scholarly journals Cytological and Molecular Studies Based on Ovarian Nurse Cell’s Polytene Chromosome and ITS-2 Sequence of Anopheles vagus in West Bengal

2016 ◽  
Vol 2 (4) ◽  
Keyword(s):  
Polytene Chromosome ◽  
West Bengal ◽  
Molecular Studies ◽  
Anopheles Vagus

scholarly journals Observations on the pupal productivity of Culex tritaeniorhynchus in rice fields of West Bengal, India: implications for vector management (Diptera: Culicidae)

2016 ◽  
Vol 48 (1) ◽  
pp. 69 ◽  
Author(s):  
Milita Roy ◽  
Soujita Pramanik ◽  
Soumendranath Chatterjee ◽  
Gautam Aditya
Keyword(s):  
Plant Height ◽  
Japanese Encephalitis ◽  
West Bengal ◽  
Rice Fields ◽  
Endemic Region ◽  
Anopheles Subpictus ◽  
Vector Management ◽  
Entomological Monitoring ◽  
Anopheles Barbirostris ◽  
Anopheles Vagus

The mosquito <em>Culex</em> <em>tritaeniorhychus</em> is an established vector of Japanese encephalitis in India and many Asian countries. Entomological monitoring enables estimation of the abundance of the vector mosquitoes and therefore aids in vector management and disease control. In compliance with this proposition, an assessment of the pupal productivity of the mosquito <em>C. tritaeniorhynchus</em> was made from selected rice fields of West Bengal, India. The results are expected to provide the present status of mosquitoes in an endemic region of Japanese encephalitis. In course of sampling of the rice fields, the mosquito <em>C. tritaeniorhyhchus</em> was found in abundance with other mosquitoes like <em>Culex</em> <em>bitaeniorhynchus</em>, <em>Anopheles subpictus, Anopheles vagus, Anopheles barbirostris</em>. Application of multivariate analysis indicated that the plant height, water depth and temperature could explain the variations in the pupal productivity of<em> C. tritaeniorhynchus</em> in rice fields. The correspondence of the immature abundance of <em>C. tritaeniorhynchus</em> with plant height suggests persistence of the population throughout the paddy rice cultivation period. Using the plant height as an indicator, the abundance of the mosquito <em>C</em>. <em>tritarniorhynchus</em> can be predicted enabling application of appropriate strategies for population intervention and thus the possibility of the disease.

Lepiotaceous fungi of West Bengal, India: the genus Chlorophyllum

Phytotaxa ◽  
2020 ◽  
Vol 451 (2) ◽  
pp. 113-131
Author(s):  
ARUN KUMAR DUTTA ◽  
SOUMILI BERA ◽  
SOUMITRA PALOI ◽  
SHOVAN RAKSHIT ◽  
ENTAJ TARAFDER ◽  
...  
Keyword(s):  
New Species ◽  
Related Species ◽  
West Bengal ◽  
The State ◽  
Morphological Description ◽  
Germ Pore ◽  
Dichotomous Key ◽  
Molecular Studies ◽  
Description Field ◽  
Lepiotaceous Fungi

The state West Bengal, India was thoroughly investigated and a total of ten specimens belonging to the genus Chlorophyllum was collected. Detailed morphological and molecular studies revealed that the collected specimens were distributed over three species among which two viz. Chlorophyllum hortense and C. molybdites were previously known from the region, and one, Chlorophyllum squamulosum sp. nov., is described herein as new to science. The new species is distinguished by its small plate-like squamules over the pileus coloured greyish brown to reddish brown or dark brown; truncate, hyaline basidiospores with a prominent germ-pore; relatively small (17–25 × 7.5–11.5 μm), clavate or spheropedunculate cheilocystidia; and a tightly packed hymeniderm type pileus covering. A comprehensive morphological description, field photographs of the basidiocarps, comparisons with phenotypically similar and phylogenetically related species and a phylogram showing the placement of each of the collected species are provided. Besides, earlier records of Chlorophyllum species from West Bengal as well as in India are consulted and information related to diversity of the genus in the country are discussed with notes on the previous records. An artificial dichotomous key is provided to aid in the identification of the presently available Chlorophyllum species in India.

