Sanjeev, S; Dr.Joseph, Stephen(Cochin University of Science and Technology, February 5, 1990)
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Abstract:
In India much work has been done on different aspects of quality of
processed fish and fishery products (Pillai et al., 1965; Iyer and Chaudhuri,
1966; Iyer et al., 1966; Sreenivasan and Joseph, 1966; Pillai and Rao, 1969;
Mathen et al., 1975; Valsan et al., 1985) and standards have been formulated
for almost all the fishery products. Quality standards for fresh fish cover
only a few fish species available in the markets. For the formulation and
recommendation of quality standards for fish and fishery products for domestic
trade detailed background informations are necessary. Khot et al., (1982),
Valsan et al. J (1985) and Iyer et al. (1986) have reported on the bacterial
flora of sea foods at retail level in Bombay. Cochin is a major fish landing
centre of the south west coast of India, and an average of 25,000. tonnes
of fish/shell fish are landed annually at this harbour which is about 10 percent
of the total catch of fish in Kerala (Lakshmanan -et -al., 1984). All the
varieties of marine, brackish water and fresh water fishes are available in
Cochln throughout the year for catering to Its cosmopolitan. population and
informations regarding their bacteriological quality are scanty. Hence the
present study was undertaken to investigate the bacteriological quality of fish
and fishery products available in the markets and cold storages situated in
and around Cochin meant for internal consumption.
Description:
Central Institute of Fisheries Technology,
Cochin University of
Science and Technology
Princy,K G; Dr.Rani,Joseph; Dr.Sudha Kartha,C(Cochin University of Science & Technology, June , 2002)
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Abstract:
The primary aim of this work has been to develop conductive silicone and
nitrile rubbers, which are extensively used for making conductive pads in telephone
sets, calculators and other applications. Another objective of the work has been to
synthesise and characterize novel conducting polymers based on glyoxal and
paraphenylenediamine- poly(p-phenylenediazomethine. Conducting polymer
matrices were developed from polymer blends such as poly(pphenylenediazomethine),
polyethylene, PVC and silica and their properties were
studied.
Description:
Department of Polymer Science and Rubber Technology,Cochin University of Science
and Technology
Asok Kumar,K; Dr.Shahul,Hameed M(Cochin University of Science & Technology, 1990)
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Abstract:
The present study of the parasitic copepods gives the taxonomic description of thirty one species of parasites collected from various elasmobranch fishes of Kerala coast. Copepods parasitic on fishes include three sub orders, viz. poecilostomatoida, cyclopoida and siphonostomatoida. Parasitic copepods of elasmobranch fishes for the present study were collected from different fish landing centres of Kerala and by undertaking regular fishing trips. The collected parasites are identified to the species level and described. It is found that out of thirty one species, fifteen are new to science. They belong to the genera viz. Nothobomolochus Vervoot, 1962, Caligus Muller, 1785, Alebion, Kroyer, 1863, Gloipotes Steenstrup and Lutken, 1861, Pandarus Leach,1819, Perissopus Steenstrup and Lutken, 1861, Echthrogaleus Steenstrup and Lutken, 1861 and Kroyeria van Beneden, 1853. Fifteen new host records were reported. Two genera viz. Echthrogaleus and Entepherus were reported for first time from Indian waters. A new genus called Penicillus was erected. The general observations made during this study revealed certain interesting aspects of host-parasite relationship, host specificity, site specificity, adaptive modifications and geographical distribution.
Description:
Department of Industrial Fisheries, Cochin University of Science and Technology
Rashiba, A P; Dr.Saramma, Panampunnayil U(Cochin University of Science And Technology, April 9, 2010)
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Abstract:
The main objectives of the study are: To study the seasonal distribution of copepods with special reference to their qualitative and quantitative distribution, with notes on biodiversity in the Andaman Sea and the Bay of Bengal.
To study the spatial and temporal distribution of copepods in the Andaman Sea
and the Bay of Bengal.To understand the hydrography and the environmental characteristics of the Andaman Sea and the Bay of Bengal and their role in the distribution and biomass of copepods.To study the vertical migration/diurnal migration of the copepods.
