Influence of sericin in alleviating the hydrogen peroxide induced oxidative stress in silkworm Bombyx mori: role of the amino acids

Sericin is an important peptide derived from silk fibre spun by the silkworm Bombyx mori and has various biological activities. The aim of the present study was to characterize the major constituents of sericin that are providing cytoprotective effect against hydrogen peroxide-induced cell damage in midgut epithelial cells and hemocytes of silkworm. Extracted sericin was subjected to LCMS analysis for amino acid composition. Isolated cells of midgut and hemocytes were incubated with sericin or with mixture of serine and aspartic acid prior to suboptimal concentration of hydrogen peroxide treatment. Sericin as well as amino acid mixture reduced the activity of antioxidant enzymes triggered by hydrogen peroxide, inhibited oxidative derivatives such as protein carbonyl and malondialdehyde and increased antioxidant capacity in both the cells studied. Furthermore, sericin and amino acid mixture significantly decreased intracellular reactive oxygen species as assessed by fluorescent detection. These results suggest that major constituent amino acids of sericin defend midgut epithelial cells and hemocytes against oxidative damage by scavenging reactive oxygen species rather than activating antioxidant enzyme system thereby inhibiting cell damage

Exploring Student Teachers’ Views on ePortfolios as an Empowering Tool to Enhance Self-Directed Learning in an Online Teacher Education Course

This paper explores Economics student teachers’ views on ePortfolios as an empowering tool to enhance self-directed learning in an online teacher education course. An interpretive phenomenological research approach was employed for data collection and a purposive convenient sampling technique was selected to collect data. Only Postgraduate Certificate of Education (PGCE) and Batchelor of Education (BEd) Senior Phase/Further Education and Training Economics Subject Methodology (SDEC00N) student teachers registered on myUnisa for the modules were targeted. Multiple sections from the ePortfolios that had been considered for the purpose of this study were taken from their creative writing assignments, a research projects, lesson plans, reflective journal entries, podcasts, blog postings. Data were collected and analysed on a weekly basis to create a plethora of information. Student teachers felt that they were empowered with different subject content knowledge, technological pedagogical content knowledge (TPCK) and other technologies, student-centred methods and techniques through the ePortfolio project

Properties of a Discrete Quantum Field Theory

A scalar quantum field theory defined on a discrete spatial coordinate is examined. The renormalization of the lattice propagator is discussed with an emphasis on the periodic nature of the associated momentum coordinate. The analytic properties of the scattering amplitudes indicate the development of a second branch point on which the branch cut from the optical theorem terminates.Comment: 7 pages, 1 figur

Weaving Pathways: The Role of High School Family and Consumer Sciences Courses in Cultivating a Teacher Pipeline Across the Midwest

High School Family and Consumer Science classrooms hold the potential for university and high school partnerships for teacher education pipelines. This study uses a comparative policy analysis to provide a regional resource for laws, policies, and programs within the Midwest regarding FCS classrooms and courses that are offered. Utilizing a comparative policy analysis approach, the aim is to create an opportunity for guiding current high school students toward becoming future candidates in teacher education programs by doing intentional outreach. This analysis will provide an outline of how university Teacher Education programs can partner intentionally to recruit and mentor incoming first-year college students while they are learning educational pedagogy in their high school FCS classrooms. This analysis provides a foundation for how high school FCS classrooms and university teacher education classrooms can foster cohesive and supportive mutually beneficial partnerships in the states surrounding Illinois and Indiana. Data were gathered by accessing regional education department websites and illustrating the potential opportunities for high school coursework to connect with established teacher education university programs and align pedagogically. Key findings include multiple opportunities in the Midwest for partnerships that are mutually beneficial and are easily accessible if intentional connections are made between faculty

College Managers’ Views on The Employability of Vocational Engineering Graduates: A Case of The South African TVET College Sector

