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- Anita Pandey
- Priyanka Sati
- Mukesh K. Malviya
- Shipra Singh
- S. Mitra
- Himangshu Paul
- Shashwat K. Singh
- Siddharth Dey
- Debarchan Powali
- D. M. Pandey
- Thomson Abraham
- Jacob Mathew
- P. Jyothsna
- Padma Ramachandran
- V. G. Malathi
- Ashim Jana
- B. C. Sarkar
- Suresh Kumar
- G. S. Yadav
- Pramod Kumar
- Deepak Chowrasia
- Nisha Sharma
- Vinod Dohrey
- Md. Arshad
- Asif Jafri
- Juhi Rais
- Madhu Gupta
- Sahabjada
- Smarika Kulshrestha
- RAAJ Ramsankaran
- Manohar Arora
- A. R. Senthil Kumar
- Randhir Singh
- Parveen Kumar Lehana
- Natasha Singh
- Saurabh Narang
- Deepak Kumar
- Md Arshad
- Sahabjada Siddiqui
- Juhi Rahis
- Suday Prasad
- Raj K. Sah
- Chandra S. Prabhakar
- Ankur Jyoti Saikia
- Prosanta Hazarika
- Aniket Verma
- Amar Prakash
- Sandip Oraon
- Sujit Kumar Mandal
Journals
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Kumar, Ajay
- Use of Endophytic Bacterium (Pseudomonas Sp., MTCC9476) in Propagation and Conservation of Ginkgo biloba L.: a Living Fossil
Abstract Views :288 |
PDF Views:83
Authors
Affiliations
1 Biotechnological Applications, G.B. Pant Institute of Himalayan Environment and Development, Kosi-Katarmal, Almora 263 643, IN
1 Biotechnological Applications, G.B. Pant Institute of Himalayan Environment and Development, Kosi-Katarmal, Almora 263 643, IN
Source
Current Science, Vol 106, No 8 (2014), Pagination: 1066-1067Abstract
No Abstract.Full Text
- The 25 April 2015 Nepal Earthquake and its Aftershocks
Abstract Views :223 |
PDF Views:85
Authors
S. Mitra
1,
Himangshu Paul
1,
Ajay Kumar
1,
Shashwat K. Singh
1,
Siddharth Dey
1,
Debarchan Powali
1
Affiliations
1 Department of Earth Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741 246, IN
1 Department of Earth Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741 246, IN
Source
Current Science, Vol 108, No 10 (2015), Pagination: 1938-1943Abstract
The massive Mw = 7.8 earthquake which rocked the Nepal Himalaya on 25 April 2015 is the largest to have occurred in this region in the past 81 years. This event occurred by slip on a ~150 km long and 55 km wide, shallow dipping (~5°) segment of the Main Himalayan Thrust (MHT), causing the Himalaya to lurch southwestward by 4.8 ± 1.2 m over the Indian plate. The main shock ruptured the frictionally locked segment of the MHT, initiating near the locking line and rupturing all the way updip close to its surface expression near the foothills of the Himalaya. The main shock was followed by 41 aftershocks within 26 h, among which a couple were larger than magnitude (Mw) 6.5. These two large aftershocks occurred on fault(s) which had similar orientation as the one that caused the main shock, contributing to strain release along the MHT. The rupture area of the main shock overlaps the meisoseismal zone of the 1833 Nepal earthquake and is immediately to the west of the 1934 Bihar-Nepal earthquake. This region had accumulated ~3 m of slip in the past 182 years, converging at a rate of ~18 mm/yr. The close match of the accumulated slip with the coseismic slip of the main event confirms that majority of the convergence between India and Tibet is stored as elastic strain energy and is released by brittle failure in earthquakes. This Nepal earthquake has highlighted that other segments of the Himalaya too have significant unrelieved elastic strain and may also rupture in similar or greater earthquakes in the future.Keywords
Earthquake, Rupture Parameters, Source Mechanism, Seismotectonics.Full Text
- Molecular Characterization of Viroid Associated with Tapping Panel Dryness Syndrome of Hevea brasiliensis from India
Abstract Views :200 |
PDF Views:88
Authors
Ajay Kumar
1,
D. M. Pandey
1,
Thomson Abraham
2,
Jacob Mathew
2,
P. Jyothsna
3,
Padma Ramachandran
3,
V. G. Malathi
4
Affiliations
1 Birla Institute of Technology, Deemed University, Mesra, Ranchi 835 215, IN
2 Rubber Research Institute of India, Kottayam 686 009, IN
3 Advanced Centre for Plant Virology, Division of Plant Pathology, Indian Agricultural Research Institute, New Delhi 110 012, IN
