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Saikia A, Mejicanos G, Rothy J, Rajendiran E, Yang C, Nyachoti M, Lei H, Bergsma R, Wu Y, Jin S, Rodas-Gonzalez A. Pork carcass composition, meat and belly qualities as influenced by feed efficiency selection in replacement boars from Large White sire and dam lines. Meat Sci 2024; 210:109423. [PMID: 38218007 DOI: 10.1016/j.meatsci.2023.109423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 12/24/2023] [Accepted: 12/28/2023] [Indexed: 01/15/2024]
Abstract
This study evaluated carcass attributes, meat and belly qualities in finisher boars (n = 79) selected for feed efficiency (low, intermediate and high) based on estimated breeding value for feed conversion ratio within a Large White dam and sire genetic lines. The sire line had lower trimmed fat proportions and higher lean than the dam line (P < 0.01). Genetic lines expressed slight colour changes and drip losses (P < 0.05), with no differences in pH, marbling and cooking traits (P > 0.05). High-efficient animals presented the highest lean yield (P < 0.01), the lowest trimmed fat proportion (P < 0.01) and no effect on meat and belly quality attributes (P > 0.05) compared with other efficient groups. Interaction between efficiency group and genetic line was only detected for belly weight and thickness (P < 0.01). High-efficient animals offer a greater leanness level, with minimal impact on meat and belly quality traits.
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Affiliation(s)
- A Saikia
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - G Mejicanos
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - J Rothy
- Food Human Nutritional Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - E Rajendiran
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - C Yang
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - M Nyachoti
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - H Lei
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada; Topigs Norsvin Canada Inc., Oak Bluff, MB R4G 0C4, Canada
| | - R Bergsma
- Topigs Norsvin Research Centre, Beuningen, the Netherlands
| | - Y Wu
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - S Jin
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - A Rodas-Gonzalez
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada.
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Debnath J, Debbarma J, Debnath A, Meraj G, Chand K, Singh SK, Kanga S, Kumar P, Sahariah D, Saikia A. Flood susceptibility assessment of the Agartala Urban Watershed, India, using Machine Learning Algorithm. Environ Monit Assess 2024; 196:110. [PMID: 38172457 DOI: 10.1007/s10661-023-12240-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 12/14/2023] [Indexed: 01/05/2024]
Abstract
Frequent floods are a severe threat to the well-being of people the world over. This is particularly severe in developing countries like India where tropical monsoon climate prevails. Recently, flood hazard susceptibility mapping has become a popular tool to mitigate the effects of this threat. Therefore, the present study utilized four distinctive Machine Learning algorithms i.e., K-Nearest Neighbor, Decision Tree, Naive Bayes, and Random Forest to estimate flood susceptibility zones in the Agartala Urban Watershed of Tripura, India. The latter experiences debilitating floods during the monsoon season. A multicollinearity test was conducted to examine the collinearity of the chosen flood conditioning factors, and it was seen that none of the factors were compromised by multicollinearity. Results showed that around three-fourths of the AUW area was classified as moderate to very high flood-prone zones, while over 20 percent was between low and very low flood-prone zones. The models applied performed well with ROC-AUC scores greater than 70 percent and MAE, MSE, and RMSE scores less than 30 percent. DT and RF algorithms were suggested for places with similar physical characteristics based on their outstanding performance and the training datasets. The study provides valuable insights to policymakers, administrative authorities, and local stakeholders to cope with floods and enhance flood prevention measures as a climate change adaptation strategy in the AUW.
