In this research, three alternative approaches to chemical preservatives to extend the mold free shelf-life and quality of pita bread were investigated namely: Modified Atmosphere Packaging (MAP) involving gas packaging, oxygen absorbents technology and ethanol vapor generators, high pressures, and direct and indirect heating. / Gas packaging using 60%CO2 (balance N2) inhibited the growth of Aspergillus niger and Penicillium notatum from 3d (pita bread packaged in air) to 35d at ambient temperature. A longer extension in shelf-life (42d) was possible using an Ageless oxygen absorbent or a Freshmax oxygen absorbent label in conjunction with gas packaging. / Similar results were obtained with 2G--4G sachets of Ethicap, and 100--200S sachets of Negamold, a dual functional oxygen absorbent-ethanol vapor generator. / High pressures (30--400MPa) used to inhibit mold growth, resulted in delamination of the packaging film and textural changes to the pita bread. / Other alternatives, such as direct heating and microwave processing had a minimal effect in increasing the shelf-life of pita bread. (Abstract shortened by UMI.)

The use of a direct method for measuring respiration and transpiration rates may lead to better storage control systems and closer observation of storage losses. A laboratory scale environmental chamber was constructed and provided with a fan and adjustable louver to obtain variable ventilation flow rates. Flow rates were determined using a pressure sensor and fan characteristic curves which were determined experimentally. A regression equation representing the flow rate versus pressure relation was derived and used for estimating the flow rates throughout the study. / Respiration and transpiration were simulated using precision heat sources ranging from 15 to 105W in 15W interval and an evaporative pad. Measured wet and dry bulb temperatures and ventilation flow rates were used for the estimation of heat and moisture generated inside the chamber. The work was performed in two parts. In the first, precision heat sources were used and the heat balance equation components were solved. / In the second part, heat and moisture were generated inside the chamber, heat and moisture balance equations as well as psychrometric equations were solved. (Abstract shortened by UMI.)

The purpose of this study was to explore what contributes to resilience in females diagnosed with Fragile X Syndrome. Fragile X Syndrome can be defined as an inherited (genetic) condition that causes mental impairment, attention deficit and hyperactivity, anxiety and unstable mood, autistic behaviours, hyper-extensible joints, and seizures. I became aware of Fragile X Syndrome during my time as a live-in caretaker to an adolescent female who was diagnosed with Fragile X Syndrome. Because she coped with her disability so resiliently, I was encouraged to explore what contributes to resilience in females diagnosed with Fragile X Syndrome. I followed a qualitative approach, anchored in the interpretivist paradigm. This means that I tried to understand the resilience of females diagnosed with Fragile X Syndrome through the meanings that the participants in my study assigned to them. Furthermore, I worked from a transformative paradigm, which meant that I was interested in changing the traditionally negative ways in which females diagnosed with Fragile X Syndrome are seen. I followed a multiple case study approach, which included four case studies. I conveniently selected the first participant, but realised that convenience sampling was not very credible for a qualitative case study. An Advisory Panel was then used to purposefully recruit three more participants. In order to explore what contributed to their resilience, I made use of interviews, observations, and visual data collection. I also interviewed adults (e.g. parents, teachers and consulting psychologists) who were significantly involved in the lives of my participants. My findings suggest that resilience in females with Fragile X Syndrome is rooted in protective processes within the individual as well as within her family and environment. Because my findings do not point to one specific resource, my study underscores newer understandings of resilience as an Eco systemic transaction. Most of the resilience-promoting resources noted by the participants in my study as contributing to their resilience have been identified as resilience-promoting in previous studies. Although the themes that emerged in my study have been reported in resilience previously, I make a contribution to theory because I link traditional resilience-promoting resources to resilience in females diagnosed with Fragile X Syndrome. Peer support was previously reported as a resilience-promoting resource, but in my study I noticed that the main source of peer support came from peers who were also disabled. Furthermore, my study transforms how we see females diagnosed with Fragile X Syndrome. This transformation encourages communities and families to work together towards resilience in females diagnosed with Fragile X Syndrome. / Ph.D, North-West University, Vaal Triangle Campus, 2011

