National Academy Science Letters最新文献_第2页

Climate-Induced Pandemics in the Plastisphere

IF 1.2 4区综合性期刊

National Academy Science Letters Pub Date : 2024-09-23 DOI: 10.1007/s40009-024-01439-8

Sung Hee Joo

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Hypoestes phyllostachya Baker: A New Record of Invasive Alien Plant Species from Uttarakhand, India Hypoestes phyllostachya Baker：印度北阿坎德邦外来入侵植物物种新记录

IF 0.788 4区综合性期刊

National Academy Science Letters Pub Date : 2024-09-19 DOI: 10.1007/s40009-024-01466-5

Puneet Kumar, Poulami Ghosh, Purushottam Kumar Deroliya, Sushil Kumar Singh

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On the Modeling of Two Covid-19 Data Sets Using a Generalized Log-Exponential Transformed Distribution 论使用广义对数指数变换分布对两个 Covid-19 数据集建模

IF 0.788 4区综合性期刊

National Academy Science Letters Pub Date : 2024-09-19 DOI: 10.1007/s40009-024-01458-5

Idika E. Okorie, Saralees Nadarajah

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Comparison of Different Signal Peptide Targeting EGFP Translocation Periplasm in Salmonella 比较沙门氏菌中靶向 EGFP 易位包膜的不同信号肽

IF 0.788 4区综合性期刊

National Academy Science Letters Pub Date : 2024-09-19 DOI: 10.1007/s40009-024-01454-9

Jiaxue Yang, Shangjun Xie, Yalan Zhu, Chubin Fang, Chuan Wang, Tian Tang

{"title":"Comparison of Different Signal Peptide Targeting EGFP Translocation Periplasm in Salmonella","authors":"Jiaxue Yang, Shangjun Xie, Yalan Zhu, Chubin Fang, Chuan Wang, Tian Tang","doi":"10.1007/s40009-024-01454-9","DOIUrl":"https://doi.org/10.1007/s40009-024-01454-9","url":null,"abstract":"The signal peptide sequence of Salmonella OsmY and OmpA proteins as well as beta-lactamase (Bla) was synthesized and cloned into the Nco I/Nde I site of plasmid pET28a-EGFP, resulting in the construction of plasmid pET28a-OsmY-EGFP, pET28a-OmpA-EGFP, and pET28a-Bla-EGFP, respectively. Followed by transfermation into the wild-type Salmonella strain TT-1, the signal peptide fused EGFP were expressed in the presence of 0.5% isopropyl β-D-thiogalactopyranoside (IPTG). The localization of EGFP in Salmonella was determined by periplasmic protein quantification, fluorescence microscopy and the measurement of fluorescence intensity. The signal peptide of OsmY, OmpA or Bla not only direct EGFP to the periplasm of Salmonella but also kept its activity. Amongest the three peptides, the signal peptide of OsmY was the most efficient, resulting in the highest level of EGFP in the periplasmic space of Salmonella. In the present study, we assessed the efficacy of the signal peptide of OsmY, OmpA or Bla in directing the EGFP to the periplasm of Salmonella. We suggested that the Sec pathway of Salmonella is capable of exporting heterologous proteins in an active form, and the signal peptide of OsmY could deliver EGFP to the periplasm of Salmonella effectively.","PeriodicalId":717,"journal":{"name":"National Academy Science Letters","volume":"31 1","pages":""},"PeriodicalIF":0.788,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142265044","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

First Karyotypic Record of Freshwater Crab, Himalayapotamon emphysetum (Decapoda: Potamidae) from Jammu and Kashmir, India

IF 1.2 4区综合性期刊

National Academy Science Letters Pub Date : 2024-09-19 DOI: 10.1007/s40009-024-01438-9

Menakshi Dhar, Seema Langer

{"title":"First Karyotypic Record of Freshwater Crab, Himalayapotamon emphysetum (Decapoda: Potamidae) from Jammu and Kashmir, India","authors":"Menakshi Dhar, Seema Langer","doi":"10.1007/s40009-024-01438-9","DOIUrl":"10.1007/s40009-024-01438-9","url":null,"abstract":"<div>The science of cytogenetics deals with the structure and behavior of chromosomes during the mitotic and meiotic division of cells. Chromosomal studies have received significant attention over the past few years, especially in the disciplines of Karyology and Cytogenetics. Animal species provide a vital contribution to the knowledge of chromosome evolution. The species studied during the present investigation possessed 2n = 74 chromosomes and the karyotypic formula of Himalayapotamon emphysetum was found to be 2n = 46 m + 10sm + 6st + 12t. Meiosis was observed to be normal and thirty-seven bivalents in the form of rings were observed during diakinesis. The individual chromosomes in the Karyotype were identified by using NOR-banding method. The data generated during the present study adds great knowledge to the karyosystematics of the crab species and will help understand interrelationships among the different crab species and also aids in undertaking hybridization programmes. Data related to the karyotypic features is considered a pre-requisite for genomic studies.</div>","PeriodicalId":717,"journal":{"name":"National Academy Science Letters","volume":"48 1","pages":"21 - 25"},"PeriodicalIF":1.2,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423426","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

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 0.788 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":"https://doi.org/10.1007/s40009-024-01449-6","url":null,"abstract":"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.","PeriodicalId":717,"journal":{"name":"National Academy Science Letters","volume":"33 1","pages":""},"PeriodicalIF":0.788,"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}

引用次数: 0

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

引用次数: 0

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}

引用次数: 0

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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