An investigation on in vitro propagation of Colchicum luteum and its evaluation of colchicine for the economic benefit of rural people in West Bengal

Planta Medica ◽  
2007 ◽  
Vol 73 (09) ◽  
Author(s):  
M Gangopadhyay ◽  
R Bhattacharya ◽  
D Chakraborty ◽  
S Bhattacharya ◽  
A Mitra ◽  
...  
Keyword(s):  
Economic Benefit ◽  
In Vitro Propagation ◽  
West Bengal ◽  
Rural People

Forecasting of Summer Monsoon Rainfall over Gangetic West Bengal, India Utilising Intrinsic Mode Functions, Linear and Neural Regression

2020 ◽  
Vol 12 (1) ◽  
pp. 60-69 ◽  
Author(s):  
Pijush Basak
Keyword(s):  
Neural Network ◽  
West Bengal ◽  
Monsoon Rainfall ◽  
Linear Part ◽  
Intrinsic Mode Functions ◽  
Quasi Biennial Oscillation ◽  
Nonlinear Part ◽  
South West ◽  
South West Monsoon ◽  
West Monsoon

The South West Monsoon rainfall data of the meteorological subdivision number 6 of India enclosing Gangetic West Bengal is shown to be decomposable into eight empirical time series, namely Intrinsic Mode Functions. This leads one to identify the first empirical mode as a nonlinear part and the remaining modes as the linear part of the data. The nonlinear part is modeled with the technique Neural Network based Generalized Regression Neural Network model technique whereas the linear part is sensibly modeled through simple regression method. The different Intrinsic modes as verified are well connected with relevant atmospheric features, namely, El Nino, Quasi-biennial Oscillation, Sunspot cycle and others. It is observed that the proposed model explains around 75% of inter annual variability (IAV) of the rainfall series of Gangetic West Bengal. The model is efficient in statistical forecasting of South West Monsoon rainfall in the region as verified from independent part of the real data. The statistical forecasts of SWM rainfall for GWB for the years 2012 and 2013 are108.71 cm and 126.21 cm respectively, where as corresponding to the actual rainfall of 93.19 cm 115.20 cm respectively which are within one standard deviation of mean rainfall.

Darwin's two competing phylogenetic trees: marsupials as ancestors or sister taxa?

2012 ◽  
Vol 39 (2) ◽  
pp. 217-233 ◽  
Author(s):  
J. David Archibald
Keyword(s):  
Fossil Record ◽  
Evolutionary Biology ◽  
Phylogenetic Trees ◽  
Charles Darwin ◽  
The Other ◽  
Charles Lyell ◽  
Single Origin ◽  
Molecular Studies ◽  
Richard Owen ◽  
First Time

Studies of the origin and diversification of major groups of plants and animals are contentious topics in current evolutionary biology. This includes the study of the timing and relationships of the two major clades of extant mammals – marsupials and placentals. Molecular studies concerned with marsupial and placental origin and diversification can be at odds with the fossil record. Such studies are, however, not a recent phenomenon. Over 150 years ago Charles Darwin weighed two alternative views on the origin of marsupials and placentals. Less than a year after the publication of On the origin of species, Darwin outlined these in a letter to Charles Lyell dated 23 September 1860. The letter concluded with two competing phylogenetic diagrams. One showed marsupials as ancestral to both living marsupials and placentals, whereas the other showed a non-marsupial, non-placental as being ancestral to both living marsupials and placentals. These two diagrams are published here for the first time. These are the only such competing phylogenetic diagrams that Darwin is known to have produced. In addition to examining the question of mammalian origins in this letter and in other manuscript notes discussed here, Darwin confronted the broader issue as to whether major groups of animals had a single origin (monophyly) or were the result of “continuous creation” as advocated for some groups by Richard Owen. Charles Lyell had held similar views to those of Owen, but it is clear from correspondence with Darwin that he was beginning to accept the idea of monophyly of major groups.

Congress Defeat in West Bengal

1949 ◽  
Vol 18 (15) ◽  
pp. 178-179
Author(s):  
Richard L. Park
Keyword(s):  
West Bengal

Inequality and Radical Land Reform: Some Notes from West Bengal

Asian Survey ◽  
1979 ◽  
Vol 19 (7) ◽  
pp. 718-727 ◽  
Author(s):  
Jnanabrata Bhattacharyya
Keyword(s):  
Land Reform ◽  
West Bengal
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