Geo Baby; Dr. K. George Varghese(Cochin University of Science and Technology, December 22, 2016)
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Abstract:
There are various studies conducted on transformational leadership
and learning organization. The term gets more importance in current
scenario as the technological advancement and many other factors made
organization unsustainable without learning culture. The objective of this
study was to identify relationship between transformational leadership and
learning organizations. The study was conducted in 27 organizations
inside Kerala and the tools used for the study are Multifactor leadership
questionnaire (MLQ) 21 items by Bernad M Bass and B J Avolio and the
Dimensions of learning organizations questionnaire (DLOQ) 43 items by
Watkins and Marsick. The study has used confirmatory factor analysis, one
way ANOVA, Pearson correlation analysis and Canonical discriminant
function analysis for deriving the results. The result of this research proves
that, there is a significant relationship between transformational leadership
and learning organization. There is a significant positive impact of the factors
of Transformational leadership i.e. idealized influence, inspirational
motivation, intellectual stimulation, individual consideration, contingent
reward, management by exception and laissez faire leadership in
discriminating high, medium and low learning organization.
Qinghe, Mao; John, Lit W Y(Microwave and Optical Technology Letters, November 20, 2002)
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Abstract:
The transient characteristics of an erbium-doped fiber
(F.DF) laser, which can switch between wavelengths. are investigated.
77te laser has a set of coupled linear cavities. The slow gain dynamics
of EDFs and the cross-gain saturation in the coupled cavities give rise
to delayed switching responses and relocation oscillations, which are
respertively measured to be l ins and 3.5 ms for the worst rase, and
which mar be decreased by increasing the pump power. Thus, the
switching speed of the laser may be higher than 100 Hz
Shali, N B; Dr.Sugunan, S(Cochin University of Science and Technology, April , 2006)
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Abstract:
Catalysis is a mature field with extensive practical applications in today's society.indeed,the catalysis of petroleum refining,fine chemical synthesis and emission control demands the production of catalysts in bulk quantities.Future improvement of these well established processes is likely to be incremental.On the other hand,the continuous demand for new products will require additional novel and innovative processes.The need for pollution abatement and prevention also imposes new demands on catalysis, and new processes are periodically advanced for the control of emission of gases as well as for remediation processes such as the cleaning of underground waters. The number of problems where catalysis can have a big impact is constantly growing.In general,science stimulated by the technology has enriched the field of catalysis in a way that has had broad and lasting value.The thesis"Transition metal and rare earth metal modified sol-gel titania: a versatile catalyst for organic transformations" accounts the preparation and characterization studies of both transition metals and rare earth metals modified sol-gel titania and its applications in industrially useful organic reactions.
Description:
Department of Applied Chemistry,
Cochin University of Science and Technology
Renjusha, S; Dr.Prathapachandra Kurup,M R(Cochin University of Science and Technology, April , 2012)
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Abstract:
Thiosemicarbazones have recently attracted considerable attention due to
their ability to form tridentate chelates with transition metal ions through either
two nitrogen and sulfur atoms, N–N–S or oxygen, nitrogen and sulfur atoms,
O–N–S. Considerable interest in thiosemicarbazones and their transition metal
complexes has also grown in the areas of biology and chemistry due to
biological activities such as antitumoral, fungicidal, bactericidal, antiviral and
nonlinear optical properties. They have been used for metal analyses, for
device applications related to telecommunications, optical computing, storage
and information processing.The versatile applications of metal complexes of thiosemicarbazones in various fields prompted us to synthesize the tridentate NNS-donor
thiosemicarbazones and their metal complexes. As a part of our studies on
transition metal complexes with these ligands, the researcher undertook the current work
with the following objectives.
1. To synthesize and physico-chemically characterize the following
thiosemicarbazone ligands:
a. Di-2-pyridyl ketone-N(4)-methyl thiosemicarbazone (HDpyMeTsc)
b. Di-2-pyridyl ketone-N(4)-ethyl thiosemicarbazone (HDpyETsc)
2. To synthesize oxovanadium(IV), manganese(II), nickel(II), copper(II),
zinc(II) and cadmium(II) complexes using the synthesized
thiosemicarbazones as principal ligands and some anionic coligands.
