Mary Matha Arts and Science College

Mananthavady, India

Mary Matha Arts and Science College

Mananthavady, India
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Padmanabhan L.N.,Mary Matha Arts and Science College | Raghavan S.D.A.,Mary Matha Arts and Science College | Kenchappa C.S.B.,National Institute of Mental Health and Neuro Sciences
Turkish Journal of Fisheries and Aquatic Sciences | Year: 2017

The light and ultrastructural observations on haemocyte profile of the freshwater crab Travancoriana schirnerae demonstrated three cell types: agranulocyte, granulocyte I and granulocyte II. Agranulocytes are the smallest of the haemocyte types, comprised 38% of the haemocytes, devoid of granules and showed high nucleoprotoplasmic ratio. Their cytoplasm contained numerous free ribosomes, vesicles of smooth endoplasmic reticulum, few mitochondria with parallel cristae and vacuoles. Granulocytes I (37%) are the largest of the haemocyte types, characterized by the presence of numerous granules (26 to 61) of varying size, shape and densities and organelles like mitochondria, free ribosomes and peripheral vacuoles and displayed low nucleoprotoplasmic ratio. Granulocytes II (25%) contained large electron dense granules (10 to 23) and organelles like free ribosomes and vacuoles and showed intermediate nucleoprotoplasmic ratio. Unlike granulocytes, agranulocytes exhibited prominent pseudopodial projections suggesting a phagocytory function. This study revealed the unusual occurrence of a binucleate agranulocyte and a rare phenomenon called clasmatosis of granulocyte II, wherein part of the cell fragments off along with cytoplasmic contents devoid of nucleus. © Published by Central Fisheries Research Institute (CFRI) Trabzon, Turkey.

Aarif K.M.,Mary Matha Arts and Science College | Muzaffar S.B.,United Arab Emirates University | Babu S.,Salim Ali Center for Ornithology and Natural History | Prasadan P.K.,Mary Matha Arts and Science College
Biodiversity and Conservation | Year: 2014

Shorebirds are globally experiencing declines due to habitat loss and anthropogenic disturbance. The Central Asian Flyway hosts significant shorebirds that winter in the Indian subcontinent. The current study examined the shorebird assemblages of Kadalundi-Vallikkunnu Community Reserve, an internationally important estuarine wetland in southwestern India, to determine changes in their assemblages in relation to habitat alterations. We conducted point counts from 2005 to 2012 in mudflats, mangroves, sandy beaches and shallow water areas in Kadalundi-Vallikkunnu Community Reserve. This study measured physicochemical variables as a proxy for anthropogenic change experienced as a result of rapidly increasing human populations combined with development. We examined rainfall data during the study period to determine associations with shorebird abundance. Stepwise linear regression showed that total nitrogen and rainfall were significantly related to shorebird abundance (bird count = 306 + 213 NO3--1.13 rainfall, F = 31.20, p < 0.001). High rainfall in a given year (one-way ANOVA F = 19.91, p < 0.001) and the previous year resulted in lower shorebird counts (one-way ANOVA F = 16.01, p < 0.001). Shorebirds declined during the study period and habitat use shifted significantly from mangroves and mudflats to sandy beaches (one-way ANOVA, F = 2.18, p = 0.034). Shorebirds also exhibited a gradual decline in diversity. We conclude that altered nutrient content in this wetland resulted in changes in the prey base in the four habitat types. Shorebirds responded to these changes by increasing the use of less preferred habitat (sandy beaches). The anthropogenic influences on the wetland are large (waste disposal, sand mining, disturbance due to development) and continued pressure may result in further decline of shorebird assemblages. The results from this study indicate that certain anthropogenic disturbances, such as waste disposal and sand mining, should be reduced to maintain and improve the integrity of this wetland. © 2014 Springer Science+Business Media Dordrecht.

Aarif K.M.,Mary Matha Arts and Science College | Prasadan P.K.,Mary Matha Arts and Science College | Basheer P.M.,Palishakkottu Purayil | Abdul Hameed S.V.,Farook College
Journal of Environmental Biology | Year: 2015

