Jalaja, Malayan J; Dr.Sugunan, S(Cochin University of Science and Technology, December , 1994)
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Abstract:
The rare earths have provided fascinating field
for chemists confronted with problems of their separation
and purification. The rare earths become available in
relatively pure form in recent years due to the development
of efficient separation methods, largely as a byproduct of
the atomic energy programmes of various countries. The
rare earths often called lanthanides from La (Z=57) to Lu
(Z=7l) display subtle variation of properties through the
series, while the differences become appreciable for the
elements that are farther apart.
Description:
Department of
Applied Chemistry, Cochin University of Science and
Technology
Ramankutty, C G; Dr.Sugunan, S(Cochin University of Science & Technology, November , 2000)
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Abstract:
The present study describes the surface properties and catalytic activities of
ferrospinels containing Co, Ni and Cu prepared by the low temperature route. Various
physico-chemical methods have been adopted to characterise the systems. The reactions
carried out are the Friedel-Crafts benzoylation of aromatics and the cyclohexanol
decomposition. We have attempted the sulphate modification of the ferrites and have
studied the surface and catalytic properties of the sulphated analogues.The work is presented in six chapters, the last chapter giving the summary and
conclusions of the results presented earlier. Our samples prove as potential catalysts for
the benzoylation of aromatics , for which truly heterogeneous catalysts are rare. Again ,
the materials show remarkable dehydration/dehydrogenation activities during
cyclohexanol decomposition. There is plenty of scope for research in this field, especially
in the development of environmentally benign catalysts for acylation reactions.
Description:
Department of Applied Chemistry,
Cochin University of Science and Technology
Nishamol,Kanat; Sugunan, S(Department of applied chemistry, 2002)
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Abstract:
In recent years considerable advances have been achieved in the study of the surface structure and mechanism of action of environmentally benign heterogeneous catalysts. The study entitled as surface properties and catalytic activity of manganese ferrospinels. In the present study we have prepared manganese ferrospinels of general formula Mn(1-x)BxFe2O4 via low temperature controlled co-precipation method. The study employed low temperature co-precipitation method for the preparation ofMn(1-x)BxFe2O4 specimens, where B is a metal cation such as Cr,Co, Ni,Cu and Zn. The catalytic activities of the systems were investigated for liquid-phase benzoylation of aromatic compounds and phenol hydroxylation and for vapour-phase reactions such as aniline alkylation, phenol methylation and ODH of ethylbenzene. The different series of manganese ferrites are proved to be excellent catalysts for various industrially important reactions such as Friedel-crafts benzoylation of aromatic compounds, methylation of aniline and phenol, hydroxylation of phenol and oxidative dehydrogenation of ethylbenzene. Due to the tightening of the environmental regulations, production of diphenols from phenol hydroxylation and reduction of phenolic pollutants in waste waters using these catalysts can be a promising approach because it demands only simple techniques and produce little environmental pollution.
Renuka, N K; Dr.Sugunan, S(Cochin University of Science & Technology, November , 2000)
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Abstract:
An investigation on the physical and chemical characterisation of rare earth oxide
supported vanadia is attempted in the present study. La2O3, Sm2O3 and DY2O3 serve the
purpose of supports. Supported catalysts were prepared and characterised using various
physico chemical techniques. A detailed investigation of acid base properties is also
carried out. The nature of interaction of vanadia with lanthanide oxide is discussed and
the effect of vanadia loading on the activity of the systems towards reactions of industrial
importance is explored.
Description:
Department of Applied Chemistry,
Cochin University of Science and Technology
Vijayakumar, K P; Dr.Purushothaman, C(Cochin University of Science and Technology, May 28, 1984)
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Abstract:
The thesis aims to present the results of experimental investigations on the changes of optical properties of metallic thin films due to heating. The parameters which are measured are reflectivity, refractive indices and the ellipsometric quantities V and A . The materials used in the studies are metals like Silver, Aluminium and Copper. By applying the optical method the interdiffusion taking place in multilayer
‘films of Aluminium and Silver has also been studied. Special interest has been taken to reveal the mechanisms of the hillock growth and surface roughness caused by heating and their relation with the stress in the film
Description:
Department of Physics, Cochin University of Science and Technology
Aneesh, V Pillai; Dr. V. S. Sebastian(Cochin University of Science and Technology, June 28, 2013)
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Abstract:
The advancements in medical science and technology have proved to be a boon
to mankind. At the same time they have raised numerous challenges before the legal
systems of the world. One such advancement is that of assisted human reproductive
technologies and particularly surrogacy, which have given a new meaning to the
concept of procreation. These technologies have made it possible for individuals to
beget a genetically related child with the help of a third party and without sexual
intercourse. Among all the assisted human reproductive technologies, the practice of
surrogacy, in which women agree to have their bodies used to undergo a pregnancy
and give birth to a baby for another, has raised various legal and human right
controversies and diverse legal responses all over the world. India has particularly
become a top destination for individuals who wish to beget a child through surrogacy
and hence it is imperative for the Indian government to address the challenges posed
by surrogacy. This study is an attempt to examine the need and importance of
surrogacy practices and the conflicting legal and human rights issues raised by
surrogacy in contemporary times. It also examines the adequacy of existing legal
framework in India and attempts to provide pragmatic solutions for regulating
surrogacy and protecting the interests of various stakeholders involved in surrogacy.
Nowshad, M; Dr.Kuttyamma, V J; Dr.Menon,N R(Cochin University of Science and Technology, January , 1998)
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Abstract:
The present study aims at surveying the coral lagoons of four islands viz.
