Reema Kuriakose; Dr.Rosamma,Philip(Cochin University Of Science And Technology, November , 2012)
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Abstract:
the present study was undertaken with the following
objectives:
1. Isolation and identification of yeasts from Arabian Sea and Bay of
Bengal.
2. Molecular characterization of yeast isolates and phylogenetic analysis
3. Physiological and biochemical characterization of the isolates.
4. Proximate composition of yeast biomass and bioactive compounds.
The Thesis is comprised of six chapters. A general introduction to the topic is
given in Chapter1. Isolation and identification of marine yeasts are presented in
Chapter 2. Chapter 3 deals with molecular identification and physiological
characterization of Non- pigmented yeasts. Molecular identification and
physiological characterization of pigmented yeast is presented in Chapter 4.
Proximate composition of yeast biomass of various genera and their bioactive
compounds are illustrated in Chapter 5. A summary of the results of the present
study is given in Chapter 6. References and Appendices are followed
Description:
Department of Marine Biology, Microbiology and Biochemistry,
School of Marine Sciences, Cochin University of Science and Technology
Sarlin,P J; Dr.Rosamma,Philip(Cochin University of Science & Technology, 2005)
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Abstract:
The study revealed the potential of marine yeasts as a source of
single cell protein and immunostimulant for prawns. Prawns fed with
the selected marine yeasts were showing more growth compared to the
control feed and commercial feed. Yeasts being rich with proteins,
vitamins and carbohydrates serve as a growth promoter for prawns as
being evidenced in this study. The better performance of marine
yeasts, D. hansenii S8 and S100 and C. tropicalis S186 compared to S.
cerevisiae S36 as a feed supplement is worth investigating. Besides
being a rich nutritional source, yeasts act as immunostimulants by
virtue of its high carbohydrate (Beta, 1-3 glucan) and RNA content. Beta, 1-3
glucan, a cell wall component of yeasts /fungi is the most commonly
used immunostimulant in aquaculture. The present study shows that
even the whole cell yeast could serve as a good immunostimulant
when supplied through diet. Extraction of Beta-1,3 glucan results in the
removal of nutrients like proteins, vitamins etc. from the cell biomass.Utilization of the yeast biomass as such in the diet would help perform
a dual role as nutritional component and immunostimulant for
aquaculture applications.
Description:
Dept.of Marine Biology, Microbiology and Biochemistry,
Cochin University of Science and Technology
Sreedevi, Kutty N; Dr.Damodaran,R; Dr.Rosamma,Philip(Cochin University of Science & Technology, November , 2009)
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Abstract:
The present study provides an account of the occurrence and diversity of
marine yeasts in the slope sediments of Arabian Sea and Bay of Bengal. It also
gives a clear idea about the role of yeasts in the benthic realm of marine
ecosystem. The lipolytic potential of the organisms indicate the presence of rich
lipid moieties in the study area. The isolates, Candida sp. SD 302 and Pichia
guilliermondii SD 337 were proved to have potential oil degrading property and
can be employed as bioremediators of oil spill after further characterization. The
black yeasts isolated during the study area were found to have high commercial
value by virtue of the by-products obtained from them. The melanin and the
melanin degrading enzyme extracted from these organisms are potential
bioactive materials for application in cosmetology.
Description:
Department of Marine Biology, Microbiology and Biochemistry, Cochin University of Science and Technology
Smitha, Nair; Dr.Ramachandran,A(Cochin University of Science and Technology, July , 2007)
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Abstract:
This thesis studied the impact of market orietnation on business performance,
in the seafood industry, which is a unique situation wherein the firms were all
100% export oriented. The study was able to prove that in the context of the
seafood indsutry, implementation of market orientation principles will lead to
increase in business performance. The business performance variables were
measured under two heads, namely economic performance and non-economic
performance. Market orientation in Indian seafood firms was significantly and
postiively related to both the performance measures. Under the non-economic
performance, were the customer and employee consequences.Again market
orientation was positively and significantly related to both the consequences.Thus, the implication arising from the study is this: market
orientation in Indian seafood processing firms increases their business
performance. The implementation of market orientation will help the seafood firms in gaining competitve advantages in exporting. This in turn will result in
increased exports and the position of Indian seafood in the global market will
be strengthened. It will thus become a leading player in the global fish trade.
