A REVIEW ON PHYTOCHEMICAL AND PHARMACOLOGICAL SIGNIFICANCE OF CANTHIUM PARVIFLORUM LAM

A large number of medicinal plants are explored from the natural flora for production of commercial drugs. Approximately 20% of the plants found in the world have been submitted to pharmacological or biological tests. Canthium parviflorum is an important medicinal plant used in indigenous system of medicine in India and abroad. To isolate and characterize biologically active molecules, many medicinal plants were screened. Though the medicinal importance of this plant is known, but the potential source of this plant for biologically active molecules is not known. So, the present review on Canthium parviflorum is opens a gateway to find out useful and novel drugs

Evaluate E-Government Security Strategy by using Fuzzy Logic Techniques

The concept of an e-government system is to provide access to government services anywhere at any time over open networks This leads to issues of security and privacy in the management of the information systems Ensuring security of e-government applications and infrastructures is crucial to maintain trust among various departments to store process and exchange information over the e-government systems Due to dynamic and continuous threats on e-government information security policy makers need to perform evaluation on existing information security strategy as to deliver trusted and confidence e-government services This paper presents an information security evaluation framework based on fuzzy logic techniques to help policy makers conduct comprehensive assessment of egovernment security strateg

Experimental observation of the effect of aftercavity interaction in a depressed collector gyrotron oscillator

This paper presents the experimental observation of the effect of an aftercavity interaction (ACI) in a depressed collector gyrotron oscillator. The gyrotron generates an output power of 1.5 MW at 110 GHz in 3 ??s pulses with a 96 kV and 40 A electron beam and has a single-stage depressed collector. The ACI arises from an unintended cyclotron resonant interaction between the microwave beam traveling out from the cavity and the gyrating electron beam. The interaction occurs in the uptaper of the launcher, immediately downstream from the cavity, where the magnetic field is slightly lower than its value in the cavity region. The ACI results in a reduction in efficiency since the electron beam tends to extract power from the wave. There is also a broadening of the spent beam energy profile, which reduces the effectiveness of the depressed collector and in turn limits the overall efficiency of a gyrotron. Measurements of the maximum depression voltage of the collector vs beam current at 96 kV are compared with simulations from the MAGY code [M. Botton, IEEE Trans. Plasma Sci. 26, 882 (1998)]. Excellent agreement is obtained between theory and experiment but only if the ACI is included. In the present experiment, it is estimated that the observed efficiency of 50% would have been about 60% in the absence of the ACI. These results verify the role of the ACI in reducing the efficiency of the gyrotron interaction.open151