Maheswaran, Sithambaresan; Dr.Prathapachandra Kurup,M R(Cochin University of Science and Technology, April , 2012)
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Abstract:
The unusual coordination modes of semicarbazones when bound to
metals, the wide applications and structural diversity of metal complexes of
semicarbazones provoked us to synthesize and characterize the tridentate ONO
and NNO-donor semicarbazones and their transition metal complexes. This
work is focused on the studies on complexes of three N4-phenylsemicarbazones
synthesized by changing the carbonyl compounds. This work is concerned with the studies of two new semicarbazones, 2- formylpyridine-N4-phenylsemicarbazone (HL1) and 3-ethoxysalicylaldehyde- N4-phenylsemicarbazone (H2L2) and a reported semicarbazone
2-benzoylpyridine-N4-phenylsemicarbazone (HL3) [29]. The compositions of
these semicarbazones were determined by the CHN analyses and IR, UV and
NMR spectral studies were used for the characterization of these compounds.
The molecular structure of 3-ethoxysalicylaldehyde-N4-phenylsemicarbazone
(H2L2) was obtained by single crystal X-ray diffraction studies. Also, we have
synthesized Cu(II), Cd(II), Zn(II) and Ni(II) complexes of these three
semicarbazones. The complexes were characterized by various spectroscopic
techniques, magnetic and conductivity studies. We could isolate single crystals
of some complexes of all metals suitable for X-ray diffraction studies. This
thesis is divided into six chapters.
Description:
Department of Applied Chemistry, Cochin University of Science and Technology
Maheswaran Sithambaresan; Dr. M. R. Prathapachandra Kurup(Cochin University of Science and Technology, April 18, 2012)
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Abstract:
The work embodied in this thesis was carried out by the author in the
Department of Applied Chemistry, CUSAT, Kochi, during the period 2009-2012.
The thesis is an introduction to our attempts to evaluate the coordination behavior
of some compounds of our interest. The biological activities of semicarbazones
and their metal complexes have been an active area of research during the past
years because of their significant role in naturally occurring biological systems.
Tridentate NNO and ONO semicarbazone systems formed from heterocyclic and
aromatic carbonyl compounds and their transition metal complexes are wellauthenticated
compounds in this field and their synthesis, crystal structures and
spectral studies are well desirable. Hence, we decided to develop a research
program aimed at the syntheses, crystal structures and spectral studies of new N4-
phenylsemicarbazones derived from 2-formylpyridine and 3-ethoxysalicylaldehyde
and their transition metal complexes and new transition metal complexes of 2-
benzoylpyridine-N4-phenylsemicarbazone. In addition to various physicochemical
methods of analysis, single crystal X-ray diffraction studies were also
used for the characterization of the complexes.
Laly, K; Dr.Prathapachandra Kurup,M R(Cochin University of Science and Technology, July , 2011)
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Abstract:
In the present work,the chelating behaviour of thiosemicarbazones of a heterocyclic diketone, 2,6-diacetylpyridine is studied,with the aim of investigating the influence coordination exerts on their conformation and /or configuration, in connection with the nature of the metal and of the counter ion.The various possibilities like unsubstitution,ring incorporation at terminal nitrogen and condensation of one of the ketone group alone have been tried for ligand selection.Mainly first row transition metals like manganese,iron,nickel,copper,zinc and cadmium are studied.Metals like cobalt also were studied but could not result in fruitful isolation of the compound due to solubility problems.Different spectroscopic and characterization techniques have been utilized to reveal the nature of the metal and the ligands in coordinated metal complex.
Description:
Department of Applied Chemistry,Cochin University of Science and Technology
Bhoodes, R.K.; Dr. Francis C.A.(Cochin University of Science and Technology, November , 2014)
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Abstract:
Cashew is an important commodity traded across the continents and the
world cashew industry is the livelihood of more than three million people
worldwide, the majority of whom are womenfolk from the socially and
economically backward community of the developing nations. Cashew tree
was originally planted to prevent soil erosion and it was during the beginning
of the 19th century that cashew kernels attained the status of a food item.
Further, the cashew kernels attained the status of an international commodity
with India exporting its first consignment of cashew kernels to U.S.A. in 1920.
India was the first country to hit the world market with cashew as a
commodity and it was she who pioneered cashew processing as an industry.
For decades together India was enjoying a monopoly in the world cashew
industry in the fields of raw nut production (cultivation), processing and the
market share in the international trade. The liberalisation of international trade
has brought in a big transition in the world of cashew. India started to benefit
from the trade policy, that improved her supply positions of raw nuts from
other producing countries, accelerated her growth in processing of raw nuts
and exports of cashew kernels. On the other side, her domestic consumption
started growing up that by the beginning of the new century, she emerged out
as the world’s largest consumer of cashew kernels as well.
