Euphrasia, C J; Dr.Madhusoodana,Kurup B(Cochin University Of Science And Technology, July 30, 2004)
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Abstract:
The previous faunistic studies were concentrated.on the taxonomical and zoogeo—
graphical aspects. These studies contributed to many new additions to
the fish fauna of Kerala meanwhile many species described earlier are
reported missing in recent years. Many fish species were collected only
once or twice by scientists. Detailed information on distribution, habitat,
feeding habits, reproduction, population size, etc. are available only with
regard to a very few fish species. A meaningful assessment on the
biodiversity status of the majority of freshwater fishes cannot be done for
want of sufficient data base and therefore, no suitable conservation and
management programmes are forthcoming for the protection and
preservation of the unique fish germplasm resources of Kerala. The
present study was conceptualised and undertaken mostly aiming at
bridging these gaps by generating an authentic data base on the
distribution, resource characteristics and bionomics of the threatened
fishes inhabiting the rivers of Kerala. Osteobrama bakeri (Day) is an endemic fish having a very highly restricted and fragmented distribution in Periyar, Chalakudy, Kabini,
Kallada and Meenachil rivers of Kerala. This belongs to vulnerable
category and is locally known as Mullanpaval which is valued as food
fish. Besides, due to its vibrant and attractive colouration and easiness
for domestication, it has great potential for being propagated as an
ornamental fish. Hitherto, no information is available on the bionomics
and resource characteristics of this species. Studies on detailed life
history traits are indispensable for fishery management, development of
captive breeding technique and implementation of various conservation
programmes. In the present study, a pioneer attempt is also made to
investigate the life history traits, resource characteristics, proximate
composition, etc. of O.baken'.
Description:
School of Industrial Fisheries
Cochin University of Science and Technology
Sareen Sarah, John; Reed, Robert H.; Bright Singh, I S(Cochin University Of Science And Technology, December , 2014)
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Abstract:
A study was undertaken to isolate phytase producers from
environment and to segregate the most highly efficient phytase producer and to
develop a bioprocess technology for commercial application. During this
process, a potential phytase producer Bacillus MCCB 242 was isolated and
characterized phenotypically and genotypically. Subsequently, phytase production
was optimized, the enzyme purified and characterized and an appropriate
downstream process also could be standardized.Precisely, through this work an environmental isolate Bacillus MCCB 242 could be brought out as phytase producer for commercial application. The enzyme production could be optimized and characterized, and an appropriate
downstream process standardized. Cytotoxicity studies revealed the enzyme
safe for feed application, especially in fish.
Roselin, Alex; Dr.Chandrasekaran,M(Cochin University Of Science And Technology, November 29, 2012)
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Abstract:
There exists a need for potential microorganism that could
facilitate effective bioremediation of crude oil pollutants in the
environment. Hence it was desired to isolate a potential bacterium from
marine sediment, which often experiences oil pollution and develop a
bioprocess for crude oil biodegradation. In the present study the sediment
deposits in the beach of Munakkal, Trichur dist, Kerala, collected
immediately after the major event Tsunami in 2004 was collected and
analyzed by enrichment culture technique towards isolation of potential
strains that could degrade crude oil and its fractions. From the results
obtained it was found that the sediment deposits harbor several bacteria
with potential for degrading hydrocarbons. However, among the strains
obtained, isolate no. BTTS 10 showed capabilities for utilizing both
alkanes and aromatic hydrocarbons and hence the same was selected for
further studies.
Description:
Department of Biotechnology, Cochin
University of Science and Technology
Joseph, P J; Dr.Ammini, Joseph(Cochin University of Science & Technology, April , 2007)
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Abstract:
The objective of this research is to study the feasibility of
bioremediating the oily sludge from a refinery site. Three different methods of
waste treatment were tried i.e. phytoremediation, land farming and microbial
enhanced oil separation in laboratory scale treatment systems. A multiprocess
approach by combination of phytoremediation, biostimulation and
microbial enhanced oil separation is also presented. The methods of analysis,
experimental procedure, and results are incorporated into five chapters of this
thesis entitled "Bioremediation of petroleum sludge through
phytoremediation, land farming and microbial enhanced oil separation.
Description:
School of Environmental Studies,
Cochin University of Science and Technology
Nimbalkar, V D; Dr.Alagaraja, K(Cochin University of Science And Technology, August , 1991)
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Abstract:
Fish, a natural resource, has received great attention
from all over the world. since it provides a cheap protein,
employment and income to the millions of people for centuries.
