Kolkata, India
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Roy S.,se National Center For Basic Science | Roy S.,Saha Institute of Nuclear Physics | Datta P.,IThemba Labs | Datta P.,Ananda Mohan College | And 15 more authors.
Physical Review C - Nuclear Physics | Year: 2010

The level lifetimes have been measured for a shears band of Cd108 that exhibits band crossing. The observed level energies and B(M1) rates have been successfully described by a semiclassical geometric model based on shear mechanism. In this geometric model, the band crossing in the shears band has been described as the reopening of the angle between the blades of a shear. © 2010 The American Physical Society.


Sethi J.,Tata Institute of Fundamental Research | Palit R.,Tata Institute of Fundamental Research | Saha S.,Tata Institute of Fundamental Research | Trivedi T.,Tata Institute of Fundamental Research | And 17 more authors.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2013

The high spin negative parity states of 108Ag have been investigated with the 11B+100Mo reaction at 39 MeV beam energy using the INGA facility at TIFR, Mumbai. From the γ-γ coincidence analysis, an excited negative parity band has been established and found to be nearly degenerate with the ground state band. The spin and parity of the levels are assigned using angular correlation and polarization measurements. This pair of degenerate bands in 108Ag is studied using the recently developed microscopic triaxial projected shell model approach. The observed energy levels and the ratio of the electromagnetic transition probabilities of these bands in this isotope are well reproduced by the present model. Further, it is shown that the partner band has a different quasiparticle structure as compared to the yrast band. © 2013 Elsevier B.V.


Patra B.,Ananda Mohan College | Patra B.,University of Calcutta | Bera S.,University of Calcutta | Mehltreter K.,Institute Ecologia
Journal of Plant Interactions | Year: 2010

We studied the structure of newly found entomogenous galls in three Indian species of Selaginella, and the biochemical changes during gall development as well as their seasonal abundances in 10 squares of 1.5 m2 under two differing habitat conditions, open and covered. Adult wasps (Cynipidae) initiate two types of gall formation by oviposition, spherical galls on vegetative shoots and elongated, club-shaped strobilar galls on reproductive shoots. Galls are anatomically and biochemically different from the unaffected shoots. Vegetative shoot apices bear more galls (84.6%) than reproductive shoot apices (15.4%). Gall frequency is significantly higher in covered (94.8%) than in open habitat (5.2%), and its seasonal peak occurs earlier in the former (43.1% during the rainy season) than in latter habitat (52.8% in autumn). We discuss the relationship between relative species density and gall seasonality as well as the possible role of certain environmental factors that make covered habitats more favorable to the gall inducer. © 2010 Taylor & Francis.


Ghosh S.,University of Calcutta | Chakraborty I.,University of Calcutta | Chakraborty M.,Indian Institute of Technology Kharagpur | Mukhopadhyay A.,Bose Institute of India | And 3 more authors.
Biochimica et Biophysica Acta - Biomembranes | Year: 2016

Erythrocyte morphology is gaining importance as a powerful pathological index in identifying the severity of any blood related disease. However, the existing technique of quantitative microscopy is highly time consuming and prone to personalized bias. On the other hand, relatively unexplored, complementary technique based on flow cytometry has not been standardized till date, particularly due to the lack of a proper morphological scoring scale. In this article, we have presented a new approach to formulate a non-empirical scoring scale based on membrane roughness (Rrms) data obtained from atomic force microscopy. Subsequently, the respective morphological quantifier of the whole erythrocyte population, commonly known as morphological index, was expressed as a function of highest correlated statistical parameters of scattered signal profiles generated by flow cytometry. Feed forward artificial neural network model with multilayer perceptron architecture was used to develop the intended functional form. High correlation coefficient (R2 = 0.95), even for model-formulation exclusive samples, clearly indicates the universal validity of the proposed model. Moreover, a direct pathological application of the proposed model has been illustrated in relation to patients, diagnosed to be suffering from a wide variety of cancer. © 2016 Elsevier B.V. All rights reserved.