Next, the focus was on the effect of the antecedents on the market orientation
of a firm. It was seen that several factors were antecedents to the adoption of
market orientation principles. They include top management emphasis,
conflict, centralization and reward system. It is noted that top management
emphasis and support is vital to the market orientation programme. The top
management needs to adopt market oriented behaviour and reinforce the need
for being market oriented, for it to percolate down the line.Interdepartmental conflict is seen to affect market orientation positively. A
large percent of the Indian seafood firms are traditionally family-owned
companies, rather than professionally managed firms. This would result in
promulgation of old ideas of management whereby, conflict was seen as a
healthy exercise, which helped to build up each department's efficiency. But,
this view in the long run proves to be detrimental to the firm's performance
and must therefore be kept to a bare minimum, if any.Decentralisation of decision making facilitates the participation of the lower
level employees and builds up their motivational levels and commitment to the firm. Thus employees are encouraged to make their own decisions, so that they
can deal with customers faster and more efficiently.
Reward systems help improve an employee's morale, provide encouragement
and helps inculcate commitment and loyalty. It improves the employee's self
worth and fulfills his need for achievement. A satisfied employee works better,
produces more output and needs less supervision, and is happy, thereby
reducing costs to the company for replacement and retraining, if the employee
quits.Competitive intensity plays a moderating role on the market orientation business
performance. Thus in times of greater competition, the relationship
between market orientation and business performance grows stronger.
Thus, this thesis was successful in investigating a positive relationship between
business performance and market orientation.
Description:
School of Industrial Fisheries,
Cochin University of Science and Technology
Harish,C M; Dr.Sharma,G S(Cochin University Of Science And Technology, December , 1987)
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Abstract:
In the equatorial oceans, the meridional currents are
far less energetic than their zonal counterparts. The
response of the Equatorial Indian Ocean to the seasonal
reversals in the zonal wind field. is quite interesting and
unique. A modest attempt, considering the shortcomings in
the hydrographic data availability and distribution, is made
to evaluate the variability in the zonal transport of mass.
in_ both space and time. The peculiarities in its
hydrological regime imposed upon by the seasonally varying
winds is best appreciated when compared with the quasi permanent circulation characteristics of the Pacific and
Atlanti'c.The major features of the tequatorial mass
transport is outlined in the introductory chapter of this
thesis for the Pacific and Atlantic Mass transport studies
in the Indian Ocean, as can be seen from the earlier
studies, gis“ the least known and understood, though could
have captured the attention of both the experimentalist and
the theoretician alike. owing to its complexity. Since in
the Indian Ocean, the studies on the zonal mass transport
are limited and are confined to the equator only, an attempt
has been made to compute the mass transport extending from 5 N to 20 S.
Description:
Centre For Earth Science Studies,Cochin University Of Science And Technology
Cicily, P J; Dr.Samuel, C T(Cochin University of Science and Technology, May , 1984)
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Abstract:
The properties of synthetic fibres vary with thc inherent physical characteristics of the basic raw materials used mode of preparation of yarns and method of construction of twines. Since the synthetic fibres as maufactured from polymers which are synthesized from simple chemical units, the qualities of man-made fibres can he influenced by the process of manufacture and certain modifications can even be introduced at the processing stage to meet any specific requirement to a certain extent. Hence, an elaborate study of the properties of fish not twines produced has been taken up with a view to determining their suitability for various types of fishing gear with particular reference to conditions prevailing in India.
Jasmine, P; Dr.Saramma, Panampunnayil U(Cochin University Of Science And Technology, January 16, 2009)
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Abstract:
The Arabian Sea and the Bay of Bengal are both highly
dynamic ecosystems, due to the seasonally reversing monsoon winds,
but the processes affecting the mesozooplankton community remain
poorly understood. These are important basins exhibiting enhanced
biological production as a result of upwelling, winter cooling and
other episodic events such as eddies and gyres. Zooplankters are
primarily the prey for almost all fish larvae. Seasonal changes in the
biogeochemical processes can strongly affect zooplankton density
and distribution, which in turn, strongly affect the larval growth, and
consequently, the pelagic fish recruitment. It is clear that plankton
biomass and biogeochemical fluxes are not in steady state. Acoustic
data on mesozooplankton abundance suggests that they also exist in
the mesopelagic zone. Earlier studies were confined only to the upper
200 m and hence the structure of mesozooplankton community in the
deeper layers was not well known. Copepods are the dominant
mesoplankton group, and therefore the majority of the studies were
focused on them. The planktonic ostracods are the second major
crustacean group and at times, their swarms can outnumber all other
planktonic groups. The understanding of the community structure of
the ostracods is essential to establish their role in the marine food
