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  • 11
    Publication Date: 2019-06-28
    Description: Two orbits of the Atmosphere Explorer D yielded data on F region electron irregularities in the high latitude ionosphere. Data were taken with a retarding potential analyzer, an ion drift meter, a low energy electron experiment and a photoelectron spectrometer. Auroral forms were simultaneously visually sighted by DMSP spacecraft. The irregularities were associated with auroral excitation and large structured flow regions. Steep spectra with one-dimensional spectral index values for wavelengths over 1 km were observed in the acceleration region. Large amplitude irregularities appeared in large structured flow regions and displayed shallow spectra, indicating the presence of large power spectral densities at scale lengths of about 100 m. It is suspected that large velocities or shears in the velocities in adjacent precipitation regions cause the F region density perturbations.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research (ISSN 0148-0227); 89; 5554-556
    Format: text
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  • 12
    Publication Date: 2019-07-13
    Description: It is shown that the conflicting equatorial scintillation observations obtained from greatly separated ground stations can be organized in the framework of a longitudinal variation of irregularity occurrence, given satellite-borne, in situ measurements of irregularity amplitude of the global F-region irregularity morphology's general features. High-inclination satellite data are used to delineate the morphological features of the polar cap by means of such a method. The lack of diurnal and magnetic control of the irregularity morphology within the low solar flux, northern winter polar cap distinguishes this region from the auroral oval regime. A polar-orbiting communication system sensitive to phase perturbations may observe large differences in the phase-to-amplitude scintillation ratio, as it traverses the auroral oval and proceeds into the polar cap, with its sun-aligned arc system.
    Keywords: GEOPHYSICS
    Type: Symposium on the Effect of the Ionosphere on Radiowave Systems; Apr 14, 1981 - Apr 16, 1981; Washington, DC
    Format: text
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  • 13
    Publication Date: 2019-07-13
    Description: The technique of modelling equatorial phase and amplitude scintillations from in-situ measurements of irregularity amplitude, ambient ionization density and irregularity power spectrum is outlined. The in-situ measurements do not directly provide information on irregularity layer thickness for which radar backscatter observations are utilized. The equatorial scintillation models developed from OGO-6 and AE-C in-situ measurements during the two solstices are presented. Considerable differences in the longitude variation of scintillations are predicted during the two solstices. The model estimates are in good agreement with the available ground based phase and amplitude measurements. Problems associated with the use of bottomside spread-F data for transionospheric propagation modelling at VHF/UHF are also discussed.
    Keywords: GEOPHYSICS
    Type: Low latitude aeronomical processes; May 29, 1979 - Jun 09, 1979; Bangalore; India
    Format: text
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  • 14
    Publication Date: 2019-07-12
    Description: Multisatellite scintillation observations and spaced receiver drift measurements are presented for a category of equatorial F region plasma irregularities characterized by nearly sinusoidal waveforms in the ion number density. The observations were made at Huancayo, Peru, and the measurements at Ancon, Peru, associated with irregularities observed by the Atmospheric-Explorer-E satellite on a few nights in December 1979. Utilizing ray paths to various geostationary satellites, it was found that the irregularities grow and decay almost simultaneously in long-lived patches extending at least 1000 km in the east-west direction.
    Keywords: GEOPHYSICS
    Type: AD-A164917 , AFGL-TR-86-0039 , Journal of Geophysical Research (ISSN 0148-0227); 91; 270-276
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  • 15
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    In:  http://aquaticcommons.org/id/eprint/16335 | 12051 | 2015-03-28 14:10:05 | 16335 | Indian Fisheries Association
    Publication Date: 2021-07-03
    Description: Minced fish prepared from the fillets of the sciaenid fish (Lutjanus sp.) was washed with cold water (〈10 °C) three times. The washed muscle was pressed through a piece of fine cloth to a moisture content around 80%. The pressed cake (Surimi) was ground with 2.5% sodium chloride and 3% tapioca starch. The mixed material was shaped in the form of a cake and left for one hour for the gel to set. The cakes were then steamed. The cooled cakes were cut into pieces of 1 cm length x 1 cm width x 0.5 cm thick. The pieces were either dried in an electrical oven at 50°C or dried in sun to a moisture content of 11-12%. Biochemical, bacteriological and organoleptic evaluation revealed that the cakes were in very good acceptable form for 8 months. The cakes could be rehydrated by soaking in water at ambient temperature for half an hour and boiling in water for 10 minutes.
