Mohammed Salih, K Y; Dr.Kurian, C V(Cochin University Of Science And Technology, April 18, 1977)
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Abstract:
It is the object of the present study to contribute so much information as possible on the biology and economy of M.casta on the south west coast of India. It includes investigations on the growth of the species in three dimensions.
Description:
Department Of Marine Sciences,Cochin University Of Science And Technology
Kuttyamma,V J; Dr.Kurian, C V(Cochin University of Science and Technology, 1978)
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Abstract:
Very little is known about the tolerance of the pensoid prawns in Indian waters under varying environment conditions ,except for a note on the salinityon
The growth of the juvenile papacus indicus by sreekumaran nair and krishnankutty there seems to be no work on this aspect besides the oxygen consumption of metsponecus dobsoni which is a major constituent of prawn fishery in this region has not been studied so far.T he present work comprises studies on the occurrence and abudance of penacid prawnsin two major estuaries in Kerala the kayamkulam lake and cochin backwaters the salinity and tempeture tolerance the effect of salinity on the growth of three comercially important prawns of kerala namely pensecus indicus, ,metaponaeus dobsoni, M monoceros and the respiratory metabolism of M. dobsoni.
Description:
School of Marine Science, Cochin University of Science and Technology
Susanna, George; Dr.Arumughan, C(Cochin University of Science and Technology, December , 1993)
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Abstract:
During the last couple of decades, the oil palm has emerged as the second largest source of edible oil in the world. Recently oil palm has been introduced commercially in India to augment edible oil supply in the country. Currently, about 10,000 hectares are under oil palm cultivation in India, and it is envisaged to cover about 6 lakh hectares in the coming years. Though oil palm is a major commercial oil crop, not much basic information on the lipids of the fruit (the source of palm oil) is available even where oil palm is cultivated in a very large scale. Being a new crop to India, it is of paramount importance to understand the basic chemistry/biochemistry of the lipids, which in turn, may find practical applications in the area of processing and product development. The present investigation entitled "Studies on the Composition and Structure of Palm Oil Glycerides" was designed with a view to elucidate the lipid composition and structure under conditions such as fruit development and processing.
Description:
Food Science and Biochemistry Division, Regional Research Laboratory
Sasidharan Pillai, N K; Dr.Shahul,Hameed M(Cochin University of Science and Technology, October 24, 1984)
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Abstract:
The present study of the parasitic copepods gives an account of the taxonomic description of seventy seven species of parasites collected from the food fishes
of the Kerala coast. Out of the seventy seven species described, fourteen are new to science, two new records for the Indian waters and ten new host records. The
males of Parapetalus longipinnatus Rangnekar and Lerna~thropus indicus Pillai were collected and described for the first time. The parasites described belong to the suborders Cyclopoida, Caligoida and Lernaeopodoida. The
available description of many species of this locality is reviewed and supplemented with the help of the present detailed study. The general observations made during this study reveale certain interesting aspects of the host parasite relationship, host specificity, adaptive modification and geographical distribution. A brief discussion
of these observations made is also presented.
Description:
Department of Industrial Fisheries, School of Marine Sciences
Cochin University of Science And Technology
Balasubramanian, C P; Dr.Suseelan, C(Central Marine Fisheries Research Institute, 1993)
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Abstract:
The present study deals with a general introduction which outlines the objective of the study providing an exhaustive review of works on crabs with particular reference to deep-sea forms. In the first section, Taxonomy and Geographical disribution of the crab are dealt with. The species is described in detail based on several male and female specimens obtained from the pelagic and bottom collections, and its identity in Indian waters is established. It is also distinguished from a closely allied species so far not reported from Indian waters. The second section comprises the biology of the species and it is dealt with under four subheading, namely Habit and Habitats, Reproduction, Food and feeding and Proximate composition. The different habitats occupied by juveniles, subadults and adults of the species have been described and discussed in the light of available information on differential distribution of other related species. The reproductive biology is described in various details touching on gross anatomy and histology of the reproductive systems, spermatogenesis, oogenesis, size at maturity, ovarian maturation process, fecundity, egg carriage and breeding. The food and feeding habits of the species have been studied with reference to the different life stages such as juveniles, subadults and adults during the different phases of life based on stomach content analysis. The percentage of meat recovery and protein, carbohydrate and lipid content of meat have been described in the section dealing with proximate composition. In section three the distribution and abundance of the crab for the entire Indian EEZ and some contiguous ares have been described and illustrated in detail separately for pelagic and benthic realms. The size frequency disrtibution, sex ratios, length weight relationship and relative abundance of breeding population in the experimental catches have been dealt with in detail and discussed.
