reactions specifically involved in tryptophan biosynthesis are under the T?ntrol of four genes in Neurospora crassa (AHMAD and CATCHESIDE 1960). The complexity of the gene-enzyme relationships in this pathway was discovered by AHMAD and CATCHESIDE (1960) and AHMAD, KHALIL, KHAN and MOZMADAR (1964) who demonstrated that lesions at one of these genes, tryp-2, could prevent either the accumulation...

In this paper, I test by numerical simulations the results of Del Popolo & Gambera (1998), dealing with the extension of Chandrasekhar and von Neumann’s analysis of the statistics of the gravitational field to systems in which particles (e.g. stars, galaxies) are inhomogeneously distributed. The paper is an extension of that of Ahmad & Cohen (1974), in which the authors tested some results of t...

abu ahmad askari - the scholar, philologist and hadith teller - was living in askar makram city that unfortunately this city and his literary works have lost. he wished to meet the scientist – saheb ibn abad. but why the works of abu ahmad and his hometown scientists were lost while they caused the progress of literature especially in elementary literary criticism and created a dam against the ...