4 Advanced Centre for Plant Virology, Division of Plant Pathology, Indian Agricultural Research Institute, New Delhi 110 012, IN
1 Birla Institute of Technology, Deemed University, Mesra, Ranchi 835 215, IN
2 Rubber Research Institute of India, Kottayam 686 009, IN
3 Advanced Centre for Plant Virology, Division of Plant Pathology, Indian Agricultural Research Institute, New Delhi 110 012, IN
4 Advanced Centre for Plant Virology, Division of Plant Pathology, Indian Agricultural Research Institute, New Delhi 110 012, IN
Source
Current Science, Vol 108, No 8 (2015), Pagination: 1520-1527Abstract
Tapping panel dryness (TPD) disease is the most economically important malady affecting the quality and quantity of yield of rubber latex. The etiological agent of the disease has not yet been characterized. In the present communication, we report the association of a viroid belonging to potato spindle tuber viroid group (PSTVd). The isolates cloned from TPD-affected rubber samples and tomato leaves infected by the extract from TPD-affected rubber showed more than 95% identity with PSTVd.Keywords
Rubber Latex, Tapping Panel Dryness Disease, Tomato Leaves, Viroids.Full Text
- Gold and Uranium Occurrences in Quartz-Pebble Conglomerate of Iron Ore Group, Bagiyabahal-Baratangra Area, Sundargarh District, Odisha, India
Abstract Views :262 |
PDF Views:94
Authors
Affiliations
1 Atomic Minerals Directorate for Exploration and Research, Jamshedpur 831 002, IN
1 Atomic Minerals Directorate for Exploration and Research, Jamshedpur 831 002, IN
Source
Current Science, Vol 111, No 12 (2016), Pagination: 1917-1921Abstract
India is deficient in both gold and uranium resources. Almost one-third of the annual global mine production of ~2500 tonnes of gold is imported into India to fulfil the high gold consumption. Uranium is important for production of nuclear energy, more specifically to execute the country's ambitious programme to generate 20 GW of electricity by 2020.Full Text
- Antiproliferative and Antibacterial Activity of Some Para-Substituted Benzylideneacetophenones and Establishing their Structure Activity Relationship
Abstract Views :269 |
PDF Views:75
Authors
Deepak Chowrasia
1,
Nisha Sharma
1,
Ajay Kumar
1,
Vinod Dohrey
1,
Md. Arshad
2,
Asif Jafri
2,
Juhi Rais
2,
Madhu Gupta
2,
Sahabjada
2
Affiliations
1 University Institute of Pharmacy, Chhatrapati Shahu Ji Maharaj University, Kanpur 208 024, IN
2 Department of Zoology, Lucknow University, Lucknow 226 007, IN
1 University Institute of Pharmacy, Chhatrapati Shahu Ji Maharaj University, Kanpur 208 024, IN
2 Department of Zoology, Lucknow University, Lucknow 226 007, IN
Source
Current Science, Vol 114, No 02 (2018), Pagination: 391-396Abstract
We report here in-vitro antiproliferative and antibacterial activity of para-substituted benzylideneacetophenones and established their structure activity relationship to optimize para position as a biologically-oriented-synthetic target for design of small moleculebased future anticancer/antibacterial agents. Among synthesized compounds, 1c exhibits excellent antiproliferative activity against human osteosarcoma cell line (MG-63) compared to 1b and 1a suggesting dimethylamino (–N(CH3)2) functionality as a better para-substituted analogue for in-future anticancer agents. Similarly antibacterial screening of the aforesaid compounds against different strains of Gramnegative and Gram-positive bacteria reveals methoxy (–OCH3) rather than dimethylamino (–N(CH3)2) as a better para-substituted functionality on ring B comparatively. From our results, we justify our theory ‘lipophilicity affects antibacterial activity’.Keywords
Antiproliferative, Antibacterial Assay, Benzylideneacetophenone, MTT Assay.Full Text
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- Chowrasia, D., Karthikeyan, C., Choure L., Sahabjada, Gupta, G. and Arshad, M., Synthesis, characterization and anti cancer activity of some fluorinated 3,6-diaryl-[1,2,4]triazolo[3,4-b][1,3,4] thiadiazoles. Arab. J. Chem., 2013 (in press).
