799 research outputs found
Structural Adjustment, Global Trade and the New Political Economy of Development
No full textBiplab Dasgupta. Structural Adjustment Global Trade and the New Political Economy of Development. New Delhi. Sage Publications. 1998. Price Indian Rupees 450 (hardback). The author has written a very topical book the relevance of which cannot be understated. At the core of the book the author discusses the concept of the new political economy of development which forms the theoretical underpinnings that lie behind the structural adjustment/ stabilisation programmes of the international financial institutions such as the World Bank and the International Monetary Fund. Biplab Dasgupta has very concisely and succinctly analysed the new political economy of development which has, as its centre-piece, a blind faith in the operation of free-market forces. This can be traced back to the Reagan and Thatcher years, which saw a shift away from interventionist policies to allowing the markets to decide
Biplab Majumdar and His Poetry with Special Attention to Cosmic Convergence
No full textBiplab Majumdar is the author of nearly 100 books of poetry, prose, rhyme, translation, novels and short stories. His works are published both in Bengali and English. The contents of this latest volume, Cosmic Convergence, are divided into two parts: Part-A covers the year from January to December and Part-B contains 12 poems on a variety of subjects. The poems are followed by 3 pages of selected comments on Biplab Majumdar’s by a variety of eminent authors. This volume makes possible an assessment of the scope and stature of Majumdar’s work. These poems-often witty and beautiful- are an achievement, a testament to Majumdar’s ongoing power to engage us in his vision. They confirm Majumdar’s reputation as one of India’s finest poets. From evocations of the daily wonders of life to explorations of spirituality, feelings and sensibilities. His celebration of idiom and understanding of the modern mind may help us to understand ourselves
Structural, electronic and magnetic properties of YMnO3/La0.7Sr0.3MnO3 heterostructures
No full textHeterostructures with competing magnetic interactions are often exploited for their tailored new functionalities. Exchange bias is one such outcome of interfacial coupling across ferromagnetic-antiferromagnetic, multiferroic-ferromagnetic, two antiferromagnetic, or antiferromagnetic and paramagnetic interfaces. Apart from the usual horizontal shift of the hysteresis loop (exchange bias shift), a small `vertical shift´ of the hysteresis loops along the magnetization axis has also been seen, but it was always relatively small. Recently, an unusually large `vertical shift´ in epitaxial bilayer heterostructures comprising ferromagnetic La0.7Sr0.3MnO3 and multiferroic orthorhombic YMnO3 layers was reported. Here, using polarized neutron reflectometry, the magnetic proximity effect in such bilayers has been investigated. A detailed magnetic depth profile at the interface, elucidating the intrinsic nature of the vertical shift in such heterostructures, is reported. Further corroboration of this observation has been made by means of first-principles calculations, and the structural and electronic properties of YMnO3/La0.7Sr0.3MnO3 heterostructures are studied. Although in the bulk, the ground state of YMnO3 is an E-type antiferromagnet, the YMnO3/La0.7Sr0.3MnO3 heterostructure stabilizes the ferromagnetic phase in YMnO3 in the interface region. It is found that, in the hypothetical ferromagnetic phase of bulk YMnO3, the polarization is suppressed, and owing to a large difference between the lattice constants in the ab plane a strong magnetocrystalline anisotropy is present. This anisotropy produces a high coercivity of the unusual ferromagnetic YMnO3 phase at the interface, which is responsible for the large vertical shift observed in experiment.Fil: Paul, Amitesh. Technische Universitat Munchen; AlemaniaFil: Zandalazini, Carlos Ivan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina. University of Leipzig; AlemaniaFil: Esquinazi, Pablo. University Of Leipzig; AlemaniaFil: Autieri, Carmine. Uppsala University. Department Of Physics And Astronomy; SueciaFil: Sanyal, Biplab. Uppsala University. Department Of Physics And Astronomy; SueciaFil: Korelis, Panagiotis. Paul Scherrer Institut; SuizaFil: Böni, Peter. Technische Universitat Munchen; Alemani
Macroanatomy and 3-dimensional modeling of the tentacular head of Phascolosoma arcuatum (Grey, 1828)
No full textAbstract: The macroanatomy of the tentacular head of Phascolosoma arcuatum belongs to phylum Sipuncula has been studied under light microscopic methods and computer aided graphics analysis. The tentacular head structure has been reconstructed using computer aided graphics analysis using series histological images on computer aided software platform. The P. arcuatum has only five, semitransparent, pigmented, lobed tentacles in tentacular crown with large tentacular coelomic connections. We found that the tentacles are lined by ciliated columnar epithelium with large number of mucosecretory cells, indicating their deposit feeding habit. Fewer number of tentacles, body wall and there burrowing habit supports there integumentary breathing habit. A thick striated collar encircles the tentacles forming the ventral wall of the mouth channel and protects tentacles from mechanical damage when retracted. These structural peculiarities revealed from macroanatomical analysis are strongly suggestive about the important role of the collar region of the tentacular crown of the head of P. arcuatum in relation to its burrowing habit to its concern habitat.
