https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:48355 Wed 15 Mar 2023 10:59:52 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:22365 Wed 11 Apr 2018 15:33:32 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:44296 1.5-fold). Strain MAS1 grown at pH 3.5 showed a reduction (1.5-fold) in carbohydrates while strain MAS3 exhibited a 17-fold increase in carbohydrates as compared to their growth at pH 6.7. However, lower levels of biologically excess concentrations of the selected transition metals at pH 6.7 unveiled positive or no effect on physiology and biochemistry in microalgal strains, whereas growth with higher metal concentrations at this pH resulted in decreased chlorophyll content. Although the bioavailability of free-metal ions is higher at pH 3.5, as revealed by Visual MINTEQ model, no adverse effect was observed on chlorophyll content in cells grown at pH 3.5 than at pH 6.7. Furthermore, increasing concentrations of Fe, Mn and Zn significantly upregulated the carbohydrate metabolism, but not protein and lipid synthesis, in both strains at pH 3.5 as compared to their growth at pH 6.7. Overall, the impact of pH 3.5 on growth response suggested that acclimation of microalgal strains to acidic pH alleviates metal toxicity by triggering physiological and biochemical changes in microalgae for their survival.]]> Tue 11 Oct 2022 16:05:47 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:34680 50's of their offspring. Zn tolerance was lost after translocation. Zn EC₅₀ values of offspring from transplanted adults bore no relation to the Zn EC₅₀'s of their location of origin. Thus the initial tolerance observed could be attributed to acclimation transferred to the F₁ generation.]]> Thu 11 Apr 2019 15:08:32 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:51787 Mon 18 Sep 2023 15:18:36 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:37159 Desmodesmus sp. MAS1 and Heterochlorella sp. MAS3 can be acclimated to extreme-acidic pH for sustainable production of biomass and biodiesel. Growth analysis indicated that both the microalgal strains possessed a passive uptake of CO₂ at pH 3.0 with biomass production of 0.25 g dry wt. L⁻¹ in Desmodemus sp. and 0.45 g dry wt. L⁻¹ in Heterochlorella sp.. Flow-cytometry analysis for reactive oxygen species, membrane permeability and neutral-lipids revealed the capabilities of both strains to adapt to the stress imposed by acidic pH. Lipid production was doubled in both the strains when grown at pH 3.0. In-situ transesterification of biomass resulted in 13–15% FAME yield in the selected microalgae, indicating their great potential in biofuel production.]]> Mon 12 Apr 2021 15:05:01 AEST ]]>