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Singh, Ravindra,Rao, D.Raghavendra,Premalatha, V.,Mondal, Sipra,Kariappa, B.K.,Jayaswal, K.P.,Datta, R.K. Korean Society of Sericultural Science 2001 International Journal of Industrial Entomology Vol.2 No.2
Data from an experiment involving six polyvoltine and three bivoltine silkworm breeds have been analysed to know the level of hybrid rigour and cocoon shape variation in Fl hybrids among silkworm breeds with lows medium and high cocoon weight. Results indicated significantly positive heterosis for several quantitative characters with maximum total heterosis over mid parent value in hybrids between low and medium followed by low and low, medium and medium, low and high and high and low cocoon-weighed breeds, respectively. Study on cocoon shape measurement revelled that among Fl hybrids, cocoons of the three combinations such as GNP ${\times}$ CSR2, GNP ${\times}$ J2 and PM ${\times}$ NB4 D2 were comparatively uniform in their cocoon shape. Importance of this study to know the level of heterosis and cocoon shape variability in different silkworm crosses hale been discussed.
Line X Tester Analysis for Economic Characters in the Bivoltine Silkworm, Bombyx mori L .
Begum, Naseema,Bhargava, A. S. K.,Ahsan, M. M.,Datta, R. K.,Rao, D. Raghavendra 한국잠사학회 1997 한국잠사곤충학회지 Vol.39 No.2
In a line X tester crossing programme (24 lines and 2 testers) the general combining ability(GCA) and specinc combining ability (SCA) effects were analyzed for five economic characters in the bivoltine silkworm,Bombyx mori L. The results showed desired GCA effects in 934D1(9500), 934B (9789) and 934A1(9855) for cocoon yield per 10,000 larvae brushed by number. Likewise, the lines found to be superior based on GCA effects for other characters were as follows; 931D (14.040 Kgs), 935E (17.023 Kga.), 934D1 (15.643 Kgs.) and 934B (15.687 Kgs.) for cocoon yield by weight: 931D (1.717 g) and 930E (1.796 g) for single cocoon weight; 932B(0.330 g) for single shell weight; 932B (18.7%), 933A (18.86%) and 935A (19.89%) for shell ratio. SCA effects showed the superiority of 932D X KA (9822 cocoon yield per 10,000 larvae brushed by number); 932A X NB4D2 (16.933 Kgs. cocoon yield per 10000 larvae brushed by weight); 931C X KA (1.911 g single cocoon weight); 934 X NB4D2 (0.371 g single shell weight and 21.0% shell ratio). The analysis indicated non-additive gene action for all the five characters.
Sunil D Santha,Surinder Jaswal,Devisha Sasidevan,Ajmal Khan,Kaushik Datta,Annu Kuruvilla 한국외국어대학교 국제지역연구센터 2016 International Area Studies Review Vol.19 No.1
This paper examines the vulnerability context of migrant workers in the informal sector in three Indian cities (Kochi, Surat and Mumbai), specifically in terms of how their livelihoods interface with climate variability, related hazard events and social inequities. It examines the progression of population vulnerability from a political economy perspective. The underlying assumption is that migrant workers’ vulnerability to climate variability in cities is closely embedded within the wider political economy of their day-to-day livelihood struggles. A mixed methodology design was adopted to carry out the study. Data from 50 migrants in each of the three cities were collected using a semi-structured interview schedule. The research demonstrates that urban vulnerability is a condition that shapes and reshapes itself continuously and fiercely, accompanied by the processes and structures of unplanned rapid urbanisation, environmental change and social exclusion. A significant feature of migrant workers’ vulnerability is its multi-dimensionality. This paper suggests that urban planners involved in environmental governance and risk reduction have to critically reflect on certain terminologies and practices in the field of climate change, while addressing these multi-dimensionalities.
Gunjal, Datta B.,Gurav, Yogesh M.,Gore, Anil H.,Naik, Vaibhav M.,Waghmare, Ravindra D.,Patil, Chandrashekhar S.,Sohn, Daewon,Anbhule, Prashant V.,Shejwal, Rajendra V.,Kolekar, Govind B. North-Holland 2019 Optical materials Vol.98 No.-
<P><B>Abstract</B></P> <P>In this work, waste tea residue, abundantly accessible, is utilized for synthesis of fluorescent carbon dots (CDs) by a simple, low cost and one step chemical oxidation method. The optical properties, surface functionality and particle size of CDs were ascertained by various techniques. The CDs exhibited excellent water solubility, optical properties, bioimaging ability etc. The fluorescence intensity of the CDs was diminished gradually with increasing concentrations of tetracycline drug owing to the inner filter effect (IFE) phenomenon. The developed fluorescent probe displayed a better linear range, excellent detection limit and interference free response to the tetracycline. This resulted in quantification of tetracycline in real sample which achieved almost 99% recoveries indicated excellent practical potential. Moreover, the CDs were used as fluorescent label for multicolour imaging of yeast cells which could open the doors for further research in biological fields.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Carbon Dots derived from waste tea residue by simple reflux method. </LI> <LI> Determination of Tetracycline by fluorescence quenching through inner filter mechanism. </LI> <LI> Simple, sensitive and interference free method. </LI> <LI> Carbon dots as a fluorescent label for multicolour cell imaging. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>Schematic of synthesis of CDs and inner filter effect based detection of tetracycline.</P> <P>[DISPLAY OMISSION]</P>
Chakrabarty, D.,Datta, S.K. The Korean Society of Plant Biotechnology 2010 Plant biotechnology reports Vol.4 No.3
Six parent and their 12 gamma ray-induced somatic flower colour mutants of garden rose were characterized to discriminate the mutants from their respective parents and understanding the genetic diversity using Random amplification of polymorphic DNA (RAPD) markers. Out of 20 primers screened, 14 primers yielded completely identical fragments patterns. The other 7 primers gave highly polymorphic banding patterns among the radiomutants. All the cultivars were identified by using only 7 primers. Moreover, individual mutants were also distinguished by unique RAPD marker bands. Based on the presence or absence of the 48 polymorphic bands, the genetic variations within and among the 18 cultivars were measured. Genetic distance between all 18 cultivars varied from 0.40 to 0.91, as revealed by Jaccard's coefficient matrix. A dendrogram was constructed based on the similarity matrix using the Neighbor Joining Tree method showed three main clusters. The present RAPD analysis can be used not only for estimating genetic diversity present in gamma ray-induced mutants but also for correct identification of mutant/new varieties for their legal protection under plant variety rights.
Prabhakara, D.L.,Datta, P.K. Techno-Press 1996 Structural Engineering and Mechanics, An Int'l Jou Vol.4 No.2
The tension and compression buckling behaviour of a square plate with localized zones of damage and subjected to non-uniform loading is studied using a finite element analysis. The influence of parameters such as position of damage, extent of damage, size of damage and position of load on instability behaviour are discussed. The dynamic behaviour for certain load and damage parameters are also presented. It is observed that the presence of damage has a marked effect on the static buckling load and natural frequency of the plate.
Sensitivity Analysis of Atmospheric Dispersion Model-RIMPUFF Using the Hartley-like Measure
Rituparna Chutia,Supahi Mahanta,D. Datta 한국전산응용수학회 2013 Journal of applied mathematics & informatics Vol.31 No.1
In this article, sensitivity analysis of atmospheric dispersion model RIMPUFF is considered. Uncertain parameters are taken to be triangular fuzzy numbers,and sensitivity analysis is carried out by using the Hartley-like measure. Codes for evaluating membership function using the Vertex method and the Hartley-like measure are prepared using Matlab.