The influence of female agentic and communal leadership on work engagement : vigour, dedication and absorption

PURPOSE : The purpose of this study is investigating the influence of leadership on work engagement. The definition of leadership is primarily couched in culturally masculine terms (and known as an agentic leadership style) that disfavours women, who are often perceived as being communal leaders who are compassionate and humble. The research gap addressed is whether communal and agentic leadership styles of female leaders have positive associations with work engagement. DESIGN/METHODOLOGY/APPROACH : A quantitative study was undertaken by applying purposive non-probability sampling and using an online survey with screening questions to ensure the respondent reported to a senior female manager. The survey consisted of reliable and valid Likert scales: agentic and communal leadership styles were assessed using the Agency-Communion-Inventory (AC-IN) scale with 20 questions and the Utrecht Work Engagement Scale (UWES-9) with three sub-scales: vigour, dedication and absorption. The 153 usable responses in this study were used to conduct validity and reliability tests and to apply multiple regression to test associations. FINDINGS : Both agentic and communal leadership have a positive impact on work engagement when exhibited by a female. Although agentic leadership had an influence on all the elements of work engagement, communal leadership had a far stronger impact. ORIGINALITY/VALUE : Female managers with communal leadership styles need to realise that they have more influence on their employees’ emotional, physical and cognitive connections to their work than female managers with agentic leadership styles. Those with agentic leadership styles need to exhibit a communal style as well, so as to enhance the influence they have on their employees’ work engagement.https://www.emerald.com/insight/publication/issn/2040-8269hj2024Gordon Institute of Business Science (GIBS)SDG-05:Gender equalitySDG-08:Decent work and economic growt

Vitamin D3 and 25-Hydroxyvitamin D3 Content of Retail White Fish and Eggs in Australia

Dietary vitamin D may compensate for inadequate sun exposure; however, there have been few investigations into the vitamin D content of Australian foods. We measured vitamin D3 and 25-hydroxyvitamin D3 (25(OH)D3) in four species of white fish (barramundi, basa, hoki and king dory), and chicken eggs (cage and free-range), purchased from five Australian cities. Samples included local, imported and wild-caught fish, and eggs of varying size from producers with a range of hen stocking densities. Raw and cooked samples were analysed using high performance liquid chromatography with photodiode array. Limits of reporting were 0.2 and 0.1 µg/100 g for vitamin D3 and 25(OH)D3, respectively. The vitamin D3 content of cooked white fish ranged from <0.1 to 2.3 µg/100 g, and the 25(OH)D3 content ranged from 0.3 to 0.7 µg/100 g. The vitamin D3 content of cooked cage eggs ranged from 0.4 to 0.8 µg/100 g, and the 25(OH)D3 content ranged from 0.4 to 1.2 µg/100 g. The vitamin D3 content of cooked free-range eggs ranged from 0.3 to 2.2 µg/100 g, and the 25(OH)D3 content ranged from 0.5 to 0.8 µg/100 g. If, as has been suggested, 25(OH)D3 has five times greater bioactivity than vitamin D3, one cooked serve (100 g) of white fish, and one cooked serve of cage or free-range eggs (120 g) may provide 50% or 100%, respectively, of the current guidelines for the adequate intake of vitamin D (5 µg) for Australians aged 1-50 years

Prevalence and Predictors of Vitamin D Deficiency among African Immigrants Living in Australia

Vitamin D deficiency (serum 25-hydroxyvitamin D (25(OH)D) concentrations <50 nmol/L) is a public health issue in Australia and internationally. Those with darker skin require a greater dose of ultraviolet B radiation from sunlight than those with paler skin to synthesise adequate amounts of vitamin D. Using data from the 2011–2013 Australian Health Survey, we investigated the prevalence and predictors of vitamin D deficiency in African immigrants aged ≥18 years living in Australia (n = 236). Serum 25(OH)D was measured using a liquid chromatography–tandem mass spectrometry method that is certified to international reference measurement procedures. Poisson regression was used to investigate independent predictors of vitamin D deficiency. A total of 36% of adults were vitamin D deficient (35% of men, 37% of women). The prevalence ratio (PR) of vitamin D deficiency decreased by 2% per year of age (PR 0.98; 95% CI (0.97, 0.99); p = 0.004) and was 1.6 times higher in those with low/sedentary, compared to moderate/high, physical activity levels (PR 1.64; 95% CI (1.12, 2.39); p = 0.011). The greatest risk was for those assessed during winter/spring compared with summer/autumn (PR 1.89; 95% CI (1.33, 2.64); p < 0.001). Culturally appropriate messaging on safe sun exposure and dietary vitamin D is warranted in order to promote vitamin D sufficiency in African immigrants living in Australia.R.M.L. is supported by an Australian National Health and Medical Research Council Senior Research Fellowship. L.J.B. is supported by a Multiple Sclerosis Research Australia Postdoctoral Fellowship and a Curtin University Research Fellowship. E.D. would like to acknowledge the Australian Government Research Training Program Scholarship in supporting this research. The Australian Health Survey was conducted by the Australian Bureau of Statistics (ABS) with funding provided through the ABS health survey programme, the Department of Health and the National Heart Foundation of Australia

