Observations on the food and feeding habits of the Ttorpedo trevally Megalaspis cordyla (Linnaeus) from Vizhinjam bay

A study of the food and feeding habits of Megalaspis cordyla based on an examination of 1692 specimens revealed that it is a pelagic carnivorous feeder, subsisting mainly on Stolephorus spp.; Leiogiiathus spp., Gazza &p., Carangoides spp., fish juveniles, fish larvae, alima larvae of Squilla spp., Acetes spp., amphipods, Squilla spp., Lucifer spp., megalopa larvae of crab, prawn juveniles, copepods, euphausids, pteropods, Sepia spp., and Nereis spp. were the other food items recorded. The intensity of feeding decreased with advancement of maturity. Feeding was observed to be comparatively higher during night than by day

Seed production technology for edible marine molluscs

One of the major constraints in the mariculture industry is the shortage of seed supply for the farming activities. This fact is applicable to molluscan farming also, because availablity of seed in the wild is severely restricted to few patches and to certain seasons in the natural beds which cannot meet the demand. The'refore need was felt to cllilance the seed supply e'ther by increasing effort for seed collection from the natural beds by identifying areas of abundance or production of seed by hatchery techniques

Metabolic interrelationships of dietary riboflavin and vitamin B<SUB>12</SUB> in the rat

This article does not have an abstract

The influence of folic acid and vitamin B<SUB>12</SUB> on nucleic acid metabolism in microorganisms

This article does not have an abstract

Design and implementation of 9-Level Trinity DC Source inverter using Embedded Controller

Trinary DC source cascaded H-bridge multilevel inverter and the switching pattern scheme is used to improve the performance of Multilevel Inverter (MLI) which reduces the switching losses. The proposed MLI can synthesize high quality output voltage near to sinusoidal waves. This scheme significantly reduces the Total Harmonic Distortion (THD) and switching losses. The circuit configuration is simple and easy to control.  For the developed technique simulations are carried out through MATLAB/SIMULIN

Non-specific cellular uptake of surface-functionalized quantum dots

We report a systematic empirical study of nanoparticle internalization into cells via non-specific pathways. The nanoparticles were comprised of commercial quantum dots (QDs) that were highly visible under a fluorescence confocal microscope. Surface-modified QDs with basic biologically-significant moieties, e.g. carboxyl, amino, streptavidin were used, in combination with the surface derivatization with polyethylene glycol (PEG) in a range of immortalized cell lines. Internalization rates were derived from image analysis and a detailed discussion about the effect of nanoparticle size, charge and surface groups is presented. We find that PEG-derivatization dramatically suppresses the non-specific uptake while PEG-free carboxyl and amine functional groups promote QD internalization. These uptake variations displayed a remarkable consistency across different cell types. The reported results are important for experiments concerned with cellular uptake of surface-functionalized nanomaterials, both when non-specific internalization is undesirable and also when it is intended for material to be internalized as efficiently as possible. Published article at: http://iopscience.iop.org/0957-4484/21/28/285105/Comment: 14 pages 7 figure

Potentialities of Muttukadu mariculture farm for green mussel culture

Experimental trials were conducted for the culture of green mussel (Perna viridis) at Muttukadu Mariculture Farm of CMFRI located near Madras using Pole culture and Bag culture methods.Studies based on the growth and production potential revealed that the location is highly suitable for green mussel mariculture