Critical currents and high temperature superconductors

The experimental information on critical currents and epitaxial thin films of high temperature superconductors is summarized. Experiments carried out to measure critical currents across single grain boundaries are described. A variety of mechanisms responsible for limiting currents in films as well as across grain boundaries are presented and their predictions compared with experimental data

Defects in the Compound Bi2te3 Caused by Irradiation with Protons

Defects in single crystals of bismuth telluride caused by proton irradiatio

Test Experiment for Time-Reversal Symmetry Breaking Superconductivity

A new experiment is proposed to probe the time-reversal symmetry of a superconductor. It is shown that a time-reversal symmetry breaking superconductor can be identified by the observation of a fractional flux in connection with a Josephson junction in a special geometry.Comment: 4 pages, 2 figures available upon request, Revtex, MIT-CMT-OC

Ethnomedicinal Plants Used by Gond Tribe of Bhandara District, Maharashtra in the Treatment of Diarrhoea and Dysentery

This research paper presents the findings of an investigation on traditional remedies of diarrhoea and dysentery among the ethnic group (Gond tribe) in the Bhandara district of Maharashtra state, India. 38 valuable species belonging to 27 families were identified with relevant information and are documented alphabetically in this paper with regard to their botanical name followed by family name, local name, parts used, mode of preparation and medicinal uses

S and D Wave Mixing in High TcT_c Superconductors

For a tight binding model with nearest neighbour attraction and a small orthorhombic distortion, we find a phase diagram for the gap at zero temperature which includes three distinct regions as a function of filling. In the first, the gap is a mixture of mainly $d$-wave with a smaller extended $s$-wave part. This is followed by a region in which there is a rapid increase in the $s$-wave part accompanied by a rapid increase in relative phase between $s$ and $d$ from 0 to $\pi$. Finally, there is a region of dominant $s$ with a mixture of $d$ and zero phase. In the mixed region with a finite phase, the $s$-wave part of the gap can show a sudden increase with decreasing temperature accompanied with a rapid increase in phase which shows many of the characteristics measured in the angular resolved photoemission experiments of Ma {\em et al.} in $\rm Bi_2Sr_2CaCu_2O_8$Comment: 12 pages, RevTeX 3.0, 3 PostScript figures uuencoded and compresse

Genetic diversity among three Indian populations of black tiger shrimp (Penaeus monodon Fabricious, 1798) using microsatellite DNA markers

Genetic variation is an essential factor while selecting superior stocks for breeding programs. Eight microsatellite loci (TUZX pm2.27, TUZX pm2.28, TUZX pm2.36, TUZX pm2.69, TUZX pm4.84, TUZX pm4.87, TUZX pm6.1 and TUZX pm4.9) were used for molecular characterisation of Penaeus monodon collected from three different locations in India, viz., Kakinada and Chennai on the east coast and Mumbai on the west coast and all the loci were found to be highly polymorphic. The number of alleles and genotypes across the loci ranged from 5 to 23 and 42 to 98, respectively. The observed heterozygosity among the populations across the loci ranged from 0 to 0.1678. The overall FST value was found to be 0.021 (<0.05), which implies a low degree of population differentiation in the species. On the basis of pair-wise allelic differentiation and UPGMA dendrogram, the investigated samples from three locations were allocated in to two distinct populations composed of east coast and west coast populations