Lailamma,Jose; Dr.Rani,Joseph(Cochin University of Science and Technology, January 30, 1996)
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Abstract:
The main objective of the present study was to
explore ways of making latex products more cost effective
and versatile. Polyethylene glycol was identified as a
surface active agent in latex compounds which improves the
filler-polymer interaction and also distributes the filler
more uniformly. The use of such surface active agents can
develop filled latex products with improved mechanical
properties at a lower cost. In this study dispersions of carbon black and silica were successfully added to NR latex under high speed stirring without destabilizing latex.
Description:
Department
of Polymer Science and Rubber Technology, Cochin University of Science and Technology
Mary,Joseph; Dr.George, K E(Cochin University of Science and Technology, March 19, 1998)
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Abstract:
The primary aim of this work has been to develop a cost effective
process that can be operated at room temperature for developing latex
reclaim with superior mechanical properties. With this objective in mind
the researcher proposes to study the reclaiming action of four different chemicals on
latex products waste. Waste latex products are chosen because it has a
higher potential to generate good quality rubber hydrocarbon since all
latex products are based on either high quality concentrated latex or
creamed latex. Moreover, all latex products are only lightly crosslinked
and not masticated and hence not mechanically degraded. The author also
proposes to fully explore the possible application of latex reclaim in various
fields..
Description:
Department of Polymer
Science and Rubber Technology, Cochin University of
Science and Technology
Pushpakumari,K N; Dr.Paul, Vatakencherry A(Cochin University of Science and Technology, September , 1987)
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Abstract:
The thesis deals with the different properties and characteristics of oil of lemon grass.. The oil of lemongrass (Cymbopogon flexuosus) is one of the most important essential oils. It will continue to be one of the "big ten" of our essential oils1. Lemongrass oil is obtained from certain species of grasses of the genus cymbopogon. The genus consists of about 80 species, 10 to 12 of which are known to occur in India. Lemongrass is a stoloniferous plant. The plant grows wild in many tropical andsemitropical parts of Asia, Africa and in parts of Central America and South America. For the extraction of the oil however only cultivated lemongrass is employed. The trade distinguishes two Principal types of lemongrass oil, viz. the East Indian Oil and West Indian Oil. There was much confusion, years ago, about the taxonomy of the plants which yield theEast Indian and West Indian types of lemongrass oil, however Stapf2 ended the long controversy of identifying the plant yielding the East Indian type oil as Cymbopogon flexuosus (D.C.) Stapf and the plant yielding the West Indian type oil as Cymbopogon citrates (D.C.) stapf. The 2 plants have_been named variously also Andropogon nardus var. Flexuosus Hack or A. citratus D.C. respectively
Description:
Department of Applied Chemistry, Cochin
University of Science and Technology
Madhavan Nanpoothiri, K; Dr.Ashok, Pandey(Cochin University Of Science And Technology, July 8, 1997)
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Abstract:
The thesis comprises a set of experiments mainly focused on the
improvement of L-glutamic acid fennentation. Much attention has been given to
use of locally available raw materials, culturing the organism on inert solid
substrates and also immobilization of the bacterial cells from the view point of long
term utilization of biocatalyst and continuous operation of the stabilized system.
Studies were also carried out for the down stream processing for the extraction and
purification of L-glutamic acid. An attempt was made to study the morphological
features of the microorganism including the cell premeability. In relation with the
accumulation of glutamic acid within the cells an approach was made to study the
behaviour of the Brevibacterium cells when they are exposed to hyper osmotic
environment. Attempts were also made to study the requirement of iron and
production of siderophores by this microbial strain. The search for a suitable
nitrogen source for glutamate fermentation ended with a promising result that they
got a potent urease activity and it can be utilized for many biotransfonnation
studies.
