National Academy Science Letters最新文献_第9页

Bacterial Wilt Caused by Ralstonia solanacearum: A Potential Threat to Brinjal Cultivated in Sikkim, India Ralstonia solanacearum 引起的细菌枯萎病：对印度锡金种植的 Brinjal 的潜在威胁

IF 1.2 4区综合性期刊

National Academy Science Letters Pub Date : 2024-09-18 DOI: 10.1007/s40009-024-01449-6

Bahadur Singh Bamaniya, Twarita Das, Tshering Lhamu Sherpa, Kime Tare, Manju Rana, Niladri Bag

{"title":"Bacterial Wilt Caused by Ralstonia solanacearum: A Potential Threat to Brinjal Cultivated in Sikkim, India","authors":"Bahadur Singh Bamaniya, Twarita Das, Tshering Lhamu Sherpa, Kime Tare, Manju Rana, Niladri Bag","doi":"10.1007/s40009-024-01449-6","DOIUrl":"10.1007/s40009-024-01449-6","url":null,"abstract":"<div>Bacterial wilt caused by Rolstonia solanacearum is one of the devastating soil-borne disease that leads to death of numerous crops worldwide. In this study bacterial wilt of brinjal (Solanum melongena L.) those are cultivated in Sikkim, India was identified based on the wilting symptoms of plants and ooze test. Pathogen was isolated following incubated stem segments of the wilted plants on the Casmino acid, Peptone, Glucose Agar (CPGA) medium. Morphological, biochemical and microscopic observations confirmed the isolates as R. solanacearum, race 1, biovar -3, and phylotypes I (Asiaticum). Molecular identification by using the R. solanacearum species-specific (RSSS) primers (759R and 760F) consisting small subunit region of rRNA gene with 282 bp amplicon confirmed the pathogen as R. solanacearum. The 16S rRNA sequence data was subjected to BLASTn in the NCBI database showed 98% similarity to R. solanacearum with accession number OM044161, and OM666560. To the best of our knowledge this is the first report of the occurrence of R. solanacearum pathogen causing bacterial wilt in brinjal cultivated in organic Sikkim.</div>","PeriodicalId":717,"journal":{"name":"National Academy Science Letters","volume":"48 2","pages":"213 - 216"},"PeriodicalIF":1.2,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142265041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Bistorta coriacea (Sam.) Yonek. & H.Ohashi (Polygonaceae): An Addition to the Angiospermic Flora of India Bistorta coriacea (Sam.) Yonek：印度 Angiospermic 植物区系的新成员

IF 1.2 4区综合性期刊

National Academy Science Letters Pub Date : 2024-09-18 DOI: 10.1007/s40009-024-01436-x

Sunit Singh, J. P. Mehta, Anant Kumar

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Hippophae rhamnoides subsp. turkestanica: A Potential Species for Sustainable Propagation in the Cold Desert of Ladakh Hippophae rhamnoides subsp：拉达克寒冷沙漠中可持续繁殖的潜在物种

IF 1.2 4区综合性期刊

National Academy Science Letters Pub Date : 2024-09-17 DOI: 10.1007/s40009-024-01431-2

Sonam Tamchos, Konchok Dorjey

{"title":"Hippophae rhamnoides subsp. turkestanica: A Potential Species for Sustainable Propagation in the Cold Desert of Ladakh","authors":"Sonam Tamchos, Konchok Dorjey","doi":"10.1007/s40009-024-01431-2","DOIUrl":"10.1007/s40009-024-01431-2","url":null,"abstract":"<div>This communication highlights the ecological, medicinal, and socio-economical significance of the Hippophae rhamnoides subsp. turkestanica Rousi, commonly known as seabuckthorn, advocating its potential for commercial propagation in the cold desert of Ladakh. The plant is a multipurpose taxon with several health-promoting medicinal and nutritional properties, and ecological and economical values which makes it a plant of interest for researchers, farmers, and pharmaceutical industries. Seabuckthorn has ecological distribution in various regions of Indian subcontinent including Ladakh, Himachal Pradesh, Uttarakhand, Sikkim and Arunachal Pradesh, with profound abundance in the Union Territory of Ladakh. Nevertheless, despite being a potential economical herb with immense adaptation to the cold desert environment of Ladakh, seabuckthorn has been given meager attention by the local populace to propagate and commercially use for health and economy. Therefore, this article highlights the potentialities and opportunities to commercially propagate seabuckthorn through mega-plantation projects for the sustainable ecological and economic development of Ladakh and other Trans-Himalayan regions.</div>","PeriodicalId":717,"journal":{"name":"National Academy Science Letters","volume":"48 1","pages":"89 - 94"},"PeriodicalIF":1.2,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142265042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On sufficient condition for t-toughness of a graph in terms of eccentricity-based indices 基于偏心指数的图的 t-韧度的充分条件

