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Preliminary studies on the lichens growing in FEEDs campus and sB garden in Manipur,India

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studies in Fungi 2020年第1期5卷 392-399页

作者： nayaka s Joseph s Ngangom R Tilotama K Arnold PK Lichenology Laboratory CSIR-National Botanical Research InstituteRana Pratap MargLucknow 226001Uttar PradeshIndia Foundation for Environment and Economic Development services(FEEDs) HengbungKangpokpi-795129ManipurIndia

In our continuous effort to explore the lichens in new and interesting areas FEEDs campus and sBG garden located in Manipur,a north-eastern state of India are *** study resulted in 47 species in FEEDs campus and 80 species in sB garden respectively,while both areas shared 22 species in *** crustose lichens were more dominant in the area represented by Graphidaceae(16 spp.)and Pyrenulaceae(15 spp.).The species composition in both the sites represented photophilic communities such as graphidaceous,physcioid and parmelioid *** campus had open areas with cultivated plants where as sBG garden had semi-evergreen forest at its initial stage of *** study also added 55 lichen species as new distributional records to Manipur.

关键词： Biodiversity Lichenized fungi Mycobiota North east India Taxonomy

Additions to the lichen flora of Assam with special reference to Astrothelium alboverrucoides,a new record to India

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studies in Fungi 2021年第1期6卷 342-351页

作者： Daimari R Islary P Brahma s Basumatary s Goswami JP nayaka s Joseph s Department of Botany Bodoland UniversityKokrajharAssam-783370India Lichenology Laboratory CSIR-National Botanical Research InstituteLucknow-226001India

The present study enumerates the diversity of corticolous lichens from Kokrajhar district of Assam *** study records 54 species of lichens belonging to 21 genera and 14 *** of the species are crustose(44 species)and 10 are *** of the species,Astrothelium alboverrucoides is a new record to India while five species viz.,Graphis sayeri,Hemithecium croceum,Malmidea piperis,Ocellularia allosporoides and Porina belanospora are new additions to the lichen biota of *** the species,nine are endemic to *** is the dominant family and Dirinaria consimilis is frequently found in all the study *** indicates its scope for future applications in other studies related to lichens in the region.

关键词： Corticolous Enumeration Ultapani Forest range University campus

Lichens of the sirumalai hills,Eastern Ghats with one genus and six species new to India

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studies in Fungi 2021年第1期6卷 204-212页

作者： nayaka s Joseph s Rajaram sK Natesan s sankar K David MLR Upreti DK Lichenology Laboratory CSIR-National Botanical Research InstituteRana Pratap MargLucknow-226001Uttar PradeshIndia Department of Biotechnology Kamaraj College of Engineering and TechnologyK.VellakulamNear VirudhunagarMadurai-625701Tamil NaduIndia

Lichens of sirumalai hills are reported here for the first *** biota comprised of 95 *** genus Japewiella is reported for the first time in India and is represented by ***(***.)***,the following six taxa including one variety are new to India *** atra(Pers.)***.,Graphis brevicarpa ***.,Kashiw.&***,Micarea erratica(Körb.)Hertel,Rambold&Pietschm.,Pertusaria cicatricosa *** ***,Elix&streimam,Porina subargillacea Müll Arg.,and Pyxine schmidtii *** accounts for all the new records to India are provided to facilitate their *** redingeri Grube and Lepraria caesiella *** are reported for the first time from south *** all above,29 species are recorded for the first time from the state of Tamil *** lichen biota of the area is primarily corticolous in habitats and dominated by crustose form.

