Sumangala,R; Saseendran Pillai, P R(Cochin University OF Science and Technology, December , 1996)
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Abstract:
The main objective of carrying out this investigation is to develop suitable transducer array systems so that underwater pipeline inspection could be carried out in a much better way, a focused beam and electronic steering can reduce inspection time as well. Better results are obtained by optimizing the array parameters. The spacing between the elements is assumed to be half the wavelength so that the interelement interaction is minimum. For NDT applications these arrays are operated at MHz range. The wavelengths become very small in these frequency ranges. Then the size of the array elements becomes very small, requiring hybrid construction techniques for their fabrication. Transducer elements have been fabricated using PVDF as the active, mild steel as the backing and conducting silver preparation as the bonding materials. The transducer is operated in the (3,3) mode. The construction of a high frequency array is comparatively complicated. The interelement spacing between the transducer elements becomes considerably small when high frequencies are considered. It becomes very difficult to construct the transducer manually. The electrode connections to the elements can produce significant loading effect. The array has to be fabricated using hybrid construction techniques. The active materials has to be deposited on a proper substrate and etching techniques are required to fabricate the array. The annular ring, annular cylindrical or other similar structural forms of arrays may also find applications in the near future in treatments were curved contours of the human body are affected.
Vijayan, K K; Dr.Abdul Rasheed, T M(Cochin University Of Science And Technology, October 8, 2003)
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Abstract:
The central theme of this research concerns the study of vibrationally excited
molecules. We have used the local mode description of such vibrational states, and this
-model has now gained general acceptance. A central feature of the model is the
Wloealizafion of vibrational energy. A study of these high—energy localized states provides
example, becauseof this localization, overtone spectra, which measure the absorption of
T vibrational energy, are extremely sensitive to the properties of X-H bonds. We also use
-overtone spectra to study the conformation of molecules, i.e., the relative internal
orientation of their bonds. The thesis comprises six chapters
Description:
Department of Physics Cochin
University of Science and Technology
Lakshmanan, P T; Dr.Krishnan Nambisan, P N(Cochin University Of Science And Technology, January , 1982)
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Abstract:
The subsequent chapters of the Thesis deal with the toxic
effects of mercury, copper, zinc und~1ead on these bivalve
molluecs, their accumulation and distribution among various
organs of the animals and also the motel retention winstica
by the three species. Static biousauy tests have been conducted
in these studies. It was found that the concentrations of
the various metals studied in these organism are well below
the permitted level given far ease ahellfienes (crab and ehrimgi
and that these maliuscs are very good integrators ef trace
metals from their environment and may be used as an indicator
organism sf metal pallutaute.
The present investigutionsemphaeie the need for a clean
coastal water and gives a serious warning regarding the possiblc
route of heavy metals in ta human body thraugh marine food
chain.
Description:
School Of Marine Sciences
Cochin University Of Science And Technology
Namboothiripad,P V S; Dr.Parameswaran, Nair N(Cochin University of Science and Technology, November 1, 1979)
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Abstract:
The present study is intended to provide a new scientific approach to the solution of the worlds cost engineering problems encountered in the chemical industries in our nation. The problem is that of cost estimation of equipments especially of pressure vessels when setting up chemical industries .The present study attempts to develop a model for such cost estimation. This in turn is hoped would go a long way to solve this and related problems in forecasting the cost of setting up chemical plants.
Rosamma, Philip; Bright Singh, I S; Sudheer, N S(Elsevier, November 23, 2010)
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Abstract:
The objective of the study was to find out a natural way to fight white spot syndrome virus (WSSV) in cultured
shrimps, as the present scenario necessitated an organic remedy for the devastating pathogen in crustaceans.