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- Kumar, C. S. C., Loh, W. S., Ooi, C. W., Quah, C. K. and Fun, H. K., Heteroarylchalcones: design, synthesis, X-ray crystal structures and biological evaluation. Molecules, 2013, 18(10), 12707–12724.
- Nguyen, T. T. N., Do, T. H., Huynh, T. N. P., Tran, C. D. T. and Thai, K. M., Synthesis and antibacterial activity of some heterocyclic chalcone analogues alone and in combination with antibiotics. Molecules, 2012, 17(6), 6684–6696.
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- Solomon, V. R. and Lee, H., Anti-breast cancer activity of heteroarylchalcone derivatives. Biomed. Pharmacother., 2012, 66(3), 213–220.
- Kumar, D., Kumar, N. M., Akamatsu, K., Kusaka, E., Harada, H. and Ito, T., Synthesis and biological evaluation of indolylchalcones as antitumor agents. Bioorg. Med. Chem. Lett., 2010, 20(13), 3916–3919.
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- Hayat, F., Moseley, E., Salahuddin, A., Zyl, R. L. V. and Azam, A., Antiprotozoal activity of chloro-quinoline based chalcones. Eur. J. Med. Chem., 2011, 46(5), 1897–1905.
- Kotra, V., Ganapathy, S. and Adapa, S. R., Synthesis of new quinolinylchalcones as anticancer and anti-inflammatory agents. Indian J. Chem., 2010, 49(B), 1109–1116.
- Rizvi, S. U. F., Siddiqui, H. L., Johns, M., Detorio, M. and Schinazi, R. F., Anti-HIV-1 and cytotoxicity studies of piperidylthienylchalcones and their 2-pyrazoline derivatives. Med. Chem. Res., 2012, 21(11), 3741–3749.
- Ahmad, M. S., Sahabjada, Jafri, A., Ahmad, S., Afzal, M. and Arshad, M., Induction of apoptosis and antiproliferative activity of naringenin in human epidermoid carcinoma cell through ROS generation and cell cyle arrest. PLoS ONE, 2014, 9(10), e110003; doi:10.1371/journal.pone.0098409.
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- Investigating the Performance of Snowmelt Runoff Model Using Temporally Varying Near-Surface Lapse Rate in Western Himalayas
Abstract Views :194 |
PDF Views:76
Authors
Affiliations
1 Inter Disciplinary Program (IDP) in Climate Studies and Department of Civil Engineering, Indian Institute of Technology Bombay, Mumbai 400 076, ID
2 Inter Disciplinary Program (IDP) in Climate Studies and Department of Civil Engineering, Indian Institute of Technology Bombay, Mumbai 400 076, IN
3 Department of Civil Engineering, Indian Institute of Technology Bombay, Mumbai 400 076, IN
4 National Institute of Hydrology, Roorkee 247 667, IN
1 Inter Disciplinary Program (IDP) in Climate Studies and Department of Civil Engineering, Indian Institute of Technology Bombay, Mumbai 400 076, ID
2 Inter Disciplinary Program (IDP) in Climate Studies and Department of Civil Engineering, Indian Institute of Technology Bombay, Mumbai 400 076, IN
3 Department of Civil Engineering, Indian Institute of Technology Bombay, Mumbai 400 076, IN
4 National Institute of Hydrology, Roorkee 247 667, IN
Source
Current Science, Vol 114, No 04 (2018), Pagination: 808-813Abstract
The present study assesses the effect of accounting the temporal variation of near-surface lapse rate in the conceptual, degree-day snowmelt runoff model simulations in a cold-desert region of Himalayas. The nearsurface lapse rate over Spiti basin shows seasonal variation during a year. The results obtained show that the inclusion of monthly variation of lapse rate in the hydrological modelling is able to capture the observed hydrograph more efficiently than when an annually constant value of lapse rate is employed. Based on our results and considering the available data, a monthly representation of near-surface lapse rates in the temperature index based models is recommended for Himalayan basins.Keywords
Himalayas, Lapse Rate, Snowmelt Runoff Model, Temporal Variation.Full Text
References
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- Shrestha, A. B., Agrawal, N. K., Alfthan, B., Bajracharya, S. R., Marechal, J. and van Oort, B., The Himalayan Climate and Water Atlas: Impact of climate change on water resources in five of Asia’s major river basins. ICIMOD, GRID-Arendal and CICERO, 2015.
