National Academy Science Letters最新文献_第2页

Influence of Chemical Mutagen on Germinability, Growth and Biochemical Attributes of Dragon Fruit (Selenicereus undatus) 化学诱变剂对火龙果发芽、生长及生化特性的影响

IF 1.1 4区综合性期刊

National Academy Science Letters Pub Date : 2023-05-09 DOI: 10.1007/s40009-023-01259-2

Kuldeep K. Shukla, Kundan Kishore, Ankita Sahu, K. Pradhan, R. K. Nayak, S. N. Dash, Gautam Pratap Singh

引用次数: 0

A Compact Super Wideband Planar Monopole Antenna for Microwave Imaging Applications 一种用于微波成像的小型超宽带平面单极天线

IF 1.1 4区综合性期刊

National Academy Science Letters Pub Date : 2023-05-09 DOI: 10.1007/s40009-023-01256-5

Surajit Kundu

{"title":"A Compact Super Wideband Planar Monopole Antenna for Microwave Imaging Applications","authors":"Surajit Kundu","doi":"10.1007/s40009-023-01256-5","DOIUrl":"10.1007/s40009-023-01256-5","url":null,"abstract":"<div><p>In this work, a small planar super wideband monopole antenna of dimension 35 mm × 30 mm × 0.8 mm is designed to offer the 37.2 GHz bandwidth in the 2.8–40 GHz (14.28:1) frequency range. An extensive relative bandwidth that is greater than 173%, bandwidth to dimension ratio of 1904, highest gain of 6.1dBi and radiation efficiency almost equal to 80% are realized from this antenna. Several contemporary and futuristic wireless technologies such as commercial ultra-wideband (3.1–10.6 GHz), ISM bands (5.725–5.875 GHz, 24–24.25 GHz), WiMAX (3.3–3.8 GHz, 5.25–5.825 GHz), WLAN (5.15–5.35 GHz, 5.725–5.825 GHz), S(2–4 GHz)-C(4–8 GHz)-X(8–12 GHz)-Ku(12–18 GHz)-Ka(27–40 GHz) bands, and 5G NR bands (n77, n78, n79, n102, n104, n257, n258, n260, n261) are within the antenna’s spectrum range (2.8–40 GHz). The applicability of this bulb-alike antenna for microwave imaging is tested experimentally by studying the antenna’s impedance band, transfer function and group delay responses in vicinity of soil and wood exteriors of varying thicknesses. Moreover, C-scan result is incorporated for justifying the antenna’s applicability in microwave imaging application.\u0000</p></div>","PeriodicalId":717,"journal":{"name":"National Academy Science Letters","volume":"46 4","pages":"337 - 341"},"PeriodicalIF":1.1,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4399550","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

Frequency of Conjugal Transfer of Genes Between Non-pathogenic and Pathogenic Agrobacteria 非致病性和致病性农杆菌间基因的偶联转移频率

IF 1.1 4区综合性期刊

National Academy Science Letters Pub Date : 2023-05-09 DOI: 10.1007/s40009-023-01255-6

Aditi Sharma, A. K. Gupta

引用次数: 0

New Distributional Record of Mugilogobius Tigrinus Larson, 2001 and Mangarinus Waterousi Herre, 1943 (Gobiiformes: Gobiidae) From Indian Waters 印度水域Mugilogobius Tigrinus Larson, 2001和Mangarinus Waterousi Herre, 1943的分布新记录(虾蛄目:虾蛄科)

IF 1.1 4区综合性期刊

National Academy Science Letters Pub Date : 2023-04-09 DOI: 10.1007/s40009-023-01245-8

Moulitharan Nallathambi, Jayakumar Natarajan, Uma Arumugam, Baboonsundaram Ahilan

引用次数: 0

Antioxidant Properties and Polyphenolics of Berberis Lycium: An Unexplored Wild Edible Fruit Species of Himalaya 枸杞子的抗氧化特性和多酚类物质:一种未开发的喜马拉雅野生可食用水果

IF 1.1 4区综合性期刊

National Academy Science Letters Pub Date : 2023-04-08 DOI: 10.1007/s40009-023-01229-8