So fishermen, industrialist and multinationals are trying to
exploit the marine resources to their maximum benefit by
using modern craft, advance fishing equipments and efficient
gear. Fishery resources in the open system particularly in
oceans, were considered to be unlimited. However, recent
developments in the innovation of efficient craft and gear
using well tested material fitted with modern equipments that
have greatly enhanced the mobility of craft, agility of gear
and the ability of equipments to locate fishery resources
have proved otherwise. Hence as the exploitation increases
with more effort entering the fishery, the catch per unit
of fishing effort starts to decline due to the limitness
of the resources. The heavy fishing pressure in the recent
past led to commercial extinction of a number of stocks such
as. the North Sea herring, California sardine, Japanese
Sardine and Peruvian anchovy (FAO. 1968: Gulland, 1974).
In India, seer fish from Palk-Bay declined due to uncontrolled
fishing (Devaraj 1983).
Bismi, Nadh G; Dr. Ramachandran Nair, V K(Cochin University of Science and Technology, June , 2005)
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Abstract:
The present work is organized into six chapters. Bivariate extension of
Burr system is the subject matter of Chapter II. The author proposes to introduce a general structure for the family in two dimensions and present some properties of such a system. Also in Chapter II some new distributions, which are bivariate
extension of univariate distributions in Burr (1942) is presented.. In Chapter III, concentrates on characterization problems of different forms of bivariate Burr system. A detailed study of the distributional properties of each member of the
Burr system has not been undertaken in literature. With this aim in mind in Chapter
IV is discussed with two forms of bivariate Burr III distribution. In Chapter V the author Considers the type XII, type II and type IX distributions.
Present work concludes with Chapter VI by pointing out the multivariate
extension for Burr system. Also in this chapter the concept of
multivariate reversed hazard rates as scalar and vector quantity is introduced.
Description:
Department of Statistics, Cochin University of Science and Technology
Vidya,G; Dr.Rani,Joseph; Dr.Prathapan, S; Dr.Nampoori,V P N(Cochin University Of Science And Technology, October , 2012)
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Abstract:
Light emitting polymers (LEPs) are considered as the second
generation of conducting polymers. A Prototype LEP device based on
electroluminescence emission of poly(p-phenylenevinylene) (PPV) was first
assembled in 1990. LEPs have progressed tremendously over the past 20
years. The development of new LEP derivatives are important because
polymer light emitting diodes (PLEDs) can be used for the manufacture of
next-generation displays and other optoelectronic applications such as lasers,
photovoltaic cells and sensors. Under this circumstance, it is important to
understand thermal, structural, morphological, electrochemical and
photophysical characteristics of luminescent polymers. In this thesis the author
synthesizes a series of light emitting polymers that can emit three primary
colors (RGB) with high efficiency
Description:
Department of Polymer Science and Rubber Technology
Cochin University of Science and Technology
Nandhu, M S; Dr. Paulose, C S(Cochin University of Science and Technology, March , 2011)
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Abstract:
Parkinson's disease is a chronic progressive neurodegenerative movement
disorder characterized by a profound and selective loss of nigrostriatal dopaminergic
neurons. Our findings demonstrated that glutamatergic system is impaired during PD.
The evaluations of these damages have important implications in understanding the
molecular mechanism underlying motor, cognitive and memory deficits in PD. Our
results showed a significant increase of glutamate content in the brain regions of 6-
OHDA infused rat compared to control. This increased glutamate content caused an
increase in glutamatergic and NMDA receptors function. Glutamate receptor
subtypes- NMDAR1, NMDA2B and mGluR5 have differential regulatory role in
different brain regions during PD. The second messenger studies confirmed that the
changes in the receptor levels alter the IP3, cAMP and cGMP content. The alteration
in the second messengers level increased the expression of pro-apoptotic factors - Bax
and TNF-α, intercellular protein - α-synuclein and reduced the expression of
transcription factor - CREB. These neurofunctional variations are the key contributors
to motor and cognitive abnormalities associated with PD. Nestin and GFAP
expression study confirmed that 5-HT and GABA induced the differentiation and
proliferation of the BMC to neurons and glial cells in the SNpc of rats. We also
observed that activated astrocytes are playing a crucial role in the proliferation of
transplanted BMC which makes them significant for stem cell-based therapy. Our
molecular and behavioural results showed that 5-HT and GABA along with BMC
potentiates a restorative effect by reversing the alterations in glutamate receptor
binding, gene expression and behaviour abnormality that occur during PD. The
therapeutic significance in Parkinson’s disease is of prominence.