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Affiliation(s)
- Jatan Debnath
- Department of Geography, Gauhati University, Guwahati, Assam, 781014, India.
| | - Jimmi Debbarma
- Department of Geography & Disaster Management, Tripura University, Agartala, Tripura, India
| | - Amal Debnath
- Department of Forestry & Biodiversity, Tripura University, Agartala, Tripura, India
| | - Gowhar Meraj
- Department of Ecosystem Studies, University of Tokyo, Bunkyo City, Tokyo, Japan
| | - Kesar Chand
- Centre for Environmental Assessment & Climate Change, GB Pant National Institute of Himalayan Environment (NIHE), Himachal Regional Centre (Himachal Pradesh), Kullu, India
| | - Suraj Kumar Singh
- Centre for Sustainable Development, Suresh Gyan Vihar University, Jaipur, India
| | - Shruti Kanga
- Department of Geography , Central University of Punjab, Bathinda, India
| | - Pankaj Kumar
- Institute for Global Environmental Strategies, Hayama, Japan
| | | | - Anup Saikia
- Department of Geography, Gauhati University, Guwahati, Assam, 781014, India
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Ahmed R, Saikia A. Pandora’s Box: A spatiotemporal assessment of elephant-train casualties in Assam, India. PLoS One 2022; 17:e0271416. [PMID: 35830377 PMCID: PMC9278769 DOI: 10.1371/journal.pone.0271416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 06/29/2022] [Indexed: 11/19/2022] Open
Abstract
Railways are an indispensable component of sustainable transportation systems, but also exact a toll on wildlife. Wild Asian elephants are often killed by trains in Assam, India, where we assess temporal variations in the occurrences of elephant-train collisions (ETCs) and casualties during 1990–2018. This study also assesses spatially varying relationships between elephant-train collision (ETC) rates and elephant and train densities in the adjoining 10 km2 grid cells of 11 prioritized railroad segments using ordinary least squares (OLS) and geographically weighted regression (GWR) models. The temporal analysis indicated that ETCs spiked at certain hours and months. The adult and calf elephant casualties on the railroads were found to be two to fivefold high during the post monsoon season compared to other seasons. During the operation period of meter gauge railroads (1990–1997), the proportions of ETCs and casualties were only 15.6% and 8.7% respectively. However, these increased substantially to 84.4% and 91.3% respectively during the operation of broad gauge railroads (1998–2018). The OLS model indicated that both elephant and train densities explained 37% of the variance of ETC rate, while GWR model showed 83% of the variance of ETC rate. The local coefficient values of GWR indicated that both the predictor variables interplayed significantly and positively to determine ETC rates in the Mariani-Nakachari and Khatkhati-Dimapur railroad segments. However, the relationship between ETC rate and elephant density is significantly negative in the Habaipur-Diphu railroad, implying that the elephant population along this railroad stretch is significantly affected by railways through large scale ETCs. Hence, there is an urgent need to address long-term mitigation strategies so that elephants can be conserved by providing safe passages and survival resources along railway lines.
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Affiliation(s)
- Rekib Ahmed
- Department of Geography, Gauhati University, Guwahati, India
| | - Anup Saikia
- Department of Geography, Gauhati University, Guwahati, India
- * E-mail:
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Baruah UD, Robeson SM, Saikia A, Mili N, Sung K, Chand P. Spatio-temporal characterization of tropospheric ozone and its precursor pollutants NO 2 and HCHO over South Asia. Sci Total Environ 2022; 809:151135. [PMID: 34695476 DOI: 10.1016/j.scitotenv.2021.151135] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Revised: 10/14/2021] [Accepted: 10/17/2021] [Indexed: 06/13/2023]
Abstract
In recent decades, South Asia has experienced declining air quality, with much of the attention being focused on extremely high levels of particulate matter. Here, we analyze tropospheric ozone (O3), formaldehyde (HCHO), and nitrogen dioxide (NO2) to assess other measures of air quality across South Asia from 2008 to 2018. The IASI-Forli retrieved tropospheric ozone data was validated with ozonesonde, reanalysis (ERA5), satellite (TES), and model simulation products (GEOS-Chem and TOMCAT/SLIMCAT). Space-based observations of these three trace gases were used to conduct a spatio temporal analysis over South Asia using trend analysis (Theil-Sen and linear regression), change-point detection (Pettitt's test), and hotspot identification (Getis-Ord Gi*). We used the formaldehyde-nitrogen dioxide ratio (FNR) to identify NOx limited, VOC limited, and transitional regimes in South Asia. Counter to previous studies, a statistically significant decrease of HCHO (-0.0041 DU yr-1) and O3 (-0.064 DU yr-1) was detected for South Asia; however, NO2 is increasing the 0.001 DU yr-1 over South Asia during 2008-18. The Indo-Gangetic Plains emerged as being critically affected by the three trace gases. Certain parts of southern and south-eastern India are gradually emerging as NO2 and HCHO hotpots. No significant O3 hotspots were discernible, though coldspots existed along the Himalaya belt of India, Nepal, and Bhutan and mountainous tracts of Pakistan. FNR indicates the reduction of NOx in NOx-limited regime of the Indo-Gangetic Plains reduced the formation of tropospheric O3 over South Asia.