Roy S.,Saha Institute of Nuclear Physics | Roy S.,se National Center For Basic Science | Chattopadhyay S.,Saha Institute of Nuclear Physics | Datta P.,Ananda Mohan College | And 11 more authors.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2011

A model based on classical particle plus rotor has been used to explore the underlying systematics of even-even Cd isotopes and a self consistent picture for the observed behaviors of 106,108,110Cd has been reported. This systematic study also helps to estimate the strengths of particle-hole and hole-hole interactions of this mass region. © 2010 Elsevier B.V.


Rather N.,Saha Institute of Nuclear Physics | Datta P.,Ananda Mohan College | Chattopadhyay S.,Saha Institute of Nuclear Physics | Rajbanshi S.,Saha Institute of Nuclear Physics | And 11 more authors.
Physical Review Letters | Year: 2014

The lifetimes of the excited levels for the two nearly degenerate bands of Ag106 have been measured using the Doppler-shift attenuation method. The deduced B(E2) and B(M1) rates in the two bands are found to be similar, except around the band crossing spin, while their moments of inertia are quite different. This is a novel observation for a nearly degenerate doublet band. © 2014 American Physical Society.


Rather N.,Saha Institute of Nuclear Physics | Roy S.,Tata Institute of Fundamental Research | Datta P.,Ananda Mohan College | Chattopadhyay S.,Saha Institute of Nuclear Physics | And 8 more authors.
Physical Review C - Nuclear Physics | Year: 2014

The electric quadrupole transition rates for the high-spin yrast states of 104Pd have been measured by using the Doppler-shift attenuation method. These values decrease with the increase of angular momentum, which can be associated with the phenomenon of antimagnetic rotation. In the present work, a numerical calculation based on the semiclassical particle plus rotor model for antimagnetic rotation has been employed, giving a good description of the experimental Routhian and the transition rates and providing conclusive evidence of antimagnetic rotation in a nucleus other than cadmium. © 2014 American Physical Society.


Sarker B.C.,University of Dhaka | Sarker B.C.,Ananda Mohan College | Karmoker J.L.,University of Dhaka | Rashid P.,University of Dhaka
Bangladesh Journal of Botany | Year: 2010

Anatomical response of maize (ZEA MAYS L.) to phosphorus deficiency grown in sand culture and half strength Hoagland solution revealed that phosphorus deficiency caused a decrease in diameter of the root and stem as well as thickness of the leaf. Epidermal cells of the root, stem and leaf became thickened, cortical zone of root and stem was reduced, endodermal and pericycle cells became smaller and thick walled in phosphorus deficient plants. The prominent structural changes due to phosphorus deficiency occurred in the vascular system where the vascular area is decreased with less number of xylem vessels and smaller size of the cavity. Phosphorus deficiency also resulted in decreased number and smaller sized stomata in leaves.


Datta P.,Ananda Mohan College | Roy S.,Saha Institute of Nuclear Physics | Chattopadhyay S.,Saha Institute of Nuclear Physics
AIP Conference Proceedings | Year: 2014

At IUAC-INGA, our group has studied four neutron rich nuclei of mass-110 region, namely 109,110Ag and 108,110Cd. These nuclei provide the unique platform to study the interplay between Tilted and Principal axis rotation since these are moderately deformed and at the same time, shears structures are present at higher spins. The salient features of the high spin behaviors of these nuclei will be discussed which are the signatures of this interplay. © 2014 AIP Publishing LLC.


Banu-Fattah K.,Ananda Mohan College | Sarker S.K.,Ananda Mohan College
Bangladesh Journal of Plant Taxonomy | Year: 2010

The greater Mymensingh district of Bangladesh, particularly the hilly areas are rich in Bryophyte flora. The present paper on class Hepaticopsida (Liverworts) and Anthocerotopsida (Hornworts) represents primary as well as secondary data collection and includes an account of 48 species under 12 genera, nine families and four orders. An alphabetic arrangement of taxa with short description, habitats, localities, names of collectors with dates and collection numbers are provided. © 2010 Bangladesh Association of Plant Taxonomists.

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