Valsamma, Joseph; Dr.Ammini, Joseph(Cochin University of Science And Technology, April , 1998)
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Abstract:
The present research is based on two broader aspects of pollution assessment ,and
treatability of petroleum and petrochemical effluents by algae. The objectives of the investigation are to study the algal ecology and trophic status of an oil refinery effluent holding pond , isolate and identify pure cultures of algae, study the role of algae in petroleum and petrochemical effluent treatment, develop strains of algae tolerant to toxic effluents, study the biotreatment potential of the tolerant algal strains developed The thesis comprises of six chapters. The first chapter gives the significance and objectives of the present study. The second chapter describes the methodology, and results of studies on the algal ecology, and trophic status of the effluent holding pond of Cochin Refineries Ltd., Ambalamugal, Kochi. The third chapter deals with the isolation, and development of pure cultures of algae, the algal bioassay of the refinery effluent, and the analyses of Chitrapuzha river water. The analysis, and assessment of the algal growth potential of the petrochemical effluent of Hindustan Organic Chemicals Ltd., Ambalamugal, Kochi.
are summarised in the fourth chapter The fifth chapter deals with the algal growth potential in phenol and phenolic effluent, and subsequent absorption of phenol and total dissolved solids. The summary and conclusion of the present study are given in the sixth chapter.
Description:
Department of environmental studies, Cochin University of Science And Technology
Anit, Thomas M; Dr.Saramma, A V(Cochin University of Science And Technology, April , 2014)
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Abstract:
It is essential to understand how the distribution and composition of
microalgae as well as dynamics of HABs in economically important shelf seas
relate to the particular physico-chemical and biological properties of the water
column in which they live. In view of the importance of southwest coast of
India, which is considered as one of the most biologically productive areas in
the world, regular monitoring of distribution and abundance of microalgae
is important. The present work is concentrated on the estuarine and coastal
open sea stations along the southwest coast of India. In order to get further
insights into the abiotic factors governing bloom dynamics, the physicochemical
parameters that regulated three particular bloom events during
this period were studied. Bearing in mind the role of bacterial fauna
associated with algal blooms as a biological factor in regulating its
dynamics, isolation of bacteria associated with the algal blooms, their
identification, enumeration, and ability to produce extracellular enzymes
have been duly incorporated into this study
Description:
Department of Marine Biology, Microbiology and Biochemistry
School of Marine Sciences
Cochin University of Science and Technology
Manju, C; Dr.Pramod, K V(Cochin University of Science and Technology, April 19, 2010)
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Abstract:
Communication is the process of transmitting data across channel.
Whenever data is transmitted across a channel, errors are likely to occur.
Coding theory is a stream of science that deals with finding efficient ways to
encode and decode data, so that any likely errors can be detected and corrected.
There are many methods to achieve coding and decoding. One among them is
Algebraic Geometric Codes that can be constructed from curves.
Cryptography is the science ol‘ security of transmitting messages from
a sender to a receiver. The objective is to encrypt message in such a way that
an eavesdropper would not be able to read it. A eryptosystem is a set of
algorithms for encrypting and decrypting for the purpose of the process of
encryption and decryption. Public key eryptosystem such as RSA and DSS are
traditionally being prel‘en‘ec| for the purpose of secure communication through
the channel. llowever Elliptic Curve eryptosystem have become a viable
altemative since they provide greater security and also because of their usage
of key of smaller length compared to other existing crypto systems. Elliptic
curve cryptography is based on group of points on an elliptic curve over a finite
field.
This thesis deals with Algebraic Geometric codes and their relation to
Cryptography using elliptic curves. Here Goppa codes are used and the curves
used are elliptic curve over a finite field. We are relating Algebraic Geometric
code to Cryptography by developing a cryptographic algorithm, which includes
the process of encryption and decryption of messages. We are making use of
fundamental properties of Elliptic curve cryptography for generating the
algorithm and is used here to relate both.
Description:
Department ofComputer Application, Cochin University of Science and Technology
Lailaja, V P; Dr.Chandrasekaran,M(Cochin University of Science And Technology, July 27, 2007)
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Abstract:
Considering the potential of marine environment present study was
designed for the screening and isolation of a potential salt tolerant.
alkaline and thennotolerant lipase producing bacteria from the costal
belts of South India and consequent development of ideal bioprocess for
industrial production, purification characterisation and evaluation of the
potential of the lipase enzyme for various industrial applications 1. Screening and isolation of a potential lipase producing bacteria.