web. Mesozooplankton is responsible for the vertical flux of organic
matter produced by phytoplankton and is assumed to be equivalent to
new production (Eppley & Peterson, 1979). Since the fate of newly
produced organic matter depends upon their consumers, the
zooplankton biomass must be estimated in size fractions or
taxonomic components to understand the vertical flux of organic
carbon. It is thus important to update our knowledge on different
groups of zooplankton on the basis of seasonal and temporal
distribution. The distribution in space and time is essential for
modeling the carbon cycling that structure the marine ecosystems
Description:
Department Of Marine Sciences,Cochin
University of Science and Technology
Rajendran, C G; Dr.Damodaran,R(Cochin University of Science & Technology, 1995)
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Abstract:
The investigation was aimed at establishing the effect of salinity on the culture performance of Peneus Indicus in pokkali fields and also to find out the growth performance of the shrimp at varying salinities. The experiments were laid out at Rice Research Station, Vyttila of Kerala Agriculture University in three fields of area 1000 m2 each. The results of the experiment clearly establish that shrimps when stocked at higher salinity (20-25 ppt) for 45 days has given higher growth, survival and production than those stocked at lower salinity (10-15 ppt) in all the above parameters even when the culture experiment was maintained for longer periods in lower salinity. In the prolonged culture experiments conducted for 120 days in 10-25 ppt salinity, the results were poorer than the short period culture in higher salinity and the production values similar to lower saline culture. This clearly establishes the importance of salinity as an ecological factor which will have profound influence in shrimp farming operations.
Description:
Division of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences, Cochin University of Science and Technology
Baiju,K R; Nambiar,C G(Cochin University of Science and Technology, September , 2006)
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Abstract:
The present research is aimed at studying the charnockites and associated rocks of the Madurai Granulite Block (MGB), especially in terms of their field settings, texture, mineralogy, and mineral chemistry analyzing their petrogenesis with the help of thermobarometrical studies and geochronological constraints. The mechanism of charnockitization by the influx of CO2 rich fluids and its relation to the graphite mineralization is actually a matter of discussion and study. The objectives of the present study are, to delineate petrological and structural relationship of charnockites and associated gneissic rocks, to study the field and petrogenetic aspects of graphite mineralization in the MGB, to establish and re-evaluate the P-T conditions of formation of the rocks with the aid of thermbarometric computations and to compare with the earlier studies, characterization of graphite with XRD, Raman spectroscopy and isotope studies together with a search in to its genesis and its relation to the high-grade metamorphism of the terrain, to evaluate the role of CO2 bearing fluids in the processes of charnockitization as well as in the genesis of graphite within the high-grade terrain and to delineate the metamorphic geochronology of selected rocks using ‘monazite dating’ technique with EPMA.
Krishnamurthy,V; Dr.Samuel, C T(Cochin University of Science and Technology, July , 1985)
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Abstract:
The thesis deals with the bacterial flora of the Cochin backwaters. Sediment and the prawns
caught from these backwaters in quantitative and qualitative terms, their growth in relation to temperature, their susceptibility to various antibiotics, their role in terms of food for juvenile prawns and the presence of bacteria of public health significance. According to the researcher such a comprehensive study would be of some relevance to shell-fish processing industries apart from its academic value. The effect of antibiotics on the bacteria and the utility of bacteria as food for the juvenile prawns are studied and presented in different chapters.
Description:
School of Marine Science, Department of Industrial fisheries, Cochin University of Science and Technology
Rathna Kala, R; Dr.Chandrika, V(Cochin University of Science and Technology, 2000)
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Abstract:
The present study on "Microbial production of antibiotics from mangrove ecosystem” was carried out for a period of one year in four selected Stations, Mangalavana, Narakkal, Puthuvyppu and light house area of Puthuvyppu (9°55' — 10°10'N and 76°10‘ - 76°20'E) from January to December 1991. Though much emphasis has been given to occurrence and distribution of actinomycetes, an attempt was also made to understand the distribution patterns of other micro flora in the sediments. Data on physico-chemical parameters were also collected to find out their relationship if any with the microflora. The principle interest of the present investigation is to determineseasonal variations of antagonistic actinomycetes in selected mangrove ecosystem. The microbial interrelationship in mangrove sediments was found out by constructing the ratio between bacteria and actinomycetes, bacteria and fungi, fungi and actinomycetes. In addition temperature, pH, salinity, dissolved oxygen and organic carbon were determined seasonally and their possible relationship was statistically analyzed and the results are presented. Isolated actinomycetes were subjected to cross streak assay to know their nature of antibiotic activity against test fish pathogens and crude antibiotics were extracted from selected isolates and their inhibitory activity is studied and the results are discussed.