DRS at CSIR-National Institute of Oceanography: Recent submissions
Now showing items 5101-5120 of 9513
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Pseudo sidescan images from backscatter amplitude data of the Hydrosweep multibean sonar system
(NISCAIR, CSIR, 1997)Using the rms (root mean square) backscatter amplitude values, a procedure was evolved to generate pseudo sidescan images. A comparison of the pseudo sidescan image with actual Hydrosweep sidescan image, from an area ... -
Location of marine outfall and design of diffuser for a shore based industry off southeast coast of India
(Andhra University, Visakhapatnam, 1997)Disposal of industrial effluent in the sea necessitates exhaustive study on the marine environment and the hydrodynamic behavior of the plume discharge with the ocean. Site specific baseline information on currents, waves, ... -
Reduction in density of suspended - sediment - laden natural waters
(Cent. for Earth Sci. Stud., Cochin (India), 1997)Pressure measurements made in various turbid natural waters have led to the inference that the effective depth-mean in-situ density values peff of these waters are less than (approx equal to 2.70%) their static bulk densities ... -
Acoustic remote sensing of ocean flows
(Narosa, New Delhi (India), 1997)Acoustic techniques have become powerful tools for measurement of ocean circulation mainly because of the ability of acoustic signals to travel long distances in water, and the inherently non-invasive nature of measurement. ... -
Weather station for scientific data collection
(Cent. for Earth Sci. Stud., Cochin (India), 1997)A state of are automatic weather station has been developed primarily to support, research programs on oceanographic and climatic studies. The basic system includes a suite of sensors for measurement of wind velocity, air ... -
Challenges in marine instrumentation
(Cent. for Earth Sci. Stud., Cochin (India), 1997)The problems of ocean science are technology intensive as the area to be surveyed is vast, complex and hostile. The accessibility of most of the areas too, puts severe constraints on the design methodology, specially the ... -
Study of multibeam techniques for bathymetry and seabottom backscatter applications
(Cochin University of Science and Technology, Kochi, 1997)In this paper, a brief discussion is carried out on the application of the different techniques of echosounding. A deteiled appraisal of the presently used multibeam technique is mentioned. Some of the important discoveries ... -
Boron, calcium and magnesium in Kavaratti lagoon water, Lakshadweep Archipelago
(NISCAIR, CSIR, 1997)Analysis of major elements in the water of Kavaratti lagoon show variations in the concentrations of boron from 4.08 to 4.25 mg kg sup(-1) (av. 4.15 mg kg sup(-1)); calcium from 420.4 to 429.3 mg kg sup(-1) (av. 424.79 mg ... -
Bisoxazolinone from the mangrove Acanthus illicifolius
(NISCAIR, CSIR, 1997)Acanthus illicifolius, a mangrove, possessing analgesic and anti-inflammatory activities afford a dimeric oxazolinone, 5,5' bis-benzoxazoline-2,2'-dione. Its structure has been elucidated on the basis of detailed spectroscopic ... -
Secondary metabolites from the sponge Tedania anhelans: Isolation and characterization of two novel pyrazole acids and other metabolites
(American Chemical Society, 1997)Chemical investigation of the methanol extract of the sponge Tedania anhelans yielded the two unusual heteroaromatic acids, pyrazole-3(5)-carboxylic acid (2) and 4-methylpyrazole-3(5)-carboxylic acid (3), which are reported ... -
Chlorophyll 'a' and particulate organic carbon in relation to some physico-chemical parameters along southwest coast of India
(Marine Biological Association of India, 1997)Chlorophyll 'a', Particulate Organic Carbon and other environmental parameters were studied along Kerala Coast during October 1987 and 1988. High chlorophyll 'a' content at surface water and decreasing trend towards offshore ... -
Corrosion aspects of shipwreck metals of Lakshadweep waters
(NIO, Dona Paula, Goa, India, 1997) -
Antispasmodic action of 5-methyl benzoxazoline-2-one: A preliminary study
(Indian Pharmacological Society, 1997)In the present study, compound (1) depressed both phases of the dose-response curve. The marked effect on 5-HT response cannot be attributed solely to an antimuscarinic action of the compound which was much less (66%) as ... -
Contamination of organochlorine pesticides in sediments from the Arabian Sea along the west coast of India
(Pergamon, 1997)The levels of contamination of various organochlorine pesticides in HCHs, DDTs aldrine dieldrin and endrin were determined in marine and estuarine sediments along the west coast of India. The concentration of various ... -
Heavy metals in fishes from coastal waters of Cochin, southwest coast of India
(NISCAIR, CSIR, 1997)The concentration levels of copper, zinc, manganese and iron have been determined in marine fishes from Cochin area which is one of the major fishing zones along the west coast of India. The concentration of heavy metals ... -
Biogenic silica in the Bay of Bengal during the southwest monsoon
(Ifremer/ CNRS/ IRD/ Editions scientifiques et medicales Elsevier SAS. Tous droits reserves, 1997) -
Effects of petroleum hydrocarbons on the growth of a microalga, Isochrysis sp. (Chrysophyta)
(NISCAIR, CSIR, 1997)Effects of water soluble fraction of Bombay High crude oil and heavy duty marine diesel on the growth of a microalga were examined and compared. Most concentrations of the oil depressed the growth rate in Isochrysis sp. ... -
Screening of some marine plants for activity against marine fouling bacteria
(Walter de Gruyter, Berlin, 1997) -
Nitrogen and oxygen isotopic composition of N sub(2)O from suboxic waters of the eastern tropical North Pacific and the Arabian Sea - measurement by continuous-flow isotope-ratio monitoring
(Elsevier, 1997)Nitrous oxide (N sub(2)O) is a trace gas that is increasing in the atmosphere. It contributes to the greenhouse effect and influence the global ozone distribution. Recent reports suggest that regions such as the Arabian ... -
Duff reaction on phenols: Characterization of non steam volatile products
(Oriental Scientific Publishing Company, Bhopal, 1997)New products having structures 1 and 2 have been characterized in the Duff reaction thymol arid carvacrol. These products have been identified as 2.6'-dithymylmethane 1 and 5.5' -dicarvacryl methane 2 respectively on the ...