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Affiliation(s)
- Ujjal Deka Baruah
- Department of Geography, Cotton University, Guwahati 781001, India; Department of Geography, Gauhati University, Guwahati 781014, India.
| | - Scott M Robeson
- Department of Geography, Indiana University Bloomington, Student Building 120, 701 E. Kirkwood Avenue, Bloomington, IN 47405-7100, USA.
| | - Anup Saikia
- Department of Geography, Gauhati University, Guwahati 781014, India.
| | - Nitashree Mili
- Department of Geography, Cotton University, Guwahati 781001, India.
| | - Kang Sung
- Department of Civil, Structural and Environmental Engineering, Ketter Hall, University of Buffalo, NY 14228, USA.
| | - Pritam Chand
- Department of Geography, School of Environment and Earth Sciences, Central University of Punjab, Bathinda 151401, India.
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Saikia A, Karak N. Cellulose nanofiber-polyaniline nanofiber-carbon dot nanohybrid and its nanocomposite with sorbitol based hyperbranched epoxy: Physical, thermal, biological and sensing properties. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2019.124049] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Saikia A, Karak N. Fabrication of renewable resource based hyperbranched epoxy nanocomposites with MWCNT-polyaniline nanofiber-carbon dot nanohybrid as tough anticorrosive materials. EXPRESS POLYM LETT 2019. [DOI: 10.3144/expresspolymlett.2019.84] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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7
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Lesiv M, Laso Bayas JC, See L, Duerauer M, Dahlia D, Durando N, Hazarika R, Kumar Sahariah P, Vakolyuk M, Blyshchyk V, Bilous A, Perez‐Hoyos A, Gengler S, Prestele R, Bilous S, Akhtar IUH, Singha K, Choudhury SB, Chetri T, Malek Ž, Bungnamei K, Saikia A, Sahariah D, Narzary W, Danylo O, Sturn T, Karner M, McCallum I, Schepaschenko D, Moltchanova E, Fraisl D, Moorthy I, Fritz S. Estimating the global distribution of field size using crowdsourcing. Glob Chang Biol 2019; 25:174-186. [PMID: 30549201 PMCID: PMC7379266 DOI: 10.1111/gcb.14492] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 09/16/2018] [Indexed: 05/07/2023]
Abstract
There is an increasing evidence that smallholder farms contribute substantially to food production globally, yet spatially explicit data on agricultural field sizes are currently lacking. Automated field size delineation using remote sensing or the estimation of average farm size at subnational level using census data are two approaches that have been used. However, both have limitations, for example, automatic field size delineation using remote sensing has not yet been implemented at a global scale while the spatial resolution is very coarse when using census data. This paper demonstrates a unique approach to quantifying and mapping agricultural field size globally using crowdsourcing. A campaign was run in June 2017, where participants were asked to visually interpret very high resolution satellite imagery from Google Maps and Bing using the Geo-Wiki application. During the campaign, participants collected field size data for 130 K unique locations around the globe. Using this sample, we have produced the most accurate global field size map to date and estimated the percentage of different field sizes, ranging from very small to very large, in agricultural areas at global, continental, and national levels. The results show that smallholder farms occupy up to 40% of agricultural areas globally, which means that, potentially, there are many more smallholder farms in comparison with the two different current global estimates of 12% and 24%. The global field size map and the crowdsourced data set are openly available and can be used for integrated assessment modeling, comparative studies of agricultural dynamics across different contexts, for training and validation of remote sensing field size delineation, and potential contributions to the Sustainable Development Goal of Ending hunger, achieve food security and improved nutrition and promote sustainable agriculture.
