Cheriyan, P V; Dr.Kurian, C V(Cochin University of Science and Technology, 1971)
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Abstract:
Sphaeroma terebrans Bate, one of the most destructive wood-boring isopod crustacean occurring in the Cochin harbour region was taken up for investigations on its habitat, breeding, attack on timber, salinity tolerance and respiration. The respiration of the animal under different stresses was noted using an instrument fabricated in the laboratory. Of the various hydrographic conditions of the Cochin harbour region studied, salinity is found to be the most fluctuating factor and the variations are largely influenced by the seasonal rain fall from one side and the tidal currents on the other.In spite of the great fluctuations in salinity, Sphaeroma terebrans occurs throughout the year in the Cochin harbour region, though their number varies in different months. Exposure tests show that Sphaeroma terebrans can remain for about 20 to 24 hours outside water in a damp atmosphere.
Description:
Department of marine biology and oceanography,Cochin University of Science and Technology
Mohan Rajan, K V; Dr.Shahul,Hameed M(Cochin University Of Science And Technology, April , 1991)
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Abstract:
A study on the different aspects of spiny lobster fishery of south
west coast of India with respect to the factors relevant to production, including
conservation and management measures for putting this fishery on sound
basis needs no emphasis. There are some aspects of this fishery which have
not been sufficiently inquired into and some others which have been touched
upon intermittantly and in a languid way. The attempt here is to throw
light on these aspects from a production point of view. Emphasis is on
harvest technology and the conservation and management measures and it
is proposed to make a critical review of such measures in vogue in other
lobster fishing countries and discuss about suitable methods for this fishery
Description:
Department of Industrial Fisheries, Cochin University of
Science and Technology
Shobha,Prataprao Shere; Dr.Ramachandran Nair,P V(Cochin University of Science and Technology, March , 1985)
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Abstract:
Studies on sporulation of four commercially important red
(sea-weeds) algae ^(agarophytes) namely Gelidiella acerosa, Gracilaria
corticata, G edulis and Hypnea musciformis growing in the
vicinity of’ Mandapam coast were carried out from October 1981
to September 1983. During the two years of study; fruiting
behavior in the natural population of these species was also
investigated. Laboratory experiments were carried out with
the four algae sea weeds to collect information on seasonal aspects of spore production and diurnal variation of spore shedding. Detailed studies were made under laboratory conditions to know the effects of some selected environmental factors such as desiccation, salinity, temperature, light intensity and photoperiod on spore output in Gelidiella acerosa, Gracilaria edulis and kypnea musciformis hydrological data were also collected from the inter-tial region around mandapam area. The result obtained on all the above aspects are presented in this thesis
Satyanarayana Murty, A; Dr.Sharma,G S(Cochin University of Science and Technology, March , 1984)
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Abstract:
It became so usual for the east coast of India to face at least IO to 15 cyclones every year, out of which 3 to 4 may reach the deep depression stage. As a result the east coast of India experiences frequent heavy damages of varying intensities due to storm surges and it is also not unusual to experience a calamitous deluge once in a decade or so. Loss of life and damages can be minimized only if the magnitude of the surge could be predicted at least a day in advance. Therefore, an attempt to study the storm surges generated by the cyclones that strike the
east coast of India and. suggest a method of predicting them through nomogram is made
Description:
School of Marine Science,Cochin University of Science and Technology
Suja, N R; Mohammed Yusuff, K K(Department of Applied Chemistry, 2002)
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Abstract:
The thesis deals with the synthesis, characterization and catalytic activity studies of supported cobalt(ii), nickel(II) and copper(II) complexes of O-phenylenediamine and Schiff bases derived from 3-hydroxyquinoxaline -2-carboxaldehyde. Zeolite encapsulation and polymer anchoring was employed for supporting the complexes. The characterization techniques proved that the encapsulation as well as polymer supporting has been successfully achieved. The catalytic activity studies revealed that the activities of the simple complexes are improved upon encapsulation. Various characterization techniques are used such as, chemical analysis, EPR, magnetic measurements, FTIR studies, thermal analysis, electronic spectra, XRD, SEM, surface area, and GC.The present study indicated that the that the mechanism of oxidation of catechol and DTBC by hydrogen peroxide is not altered by the change in the coordination sphere around the metal ion due to encapsulation. This fact suggests outer sphere mechanism for the reactions. The catalytic activity by zeolite encapsulated complex was found to be slower than that by the neat complex. The slowing down of the reaction in the zeolite case is probably due to the constraint imposed by the zeolite framework. The rate of DTBC ( 3,5-di-tert-butylchatechol)oxidation was found to be greater than the rate of catechol oxidation. This is obviously due to the presence of electron donating tertiary butyl groups.
Kochurani, George; Dr.Sugunan, S; Dr.Mohanan, P V(Cochin University of Science and Technology, December , 2006)
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Abstract:
The prime intension of the present work was a synthetic investigation of the
preparation, surface properties and catalytic activity of some transition metal
substituted copper chromite catalysts. Homogeneous co-precipitation method is
employed for the preparation of catalysts. Since the knowledge about the structure and
composition of the surface is critical in explaining the reactivity and selectivity of a
solid catalyst. a systematic investigation of the physico-chemical properties of the
prepared systems was carried out. The catalytic activity of these systems has also been
measured in several oxidation reactions of industrial as well as environmental
relevance. The thesis is dedicated to several aspects of chromite spinels giving
emphasis to its preparation, characterization and catalytic performance towards
oxidation reactions.