The entire thesis is presented in three sections, viz. introductory section,
experimental section and the concluding section
Description:
Department Of Biotechnology,Cochin University Of Science And Technology
Manohar, Chandge S; Dr. Paul, Raj R(Cochin University of Science And Technology, April , 1987)
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Abstract:
Recent studies with prawns indicate that their growth, metamorphosis, maturation and moulting are affected by the typo and level of lipids supplied in the diets. Despite the
recognition of the importance of lipids in the diets of prawns there is no information on the essentiality and quantitative lipid requirements of Indian penaeid prawns. Therefore during the present study about 24 laboratory experiments were conducted to determine the essentiality and dietary requirements of total lipids, phoapholipida, fatty acids cholestrol, and to ascertain the nutritional value of natural lipid sources for the larvae, post-larvae tad juveniles of one of the most suitable cultivable species of panaeid prans. All the experiments were conducted in the laboratory following standard procedures, using isonitrogen and approaximately
isocaloric purified diets. Changes were made in tha ingridients as required for specific requirements. For the larvae diets of particle size < 37) were fed, For the postlarvae
and juveniles pellet feed was given. while data on survival and growth of larvae and pout-larvae 1-10 were recorded, data were collected on the survival, growth, food conversion ratio, protein efficiency ratio and biochemical composition at the body for post-larva 11-25 and juveniles. The influence ot fatty acid pattern of dietary lipid sources on the fatty acids profile of prawns were also studied in the case of juvenile prawns. Analysis of variance andleast significant differences
test were employed to determine the significant differences between treatments in the observed parameters with the help of a newlett Packard master computer.
Description:
Central marine fisheries research institute, Cochin University of Science And Technology
Balachandran, M; Sivasankara Pillai,V N(Cochin University of Science and Technology, October , 2004)
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Abstract:
The current water treatment technology is oriented towards the removal of contaminants, mostly organic compounds, by activated carbon. Activated carbons are classified as Granular Activated Carbons (GAC) and Powdered Activated Carbons (PAC) on the basis of the particle size of the carbon granules. Powdered carbons are generally less expensive than granular carbon, operating costs with powdered carbon could be lower. Though powdered activated carbon has many advantages over granular carbon, its application in large-scale separation process is limited by difficulty in recovery and regeneration. Deposition of magnetic iron oxide on carbon particles provides a convenient way of recovering the spent carbon from process water. The study deals with the preparation and physico-chemical characterization of magnetic iron oxide loaded activated carbons. The evaluation of absorption properties of magnetic iron oxide loaded activated carbon composites. The target molecules studied were phenol, p-nitro phenol and methylene blue. The feasibility of magnetic separation of iron oxide loaded activated carbons were studied and described in this thesis.
Ajithkumar, C M; Dr.Babu, Joseph K(Cochin University of Science and Technology, 1986)
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Abstract:
In 1931 Dirac studied the motion of an electron in the field of a magnetic monopole and found that the quantization of electric charge can be explained by postulating the mere existence of a magnetic monopole. Since 1974 there has been a resurgence of interest in magnetic monopole due to the work of ‘t’ Hooft and Polyakov who independently observed that monopoles can exist as finite energy topologically stable solutions to certain spontaneously broken gauge theories. The thesis, “Studies on Magnetic Monopole Solutions of Non-abelian Gauge Theories and Related Problems”, reports a systematic investigation of classical solutions of non-abelian gauge theories with special emphasis on magnetic monopoles and dyons which possess both electric and magnetic charges. The formation of bound states of a dyon with fermions and bosons is also studied in detail.
The thesis opens with an account of a new derivation of a relationship between the magnetic charge of a dyon and the topology of the gauge fields associated with it. Although this formula has been reported earlier in the literature, the present method has two distinct advantages. In the first place, it does not depend either on the mechanism of symmetry breaking or on the nature of the residual symmetry group. Secondly, the results can be generalized to finite temperature monopoles.
Description:
Department of Physics, Cochin University of Science and Technology
Balachandran,T; Dr.Kurian, C V(Cochin University of Science and Technology, August , 1980)
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Abstract:
Plankton community, drawn from a vary wide variety of animal phyla, formed
the basic food supply of marine life and indicators of water mass. The term
meroplankton generally referred to that portion of the zooplankton which is
transient in nature, remaining rest of their lives in the nektonic or benthic
environment. This group was selected for intensive studies, considering the role
of meroplankton in the economy of the sea and the scarcity of literature on them
from the Indian Ocean. The preser .udy besides providing information regarding
the fixation and preservation !e _ iniques and biochemical aspects of tropical
meroplankton, also consolidates information regarding their zoogeography in the
Indian Ocean region, with a view to amplifying the limited information available
from this area.
The distribution studies are based on the collections made during the International
Indian Ocean Expedition (1960-65), whereas the material for preservation and
biochemical studies was collected from the coastal waters during 1968-1978.
