The current study explores the possibility of using a polyethyleneglycol(PEG)/ammonium sulphate aqueous two-phase system (ATPS) as an early step in a process for the purification of a model 6.1 kbp plasmid DNA (pDNA) vector. Neutralised alkaline lysates were fed directly to ATPS. Conditions were selected to direct pDNA towards the salt-rich bottom phase, so that this stream could be subsequently processed by hy...
The main purpose of this paper is to present and discuss the results of a regional survey on buyer and consumer's behaviour. Results allow us to identify consuming buyer patterns and relate them to consumer's attitudes and caracteristics such as age, sex and educacional levels.They also suggest some important variables than can be used to differentiate portuguese "Quality Wines Produced in Specified Regions" (Q...
Face a um consumo tendencialmente em regressão e a uma concorrência acrescida, a diferenciação da produção de vinho portuguesa assume particular relevo. Neste contexto, a criação de diversas novas regiões determinadas e o incremento da produção de V.Q.P.R.D. reforçam a necessidade de conhecer os comportamentos dos compradores/consumidores e os factores que mais influenciam as suas escolhas. Nesta comunicação pr...
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