Temperature discrimination, behavioral thermoregulation and related measures in the rat Final report

Hyperthermia, dietary, and desalivation effects on thermoregulation in rat

Complementary Roles of Hippocampus and Medial Entorhinal Cortex in Episodic Memory

Spatial mapping and navigation are figured prominently in the extant literature that describes hippocampal function. The medial entorhinal cortex is likewise attracting increasing interest, insofar as evidence accumulates that this area also contributes to spatial information processing. Here, we discuss recent electrophysiological findings that offer an alternate view of hippocampal and medial entorhinal function. These findings suggest complementary contributions of the hippocampus and medial entorhinal cortex in support of episodic memory, wherein hippocampal networks encode sequences of events that compose temporally and spatially extended episodes, whereas medial entorhinal networks disambiguate overlapping episodes by binding sequential events into distinct memories.National Institute of Mental Health Grants (MH51570, MH071702); National Science Foundation (Science of Learning Center grant SBE-0354378

Tunable Double Negative Band Structure from Non-Magnetic Coated Rods

A system of periodic poly-disperse coated nano-rods is considered. Both the coated nano-rods and host material are non-magnetic. The exterior nano-coating has a frequency dependent dielectric constant and the rod has a high dielectric constant. A negative effective magnetic permeability is generated near the Mie resonances of the rods while the coating generates a negative permittivity through a field resonance controlled by the plasma frequency of the coating and the geometry of the crystal. The explicit band structure for the system is calculated in the sub-wavelength limit. Tunable pass bands exhibiting negative group velocity are generated and correspond to simultaneously negative effective dielectric permittivity and magnetic permeability. These can be explicitly controlled by adjusting the distance between rods, the coating thickness, and rod diameters

Appraisal of a semi intensive prawm farm at Kanjramkudi, Ramanathapuram

Based on background Information eind analyses of data collected, the farm appears to be a well maintained and well managed one. However, a serious disease problem was reported in a feirm about 3 km away, where the same creek water was used. Arun Aqua Farm stopped pumping water for a few days to prevent introduction of the pathogens. They were also advised to reduce feeding and operate paddle wheel aerators more frequentl

Isolation and application of marine natural products

The marine bioactive compounds or Marine natural products (MNPs) offer avenues for developing cost-effective, safe and potent novel drugs and other useful products. MNPs are organic compounds produced by microbes, sponges, seaweeds, and other marine organisms. The host organism biosynthesizes these compounds as non-primary or secondary metabolites to protect themselves and to maintain homeostasis in their environment. In the decade from 1977 to 1987, around 2500 new metabolites (MNPs) were reported from marine organisms ranging from microbes to fish. According to Dr. S.Z. Qasim, less than 1.0% of the total marine organisms have only been examined for MNPs research. Perusal of literature indicated that even the seawater has bactericidal properties. This could be attributed to the production of antibiotics by planktonic algae and bacteria respectively. Considering such vast resource, holistic approach of pharmacological research has to be given to develop potent therapeutics

Studies on the culture of Heteropneustes fossilis in cages

Emphasis is being given nowadays to increase the unit area production by way of improved intensive culture methods. To this direction, the system of culturing fish in cages has gained much importance (Natarajan, 1976)

Shrimp diseases and control

Shrimp farming has become a highly competitive and lucrative venture all along the coasts oflndia (MPEDA, 1993) and in many of the Asian countries (Subasinghe and Shariff, 1994) in the recent past. Emphasis is given to enhance the unit area production by semi-intensive and intensive shrimp culture techniques which include high density stocking, fertilising and feeding. The results of experiments on intensive culture of shrimps indicate that their production could surpass the production of crops or fish to many folds

Fish fauna of Tripura

The ichthyofauna collected from the sub Himalayan region of Tripura from 1976 to 1981 reveals the presence of 93 species of fish belong to 26 families and 11 orders. Among these Rasbora elanga (Ham), Lobeo nandina (Ham), Lepidocephaius berdmorei (Ham), Somilepteus gongota (Ham), Glyptothorax cavia (Ham), Glyptothorax telchilta (Ham), Hara hara (Ham) and Apocryptes balo (C and V) have been recorded for the first time. Common names of many fishes and location of collection with, notes on new occurrences are given