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Geoscience Frontiers 2013年第1期4卷 113-122页

作者： P.Pratheesh V.Prasannakumar k.r.praveen Department of Geology University of KeralaKariavattom Campus.Thiruvananthapuram 695 581KeralaIndia

The Moyar Shear Zone （MSZ） of the South Indian granulite terrain hosts a prominent syenite pluton （-560 Ma） and associated NW-SE to NE-SW trending mafic dyke swarm （-65 Ma and 95 Ma）. Preliminary magnetic fabric studies in the mafic dykes, using Anisotropy of Magnetic Susceptibly （AMS） studies at low-field, indicate successive emplacement and variable magma flow direction. Magnetic lineation and foliation in these dykes are identical to the mesoscopic fabrics in MSZ mylonites, indicating shear zone guided emplacement. Spatial distribution of magnetic lineation in the dykes suggests a common conduit from which the source magma has been migrated. The magnetic foliation trajectories have a sigmoidal shape to the north of the pluton and curve into the MSZ suggesting dextral sense of shear. Identical fabric conditions for magnetic fabrics in the syenite pluton and measured field fabrics in mylonite indicate syntectonic emplacement along the Proterozoic crustal scale dextral shear zone with repeated reactivation history.

关键词： Magnetic fabrics Moyar Shear Zone Syenite pluton Mafic dykes Tectonic evolution

Ghost species form an important component of the epiphytic lichens in temperate forests

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Forest Ecosystems 2025年第01期 20-28页

作者： Jan Vondrák Ji?í ko?nar Stanislav Svoboda Zdeněk Palice Jaroslav ?oun Ji?í kubásek Pavel ríha Ji?í Malí?ek Jan rydlo Jeňyk Hofmeister Institute of Botany of the Czech Academy of Sciences Department of Botany Faculty of ScienceUniversity of South Bohemia Museum of Dr.Bohuslav Horák in rokycany Branch of Museum of West Bohemia Department of Experimental Plant Biology Faculty of ScienceUniversity of South Bohemia reDpeupbalritcment of Forest Ecology Faculty of Forestry and Wood SciencesCzech University of Life Sciences in Prague Global Change research Institute of the Czech Academy of Sciences

Sequencing of environmental samples has great potential for biodiversity research, but its application is limited by the lack of reliable DNA barcode databases for species identifications. Such a database has been created for epiphytic lichens of Europe, allowing us to compare the results of environmental sequencing with standard taxonomic surveys. The species undetected by taxonomic surveys(what we term the ghost component) amount to about half of the species actually present in hectare plots of Central European forests. Some of these, which currently occur only as diaspores or weakly developed thalli, are likely to be favoured in the course of global change. The ghost component usually represents a larger fraction in managed forests than in old-growth unmanaged forests. The total species composition of different plots is much more similar than suggested by taxonomic surveys alone. On a regional scale, this supports the well-known statement that“everything is everywhere,but, the environment selects”.

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The Potential of Wacapou (Vouacapoua americana) Extracts to Develop New Biobased Protective Solutions for Low-Durability Wood Species

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Journal of renewable Materials 2025年第1期13卷 79-100页

作者： Emma kieny kévin Candelier Louis Milhe Yannick Estevez Cyrielle Sophie romain Lehnebach Jérémie Damay Daniela Florez Emeline Houël Marie-France Thévenon Julie Bossu CIrAD Ecologie de Forêts de Guyane(EcoFoG)AgroparisTechCNRSINRAEUniversitéde GuyaneKourou97379France CIrAD UPR BioWooEBMontpellierF-34398France BioWooEB Universitéde MontpellierCIRADMontpellierF-34398France CNrS Ecologie de Forêts de Guyane(EcoFoG)AgroparisTechCIRADINRAEUniversitéde GuyaneKourouGuyane Française97379France Sorbonne Université CNRSLaboratoire de Biodiversitéet Biotechnologies MicrobiennesLBBMObservatoire OcéanologiqueBanyuls-sur-Mer66650France