Arti Bisht, Amit Bahukhandi, Veena Pande, Indra D. Bhatt

{"title":"Antioxidant Properties and Polyphenolics of Berberis Lycium: An Unexplored Wild Edible Fruit Species of Himalaya","authors":"Arti Bisht, Amit Bahukhandi, Veena Pande, Indra D. Bhatt","doi":"10.1007/s40009-023-01229-8","DOIUrl":"10.1007/s40009-023-01229-8","url":null,"abstract":"<div><p><i>Berberis lycium</i> Royle. ex DC. (Family Berberidaceae) an important wild growing shrub of Western Himalaya. Berries of the species consumed by local people of the Himalaya, however, had limited information on their nutritional characteristics. In the present investigation, polyphenolic antioxidants of berries were assessed in different solvents. Results revealed that fresh berries were better for bioactive constituents (e.g., phenolics, tannins, flavonoids, flavonols and proanthocynidins) and antioxidant activities as compared to dried berries. However, a significant (<i>p</i> < 0.05) impact of solvent extraction system on polyphenolics and antioxidant activity was observed. Better results were obtained in solvents with medium polarity (acetone, methanol and ethanol). Results indicated that both fresh and dried berries are good sources of various health benefit compounds and should be further utilized for preparation of nutritious food stuffs that can contribute towards reducing the malnutrition in the region.\u0000</p></div>","PeriodicalId":717,"journal":{"name":"National Academy Science Letters","volume":"46 4","pages":"317 - 320"},"PeriodicalIF":1.1,"publicationDate":"2023-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40009-023-01229-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4324117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A New Root Endophytic Aquatic Hyphomycetes as an Addition to Indian Mycota: Pleuropedium tricladioides 印度真菌新发现的根内生水生丝孢菌:三叶侧柏

IF 1.1 4区综合性期刊

National Academy Science Letters Pub Date : 2023-04-07 DOI: 10.1007/s40009-023-01244-9

Anjali Koranga, S. C. Sati

引用次数: 0

Microplastics Alter Dehydrogenase, Urease, and Cellulase Activities in Soil 微塑料改变土壤中脱氢酶、脲酶和纤维素酶的活性

IF 1.1 4区综合性期刊

National Academy Science Letters Pub Date : 2023-04-07 DOI: 10.1007/s40009-023-01246-7

R. Santhosh Kumar, A. Merline Sheela

{"title":"Microplastics Alter Dehydrogenase, Urease, and Cellulase Activities in Soil","authors":"R. Santhosh Kumar, A. Merline Sheela","doi":"10.1007/s40009-023-01246-7","DOIUrl":"10.1007/s40009-023-01246-7","url":null,"abstract":"<div><p>Microplastic (MP) pollution poses a serious threat to soil ecosystems. Recent studies have observed that MPs may have adverse effects on soil flora and fauna. The studies conducted to observe the effect of MPs on microbial enzymes in soil were limited. Therefore, the present study was conducted to examine the impact of MPs, namely low-density polyethylene microplastics (LDPEMP), polystyrene microplastics (PSMP), and nylon microplastics (Nylon MP), on enzymes such as dehydrogenase, urease, and cellulose. The LDPEMPs increased the dehydrogenase enzyme activity at various concentrations, ranging from 0 to 5%. On the 60th day, the dehydrogenase activity was found to be 52.7 ± 0.8 g triphenyl formazon formed g soil<sup>−1</sup> day<sup>−1</sup> at 5% LDPEMP concentration. The urease activity on the 60th day was 0.59 ± 0.04, 0.15 ± 0.02, 0.13 ± 0.02, and 0.08 ± 0.01 mg NH<sub>3</sub>–N g soil<sup>−1</sup> at 0%, 1%, and 5%, respectively. Further, cellulase activity was reduced at 3% and 5% LDPEMP concentrations. At 1% and 3% concentrations, PSMPs increased cellulase activity. However, at 1%, 3%, and 5% concentrations, nylonMPs reduced cellulase activity. This study found that MPs in soil affect the extracellular enzymes produced by microorganisms in the soil, which may influence mineralization.\u0000</p></div>","PeriodicalId":717,"journal":{"name":"National Academy Science Letters","volume":"46 4","pages":"325 - 328"},"PeriodicalIF":1.1,"publicationDate":"2023-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4281937","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: 1

A Rare Cleptoparasitic Bee Tetralonioidella himalayana (Bingham, 1897) (Hymenoptera: Apidae) from India: Review and New Data 印度一种罕见的喜马拉雅四爪蜂(Bingham, 1897)(膜翅目:蜂科):综述与新资料

IF 1.1 4区综合性期刊

National Academy Science Letters Pub Date : 2023-04-04 DOI: 10.1007/s40009-023-01243-w