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- Comparing the Imitating Capabilities of Parrots and Crows with Human Beings Using COMSOL Multiphysics
Abstract Views :272 |
PDF Views:73
Authors
Affiliations
1 I. K. Gujral Punjab Technical University, Kapurthala 144 603, IN
2 Electronics and Communication Engineering Department, Beant College of Engineering and Technology, Gurdaspur 143 521, IN
3 Department of Electronics, University of Jammu, Jammu 180 006, IN
1 I. K. Gujral Punjab Technical University, Kapurthala 144 603, IN
2 Electronics and Communication Engineering Department, Beant College of Engineering and Technology, Gurdaspur 143 521, IN
3 Department of Electronics, University of Jammu, Jammu 180 006, IN
Source
Current Science, Vol 114, No 11 (2018), Pagination: 2343-2352Abstract
Speech signal is a natural means of communication. It uses small units of sound to convey feelings and messages. Birds also use sound signals to express their emotions. Some birds, like parrots and crows, are capable of imitating the speech of other animals. The aim of this study is to compare the imitating capabilities of these birds with those of human beings. The software COMSOL Multiphysics has been used for investigating the effect of dimensional modifications of the vocal tract on the system output. The analysis of the results shows that the acoustic spaces used by human beings, parrots and crows are not overlapping, but similar in shape. Further, maximum formant scattering is observed in human beings and minimum for parrots. The results may be important for understanding the vocal tract modulation, for example, to generate artificial food calls to assemble the birds for feeding medicines to avoid spread of diseases, specifically by parrots and crows as they try to settle down near human civilizations.Keywords
Birds Calls, Cardinal Vowels, Imitation, Speech Production.Full Text
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- Modelling Finite and Infinite Behaviour of Cancer Stages Using Buchi and Finite Automata
Abstract Views :260 |
PDF Views:74
Authors
Natasha Singh
1,
Ajay Kumar
1
Affiliations
1 Department of Science and Engineering, Thapar Institute of Engineering and Technology, Patiala - 147 004, IN
1 Department of Science and Engineering, Thapar Institute of Engineering and Technology, Patiala - 147 004, IN
Source
Current Science, Vol 115, No 4 (2018), Pagination: 677-681Abstract
Cancer is an incurable disease in which abnormal cells multiply uncontrollably and infect the surrounding tissues and organs of the body. A Buchi automaton is a finite automaton that operates on infinite input words. This article presents normal cell division and cancer progression using the finite automata and Buchi automaton respectively. It will help in understanding the intricacies of cancer, and can ultimately benefit in designing an effective treatment that can slow down the progression of cancer.Keywords
Buchi Automaton, Cancer Progression, Cell Division, Doubling, Replication.Full Text
References
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- Omega Automata and its Classes
Abstract Views :259 |
PDF Views:86
Authors
Natasha Singh
1,
Ajay Kumar
1
Affiliations
1 Thapar Institute of Engineering and Technology, Patiala 147 003, IN
1 Thapar Institute of Engineering and Technology, Patiala 147 003, IN
Source
Current Science, Vol 115, No 11 (2018), Pagination: 2042-2051Abstract