关键词： lichenized fungi new records south India Tamil Nadu tropical lichens

First report of lichens from ***’s Islands,the south west coast,India

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studies in Fungi 2018年第1期3卷 264-270页

作者： Joseph s Dudani sN nayaka s Lichenology Laboratory CSIR-National Botanical Research InstituteRana Pratap MargLucknowPIN-226001Uttar PradeshIndia

The paper presents the first ever report on lichens of ***’s Island with a total of 20 species belonging to 13 *** species,Pertusaria dehiscens *** ***&Elix and Porina howeana *** are reported as new records for *** ... 详细信息

关键词： Biodiversity coastal lichens Karnataka state lichenized Ascomycota new records

New and noteworthy records of lichens from Pathanamthitta district,Kerala,India

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studies in Fungi 2018年第1期3卷 349-356页

作者： Zachariah sA nayaka s Joseph s Gupta P Thomas s Varghese sK Department of Botany Mar Thoma CollegeKuttapuzhaTiruvallaKerala-689103India Lichenology Laboratory National Botanical Research InstituteRana Pratap MargLucknow-226001India Department of Botany SB CollegeChanganacherryKottayamKerala-686101India

Lichen biota of Pathanamthitta district of Kerala state was thoroughly studied which resulted in 24 lichen species as new to Kerala and one species,Phaeographis nylanderi(Vain.)*** new to *** the species identified are either crustose or foliose forms belonging to families Graphidaceae and Caliciaceae indicating the dominance of these groups in the study *** of all the 25 species are provided along with their distribution.

关键词： Biodiversity Caliciaceae Endemic Graphidaceae Lichenized fungi Western Ghats

Investigation of dry sliding wear properties of multi-directional forged Mg-Zn alloys

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Journal of Magnesium and Alloys 2019年第3期7卷 444-455页

作者： s.Ramesh Gajanan Anne H.shivananda nayaka sandeep sahu M.R.Ramesh Department of Mechanical Engineering National Institute of Technology KarnatakaSurathkal 575025India Department of Mechanical Engineering Shri Madhwa Vadiraja Institute of Technology and ManagementUdupiKarnataka 574115India Department of Materials science and Engineering Indian Institute of Technology KanpurKanpur 208016India

Effect of multi-directional forging(MDF)on wear properties of Mg-Zn alloys(with 2,4,and 6wt%Zn)is *** sliding wear test was performed using pin on disk machine on MDF processed and homogenized *** behavior of samples was analyzed at loads of ION and 20 N,with sliding distances of 2000m and 4000m,at a sliding velocity of 3m/*** of worn samples were observed under scanning electron microscopy(sEM),energy dispersive spectroscopy(EDs),and x-ray diffraction(XRD)and the results were *** properties were evaluated using microhardness *** 5 passes of MDF,the average grain size was found to be 30±4p m,22±3 pm,and 18±3 pm,in Mg-2%Zn,Mg-4%Zn,and Mg-6%Zn alloys,respectively,with significant improvement in hardness in all *** resistance was improved after MDF processing,as well as,with increment in Zn content in Mg ***,it decreased when the load and the sliding distance *** surface exhibited ploughing,delamination,plastic deformation,and wear debris along sliding direction,and abrasive wear was found to be the main mechanism.

关键词： Multi-directional forging Mg-Zn alloy Microhardness Wear Coefficient of friction

Effect of equal channel angular pressing on AZ31 wrought magnesium alloys

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Journal of Magnesium and Alloys 2013年第4期1卷 336-340页

作者： Avvari Muralidhar s.Narendranath H.shivananda nayaka Mechanical Engineering Department National Institute of Technology Karnataka(NITK)SurathkalSrinivasanagarMangalore 575025KarnatakaIndia

AZ31 wrought magnesium alloys are light weight materials which play an important role in order to reduces the environmental burdens in modern society because of its high strength to weight ratio,corrosion resistance,and stiffness and *** of this material are mainly in structural component i.e.,in constructions,automobile,aerospace,electronics and marine *** the present work,the microstructure characterization of the AZ31 alloys up to four ECAP passes at temperature of 573 K was observed for route *** grain size of the material was reduced from 31.8μm to 8μm after four ECAP *** properties of the alloy improved with increase in number of ECAP ***,X-ray diffraction analysis was carried out for as received and ECAP processed material.