This study investigated the required competencies that TVET college engineering graduates need to be employable and become successful entrepreneurs after completing their studies. The study used a qualitative design and semi-structured interviews to collect the data. Purposive sampling was used to select the participants from three public TVET colleges in Gauteng. The study reported that National Certificate Vocational college engineering graduates need relevant engineering content knowledge, authentic practical engineering workplace experience, soft skills, technical skills and their application in the real world. It was also found that the engineering sector has a negative attitude towards TVET engineering graduates and that there is a lack of lecturers with engineering industry experience. We relied on a small sample; hence, the results of this study may not be generalisable, but moving forward, a cross-national study including all TVET programmes may be required; and, most probably, different results will be generated. We concluded by advocating the review of the TVET engineering curriculum and a paradigm shift to an intense formally supervised and examined industry-oriented workplace component that would boost the technical expertise of graduates. A widespread advocacy campaign in the engineering sector could also help to raise their awareness of TVET programmes

Enterprise Combinations in Cassava Based Food Crop Farming System in Nigeria: Evidence from Ogun State

This study examines the enterprise combination in cassava based food crop farming system in Ogun state. Three stage sampling technique was used to select 120 cassava farmers from the study area. The data were analyzed using descriptive statistics, economic land equivalent ratio (ELER), linear programming and stochastic production frontier to actualize all the objectives. Descriptive statistics was employed for the description of socio-economic characteristics while economic land equivalent ratio (ELER) and linear programming were used for cost-return structure and optimal combination of crops in cassava based farm enterprises respectively. Descriptive statistics shows that most of the farmers are in their late forty with the mean age of the farmers being 48.2 years with 6years of formal education and wealth of farming experience of about 19 years. The farmers cultivated area of land that varies between 0.5ha and 5 hectare with a mean of 2 hectare. All enterprise combinations are profitable; however, cassava/maize/vegetable production enterprise is the most profitable with net farm income of N36649.90 per hectare closely followed by cassava /maize with N36462.67 per hectare. The optimal cassava based combination was actualized by linear programming model which shows that cassava/maize and cassava/maize/vegetable are the optimal combination because only the two combinations contributed to the gross margin and also added zero opportunity cost to the total cost of production. The result also shows that land and capital are the limiting resources whereas labour is not which means that for optimal cassava based production land and capital investment should be increased. In lieu of these findings, farmers in Ogun state farmers should intercrop cassava, maize and vegetables or intercrop cassava and maize, this will not only increase their net farm income per hectare, it will also ensure flow of income during on and off seasons. Farmers should also increase the utilization of the limiting resources, that is capital base and hectrage of land cultivated

Nonprofits and the Promotion of Civic Engagement: A Conceptual Framework for Understanding the “Civic Footprint” of Nonprofits within Local Communities

The literature suggests that nonprofit organizations provide civic benefits by promoting engagement within local communities. However, there exists minimal empirical evidence describing the ways in which nonprofits actually undertake this role. In order to address this omission, we conducted interviews with personnel of nonprofit organizations in one rural community in the United States. Our preliminary findings indicate that nonprofit organizations promote civic engagement through programs and activities that: 1) engage volunteers and donors; 2) bring community members together; 3) collaborate with organizations within and beyond the community; and 4) promote community education and awareness. Together, these findings help to develop a working model to understand the civic footprint of nonprofit organizations with methodological implications for future research that would seek to measure the extent to which nonprofits promote civic engagement

Burnout at the Frontline: The Effect of a Reproductive Health Voucher Program on Health Workers in Uganda

Background: Low job satisfaction among healthcare workers in developing countries can increase risk of burnout and have a negative effect on the quality of services. Novel financing strategies such as voucher programs, which aim to increase the utilization of services by the poor by offering physical vouchers for subsidized care, may unintentionally exacerbate burnout for health care workers by creating higher workloads. Methods: A semi-structured survey that included both closed and open-ended questions as well as a locally-adapted job satisfaction scale was used to collect information on provider perceptions of changes in job satisfaction, workload, staffing and salaries since the start of a health voucher program at facilities in fifteen districts in western Uganda. Results: Voucher providers reported feeling more rewarded and more motivated than comparison providers. While frontline workers at both sites were less satisfied than their managers overall (p Conclusions: Providers at voucher facilities may experience a more enabling work environment but job satisfaction differences between manager and frontline workers may intensify when staffing, workload and incentives are not addressed. Strategies to support staff when implementing new demand creation programs should be prioritized. Incentive strategies for staff and management guidance for facilities managers will be important components of successful voucher programs