Sugunan, S; Sherly, K B(Indian Journal of Chemistry, October , 1994)
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Abstract:
Lanthanum oxide, La2O3 has been found to be an effective
catalyst for the liquid phase reduction of cyclohexanone.
The catalytic activities of La2O3 activated
at 300, 500 and 800·C and its mixed oxides with
alumina for the reduction of cyclohexanone with
2-propanol have been determined and the data parallel
that of the electron donating properties of the catalysts.
The electron donating properties of the catalysts have
been determined from the adsorption of electron acceptors
of different electron affinities on the surface of
these oxides.
The catalytic activity of some of the ABO3 (A = La, Pr
and Sm, B= Cr, Mn, Fe, Co and Ni) perovskite-type oxides
for the liquid phase reduction of ketone and oxidation of
alcohol in 2-propanol medium has been studied. The data
have been correlated with the surface electron donor
properties of these oxides. The surface electron donor
properties have been determined from the adsorption of
electron acceptors of varying electron affinities on the
oxide surface.
Spinel systems with the composition of Cu 1−x Zn x Cr 2 O 4 [x = 0 CCr, x = 0.25 CZCr-1, x = 0.5 CZCr-2, x = 0.75 CZCr-3 and x = 1 ZCr] were prepared by homogeneous co-precipitation method and were characterized by X-ray diffraction (XRD) and FT-IR spectroscopy. Elemental analysis was done by EDX, and surface area measurements by the BET method. The redox behavior of these catalysts in cyclohexane oxidation at 243 K using TBHP as oxidant was examined. Cyclohexanone was the major product over all catalysts with some cyclohexanol. 69.2% selectivity to cyclohexanol and cyclohexanone at 23% conversion of cyclohexane was realized over zinc chromite spinels in 10 h.
Poulose Jacob,K; Vimina, E R(International Journal of Advanced Science and Technology, November , 2012)
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Abstract:
This paper proposes a content based image retrieval (CBIR) system using the local colour and texture features of selected image sub-blocks and global colour and shape features of the image. The image sub-blocks are roughly identified by segmenting the image into partitions of different configuration, finding the edge density in each partition using edge thresholding, morphological dilation and finding the corner density in each partition. The colour and texture features of the identified regions are computed from the histograms of the quantized HSV colour space and Gray Level Co- occurrence Matrix (GLCM) respectively. A combined colour and texture feature vector is computed for each region. The shape features are computed from the Edge Histogram Descriptor (EHD). Euclidean distance measure is used for computing the distance between the features of the query and target image. Experimental results show that the proposed method provides better retrieving result than retrieval using some of the existing methods
Description:
International Journal of Advanced Science and Technology
Vol. 48, November, 2012
Nisha, P C; Dr. George, K C(Central Marine Fisheries Research Institute, October , 2006)
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Abstract:
The present investigation revealed three types of circulating haemocytes
in the haemolymph of F. indicus: hyalinocytes, small-granule haemocytes, and
large-granule haemocytes. Intermediate stages indicate the maturing process of a
single cell. The presence of enzymes such as peroxidase, phenoloxidase and acid
phosphatase in the haemocytes, and the substantial production of oxygen radicals
during phagocytosis show that the haemocytes are capable of mounting a fme
cellular defense mechanism. The enzyme activities of the serum and the presence
of agglutinins in the serum, which may act as opsonins, agglutinate foreign
particles and augment phagocytosis, confirm the presence of a superior humoral
immune system in F. indicus.Bacterial infection caused considerable variations in the cellular and
humoral factors, such as the number of circulating cells and haemagglutinating
activity, especially in the initial hours of infection. The total haemocyte count,
haemagglutination titer and phenoloxidase enzyme showed significant reductions
on bacterial presence and could be used as indicators of bacterial infection.The number of circulating cells showed drastic fluctuation on exposure to
pollutants. Nuvan at low concentrations was able to produce changes in the
haemolymph factors and in the tissue organization, which implies that the animal
is under stress and is easily prone to infections. Exposure to nuvan resulted in
significant variation in all of the cellular and humoral factors, especially, the total
haemocyte count, percentage of small granule haemocytes, phagocytic activity
and the haemagglutinating activity, which might be good indicators of pesticide
pollution. Heavy metal exposure caused significant increase in total haemocyte
count and reduction in phenoloxidase enzyme activity Even changes in the
physio-chemical parameters, such as salinity caused fluctuations in the defense
factors, indicating stress in this euryhaline species. The dietary incorporation of a
commercial immunostimulant containing P-l,3 glucan resulted in stimulation of
some of the humoral defense factors of F indicus, but was time dependent. The
modulations, on exposure to various external factors, in the cellular and humoral
factors, especially, total haemocyte count, phagocytic activity, haemagglutinating
activity and the phenoloxidase and acid phosphatase enzymes suggest that these
parameters could be used as indicators of the health status of F indicus, which
assist in better monitoring and effective health management of this important
cultured species.
George,K K; Dr.Parameswaran, Nair N(Cochin University of Science and Technology, October 19, 1982)
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Abstract:
The problem of regional disparities in economic
development is for India an inheritance from the colonial past.
At the beginning of the First Five Year Plan (1950-51), three
years after the advent of independence, the per capita State
income showed considerable inter—state variations.
