Sreenath, P G; Dr.Ravishankar, C N(Cochin University of Science & Technology, January , 2007)
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Abstract:
In the present work, Indigenous polymer coated Tin Free Steel cans were analyzed fortheir suitability for thermal processing and storage of fish and fish products following standard methods. The raw materials used for the development of ready to eat thermally processed fish products were found to be of fresh condition. The values for various biochemical and microbiological parameters of the raw materials were well within the limits. Based on the analysis of commercial sterility, instrumental colour, texture, WB-shear force and sensory parameters, squid masala processed to F0 value of 8 min with a total process time of 38.5 min and cook value of 92 min was chosen as the optimum for squid masala in tin free steel cans while shrimp curry processed to F0 7 min with total process time of 44.0 min and cook value of 91.1 min was found to be ideal and was selected for storage study. Squid masala and shrimp curry thermally processed in indigenous polymer coated TFS cans were found to be acceptable even after one year of storage at room temperaturebased on the analysis of various sensory and biochemical parameters. Analysis of the Commission Internationale d’ Eclirage L*, a* and b* color values showed that the duration of exposure to heat treatment influenced the color parameters: the lightness (L*) and yellowness (b*)decreased, and the redness (a*) significantly increased with the increase in processing time or reduction in processing temperature.Instrumental analysis of texture showed that hardness-1 & 2 decreased with reduction in retort temperature while cohesiveness value did not show any appreciable change with decrease in temperature of processing. Other texture profile parameters like gumminess, springiness and chewiness decreased significantly with increase of processing time. W-B shear force values of mackerel meat processed at 130 °C were significantly higher than those processed at 121.1 and 115 °C. HTST processing of mackerel in brine helped in reducing the process time and improving the quality.The study also indicated that indigenous polymer coated TFS cans with easy openends can be a viable alternative to the conventional tin and aluminium cans. The industry can utilize these cans for processing ready to eat fish and shell fish products for both domestic and export markets. This will help in reviving the canning industry in India.
Description:
Faculty of Marine Sciences, Cochin University of Science and Technology
Kesavan Nair, A K; Dr.Alagaraja, K(Cochin University Of Science And Technology, June 24, 1988)
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Abstract:
The preceding discussion and review of literature show
that studies on gear selectivity have received great
attention, while gear efficiency studies do not seem to have
received equal consideration. In temperate waters, fishing
industry is well organised and relatively large and well
equipped vessels and gear are used for commercial fishing
and the number of species are less; whereas in tropics
particularly in India, small scale fishery dominates the
scene and the fishery is multispecies operated upon by
nmltigear. Therefore many of the problems faced in India
may not exist in developed countries. Perhaps this would
be the reason for the paucity of literature on the problems
in estimation of relative efficiency. Much work has been
carried out in estimating relative efficiency (Pycha, 1962;
Pope, 1963; Gulland, 1967; Dickson, 1971 and Collins, 1979).
The main subject of interest in the present thesis is an
investigation into the problems in the comparison of fishing
gears. especially in using classical test procedures with
special reference to the prevailing fishing practices (that
is. with reference to the catch data generated by the
existing system). This has been taken up with a view to
standardizing an approach for comparing the efficiency of
fishing gear. Besides this, the implications of the terms
‘gear efficiency‘ and ‘gear selectivity‘ have been examined
and based on the commonly used selectivity model (Holt,
1963), estimation of the ratio of fishing power of two gear
has been considered. An attempt to determine the size of
fish for which a gear is most efficient.has also been made.
The work has been presented in eight chapters
Description:
Central Institute Of Fisheries Technology,Cochin University Of Science And Technology
Narayanan, T; Dr.Chandramohanakumar, N(Cochin University of Science And Technology, June , 2006)
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Abstract:
The thesis entitled “Sterols in Mangrove Sediments of the Cochin
Estuary” is an attempt to characterize the sterol content of the mangrove
sediments, their dietary status with respect to the natural flora and fauna
present, their transfonnations in the sediment and assess contributions, if any to
the nursery character of the mangrove eco system. Samplings were done from
two sites at Mangalavanam and Vypin. Mangalavanam is a patchy mangrove
area in the heart of the city of Cochin and serves as a small bird sanctuary. This
is an almost closed system with a single narrow canal linking to the estuary.
Vypin, the largest single stretch of mangroves in Kerala, is regularly inundated
by a semi diurnal rhythm of Cochin bar mouth. Perhaps, this is the only site in
Kerala where one can see mangroves right along the accreting seacoast.