Transparent diode heterojunction on ITO coated glass substrates was fabricated using p-type AgCoO2 and n-type ZnO films by pulsed laser
deposition (PLD). The PLD of AgCoO2 thin films was carried out using the pelletized sintered target of AgCoO2 powder, which was synthesized
in-house by the hydrothermal process. The band gap of these thin films was found to be ~3.89 eV and they had transmission of~55% in the
visible spectral region. Although Hall measurements could only indicate mixed carrier type conduction but thermoelectric power measurements of
Seebeck coefficient confirmed the p-type conductivity of the grown AgCoO2 films. The PLD grown ZnO films showed a band gap of ~3.28 eV,
an average optical transmission of ~85% and n-type carrier density of~4.6×1019 cm− 3. The junction between p-AgCoO2 and n-ZnO was found
to be rectifying. The ratio of forward current to the reverse current was about 7 at 1.5 V. The diode ideality factor was much greater than 2.
Philip,M P; George,K K(Department of Applied Economics, 2006)
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Abstract:
The study documents the long-term trends in financial intermediation by the principal player in Kerala’s credit system i.e., banking. The process of financial intermediation by the banking system, involving mobilization of deposits from savers and disbursal of credit to investors, is considered to be crucial in the process of economic development. The objective of the study is to explore the interrelationship between financial intermediation and economic growth in Kerala. In order to pursue this objective, the study examine, the trends in intermediation by the banking system in Kerala over a long period, the trend and pattern of bank deposits and credit in the State and Kerala’s economic growth, the trend in the growth and performance of financial intermediaries like the All India Financial Institutions, the links between banking and economic variables, and the difference in the growth trends of banking and economic variables between Kerala and India and the probable reasons for the difference
Rani, Joseph(Huthig & Wepf Verlag, Basel, April 29, 1986)
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Abstract:
Tribasic lead sulphate is tried as a practical curing agent for polychloroprene. The
cure characteristics of the compounds as well as the technical properties of the
vulcanizates show that it can act as a potential curative.
Mini, Kuriakose; Dr.Prathapachandra Kurup,M R(Cochin University of Science & Technology, December , 2006)
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Abstract:
The present work deals with the complexation of Schiff
bases of aroylhydrazides with various transition metal ions. The hydrazone
systems selected for study are capable of forming bridged polymeric structures
which is one of the fascinating subjects in the crystal engineering of coordination
polymers owing to their attractive new topologies and intriguing structural
features. Complexation with metal ions like copper, manganese, vanadium,
nickel, palladium, zinc and cadmium are tried. Various spectral techniques are
employed for characterization. The structures of some complexes have been well
established by single crystal X-ray diffraction studies.The work is presented in seven chapters and the last section deals with
summary and conclusion. The studies reveal that the aroylhydrazone systems vary
in their geometrical configuration depending on the substituents. The coordination
modes of the ligands also differ upon chelating with metal ions. One of the
hydrazone system selected for study proved that it could give rise to polymeric
metal complexes.
Description:
Dept.of Applied Chemistry,Cochin University of Science and Technology
Mythili, P; Jose, B R; Mathew, J; Pradhan, D K(IEEE, September 26, 2007)
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Abstract:
This paper presents a cascaded 2-2-2
reconfigurable sigma-delta modulator that can handle
GSM, WCDMA and WLAN standards. The modulator
makes use of a low-distortion swing suppression topology
which is highly suitable for wide band applications. In
GSM mode, only the first stage (2nd order Σ-Δ ADC) is
turned on to achieve 88dB dynamic range with oversampling
ratio of 160 for a bandwidth of 200KHz; in
WCDMA mode a 2-2 cascaded structure (4th order) is
turned on with 1-bit in the first stage and 2-bit in the
second stage to achieve 74 dB dynamic range with oversampling
ratio of 16 for a bandwidth of 2MHz and a 2-2-2
cascaded MASH architecture with a 4-bit in the last stage
to achieve a dynamic range of 58dB for a bandwidth of
20MHz. The novelty lies in the fact that unused blocks of
second and third stages can be switched off taking into
considerations like power consumption. The modulator is
designed in TSMC 0.18um CMOS technology and operates
at 1.8 supply voltage.
Mythili, P; Jawar, Singh; Babita, Jose R; Jimson, Mathew(IEEE, December 17, 2007)
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Abstract:
This work presents a triple-mode sigma-delta modulator
for three wireless standards namely GSM/WCDMA and
Bluetooth. A reconfigurable ADC has been used to meet
the wide bandwidth and high dynamic range requirements
of the multi-standard receivers with less power
consumption. A highly linear sigma-delta ADC which has
reduced sensitivity to circuit imperfections has been
chosen in our design. This is particularly suitable for wide
band applications where the oversampling ratio is low.