The valorization of Amazonian wood residues into active chemical compounds could be an eco-friendly,cost-effective and valuable way to develop wood preservative formulations to enhance the decay and termite resistance of low-durable wood ***(Vouacapoua americana.,Fabaceae)is a well-known Guianese wood spe-cies commonly used in local wood construction due to its outstanding natural durability,which results from the presence of a large panel of extractives *** addition,its industrial processing generates large amounts of *** residues were extracted by maceration using four different solvents(water/ethanol,ethyl acetate,hexane and dichloromethane/methanol),separately and *** yield of each extractive fraction was determined,and their chemical compositions were analyzed by Liquid Chromatography-Mass Spectrometry(LC-MS).Ethyl acetate led to the highest extraction yield,and the active compounds were identiﬁed in the obtained extractive *** this sense,the fungicidal and termite-repellent properties of these extractives were then tested using a screening laboratory(with temperate and tropical microorganisms),according to the solution concentration(1%,2.5%,5%,8%and 10%).Finally,Virola michelii Heckel wood samples(low durable species)were impregnated with the 8%concentration *** impregnated wood samples were then exposed to a soil bed *** results highlighted that the nature of the solvent used during wood maceration affects the con-tent of the obtained extractive ***-Performance Liquid Chromatography–High-resolution Mass Spectrometry(UHPLC-HrMS)analyses showed the inﬂuence of extraction parameters on the nature of the extracted *** extracts(from ethyl acetate maceration)showed good anti-fungal and anti-termite ***,the concentration in extractives had an impact on the anti-termite activity level for reti-culitermesﬂavipes and Cryptotermes *** based on W

关键词： Anti-fungal and anti-termite activities conferred durability extractives French Guiana impregnation guianese species wood by-products

Spin squeezing in Dicke-class of states with non-orthogonal spinors

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Chinese Physics B 2019年第6期28卷 66-71页

作者： k S Akhilesh k S Mallesh Sudha praveen G Hegde Department of Physics University of MysoreManasagangotriMysuru-570006KarnatakaIndia Department of Physics Kuvempu UniversityShankaraghattaShimoga-577451India Inspire Institute Inc. AlexandriaVirginia 22303USA

The celebrated Majorana representation is exploited to investigate spin squeezing in different classes of pure symmetric states of N qubits with two distinct spinors, namely the Dicke-class of states. On obtaining a general expression for spin squeezing parameter, the variation of squeezing for different configurations is studied in detail. It is shown that the states in the Dicke-class, characterized by two-distinct non-orthogonal spinors, exhibit squeezing.

关键词： Majorana representation of pure symmetric multiqubit states spin squeezing Dicke states

Malaria slide bank plays a crucial role in achieving and sustaining malaria elimination in India

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Asian Pacific Journal of Tropical Medicine 2023年第10期16卷 431-433页

作者： Shrikant Nema Nitika Nitika Anup r Anvik.r praveen k Bharti ICMr-National Institute of Malaria research Sector 8Dwarka 110077New DelhiIndia

India's healthcare system continues to place the highest priority on the fight against malaria[1].Malaria elimination program has received considerable attention from both the public and private sectors,resulting in a significant drop in malaria cases[2].In 2022,a total of 176000 million cases of malaria were reported in India,in which Plasmodium(P.)falciparum has contributed 57.0%and 42.3%were *** cases and limited cases of *** and ***.

关键词： malaria Malaria elimination

TAk003 dengue vaccine:A promising tool for dengue control

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Asian Pacific Journal of Tropical Medicine 2024年第11期17卷 477-478页

作者： Nitika Nitika praveen k Bharti ICMr-National Institute of Malaria research Sector 8Dwarka110077New DelhiIndia Academy of Scientific and Innovative research NCR-DelhiIndia

Dengue,an arboviral disease caused by infection with one of the four distinct serotypes is one of the 10 global health threats confirmed by the World Health Organization(WHO)in 2019[1].There has been an exponential increase in dengue cases over last few years,attributed to unplanned urbanization,climate change,and migration,*** 4 billion people worldwide in more than 100 countries are at risk of dengue,and 390 million infections occur every year,with 90 million symptomatic infections[2].The spectrum ranges from asymptomatic,mild,to severe dengue,leading to hospitalizations and even death[3].Due to unavailability of therapeutics for treating dengue,it is imperative to expand the arsenal by including vaccines in the efforts to combat dengue worldwide.