    Keywords: Biology ; processing fishery products ; minced products ; Lutjanus sp. ; sciaenid fishes
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 87-90
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  • 16
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    In:  http://aquaticcommons.org/id/eprint/16549 | 12051 | 2015-11-04 15:07:23 | 16549 | Indian Fisheries Association
    Publication Date: 2021-07-06
    Description: To overcome the problem of underutilization of marine by-catches, Basu et al. (1985) developed fish cube from minced fish meat. Although the product was acceptable, it had little rubbery texture. An attempt was made to improve the texture of the cake by several methods. It was found that 5% tapioca starch along with 3% texturised soybean protein improved the texture and juiciness of the rehydrated product. Preheating of the minced meat at 70°C for 30 minutes also improved the texture appreciably. It was also found that mixing of the ingredients at low speed (less than 100 rpm) in a dough mixer gave the best texture, higher speed and sharp blades leading to rubbery texture. The dehydrated product (moisture 19-20%) thus prepared had a shelf life of six months at ambient temperature.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Fisheries ; minced fish meat ; fish cubes ; dried fish cakes ; rehydration process ; processing fishery products ; India
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 127-131
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  • 17
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    In:  http://aquaticcommons.org/id/eprint/16579 | 12051 | 2015-04-08 18:54:06 | 16579 | Indian Fisheries Association
    Publication Date: 2021-07-07
    Description: Prawn pickle was produced using smaller variety of prawn. Vinegar and salt was used to preserve the prawn muscle against spoilage. Different spices were used to get desired attractive flavour. Benzoic acid to the extent of 200 ppm was used as preservative. Several trials were carried out using different amounts of spices and different methods of preparation. After each trial the sample was subjected to sensory evaluation by judges consisting of five members who had previous experience of acting as panel members. Several trials were carried out to arrive at a final recipe as judged best by the taste panel. Utilizing this final recipe, a product was prepared and subjected to biochemical, bacteriological and organoleptic evaluation and found to be quite acceptable after seven months of storage in glass jar at ambient temperature. The product was subjected to large scale consumer acceptance trial involving 140 consumers, 42% of them ranked it excellent, 41% rated very good, 12% rated good while 5% of the consumers rated it as average.
    Keywords: Fisheries ; pickling ; prawn ; clams ; mussels ; shellfishes ; fishes ; processing fishery products ; storage methods ; storage effects ; organoleptic characteristics
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 105-111
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  • 18
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    In:  http://aquaticcommons.org/id/eprint/16592 | 12051 | 2015-04-08 18:51:13 | 16592 | Indian Fisheries Association
    Publication Date: 2021-07-07
    Description: The ink of the Indian squid Loligo duvauceli (d'Orbigny) was tested for antibacterial activity. The antibacterial effect of bacteria present in the ink gland was also tested. Only one type of bacteria was found to be present in the ink gland of squid and was identified as Photobacterium leiognathi. Among the various forms of ink extracts, the precipitated and freeze-dried ink showed more pronounced antibacterial effect against Gram-negative bacteria, Salmonella, spp. Escherichia coli, Vibrio cholerae, V. parahaemolyticus and Pseudoinonas spp., and a less pronounced effect against Gram-positive bacteria, Staphylococcus spp. and Micrococcus spp., P. leiognathi did not inhibit any of the above bacteria. The antibacterial activity was associated with the compounds of the ink.
    Keywords: Biology ; Cephalopods ; Loligo duvauceli ; Indian squids ; squid ink ; antibacterial activity ; biochemical tests
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 65-69
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  • 19
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    In:  http://aquaticcommons.org/id/eprint/16624 | 12051 | 2015-04-09 12:33:15 | 16624 | Indian Fisheries Association
    Publication Date: 2021-07-07
    Description: A value-added extruded fish product was prepared with corn flour (80%) and fish (sciaenid) powder (20%), using a twin-screw extruder. The effect of different parameters like moisture, temperature, fish powder concentration, speed of the extruder and die-diameter on expansion ratio and crisp texture were studied. The storage characteristics of the final product were studied using three different types of packaging under nitrogen flushing. The study revealed that aluminum foil is the best packaging material to keep the product acceptable for more than three months.
    Keywords: Fisheries ; processing fishery products ; storage characteristics ; extruded fish products ; minced products ; storage life ; packing materials
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 149-156
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  • 20
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    In:  http://aquaticcommons.org/id/eprint/16626 | 12051 | 2015-04-09 12:32:40 | 16626 | Indian Fisheries Association
    Publication Date: 2021-07-07
    Description: Fresh Rastrelliger kanagurta (Indian mackerel) was thoroughly washed, eviscerated, cleaned and salted overnight with dry salt (fish : salt
    Keywords: Fisheries ; processing fishery products ; storage tanks ; storage conditions ; quality control ; solar drier ; fish drying ; Rastrelliger kanagurta ; Indian mackerel
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 165-171
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