Keywords: Phascolosoma arcuatum, Deposit feeding, Tentacular Introvert, Anatomical modeling.
Title: Macroanatomy and 3-dimensional modeling of the tentacular head of Phascolosoma arcuatum (Grey, 1828)
Author: Biplab Mahata, Amalesh Choudhury, Subrata Kumar De
International Journal of Life Sciences Research
ISSN 2348-313X (Print), ISSN 2348-3148 (online)
Vol. 6, Issue 3, July - September 2018
Page : 294-298
Publisher: Research Publish Journals
Available at: www.researchpublish.com
DOI: https://doi.org/10.5281/zenodo.6523454
Published Date: 20-August-2018
Paper Download Link: https://www.researchpublish.com/upload/book/Macro%20anatomy-6267.pdf
Research Article Details link: https://www.researchpublish.com/papers/macro-anatomy-and-3-dimentional-modeling-of-the-tentacular-head-of-phascolosoma-arcuatum-grey-1828International Journal of Life Sciences Research
ISSN 2348-313X (Print), ISSN 2348-3148 (online)
Vol. 6, Issue 3, July - September 2018
Page : 294-298
Publisher: Research Publish Journals
Available at: www.researchpublish.co
Nuclear accumulation of polyadenylated noncoding RNA leads to a breakdown in nuclear RNA homeostasis
No full textThe biogenesis and processing of messenger RNAs (mRNAs) is central to the gene expression program. In eukaryotic cells, mRNAs must also be exported from nucleus to cytoplasm as part of the gene expression pathway. In this work, mutations in 1047 essential genes of Saccharomyces cerevisiae (S. cerevisiae) were screened for defects in mRNA export resulting in the identification of 26 mRNA export mutants. Single molecule fluorescent in situ hybridization (smFISH) experiments further showed that these mutants accumulated mRNAs within specific regions of the nucleus, which included: (1) transcripts enriched near nuclear pore complexes when components of the mRNA export apparatus were mutated, (2) build-up of mRNAs near transcription sites associated with mutations in genes required for 3′ end processing and chromosome segregation, and (3) mRNAs within the nucleolus when nucleocytoplasmic transport (e.g. srm1-ts), rRNA biogenesis (e.g. enp1-1), or RNA processing and surveillance (e.g. csl4-ph) were disrupted. These data demonstrate that alterations to RNA processing and overall
nuclear function cause RNAs to stall, or be retained, at three distinct restriction points. This may reflect common failures in mRNA biogenesis and export, as well as, active mechanisms to hold mRNAs at discrete locations to protect the cell and fidelity of the gene expression when cells are dysfunctional. The nucleolus is mainly associated with noncoding RNA (ncRNA) processing, raising questions about the exact nature of the accumulated poly(A)-RNA material in csl4-ph, enp1-1,
and srm1-ts strains. Follow up work using RNA-sequencing (RNA-seq) methods showed that these three mutants exhibited significant down regulation of protein-coding transcripts that are
highly expressed under normal steady state growth conditions and exhibited increased levels of pervasive transcripts. Combined RNA-seq, Northern, and RNA binding data, further revealed that the errors in RNA biogenesis in csl4-ph and enp1-1 mutants led to the accumulation of polyadenylated ncRNA species. Loss of Csl4p or Enp1p was also found to result in a poly(A)-RNA binding protein, Nab2p, engaging in a protein interaction network that encompassed ncRNA processing factors. This included Nab2p becoming associated with proteins required for ribosomal RNA (rRNA) and small