Use of Padé approximants in the evaluation of α and δ for one-dimensional maps

Recently an analytic algorithm for evaluating the Feigenbaum indices of one-dimensional maps was developed using a perturbative expansion. We find that the use of Padé approximants in the resulting asymptotic series, significantly improves the technique.     

Deep inelastic Compton scattering at theep collider HERA

Deep inelastic Compton scattering at HERA is investigated with the intention of determining the usefulness of this process in pinning down the photon and proton structure functions. We examine the contributions of the various _s and _s ² subprocesses that arise from the nonelementary structure of the photon atS _p =30000 GeV². An assessment is made of the sensitivity of this process to the various parton and photon structure functions presently available. In particular we study the possibility of directly measuring the gluon content of the proton and the photon as well as the quark fragmentation into a photon with this process. Theep laboratory frame helps to separate out the different contributions and in particular may allow a quantitative study of the box diagram term.     

Biologically Relevant Macrocyclic Complexes of Copper Spectral, Magnetic, Thermal and Antibacterial Approach

Copper(II) macrocyclic complexes have been synthesized with five novel ligands: L¹-1,7,10,16-tetraaza-2,6,11,15-tetraone-4,13-dithiacycloocta-decane, L²-1,7,11,17-tetraaza-2,6,12,16-tetraone-4,14-dithia-cyclocosane, L³-1,7,10, 13,19,22-hexaaza-2,6,14,18-tetraone-4,16-dithiacyclo-tetracosane, L⁴-1,7,14,20,tetraaza-2,6,15,19-tetraone-4,17,di- thiatricyclo [22, 4, O^21,26, O^8,13] hexacosa-8,10,12,21,23,25-hexene, L⁵- 1,7,13,19,25,26-hexaaza-2,6,14,18 tetraone-4,16 dithia tricyclo [23, 3, 1, I^8,12] hexacosa [8(26), 10, 12, 20(25), 22, 24] hexane and characterized by elemental analysis, molar conductance, magnetic susceptibility, i.r, u.v.–vis, EPR spectral studies, thermal studies and electrochemical properties. The molar conductance measurements of the complexes in DMSO correspond to 1:2 electrolytes. g-Values are calculated for all of the complexes in the polycrystalline form as well as in DMSO solution. On the basis of i.r, electronic and EPR spectral studies a square planar geometry has been assigned to these complexes. Cyclic voltammograms for all the complexes are similar to quasi-reversible redox processes Cu^IICu^II⇆Cu^IICu^I⇆Cu^ICu^I. The complexes were also evaluated against the growth of bacteria (S. fecalis and E.coli) in vitro. An erratum to this article is available at .     

Improvement of cellulase activity inTrichoderma

The conditions for the production and regeneration of protoplasts fromTrichoderma reesei QM 9414 were optimized. Mutants obtained fromTrichoderma reesei QM 9414 were crossed, using protoplast fusion. In the crosses attempted, the diploids showed enhanced yields of exoglucanase, whereas the yield of endoglucanase and β-glucosidase was intermediate as compared to their respective parents. In some of the segregants, the yields were further enhanced, indicating the use of protoplast fusion techniques in developing breeding strategies for strain improvement. The study of cellulase mutants as such and the segregants revealed that the three cellulase components appear to be regulated independently of each other.