Anandaraj,N; Seralathan,P(Depatrtment of Marine Geology & Geophysics, Faculty of Marine Sciences, 2002)
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Abstract:
In the present thesis the petrographic, geochemical and digenetic variability of the sediments in the islands of Kavaratti and Minicoy has been investigated .The beach profile studies show that in the Kavaratti lagoon beach, the slope is steeper in the southern and south central part than in the northern end’s marginal deposition is taking place in the northern end of the Kavaratti island, whereas a marginal erosion is observed at the southern end. In Minicoy the slope of the lagoon beach is gentle in the south and is slightly steeper at the northern part of the beach. The southern and northern beach sections show a marginal deposition. Based on the mineralogical and geochemical studies it is concluded that the main digenetic changes observed is the transformation of aragonite to LMC.The transformation takes place mainly in the vadose zone and is caused by the abundance of fresh water infiltration.
Unnikrishnan,P; Muraleedharan Nair,S(Department of Chemical Oceanography, School of Marine Sciences, 2000)
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Abstract:
This thesis is a modest attempt in assessing the trace metal levels and their behavior in the aquatic environment of Kuttanad, an aquatic system that is severely affected by man’s intervention on natural processes, by study seriously evaluating the levels of trace metals in dissolved and particulate phases and also in the different chemical fractions of the sediments. Understanding of the distributions, variations and transfer processes of trace metals in different environmental phases in the backwaters of Kuttanad is vital for the assessment of the water pollution problems and study the ecology of the area which contributes 20% of the rice production in the State of Kerala. Kuttand is a low-lying, shallow bay formed as a result of geological uplift. The major economic activity is agriculture involving 40% of the population. About 1.5% of the people are engaged in aquaculture. The trace metal distribution in the Kuttand backwaters is considerably influenced by the tropical features of the location and by human activities including agricultural activities and construction of salinity barrier. In this study an attempt is made to differentiate the metals in the sediment into exchangeable, reducible and resistant fractions in the sediments.
Sreevalsam,Gopinath; Saramma,A V(Faculty of Marine biology, June 19, 2002)
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Abstract:
This study aims to reveal the ability of bacteria isolated from Cochin estuary and the Arabian Sea to produce phosphatases, important characters of the enzymes, its ability to utilize organophosphorus compounds as source of phosphate and also their role in degradation of organophosphorus pesticides. It deals with isolation, identification and screening of bacteria for phosphatase production, and it describes the effect of cultural conditions on growth and phosphatase production. The effect of various factors like pH, NaCl concentration, temperature of incubation, carbon source, period of incubation etc. on growth and phosphatase production by the two selected species were studied to establish suitable environment for phosphatase production by these bacteria. In this study regulation of phosphatase synthesis, characteristics of acid and alkaline phosphatases are discussed.
Aneeshkumar, N; Dr. Sujatha, C H(Cochin University of Science and Technology, October , 2009)
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Abstract:
We are in the cutting edge of a new era of development without leaving
any promises to next generation. But the scale and size of the problem are only
partially blamed. The juggernaut of Globalisation has trampled upon whatever
little hope we might have had making a quick transition to a less energy –
intensive world. “Environment friendliness begins at home”. Our quest for
productivity and profitability should progress simultaneous with our
cooperative responsibility of leaving behind a clean and green earth for the
generation to come. Climate change is the most pressing global environmental
challenge being faced by humanity, with the quest for better productivity for our
fragile ecosystem. It is too late to rely solely on reduction in Green house gas
emissions to mitigate climate change although this is undoubtedly crucial.
Coastal belts are more prone to these devastating impacts and its protection is an
intensive filed of research. The present study describes how the colourful
Carotenoids and Chlorophylls can be used in rapid hand on tool in conjunction
with molecular biology to open sources and it also explores the fate of organic
matter in the aquatic system and underlying sediments.
Description:
Department of Chemical Oceanography,
Cochin University of Science and Technology
Sreedevi, M G; Dr. Balchand, A N(Cochin University of Science and Technology, February , 2007)
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Abstract:
This thesis attempts to gain insight on the mathematical approach to estuarine
oceanographic systems; also to closely understand the governing processes in the
estuarine environment as well as in the adjoining river reaches.
The main aim was to conduct pollution routing for tropical estuarine environment
namely, for the Cochin estuary. In this context, attempts have been made to apply,
verify and validate the application of models, pre- prepared with necessary
modifications to suit the area of interest by use of RIVMIX and WASP tools.