2. Optimization of various physicochemical factors in Submerged fennentation
for the production of alkaline lipase
3. Purification ofthe lipase enzyme
4. Characterisation of the enzyme
5. Evaluation of the enzyme for various industrial applications
Description:
Microbial Technology Laboratory
Department of Biotechnology
Cochin University of Science and Technology
Manjusha, K; Dr.Saramma, A V(Cochin University of Science and Technology, July , 2011)
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Abstract:
The thesis presents a detailed account of the alkaline protease produced by Vibrio sp.(V26) a mangrove isolate,and the application of this enzyme in different fields.The protease producer strain was identified on the basis of biochemical characteristice,putative virulence traits and 16S rRNA gene sequencing.The purification and characterization of the protease has been carried out. Along with this, an attempt has been made to identifiy the protease gene. The physical parameters as well as the media components influencing protease production were optimized using Response Surfce Methodology(RSM).The scale up of the application of the protease from Vibrio sp.(V26) in the dissociation of cells in animal cell culture,in the recovery of silver from used X-ray films as well as an ingredient in commercial detergents were investigated.
Description:
Dept.of Marine Biology,Microbiology and Biochemistry,Cochin University of Science and Technology
Sreeja, Chellappan; Chandrasekaran, M(Cochin University of Science and Technology, October , 2005)
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Abstract:
The thesis entitled “Alkaline Protease Production by Marine Fungus Engyodontium BTMFS 10”.Proteases are the single class of enzymes, which occupy a pivotal position with respect to their application in both physiological and commercial filed. Protease in the industrial market is expected to increase further in the coming year. The current trend is to use microbial enzymes since they provide a greater diversity of catalytic activities and can be produced more economically. Main objective of theses studies are the optimization of various physicochemical factors in the solid state fermentation for the production of alkaline protease enzyme, characterization of the enzyme, evaluation of the enzyme for various industrial application. The result obtained the during the course of theses study indicate the scope for the utilization of this study Marine Fungus E. Album for extra cellular protease production employing solid state fermentation
Meera, Venugopal; Dr.Saramma, A V(Cochin University Of Science And Technology, August 9, 2004)
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Abstract:
Microorganisms distributed in the marine and brackish environments
play an important role in the decomposition of organic matter and
mineralisation in the system (Seshadri and lgnacimuthu, 2002). Estuary is
one of the most productive ecosystems, at the same time one among the
least explored ecosystems on earth, which has immense potential as a
source of potent microorganisms that produce valuable compounds
particularly, enzymes such as proteases. In this scenario, it is very
appropriate to embark on finding novel alkaline protease producers from the
estuarine system. The area where the present investigation was carried out
is a part of the extensive estuarine system of South India viz. Cochin Estuary.
There is meagre knowledge regarding the microbial composition, particularly
the protease producers of Cochin Estuary. Hence, the present study has
been undertaken with the objective of finding novel alkaline protease
producing bacteria from Cochin Estuary
Description:
Department of Marine Biology, Microbiology and
Biochemistry, Cochin University of science and Technology
Bejoy, Thomas; Dr.Sugunan, S(Cochin University Of Science And Technology, September 22, 2004)
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Abstract:
The objective of the present work is to improve the textural and structural
properties of zeolite-Y through ion exchange with rare earth metals. We meant to
obtain a comparative evaluation of the physicochemical properties and catalytic
activity of rare earth modified H-Y, Na-Y, K-Y, and Mg-Y zeolites. Friedel-Crafts
alkylations of benzene with higher 1- olefins such as 1-octene, 1-decene, and 1dodecene
for the synthesis of linear alkylbenzene (LAB) have been selected for the
present study. An attempt has also been directed towards the correlation of the
enhancement in 2-phenylalkane formation to the improvement in the textural and
structural properties upon rare earth modification for the zeolite-Y. The present
method for LAB synthesis stands as an effective Green alternative for the existing
hydrofluoric acid technology
Description:
Department of Applied Chemistry
Cochin University of Science and Technology
Surekha, Mariam Varghese; Dr.Poulose Jacob, K(Cochin University of Science & Technology, March , 2008)
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Abstract:
Modern computer systems are plagued with stability and security
problems: applications lose data, web servers are hacked, and systems crash under
heavy load. Many of these problems or anomalies arise from rare program
behavior caused by attacks or errors. A substantial percentage of the web-based
attacks are due to buffer overflows. Many methods have been devised to detect
and prevent anomalous situations that arise from buffer overflows. The current
state-of-art of anomaly detection systems is relatively primitive and mainly
depend on static code checking to take care of buffer overflow attacks. For
protection, Stack Guards and I-leap Guards are also used in wide varieties.This dissertation proposes an anomaly detection system, based on
frequencies of system calls in the system call trace. System call traces represented
as frequency sequences are profiled using sequence sets. A sequence set is
identified by the starting sequence and frequencies of specific system calls. The
deviations of the current input sequence from the corresponding normal profile in
the frequency pattern of system calls is computed and expressed as an anomaly
score. A simple Bayesian model is used for an accurate detection.Experimental results are reported which show that frequency of system
calls represented using sequence sets, captures the normal behavior of programs
under normal conditions of usage. This captured behavior allows the system to detect anomalies with a low rate of false positives. Data are presented which show
that Bayesian Network on frequency variations responds effectively to induced
buffer overflows. It can also help administrators to detect deviations in program
flow introduced due to errors.
