检索结果-南通市图书馆

Hydrogen cyanide production by soil bacteria: Biological control of pests and promotion of plant growth in sustainable agriculture

引用

Pedosphere 2022年第1期32卷 15-38页

作者： Anju sEHRAWAT satyavir s.sindhu Bernard R.GLICK Department of Microbiology CCS Haryana Agricultural UniversityHisar 125004India 2Department of BiologyUniversity of WaterlooWaterloo ON N2L 3G1Canada

Currently, plant diseases and insect infestations are mainly controlled by the extraneous application of pesticides. Unfortunately, the indiscriminate use of such agrochemicals can cause ecological and environmental problems, as well as human health hazards. To obviate the potential pollution arising from the application of agrochemicals, biological control of soilborne pathogens or insect pests using antagonistic microorganisms may be employed. Certain soil bacteria, algae, fungi, plants and insects possess the unique ability to produce hydrogen cyanide(HCN), which plays an important role in the biotic interactions of those organisms. In particular, cyanogenic bacteria have been found to inhibit the growth of various pathogenic fungi, weeds, insects, termites and nematodes. Thus, the use of HCN-producing bacteria as biopesticides offers an ecofriendly approach for sustainable agriculture. The enzyme, HCN synthase,involved in the synthesis of HCN, is encoded by the hcnABC gene cluster. The biosynthetic regulation of HCN, antibiotics and fluorescent insecticidal toxins through the conserved global regulatory Gacs/GacA system is elaborated in this review, including approaches that may optimize cyanogenesis for enhanced pest control. In addition, the effects of bacterially synthesized HCN on the production of indole acetic acid, antibiotics and fluorescent insecticidal toxins, 1-aminocyclopropane-1-carboxylate deaminase utilization and phosphate solubilization may result in the stimulation of plant growth. A more detailed understanding of HCN biosynthesis and regulation may help to elaborate the precise role of this compound in biotic interactions and sustainable agriculture.

关键词： biocontrol agent biopesticide cyanogenesis fluorescent insecticidal toxin pathogen

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Flow of colloidal suspension and irreversibility analysis with aggregation kinematics of nanoparticles in a microchannel

引用

Applied Mathematics and Mechanics(English Edition) 2020年第11期41卷 1671-1684页

作者： s.sindhu B.J.GIREEsHA Department of studies and Research in Mathematics Kuvempu UniversityShankaraghattaShivamogga 577451KarnatakaIndia

The current exploration focuses on the ethylene glycol(EG)based nanoliquid flow in a *** effectiveness of the internal heat source and linear radiation is reflected in the present *** estimation of suitable thermal conductivity model has affirmative impact on the convective heat transfer *** examination is conceded with the nanoparticle aggregation demonstrated by the Maxwell-Bruggeman and Krieger-Dougherty models which tackle the formation of *** models effectively describe the thermal conductivity and viscosity *** dimensionless mathematical expressions are solved numerically by the Runge Kutta Fehlberg approach.A higher thermal field is attained for the Bruggeman model due to the formation of thermal bridge.A second law analysis is carried out to predict the sources of irreversibility associated with the thermal *** is remarked that lesser entropy generation is obtained for the aggregation *** entropy generation rate declines with the slip flow and the thermal heat flux.A notable enhancement in the Bejan number is attained by increasing the Biot *** is established that the nanoparticle aggragation model exhibits a higher Bejan number in comparision with the usual flow model.

关键词： nanoparticle aggregation nanoliquid microchannel slip parameter heat flux

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Consequence of exponential heat generation on non-Darcy- Forchheimer flow of water based carbon nanotubes driven by a curved stretching sheet

引用

Applied Mathematics and Mechanics(English Edition) 2020年第11期41卷 1723-1734页

作者： B.J.GIREEsHA B.NAGARAJA s.sindhu G.sOWMYA Department of P.G.studies and Research in Mathematics Kuvempu UniversityShankaraghatta 577451India

The present article comprises the study on the influence of exponential space based heat generation on the non-Darcy-Forchheimer flow of carbon nanotubes(CNTs).The flow is considered over a curved stretching *** variables are used to reduce the flow descriptive nonlinear partial derivative equations to simple *** equations are then solved by the exploiting Runge-Kutta-Fehlberg fourth-and fifth-order *** numerical solutions are shown in graphs and *** between single and multi-walled CNTs has been established through the tabulated values and plotted *** is concluded that the heat source parameter plays a prime role in enhancement of temperature,and the curvature parameter has adverse impact on velocity and temperature *** the inertial parameter and inverse-Darcy number affect the fluid velocity.