Vitamin D3 and 25-hydroxyvitamin D3 content of retail white fish and eggs in Australia

Dietary vitamin D may compensate for inadequate sun exposure; however, there have been few investigations into the vitamin D content of Australian foods. We measured vitamin D3 and 25-hydroxyvitamin D3 (25(OH)D3) in four species of white fish (barramundi, basa, hoki and king dory), and chicken eggs (cage and free-range), purchased from five Australian cities. Samples included local, imported and wild-caught fish, and eggs of varying size from producers with a range of hen stocking densities. Raw and cooked samples were analysed using high performance liquid chromatography with photodiode array. Limits of reporting were 0.2 and 0.1 μg/100 g for vitamin D3 and 25(OH)D3, respectively. The vitamin D3 content of cooked white fish ranged from <0.1 to 2.3 μg/100 g, and the 25(OH)D3 content ranged from 0.3 to 0.7 μg/100 g. The vitamin D3 content of cooked cage eggs ranged from 0.4 to 0.8 μg/100 g, and the 25(OH)D3 content ranged from 0.4 to 1.2 μg/100 g. The vitamin D3 content of cooked free-range eggs ranged from 0.3 to 2.2 μg/100 g, and the 25(OH)D3 content ranged from 0.5 to 0.8 μg/100 g. If, as has been suggested, 25(OH)D3 has five times greater bioactivity than vitamin D3, one cooked serve (100 g) of white fish, and one cooked serve of cage or free-range eggs (120 g) may provide 50% or 100%, respectively, of the current guidelines for the adequate intake of vitamin D (5 µg) for Australians aged 1–50 years. View Full-Text Keywords: food composition data; vitamin D3; 25-hydroxyvitamin D3; fish; eggsSample purchase, preparation and analysis was funded by the Western Australia Department of Health. L.J.B is funded by a Curtin University Research Fellowship; R.M.L is funded by a NHMRC Senior Research Fellowship

rAAV.sFlt-1 Gene Therapy Achieves Lasting Reversal of Retinal Neovascularization in the Absence of a Strong Immune Response to the Viral Vector

PURPOSE. To determine the efficacy of rAAV.sFlt-1-mediated gene therapy in a transgenic mouse model of retinal neovascularization (trVEGF029) and to assess whether rAAV.sFlt-1 administration generated any deleterious, long-lasting immune response that could affect efficacy. METHODS. trVEGF029 mice were injected subretinally with rAAV.sFlt-1 or phosphate-buffered saline. Fluorescein angiography and electroretinography were used to compare the extent of fluorescein leakage from retinal vessels and retinal function, respectively. A group of eyes was enucleated, and the retinal vasculature and morphology were studied by confocal and light microscopy. Cells were isolated from the posterior eyecups and spleens of a further group, and immune cell subset populations were investigated by flow cytometry. sFlt-1 protein levels in the eyes were evaluated by ELISA. RESULTS. After a single rAAV.sFlt-1 injection, sFlt-1 protein levels were upregulated, and there was a reduction in fluorescein leakage from the retinal vessels and an improvement in retinal function. Confocal microscopy of isolectin-IB4-labeled retinal wholemounts showed more normal-appearing capillary beds in rAAV.sFlt-1-injected than in PBS-injected trVEGF029 mouse eyes. Light microscopy demonstrated retinal morphology preservation, with fewer aberrant vessels invading the outer nuclear layer of rAAV.sFlt-1-injected eyes. Furthermore, the immune response to subretinal injection of rAAV.sFlt-1 was limited to a transient increase in CD45 ϩ leukocytes that disappeared by 4 weeks after injection. This transient increase was localized to the eye and did not affect long-term therapeutic efficacy. CONCLUSIONS. The data support the notion that rAAV.sFlt-1 gene therapy is safe and effective for the long-term inhibition of deleterious blood vessel growth in the eye. (Invest Ophthalmol Vis Sci. 2009;50:4279 -4287