From the researcher’s personal work experience it was found that there appeared to be a cycle of poverty and welfare dependency in multi–problem poor families. This research was undertaken as a means to lay foundational work in identifying risk and protective factors in multi–problem poor families living in Cape Town. A qualitative research approach was utilised and interviews were conducted with participants that met the selection criteria. The objectives of the research were to gather data in the form of deep, descriptive narrative accounts of multi–problem families’ chronosystems and current life issues, with a focus on the life challenges and difficulties that put the family at risk. The data was collected by means of interviews utilising a semi–structured interview schedule as well as tools such as genograms, ecomaps, and life lines (see Addendum 4). Analysed data indicated themes of intergenerational risk factors that included substance abuse, domestic violence, teenage pregnancy and early school dropout. It was also found that within the current generation, absent parents was a major risk factor for children. Protective factors and variables that promoted resilience in families were also explored. It was found that religious beliefs, community support systems and personal resources were the major protective factors in these families. The research findings led to the identification of a number of early–intervention projects and programmes that could be implemented to address the identified risk factors in multi–problem poor families. These interventions include school literacy and support programmes, improved sex education in schools and community support forums. / Thesis (M.A. (MW))--North-West University, Potchefstroom Campus, 2012.

In South Africa today many adolescents are faced with having to cope with their parents' divorce. There are many risks that occur when adolescents are faced with divorce. Of late research has suggested that parental divorce is an increasingly common phenomenon in black families, but there is no literature which focuses on what contributes to black adolescents coping resiliently with their parents' divorce. The purpose of this study was to provide answers, by means of a literature review and empirical research, to what the antecedents of resilience are among black adolescents coping resiliently with their parents divorce. This was achieved by using a qualitative phenomenological design: ten semi-structured interviews were conducted with resilient black adolescents coping well with their parents' divorce. This study makes a contribution to theory because it suggests a new resilience -promoting resource for black youth from divorced homes, namely dedicated support from friends and teachers (support that is 'always' available), not noted in previous resilience studies. This study also contributed to theory by confirming that resilience promoting processes such as community-facilitated spaces (hostel residence), extra-curricular activities at school and cultural rites encourage resilience among youth whose parents are divorced. This has not been noted in previous literature studies. The findings of this study were used to draft recommendations for Life Orientation teachers on how to encourage resilience among black South African adolescents coping with the adversities of their parents' divorce. In so doing my study made a potential contribution to practice. / Thesis (M.Ed.)--North-West University, Vaal Triangle Campus, 2009.

The focus of this empirical study was on the antecedents of resilience among poor, English second-language (ESL) adolescent learners. The reasons why some adolescents in this situation are resilient and others are not, are indicated in this study. Adolescents qualify as being resilient if they are exposed to significant threat to their development, indicating high risk to the individual, and their adaptation to the threat is successful, due to support, resources or intervention. Thirty three resilient and 32 non -resilient poor, ESL adolescent learners were selected to participate in the empirical study. My study was a mixed method study because I made use of quantitative research (a survey questionnaire completed by the 65 selected learners), and qualitative research (semi-structured interviews with two identified resilient learners and a group interview with elders who are knowledgeable about young people in this community). The conclusions of my study emphasise that dynamic interactions between individual attributes, familial support, community resources, and cultural ties empower some adolescents to overcome hardships and be resilient. My findings are supported by literature. My findings cannot be generalised, as the adolescents in my study were all black, South African youth from an impoverished community in the Vaal Triangle. This is an explorative study, and themes that were identified as contributing to resilience in my study, need to be explored in future studies. / Thesis (M.Ed.)--North-West University, Vaal Triangle Campus, 2009.