关键词： ECAP AZ31 alloy Grain refinement Microstructure Mechanical properties XRD

Comparative study on Tool Fault Diagnosis Methods Using Vibration signals and Cutting Force signals by Machine Learning Technique

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structural Durability & Health Monitoring 2020年第2期14卷 127-145页

作者： suhas s.Aralikatti K.N.Ravikumar Hemantha Kumar H.shivananda nayaka V.sugumaran NationalInstitute of Technology Karnataka Mangaluru575025India Vellore Institute of Technology University Chennai600127India

The state of cutting tool determines the quality of surface produced on the machined parts.A faulty tool produces poor sur face,inaccurate geometry and non-economic ***,it is necessary to monitor tool condition for *** process to have superior quality and economic *** the pre-sent study,fault classification of single point cutting tool for hard turning has been carried out by employing machine learning *** force and vibration signals were acquired to monitor tool condition during machining.A set of four tooling conditions namely healthy,worn flank,broken insert and extended tool overhang have been considered for the *** machine learning technique was applied to both vibration and cutting force *** wavelet features of the signals have been extracted using discrete wavelet trans formation(DWT).This transformation represents a large dataset into approximation coeffcients which contain the most useful information of the *** features,among features extracted,were selected using J48 decision tree ***-sification of tool conditions was carried out us ing Naive Bayes algorithm.A 10 fold cross validation was incorporated to test the validity of classifier.A comparison of performance of classifier was made between cutting force and vibration signal to choose the best signal acquisition method in classifying tool fault conditions using machine learning technique.

关键词： Fault diagnosis of cutting tool Naive Bayes classifer,decision tree technique

Larvicidal potential of selected indigenous lichens against three mosquito species–Culex quinquefasciatus, Aedes aegypti and Anopheles stephensi

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Chinese Herbal Medicines 2018年第2期10卷 152-156页

作者： syed Zameer Ahmed Khader sidhra syed Zameer Ahmed Kisore Perundurai Venkatesh Kamaraj Chinnaperumal sanjeeva nayaka Department of Biotechnology K.S.Rangasamy College of Technology Department of Biotechnology Periyar University Indian Lichenological society Lichenology Laboratory Plant Diversity Systematics and Herbarium Division CSIR-National Botanical Research Institute (Govt. of India)

Objective：Mosquitoes are the major transmitting vectors of serious human diseases,causing millions of deaths every year with undesirable effects,including toxicity to non-target *** plants with insecticidal properties have been used in recent years for the control of a variety of pest insects and *** the quest for alternative natural biological control agents against mosquito larvae lichens were ***：Larvicidal activity was assessed with methanolic extracts of Parmotrema reticulatum,Parmotrema kamatti,Parmotrema tinctorum,Parmelia erumpens,Leptogium papilosum,and Roccella montagnei against Aedes aegypti,Anopheles stephensi,and Culex *** standard WHO protocols with minor modifications were adopted and the bioassay was evaluated at the concentrations of 100–500μg/m L for each *** all the lichen extracts showed complete mortality against *** in100μg/m L,the concentrations were decreased to 100,50,25,12.5,and 6.25μg/m L for *** mortality was observed for 24 h after ***：All the lichen extracts exhibited activity against third instar larvae of *** and *** at 100μg/m L,and 100%mortality was observed against the vector *** at 100μg/m *** highest larvicidal activity was found with *** against ***（81.127μg/m L）and ***（89.10μg/m L）.similarly,*** and *** when tested against *** with minimum concentration〈100μg/m L exhibited significant activity withof 5.32and 6.97μg/m ***：The bioassay results revealed larvicidal potential of lichens especially against *** with high mortality even at lower ***,lichens can be used as an ideal sustainable approach for the control of lymphatic filariasis caused by vector ***.

关键词： larvicidal lichen mortality mosquito vectors