IF 1.2 4区综合性期刊

National Academy Science Letters Pub Date : 2024-09-16 DOI: 10.1007/s40009-024-01437-w

Rajkaran Kori, Abhyendra Prasad, Ashish K. Upadhyay

{"title":"On sufficient condition for t-toughness of a graph in terms of eccentricity-based indices","authors":"Rajkaran Kori, Abhyendra Prasad, Ashish K. Upadhyay","doi":"10.1007/s40009-024-01437-w","DOIUrl":"10.1007/s40009-024-01437-w","url":null,"abstract":"<div>Let (omega (G)) be the number of components of graph G. For (tgeqslant 0) we call G t-tough if (tcdot omega (G-X)leqslant |X|), for every (Xsubseteq V(G)) with (omega (G-X)geqslant 2). (1-)tough graphs are also called Hamiltonian graphs. The eccentric connectivity index of a connected graph G denoted by (xi ^c(G)), is defined as (xi ^c(G) = sum _{v in V(G)} epsilon ({v}) d(v)). The eccentric distance sum of a connected graph G is denoted by (xi ^d(G)), is defined as (xi ^d(G) = sum _{v in V(G)} epsilon (v) D(v)). The connective eccentricity index of a connected graph G denoted as (xi ^{ce}(G)), is defined as (xi ^{ce}(G) = sum _{v in V(G)} frac{d(v)}{epsilon (v)}), where (epsilon (v)) is the eccentricity of the vertex v, D(v) is the sum of the distance from to all other vertices, and d(v) is the degree of vertex v. Finding sufficient conditions for a graph to possess certain properties is a meaningful and important problem. In this article, we give sufficient conditions for t-toughness graphs in terms of the eccentric connectivity index, eccentric distance sum, and connective eccentricity index.</div>","PeriodicalId":717,"journal":{"name":"National Academy Science Letters","volume":"48 1","pages":"73 - 78"},"PeriodicalIF":1.2,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142265043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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2023 IUFRO-Division 5 Conference: Natural and Plantation Forest Timber Research Advances 2023 年国际林研联第 5 分部会议：天然林和人工林木材研究进展

IF 1.2 4区综合性期刊

National Academy Science Letters Pub Date : 2024-09-12 DOI: 10.1007/s40009-024-01435-y

Maneesh S. Bhandari, Shailesh Pandey, Rajendra K. Meena, Andrew Lowe

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New Records of Arthoniales (Ascomycetous Fungi) From India 印度新记录的 Arthoniales（子囊菌类真菌

IF 1.2 4区综合性期刊

National Academy Science Letters Pub Date : 2024-09-12 DOI: 10.1007/s40009-024-01443-y

Komal Kumar Ingle, Siljo Joseph, Sanjeeva Nayaka, Dalip Kumar Upreti

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Quality Assessment of Gloriosa superba L. Tuber Natural Populations of Telangana, India Based on Physico-Chemical Screening and Colchicine Quantification 基于理化筛选和秋水仙碱定量的印度特兰甘纳邦 Gloriosa superba L. Tuber 天然种群质量评估

IF 1.2 4区综合性期刊

National Academy Science Letters Pub Date : 2024-09-11 DOI: 10.1007/s40009-024-01421-4

Pankaj Singh, Gananadhamu Samanthula, J. Mary Chandana, Roshitha K. Ramachandran, Kodam Chandraprakash, Pravin H. Chawhaan, Swapnendu Pattanaik