Under this research programme seven mangrove plants were collected, identified and aqueous extracts
screened for their protective effect on the giant tiger shrimp Penaeus monodon against WSSV. The
experimental design consisted two modes of application, such as exposure of the virus to the extract and
injection challenge, and oral administration of the extract coated feed followed by oral challenge. All
experimental animals were monitored through a nested diagnostic PCR analysis. Of the seven mangrove
extracts screened aqueous extract from Ceriops tagal imparted total protection to shrimp from WSSV when
challenged by both methods. Shrimps administered with the aqueous extract from C. tagal were devoid of
virions. The HPLC fingerprint of the aqueous extracts from C. tagal showed more than 25 peaks and 7 of them
were larger and well separated. Preliminary phytochemical analysis revealed the presence of alkaloids,
flavonoids, polyphenolics, cardiac glycosides, saponins and sterols. The study indicated suitability of the
aqueous extract of C. tagal as a possible prophylaxis for WSSV infection in shrimp. This is the first report on the
anti WSSV property of the mangrove plant C. tagal
Bright Singh, I S; Sudheer, N S; Rosamma, Philip(Elsevier, November 23, 2010)
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Abstract:
The objective of the study was to find out a natural way to fight white spot syndrome virus (WSSV) in cultured
shrimps, as the present scenario necessitated an organic remedy for the devastating pathogen in crustaceans.
Under this research programme seven mangrove plants were collected, identified and aqueous extracts
screened for their protective effect on the giant tiger shrimp Penaeus monodon against WSSV. The
experimental design consisted two modes of application, such as exposure of the virus to the extract and
injection challenge, and oral administration of the extract coated feed followed by oral challenge. All
experimental animals were monitored through a nested diagnostic PCR analysis. Of the seven mangrove
extracts screened aqueous extract from Ceriops tagal imparted total protection to shrimp from WSSV when
challenged by both methods. Shrimps administered with the aqueous extract from C. tagal were devoid of
virions. The HPLC fingerprint of the aqueous extracts from C. tagal showed more than 25 peaks and 7 of them
were larger and well separated. Preliminary phytochemical analysis revealed the presence of alkaloids,
flavonoids, polyphenolics, cardiac glycosides, saponins and sterols. The study indicated suitability of the
aqueous extract of C. tagal as a possible prophylaxis for WSSV infection in shrimp. This is the first report on the
anti WSSV property of the mangrove plant C. tagal
Zeena, Hamza P; Dr.Thomas, Kurian(Cochin University of Science And Technology, October , 2012)
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Abstract:
Biodegradation is the chemical degradation of materials brought
about by the action of naturally occurring microorganisms. Biodegradation
is a relatively rapid process under suitable conditions of moisture, temperature
and oxygen availability. The logic behind blending biopolymers such as starch
with inert polymers like polyethylene is that if the biopolymer component is
present in sufficient amount, and if it is removed by microorganisms in the
waste disposal environment, then the base inert plastic should slowly
degrade and disappear.
The present work focuses on the preparation of biodegradable and
photodegradable blends based on low density polyethylene incorporating small
quantities of ionomers as compatibilizers.
The thesis consists of eight chapters. The first chapter presents an
introduction to the present research work and literature survey. The details of
the materials used and the experimental procedures undertaken for the study
are described in the second chapter. Preparation and characterization of low
density polyethylene (LDPE)-biopolymer (starch/dextrin) blends are
described in the third chapter. The result of investigations on the effect of
polyethylene-co-methacrylic acid ionomers on the compatibility of LDPE
and starch are reported in chapter 4. Chapter 5 has been divided into two
parts. The first part deals with the effect of metal oxides on the
photodegradation of LDPE. The second part describes the function of
metal stearates on the photodegradation of LDPE. The results of the
investigations on the role of various metal oxides as pro-oxidants on the
degradation of ionomer compatibilized LDPE-starch blends are reported in
chapter 6. Chapter 7 deals with the results of investigations on the role of
various metal stearates as pro-oxidants on the degradation of ionomer
compatibilized LDPE-starch blends. The conclusion of the investigations is
presented in the last chapter of the thesis.
Description:
Department of Polymer Science and Rubber Technology,
Cochin University of Science and Technology
Poulose Jacob,K; Binsu, Kovoor C; Supriya, M H(First International Conference on Computational Science and Engineering (CSE-2013), 2013)
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Abstract:
Biometrics has become important in security applications. In comparison with many other
biometric features, iris recognition has very high recognition accuracy because it depends on
iris which is located in a place that still stable throughout human life and the probability to find
two identical iris's is close to zero. The identification system consists of several stages including
segmentation stage which is the most serious and critical one. The current segmentation
methods still have limitation in localizing the iris due to circular shape consideration of the
pupil. In this research, Daugman method is done to investigate the segmentation techniques.