However a lot of developmental pressure is threatening the very existence of
these mangroves. Post monsoon sediment samples from these areas were used
for the present study, as it is the period of maximum faunal growth and activity
Description:
School of marine sciences, Cochin University of Science And Technology
Ajith,Joseph K; Dr. Balchand, A N(Cochin University of Science and Technology, December , 1996)
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Abstract:
The dynamics and associated stability analysis of tidal inlets situated on the southwest coast of India, namely Andhakaranazhi (90 45 J OO JJN and 760 17 J 29 JJ E) and the other at
Cochin harbour inlet (90 58 1 04 J1N and 760 14 1 50 1J E) have beenconducted. A detailed study on the inlet regime of Cochin barmouth (permanent in nature) was attempted so as to elucidate information on: (a) channel characteristics (b) tidal hydraulics and (c) stability of the inlet. In this
connection, a naturally occurring seasonal sandbar formation at Andhakaranazhi, near Sherthallay, about 20 km south of Cochin inlet, was also chosen as a site ofstudy brought out conclusively the dynamical study. The aspects of ( 1) tidal influx/out flux (2) channel morphology (3) sedimentation regime and (4) stability and factors related
to stability of these locations. The above aspects are supported by suitable mathematical formulations to describe the associated coastal processes, wherever applicable
Description:
School of marine science, Department of Physical Oceanography, Cochin University of
Science and Technology
Anupama Nair, P R; Dr.Mohammed Salih,K Y; Dr.Sujatha, C H(Cochin University Of Science And Technology, May , 2008)
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Abstract:
Poisoning by pesticides from agricultural fields is a serious water
pollution problem and its environmental long-term effect may result in the
incidence of poisoning of fish and other aquatic life forms (jyothi and
Narayan, 1999). Fishes like Heteropneustesfbssilis and C/arius batrac/nus are
especially prone to serious pesticide pollution as their habitat is mostly the
agriculture area. Though only few studies are conducted in this area, it can
be assessed from the local information that, population of such fish is on
the verge of vulnerability due to extensive use of pesticides. The knowledge
of sublethal effects of xenobiotic compounds on hematological parameters,
enzyme activities and metabolite concentrations is very important to
delineate the fish health status and provide a future understanding of
ecological impacts. These pesticides act by causing inhibition of
cholinesterase enzymes (ChE) by formation of enzyme inhibitor complex
(O'Brien, 1976) and damaging the nervous system. These effects may result
in metabolic disorders. Associated to cholinesterase activities, a study of
other enzymes such as phosphatases and aminotransferases close to
intermediary metabolite determination provides a wider view of
metabolism. Interest in toxicological aspects has grown in recent years and
research is now increasingly focused on mechanistic aspects of oxidative damage and cellular responses in biological system. The term ‘biomarker’ is
generally used in a broad sense to include almost any measurement
reflecting an interaction between a biological system and a potential hazard,
which may be chemical, physical or biological (WHO, 1993). As biomarker
stands for immediate responses, they are used as early warning signals of
biological effects caused by environmental pollutants.
The present work attempts to assess the toxicity of organophosphorus
insecticide monocrotophos on the experimental organism selected for this
study namely stinging catfish (Heteropneustesfossi/is) (Bloch), and to probe
into the stress responses of the organism
Description:
Department of Marine Biology, Microbiology and
Biochemistry, Cochin University of Science and Technology
Abdul,Rashid K K; Dr.Krishnan Nambisan, P N; Dr.Jacob, Chacko(Cochin University of Science and Technology, November , 1986)
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Abstract:
This thesis deals with the studies on the synthesis and characterisation of the complexes of embelin with manganese (II), cobalt(II), nickel (II), copper (II), zinc (II), cadmium (II), chromium (III), iron (III) lanthanum(III), praseodymium (III) neodymium (III) Samarium (III), gadolinium (III) dysprosium (III), yttrium (III) thorium (IV) and uranium (VI). Elemental analysis as well as spectral, thermal and magnetic data were used to ascertain the composition of the complexes and to establish the structures of the metal complexes. Wherever possible, the electronic spectra and magnetic data were used to predict the stereochemistry of the complexes.The thesis is divided into four chapters.
Description:
Division of Chemical
Oceanography, School of Marine Science, Cochin University of Science and Technology
Gopakumar, G; Dr.Kuttyamma, V J(Cochin University of Science and Technology, June 6, 1991)
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Abstract:
The work presented in this thesis is centered mainly around delineating the toxic effect of hydrogen sulphide on penaeid prawns and understand its influence on the ecology of estuary. The present investigation also involved characterization of the effects of hydrogen sulphide on the growth and behavioural responses of Penaeus indicus. The test animals employed during the present study namely indicus and Metapenaeus dobsoni are both ecologically and economically relevant. The thesis embodying the details of the investigation has been organized into three chapters comprising Acute toxicity, influence of hydrogen sulphide on the ecology of estuary and effect of hydrogen sulphide on growth and substratum selectivity of penaeid prawn. Each chapter has been partioned into various sections as Introduction, Material and Methods, Results and Discussion for a lucid presentation of the subject matter.
