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Vijay Kumar, K.
- Mineral Chemistry and Genesis of Phlogopites from the Gabbros of Ravipadu, Prakasam Province, Andhra Pradesh, India
Authors
1 School of Earth Sciences, Swami Ramanand Teerth Marathwada University, Vishnupuri, Nanded 431603, IN
2 Department of Geology, Post-Graduate College of Science, Saifabad, Hyderabad-500004, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 53, No 1 (1999), Pagination: 39-48Abstract
In the Ravipadu gabbro pluton (RGP), Prakasam province, Andhra Pradesh, phlogopites occur as coronal rims along the interfaces between plagioclase-olivine, pIagioclase-ilmenite and rarely plagioclase-clinopyroxene, and as independent grains grown at the expense of intercumulus pyroxenes.
The changes observed in the chemical composition of phlogopites are in the contents of MgO, FeO1 and TiO2 SiO2 and Al2O3 do not show much variation and K2O is almost constant, Na2O is low and CaO is absent. Calculated end members are rich in phlogopite, Ti-phlogopite and eastonite components.
The phlogopites faithfully record the progressive iron enrichment trend of the original phases and consequently that of tholeiitic parental magma. It is established that in a single phlogopite the Mg number, and Mg, Fe, and Ti contents are controlled by its habit, whereas in a series of rocks the phlogopite composition is steered by the composition of host rock. Concentrations of A1 and K in the Ravipadu phlogopites are independent of chemistry of minerals that are consumed and also evolutionary history of the parental magma but are a signature of "chemical collaboration" of interacting fluid with original mineralogy. Textural features and geochemical traits of the phlogopites suggest probable attainment of perfect equilibrium between the fluid and primary phases during the formation of phlogopites in the RGP.
Keywords
Geochemistry, Phlogopites, Gabbros, Prakasam Province, Andhra Pndesh.
- Distributed Search in P2P Networks Through Secure-Authenticated Content Management Systems
Authors
1 Department of Computer Science & Engineering, P.V.P. Siddhartha Institute of Technology, Vijayawada, IN
Source
Data Mining and Knowledge Engineering, Vol 3, No 9 (2011), Pagination: 532-538Abstract
Peer-to-peer (P2P) networks are vulnerable to peers who cheat, propagate malicious code, leech on the network, or simply do not cooperate. The traditional security techniques developed for the centralized distributed systems like client-server networks are insufficient for P2P networks by the virtue of their centralized nature. The absence of a central authority in a P2P network poses unique challenges for reputation management in the network. These challenges include identity management of the peers, secure reputation data management, Sybil attacks, and above all, availability of reputation data. In this paper, we present a cryptographic protocol for ensuring secure and timely availability of the reputation data of a peer to other peers at extremely low costs. The past behavior of the peer is encapsulated in its digital reputation, and is subsequently used to predict its future actions. As a result, a peer's reputation motivates it to cooperate and desist from malicious activities. The cryptographic protocol is coupled with self-certification and cryptographic mechanisms for identity management and countering Sybil attack. We illustrate the security and the efficiency of the system analytically and by means of simulations in a completely decentralized Gnutella-like P2P network.Keywords
Like A Certificate Peer-To-Peer Networks, Distributed Systems, Security, Reputations and Identity Management.- Cognitive Enhancing Effect of Murraya koengii Leaves by Radial Arm Maze Test in Rats
Authors
1 Vijaya College of Pharmacy, Munaganoor – 501511, Hyderabad, Telangana, IN
Source
Research Journal of Pharmacology and Pharmacodynamics, Vol 8, No 2 (2016), Pagination: 71-74Abstract
The study was designed to assess the cognitive enhancing potential of Murraya koengii leaves by using radial arm maze test in albino rats. The radial arm maze test consists of a total 7 days session. During first 6 days training session (habituation phase) rats were placed individually in the central hub and were allowed to choose the arm containing the food freely for a period of 5 minutes. The time taken by each rat to find the food was considered to assess RAM performance. Latency to find the food was noted as an index of memory. The same procedure was repeated with test and standard treated rats after one hour of administration of murraya koengii chloroform extract 100 mg/kg and Piracetam 200 mg/kg. After 6 days training session, 7th day session includes induction of short term memory loss in control rats by administration of propofol 0.5 ml/200g (amnesia inducer) followed by latency to find the food is noted for a period of 5 minutes for each rat. Repeat the same propofol treatment on 7th day for test and standard treated rats after 1 hr of administration of extract (Murraya koenigii 100mg/kg) and piracetam (200mg/kg) and the latency to find was recorded for 5 minutes. It was found that the latency to find food on 7th day of radial arm maze test in control rats after administration of propofol is 2.59 seconds, whereas latency to find food with test extract treated rats on 7th day was found to be 2.20 seconds. This suggests that decrease in the latency for food (sec) with Murraya koengii leaves extract has significantly increased the memorizing ability of rats to find food. Hence it indicates that Murraya koenigii leaves at a dose of 100mg/kg produces significant cognitive enhancing potential in albino rats. However the memory enhancing potential of Murraya koenigii leaves was found to be lesser that standard drug piracetam (latency for food 2.05 seconds) in Radial arm maze test.Keywords
Cognitive Enhancing, Murraya koenigii, Latency for Food, Radial Arm Maze Test.- Genetic Divergence In Baby Corn (Zea Mays L.)
Authors
Source
International Journal of Innovative Research and Development, Vol 2, No 8 (2013), Pagination:Abstract
A field experiment was conducted with 80 genotypes in three replications in randomized block design at College Farm, College of Agriculture, ANGRAU, Rajendranagar during Kharif 2011-2012. The data on baby corn yield and other traits were results indicated that the varieties were distributed in eight clusters of which cluster VI had maximum intra- cluster distance (3.09) followed by cluster III (3.01) cluster I (2.99) and cluster V (2.85) and remaining clusters are having minimum cluster distances with the zero. The inter- cluster distance ranged from 2.32 (clusters V and IV) to 9.32 (clusters VII and VI). Among the clusters variations were planted height, ear height, baby corn length, cob weight, number of cobs per plant, cob yield per plant, cob yield and green fodder yield. The contribution of each character towards total genetic diversity. In that out of 13 characters plant height (42.31%), ear height (16.84%), baby corn length (17.22%) and cob yield (7.97) contributed high for divergence.
Keywords
Baby corn, clusters, genetic diversity, inter cluster distancesFull Text
- Anodic Behaviour of Ti-12 in Various Electrolytes
Authors
1 Department of Chemistry, University College of Engineering, Osmania University, Hyderabad-500007, Telangana, IN
Source
Journal of Surface Science and Technology, Vol 34, No 3-4 (2018), Pagination: 81-86Abstract
Anodization of Ti-12 alloy has been carried out in various electrolytes at different constant current densities and temperatures. Kinetics of anodic films was studied in different electrolytes at different constant current densities ranging from 4mAcm-2 to 64mAcm-2 and at different temperatures ranging from 298 to 338K. From the plots of formation voltage (V) vs time (t), rates of formation were calculated. The rate of film formation and breakdown voltage increase with increase in constant current density while decrease with increase in temperature. The kinetics were found better in sulphamic acid electrolyte at room temperature compared to other electrolytes at the same anodizing conditions.Keywords
Anodization, Constant Current Density, Formation Rate, Titanium-12.References
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