Finally the thesis concludes by highlighting the advantages and limitations in
modelling water bodies and concurrentlysimulates most of the possible scenarios
within the purview of this work.
Description:
Department of Physical Oceanography,
Cochin University of Science and Technology
Latha Unnikrishnan; Devadasan,K(Central Institute of Fisheries Technology, 2006)
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Abstract:
Polycyclic Aromatic Hydrocarbons and other toxic compounds from industrial effluents are noted for their high potency for skin, lung, bladder and gastrointestinal cancers. Increased industrialization, and population growth led to greater production of wastes, Pesticides and PAHs have received attention due to their carcinogenic effects. The main objectives of the study were; to collect base line data on the concentration of PAHs in seawater and sediment from the west coast of India, the concentration of PAHs in certain species of fishes, the comparative levels of PAHs in fish, the influence of sediment characteristics on the concentration of PAH in sediment, changes in PAH concentration in water, sediment and fish, to provide a base line concentration of trace metals in water, sediment and fish, the seasonal changes in content of selected trace metals in water, sediment and fish from the west coast of India. The present study revealed that a predominance of silt and clay at all stations in the off Cochin area. The study has provided comprehensive information available to date for PAHs in seawater, sediment and fishes from the west cost of India especially from the Quilon to Mangalore region.
Bindhu,Paul; George,M K(ICAR, CMFRI, November , 2000)
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Abstract:
The thesis contains the results of an investigation on the " Population Genetic Structure of the Penaeus indicus " from southeast and southwest coasts of India. The P.indicus, popularly known as the Indian white prawn, is distributed widely in the Indo-Pacific, starting from New South wales in Australia in the east to the east coast of Africa in the west. Its heavy demand in the export market, the species has been exploited intensively from all along its areas of distribution in Indian waters. The population genetic characteristics of the species were examined by three independent but complementary techniques, namely, morphometrics (truss network), biochemical genetics (isozyme electrophoresis ) and molecular genetics (RFLP and RAPD). The east and west coast populations of the species may be genetically different. Due to certain constraints, the results obtained from the studies of restriction fragment length 70 polymorphism (RFLP) were limited. The significant difference in the number of bands in the sample populations strongly suggests that these two populations have considerably different population genetic structures
Mohandas, N N; Dr. George, M K(Indian Council of Agricultural Research, Central Marine Fisheries Institute, January , 1997)
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Abstract:
The objective of present investigation was to study the population genetic structure of S. longiceps by applying three different basic population genetic techniques such as cytogenetics, non-enzymatic biochemicalgenetics (general protein) and morphomeristics/metrics.
Simi Joseph, P; Dr.Rosamma, Philip(Cochin University of Science & Technology, July , 2009)
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Abstract:
The main source of protein for human and animal consumption is from
the agricultural sector, where the production is vulnerable to diseases,
fluctuations in climatic conditions and deteriorating hydrological conditions due
to water pollution. Therefore Single Cell Protein (SCP) production has evolved
as an excellent alternative. Among all sources of microbial protein, yeast has
attained global acceptability and has been preferred for SCP production. The
screening and evaluation of nutritional and other culture variables of
microorganisms are very important in the development of a bioprocess for SCP
production. The application of statistical experimental design in bioprocess
development can result in improved product yields, reduced process variability,
closer confirmation of the output response to target requirements and reduced
development time and overall cost.The present work was undertaken to develop a bioprocess technology for
the mass production of a marine yeast, Candida sp.S27. Yeasts isolated from the
offshore waters of the South west coast of India and maintained in the
Microbiology Laboratory were subjected to various tests for the selection of a
potent strain for biomass production. The selected marine yeast was identified
based on ITS sequencing. Biochemical/nutritional characterization of Candida
sp.S27 was carried out. Using Response Surface Methodology (RSM) the
process parameters (pH, temperature and salinity) were optimized. For mass
production of yeast biomass, a chemically defined medium (Barnett and Ingram,
1955) and a crude medium (Molasses-Yeast extract) were optimized using
RSM. Scale up of biomass production was done in a Bench top Fermenter using
these two optimized media. Comparative efficacy of the defined and crude
media were estimated besides nutritional evaluation of the biomass developed
using these two optimized media.
Description:
Dept. of Marine Biology, Microbiology and
Biochemistry, Cochin University of Science and
Technology,