卷 1569-1579页

作者： Francisco m.P.Goncalves Rasmus Revermann manuel J.Cachissapa Amandio L.Gomes marcos P.m.Aidar Herbarium of Lubango ISCED HuilaSarmento Rodrigues Str.230 LubangoAngola Biocentre Klein Flottbek University of HamburgOhnhorststr.1822609 HamburgGermany Department of Biology Faculty of SciencesAgostinho Neto UniversityAv.4 de Fevereiro 714th FloorLuandaAngola Plant Physiology and Biochemistry Institute of BotanyCP 3005Sao PauloSP CEP:01061-970Brazil

This study in the dry tropical woodlands of SE Angola in Cuando-Cubango Province assessed the diversity and composition of woody species in fallows compared to those in mature woodlands. We assessed the population structure of the most harvested woody species by calculating size class distribution and evaluated their regeneration potential based on the density of saplings. The vegetation was surveyed in 20 plots of 20 × 50 m(1000 m2). In each plot, we measured the diameter at breast height(DBH) of all woody species with DBH ≥ 5 cm. The saplings were counted, identified and recorded; 718 individuals, corresponding to 34 species in 32 genera and 15 families were recorded. The size class distribution of target woody species showed three different patterns in fallows and mature woodlands. In general,most of the smaller diameter classes had more individuals than the larger ones did, showing that the regeneration may take place. However, in some diameter classes, the absence of larger stems indicated selective logging of larger trees. Few saplings were recorded in the fallows or mature woodlands; fire frequency and intensity is probably the main obstacle for seed germination and seedling survival rates in the studied area.

关键词： Baikiaea woodlands Fallows mature woodlands Regeneration Woody species

A new record of Pluteaceae(Agaricales)from Pakistan

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Studies in Fungi 2021年第1期6卷 514-518页

作者： Khan mB Ishaq m Fiaz m Saba m Wenhua L Galappaththi mCA Khalid AN Department of Botany Hazara University MansehraPakistan Department of Plant Sciences Quaid-i-Azam UniversityIslamabad-45320Pakistan Center for mountain Futures Kunming Institute of BotanyChinese Academy of ScienceKunmingP.R.China Postgraduate Institute of Science University of PeradeniyaPeradeniyaSri Lanka University of the Punjab Institut of BotanyQuaid-i-Azam Campus-54590LahorePakistan

During a survey of agarics from the Himalayan moist temperate regions in Pakistan,a new record Volvariella taylorii was *** description,color images of basidiocarps,drawings of microscopic features,and a phylogenetic ... 详细信息

关键词： phylogeny pink gills taxonomy volva Volvariella taylorii

A Fractal Dimension Based Framework for Night Vision Fusion

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IEEE/CAA Journal of Automatica Sinica 2019年第1期6卷 220-227页

作者： Gaurav Bhatnagar Q.m.Jonathan Wu IEEE the Department of mathematics Indian Institute of Technology Jodhpur the Department of Electrical and Computer Engineering University of Windsor

In this paper, a novel fusion framework is proposed for night-vision applications such as pedestrian recognition,vehicle navigation and surveillance. The underlying concept is to combine low-light visible and infrared imagery into a single output to enhance visual perception. The proposed framework is computationally simple since it is only realized in the spatial domain. The core idea is to obtain an initial fused image by averaging all the source images. The initial fused image is then enhanced by selecting the most salient features guided from the root mean square error(RmSE) and fractal dimension of the visual and infrared images to obtain the final fused *** experiments on different scene imaginary demonstrate that it is consistently superior to the conventional image fusion methods in terms of visual and quantitative evaluations.