ω-automata is a variant of finite automata which accepts infinite strings. It represents the behaviour of the infinite systems (hardware, operating system and control systems) which are not expected to end. A variety of conditions are used to represent the set of accepting strings in ω-automata. This paper summarizes various types of ω-automata, their transition functions and accepting conditions. In addition, this paper also summarizes the applicability of omega automata in various interdisciplinary fields.Keywords
Büchi Automata, Co-Buchi Automata and Muller Automata, Rabin Automata, Streett Automata.Full Text
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- Health-Related Analysis of Uranium in Fazilka District, Punjab, India
Abstract Views :257 |
PDF Views:76
Authors
Affiliations
1 Department of Applied Sciences, Guru Kashi University, Talwandi Saboo 151 302, IN
2 Department of Physics, DAV College, Amritsar 143 001, IN
1 Department of Applied Sciences, Guru Kashi University, Talwandi Saboo 151 302, IN
2 Department of Physics, DAV College, Amritsar 143 001, IN
Source
Current Science, Vol 115, No 11 (2018), Pagination: 2079-2084Abstract
Laser fluorimetry technique has been used to estimate uranium concentration in groundwater samples collected from 20 villages of Fazilka district, Punjab, India. The uranium concentration was found to vary from 4.32 to 83.99 μg l–1 at different locations with mean concentration of 26.51 μg l–1. Also, 24% of the drinking water samples exceeded the safe limits set by WHO, while 9% was above the limit set by AERB. Certain health risk factors like annual effective dose, excess cancer risk and lifetime average daily dose were also evaluated. The study also included uranium estimation in soil samples collected from the same villages using wavelength dispersive X-ray fluorescence technique. All the values were found to be well within the safe limits. Topography of the region seems to be the most likely reason for higher uranium concentration at some locations.Keywords
Annual Effective Dose, Laser Fluorimetry, Safe Limits, Uranium.Full Text
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- Synthetic Modulation Including Structure Establishment, Antiproliferative Activity of Some p-Aryl Substituted (Z)-2-Cyanoethylideneacetohydrazides, and their Structure Activity Relationship
Abstract Views :229 |
PDF Views:81
Authors
Deepak Chowrasia
1,
Nisha Sharma
1,
Ajay Kumar
1,
Md Arshad
2,
Sahabjada Siddiqui
2,
Asif Jafri
2,
Juhi Rahis
2
Affiliations
1 University Institute of Pharmacy, Chhatrapati Shahu ji Maharaj (CSJM) University, Kalyanpur, Kanpur 208 024, IN
2 Department of Zoology, Lucknow University, Lucknow 226 007, IN
1 University Institute of Pharmacy, Chhatrapati Shahu ji Maharaj (CSJM) University, Kalyanpur, Kanpur 208 024, IN
2 Department of Zoology, Lucknow University, Lucknow 226 007, IN
Source
Current Science, Vol 115, No 12 (2018), Pagination: 2287-2290Abstract
A series of p-substituted aryl-2-cyanoethylideneacetohydrazides derivatives (2a-j) were successfully synthesized in the laboratory (yield 60–80%). The synthesized compounds were screened for their antiproliferative activity against MCF-7 (estrogen dependent human breast cancer cell line), SaOS-2 (osteosarcoma cell line), and K562 (myeloid leukemia cell line) by MTT (3-(4,5-dimethylthiazol-2-yl)-2,5- diphenyltetrazolium bromide) reduction assay. They showed moderate to mild antiproliferative activity, (2j) being the most potent in the series with an IC50 55, 64 and 35 μM against MCF-7, SaOS-2 and K562 cell lines, depict p-nitro as a better antiproliferative substituent comparatively. We have also tested the hypothesis – ‘Electron withdrawing phenomenon affects antiproliferative activity’.Keywords
Cancer, Cyanoacetohydrazide, Electron Withdrawing Ring Substituent, MTT Assay.Full Text
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- Is Domestication of Nilgai Possible?