Sobha, Cyrus; Dr.Jose, Babu T(Cochin University of Science & Technology, July , 2008)
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Abstract:
The present study aimed at critically looking at the current practice of the
installation of compacted clay liner using bentonite enhanced sand (BES).
The application of bentonite is currently the most accepted practice for
lining purposes. The ideal bentonite sand combination, which satisfies the liner
requirements is 20% bentonite and 80% sand, was selected as one of the liner
materials for the investigation of development of desiccation cracks. Locally
available sundried marine clay and its combination with bentonite were also
included in the study. The desiccation tests on liner materials were conducted for
wet/dry cycles to simulate the seasonal variations. Digital image processing
techniques were used to measure the crack intensity factor (CIF), a
useful and effective parameter for quantification of desiccation cracking.
The repeatability of the tests could be well established, as the variation in CIF values
of identical samples had a very narrow range of 0 to 2%. The studies on the
development of desiccation cracks showed that the CIF of bentonite enhanced
sand mixture (BES) was 18.09%, 39.75% and 21.22% for the
first, second and third cycles respectively, while it was only 9.83%, 7.52% and
4.58% respectively for sun dried marine clay (SMC). Thus the locally available,
alternate liner material suggested, viz SMC, is far superior to BES, when
subjected to alternate wet/dry cycles. Further, the improvement of these liner materials when amended with randomly distributed fibre reinforcements was also investigated. Three types of
fibres ,namely nylon fibre, polypropylene monofilament and polypropylene fibre
mesh were used for the study of fibre amended BES and SMC.The influence of
these amendments on the properties of the above liner materials is also studied.
The results showed that there is definite improvement in the properties of the liner
materials when it is reinforced with discrete random fibres. The study also proved
that the desiccation cracks could be controlled with the help of fibre
reinforcement.
Description:
School of Engineering, Cochin University of Science and Technology
Palanisamy, K; Dr.Parameswaran Pillai, P(Cochin University of Science And Technology, May , 1989)
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Abstract:
Culturing of fish in captivity demands a detailed knowledge on well balanced
diet and adequate feeding. Formulation and production of nutritionally
balanced diets for fish require research, quality control and biological
evaluation. It is often assuemed that what is ingested is also digested, but
this is not always be the case. Digestion depends upon both the physical state
of the food and the kind and quantity of enzymes in the digestive tract.
The ability of fish to digest a particular component of diet can be
ascertained by investigating the complement of digestive enzymes present along
the digestive tract. Investigations on the basic digestive physiology will not
only enhance our present knowledge on nutrition and feed development, but will
also contribute in understanding the digestive functions of lower vertebrates.
It is against this background that the present topic of investigation "Studies
on the digestive enzymes of the cultivable grey mullet Liza parsia Hamilton Buchanan, l822" has been selected. The thesis is arranged and presented in eight chapters.
Hemambika, M; Dr. Paul, Raj R(Cochin University Of Science And Technology, June , 1989)
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Abstract:
The efficiency of a diet not only depends on its nutrient composition and
nutrient balance but also on the effective utilization by the animal. In the
utilization of dietary nutrients, the digestive enzymes play the crucial role of
catalysing the hydrolytic reactions, splitting the macromolecules into simple
absorbable molecules. The activity of these biocatalysts is regulated by
alterations in pH, temperature, substrate type and concentrations, and also by
the presence of activators and inhibitors. Thus any shift from the optimum
conditions necessary for these enzymes may affect their activity, thereby
correspondingly modify the digestibility of the nutrients supplied to the
animals. Thus, investigations on the important digestive enzymes and their
preferential conditions of activity are essential, so that the results obtained
could be used in rationally adjusting the quality and quantity of feed supplied
to the different stages of prawns In India, directed research on nutritional physiology and biochemical approaches to digestion in commercially important prawns is taken up_ only recently, and the field is still in an infant stage. In view of its emerging importance it is identified as an area of priority and the present investigation has been carried out on the Indian white prawn Penaeus indicus
Description:
Centre Of Advanced Studies In Mariculture,Cochin University Of Science And Technology
George,K C; Dr.Kurian, C V(Cochin University of Science and Technology, October , 1979)
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Abstract:
The broad objective of the present study is to present a synoptic picture of the distribution and abundance of fish eggs and the lmportant groups of fish larvae obtained off the SW coast of India. so as to delineate the spawning areas and seasones of the fish population. with special reference to the scombroid fishes. An attempt was also made to correlate the occurrence of certain categories of larvae and hydrographical factors like
temperature and salinity. The present effort was a pioneering one in Indian waters. in as much as it involved systematic and seasonally repetitive collection of ichthyoplankton from a large
stretch of our seas and mapping of their distribution and abudance.