关键词： Fractal dimension image fusion navigation and surveillance night vision

Prediction of breakdown strength of cellulosic insulating materials using artificial neural networks

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Journal of Advanced Dielectrics 2018年第1期8卷 25-28页

作者： Sakshi Singh m.m.mohsin Aejaz masood Department of Electrical Engineering Z.H.College of Engineering&Technology Aligarh muslim University AligarhUP 202002India

In this research work,a few sets of experiments have been performed in high voltage laboratory on various cellulosic insulating materials like diamond-dotted paper,paper phenolic sheets,cotton phenolic sheets,leatheroid,and presspaper,to measure different electrical parameters like breakdown strength,relative permittivity,loss tangent,*** the dependency of breakdown strength on other physical parameters,different Artificial Neural Network(ANN)models are proposed for the prediction of breakdown *** ANN model results are compared with those obtained experimentally and also with the values already predicted from an empirical relation suggested by Swanson and *** reported results indicated that the breakdown strength predicted from the ANN model is in good agreement with the experimental values.

关键词： Cellulosic materials relative permittivity loss tangent breakdown strength ANN

Remote photobiomodulation: an emerging strategy for neuroprotection

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Neural Regeneration Research 2019年第12期14卷 2086-2087页

作者： Luke C. Gordon Daniel m. Johnstone Bosch Institute University of Sydney NSW AustraliaDiscipline of Physiology University of Sydney NSW Australia

Photobiomodulation (PBm)- the irradiation of cells or tissues with low-intensity red to near-infrared light - is emerging as an effective means of enhancing cell and tissue resilience and repair. As reviewed elsewhere (Gordon et al., 2019), the intracellular effects of PBm appear to be primarily mediated by cytochrome C oxidase, a key enzyme in the mitochondrial respiratory chain and a primary photoacceptor of red to near-infrared light. Absorption of light by cytochrome C oxidase alters its redox state, resulting in increased ATP production, the liberation of nitric oxide and a transient burst in reactive oxygen species.

关键词： Remote photobiomodulation neuroprotection irradiation

multitarget therapeutic strategies for Alzheimer's disease

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Neural Regeneration Research 2019年第3期14卷 437-440页

作者： mostafa m.Ibrahim moustafa T.Gabr Department of Pharmacognosy Faculty of Pharmacy Mansoura University Department of Basic Pharmaceutical and Toxicological Sciences College of Pharmacy University of Louisiana at Monroe Department of medicinal Chemistry Faculty of Pharmacy Mansoura University Department of Chemistry University of Iowa

Neurodegenerative diseases such as Alzheimer's, Huntington's and Parkinson's diseases have multifaceted nature because of the different factors contributing to their progression. The complex nature of neurodegenerative diseases has developed a pressing need to design multitarget-directed ligands to address the complementary pathways involved in these diseases. The major enzyme targets for development of therapeutics for Alzheimer's disease are cholinesterase and β-secretase enzymes. In this review, we discuss recent advances in profiling single target inhibitors based on these enzymes to multitarget-directed ligands as potential therapeutics for this devastating disease. In addition, therapeutics based on iron chelation strategy are discussed as well.

关键词： multitarget-directed ligands acetylcholinesterase β-secretase Alzheimer's disease hybridization neurodegenerative diseases tacrine brain permeability

SILICON mICRO-TRENCH ETCHING USING HIGH-DENSITY PLASmA ETCHER

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Acta metallurgica Sinica(English Letters) 2005年第3期18卷 397-402页

作者： T.T.Sun Z.G.Liu H.C.Yu m.B.Chen J.m.miao PhysicsDepartmentofShanghaiJiaotongUniversity Shanghai200240China／／MicromachineCenterSchoolofMechanicalandProductionEngineeringNanyangTechnologicalUniversity639798Singapore PhysicsDepartmentofShanghaiJiaotongUniversity Shanghai200240China micromachineCenter SchoolofMechanicalandProductionEngineeringNanyangTechnologicalUniversity639798Singapore

Dry etching of silicon is an essential process step for the fabrication of micro electromechancal system (mEmS). The AZ7220 positive photo-resist was used as the etching mask and silicon micro-trenches were fabricated with a multiplexed indu ctively coupled plasma (ICP) etcher. The influence of resist pattern profile, an d etch condition on sidewall roughness were investigated detail. The results sho w that the sidewall roughness of micro-trench depends on profiles of photo-resis t pattern, the initial interface between the resist bottom surface and silicon s urface heavily. The relationship between roughness and process optimization para meters are presented in the paper. The roughness of the sidewall has been decrea sed to a 20-50nm with this experiment.