关键词： exponential heat generation non-Darcy-Forchheimer flow carbon nanotube(CNT) curved stretching sheet

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Investigation of Ti6Al4V and AA7075 alloy embedded nanofluid flow over longitudinal porous fin in the presence of internal heat generation and convective condition

引用

Communications in Theoretical Physics 2020年第2期72卷 23-29页

作者： G sowmya B J Gireesha s.sindhu B C Prasannakumara Department of PG studies and Research in Mathematics Kuvempu UniversityShankaraghatta-577451KarnatakaIndia Department of Mathematics Davangere UniversityDavangere-577002KarnatakaIndia

The thermal attributes of porous fin due to radiation and natural convection have been carried out in the presence of nanofluid *** geometry of the fin taken for the analysis is rectangular profiled longitudinal *** temperature-dependent internal heat generation condition is also considered along with Darcy’s *** two types of nanofluid containing titanium alloy(Ti6Al4V)and aluminium alloy(AA7075)immersed in water is considered for the *** modelled nonlinear ordinary differential equation is numerically solved by the Runge–Kutta–Fehlberg *** impact of geometric parameter on the heat transfer analysis of the fin due to the flow of both nanofluids is plotted and consequences are physically *** is observed that the presence of the water-based titanium alloy better enhances the fin heat transfer rate.

关键词： alloys nanofluid porous fin heat transfer analysis convective condition internal heat generation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Passive steganalysis Based on Higher Order Image statistics of Curvelet Transform

引用

International Journal of Automation and computing 2010年第4期7卷 531-542页

作者： s.Geetha siva s.sivatha sindhu N.Kamaraj Department of Information Technology Thiagarajar College of Engineering Department of Electrical and Electronics Engineering Thiagarajar College of Engineering

steganographic techniques accomplish covert communication by embedding secret messages into innocuous digital images in ways that are imperceptible to the human eye. This paper presents a novel passive steganalysis strategy in which the task is approached as a pattern classification problem. A critical part of the steganalyser design depends on the selection of informative features. This paper is aimed at proposing a novel attack with improved performance indices with the following implications： 1） employing higher order statistics from a curvelet sub-band image representation that offers better discrimination ability for detecting stego anomalies in images, as compared to other conventional wavelet transforms; 2） increasing the sensitivity and specificity of the system by the feature reduction phase; 3） realizing the system using an efficient classification engine, a neuro-C4.5 classifier, which provides better classification rate. An extensive experimental evaluation on a database containing 5600 clean and stego images shows that the proposed scheme is a state-of-the-art steganalyser that outperforms other previous steganalytic methods.

关键词： Image steganalysis curvelet higher order statistics neuro-C4.5 classifier information forensics information security

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

synthesis,spectroscopic characterization and thermal studies of some lanthanide(Ⅲ) nitrate complexes with a hydrazo derivative of 4-aminoantipyrine

引用

Journal of Rare Earths 2009年第5期27卷 705-710页

作者： K.Mohanan C.J.Athira Y.sindhu M.s.sujamol Department of Chemistry University of Kerala