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Affiliation(s)
- Myroslava Lesiv
- International Institute for Applied Systems Analysis, ESMLaxenburgAustria
| | | | - Linda See
- International Institute for Applied Systems Analysis, ESMLaxenburgAustria
| | - Martina Duerauer
- International Institute for Applied Systems Analysis, ESMLaxenburgAustria
| | - Domian Dahlia
- International Institute for Applied Systems Analysis, ESMLaxenburgAustria
| | | | | | | | - Mar'yana Vakolyuk
- Department of Energy and Mass Exchange in GeosystemsState Institution Scientific Centre for Aerospace Research of the Earth Institute of Geological Science National Academy of Sciences of UkraineKyivUkraine
| | - Volodymyr Blyshchyk
- Forest ManagementNacional'nyj Universytet Bioresursiv i Pryrodokorystuvannya UkrayinyKyivUkraine
| | - Andrii Bilous
- Department of Energy and Mass Exchange in GeosystemsState Institution Scientific Centre for Aerospace Research of the Earth Institute of Geological Science National Academy of Sciences of UkraineKyivUkraine
| | - Ana Perez‐Hoyos
- European Commission Joint Research Centre Ispra SectorIspraItaly
| | - Sarah Gengler
- Environmental SciencesUniversité catholique de Louvain, Earth and Life InstituteLouvain‐la‐NeuveBelgium
| | - Reinhard Prestele
- Department of Earth Sciences, Environmental Geography GroupVrije Universiteit AmsterdamAmsterdamThe Netherlands
| | - Svitlana Bilous
- Forest ManagementNacional'nyj Universytet Bioresursiv i Pryrodokorystuvannya UkrayinyKyivUkraine
| | - Ibrar ul Hassan Akhtar
- Department of MeteorologyCOMSATS UniversityIslamabadPakistan
- Pakistan Space and Upper Atmosphere Research CommissionIslamabadPakistan
| | | | | | | | - Žiga Malek
- Vrije Universiteit Amsterdam Faculteit Economische wetenschappen en BedrijfskundeAmsterdamThe Netherlands
| | | | | | | | | | - Olha Danylo
- International Institute for Applied Systems Analysis, ESMLaxenburgAustria
| | - Tobias Sturn
- International Institute for Applied Systems Analysis, ESMLaxenburgAustria
| | - Mathias Karner
- International Institute for Applied Systems Analysis, ESMLaxenburgAustria
| | - Ian McCallum
- International Institute for Applied Systems Analysis, ESMLaxenburgAustria
| | - Dmitry Schepaschenko
- International Institute for Applied Systems Analysis, ESMLaxenburgAustria
- Soil ScienceMoscow State Forest UniversityMoscowRussia
| | | | - Dilek Fraisl
- International Institute for Applied Systems Analysis, ESMLaxenburgAustria
| | - Inian Moorthy
- International Institute for Applied Systems Analysis, ESMLaxenburgAustria
| | - Steffen Fritz
- International Institute for Applied Systems Analysis, ESMLaxenburgAustria
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Laso Bayas JC, Lesiv M, Waldner F, Schucknecht A, Duerauer M, See L, Fritz S, Fraisl D, Moorthy I, McCallum I, Perger C, Danylo O, Defourny P, Gallego J, Gilliams S, Akhtar IUH, Baishya SJ, Baruah M, Bungnamei K, Campos A, Changkakati T, Cipriani A, Das K, Das K, Das I, Davis KF, Hazarika P, Johnson BA, Malek Z, Molinari ME, Panging K, Pawe CK, Pérez-Hoyos A, Sahariah PK, Sahariah D, Saikia A, Saikia M, Schlesinger P, Seidacaru E, Singha K, Wilson JW. A global reference database of crowdsourced cropland data collected using the Geo-Wiki platform. Sci Data 2017; 4:170136. [PMID: 28949323 PMCID: PMC5613736 DOI: 10.1038/sdata.2017.136] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Accepted: 08/02/2017] [Indexed: 11/09/2022] Open