Description:
Division of Marine Biology
Microbiology and Biochemistry, School of Marine Science,
Cochin University of Science
and Technology
Santhosh,S; Mathew,P T(Cochin University of Science and Technology, October , 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
Babu,C A; Dr.Viswanadham,D V; Dr.Ram Mohan,H S(Cochin University of Science and Technology, January , 1989)
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Abstract:
The main aim of the study is to give a clear picture of various meteorological factors affecting the dispersal of pollutants. One such important developing metropolis, namely Madras, is chosen for the present study. The study throws light into the occurrence of inversions, isothermals and lapse conditions and the vertical and horizontal extent of mixing of pollutants. The thesis also aims to study the wind climatology and atmospheric stability .The study gives a insight to the spatial distribution of sulphudioxide concentration using the Gaussian plume model, which accounts for various industrial sources. The researcher suggests optimum locations for industries and various steps to reduce air pollution.
Description:
School of Marine Sciences, Cochin University of
Science and Technology
Saramma, A V; Dr. Babu, Philip(Cochin University of Science and Technology, December , 1992)
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Abstract:
This thesis Entitled Studies on amylolytic bacteria in cochin backwaters.This thesis presents a detailed account of the disribution of amylolytic bacteria in water. sediment. fishes ( Etroplus suratensis and Liza parsia) • prawns ( Penaeus indicus and Metapenaeus dobsoni) and clams ( Sunetta scripta and Meretrix casta) from Cochin backwaters. genera-wise distribution of amylolytic bacteria, ability of selected strains to grow and produce amylase at various physico-chemical conditions. Regulation of amylase synthesis anrt characters of amylases producer by these halophilic bacteria.Amylolytic bacteria are distributed widely in water. sediment. fishes. prawns and clams of Cochin back waters. 53% of the total isolates tested were capable of producing amylase. Maximum number of arnylolytic bacteria were present in Metapenaeus dobsoni. In general, the gut region of aquatic animals harboured more amylolytic bacteria than the gill or surface. These bacteria may help in the digestion of starch present in their food.Presence of ions in the medium was found to be essential for growth and amylase production. It was found that this ionic requirement is not highly specific. Sorlium chloride could be replaced by potassium chloride. or magnesium chloride to some extent I without affecting growth and amylase production. The important function of these ions may be to maintain the osmotic balance between the cells and their environment.All the isolates showed the ability to grow and produce amylase using raw-starches from cassava. plantain and potato .This property suggests their role in the rdegradation of native starches in the environment
Description:
School of Marine Sciences, Cochin
University of Science and Technology
Kuruvila, Mathew; Dr.Kurian, C V(Cochin University of Science And Technology, April , 1978)
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Abstract:
The present study was undertaken with a view to understanding some aspects of the morphology, bionomics and physiology of the sea anemone A.nigrescens. This species was selected for the study since it is abundantly available along the coast throughout the year and can successfully reared in the laboratory without much effort. The present study deals with the following aspects of A.nigrescens. description of the species, habitat, food and feeding, digestion, studies on salinity tolerance, studies on oxygen consumption, studies on tolerance to desiccation, asexual reproduction and regeneration.
Description:
School of marine sciences, Cochin University of Science And Technology
Pradeep,R; Dr.Lakshmanaperumalsamy, P(Cochin University Of Science And Technology, July 28, 1986)
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Abstract:
Microbiological studies on the incidence, behaviour,
activity and ecological implications of marine micro~organisms,
particularly microbial pathogens in coastal waters and
estuaries exhibit the increasing concern and awareness
of environmental impacts on health and wealth. Marine
microbiologists have been active in investigating on the
distribution, kinds of organisms and their activity in the
environment. However, informations on the effect of environment
on the ecology or on the distribution (spatial/temporal) of
microbial comunity and competition among groups inhabiting
the ecosystem are sparE§L Estuarine environment are complex
with respect to diversity of habitats, variation in physicochemical
parameters and contamination by terrestrial bacterial
species.
Being the organisms of‘public health significance,
ecological studies on total coliforms, faecal coliforms,
faecal streptococci, §. ggli and X. parahaemolyticus have great
relevance as studies of these types would provide a wealth
of information to environmentalists and to fishery industry.
In order to evalé%e the status, role and significance of
potentially hazardous bacterial species in natural environment
it is necessary to monitor the ecology of such organisms
systematically in relation to physico-chemical parameters
Description:
Division Of Marine Biology. Microbiology And Biochemistry
School Of Marine Sciences
Cochin University Of Science And Technology