Dibyajyoti Ghosh, P. Girish Kumar, K. A. Subramanian

{"title":"A Rare Cleptoparasitic Bee Tetralonioidella himalayana (Bingham, 1897) (Hymenoptera: Apidae) from India: Review and New Data","authors":"Dibyajyoti Ghosh, P. Girish Kumar, K. A. Subramanian","doi":"10.1007/s40009-023-01243-w","DOIUrl":"10.1007/s40009-023-01243-w","url":null,"abstract":"<div><p><i>Tetralonioidella</i> Strand 1914 is a very rare apid genus globally, of which only two species, <i>Tetralonioidella himalayana</i> (Bingham, 1897) and <i>Tetralonioidella tricolor</i> (Lieftinck, 1972), are known from India. They are known to be cleptoparasitic on species of <i>Habropoda</i> Smith, 1854 and <i>Elaphropoda</i> Lieftinck, 1966. During hymenopteran survey in Arunachal Pradesh, we encountered <i>Tetralonioidella himalayana</i> (Bingham, 1897) and observed their behavioral regime, which is very poorly known. The identifying characteristics of both male and female, their foraging behavior, floral preference, distribution pattern, and possible host association have been studied. Exclusive floral association and host specialization are potential contributing factors to the rarity of <i>T. himalayana</i>. Such factors may limit the distribution range of the species. A priori sampling resolution with genetic and demographic exploration is required to evaluate the present status of such bee species.</p></div>","PeriodicalId":717,"journal":{"name":"National Academy Science Letters","volume":"46 4","pages":"289 - 294"},"PeriodicalIF":1.1,"publicationDate":"2023-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40009-023-01243-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4149257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Serpentine Layering as an Efficient Means of Propagation in Woody Pepper (Piper pendulispicum C.DC.): A Novel Spice from Andaman Islands 安达曼群岛的一种新香料——胡椒粉(Piper pendulispicum C.DC.)的蛇形层状繁殖方式

IF 1.1 4区综合性期刊

National Academy Science Letters Pub Date : 2023-03-31 DOI: 10.1007/s40009-023-01239-6

Ajit Arun Waman, Pooja Bohra, Karthika Devi Ravi

引用次数: 0

Screening of Nutrients for Enrichment of Extracellular Pullulanase Production by Isolated Bacillus cereus KKSJ1981 Using Plackett–Burman Design 用Plackett-Burman设计筛选蜡样芽孢杆菌KKSJ1981胞外普鲁兰酶生产富集的营养物质

IF 1.1 4区综合性期刊

National Academy Science Letters Pub Date : 2023-03-27 DOI: 10.1007/s40009-023-01241-y

Jonna Siva Jyothi, Emandi Hemalatha, Tadikamalla Satish, Kadimpati Kishore Kumar

{"title":"Screening of Nutrients for Enrichment of Extracellular Pullulanase Production by Isolated Bacillus cereus KKSJ1981 Using Plackett–Burman Design","authors":"Jonna Siva Jyothi, Emandi Hemalatha, Tadikamalla Satish, Kadimpati Kishore Kumar","doi":"10.1007/s40009-023-01241-y","DOIUrl":"10.1007/s40009-023-01241-y","url":null,"abstract":"<div><p>Current work intended to screen the different carbon, nitrogen sources and minerals which have a significant impact on the production of pullulanase by isolated <i>Bacillus cereus</i> KKSJ 1981 using Plackett–Burman design (PBD). Total 11 compounds (5 carbon sources, 3 nitrogen sources and 3 mineral salts) were screened by using 16 runs PBD. Each variable studied at 3 levels. The data were analyzed by first-order polynomial equation. The correlation coefficient was found to be 0.9876 and indicates the goodness of fit. Pareto chart of effects, normal probability plot and main effects plots were used to identify the significant variables and their level. It was observed that monosaccharide’s and dextran were found to be insignificant and remaining all variables found to be significant for production of pullulanase by isolated bacteria. Among all significant variables yeast extract has highest effect followed by soluble starch and MnSO<sub>4</sub>. This study reveals that yeast extract at low concentration, soluble starch and MnSO<sub>4</sub> at higher level needed for the high titer of pullulanase production from <i>B.cereus</i> KKSJ 1981.</p></div>","PeriodicalId":717,"journal":{"name":"National Academy Science Letters","volume":"46 3","pages":"233 - 238"},"PeriodicalIF":1.1,"publicationDate":"2023-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5049380","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