Description:
School of Marine Science, Cochin University of Science and Technology
Asokan, K; Dr.Ramamohan, T R(Regional Research Laboratory(CSIR), September , 2003)
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Abstract:
We present a novel approach to computing the orientation moments and rheological
properties of a dilute suspension of spheroids in a simple shear flow at arbitrary Peclct
number based on a generalised Langevin equation method. This method differs from
the diffusion equation method which is commonly used to model similar systems in that
the actual equations of motion for the orientations of the individual particles are used
in the computations, instead of a solution of the diffusion equation of the system. It
also differs from the method of 'Brownian dynamics simulations' in that the equations
used for the simulations are deterministic differential equations even in the presence of
noise, and not stochastic differential equations as in Brownian dynamics simulations.
One advantage of the present approach over the Fokker-Planck equation formalism is
that it employs a common strategy that can be applied across a wide range of shear and
diffusion parameters. Also, since deterministic differential equations are easier to simulate
than stochastic differential equations, the Langevin equation method presented in
this work is more efficient and less computationally intensive than Brownian dynamics
simulations.We derive the Langevin equations governing the orientations of the particles in the
suspension and evolve a procedure for obtaining the equation of motion for any orientation
moment. A computational technique is described for simulating the orientation
moments dynamically from a set of time-averaged Langevin equations, which can be
used to obtain the moments when the governing equations are harder to solve analytically.
The results obtained using this method are in good agreement with those available
in the literature.The above computational method is also used to investigate the effect of rotational
Brownian motion on the rheology of the suspension under the action of an external force field. The force field is assumed to be either constant or periodic. In the case of con-
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stant external fields earlier results in the literature are reproduced, while for the case of
periodic forcing certain parametric regimes corresponding to weak Brownian diffusion
are identified where the rheological parameters evolve chaotically and settle onto a low
dimensional attractor. The response of the system to variations in the magnitude and
orientation of the force field and strength of diffusion is also analyzed through numerical
experiments. It is also demonstrated that the aperiodic behaviour exhibited by the
system could not have been picked up by the diffusion equation approach as presently
used in the literature.The main contributions of this work include the preparation of the basic framework
for applying the Langevin method to standard flow problems, quantification of rotary
Brownian effects by using the new method, the paired-moment scheme for computing
the moments and its use in solving an otherwise intractable problem especially in the
limit of small Brownian motion where the problem becomes singular, and a demonstration
of how systems governed by a Fokker-Planck equation can be explored for possible
chaotic behaviour.
Balchand, A N; Dr.Kurup, P G; Dr.Krishnan Nambisan, P N(Cochin University Of Science And Technology, November , 1983)
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Abstract:
The present study aims at the investigation of the
1ysico—chemical features of a tropical tidal river viz.
we Muvattupuzha river. This river is expected to receive
Jderate to heavy pollution loads in years to come, from
we lone industrial unit, already set up on its bank.
ilike other rivers, the geographical disposition of this
Lver attains unique importance as regards its dynamics for
3) availability of natural runoff water from catchment
:eas, which becomes very heavy during the monsoon season
3) regular steady availability of tail race water from a
/dro—electric power station throughout the yearThe study also aims at arriving at the balancing
forces of inherent self~purification of the river verses
pollution loads from the factory effluents. The investigation
period falls ahead of actual pollution occurrence
and so the ambient conditions for a period of nearly
one-and-a—half years were investigated, the analyses of which
providflz to formulate the inter-relations of parameters
varying with seasons. Tracer experiments were carried out
which revealed the dispersion and dilution characteristics
of the river in the vicinity of effluent outfall. The
studv covers the trial—cum-capacity production periods
of the factory during which effluents of various strength
and quantity were discharged into the river; a few computed
values arQ’cjmpgrQdl ... with the observed values. The
base data along with the profiles of Oxygen sag equation have
been utilized fb develop a mathematical model of the
river with regard to its water quality
Description:
Department Of Marine Sciences,Cochin University Of Science And Technology