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Starch containing wastewaters from the food and feed industry have been identified as potential cheap carbon sources for the production of microbial lipids. Due to its high potential lipid content the oleaginous yeast Rhodotorula glutinis is often used for fermentations in this field. Moreover it is investigated in the context of microbial carotenoid production, which also requires a cheap source of carbon. Thus, the ability of R. glutinis (ATCC 15125TM) to degrade and utilize soluble starch for the production of lipids has been assessed in this study. While glucose and fructose were readily consumed from the medium, starch was only slightly reduced in one treatment. The yield of fatty acid methyl esters (FAME) was graduated corresponding to the initial sugar contents, with the highest FAME yield (1.5 g·L-1) at the highest initial sugar content. In the treatment that contained starch as single carbon source, no FAME production was realized. Accordingly, if starchy wastewaters should be used for microbial cultivation with R. glutinis, an enzymatic or chemical pretreatment for starch hydrolysis should be applied, to increase the availability of this carbon source.
Using Ryff’s positive psychological theory as a conceptual framework,
this research was focused on mental health or well-being to explore the degree
to which mental health can be predicted by personality traits and demographic
factors in Nova Scotian youth and young adults. This theory covered all
critical features of well-being by taking benefits from different
developmental, personality and clinical theories. Employing Ryff’s inclusive
theory that covered six dimensions including purpose in life, self-acceptance,
positive relations with others, autonomy, environmental mastery, and personal
growth, the researcher studied the relationship between mental health
components and the locus of control. Participants: One hundred and seventy-two
students of Mount Saint Vincent University were randomly selected and
participated in this study. Measures: All participants completed three
measures, Rotter’s Locus of Control Scale, Ryff’s Psychological Well-Being
Scale and Demographic Questionnaire. Method: Quantitative methods such as
bivariate correlation, ANOVA and hierarchical linear regression were used to
explain the relationships between variables based on the research hypotheses.
Results: The statistical analysis of data revealed that there was a positive
and linear association between the internal locus of control and all six well-being
components. Findings from the current research demonstrated that individuals
who have an internal tendency in their locus of control are in higher levels of
mental health in compression with individuals with external locus of control.
Using hierarchical linear regression revealed that locus of control, gender,
citizenship status, marital status can predict 41% of the variance in
participants’ mental health.