Kavarathi, Kalpeni, Kadmat and Agathi, which include quantitative survey of the
major benthic forms using Line Intercept Transect (LIT) technique and
hydrographical study of these lagoon waters The distribution of PHC in the
lagoons has also been followed to understand, the effects of introduction of flat
bottomed ferry boats to the islands.From a biological monitoring stand point for the assessment of manmade disturbance of the coral reefs, it IS highly essential to identify faunal assemblages which will contain 'flag-stones' specIes as indicators of such disturbances. Among the known faunal assemblages In coral reefs the most
diverse groups of sensitive species belongs to bryozoan assemblage. Therefore, the
most common species of bryozoans distributed along the atolls and reef flats
were collected and described in this work Along with this, bryozoans
associated with coral from other parts of Indian ocean have also been added so as
to provide a comprehensive picture of the distribution of bryozoans in the coral
reefs.
Description:
Department of Marine Biology, Cochin University of Science and Technology
Liya, Jayalal; Ramachandran, A(Cochin University of Science and Technology, May , 2014)
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Abstract:
The Indian ornamental fish industry is divided into two-the domestic market and the export market. 90% of the freshwater ornamental fish exported from India are wild caught indigenous species. The study formed the criteria and indicators assessing the sustainability of wild caught ornamental fish exported from India. These indicators were then analyzed for their interactions, connections, linkages and relationships using cognitive mapping. The work is first of its kind in the ornamental fisheries
Annie Abraham,S; Meera Bai,M(Department of Applied Economics, 2003)
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Abstract:
The present study on the sustainability of medicinal plants in Kerala economic considerations in domestication and conservation of forest resources. There is worldwide consensus on the fact that medicinal plants are important not only in the local health support systems but in rural income and foreign exchange earnings. Sustainability of medicinal plants is important for the survival of forest dwellers, the forest ecosystem, conserving a heritage of human knowledge and overall development through linkages. More equitable sharing of the benefits from commercial utilization of the medicinal plants was found essential for the sustainability of the plants. Cultivation is very crucial for the sustainability of the sector. Through a direct tie-up with the industry, the societies can earn more income and repatriate better collection charges to its members. Cultivation should be carried out in wastelands, tiger reserves and in plantation forests. In short, the various players in the in the sector could find solution to their specific problems through co-operation and networking among them. They should rely on self-help rather than urging the government to take care of their needs. As far as the government is concerned, the forest department through checking over- exploitation of wild plants and the Agriculture Dept. through encouraging cultivation could contribute to the sustainable development of the medicinal plant sector.
Jayan, K N; Dr.Arunachalam, P(Cochin University of Science & Technology, 2004)
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Abstract:
The study has wider policy implications as it identifies the possible variables which
influence the sustainability of participatory productive sector projects. The method which is
developed to study the sustainability of projects under People’s Planning in Chempu
Panchayat could be used for studying the same in other panchayats also. Unlike the case of
the standard features of sustainability identified, the independent variables vary according to
the nature of the project. Hence, this needs to be modified accordingly while applying the
method in a dissimilar domain. Selection of a single panchayat for the present study is
relevant on the basis of a common package of inputs for decentralised planning which is
forwarded by the State Planning Board respectively for the three-tier panchayat system in
Kerala. The dynamic filed realities could be brought out in view of a comprehensive
planning approach through an in depth study of specific cases.The assessment of the nature and pattern of productive sector projects in the selected
Village Panchayat puts the projects under close scrutiny. The analysis has depended largely
on secondary sources of information, especially from panchayat level plan documents, and
also on the primary information obtained using direct observation and on-site inspection of
project sites. An analysis of the nature and pattem of productive sector projects is important
as it gives all necessary information regarding follow-up, monitoring/evaluation and even
termination of a particular project. It has also revealed the tendencies of including
infrastructure and service sector projects under ‘productive’ category, especially for
maintaining the stipulated ratio (40:30:30) of grant-in-aid distribution. The study regarding
the allocation and expenditure pattern of plan funds is vital in policy level as it reveals the
under-noticed allocation and expenditure pattern of plan funds other than grant-in-aid. One
major limitation of the study has been the limited availability of secondary data, especially regarding project-wise expenditure and monitoring/evaluation reports of various project
committees.
Description:
Department of Applied Economics, Cochin
University of Science and Technology.
Subha, Vishnudas; Dr.Abdul Azis, P K(Cochin University of Science And Technology, 2006)
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Abstract:
Soil erosion is more detrimental and affects the chemical, physical and biological
properties of the soil. Degradation of soil and water resources is a worldwide problem. Over the next two decades, it is expected that the world will need 17% more water to grow food for the increasing population in developing countries and that total water use will increase by 40%. The total land area subjected to human-induced soil degradation is estimated as 20 x 106 (km)2 Hence conservation of soil and water is essential for the subsistence of life. This can be made possible through sustainable watershed management. This thesis aims at investigating the condition under which sustainable watershed management is possible in Kerala, in South India. The research has been carried out in three stages. In the first stage a conceptual framework is formulated (Chapter 3) based on the relevant literature (Chapter 2) in the field of watershed management. In the second stage this framework is applied to two existing case studies in Kerala State (Chapter 4).
In the third stage, the methodology is used to test out geo textile innovation (Chapter 5) in two field experiments (Chapter 6).
Description:
Department of environmental studies, Cochin University of Science And Technology