The purpose of this study was to document, by means of a literature review and empirical research, the phenomenon of resilience among adolescents with learning difficulties (LD). My study was motivated by a gap in current literature. Although there are some South African studies that explore the personal antecedents of resilience in youth with LD, there were almost no studies explaining what interpersonal antecedents might contribute to resilience. The aim of the empirical study was to investigate the phenomenon of resilience among adolescent learners coping with LD. This was done by conducting phenomenological research with ten learners who have LD and attend a school for learners with special learning needs. The findings of the study are in accordance with previous studies that suggest that resilience is encouraged by dynamic processes that are both interpersonal and intrapersonal. This study makes a contribution to theory in that it suggests that resilience among adolescent learners with LD is also encouraged by their home environment and the positive relationship with siblings that might be brought on by parents treating all their children impartially. This has not been noted in previous studies. This study also raises questions about whether inclusion of all learners in mainstream schools are beneficial to learners with LD. Because my study identified interpersonal processes (unconditional acceptance, safe spaces, championship and pedagogical expertise) that promoted resilience among those participants who took part in my study, my study contributes to what was understood about the process of resilience in learners with LD and in so doing contributes to practice in that guidelines could be drafted for Life Orientation teachers based on the findings of this study. These guidelines can enable dedicated teachers to adapt their classroom environment so that a learner with LD can benefit. / Thesis (M.Ed.)--North-West University, Vaal Triangle Campus, 2009.

The chief focus of this study was on unearthing the antecedents of resilience in children on the street and street children in institutional care. This study was motivated by the desire to understand what made some street children function resiliently in spite of the individual, familial, environmental and wider community risk process that threaten resilience. I was alerted to the participants' resilience by the unexpected positive findings after they completed the Child and Youth Resilience Measure (CYRM). Twenty street children volunteered to take part in this study. Of the 20 participants who took part in this study, 14 were children on the street who still had contact with families and six resided at a shelter with no regular contact with their families. This was a mixed methods exploratory study in which I employed the Child and Youth resilience Measure (CYRM) to collect quantitative data from all the participants, and qualitative data via individual interviews and a focus group interview. I used the interviews to provide a deeper understanding of the antecedents of resilience identified in the CYRM. My findings from this study documented individual and environmental resilience processes that enabled the participants to function resiliently despite the harshness of streetism. Many of the resilience -promoting resources unearthed have not been linked to street children and previous studies on resilient street children have not noted all inter- and intrapersonal resources identified by the street children in my study. These resources included individual resources such as role models, assertiveness, regulating themselves socially, coping mechanisms, community - based resources such as access to education as well as cultural resources which include cultural groundedness and religion. These findings show that some street children are resilient and that they develop coping mechanisms reminiscent of hidden resilience that enable them to cope with streetism. The findings of this study have implications for practice especially asset-focused approaches to supporting street children. / Thesis (Ph.D. (Education))--North-West University, Vaal Triangle Campus, 2009.

Existing literature on resilience portrays middle-born children as vulnerable. Middle-born children have to face many risks, such as a tendency towards delinquent behaviour, having poor relations with family members, being low achievers and harbouring negative feelings. Many children who face risk and who consequently are in danger of maladaptive outcomes manage to bounce back from these risks. Such children are called resilient. Research suggests that resilience among children is a common phenomenon, but no literature exists that focuses specifically on resilience among middle-born children. Because of personal experience, I as the researcher believe middle-born children can display resilience in the face of their particular risks. The purpose of this study therefore was to explore, by means of a literature study and empirical research, what the antecedents of resilience among middle-born children might be. This was done by using a concurrent triangulated mixed method design: Six resilient middle-born children completed a self-report questionnaire (RSCA) and participated in semi-structured interviews. The findings were mixed and allowed understanding of what encourages resilience in middle-born children. This study contributes to theory by identifying the resilience-promoting processes (both intra- and interpersonal) which contribute to resilience among middle-born children. This study's findings also transform the stereotypical view of middle-born children as vulnerable only. / Thesis (M.Ed.)--North-West University, Vaal Triangle Campus, 2011

This empirical research study focuses on the qualities of resilient adolescents in a technical school. The study indicates why some adolescents in a technical school are resilient, while other adolescents in this technical school are not resilient. Thirty resilient and thirty non-resilient adolescents in a technical school were chosen to participate in the empirical study. The empirical study consisted of quantitative research (a questionaire that was completed by the sixty adolescents), and qualitative research (three chosen resilient adolescents took part in an interview). This study is therefore a mixed methods study. The conclusions of the study were supported by the literature. The qualities of the resilient adolescent in a technical school are similar to the qualities of resilient adolescents in other contexts. Resilient adolescents in this technical school were characterized by protective factors and processes that had their roots in the individual, the community, culture and relationships. This study is an explorative study. More rigorous research is needed before this study's findings can be generalised. / Thesis (M.Ed.)--North-West University, Vaal Triangle Campus, 2008.