Data on population trend of birds in stop-over sites is a prerequisite for managers to implement/execute species/ecosystem-oriented conservation programme. However, such data for wetland birds and their associated ecosystems is meagre/unavailable in India. At this juncture, population trend of gulls in Kadalundi-Vallikkunnu Community Reserve (KVCR) was evaluated on the basis of primary and secondary data collected between 1989 and 2009. Data of 1,26,103 birds belonging to five species were recorded during the study. During 2005-2009, Black-headed Gull and Brown-headed Gull were dominant species, while Pallas's Gull and Slender-billed Gull were lesser in number. In response to data on observation made during 1989, population of scavenging gulls viz., Black-headed Gull and Brown-headed Gull was increased to 165 and 135% respectively, while the population of specialist gulls such as Pallas's Gull and Slender-billed Gull found to be stable or on decline. Increasing trend of scavenging gulls and declining pattern of specialist gulls could be attributed to the consequences of habitat loss and other anthropogenic pressure (over-fishing, mining, pro-human developmental activities and dumping of poultry wastes) in KVCR. Site-specific conservation measures need to be undertaken across the stop-over sites in the West and East Coast of India to conserve this vital habitat in the Central Asian Flyway. © Triveni Enterprises, Lucknow (India).

Monoth T.,Mary Matha Arts and Science College | P B.A.,Kannur University
Proceedings - 2010 International Conference on Cyberworlds, CW 2010 | Year: 2010

Visual cryptography is a kind of secret image sharing scheme that uses the human visual system to perform the decryption computations. A visual cryptography scheme allows confidential messages to be encrypted into k-out-of-n secret sharing schemes. Whenever the number of participants from the group (n) is larger than or equal to the predetermined threshold value (k), the confidential message can be obtained by these participants. Contrast is one of the most important parameters in visual cryptography schemes. Usually, the reconstructed secret image will be darker (through contrast degradation) than the original secret image. The proposed scheme achieves better contrast and reduces the noise in the reconstructed secret image without any computational complexity. In this method, additional pixel patterns are used to improve the contrast of the reconstructed secret image. By using additional pixel patterns for the white pixels, the contrast of the reconstructed secret image can be improved than in the case of existing visual cryptography schemes. © 2010 IEEE.

Monoth T.,Mary Matha Arts and Science College | Babu Anto P.,Kannur University
Advances in Intelligent Systems and Computing | Year: 2016

The existing pixel patterns for the visual cryptography scheme are based on the Perfect Reconstruction of Black Pixels (PRBP). Mathematically in PRBP the white pixels are represented by 0 and the black pixel by 1. In the usual binary image, the number of white pixels is much larger than the number of black pixels. Therefore, the perfect reconstructions of black pixels in visual cryptography schemes can decrease the contrast. Here, a visual cryptography scheme which is focused on the Perfect Reconstruction of White Pixels (PRWP) and hence can provide better clarity is presented. As in the case of all existing binary image file formats, PRWP represents white pixel by 1 and black pixel by 0. The visual cryptography scheme with PRWP can improve the clarity of reconstructed images. But by analysing the experimental results, we know that the number of black pixels in the reconstructed image is very less compared to the original image. Therefore increasing the black pixels in the reconstructed image can improve the contrast. In order to increase the black pixels use Additional Basis Matrix (ABM) to represent the new pixel pattern. © Springer Science+Business Media Singapore 2016.

Joseph M.M.,Mary Matha arts and Science College | Joseph P.T.,Kannur University
Biochemical and Cellular Archives | Year: 2011

The effect of aerobic exercises, that is brisk walking on health related physical fitness level in the type 2 diabetic patients were analysed in this study. Critical review of experimental results reveals a significant improvement in the health related physical fitness levels in type 2 diabetes patients. Activities showed significant difference in health related physical fitness between controls group and experimental groups in type 2 diabetes patients. The study demonstrates the positive benefits of exercise on diabetes patients and may help patients, healthcare personnel and health experts to chalk out effective aerobic programmes for the control and management of diabetes. The finding and insights of the study may be directly translated into practical health management programs, especially in the management of diabetes and related illnesses.

Thomas A.K.,Smart Materials Analytical Research and Technology SMART Laboratory | Abraham K.,Smart Materials Analytical Research and Technology SMART Laboratory | Thomas J.,Kuriakose Elias College | Saban K.V.,Mary Matha Arts and Science College
Ceramics International | Year: 2015

Abstract The effect of doping the A site (Ca) with La and B site (Ti) with Nb, on the grain formation, crystallographic structure, electrical properties and dielectric behaviour of CaCu3Ti4O12 is investigated over wide ranges of temperature (27-150°C) and frequency (50 Hz to 5 MHz). Microstructure investigation of the cast compound, Ca(1-3x)La2xCu3Ti(4-5x)Nb4xO12 (x=0, 0.02 and 0.04), using Scanning Electron Microscopy (SEM) showed that co-doping would result in grain growth inhibition. Rietveld refinement of the powder diffraction data confirmed a cubic, single phase structure with space group Im3. The steady increase in the lattice volume with increasing dopant concentration confirms the incorporation of the bigger dopant molecules in the lattice. Dielectric studies using HIOKI 3552-50 LCR Hi-Tester show that the room temperature dielectric constant would considerably increase due to co-doping. Impedance spectroscopic studies reveal that the compound is electrically heterogeneous, with semi conductive grain interior and insulating grain boundaries. Doping resulted in a decrease in grain boundary resistance and consequent increase in dielectric loss at low frequency. The dielectric behaviour of compound is explained on the basis of the Internal Barrier Layer Capacitance (IBLC) model. © 2015 Elsevier Ltd and Techna Group S.r.l.