3. To study the coordination modes of the ligands in metal complexes by
using different physicochemical methods like partial elemental analysis,
thermogravimetry and by different spectroscopic techniques.
4. To establish the structure of compounds by single crystal XRD studies
Description:
Department of Applied Chemistry, Cochin University of Science and Technology
Manju, Sebastian; Dr.Mohammed Yusuff,K K(Cochin University of Science & Technology, July , 2010)
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Abstract:
Schiff base complexes of transition metal ions have played a significant role in coordination chemistry.The convenient route of synthesis and thermal stability of Schiff base complexes have contributed significantly for their possible applications in catalysis,biology,medicine and photonics.Significant variations in cataltytic activity with structure and type are observed for these complexes.The thesis deals with synthsis and characterization of transition metal complexes of quinoxaline based Schiff base ligands and their catalytic activity study.The Schiff bases synthesized in the present study are quinoxaline-2-carboxalidine-2-amino-5-methylphenol,3-hydroxyquinoxaline-2-carboxalidine-2-amino-5-methylphenol,quinoxaline-2-aminothiophenol.They provide great structural diversity during complexation.To the best of our knowledge, the transition metal complexes of quinoxaline based Schiff bases are poorly utilised in academic and industrial research.
Description:
Dept.of Applied Chemistry,Cochin University of Science and Technology
Sreesha, Sasi; Dr.Prathapachandra Kurup,M R(Cochin University of Science & Technology, October , 2008)
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Abstract:
Metallo-organic chemistry,incorporating the frontiers of both inorganic and organic chemical aspects,is a topic of utility concern.The first exploration of coordinated metal complexes dates back to the ninettenth century,during the days of Alfred Werner.Thereafter,inorganic chemistry witnessed a great outflow of coordination compounds,with unique structural characteristics and diverse applicatons.The diversity in structures exhibited by the coordination complexes of multidentate ligands have led to their usage as sensors,models for enzyme mimetic centers,medicines etc.The liganda chosen are of prime importance in determining the properties of coordination compounds.Schiff bases are compounds obtained by the condensation of an aidehyde or ketone with an amine.The chemical properties of Schiff bases and their complexes are widely explored in recent years owing to their pharmacological activity,their catalytic activities and so on.On the other hand pseudohalides like azide and thiocyanate are versatile candidates for the construction of dimeric or polymeric complexes having excellent properties and diverse applications.So a combination of the Schiff bases and the pseudohalogens for the synthesis of metal complexes can bring about interesting results.An attempt into this area is the besis of this Ph.D theis.
Description:
Department of Applied Chemistry,
Cochln University of Science and Technology
Suja, Krishnan; Dr.Prathapachandra Kurup,M R(Cochin University of Science and Technology, June , 2008)
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Abstract:
Coordination chemistry of pentadentate 2,6-diacetylpyridine
bis(thiosemicarbazone) Schiff base ligands has been intensively studied due to the versatility of the molecular chain in order to obtain very different
geometries as well as their broad therapeutic activity. Metal complexes of
thiosemicarbazone with aldehydes and ketones have been widely reported.
But there have been fewer reports on potential pentadentate
bis(thiosemicarbazones) formed from 2,6-diacetylpyridine. Keeping these in
view, we have synthesized four bis(thiosemicarbazone) systems with
2,6-diacetylpyridine. In the present work, the chelating behavior of
bis(thiosemicarbazones) are studied, with the aim of investigating the
influence of coordination exerts on their conformation and or configuration, in
connection with the nature of the metal and of the counter ion. The selection
of the 2,6-diacetylpyridine as the ketonic part was based on its capability to
form polynuclear complexes with different coordination number. The doubled
armed bis(thiosemicarbazones) can coordinate to a metal centre as dianionic
ligand by losing its amide protons or it can coordinate as monoanionic ligand
by losing its amide proton from one of the thiosemicarbazone moiety or it can
also be coordinate as neutral ligand. Hence it is interesting to explore the
coordinating capabilities of these ligands whether in neutral form or anionic
form and to study the structural variations occurring in the ligands during
complexation such as change in conformation.
Description:
Department of Applied Chemistry,
Cochin university of Science and Technology
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.