关键词： dengue attributed exponential

Effects of P301L-TAU on post-translational modifications of microtubules in human iPSC-derived cortical neurons and TAU transgenic mice

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Neural regeneration research 2025年第8期20卷 2348-2360页

作者： Mohamed Aghyad Al kabbani Christoph köhler Hans Zempel Institute of Human Genetics Faculty of Medicine and University Hospital CologneUniversity of CologneCologneGermany Center for Molecular Medicine Cologne(CMMC) University of CologneCologneGermany Center Anatomy Department ⅡMedical FacultyUniversity of CologneCologneGermany

TAU is a microtubule-associated protein that promotes microtubule assembly and stability in the *** is missorted and aggregated in an array of diseases known as *** are essential for neuronal function and regulated via a complex set of post-translational modifications,changes of which affect microtubule stability and dynamics,microtubule interaction with other proteins and cellular structures,and mediate recruitment of microtubule-severing *** impairment of microtubule dynamics causes neuronal dysfunction,we hypothesize cognitive impairment in human disease to be impacted by impairment of microtubule *** therefore aimed to study the effects of a disease-causing mutation of TAU(P301L)on the levels and localization of microtubule post-translational modifications indicative of microtubule stability and dynamics,to assess whether P301L-TAU causes stability-changing modifications to *** investigate TAU localization,phosphorylation,and effects on tubulin post-translational modifications,we expressed wild-type or P301L-TAU in human MAPT-kO induced pluripotent stem cell-derived neurons(i Neurons)and studied TAU in neurons in the hippocampus of mice transgenic for human P301L-TAU(p r5 mice).Human neurons expressing the longest TAU isoform(2N4r)with the P301L mutation showed increased TAU phosphorylation at the AT8,but not the p-Ser-262 epitope,and increased polyglutamylation and acetylation of microtubules compared with endogenous TAU-expressing neurons.P301L-TAU showed pronounced somatodendritic presence,but also successful axonal enrichment and a similar axodendritic distribution comparable to exogenously expressed 2N4r-wildtype-TAU.P301L-TAU-expressing hippocampal neurons in transgenic mice showed prominent missorting and tauopathy-typical AT8-phosphorylation of TAU and increased polyglutamylation,but reduced acetylation,of microtubules compared with non-transgenic *** sum,P301L-TAU results in changes in micr

关键词： human induced pluripotent stem cell microtubules P301L pr5 mice TAU tauopathy tubulin code

Energy-and trust-aware secure routing algorithm for big data classification using Mapreduce framework in IoT networks

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International Journal of Modeling, Simulation, and Scientific Computing 2021年第2期12卷 80-103页

作者： S.Md.Mujeeb r.praveen Sam k.Madhavi Department of CSE Jawaharlal Nehru Technological University Anantapur(JNTUA)Ananthapuramu-515002 Andhra PradeshIndia Department of Computer Science and Engineering G.Pulla reddy Engineering College(Autonomous)Nandyal road Kurnool 518007Andhra PradeshIndia

Due to the open nature of wireless data transmission,routing and data security pose an important research challenge in the Internet of Things(IoT)-enabled ***,the characteristic features,like constrained resources,heterogeneity,uncontrolled environment,and scalability requirement,make the security issues even more ***,an effective and secure routing protocol named modified Energy Harvesting Trust-aware routing Algorithm(mod-EHTArA)is proposed to increase the energy efficiency and the lifespan of the *** proposed mod-EHTArA is designed by adopting the Link Lifetime(LLT)model with the traditional *** optimal secure routing path is effectively selected by the proposed mod-EHTArA using the cost metric,which considers the factors like delay,LLT,energy,and *** big data classification process is carried out at the Base Station(BS)using the Mapreduce ***,the big data classification is progressed using a stacked autoencoder,which is trained by the Adaptive E-Bat *** Adaptive E-Bat algorithm is developed by integrating the adaptive concept with the Bat Algorithm(BA)and Exponential Weighted Moving Average(EWMA).The proposed mod-EHTArA showed better performance by obtaining a maximal energy of 0.9855.