A heterocyclic ligand synthesized by the coupling of diazotized 4-aminoantipyrine with acetylacetone reacted with lanthanide(Ⅲ) nitrate to form complexes of the type [Ln(HAAP)2(NOз)з] where, Ln=La(Ⅲ), Ce(Ⅲ), Pr(Ⅲ), Nd(Ⅲ), sm(Ⅲ), or Gd(Ⅲ) and HAAP=3-{[2-(N-1-phenyl-2,3-dimethylpyrazol-3-in-5-on-4-yl)]hydrazone}pent-2,3,4-trione. The ligand and metal complexes were characterized on the basis of elemental analysis, molar conductance, magnetic susceptibility measurements, UV-Visible, infrared, far infrared and proton NMR spectral data. The spectral data revealed that the ligand existed in the hydrazo form and coordinated to the metal ion without deprotonation in a neutral tridentate manner, through carbonyl oxygen of pyrazolone ring, hydrazo nitrogen and carbonyl oxygen of the acetylace-tone moiety. The molar conductance values adequately supported their non-electrolytic nature. The ligand and the praseodymium(Ⅲ) complex were subjected to X-ray diffraction studies. Thermal decomposition behavior of the lanthanum(Ⅲ) complex was also examined.

关键词： 4-aminoantipyrine acetylacetone lanthanides thermogravimetry X-ray diffraction rare earths

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Neuro-genetic Based short-term Forecasting Framework for Network Intrusion Prediction system

引用

International Journal of Automation and computing 2009年第4期6卷 406-414页

作者： siva s. sivatha sindhu s. Geetha M. Marikannan A. Kannan Department of Computer science and Engineering College of Engineering Guindy Annauniversity Department of Information Technology Thiagarajar College of Engineering Department of Computer science and Engineering Institute of Road and Transport Technology

Information systems are one of the most rapidly changing and vulnerable systems, where security is a major issue. The number of security-breaking attempts originating inside organizations is increasing steadily. Attacks made in this way, usually done by ＂authorized＂ users of the system, cannot be immediately traced. Because the idea of filtering the traffic at the entrance door, by using firewalls and the like, is not completely successful, the use of intrusion detection systems should be considered to increase the defense capacity of an information system. An intrusion detection system （IDs） is usually working in a dynamically changing environment, which forces continuous tuning of the intrusion detection model, in order to maintain sufficient performance. The manual tuning process required by current IDs depends on the system operators in working out the tuning solution and in integrating it into the detection model. Furthermore, an extensive effort is required to tackle the newly evolving attacks and a deep study is necessary to categorize it into the respective classes. To reduce this dependence, an automatically evolving anomaly IDs using neuro-genetic algorithm is presented. The proposed system automatically tunes the detection model on the fly according to the feedback provided by the system operator when false predictions are encountered. The system has been evaluated using the Knowledge Discovery in Databases Conference （KDD 2009） intrusion detection dataset. Genetic paradigm is employed to choose the predominant features, which reveal the occurrence of intrusions. The neuro-genetic IDs （NGIDs） involves calculation of weightage value for each of the categorical attributes so that data of uniform representation can be processed by the neuro-genetic algorithm. In this system unauthorized invasion of a user are identified and newer types of attacks are sensed and classified respectively by the neuro-genetic algorithm. The experimental results obtained in this

关键词： Genetic algorithm intrusion detection system (IDs) neural networks weightage calculation knowledge discovery in databases (KDD) classification.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Incorporation of liquid fillers into silicone foams to enhance the electro-mechanical properties

引用

International Journal of smart and Nano Materials 2020年第1期11卷 11-23页

作者： Min Liu Liyun Yu sindhu Vudayagiri Anne Ladegaard skov school of Materials science and Engineering East China University of Science and TechnologyShanghaiChina Danish Polymer Centre Department of Chemical and Biochemical EngineeringTechnical University of DenmarkKongens LyngbyDenmark

silicone foams with and without liquid fillers(silicone oils of various types and glycerol,respectively)are synthesized and analyzed to be used as dielectric layers in capacitive sensors.A simple fabrication technique involving only four components *** 184,glycerol,sodium hydroxide and ethanol is used to make these silicone foams after which they are filled with silicone oil or glycerol by soaking the foam in respective *** and dielectric properties of the foams are *** oil reinforces the foam’s dielectric properties,softens the foam and improves its capacitive response,making it a very good dielectric material for fabricating capacitive pressure *** to dry silicone foams,foams filled with-and swollen by-chloropropyl-functional silicone oil,show a low Young’smodulus(31 kPa),a high and stable relative dielectric permittivity of around 5,and a high capacitive response of 132%for an appliedpressureof 12 *** of oil stabilizes the soft foam and ensures that it does not buckle under high pressure.

