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
Hatha, A A M; Jyothy, S; Rinoy, Varghese; Arun Babu, V; Krishna, M P(Springer India, 2013)
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Abstract:
The production of heavy metals has increased quickly since the industrial
revolution. Heavy metals frequently form compounds that can be toxic, carcinogenic,
or mutagenic, even in very small concentrations. The usual techniques
of removing metals from wastewaters are in general expensive and
have many restrictions. Alternative methods of metal removal and recovery
based on biological materials have been measured. Among various agents,
the use of microbes for the removal of metals from industrial and municipal
wastewater has been proposed as a promising alternative to conventional
heavy metal management strategies in past decades. Thus, the present study
aims to isolate and characterize bacteria from soil, sediment, and waters of
metal-contaminated industrial area to study the zinc resistance patterns and
the zinc bioaccumulation potential of the selected microorganism. Zinc analysis
of the samples revealed that concentrations varying from 39.832 m g/L to
310.24 m g/L in water, 12.81 m g/g to 407.53 m g/g in soil, and 81.06 m g/g to
829.54 m g/g in sediment are present. Bacterial zinc resistance study showed
that tolerance to Zn was relatively low (<500 m g/ml). Ten bacterial genera
were represented in soil and 11 from water, while only 5 bacterial genera
were recorded from sediment samples. Bacillus, Pseudomonas , and
Enterobacter were found in soil, sediment, and water samples. Highly zincresistant
Bacillus sp. was selected for zinc removal experiment. Zinc removal
studies revealed that at pH 5 about 40% reduction occurs; at pH 7, 25%
occurs; and at pH 9, 50% occurs. Relatively an increased removal of Zinc
was observed in the fi rst day of the experiment by Bacillus sp. The metal
bioaccumulative potential of the selected isolates may have possible applications
in the removal and recovery of zinc from industrial ef fluents.
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).
Sunoj, S M; Unnikrishnan Nair, N(Calcutta: The Association,[1947]-, June , 1999)
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Abstract:
In this paper, a family of bivariate distributions whose marginals are weighted
distributions in the original variables is studied. The relationship between the failure rates
of the derived and original models are obtained. These relationships are used to provide
some characterizations of specific bivariate models
Description:
Bulletin of the Calcutta Statistical Association,Vol 57 (227-228),pp 179-194
A bivariate semi-Pareto distribution is introduced
and characterized using geometric minimization.
Autoregressive minification models for bivariate random
vectors with bivariate semi-Pareto and bivariate Pareto
distributions are also discussed. Multivariate
generalizations of the distributions and the processes are briefly indicated.
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
Bright Singh, I S; Lawman, D; Kutty, S N; Rosamma, Philip(May 14, 2013)
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Abstract:
Occurrence of black yeasts in the slope sediments of Bay of Bengal was investigated during FORV Sagar Sampada cruises 236 and 245. The black yeast population was found to be very scanty in the area and the isolates could be obtained from 200m to 1000m depth regions in the slope sediments. The isolates were identified as Hortaea werneckii by Internal Transcribed Spacer (ITS) sequencing. The biodegradation potential of these strains was found to be very high with all the strains exhibiting protease, lipase and amylase production. The optimum growth conditions were pH 8, salinity 30 ppt and temperature 30oC. The pigment melanin, in these organisms was identified to be of dihydroxynaphthalene type by NMR. The melanin was found to exhibit inhibitory activity against different human and fish pathogens. Melanin degrading enzyme could also be extracted from these organisms
Rani, Joseph(HUthig & Wepf Verlag Basel, December 12, 1986)
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Abstract:
Blends of polychloroprene rubber and plasticized polyvinylchloride have been prepared
in various compositions and their properties evaluated. The properties of the
blends show that they can be used to replace polychloroprene in many applications
Eby Thomas, Thachil; Benny Cherian, A(Wiley Periodicals, May , 2004)
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Abstract:
Block copolymers of unsaturated polyester
were prepared by condensation polymerization of hydroxyl
or carboxyl terminated liquid rubbers with maleic anhydride,
phthalic anhydride, and propylene glycol. The condensate
obtained was mixed with styrene monomer to get
an unsaturated polyester resin formulation. In this study,
copolymers of unsaturated polyesters with hydroxy terminated
polybutadiene, carboxy terminated nitrile rubber, and
hydroxy terminated natural rubber were prepared. Mechanical
properties such as tensile strength, tensile modulus,
elongation at break, toughness, impact strength, surface
hardness, abrasion resistance, and water absorption were
evaluated after the resin was cured in appropriate molds for
comparison with the control resin. The fracture toughness
and impact resistance of CTBN-modified unsaturated polyester
show substantial improvement by this copolymerization
without seriously affecting any other property
Description:
Journal of Applied Polymer Science, Vol. 94, 1956–1964 (2004)
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
Junaid, Bushiri M; Sajan, P; Vinod, R(Springer, September 13, 2013)
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Abstract:
Relatively oxygen-free mesoporous cubic ZnS
particles were synthesised via a facile solvo-hydrothermal
route using a water–acetonitrile combination. Boosted UV
emission at 349 nm is observed from the ZnS prepared by
the solvo-hydrothermal route. The increased intensity of this
UV emission is attributed to activation of whispering gallery
modes of almost elliptical microstructures made of porous
nanostructures.