Description:
Department of Applied Chemistry,
Cochin University of Science and Technology
Biju, A; Dr.Saramma, Panampunnayil U(National Institute of Oceanography, July , 2008)
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Abstract:
Members of the order Mysidacea are important component in marine
and estuarine plankton inhabiting all regions of the oceans. There are many
brackish water species and few species occur in fresh water, some have
become adapted to the specialized environments of caves and wells. They are
omnivores, responsible for remineralisation of a substantial portion of the
detritus in the water column. They form an important link in the food chain
(between microbial producers and secondary consumers) and therefore play a
major role in the cycling of energy within the aquatic ecosystem. In tropical
and subtropical waters, swarms of mysids are exploited commercially and
marketed as preserved cooked food. Mysids have been used in fish farming as
live feed resource. They are also excellent experimental organism, extremely
useful in the studies of potential impact of various pollutants in the aquatic
environment. Mysids are also used in wood pulp effluent plants.Considering the significant role of mysids in the productivity of tropical and coastal ecosystems,the present study has been undertaken to extend our knowledge on the systematics,
species composition, distribution,abundance and ecology of mysid fauna of the
Indian EEZ and adjoining areas. The present study therefore will undoubtedly fumish
valuable information on Mysidacea of the Indian waters.
Molly Varghese; Krishnan, L; Kuttyamma,V J(CMFRI, April , 2006)
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Abstract:
The studies were conducted in nine stations with varying ecological characteristics along Cochin backwaters and adjoining canals. Many workers opined that the distribution of rotifers is cosmopolitan. The significance of rotifers as first food for early larvae was indicated by Fujita. Aquaculture is a fast growing field in fisheries sector and it is gaining more importance as the fish landings and supply are getting irregular. A consistent supply of fish/shellfish can only be achieved through aquaculture. The success of any culture activity depends on the timely production of seeds of finfishes/shellfishes. The availability of wild seed is seasonal and erratic. So, a dependable source of seed of fishes and shellfishes is possible only through large scale production in hatchery. A successful seed production activity depends on the availability of a variety of suitable live feed organisms in sufficient quantities at the proper time for use in the larval stages. As the live feeds promote high growth rates, easy digestion, assimilation and the quality of not contaminating the culture water when compared to other artificial feeds, make the culture of live feed organisms the principal means of providing food for the larvae of finfishes and shellfishes. Rotifers are considered to be an excellent and indispensable food for larvae of many finfishes and crustaceans. It (1960) was the first to culture Brachionus plicatilis for feeding marine fish larvae, and now it is being extensively used as live feed in hatcheries all over the world. They are a group of microscopic organisms coming under the Phylum Rotifera which comprises of about 2000 species. Their slow swimming habits, ability to tolerate a wide range of salinities, parthenogenetic mode of reproduction and ability to get enriched easily, make rotifers an ideal live feed organism. The major factors such as temperature, salinity and food that influence the reproductive potential and thereby the population size of rotifer, Salinity is one of the most important aspect influencing the reproductive rate of rotifers. The feed type and feed concentration play a vital role in influencing the reproductive rate of rotifers. For culture of rotifers, the commonly used micro algae belong to Chlorella, Nannochloropsis, Isochrysis and Tetraselmis. While some studies have suggested that, algal diet has little effect on reproductive rates in 1979 while using the rotifer, Brachionus plicatilis as feed for the larvae of red sea bream, Pagrus major. It is generally accepted that rotifers play a pivotal role in the successful rearing of marine fish larvae.
saji, P.K; Prof. (Dr.) A. N. Balchand(Cochin University of Science and Technology, November 5, 2015)
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Abstract:
The recurrent warming of oceans is an important process in
maintaining the climate of earth. Ocean temperature is an important climatic
indicator among others such as atmospheric humidity, tropospheric
temperature, sea level, ocean heat content, temperature over land, sea ice
etc. The oceans absorb large amounts of heat and Carbon dioxide, thereby
reducing the impact of global warming. The important point here is the
carrying capacity of the oceans and its future behavioral patterns to the
present warming trend.Warm pools represent upper ocean temperatures and act as an index
for climate change. Its temporal and spatial variations can have crucial
impacts on climate change. This study focuses on the warming of the Indian
Ocean with an emphasis on the warm pool (IOWP) with the following
objectives:
1. A detailed study on the annual characteristics of IOWP
2. Understand ENSO-induced variability on IOWP
3. Deduce the long term trend SST and IOWP in response to global
warming and
4. Model SST using 1-Dimensional Mixed Layer Model.
Santhosh,S; Mathew,P T(Central Institute of Fisheries Technology, Faculty of Marine Sciences, 2006)
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Abstract:
The present study examined the antiulcer effect of glucosamine on mucosal antioxidant defense system in ibuprofen-induced peptic ulcer in male albino rats. The results of the present study indicate that the pre-oral administration of chitosan and glucosamine maintain near to the normal status the activities of the mucosal antioxidant enzymes and the level of GSH (Glutathione), which protect mucosa against oxidative damage by decreasing the lipid peroxidation and strengthening the mucosal barrier, and which are the first line of defense against exogenous ulcerogenic agents. In this study indicate that the oral pre-treatment of chitosan and glucosamine can prevent ibuprofen-induced peptic ulcer in rats.This study can be concluded that co-administration of chitsosan and glucosamine can effectively prevent the isonized and rifampicin induced hepatotoxicity in rats.Comparatively, chitosan was found to have better results than glucosamine in alleviating the hepatic disorders.