Isolation and identification of native lower fungi for polyunsaturated fatty acid (PUFA) production in Thailand, and the effect of carbon and nitrogen sources on growth and production

This research focuses on isolation and identification of polyunsaturated fatty acid (PUFA) producing fungi from natural sources of Thailand, followed by experimental designs for carbon and nitrogen utilizations of the potential strains. The results show that 8 and 16 isolates of lower fungi from freshwater and wet-fallen leaves, respectively, could produce PUFAs. Among these isolates, the NR06 that was isolated from wet-fallen leaves at Tad Ta Phu waterfall, Nakhon Ratchasrima province. They showed the highest level productions of both biomass (15.49±0.24 g×l-1) and total fatty acids (16.44±0.30%). The major essential fatty acid composition was found to be arachidonic acid (ARA; C20:4n6) (32.24±0.35%). The minors were linoleic acid (C18:2n6) (8.26±0.59%) and γ-linoleic acid (GLA; C18:3n6) (5.48±0.08%). Besides the morphological characterization, taxonomic identification by the 636 bp-ITS region sequencing and phylogenetic analysis were performed. It was demonstrated that the fungal isolate NR06 was classified in the closest species of Mortierella elongata with 99% similarity (GenBank accession no. KF181625). Statistically based experimental designs (Design Expert 7.1 software) were applied to the optimization of biomass and fatty acid production in the NR06 culture. Using the glucose as a carbon source, there was a significant effect on both biomass and ARA production (p-values < 0.0001), whereas using yeast extract as a nitrogen source affected only ARA production (p-value = 0.02). It was suggested that the NR06 isolate could be further optimized for an improvement as a potential ARA producing strain.Keywords: Polyunsaturated fatty acids (PUFAs), arachidonic acid (ARA), lower fungi, Mortierella elongata.Abbreviation: PUFAs, Polyunsaturated fatty acids; ARA, arachidonic acid

Still Working With “Involuntary Clients” In Youth Justice

A lack of active participation from children and young people in the design and delivery of youth justice services has culminated in the effectiveness of the Youth Justice System being reduced. There has been little independent scrutiny and to add to that strategic direction on how children’s voices are or should be accessed in practice. In the light of this, the paper explores the various challenges associated with promoting the active participation of young people who have offended. More specifically, the paper explores the difficulties engaging those who are disengaged as such individuals may perceive the support on offer as unnecessary and intrusive. The paper argues that in order to reconcile a lack of engagement and feelings of disempowerment the priority should be throughout the Youth Justice System to involve young people in decision-making processes. Ideas will be put forward with regard to how youth justice practice could become more participatory and engaging particularly with regard to those who are ‘involuntary clients’ or in other words difficult to engage. There is a dearth of ‘hard’ empirical evidence on the effectiveness of participatory approaches in youth justice. However if work with young people who offend is innovative and bespoke to allow for young people’s voices to be heard practice could become more effective. But there needs to be the recognition that the ideas put forward in this paper are not ‘magic bullets’