Description:
Department of Biotechnology, Cochin University of
Science and Technology
Susha,D; Thrivikraman,T(Cochin University of Science and Technology, September , 2004)
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Abstract:
The topology as the product set with a base chosen as all products of open sets in the individual spaces. This topology is known as box topology. The main objective of this study is to extend the concept of box products to fuzzy box products and to obtain some results regarding them. Owing to the fact that box products have plenty of applications in uniform and covering properties, here made an attempt to explore some inter relations of fuzzy uniform properties and fuzzy covering properties in fuzzy box products. Even though the main focus is on fuzzy box products, some brief sketches regarding hereditarily fuzzy normal spaces and fuzzy nabla product is also provided.
The main results obtained include characterization of fuzzy Hausdroffness and fuzzy regularity of box products of fuzzy topological spaces. The investigation of the completeness of fuzzy uniformities in fuzzy box products proved that a fuzzy box product of spaces is fuzzy topologically complete if each co-ordinate space is fuzzy topologically complete. The thesis also prove that the fuzzy box product of a family of fuzzy α-paracompact spaces is fuzzy topologically complete. In Fuzzy box product of hereditarily fuzzy normal spaces, the main result obtained is that if a fuzzy box product of spaces is hereditarily fuzzy normal ,then every countable subset of it is fuzzy closed. It also deals with the notion of fuzzy nabla product of spaces which is a quotient of fuzzy box product. Here the study deals the relation connecting fuzzy box product and fuzzy nabla product
Lakshmi Devi, P; Anekutty, Joseph(Cochin University Of Science And Technology, February 24, 2015)
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Abstract:
Among the decapod crustaceans, brachyuran crabs or the true crabs occupy a very significant position due to their ecological and economic value. Crabs support a sustenance fishery in India, even though their present status is not comparable to that of shrimps and lobsters. They are of great demand in the domestic market as well as in the foreign markets. In addition to this, brachyuran crabs are of great ecological importance. They form the conspicuous members of the mangrove ecosystems and play a significant role in detritus formation, nutrient recycling and dynamics of the ecosystem. Considering all these factors, crabs are often considered to be the keystone species of the mangrove ecosystem. Though several works have been undertaken on brachyuran crabs world –wide as well as within the country, reports on the brachyuran crabs of Kerala waters are very scanty. Most of the studies done on brachyuran fauna were from the east coast of India and a very few works from the west coast.
Among the edible crabs, mud crabs belonging to genus Scylla forms the most important due to their large size and taste. They are being exported on a large scale to the foreign markets like Singapore, Malaysia and Hong Kong. Kerala is the biggest supplier of live mud crabs and Chennai is the major centre of live mud crab export. However, there exists considerable confusion regarding the identification of mud crabs because of the subtle morphological differences between the species.In this context, an extensive study was undertaken on the brachyuran fauna of Cochin Backwaters, Kerala, India, to have a basic knowledge on their diversity, habitat preference and systematics. The study provides an attempt to resolve the confusion pertaining in the species identification of mud crabs belonging to Genus Scylla.
Diversity study revealed the occurrence of 23 species of brachyuran crabs belonging to 16 genera and 8 families in the study area Cochin Backwaters. Among the families, the highest number of species was recorded from Family Portunidae .Among the 23 crab species enlisted from the Cochin backwaters, 5 species are of commercial importance and contribute a major share to the crustacean fishery of the Cochin region. It was observed that, the Cochin backwaters are invaded by certain marine migrant species during the Post monsoon and Pre monsoon periods and they are found to disappear with the onset of monsoon. The study reports the occurrence of the ‘herring bow crab’ Varuna litterata in the Cochin backwaters for the first time. Ecological studies showed that the substratum characteristics influence the occurrence, distribution and abundance of crabs in the sampling stations rather than water quality parameters. The variables which affected the crab distribution the most were Salinity, moisture content in the sediment, organic carbon and the sediment texture. Besides the water and sediment quality parameters, the most important factor influencing the distribution of crabs is the presence of mangroves. The study also revealed that most of the crabs encountered from the study area preferred a muddy substratum, with high organic carbon content and high moisture content. In the present study, an identification key is presented for the brachyuran crabs occurring along the study area the Cochin
backwaters and the associated mangrove patches, taking into account the morphological characters coupled with the structure of third maxillipeds, first pleopods of males and the shape of male abdomen. Morphological examination indicated the existence of a morphotype which is comparable with the morphological features of S. tranquebarica, the morphometric study and the molecular analyses confirmed the non existence of S. tranquebarica in the Cochin backwaters.