National Academy Science Letters最新文献_第8页

On the Recycled Acrylonitrile Butadiene Styrene Composite Filaments with Tuneable Thermo-Mechanical Properties 热机械性能可调的再生丙烯腈-丁二烯-苯乙烯复合长丝的研究

IF 1.2 4区综合性期刊

National Academy Science Letters Pub Date : 2024-09-23 DOI: 10.1007/s40009-024-01433-0

Ranvijay Kumar, Rupinder Singh, Nishant Ranjan, Vinay Kumar

{"title":"On the Recycled Acrylonitrile Butadiene Styrene Composite Filaments with Tuneable Thermo-Mechanical Properties","authors":"Ranvijay Kumar, Rupinder Singh, Nishant Ranjan, Vinay Kumar","doi":"10.1007/s40009-024-01433-0","DOIUrl":"10.1007/s40009-024-01433-0","url":null,"abstract":"<div><p>In the past two decades, several studies have been reported on the 3D printing of acrylonitrile butadiene styrene (ABS) based functional prototypes (of amorphous nature) using the fused filament fabrication (FFF) process. It has been reported that the reinforcements (commercial metallic powders) result in the tuned crystalline behaviour of the ABS matrix, leading to compromised 3D printing capabilities. This study highlights the fabrication of secondary (2°) recycled ABS filament with reinforcement of burnt incense stick powder waste (ISPW) for acceptable thermo-mechanical properties and 3D printing capabilities. The reinforcement of ISPW (0.75% by wt.) in ABS was selected based on the rheological and mechanical properties. The X-ray diffraction (XRD) results show an improvement in crystallinity (from 28.5 to 34.9%) with a minor change in mechanical strength (from 29.8 MPa to 29.47 MPa) in the ABS-0.75%ISPW composite. The differential scanning calorimetry (DSC) analysis outlined that glass transition temperature (Tg) was improved (from 94.97 °C to 105.27 °C) for the prepared composite. The results were also validated through Fourier-transform infrared spectroscopy (FTIR) analysis.</p></div>","PeriodicalId":717,"journal":{"name":"National Academy Science Letters","volume":"48 1","pages":"51 - 54"},"PeriodicalIF":1.2,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423189","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

Climate-Induced Pandemics in the Plastisphere 气候引起的塑料圈大流行

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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Enhancing GaN LED Efficiency with Advanced Quantum Well Structure 利用先进量子阱结构提高GaN LED效率

IF 1.2 4区综合性期刊

National Academy Science Letters Pub Date : 2024-09-20 DOI: 10.1007/s40009-024-01457-6

Shahzaib Aftab, Shabbir Majeed Chaudhry

引用次数: 0

Livestock Depredation Pattern by Common Leopard: A Case Study from Great Himalayan National Park Conservation Area 普通豹对牲畜的捕食模式——以大喜马拉雅国家公园保护区为例

IF 1.3 4区综合性期刊

National Academy Science Letters Pub Date : 2024-09-19 DOI: 10.1007/s40009-024-01470-9

Suneet Bhardwaj, Suveena Thakur, Amar Paul Singh, Kritish De

{"title":"Livestock Depredation Pattern by Common Leopard: A Case Study from Great Himalayan National Park Conservation Area","authors":"Suneet Bhardwaj, Suveena Thakur, Amar Paul Singh, Kritish De","doi":"10.1007/s40009-024-01470-9","DOIUrl":"10.1007/s40009-024-01470-9","url":null,"abstract":"<div><p>In the Himalayan region of India, conflicts between humans and big cats, particularly common leopards and snow leopards, are an age-old saga. In this study, we used forest department data on compensation to farmers who suffered livestock losses due to leopard attacks in the Great Himalayan National Park Conservation Area to unravel the patterns of livestock depredation, offering a deeper understanding of this enduring and complex human-wildlife dynamic. We found that the intensity of livestock depredation by common leopards varies with the seasons, surging during the pre-monsoon and winter months and spiking during natural calamities. Interestingly, they show a preference for smaller prey over medium and large-sized preys. Yet, amid these seasonal and situational peaks, the overall intensity of livestock depredation by common leopards has been on a decline in recent years. While conflicts in the region appear to be diminishing, it is crucial to reduce villagers' dependence on forests, and alternative livelihood options should be adopted. Both government and non-government organizations can play a pivotal role in mitigating these conflicts and promote harmonious coexistence.</p></div>","PeriodicalId":717,"journal":{"name":"National Academy Science Letters","volume":"48 3","pages":"373 - 377"},"PeriodicalIF":1.3,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167397","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

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 1.2 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

引用次数: 0

First Record and Range Extension of a Golden Mantis Shrimp (Order: Stomatopoda, Family: Lysiosquillidae) from the Seagrass Meadows of the Haripur Creek-Gopalpur, Odisha Coast, India 印度奥里萨邦海岸哈里普尔河-戈帕尔普尔海草草甸金螳螂虾（目：口足目，科：金螳螂科）的首次记录和范围扩展

IF 1.3 4区综合性期刊

National Academy Science Letters Pub Date : 2024-09-19 DOI: 10.1007/s40009-024-01469-2