Abstract
A global reference data set on cropland was collected through a crowdsourcing campaign using the Geo-Wiki crowdsourcing tool. The campaign lasted three weeks, with over 80 participants from around the world reviewing almost 36,000 sample units, focussing on cropland identification. For quality assessment purposes, two additional data sets are provided. The first is a control set of 1,793 sample locations validated by students trained in satellite image interpretation. This data set was used to assess the quality of the crowd as the campaign progressed. The second data set contains 60 expert validations for additional evaluation of the quality of the contributions. All data sets are split into two parts: the first part shows all areas classified as cropland and the second part shows cropland average per location and user. After further processing, the data presented here might be suitable to validate and compare medium and high resolution cropland maps generated using remote sensing. These could also be used to train classification algorithms for developing new maps of land cover and cropland extent.
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Affiliation(s)
| | - Myroslava Lesiv
- International Institute for Applied Systems Analysis (IIASA), Laxenburg, Austria
| | - François Waldner
- Université catholique de Louvain (UCL)-Earth and Life Institute, Louvain-la-Neuve, Belgium
| | - Anne Schucknecht
- European Commission-Joint Research Centre (JRC), Ispra, Italy.,Karlsruhe Institute of Technology (KIT), Department of Atmospheric Environmental Research, Garmisch-Partenkirchen 82467, Germany
| | - Martina Duerauer
- International Institute for Applied Systems Analysis (IIASA), Laxenburg, Austria
| | - Linda See
- International Institute for Applied Systems Analysis (IIASA), Laxenburg, Austria
| | - Steffen Fritz
- International Institute for Applied Systems Analysis (IIASA), Laxenburg, Austria
| | - Dilek Fraisl
- International Institute for Applied Systems Analysis (IIASA), Laxenburg, Austria
| | - Inian Moorthy
- International Institute for Applied Systems Analysis (IIASA), Laxenburg, Austria
| | - Ian McCallum
- International Institute for Applied Systems Analysis (IIASA), Laxenburg, Austria
| | - Christoph Perger
- International Institute for Applied Systems Analysis (IIASA), Laxenburg, Austria
| | - Olha Danylo
- International Institute for Applied Systems Analysis (IIASA), Laxenburg, Austria
| | - Pierre Defourny
- Université catholique de Louvain (UCL)-Earth and Life Institute, Louvain-la-Neuve, Belgium
| | - Javier Gallego
- European Commission-Joint Research Centre (JRC), Ispra, Italy
| | - Sven Gilliams
- Vlaamse Instelling voor Technologisch Onderzoek (VITO), Mol, Belgium
| | - Ibrar Ul Hassan Akhtar
- COMSATS Institute of Information Technology, Islamabad, Pakistan.,Pakistan Space and Upper Atmosphere Research Commission (SUPARCO), Islamabad, Pakistan
| | | | | | | | - Alfredo Campos
- Taguay, Córdoba, Argentina.,Instituto de Clima y Agua, Instituto Nacional de Tecnología Agropecuaria (INTA), Buenos Aires, Argentina
