Processes Occurring within the Biofilm

Biological filtration is a complex process consisting of two consecutive stages. The nutrient transport stage, which is influenced by various fluid mechanical and surface-physical factors, represents a precondition for the biochemical process taking place within the biofilm. Biological water filtration is based on the catalyzed decomposition of contaminant molecules with the help of enzymes. This article, in addition to describing the conditions and mode of action typical within this second stage, also aims to explore the practical implications of the established results, including the controllability of biological reactors

Magyar Gyógypedagógia 02 (1910) 09

A Magyar Gyógypedagógiai Társaság folyóirata 2. évfolyam, 9. szám, Budapest, 1910. Havi folyóirat a fogyatékosok (siketnémák, vakok, szellemileg gyengék, beszédhibások, idegesek, epileptikusok és nyomorékok) ügyeinek tárgyalására. 1939-től beolvadt a Magyar gyógypedagógiai tanárok közlönyébe

LCST-type thermoresponsive behaviour of interpolymer complexes of well-defined poly(poly(ethylene glycol) methacrylate)s and poly(acrylic acid) synthesized by ATRP

Unexpected tremendous effect of poly(acrylic acid) (PAA) as polydonor on the thermoresponsive behaviour of the comb-like poly(poly(ethylene glycol) methacrylate) (PPEGMA500) with short poly(ethylene glycol) (PEG) side chains as H-bond acceptor, both synthesized by atom transfer radical polymerization (ATRP), has been found indicating the formation of a unique class of interpolymer complexes between these well-defined polymers. Strikingly, the aqueous solutions of the PPEGMA500-PAA interpolymer complexes possess LCST-type thermoresponsive behaviour with hysteresis at significantly lower temperatures (∼40–50 °C) than that of PPEGMA500, which is attributed to the decreased hydrophilicity of the complexes. It is revealed that thermal phase transition temperatures (TPT) of the PPEGMA500-PAA interpolymer complexes have a minimum in the near of 1.3 ethylene glycol/acrylic acid (EG/AA) monomer unit molar ratio, in accordance with the dynamic light scattering (DLS) results, and the TPT can be fine tuned by varying the EG/AA ratio, the molecular weight of the PPEGMA500 and pH of the solution. © 2017 Elsevier Lt