information concerning the life cycle of the sigma virus in Drosophila M?ayaccumulated by means of an assay developed by PLUS (1954). The assay is used to determine the infectious virus content of extracts from infected flies and is based on ax end-point dilution procedure. Aliquots from a series of dilutions are injected into virus-free imagos and the titers calculated from the distribution of...

This article describes the use of a power plant waste-Bottom Ash, as effective adsorbent for the removal of toxic Azo dyes Carmoisine and Chrysoidine Y from their aqueous solution. The paper incorporates comparative study and discussion of the adsorption characteristics of these dyes on the economically effective adsorbent with special emphasis on the effects of time and temperature. The charac...

Meta-heuristics have already received considerable attention in various fields of engineering optimization problems. Each of them employes some key features best suited for a specific class of problems due to its type of search space and constraints. The present work develops a Pseudo-random Directional Search, PDS, for adaptive combination of such heuristic operators. It utilizes a short term...

Analysis of nonlinear autonomous systems has been a popular field of study in recent decades. As an interesting nonlinear behavior, chaotic dynamics has been intensively investigated since Lorenz discovered the first physical evidence of chaos in his famous equations. Although many chaotic systems have been ever reported in the literature, a systematic and qualitative approach for chaos generat...

in this study, the potential of biosorbent obtained from silk maze, was investigated for the batch biosorption of direct red 81 (dr 81) in aqueous solution. the effects of temperature, biosorbent amount, contact time, initial dye concentration and ultrasonic irradiation were also evaluated. furthermore, experimental equilibrium and kinetics data were fitted by langmuir and freundlich isotherms ...

High spatial resolution (HSR) imagery and high density LiDAR data provide complementary horizontal and vertical information. Therefore, many studies have focused on fusing the two for mapping geographic features. It has been demonstrated that the synergetic use of LiDAR and HSR imagery greatly improves classification accuracy. This is especially true with waveform LiDAR data since they provide ...