| | | | - Anna Cipriani
- Dipartimento di Scienze Chimiche e Geologiche, University of Modena and Reggio Emilia, Modena, Italy.,Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York, USA
| | | | | | | | - Kyle Frankel Davis
- The Earth Institute, Columbia University, New York, USA.,The Nature Conservancy, New York, USA
| | | | - Brian Alan Johnson
- Institute for Global Environmental Strategies, Kamiyamaguchi, Hayama, Japan
| | - Ziga Malek
- Vrije Universiteit, Amsterdam, Netherlands
| | | | | | | | - Ana Pérez-Hoyos
- European Commission-Joint Research Centre (JRC), Ispra, Italy
| | | | | | | | - Meghna Saikia
- Don Bosco College of Engineering and Technology, Guwahati, India
| | - Peter Schlesinger
- The Tropical Agriculture Research and Higher Education Center (CATIE), Turrialba, Costa Rica.,University of Idaho, Moscow, USA
| | | | | | - John W Wilson
- Department of Zoology and Entomology, University of Pretoria, Pretoria, South Africa
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Saikia A, Sarma D, Bhuyan R, Sarmah B, Kalita D. Effect of zinc and phytase supplementation on performance, serum biochemical profiles and carcass quality of crossbred (Hampshire × Assam local) pigs. Journal of Applied Animal Research 2016. [DOI: 10.1080/09712119.2015.1031773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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10
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Deka I, Goswami J, Saikia A, Kalita D, Sarmah B. Efficacy of Pharmacologic Levels of Zinc Supplementation around Weaning for Prevention of Piglet Diarrhoea. ANIM NUTR FEED TECHN 2015. [DOI: 10.5958/0974-181x.2015.00027.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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11
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Krishnatreya M, Saikia A, Kataki A, Sharma J, Baruah M. Variations in the spatial distribution of gall bladder cancer: a call for collaborative action. Ann Med Health Sci Res 2014; 4:S329-31. [PMID: 25364614 PMCID: PMC4212402 DOI: 10.4103/2141-9248.141984] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Background: The incidence of gall bladder cancers in this part of the world is high and the spatial variation in occurrence of gall bladder cancers can be identified by using geographical information system. Materials and Methods: Data set containing the address information of gall bladder cancer patients from the District of Kamrup, India was obtained from cancer registry of a regional cancer center. The data set consisted of patients registered during the period of January 2010 to December 2012. The ArcGIS 10.0 used for the present analysis and the population density map of the District was prepared by using LandScan, 2008™. Results: There were isolated areas with very high density of cases and low population density termed as “hot spots”. Alternatively there were areas with very high population density and lesser number of cases with gall bladder cancers. Conclusion: This type of an analysis using GIS provides evidence to conduct joint research by epidemiologists and specialists from environmental and geological sciences in tandem.