nucleolar RNA (snoRNA) processing, in contrast to the normal association of Nab2p with mRNA processing factors in a control strain. These data indicate that ncRNAs become stably polyadenylated in csl4-ph and enp1-1 mutants, which leads to the inappropriate association of Nab2p, and other mRNA processing factors, with ncRNAs. In line with this model, overexpression of another poly(A)-RNA binding protein, Pab1p, rescued the poly(A)-RNA accumulation phenotype and improved the growth of the enp1-1 strain at a semipermissive temperature. These findings provide evidence that polyadenylated ncRNAs can sequester mRNA biogenesis and export machinery, which precipitates a breakdown in nuclear homeostasis defined by high levels of nuclear poly(A)-RNA in the nucleolus. A set of events that
can be mitigated by the overexpression of another poly(A)-RNA binding protein.
Overall, these studies have identified essential genes that are required for the maintenance of the gene expression program and provided new insight into nuclear RNA homeostasis. A key
finding is that mutations altering processes not directly linked to mRNA biogenesis or export (i.e. Enp1p) have the ability to disrupt gene expression through altering the abundance of functional
RNA-binding proteins. Data that highlights the importance of nuclear surveillance and decay of aberrant RNA species in maintaining nuclear RNA homeostasis and proper cellular function
GROWTH OF PETERSSON INNER PRODUCTS OF FOURIER-JACOBI COEFFICIENTS OF SIEGEL CUSP FORMS (Analytic, geometric and -adic aspects of automorphic forms and -functions)
No full textSimple apparatus for the multipurpose measurements of different thermoelectric parameters
No full textON VALUES OF LOGARITHMIC DERIVATIVES OF -FUNCTIONS (Problems and Prospects in Analytic Number Theory)
No full textThis article is an extended version of a talk delivered at RJMS conference on "Problems and Prospects in Analytic Number Theory" held in November, 2020. In this note, we give a brief overview of the theme 'values of logarithmic derivatives of £-functions and zeta functions and its related topics'. We end by providing an outline of a recent work on values of logarithmic derivatives of £-functions attached to cuspidal elliptic Hecke eigenforms of integral weight
On Hecke eigenvalues of Siegel modular forms in the Maass space
No full textAbstractIn this article, we prove an Omega result for the
Hecke eigenvalues {\lambda_{F}(n)} of Maass forms F
which are Hecke eigenforms in the space of Siegel
modular forms of weight k, genus two for
the Siegel modular group {Sp_{2}({\mathbb{Z}})}.
In particular, we prove\lambda_{F}(n)=\Omega\biggl{(}n^{k-1}\exp\biggl{(}c\frac{\sqrt{\log n}}{\log%
\log n}\biggr{)}\biggr{)},when {c>0} is an absolute constant.
This improves the earlier result\lambda_{F}(n)=\Omega\biggl{(}n^{k-1}\biggl{(}\frac{\sqrt{\log n}}{\log\log n}%
\biggr{)}\biggr{)}of Das and the third author. We also show that
for any {n\geq 3}, one has\lambda_{F}(n)\leq n^{k-1}\exp\biggl{(}c_{1}\sqrt{\frac{\log n}{\log\log n}}%
\biggr{)},where {c_{1}>0} is an absolute constant.
This improves an earlier result of Pitale and Schmidt.
Further, we investigate the limit
points of the sequence
{\{\lambda_{F}(n)/n^{k-1}\}_{n\in{\mathbb{N}}}}
and show that it has infinitely many
limit points. Finally, we show that {\lambda_{F}(n)>0}
for all n, a result proved earlier by
Breulmann by a different technique.</jats:p
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