Sabuj Kumar Chaudhuri

Bio: Sabuj Kumar Chaudhuri is an academic researcher from University of Calcutta. The author has contributed to research in topics: Intellectual property & Sustainable development. The author has an hindex of 5, co-authored 15 publications receiving 55 citations. Previous affiliations of Sabuj Kumar Chaudhuri include Bidhan Chandra Krishi Viswavidyalaya & Jadavpur University.

Collision-less shocks and solitons in dense laser-produced Fermi plasma

Abstract: The theoretical investigation of shocks and solitary structures in a dense quantum plasma containing electrons at finite temperature, nondegenerate cold electrons, and stationary ions has been carried out. A linear dispersion relation is derived for the corresponding electron acoustic waves. The solitary structures of small nonlinearity have been studied by using the standard reductive perturbation method. We have considered collisions to be absent, and the shocks arise out of viscous force. Furthermore, with the help of a standard reductive perturbation technique, a KdV–Burger equation has been derived and analyzed numerically. Under limiting cases, we have also obtained the KdV solitary profiles and studied the parametric dependence. The results are important in explaining the many phenomena of the laser–plasma interaction of dense plasma showing quantum effects.

Genetic diversity analysis of citrus cultivars and rootstocks of the north eastern India by RAPD markers

Abstract: Random amplified polymorphic DNA (RAPD) markers were used to evaluate genetic diversity among 12 cultivars and rootstocks of citrus of the North Eastern India. Ten selected decamer primers produced 97 amplified fragments, all of them except one were polymorphic and 11 were unique to some germplasms. The genetic distance measured based on Squared Euclidean Distance ranged from 16–60%, which showed the presence of low to moderate genetic diversity among the germplasms. By Ward's method of cluster analysis 12 germplasms were classified into two major clusters. All the mandarin orange cultivars viz., Darjeeling mandarin, Khasi mandarin and a wild type formed one of the distinct clusters. Sweet orange cv. Mosambi having its clear genetic identity formed another cluster with the rest of the rootstocks and cultivars. The commercial cultivar of lemon, Pati nimbu showed the closest genetic relations with the commercial cultivar of acid lime, Kagzi lime but showed a moderate distance from cultivar Gandharaj lemon and farther distance from cultivar Assam lemon. The rootstocks Rangpur lime, trifoliate orange and sour orange in order showed closer proximity with the sweet orange cv. Mosambi and that of rough lemon cv. Kata Jamir was with the common acid lime and lemon cultivars. The RAPD markers confirmed the distinction of close cultivars and also the interrelationship among different land races that can be used for the genetic improvement of citrus in this region.

RAPD profiling of some elite clones of mandarin orange (Citrus reticulata Blanco) in the North Eastern Himalayan Region of India

Abstract: Randomly amplified polymorphic DNA (RAPD) markers were used to estimate the genetic diversity of 25 phenotypically elite, nucellar clones of mandarin orange (Citrus reticulata Blanco), selected from seven locations in three geographically separate states of the North Eastern Himalayan Region of India. The 15 decamer primers generated 106 randomly amplified DNA fragments that were used as the genetic markers. The Squared Euclidean Distance measurement showed 65% maximum and 11% minimum genetic dissimilarity between the plant selections. By Ward's cluster analysis, the 25 individual plant selections were classified into two major clusters, having 15 and 10 plants each. Plants of one location were distributed within both of the two major clusters. The two major clusters were further divided into two sub-clusters each. The plants collected from three separate locations each were exclusive to these sub-clusters. Results of the analysis indicated the existence of large genetic differences among the plants of different locations and also within a single location of the region. Genetic similarity among the plants taken from geographically separated locations was also evident. The study confirms the existence of wide genetic diversity of mandarin orange plants in the North Eastern Himalyan Region of India that can be used in mandarin orange plant improvement programmes.

Freshwater fish diversity information system as a basis for sustainable fishery

Abstract: Our freshwater fish diversity is poorly studied. There is no proper documentation on freshwater fish resources of India. Due to irrational fishing practices, environmental aberrations like reduction in water volume, increased sedimentation, water abstraction, and pollution over the years this diversity is on a decline. The paper highlights some features and impacts of erosion of this biodiversity. To save this diversity and to develop a sustainable fishery practice in the country proper documentation leading to Freshwater Fish Diversity Information System is an urgent need. Some components of databases for information system development and documentation have been suggested. For standing up to this negative phenomenon a coordinated effort is needed.

Citation Indexing Its Theory And Application In Science Technology And Humanities

Abstract: Thank you very much for downloading citation indexing its theory and application in science technology and humanities. As you may know, people have search hundreds times for their favorite novels like this citation indexing its theory and application in science technology and humanities, but end up in infectious downloads. Rather than enjoying a good book with a cup of tea in the afternoon, instead they juggled with some infectious virus inside their computer.

The San Francisco Declaration on Research Assessment

Abstract: The San Francisco Declaration on Research Assessment (DORA), initiated by the American Society for Cell Biology (ASCB) together with a group of editors and publishers of scholarly journals, recognizes the need to improve the ways in which the outputs of scientific research are evaluated. The group met in December 2012 during the ASCB Annual Meeting in San Francisco and subsequently circulated a draft declaration among various stakeholders. DORA as it now stands has benefited from input by man...

Characterization of Citrus Cultivars and Clones in Cyprus Through Microsatellite and RAPD Analysis

Abstract: Fifty one accessions from the Citrus collection of the Agricultural Research Institute, Lefcosia, Cyprus (ARI), representing 8 Citrus species, were analyzed with 10 microsatellite and 6 RAPD markers. Both, microsatellite and RAPD analyses, allowed the discrimination of the studied accessions at species level. A low level of polymorphism was obtained among cultivars within the species. In the group of oranges (6 cultivars and their clones), only one out of ten SSR primers discriminated between two groups of cultivars: the commercial cultivar Shamouti and two local cultivars, Jaffa and Aematousiki, on one hand and Valencia orange and the local orange Shekeriko on the other hand. In the group of lemons (3 cultivars and their clones) all three studied varieties, local Polyphori, local Lapithou and commercial Lisbon, were distinguished by one SSR and two RAPD primers. The local mandarin Arakapas (7 accessions) and Willowleaf showed complete genetic similarity by using both microsatellite and RAPD marke...

Assessment of Genetic Diversity in Sweet Orange [ Citrus sinensis (L.) Osbeck] Cultivars of India Using Morphological and RAPD Markers

Abstract: Citrus sinensis (L.) Osbeck (sweet orange) is one of the most important commercially cultivated fruit crops of Citrus and occupies the second position after mandarins in India. Genetic diversity and inter-relationship among 22 cultivars of C. sinensis were analyzed based on morphological and RAPD markers. A total of 99 bands were generated with 20 RAPD primers, out of which 51 bands were polymorphic (51.83 %). A pair-wise similarity value between cultivars ranged from 0.48 to 1.00 (avg. 0.77). Moderate levels of polymorphism and high genetic similarity within C. sinensis suggested that cultivars have a low level of genetic diversity despite having high morphological variability. A dendrogram generated based on UPGMA separated all the cultivars into two main clusters in which two cultivars, Delta Valencia and Sweet Orange, showed distinctiveness from the rest of the cultivars. A two-dimensional plot generated from principle component analysis of RAPD data also supported the clustering pattern of dendrogram. Some primers were able to generate unique fragments, which can be used for identification of the cultivars. This study indicated the presence of low genetic diversity within C. sinensis, which could be explained by the fact that much of the phenotypic variation observed may be because of some somatic mutations.