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Affiliation(s)
- M Krishnatreya
- Department of Cancer Registry, A Division of Cancer Epidemiology, Dr. B Borooah Cancer Institute, Guwahati, India
| | - A Saikia
- Department of Geography, Guwahati University, Guwahati, India
| | - Ac Kataki
- Department of Cancer Registry, A Division of Cancer Epidemiology, Dr. B Borooah Cancer Institute, Guwahati, India
| | - Jd Sharma
- Department of Pathology, Dr. B Borooah Cancer Institute, Guwahati, India
| | - M Baruah
- Department of Geography, Guwahati University, Guwahati, India
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Saikia A, Sarma D, Bhuyan R, Sarmah B, Kalita D. Effect of supplementing zinc with and without phytase on serum and bristle zinc of pigs. INDIAN J ANIM RES 2014. [DOI: 10.5958/j.0976-0555.48.3.052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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13
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Bam J, Kumar P, Leishangthem GD, Saikia A, Somvanshi R. Spontaneous Cutaneous Papillomatosis in Yaks and Detection and Quantification of Bovine Papillomavirus-1 and -2. Transbound Emerg Dis 2012. [DOI: 10.1111/j.1865-1682.2012.01361.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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14
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Saikia A, Sivabalan R, Polke BG, Gore GM, Singh A, Subhananda Rao A, Sikder AK. Synthesis and characterization of 3,6-bis(1H-1,2,3,4-tetrazol-5-ylamino)-1,2,4,5-tetrazine (BTATz): novel high-nitrogen content insensitive high energy material. J Hazard Mater 2009; 170:306-313. [PMID: 19481344 DOI: 10.1016/j.jhazmat.2009.04.095] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2008] [Revised: 04/21/2009] [Accepted: 04/21/2009] [Indexed: 05/27/2023]
Abstract
This paper reports the synthesis, characterization and thermolysis studies of 3,6-bis(1H-1,2,3,4-tetrazol-5-ylamino)-1,2,4,5-tetrazine (BTATz) and 3-(1H-1,2,3,4-tetrazol-5-ylamino)-6-(3,5-dimethyl-pyrazol-1-yl)-s-tetrazine monohydrate (TADPTz). The synthesized BTATz and TADPTz have been characterized by spectroscopic techniques and the data obtained confirm their structure. TGA and DSC results suggested that BTATz decomposes in the range 265-350 degrees C and TADPTz in the range 245-275 degrees C respectively. The calculated energy of activation of BTATz and TADPTz is 212.69 and 257.29kJ/mol respectively. The experimentally determined DeltaH(f) value matches with theoretically computed heat of explosion. The computed volume of gases indicates that they can find application in gas generating compositions.
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Affiliation(s)
- A Saikia
- High Energy Materials Research Laboratory, Sutarwadi, Pune 411021, India
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Sivabalan R, Gore GM, Nair UR, Saikia A, Venugopalan S, Gandhe BR. Study on ultrasound assisted precipitation of CL-20 and its effect on morphology and sensitivity. J Hazard Mater 2007; 139:199-203. [PMID: 16879911 DOI: 10.1016/j.jhazmat.2006.06.027] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2006] [Revised: 06/12/2006] [Accepted: 06/12/2006] [Indexed: 05/11/2023]
Abstract
Applying ultrasound to crystallizing systems offers significant advantages for modifying and improving the processes as well as quality of products. This paper reports on ultrasound assisted reprecipitation of CL-20 to obtain fine particles as well as to achieve desired morphology, which will improve insensitivity characteristics. In this study, CL-20 has been reprecipitated by sonication process and has been characterized by DSC, SEM and particle size analysis. The results are compared with control CL-20 sample (unsonicated). SEM photographs revealed that sonication process offer uniform crystalline morphology without any agglomeration. The particle size of sonicated CL-20 sample obtained is around 5+/-1 microm with a narrow particle size distribution. The DSC thermogram of sonicated and unsonicated sample is identical. CL-20 samples were subjected to impact and friction sensitivity experiments, the results indicate the sensitivity characteristics reduced considerably. Ultrasonic assisted crystallization technique reduces the time of reprecipitation considerably with an enhanced recovery of CL-20 with a very narrow particle size distribution.
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Affiliation(s)
- R Sivabalan
- High Energy Materials Research Laboratory, Sutarwadi, Pune 411 021, India.
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Nath MC, Saikia A. Effects of essential fatty acids, inositol, vitamin B12 and hydrolyzed glucose-cyclo-acetoacetate on blood coagulation factors in rabbits exhibiting hyperlipemia induced by feeding saturated fat. J Nutr 1959; 69:403-11. [PMID: 14426139 DOI: 10.1093/jn/69.4.403] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Nath M, Saikia A. Physiological significance of inositol, vitamin B12 and glucose cycloacetoacetate in cholesterol-induced atherosclerosis on rabbits. Arch Biochem Biophys 1959. [DOI: 10.1016/0003-9861(59)90398-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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