关键词： deep RIE silicon etching micro-trench photo-resist

Reproduction ecology of the recently invasive snake Hemorrhois hippocrepis on the island of Ilbiza Elba

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Current Zoology 2020年第4期66卷 363-371页

作者： Elba moNTES monica FERICHE Leticia Ruiz-SUEIRo Esmeralda ALAmINos Juan m.Pleguezuelos Department of Zoology Faculty of Biological SciencesUniversity of Valenciac/Dr.Moliner50BurjassotValencia E-46100Spain Department of Zoology Faculty of SciencesGranada UniversityGranada E-18071Spain Laboratory of Ecology and Evolution Butantan InstituteUniversity of Sao PauloAv.Vital Brazil1.500ButantaE-05503900Sao PauloBrasil Department of Sciences Granada Sciences ParkGranadaSpain*Address correspondence to Elba Montes

Knowing the causes of biological invasion success can be relevant to combat future invasive *** recent invasion of the horseshoe whip snake Hemorrhois hippocrepis on the island of Ibiza provides the opportunity to compare natural history traits between invasive and source populations,and to unravel what makes this snake a successful invader that is threatening the only endemic vertebrate of the island,Podarcis *** study compares the basic reproductive traits of mainland native and invasive populations of the *** results revealed that invasive populations were characterized by female maturity at a smaller size,extended reproductive period,and much lower reproduction frequency compared to the native *** contrast,some major reproductive traits--the abdominal fat body cycle,clutch size,hatchling body size,and hatchling body condition,did not differ between the two *** of these results must reflect the environmental differences in the recently invaded island with respect to the source area,and overall plasticity of reproductive *** is evolutionarily interesting,and may aid the succesful growth of this species in their invasiveness of mediterranean islands like *** most significant finding is that this expression of phenotypic plasticity occurred rapidly in this invasive population,within a period of 14 years *** results on the reproduction ecology of the invasive population were not conclusive regarding the factors determining the invasiveness of the snake and pointed to alternative causes.

关键词： lbiza invasion sucess islands reproduction frequency.snakes

Diversity and frequency of Nocardia *** the soil of Isfahan province,Iran

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Asian Pacific Journal of Tropical Biomedicine 2012年第6期2卷 474-478页

作者： Kachuei R Emami m mirnejad R Khoobdel m molecular Biology Research Center Baqiyatallah University of Medical Sciences Department of medical Parasitology and mycology Faculty of Public Health Tehran University of Medial Sciences Health Research Center Baqiyatallah University of Medical Sciences

Objective:To isolate and identify Nocardiaspp. from soil in different regions of Isfahan province in the center of ***:This study was conducted in 32 districts(16 cities and 16 villages)in Isfahan province during two years. A total of 800 soil samples from these regions were studied by using kanamycin. The isolated Nocardiaspecies were examined by gram and acid-fast staining and were identified biochemically and morphologically. The frequency and distribution of Nocardia spp. were determined in relation to different factors such as soil pH and temperate ***:From 153(19.1%)Nocardiaisolates identified,Nocardia asteroids(N. asteroids)complex(45.5%) andNocardia brasiliensis(N. brasiliensis)(24.7%) were the most frequently isolated species, followed by Nocardia otitidiscaviarum (2.2%),Nocardiopsis dassonvillei,Actinom adura actinomadura(each 1.7%) and Nocardia transvalensis(1.1%) and also unknown spp.(23.0%). In this study, most species(54.4%) of Nocardia, especially N. asteroides complex were isolated fromsoils with pH: 7.01-8, whereas in pH: 8.01-9 more N. brasiliensis was isolated. The most Nocardia spp. was detected from regions with semi-nomadic and temperate climate(41.1%).Conclusions:N. asteroids complex is more prevalent in Isfahan province and soil can be a potential source of nocardiosis infections. It is to be considering that climate and soil pH are involved in the frequency and diversity of aerobic Actinomy cetes.

关键词： Nocardia Nocardiosis Actinomycetes Soil microbiology Isfahan Iran Nocardia asteroids Climate