Description:
Department of Computer
Science, Cochin University of Science and Technology.
Mary, Kurien; Dr.Kuriakose, A P(Cochin University of Science And Technology, September 7, 2002)
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Abstract:
Earlier studies5773 in our laboratory showed that when a nucleophile
is used along with disulphide or sulphenamide accelerators the
vulcanization is accelerated greatly and the reaction mechanism is generally
nucleophilic in nature. However it was observed that it also changes with
the systems under review. The present study, deals with the use of
unsubstituted amidino thiourea i.e. aminoimino methyl thiourea(AMT) V in
the vulcanization studies of different elastorners and their blends. One of the
aims of this study was to get further proof with regard to the
theory of nucleophilic reaction mechanism in such binary systems.Mixes containing thiourea are used as controls. AMT is more nucleophilic
than TU and this is clear from the fact that the fonner can condense with
isothiocynate even in the absence of alkali while TU cannot". Also the
guanidinyl group in AMT can facilitate the polarization of the C=S bond
favouring a nucleophilic reaction
Description:
Department Of Polymer Science And Rubber Technology
Cochin University Of Science And Technology
Saji, K J; Dr.Jayaraj, M K(Cochin University of Science & Technology, October , 2008)
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Abstract:
This work
mainly concentrate to understand the optical and electrical properties of
amorphous zinc tin oxide and amorphous zinc indium tin oxide thin films
for TFT applications. Amorphous materials are promising in achieving
better device performance on temperature sensitive substrates compared
to polycrystalline materials. Most of these amorphous oxides are multicomponent
and as such there exists the need for an optimized chemical
composition. For this we have to make individual targets with required
chemical composition to use it in conventional thin film deposition techniques
like PLD and sputtering. Instead, if we use separate targets for
each of the cationic element and if separately control the power during the
simultaneous sputtering process, then we can change the chemical composition
by simply adjusting the sputtering power. This is what is done in co-sputtering technique. Eventhough there had some reports about thin
film deposition using this technique, there was no reports about the use
of this technique in TFT fabrication until very recent time. Hence in this
work, co-sputtering has performed as a major technique for thin film deposition
and TFT fabrication. PLD were also performed as it is a relatively
new technique and allows the use high oxygen pressure during deposition.
This helps to control the carrier density in the channel and also favours the
smooth film surface. Both these properties are crucial in TFT.Zinc tin oxide material is interesting in the sense that it does not contain
costly indium. Eventhough some works were already reported in ZTO based
TFTs, there was no systematic study about ZTO thin film's various optoelectronic
properties from a TFT manufacturing perspective. Attempts
have made to analyse the ZTO films prepared by PLD and co-sputtering.
As more type of cations present in the film, chances are high to form an
amorphous phase. Zinc indium tin oxide is studied as a multicomponent
oxide material suitable for TFT fabrication.
Description:
Department of Physics,
Cochin University of Science and Technology
Bindu, K; Dr.Vijayakumar, K P(Cochin University of Science & Technology, May , 2002)
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Abstract:
In the present work, we describe our efforts to develop device quality
CuInSe2, films through low cost, simple and eco-friendly hybrid techniques. The
most important point to be highlighted here is that the method fully avoids the use
of poisonous gases such as H2Se/Se vapour. Instead, selenisation is achieved
through solid state reaction between amorphous selenium and polycrystalline
metal layers resulting in both binary and ternary selenides. Thin films of
amorphous selenium (a-Se) used for this is deposited using Chemical Bath
Deposition (CBD). CulnSe2 films are prepared through the selenisation process.
Another PV material, indium selenide (In2Se3) thin films are also prepared using
this process.
Description:
Department of Physics, Cochin University of
Science and Technology