To study the difference between the coastal and oceanic composition of copepods
in the study area and the factors responsible for it.
Description:
National Institute of Oceanography, Regional Centre, Kochi
Praseetha, P; Dr. Titus K Mathew(Cochin University of Science and Technology, September 13, 2015)
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Abstract:
Cosmology deals with the studies on the structure and evolution
of the universe. The model of the universe formulated by Friedmann,
Lemaitre, Robertson andWalker known as the standard model
(FLRW model) of the universe, which is based on the Einstein's theory
of gravity, turned out to be the accepted model because of the
various observational supports. The major observational supports
to this model are the explanation for the Hubble's law, primordial
nucleosynthesis, microwave back ground radiation etc.
Recent observations on Type Ia supernovae by teams led by S
Perlmutter, Brian P Schmidt and Adam G Riess led to the discovery
that the present universe is expanding in an accelerated manner. The
exotic form of matter which causes the acceleration is termed as dark
energy which produce negative pressure. Understanding the nature
and evolution of dark energy is a challenge for the cosmologists. In
addition to the evidences from supernovae, the anisotropy in CMBR
spectra, large scale structures and Baryon acoustic oscillations are
also supporting the discovery.
To explain dark energy, various theoretical models have been proposed.
One such model is the CDM model, in which the universe
is assumed to be composed of dark energy and dark matter. In this
model, Einstein's cosmological constant is considered as dark energy.
It has a constant equation of state; ! = p
= 1: The model predicts
the values of cosmological parameters such as the Hubble parameter,
transition redshift and present deceleration parameter, having a very
good agreement with the observational constraints. But this model
has two major
aws, which are:
1. Cosmological constant problem:- Theoretically predicted value
of dark energy density as the vacuum constant is,
1074GeV 4; while the observed value is 1047GeV 4: The
predicted value is greater than the observed value by 120 orders
of magnitude. This discrepancy between the theoretical
and observational values is known as the cosmological constant
problem.
2. Cosmological coincidence problem:- Energy densities of dark energy
and dark matter are found to be of the same order even
though their evolutionary nature are di erent. This is known as
the coincidence problem which is not explained by the CDM
model.
These led to the proposals of dynamical dark energy models by considering
that the equation of state parameter is evolving with the expanding
universe. Scalar models of dark energy such as Quintessence,
K-essence, Phantom model, Chaplygin gas model and holographicdark energy model are examples of dynamic dark energy models.
Holographic dark energy model is based on the holographic principle
developed by Susskind and 't Hooft. The principle says that
the degrees of freedom of a system resides on its surface rather than
in its volume. The total energy inside a region of size L must not
exceed the mass of a black hole of the same size. The holographic
dark energy density can then be formulated as, = 3c2M2
plL2 (1)
where 3c2 is a numerical constant, M2
pl = 8 G is the reduced Planck
mass. Possible choices for L; the IR cut-o , are Hubble horizon, particle
horizon and event horizon. The choices for the IR cut-o whether
it be Hubble horizon or particle horizon will not support an accelerating
universe, while the third choice, the event horizon, violates
causality. Another alternative for the IR cut-o is the Ricci scalar,
which was rst introduced by Gao et al. Later modi ed holographic
Ricci dark energy was proposed by Granda and Oliveros.
In the present thesis, the modi ed Ricci dark energy is studied
by considering its interaction with the dark matter present in the
universe. Owing to the lack of knowledge about the microscopic origin
of such an interaction, phenomenological interaction forms of nongravitational
nature is assumed.