{"title":"Quality Assessment of Gloriosa superba L. Tuber Natural Populations of Telangana, India Based on Physico-Chemical Screening and Colchicine Quantification","authors":"Pankaj Singh, Gananadhamu Samanthula, J. Mary Chandana, Roshitha K. Ramachandran, Kodam Chandraprakash, Pravin H. Chawhaan, Swapnendu Pattanaik","doi":"10.1007/s40009-024-01421-4","DOIUrl":"10.1007/s40009-024-01421-4","url":null,"abstract":"<div>Gloriosa superba L. tuber, a source of colchicine, is widely used in Ayurveda for treatment of various diseases. Survey of the medicinal plant, having desired metabolite content, from natural forests is crucial for production of quality planting material. Quality assessment of the natural populations are important to control the quality, authencity and purity of the medicinal plants. The present study aimed to assess the quality and quantity of colchicine in the sixteen natural populations of Telangana G. superba (TGS) tubers. All the tubers qualified the physicochemical properties viz. Total Ash (2.4 to 4.8%), Acid Insoluble Ash (0.12 to 0.54%), Foreign Matter (0.10 to 0.46%), Water Soluble Extractive (15.16 to 22.91%) and Alcohol Soluble Extractive (6.08 to 22.13%) as per Ayurveda Pharmacopeia of India which proved the authenticity and quality of the tubers for use in various formulations. A dveloped HPLC method has been validated for linearity, limit of quantification, limit of detection, accuracy, precision and robustness for quantification of colchicine in tuber which revealed that the colchicine content significantly (P ˂ 0.05)varied from 0.03 to 0.55% in tubers on dry weight basis. Significant correlations (P ˂ 0.05) have also been found between physicochemical and colchicine content of the screened populations. Out of sixteen populations of TGS, three natural populations (TGS14, TGS04 and TGS08) are found promising, based on rich colchicine content, for future conservation as well as commercial cultivation programme.</div>","PeriodicalId":717,"journal":{"name":"National Academy Science Letters","volume":"48 1","pages":"83 - 87"},"PeriodicalIF":1.2,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142181891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Analysis of 3D-Printed Nylon/PETG Hybrid Polymer Laminate Plate for Wind Turbine Nacelle Application 三维打印尼龙/PETG 混合聚合物层压板在风力涡轮机机舱中的应用分析

IF 1.2 4区综合性期刊

National Academy Science Letters Pub Date : 2024-09-11 DOI: 10.1007/s40009-024-01422-3

S. Senthil Murugan, E. Shankar, Subhaschandra Kattimani, V. R. Abish, G. Anbu, A. R. Avinash

{"title":"Analysis of 3D-Printed Nylon/PETG Hybrid Polymer Laminate Plate for Wind Turbine Nacelle Application","authors":"S. Senthil Murugan, E. Shankar, Subhaschandra Kattimani, V. R. Abish, G. Anbu, A. R. Avinash","doi":"10.1007/s40009-024-01422-3","DOIUrl":"10.1007/s40009-024-01422-3","url":null,"abstract":"<div>This study aims to develop hybrid polymer laminate (HPL) structure utilizing the 3D printing fused filament fabrication (FFF) method and analyze the printing process. The HPL plates were fabricated using PETG and nylon 66 thermoplastic polymers at varying infill densities, printing speeds, and layer thicknesses. The experimental setup followed a fixed matrix based on the L9 orthogonal array (OA). Each HPL consisted of a bottom layer printed with nylon 66, with PETG layers sandwiched on top. Subsequently, the samples underwent testing using a UTM m/c to assess their tensile and flexural strength, as well as printing efficiency. Warping was observed on the printed samples, with a maximum tensile strength of 27 MPa and flexural strength of 14.5 MPa recorded. Notably, different strength values were observed when altering printing parameters. While the printing process was successful, the resulting HPL exhibited slightly lower strength compared to PETG or nylon 66 filaments. The study achieved a maximum printing efficiency of 90% (η), with the layer thickness parameter significantly impacting tensile properties. These findings offer valuable insights and required for various industrial applications, including wind turbines, electronics, automotive, and aeronautics.</div>","PeriodicalId":717,"journal":{"name":"National Academy Science Letters","volume":"48 1","pages":"33 - 38"},"PeriodicalIF":1.2,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142181887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Shape and Size Dependent Behaviour of Melting Temperature for Nanoparticles 纳米颗粒熔化温度随形状和尺寸变化的行为

IF 1.2 4区综合性期刊

National Academy Science Letters Pub Date : 2024-09-06 DOI: 10.1007/s40009-024-01430-3

Shivam Srivastava, Anjani K. Pandey, Chandra K. Dixit

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Wavelet Transform Associated with Quadratic-Phase Hankel Transform 与二次相汉克尔变换相关的小波变换

IF 1.2 4区综合性期刊

National Academy Science Letters Pub Date : 2024-09-02 DOI: 10.1007/s40009-024-01423-2

Chandra Roy, Tanuj Kumar, Akhilesh Prasad, Govind Kumar Jha

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