Eyelid detection is another step that has been included in this study as a part of segmentation
stage to localize the iris accurately and remove unwanted area that might be included. The
obtained iris region is encoded using haar wavelets to construct the iris code, which contains
the most discriminating feature in the iris pattern. Hamming distance is used for comparison of
iris templates in the recognition stage. The dataset which is used for the study is UBIRIS
database. A comparative study of different edge detector operator is performed. It is observed
that canny operator is best suited to extract most of the edges to generate the iris code for
comparison. Recognition rate of 89% and rejection rate of 95% is achieved
Description:
Computer Science & Information Technology (CS & IT)
Beena, C; Padmakumar, P K; Archana, S N(Journal ot'Librar)= and Information Management, June , 2010)
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Abstract:
Open access iiiovemerit and open source software movement plays an important
role in creation of knowledge, knowledge management and knowledge
dissemination. Scholarly communication and publishing are increasingly taking
place in the electronic environment. With a growing proportion of the
scholarly record now existing only in digital format, serious issues regarding
access and preservation are being raised that are central to future scholarship.
Institutional Repositories provide access to past. present and future scholarly
literature and research documentation; ensures its preservation; assists users in
discovery and use; and offers educational programs to enable users to develop
lifelong literacy. This paper explores these aspects on how IR of Cochin
University of Science & Technology supports scientific community for knowledge
creation. knowledge Management, and knowledge dissemination.
Description:
Journal Of Library and Information Management Vol.1 No.1,January -June 2010,PP 38-44
The present work investigates on the applicability of metal promoted sulphated zirconia
catalysts for the hydroxylation of phenol under mild conditions. The percentage conversion
and product distribution was highly sensitive towards the reaction parameters like the catalyst
composition, reaction temperature, H202/ phenol ratio and the solvent used.
The present study is an attempt to find out the ralation between RNA/DNA ratio, protein,percentage growth rate and specific growth rate of prawn,Penaeus indicus with respect to Nervous system, Eyestalk and Muscle tissues during ontogenesis. We have isolated and purified a natural agglutinin in the hemolymph of P.indicus with antigenecity, agglutinating, hemolytic and antibacterial properties. The influence of growth and environmental parameters on the level of agglutinin in the hemolymph was studied. Agglutinin concentration during normal growth process was compared. The agglutinin concentration in the hemolymph was quantified through developing ELISA, which is useful in health monitoring studies of individual species. Complete amino acid composition of both the subunits of P.indicus agglutinin were analysed. P.indicus agglutinin showed similarity to those proteins having antigenecity,hemolytic and agglutinating properties.Hence, agglutinin was considered as a natural defence protein in the hemolymph of P.indicus responsible for immune surveillance. The humoral defence mechanism of agglutinin was a co-operative effort with hemocytes and complement system. The composition of isolated agglutinin of P.indicus amino acids will be helpful in the synthesis of new antibacterial analogues which can be used against disease causing organisms.
Description:
Dept. of Biotechnology, Cochin University of Science and Technology
Bright Singh, I S; Somnath Pai, S; Deepa, G D; Surekhamol, I S; Sreelakshmi, B; Varghese, S(The Society for Applied Microbiology, October 12, 2013)
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Abstract:
Of 33 phages isolated from various shrimp farms in Kerala, India, six were
segregated to have broad spectrum lytic efficiency towards 87 isolates of Vibrio
harveyi with cross-infecting potential to a few other important aquaculture
pathogens. They were further tested on beneficial aquaculture micro-organisms
such as probiotics and nitrifying bacterial consortia and proved to be
noninfective. Morphological characterization by transmission electron
microscopy (TEM) and molecular characterization by RAPD and SDS-PAGE
proved them distinct and positioned under Caudovirales belonging to
Myoviridae and Siphoviridae
Manjusha,K P; Dr.Saleena, Mathew(Cochin University of Science and Technology, April , 2011)
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Abstract:
The present study is aimed at the isolation and characterization of glycosaminoglycans from selected tissues of two commercially important species of cephalopods;squid,Loligo duvauceli and cuttlefish,Sepia pharaonis,keeping in view of the aforementioned benefits on the utilization of waste generated during processing.The cephalopod GAGs may also be expected to have an effect on various physiological functions based on the results obtained from GAGs from other sources.In addition,knowledge of the chemical structure of macromolecules that constitute major components of extracellular matrix(ECM) will be helpful in understanding their interactions with other matrix components.
Description:
School of Industrial Fisheries,
Cochin University of Science and Technology