Salient features:- 2% of formaldehyde buffered with 2% borax, added to the
plankton in the ratio of 9:1 was found the best fixative. On fixation the plankton
underwent shrinkage due to loss of 15 to 87% water. Addition of antioxidants
prevented colour fading. Narcotization by different specific reagents prior to
fixation reduced distortions due to violent reaction and improved morphological
conditions. One percent formaldehyde solution in sea water buffered with borax
or neutralised with calcium carbonate perfectly preserved majority of meroplankton.
Equally good was one percent propylene phenoxetol buffered with borax.
Biochemical compostion of vaioous taxa showed variations according to their
age class, size groups metamorphosing stage, feeding mechanism, type of
organism fed and time of collection.
General distribution studies of 4 meroplankton taxa - Anthozoan larvae, cirripedia
larvae, sipunculoid larvae and gastropod larvae stowed abundance in the coastal
areas especially during the SW monsoon period. Based on the larval distribution
different zoo-geographical areas in the Indian Ocean are differentiated.
Description:
School of Marine Science, Cochin University of Science and Technology
Nancy, Mathew; Dr.Prathapachandra Kurup,M R(Cochin University of Science and Technology, June , 2011)
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Abstract:
Studies on transition metal complexes have achieved a great interest due to their versatile applications.The convenient route for synthesis,the nature of ligands and stability of metal complexes has significant contributions in their applications in medicine,biology,catalysis and photonics.The present work deals wth the synthesis and characterization of metal complexes of some tridentate acylhydrazones .Hydrazones are promising ligands in coordination chemistry with interesting binding modes and applications.The acylhydrazones chosen for the current study are capable of forming complexes in different forms through tautomerism.
Description:
Department of Applied Chemistry,Cochin University of Science and Technology
Sunny, M C; Dr.George, K E(Cochin University of Science & Technology, July , 2006)
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Abstract:
Plasticized poly(vinyl chloride) (pPVC), although a major player in the medical field, is at present facing lot of criticism due to some of its limitations like the leaching out of the toxic plasticizer, di ethylhexyl phthalate (DEHP) to the medium and the emission of an environmental pollutant,dioxin gas,at the time of the post use disposal of PVC Products by incineration. Due to these reasons, efforts are on to reduce the use of pPVC considerably in the medical field and to find viable alternative materials. The present study has been undertaken in this context to find a suitable material for the manufacture of medical aids in place of pPVC. The main focus of this study has been to find out a non-DEHP material as plasticizer for pPVC and another suitable material for the complete repalcement of pPVC for blood/ blood component storage applications.Two approaches have been undertaken for this purpose-(1)the controversial plasticizer, DEHP has been partially replaced by polymeric plasticizers(2) an alternative material, namely, metallocene polyolefin (mPO) has been used and suitably modified to match the properties of flexible PVC used for blood and blood component storage applications.
Description:
Department of Polymer Science and
Rubber Technology, Cochin University of Science and Technology
Jiya, Jose; Dr. Shanta, Achuthankutty(Cochin University of Science And Technology, February , 2014)
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Abstract:
The Cochin estuary (CE), which is one of the largest wetland ecosystems,
extends from Thanneermukkam bund in the south to Azhikode in the north. It
functions as an effluent repository for more than 240 industries, the characteristics of
which includes fertilizer, pesticide, radioactive mineral processing, chemical and
allied industries, petroleum refining and heavy metal processing industries
(Thyagarajan, 2004). Studies in the CE have been mostly on the spatial and temporal
variations in the physical, chemical and biological characteristics of the estuary
(Balachandran et al., 2006; Madhu et al., 2007; Menon et al., 2000; Qasim
2003;Qasim and Gopinathan 1969) . Although several monitoring programs have been
initiated in the CE to understand the level of heavy metal pollution, these were
restricted to trace metals distribution (Balachandran et al., 2005) or the influence of
anthropogenic inputs on the benthos and phytoplankton (Madhu et al., 2007;Jayaraj,
2006). Recently, few studies were carried out on microbial ecology in the
CE(Thottathil et al 2008a and b;Parvathi et al., 2009and 2011; Thomas et al., 2006;Chandran and Hatha, 2003). However, studies on metal - microbe interaction are
hitherto not undertaken in this estuary. Hence, a study was undertaken at 3 sites with
different level of heavy metal concentration tounderstand the abundance, diversity and
mechanisms of resistance in metal resistant bacteria and its impact on the nutrient
regeneration. The present work has also focused on the response of heavy metal
resistant bacteria towards antibacterial agent’s antibiotics and silver nanoparticles
Description:
CSIR-National Institute of Oceanography
Regional Centre
Kochi