关键词： silicone foams electro-mechanical capacitive pressure sensors glycerol silicone oil chloropropyl-functional silicone oil

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

COVID-19 induced renal injury differs from that in other viral-infections

引用

Emergency and Critical Care Medicine 2022年第1期2卷 23-31页

作者： Rachel s.Parise Manoj Govindarajulu sindhu Ramesh Tony Thomas Timothy Moore Muralikrishnan Dhanasekaran Department of Drug Discovery and Development Auburn University Harrison School of PharmacyWalker BuildingAuburnAlabamaUSA Department of Mechanical Engineering Auburn UniversityAuburnAlabamaUSA

Background:Kidney injuries caused by several viral diseases have been reported worldwide among all age groups,races,and *** particular importance is coronavirus disease 2019(COVID-19),and its prevalence in communities infecting all patient populations with symptoms ranging from asymptomatic to severe,including complications and ***:Data were acquired from PubMed,scopus,Google scholar,Centers for Disease Prevention and Control(CDC),and Lexi-Comp using the following search terms:“COVID-19 and renal pathology,”“COVID-19 induced kidney disease,”“Viral infection induced kidney disease,”and“Viral infection induced renal damage.”Titles and abstracts were manually analyzed as per the exclusion and inclusion criteria of relevant articles;relevance of articles included studies on the pathology of a specific viral infection and the impact of the virus on the adult renal ***:The mechanisms for renal disease due to COVID-19 include direct renal tubular injury,cytokine storm,inflammation,thrombosis *** tubular necrosis,thrombotic events,and direct renal *** some mechanisms behind renal dysfunction among the studied viral infections are similar,the prevalence rates of kidney injury or damage *** might be described by recommended prophylactic and therapeutic approaches that can alter the viral infection characteristics and possibly the impact a particular organ ***:The patient population at risk was old in age and had a high body mass *** mechanisms associated with renal dysfunction are similar,including direct renal injury through angiotensin converting enzyme 2(ACE2)entry,inflammation,and *** renal pathology of coronaviruses that differs from that of other prevalent viral infections is the activation of cytokine storm,which causes elevations of a greater number and different kinds of cytokines than other viral infections.

关键词： COVID-19 Kidney damage Renal damage Renal pathology

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

synthesis,spectroscopic characterization,DNA cleavage and antibacterial studies of a novel tridentate schiff base and some lanthanide(III) complexes

引用

Journal of Rare Earths 2014年第4期32卷 379-388页

作者： K.Mohanan R.Aswathy L.P.Nitha Niecy Elsa Mathews B.sindhu Kumari Department of Chemistry University of Kerala Department of Chemistry Mother Teresa Women's University

A novel potential tridentate schiff base was prepared by condensing equimolar quantities of 2-hydroxyacetophenone and 2-aminopyrimidine in methanol. This ligand was versatile in forming a series of complexes with lanthanide ions such as La（III）, Pr（III）, Nd（III）, sm（III）, Gd（III）, Dy（III） and Yb（III）. The ligand and the metal complexes were characterized through elemental analysis, molar conductance, UV-Visible, IR, 1H NMR, and mass spectral studies. The spectral studies indicated that the ligand was coordinated to the metal ion in neutral tridentate fashion through the azomethine nitrogen, one of the nitrogen atoms in the pyrimidine ring and the phenolic oxygen without deprotonation. Thermal decomposition and luminescence property of lanthanum（III） complex were also examined. The X-ray diffraction patterns showed the crystalline nature of the ligand and its lanthanum（III） complex. The DNA cleavage studies of the ligand and the metal complexes were carried out and it was observed that the lanthanum（III） and neo-dymium（III） complexes cleaved the pUC19 DNA effectively. The ligand and the metal complexes were screened for their antibacte-rial activities. The metal complexes were found to be more potent bactericides than the ligand.

关键词： 2-aminopyrimidine lanthanides thermogravimetry luminescence DNA cleavage antibacterial activity rare earths

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：