Sirs — Graptolites of Arenig age have been discussed repeatedly from the Ballantrae Complex (Stone & Strachan 1981; Stone & Rushton 1983, 2003; Rushton et al. 1986; Rushton & Stone 1988). The inferred biostratigraphic ranges were estimated to be from the basal Arenig Tetragraptus approximatus Biozone to the early Yapeenian. As the exact dating of the graptolite faunas in this sequence has some ...

Rkeemment, Rushton affirmait qu 'il existe des diff~rences importantes dans les taux de criminalitg entre les groupes raciaux. Ses mthodes d'analyse statistique (l'analyse de variance), cependant, ne fait pas ressortir la grandeur de ces difflrences. Les auteurs ont rO-analys les donnes de Rushton et dmontrent qu 'il n 'y a pas de rapports fermes entre les facteurs (le coifficient de corr~latio...

Semi-solid aluminium alloy processing (SSM) has advanced into a more mature process with many applications. The current paper aims to investigate the in-process behaviour of production slurry using an engineering approach estimate properties. A method assess rheological properties semi-solid metal was tested and found capable producing meaningful measurements. foundations this were use Rushton ...

The synthesis of kojic acid derivative (KAD) from kojic and palmitic acid (C16:0) in the presence of immobilized lipase from Rhizomucor miehei (commercially known as Lipozyme RMIM), was studied using a shake flask system. Kojic acid is a polyfunctional heterocycles that acts as a source of nucleophile in this reaction allowing the formation of a lipophilic KAD. In this study, the source of bioc...

Double- to single-loop pattern transition and a significant reduction in the power number with decrease clearance of Rushton turbine impeller baffled reactor was elucidated earlier research works. The present work investigates physical reasons behind these phenomena using computational fluid dynamics approach. Reynolds Averaged Navier–Stokes equations standard turbulence model closure were used...