Abstract Views :441 |
PDF Views:84
Authors
Affiliations
1 Veer Kunwar Singh College of Agriculture, Bihar Agricultural University, Sabour, Dumraon 802 136, IN
1 Veer Kunwar Singh College of Agriculture, Bihar Agricultural University, Sabour, Dumraon 802 136, IN
Source
Current Science, Vol 116, No 7 (2019), Pagination: 1045-1046Abstract
All species on earth have some unique ecological function, and we need to explore their use for better well-being. In recent times, nilgai or blue bull (Boselaphus tragocamelus Pallas) is one of the most studied animals after cow in the agrarian society of India. Nilgai shares the fodder of domestic animals and also damages the crops in Bihar and adjoining states. This has forced the government to declare this animal as vermin (pests or nuisance animals that spread diseases or destroy crops or livestock)1. Maximum damage to crops was reported in the Kaimaur, Buxar, Bhojpur, Vaishali, East- Champaran, Supaul, Nalanda and Patna districts of Bihar. In 2017, farmers demanded immediate action and forced the officials of Vaishali and Nalanda districts to permit the killing of nilgai (Table 1)2. Although nilgai is the only member of the genus Boselaphus, the largest Asian antelope has an Indian subcontinent origin3. This animal was first described and named by the German zoologist Peter Simon Pallas in 1766 (ref. 4).Full Text
References
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- Propagation through Root Suckers in Garcinia lanceifolia Roxb., an Endemic Medicinal Plant Species of North East India
Abstract Views :109 |
PDF Views:66
Authors
Affiliations
1 Silviculture and Forest Management Division, Rain Forest Research Institute, Jorhat 785 010, IN
2 Forest Ecology and Climate Change Division, Rain Forest Research Institute, Jorhat 785 010, IN
1 Silviculture and Forest Management Division, Rain Forest Research Institute, Jorhat 785 010, IN
2 Forest Ecology and Climate Change Division, Rain Forest Research Institute, Jorhat 785 010, IN
Source
Current Science, Vol 124, No 3 (2023), Pagination: 291-291Abstract
No Abstract.Keywords
No Keywords.Full Text
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- Precise Mosaicing of Mouza Plans for the Preparation of Digital Cadastral Map Using GNSS
Abstract Views :111 |
PDF Views:76
Authors
Affiliations
1 CSIR-Central Institute of Mining and Fuel Research, Dhanbad 826 015, IN
1 CSIR-Central Institute of Mining and Fuel Research, Dhanbad 826 015, IN
Source
Current Science, Vol 124, No 4 (2023), Pagination: 467-477Abstract
Global Navigation Satellite System (GNSS), an advanced surveying system, is used to determine three-dimensional points accurately. The present study was conducted in Kasta East Coal Block of the West Bengal Power Development Corporation Limited (WBPDCL), India, focusing on data generation, establishing boundary coordinates and mosaicing of mouza plans using real-time kinematic approach. Base station and primary control points were established by the static method. It evaluates the geospatial information using GNSS and quantification of the accuracy of the geo-referenced cadastral map of kasta east coal block of WBPDCL. Scanned mouza plans were converted to vector format through AutoCAD, oriented and placed precisely with the help of established ground control points. The features of the cadastral map were tuned by superimposing the vector cadastral map of the study area. Assessment of the vector cadastral map showed better accuracy and less distortion in large-area parcels/khasras. More variations were observed in small-area khasras. Similarly, smaller mouzas showed more variation compared to larger ones. Distortions were due to manual error in digitization and technical error in scanning. The methodology of mosaicing presented here will be useful for updating the cadastral maps with improved precision in digital cadastral plan preparation.Keywords
Cadastral Maps, Digitization, Georeferencing, Mosaicing, Satellite System.Full Text
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- Volume of Tree Species
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Authors
Affiliations
1 Environment and Forest Economics, ICFRE-Rain Forest Research Institute, Jorhat 785 010, IN
1 Environment and Forest Economics, ICFRE-Rain Forest Research Institute, Jorhat 785 010, IN
Source
Current Science, Vol 125, No 8 (2023), Pagination: 814-814Abstract
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References
- Apoorva, M. R. et al., Curr. Sci., 2023, 125(3), 324–329.