scispace - formally typeset
Search or ask a question
Institution

Jawaharlal Nehru University

EducationNew Delhi, India
About: Jawaharlal Nehru University is a education organization based out in New Delhi, India. It is known for research contribution in the topics: Population & Candida albicans. The organization has 6082 authors who have published 13455 publications receiving 245407 citations. The organization is also known as: JNU.


Papers
More filters
Journal ArticleDOI
TL;DR: Results from extensive Monte Carlo simulations of domain growth in ferromagnets and binary mixtures with quenched disorder show excellent agreement with the predicted dependence of theta(T, epsilon), which depends on the quench temperature T and the disorder amplitude Epsilon.
Abstract: We present results from extensive Monte Carlo (MC) simulations of domain growth in ferromagnets and binary mixtures with quenched disorder. These are modeled by the random-bond Ising model and the dilute Ising model with either nonconserved (Glauber) spin-flip kinetics or conserved (Kawasaki) spin-exchange kinetics. In all cases, our MC results are consistent with power-law growth with an exponent theta(T, epsilon) which depends on the quench temperature T and the disorder amplitude epsilon. Such exponents arise naturally when the coarsening domains are trapped by energy barriers that grow logarithmically with the domain size. Our MC results show excellent agreement with the predicted dependence of theta(T, epsilon).

65 citations

Journal Article
TL;DR: Apart from the controversy over the possible health effects due to the non-thermal effect of electromagnetic fields the electromagnetic interaction of portable radio waves with human head needs to be quantitatively evaluated.
Abstract: Existence of low level electromagnetic fields in the environment has been known since antiquity and their biological implications are noted for several decades. As such dosimetry of such field parameters and their emissions from various sources of mass utilization has been a subject of constant concern. Recent advancement in mobile communications has also drawn attention to their biological effects. Hand held children and adults alike generally use mobile sources as cordless phones in various positions with respect to the body. Further, an increasing number of mobile communication base stations have led to wide ranging concern about possible health effects of radiofrequency emissions. There are two distinct possibilities by which health could be affected as a result of radio frequency field exposure. These are thermal effects caused by holding mobile phones close to the body and extended conversations over a long period of time. Secondly, there could be possibly non thermal effects from both phones and base stations whereby the affects could also be cumulative. Some people may be adversely affected by the environmental impact of mobile phone base stations situated near their homes, schools or any other place. In addition to mobile phones, appliances like microwave oven etc are also in increasing use. Apart from the controversy over the possible health effects due to the non-thermal effect of electromagnetic fields the electromagnetic interaction of portable radio waves with human head needs to be quantitatively evaluated. Relating to this is the criteria of safe exposure to the population at large. While a lot of efforts have gone into resolving the issue, a clear picture has yet to emerge. Recent advances and the problems relating to the safety criteria are discussed.

65 citations

Journal ArticleDOI
TL;DR: The study investigated the levels of organochlorine pesticides (OCPs) in different types of vegetables grown in periurban area of National Capital Region (NCR), India and found that most of the OCP residues recorded in vegetable samples exceeded the maximum residue levels set by international and national regulatory agencies.
Abstract: The study investigated the levels of organochlorine pesticides (OCPs) in different types of vegetables grown in periurban area of National Capital Region (NCR), India. Vegetable sampling was carried out in winter and summer season of 2012. A total of 20 different OCPs were determined using gas chromatography (GC) assembled with electron capture detector (ECD). Obtained results showed that average levels of ∑20OCP ranged from 83.8 ± 25.5 ng g−1 in smooth gourd to 222.4 ± 90.0 ng g−1 in cauliflower. The mean concentrations of different OCPs were observed in order of ∑HCH > ∑CHLs > drins > ∑endosulfan > ∑DDT in all vegetables except in brinjal and smooth gourd. Most of the OCP residues recorded in vegetable samples exceeded the maximum residue levels (MRLs) set by international and national regulatory agencies. Health risk assessment suggests that daily dietary OCP exposure via vegetable consumption was higher for children (mean value 4.25E−05) than adults (mean value 2.19E−05). The hazard quotient (HQ) and lifetime cancer risk (LCR) estimated from dietary exposure of these vegetables were above the acceptable limit and can be considered as a serious concern for Delhi population.

65 citations

Journal ArticleDOI
TL;DR: The basic premise of the paper is that Western medicine's co-opting of specific technologies and materials from other (indigenous) medical traditions, stripped of the original theories underlying their use, has problematic consequences for the practitioners and patients of both source and recipient traditions.

65 citations

Journal ArticleDOI
TL;DR: The results confirm the presence of DNA gyrase in eukaryotes and confer great potential for drug development and organelle DNA replication in the deadliest human malarial parasite, P. falciparum.
Abstract: DNA gyrase, a typical type II topoisomerase that can introduce negative supercoils in DNA, is essential for replication and transcription in prokaryotes. The apicomplexan parasite Plasmodium falciparum contains the genes for both gyrase A and gyrase B in its genome. Due to the large sizes of both proteins and the unusual codon usage of the highly AT-rich P. falciparum gyrA (PfgyrA) and PfgyrB genes, it has so far been impossible to characterize these proteins, which could be excellent drug targets. Here, we report the cloning, expression, and functional characterization of full-length PfGyrB and functional domains of PfGyrA. Unlike Escherichia coli GyrB, PfGyrB shows strong intrinsic ATPase activity and follows a linear pattern of ATP hydrolysis characteristic of dimer formation in the absence of ATP analogues. These unique features have not been reported for any known gyrase so far. The PfgyrB gene complemented the E. coli gyrase temperature-sensitive strain, and, together with the N-terminal domain of PfGyrA, it showed typical DNA cleavage activity. Furthermore, PfGyrA contains a unique leucine heptad repeat that might be responsible for dimerization. These results confirm the presence of DNA gyrase in eukaryotes and confer great potential for drug development and organelle DNA replication in the deadliest human malarial parasite, P. falciparum.

65 citations


Authors

Showing all 6255 results

NameH-indexPapersCitations
Ashok Kumar1515654164086
Rajesh Kumar1494439140830
Sanjay Gupta9990235039
Rakesh Kumar91195939017
Praveen Kumar88133935718
Rajendra Prasad8694529526
Mukesh K. Jain8553927485
Shiv Kumar Sarin8474028368
Gaurav Sharma82124431482
Santosh Kumar80119629391
Dinesh Mohan7928335775
Govindjee7642621800
Dipak K. Das7532717708
Amit Verma7049716162
Manoj Kumar6540816838
Network Information
Related Institutions (5)
University of Delhi
36.4K papers, 666.9K citations

93% related

Banaras Hindu University
23.9K papers, 464.6K citations

91% related

International Institute of Minnesota
17.4K papers, 537.4K citations

90% related

Panjab University, Chandigarh
18.7K papers, 461K citations

90% related

Indian Institute of Science
62.4K papers, 1.2M citations

88% related

Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202385
2022314
20211,314
20201,240
20191,066
20181,012