Description:
School of Management Studies, Cochin University of Science and Technology
Jagathy Raj, V P; Ajims, Muhammed P(Indian Institute of Management Kozhikode, May 17, 2008)
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Abstract:
Tourism being a smokeless industry is now a multi-billion, multi-sectoral and multi-dimensional activity in
the world. Twenty first century tourism has reached up to space when a Russian rocket carried the space
vehicle of Dennis Tito, an American businessman and the world’s first space tourist, to the space station.
Time is not too far to carry tourists to moon and other planets in specially launched vehicles.
Tourism is being considered as an agent of social change bridging gaps among nations, regions and people
and helping them to open up. It is a promoter of development-material and spiritual both at macro and
micro level. The General Assembly of the United Nations, in designating the year 1967 as ‘International
Tourism Year’ recognized the importance of international travel as a means of fostering understanding
among people, and giving them a knowledge of the rich heritage of the past civilizations, a better
appreciation of the values of different cultures, thus contributing to the strengthening of world peace. It
adopted the theme “Tourism-Passport to peace”. Our veteran national leader and the first Prime Minister
of India, Jawaharlal Nehru had said” welcome a tourist and send back a friend” which indicates the need
for extending friendly hospitality to the in bound tourists.
Modern transportation has removed the obstacles of distance enabling people to appreciate each other
engage in the exchange of ideas and commerce. Tourism can help overcome real prejudices and foster
bonds. Tourism can be a real force of world peace.
Considering the vast and varied potential of tourism in the state and its impact on the economic, social and
cultural environment of the state, a detailed study is found to be relevant and imperative
Description:
Conference on Tourism in India – Challenges Ahead, 15-17 May 2008, IIMK
Ramachandran, A; Sankar, T V(Society of Fisheries Technologists (India), 2001)
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Abstract:
Total biochemical composition of freshwater major carps, Labeo rohita -(r9hu); Catla catla
(catla); Cirrltinus tnrigala (mrigal), in relation to size was evaluated . The water soluble
nitrogen fraction constituted about 21% of the tota l nitro gen . Salt so luble fraction
constituted 55 - 60% of the total nitrogen. Non-protein nitrogen represented 12% of the
total nit rogen in all the cases except mri gal of small size (9.36%). The insoluble connec tive
tissu e contributed to 2-3 per cent of tota l nitrogen . The monounsaturated fatty acid s (MUFA)
formed 31-39% of the total fatty acids and 60-68% of the MUFA in freshwat er carps was
CI 8:1. The esse ntial amino acids contributed to 41 to 51% of the total amino acid s in
freshwater major carps. Arom atic amino acid content was sligh tly higher compared to
marine fishe s while the proportion of proline was less. Varia tions in compos ition in rela tion
to size are discu ssed . The autolytic activi ty was significantly higher in small fish in all
the three species
The changes occuring to cashew
kernels during storage at two humidity
levels - 80% to 20% with respect
to organoleptic characteristics,
protein content, carbohydrate content,
oil content, iodine and peroxide
values were studied. From the
present study it is concluded that
organoleptic characteristics of
cashew kernels deteriorates with increase
in humidity. Decrease in protein
and carbohydrate content of
stored cashew kernel is dependent
on humidity. Humidity increased
oxidative rancidification.
The development of computer and network technology is changing the education scenario and transforming the teaching and learning process from the traditional physical environment to the digital environment. It is now possible to access vast amount of information online and enable one to one communication without the confines of place or time. While E-learning and teaching is unlikely to replace face-to-face training and education it is becoming an additional delivery method, providing new learning opportunities to many users. It is also causing an impact on library services as the increased use of ICT and web based learning technologies have paved the way for providing new ICT based services and resources to the users. Online learning has a crucial role in user education, information literacy programmes and in training the library professionals. It can help students become active learners, and libraries will have to play a greater role in this process of transformation. The significance of libraries within an institution has improved due to the fact that academic libraries and information services are now responsible for e-learning within their organization.
Description:
KLA Seminar on library and webtools for E-Learning and teaching,25 june 2012,Kerala Agricultural University
In Wireless Sensor Networks (WSN), neglecting the
effects of varying channel quality can lead to an
unnecessary wastage of precious battery resources and in
turn can result in the rapid depletion of sensor energy and
the partitioning of the network. Fairness is a critical issue
when accessing a shared wireless channel and fair
scheduling must be employed to provide the proper flow
of information in a WSN. In this paper, we develop a
channel adaptive MAC protocol with a traffic-aware
dynamic power management algorithm for efficient packet
scheduling and queuing in a sensor network, with time
varying characteristics of the wireless channel also taken
into consideration. The proposed protocol calculates a
combined weight value based on the channel state and link
quality. Then transmission is allowed only for those nodes
with weights greater than a minimum quality threshold
and nodes attempting to access the wireless medium with a
low weight will be allowed to transmit only when their
weight becomes high. This results in many poor quality
nodes being deprived of transmission for a considerable
amount of time. To avoid the buffer overflow and to
achieve fairness for the poor quality nodes, we design a
Load prediction algorithm. We also design a traffic aware
dynamic power management scheme to minimize the
energy consumption by continuously turning off the radio
interface of all the unnecessary nodes that are not included
in the routing path. By Simulation results, we show that
our proposed protocol achieves a higher throughput and
fairness besides reducing the delay
Description:
IJCSNS International Journal of Computer Science and Network Security, VOL.10 No.7, July 2010
This paper is a review of the work done on the dynamics of modulated logistic systems.
Three different problems are treated, viz, the modulated logistic map, the parametrically perturbed
logistic map and the combination map obtained by combining two maps of the quadratic family.
Many of the interesting features displayed by these systems are discussed.