关键词： Stacked autoencoder big data classification Internet of Things secure routing energy harvesting

Isospin dependent properties of the isotopic chains of Scandium and Titanium nuclei within the relativistic mean-field formalism

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Chinese Physics C 2022年第8期46卷 155-169页

作者： praveen k.Yadav raj kumar M.Bhuyan School of Physics and Materials Science Thapar Institute of Engineering and TechnologyPatiala-147004PunjabIndia Center for Theoretical and Computational Physics Department of PhysicsFaculty of ScienceUniversity of MalayaKuala Lumpur 50603Malaysia Institute of research and Development Duy Tan UniversityDa Nang 550000Vietnam

Density-dependent nuclear symmetry energy is directly related to iso spin asymmetry for finite and infinite nuclear *** is critical to determine the coefficients of symmetry energy and their related observables because they hold great importance in different areas of nuclear physics,such as the analysis of the structure of ground state exotic nuclei and neutron star *** ground state bulk properties of Scandium(Z=21) and Titanium(Z=22) nuclei are calculated,such as their nuclear binding energy(B.E.),quadrupole deformation(β_2),two-neutron separation energy(S_(2 n)),differential variation in the two-neutron separation energy(dS_(2 n)),and root-mean-square charge radius(r_(ch)).The iso spin properties,namely the coefficient of nuclear symmetry energy and its components,such as the surface and volume symmetry energy of a finite isotopic chain,from the corresponding quantities of infinite nuclear matter,are also ***,we correlate the neutron-skin thickness with the coefficient of symmetry energy and the related observables corresponding to the isotopic chains of these *** coherent density fluctuation model(CDFM) is used to estimate the iso spin-dependent properties of finite nuclei,such as symmetry energy,surface symmetry energy,and volume symmetry energy,from their corresponding component in infinite nuclear *** relativistic mean-field(rMF) formalism with non-linear NL3 and relativistic-Hartree-Bogoliubov theory with density-dependent DD-ME2 interaction parameters are employed in the *** weight function |F(x)|^(2) is estimated using the total density of each nucleus,which in turn is used with the nuclear matter quantities to obtain the effective symmetry energy and its components in finite *** calculate the ground state bulk properties,such as nuclear binding energy,quadrupole deformation,two-neutron separation energy,differential variation in the two-neutron separation energy,and root-mean-square charge radius,fo

关键词： relativistic energy density functional symmetry energy weight function isospin asymmetry

High-Velocity Projectile Impact Behaviour of Friction Stir Welded AA7075 Thick Plates

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Defence Technology（防务技术） 2023年第11期29卷 153-163页

作者： r.praveen S.r.koteswara rao G.Selvakumar r.Damodaram Department of robotics and Automation Karpaga Vinayaga College of Engineering and TechnologyChengalpattu603308TamilNaduIndia Department of Mechanical Engineering Sri Sivasubramaniya Nadar College of EngineeringChennai603110TamilNaduIndia

In this study, high velocity impact behaviour of friction stir welded AA7075-T651 25 mm thick plates were investigated using a 7.62 mm × 51 mm lead core and 7.62 mm × 39 mm steel core projectiles. Prior to ballistic trails, mechanical and metallurgical properties of friction stir welded AA 7075-T651 25 mm thick plates were studied. Microstructural and hardness studies revealed that friction stir welds constituted three distinct regions namely Weld Nugget(WN), Thermo-Mechanically Affected Zone(TMAZ) and Heat Affected Zone(HAZ). Base Material(BM) and all three weld regions were ballistically tested as per military standard NIJ.0108.01 using lead and steel core bullets at maximum permissible velocities of 830 ± 20 and 700 ± 30 m/s, respectively. It has been found that base material(AA7075-T651)and all three weld regions of 25 mm thick plates were able to resist perforation by both types of projectiles used. However depth of penetration has been found to increase from BM to WN, HAZ and TMAZ for both types of projectiles. In all cases steel core projectiles caused higher depth of penetration compared to those caused by lead core projectiles. TMAZs of the friction stir welds were found to be the weakest zone. The fracture that occurred in the base material was spall fragmentation indicating brittle failure, whereas all zones of friction stir welded AA7075-T651 targets with a front petalling, indicating ductile failure. The post-ballistic tested samples showed no significant change in the microstructure of the BM and WN. On the other hand, TMAZ and HAZ showed severe grain deformation in the direction of projectile penetration, and the formation of adiabatic shear bands(ASB). This work showed that 25 mm thick friction stir welded AA7075-T651 joints responded well to ballistic impact loads, making them a good choice for light combat vehicles.

关键词： Aluminum alloy Thick plate Friction stir welding Ballistic performance Depth of penetration