Devi A.R.S.,Mary Matha Arts and Science College | Smija M.K.,Mary Matha Arts and Science College
Central European Journal of Biology | Year: 2014

This study investigated the seasonal variation in the structure and secretory activity of the androgenic gland (AG) in the freshwater crab: Travancoriana schirnerae. The androgenic gland is an elongate structure, attached to one side on the wall of the ejaculatory duct. Histological studies showed the presence of three cell types, which differ in size, shape of nuclei, and presence or absence of secretory vesicles. Type I cells are small with large nuclei whereas type II cells are large with small nuclei. Type III cells are intermediate in size and exhibited streak-like nuclei and transparent cytoplasm. Seasonal changes were discerned in the morphology, histology and secretory activity of the gland. March-June appeared to be the active season with type II cells containing secretory vesicles. The mode of release of secretion found to be holocrine. The secretory activity almost completed by July-August (the mating season) with vacuolization of type II cells. The gland remained inactive from September-December with abundance of vacuoles, scattered pycnotic nuclei, indistinct cell membranes and total cellular degeneration. January-February was the revival period with type I cell proliferation. The present study revealed that the secretory activity of the gland is in tune with the male reproductive cycle. © 2013 Versita Warsaw and Springer-Verlag Wien.

Aarif K.M.,Mary Matha Arts and Science College | Prasadan P.K.,Mary Matha Arts and Science College
Journal of Environmental Biology | Year: 2014

During the study on the foraging ecology of the migratory shore birds of Kadalundi, several injured birds were observed. Detailed investigation revealed that out of 28 species of migratory birds recorded from the area under study, 16 individual shorebirds belonging to six species were found injured. All injured species belonged to distant migrant category. One Whimbrel (Numenius phaeopus) was observed throughout the period of study. Lesser Sand Plover (Charadrius mongoious), Black-headed Gull (Larus ridibundus), Little Stint (Caiidris minuta), Grey Plover (Piuviaiis squatarola) and Common Redshank (Tringa totanus) were other species of injured birds observed. Direct observation method was followed for the study during 2005 to 2012. The Kadalundi-Vallikkunnu Community Reserve is one of the most important wintering ground and stop-over for migratory shorebirds in the West Coast of India. Anthropogenic activities may be the major reasons attributable to the bird injury. © 2014 Triveni Enterprises, Lucknow (India).

Smija M.K.,Mary Matha Arts and Science College | Sudha Devi A.R.,Mary Matha Arts and Science College
Turkish Journal of Fisheries and Aquatic Sciences | Year: 2015

The seasonal changes in the ovary of T. schirnerae were described based on histological and histochemical analyses. The development of oocytes was divided into ten stages: oogonia, chromatin nucleolus (1 to 3), perinuclear, primary vitellogenic, secondary vitellogenic (1 to 3) and tertiary vitellogenic. The seasonal ovarian development was classified into six phases: proliferation, previtellogenic, primary vitellogenic, secondary vitellogenic, tertiary vitellogenic and oosorption. Yolk accumulation started during primary vitellogenesis, when basophilic small yolk globules appeared at the cortical cytoplasmic region. The highly basophilic large yolk globules of secondary vitellogenic stage 1 underwent a series of morphological changes to become mildly basophilic yolk platelets in secondary vitellogenic stage 2. The ooplasm noted with strongly acidophilic large yolk platelets in secondary vitellogenic stage 3. The entire ooplasm formed an acidophilic, homogeneous matrix during tertiary vitellogenic stage. The primary vitellogenic stage oocytes showed a strong positive reaction to PAS and MBB, indicating the glycoproteinaceous nature of the yolk. In the secondary and tertiary vitellogenic oocytes, yolk platelets showed positive reaction for MBB, PAS and Sudan black B, demonstrating the lipoglycoproteinaceous nature of the yolk. In T. schirnerae, vitellogenesis extended from October to March and spawning occurred in April. It is concluded that T. schirnerae is an annual breeder accommodating a single ovarian cycle during the intermoult period. © Published by Central Fisheries Research Institute (CFRI) Trabzon, Turkey.

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