Radha Devi, A; Dr.Kurian, C V(Cochin University Of Science And Technology, August , 1983)
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Abstract:
Cumacea plays an important role in the marine environment as food for man and comercially important species of fishes . Hence it is desirable to have a better knowledge of the taxonomy, ecology, biology and distribution of the various species of Cumacea. The present work is directed towards the study of the above aspects
Description:
School Of Marine Sciences,Cochin University Of Science And Technology
Pradeep Chandran, C; V P N Nampoori; Radhakrishnan, P(Cochin University of Science and Technology, January 10, 2016)
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Abstract:
We live in an Information age, which is marked by the onset of digital
revolution during or after the latter half of the 20th century. In this era, we saw
sweeping changes in digital computing and communication technology. We largely
depend on electronics and photonics for hardware requirements to aid this
technology. With the assistance of modern technology, electronic devices have
become an indispensable tool in our everyday life.
Inorganic semiconductor materials like silicon and gallium arsenide have been
exploited for the on-growing demands of digital revolution. Fifty years of continuous
research and technological advancements have pushed these materials to their
theoretical efficiency limit. On the other hand, the rapid advancement in technology
has created a huge electronic waste which pose a threat to the environment. The
scarcity of inorganic materials such as gallium and indium is an alarming factor and it
is estimated that these will run out completely in the next 20 years. The availability of
new suitable materials is crucial for the development of semiconductor technology.
With much promise of delivering low-cost and energy efficient materials, organic
semiconductors such as conjugated polymers and small molecules have opened up
new avenues for research. Despite the intense effort by scientists and researchers, the
performance and stability of organic devices have taken a back seat. Therefore an
immediate large-scale replacement of inorganic components by organic counterparts
are not foreseen in the near future. Although research is underway to improve the
performance of organic materials, it is important to constantly search for new
materials.Nature is a big treasure-trove of successfully conducted experiments by
natural selection. Inspired by its apparent simplicity and actual complexity,
researchers look out for natural materials or synthetic materials mimicked from
natural models, systems or elements. Bio-inspired photonics use natural design as
their inspiration to solve human problems and channel these solutions in new
directions. It is promising that natural and nature-inspired materials can achieve the
ambitious goal of ‘green’ technology for sustainable future.
Sandhya, R; Dr.Prathapan, S(Cochin University Of Science And Technology, November 11, 2013)
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Abstract:
the thesis entitled “STUDIES
ON DEVELOPING A FACILE ROUTE FOR THE SYNTHESIS OF
HIGHLY SUBSTITUTED QUINOLINE AND INDOLE
DERIVATIVES” portrays our attempt to revisit the mechanism of 1,3-
dipolar additions with a view to establishing whether it follows a
concerted pathway or a stepwise reaction sequence through the formation
of a zwitterionic intermediate, which will definitely contribute to the better use of this technique. Furthermore, we propose to develop novel
routes for the synthesis of quinoline and indole derivatives with predefined
substitution pattern.
The thesis is devided into four chapters
Description:
Department of Applied Chemistry, Cochin
University of Science and Technology
Sarun, P M; Dr.Syamaprasad,U(National lnstitute for Interdisciplinary Science and Technology, June , 2010)
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Abstract:
The objective of the present work is to study the effect of rare-earth (RE)
doping on the superconducting properties of (Bi,Pb)-2212 system and to develop
novel superconductors in the system with improved properties, especially,
the self- and in-field critical current densities so as to use them for practical
applications. This dissertation describes a range of findings in Bi-based
superconductor using the cationic substitution of rare earth (RE) elements.
Most of the experiments reported here take advantage of the difference in the
valency and ionic radii of dopant and doping site.
The main objective of the study was primarily to determine the effect of hydrographical parameters especially nutrients which were supplied externally to the seawater while culturing the diatom Chaetoceros calcitrans, under laboratory conditions, and to determine its optimum concentration for ideal growth of the culture, in such a condition of increased rate of pollution due to the industrialization and effluents. Also an attempt was made to study the possible correlation of diatom abundance in the South west Coast of India with the landings of the pelagic fishery resources, especially sardine, mackerel and anchovy, since these fishes are largely diatom feeders. Positive correlation was found between the diatoms and pelagic fish landings of Thalassery and Vizhinjam area while at Cochin there was less significant correlation between the two variables