Simulation results indicate that the modulator achieves a
peak SNDR of 84/68/68 dB over a bandwidth of
0.2/3.84/1.5 MHz with an oversampling ratio 128/8/8 in
GSM/WCDMA/Bluetooth modes respectively
Description:
10th International Conference on Information Technology
This paper deals with brief overview of the developments of international provisions on IPR related to public health. It
discusses flexibilities before and after TRIPS Agreement and difficulties faced by developing countries in implementing
TRIPS obligations and protecting public health. Also discussed are the reasons for the Doha Declaration and issues relating
to implementation of Para 6 of the Declaration. Discusses the inadequacy in the compulsory licence based approach to solve
public health crisis and argues for a more comprehensive approach to find a long term solution to the public health issues
Description:
Journal of Intellectual Property Rights
Vol 13, September 2008, pp 395-400
Ratheesh Kumar, C S; Dr.Chandramohanakumar, N(Cochin University of Science and Technology, August , 2011)
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Abstract:
This thesis entitled triterpenoids as biomarkers of mangrove organic matter in cochin estuarine system.Mangrove forests, known as rainforests of the sea are one of the most important coastal ecosystems in the world in terms of primary production and coastal protection.Estuaries, the important areas of world’s coastal zones link the carbon cycle of the oceans to the continents.Three mangrove
ecosystems and three estuarine stations around Cochin region, southwest coast of India were selected for the present study. The thesis is divided into five chapters. Chapter 1 is the Introduction and it deals with the aim and scope of the present study. Chapter 2 is Materials and Methods. This chapter deals with the nature and general geographical features of the study area. It also contains the details of the sampling and analytical methodology.the present study. Chapter 3 is Geochemistry and it includes the seasonal and spatial variations of the geochemical parameters in the surface sediments.Chapter 4 is Biochemical Composition. It covers the biochemical composition of organic matter in the surface sediments to examine the quality and quantity of organic matter.Chapter 5, Triterpenoid Biomarkers in Sediments, characterize the organic matter in the sediments of the mangrove and estuarine ecosystems under study, to assess the possible sources with the help of triterpenoid biomarkers along with other lipid biomarkers.
Description:
Department of Chemical Oceanography, School of Marine Sciences, Cochin University of Science and Technology
Abhilash, S; Dr.Mohan Kumar, K(Cochin University of Science and Technology., December , 2007)
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Abstract:
The main purpose of the thesis is to improve the state of knowledge and understanding
of the physical structure of the TMCS and its short range prediction. The present
study principally addresses the fine structure, dynamics and microphysics of severe convective
storms.The structure and dynamics of the Tropical cloud clusters over Indian region is not well
understood. The observational cases discussed in the thesis are limited to the temperature
and humidity observations. We propose a mesoscale observational network along with all
the available Doppler radars and other conventional and non—conventional observations.
Simultaneous observations with DWR, VHF and UHF radars of the same cloud system will
provide new insight into the dynamics and microphysics of the clouds. More cases have to
be studied in detail to obtain climatology of the storm type passing over tropical Indian
region. These observational data sets provide wide variety of information to be assimilated
to the mesoscale data assimilation system and can be used to force CSRM.The gravity wave generation and stratosphere troposphere exchange (STE) processes
associated with convection gained a great deal of attention to modem science and meteorologist.
Round the clock observations using VHF and UHF radars along with supplementary
data sets like DWR, satellite, GPS/Radiosondes, meteorological rockets and aircrafl
observations is needed to explore the role of convection and associated energetics in detail.
Description:
Department of Atmospheric Sciences,
Cochin University of Science and Technology
Bright Singh, I S; Kulkarni, A; Rombout, J H W M; Sudheer, N S; Vlak, J M; Caipang, C M A; Kiron, V; Brinchmann, M F(Elsevier, October 26, 2012)
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Abstract:
Several oral vaccination studies have been undertaken to evoke a better protection against white spot
syndrome virus (WSSV), amajor shrimp pathogen. Formalin-inactivated virus andWSSV envelope protein
VP28 were suggested as candidate vaccine components, but their uptake mechanism upon oral delivery
was not elucidated. In this study the fate of these components and of live WSSV, orally intubated to black
tiger shrimp (Penaeus monodon) was investigated by immunohistochemistry, employing antibodies
specific for VP28 and haemocytes. The midgut has been identified as the most prominent site of WSSV
uptake and processing. The truncated recombinant VP28 (rec-VP28), formalin-inactivated virus (IVP) and
live WSSV follow an identical uptake route suggested as receptor-mediated endocytosis that starts with
adherence of luminal antigens at the apical layers of gut epithelium. Processing of internalized antigens is
performed in endo-lysosomal compartments leading to formation of supra-nuclear vacuoles. However, the
majority of WSSV-antigens escape these compartments and are transported to the inter-cellular space via
transcytosis. Accumulation of the transcytosed antigens in the connective tissue initiates aggregation and
degranulation of haemocytes. Finally the antigens exiting the midgut seem to reach the haemolymph. The
nearly identical uptake pattern of the different WSSV-antigens suggests that receptors on the apical
membrane of shrimp enterocytes recognize rec-VP28 efficiently. Hence the truncated VP28 can be
considered suitable for oral vaccination, when the digestion in the foregut can be bypassed