Debasish Mahapatro, Sangeeta Mishra, Rajaram Behera, Sharada Shrinivas Pati, Satyabrata Das Sharma, Niranjan Mallick, Kailasam Murugesan

{"title":"First Record and Range Extension of a Golden Mantis Shrimp (Order: Stomatopoda, Family: Lysiosquillidae) from the Seagrass Meadows of the Haripur Creek-Gopalpur, Odisha Coast, India","authors":"Debasish Mahapatro, Sangeeta Mishra, Rajaram Behera, Sharada Shrinivas Pati, Satyabrata Das Sharma, Niranjan Mallick, Kailasam Murugesan","doi":"10.1007/s40009-024-01469-2","DOIUrl":"10.1007/s40009-024-01469-2","url":null,"abstract":"<div><p>Present study provides first live occurrence of a mantis shrimp <i>Lysiosquilla tredecimdentata</i> Holthuis, 1941 (Total length—238 mm and Total wet weight—110 g) from the intertidal sea grass bed of Haripur creek (19°15′ 45″ N and 84°54′ 52″ E) of Gopalpur-on-sea, Odisha coast being noticed on 21st June 2022. This study reports about the <i>Lysiosquilla tredecimdentata</i> range extension from Andhra Pradesh in south and West Bengal in north to Odisha coast of India. Although the creek ecosystem is not completely free from the impact of pollution stress and natural calamities such as tropical cyclone, the factors responsible for such occurrence have not been identified yet. Conversely, habitat suitability and availability of preferred food substance due to the newly formed sea grass meadow might have supported such type of stomatopod species for migrating towards the creek waters. Indeed, this record has increased the Odisha coast’s stomatopod species diversity to fifteen.</p></div>","PeriodicalId":717,"journal":{"name":"National Academy Science Letters","volume":"48 3","pages":"367 - 371"},"PeriodicalIF":1.3,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167396","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 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 1.3 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

引用次数: 0

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 1.3 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":"10.1007/s40009-024-01454-9","url":null,"abstract":"<div><p>The signal peptide sequence of <i>Salmonella</i> 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 <i>Salmonella</i> 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 <i>Salmonella</i> 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 <i>Salmonella</i> 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 <i>Salmonella</i>. 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 <i>Salmonella</i>. We suggested that the Sec pathway of <i>Salmonella</i> is capable of exporting heterologous proteins in an active form, and the signal peptide of OsmY could deliver EGFP to the periplasm of <i>Salmonella</i> effectively.</p></div>","PeriodicalId":717,"journal":{"name":"National Academy Science Letters","volume":"48 3","pages":"297 - 301"},"PeriodicalIF":1.3,"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

Comparative Performance Analysis on WEDM Responses for Titanium Matrix Composite Using Novel Multi-objective Optimization Algorithms 基于新型多目标优化算法的钛基复合材料线切割响应性能对比分析

IF 1.2 4区综合性期刊

National Academy Science Letters Pub Date : 2024-09-19 DOI: 10.1007/s40009-024-01463-8

Soutrik Bose

{"title":"Comparative Performance Analysis on WEDM Responses for Titanium Matrix Composite Using Novel Multi-objective Optimization Algorithms","authors":"Soutrik Bose","doi":"10.1007/s40009-024-01463-8","DOIUrl":"10.1007/s40009-024-01463-8","url":null,"abstract":"<div><p>A comparative performance analysis has been investigated on wire-cut electrical discharge machining (WEDM) responses while machining a hybrid titanium matrix composite (TMC) varying the key input parameters like power (P), peak current (IP) and time-off (Toff). Two novel multi-objective optimization algorithms are developed namely desirable multi-objective genetic algorithm (DMOGA) and desirable particle swarm optimization (DPSO). The principal advantage of DMOGA to other algorithm is accuracy and robustness. The novelty fits in the iterative progression of growth of efficient grandee set, uttered as population congregating to a fitness function. DPSO is an enthralling computational method depending on the social behavior of birds and fish where ‘swarm’ of potential solutions termed as particles explores the problem in space for obtaining the multi-objective optimization (MOO) solution where the desirable objective function is fetched in python using PSO. Experimental investigation is accepted on material removal rate (MRR), surface roughness (SR), kerf width (KW) and over cut (OC). Combined desirability in case of DMOGA is 0.716 which improved to 0.813 when DPSO is proposed. MOO is improved with DPSO of 13.547% when contrasted with DMOGA, with MRR of 3.81 mm<sup>3</sup>/min, SR of 0.79 µm, KW of 0.349 mm, OC of 0.099 mm and combined desirability of 0.813. Improved optimality set is obtained when DPSO is used. %improvement of MRR is 5.54%, SR is 75.95%, KW is 0.29% and OC is 4.21%.</p></div>","PeriodicalId":717,"journal":{"name":"National Academy Science Letters","volume":"48 2","pages":"251 - 257"},"PeriodicalIF":1.2,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143856505","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 印度查谟和克什米尔淡水蟹喜马拉雅蟹（十足目：野生蟹科）的第一个核型记录

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><p>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 <i>Himalayapotamon emphysetum</i> 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.</p></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