Supersite of immune vulnerability on the glycosylated face of HIV-1 envelope glycoprotein gp120

A substantial fraction of broadly neutralizing antibodies (bnAbs) in certain HIV-infected donors recognizes glycan-dependent epitopes on HIV-1 gp120. Here, we elucidate how bnAb PGT 135 recognizes its Asn332 glycan-dependent epitope from its crystal structure with gp120, CD4 and Fab 17b at 3.1 Å resolution. PGT 135 interacts with glycans at Asn332, Asn392 and Asn386, using long CDR loops H1 and H3 to penetrate the glycan shield to access the gp120 protein surface. Electron microscopy reveals PGT 135 can accommodate the conformational and chemical diversity of gp120 glycans by altering its angle of engagement. The combined structural studies of PGT 135, PGT 128 and 2G12 show this Asn332-dependent epitope is highly accessible and much more extensive than initially appreciated, allowing for multiple binding modes and varied angles of approach, thereby representing a supersite of vulnerability for antibody neutralization

Gendering the careers of young professionals: some early findings from a longitudinal study. in Organizing/theorizing: developments in organization theory and practice

Wonders whether companies actually have employees best interests at heart across physical, mental and spiritual spheres. Posits that most organizations ignore their workforce – not even, in many cases, describing workers as assets! Describes many studies to back up this claim in theis work based on the 2002 Employment Research Unit Annual Conference, in Cardiff, Wales

The influence of female agentic and communal leadership on work engagement

In South Africa there is an underrepresentation of females in senior leadership positions. This is partly due to perceptions of incongruence between females and leadership. Along with this, the levels of work engagement amongst employees working in South Africa are extremely low. Both challenges result in negative and costly consequences. Therefore, the aim of this research is to identify the influence that female leaders have on work engagement, focussing on agentic and communal leadership styles, to contribute to the discourse of both challenges. A quantitative methodology was employed to collect the data. The Utrecht Work Engagement scale was used to capture the respondent’s work engagement levels, and the Agency-Communion-Inventory scale to capture the employees’ perceptions of their managers’ leadership style. The relationships between the variables were analysed through multiple regression analysis. Females exhibiting a communal style and those exhibiting an agentic style both influenced work engagement. The agentic style influenced vigour, dedication and absorption, whereas the communal style influenced only vigour and dedication, but had a far stronger association with them. These results encourage management to promote females, with both agentic and communal leadership styles, into senior positions allowing organisations to benefit from higher female representation, including improved work engagement.Mini Dissertation (MBA)--University of Pretoria, 2019.pt2020Gordon Institute of Business Science (GIBS)MB

Prevalence and predictors of vitamin D deficiency in a nationally representative sample of Australian adolescents and young adults

Background/Objectives: Vitamin D deficiency is a public health concern worldwide. Maintaining vitamin D sufficiency during growth periods is essential. We aimed to determine the prevalence and predictors of vitamin D deficiency in Australian adolescents and young adults. Subject/Methods: We used data from adolescents (12–17 years, n = 692) and young adults (18–24 years, n = 400) who participated in the nationally representative 2011–2013 Australian Health Survey. Serum 25-hydroxyvitamin D concentrations were measured using a method certified to international standards, with prevalence reported for 125 nmol/L. Independent predictors of vitamin D deficiency were determined using a survey-weighted Poisson regression model. Results: Overall, 17% of adolescents and 32% of young adults were vitamin D deficient. In models adjusted for sex, age, region of birth, socioeconomic status, BMI and season (and education, smoking status and physical activity in young adults only), the prevalence ratio (PR) for vitamin D deficiency was more than double in participants born outside Australia (adolescents: PR 2.46; 95% confidence interval (CI) = 1.59, 3.81; young adults: PR 2.12; 95% CI = 1.46, 3.07), and also varied by season (adolescents: spring vs summer PR 2.47; 95% CI = 1.22, 5.01 and winter vs summer PR 2.01; 95% CI = 1.03, 3.92; young adults: winter vs summer; PR 3.32; 95% CI = 1.69, 6.53). Other predictors of vitamin D deficiency were overweight compared with healthy weight (adolescents) and lower physical activity (young adults). Conclusions: Strategies based on safe sun exposure and dietary approaches are needed to achieve and maintain adequate vitamin D status, particularly in young adults.RML is supported by an Australian National Health and Medical Research Council Senior Research Fellowship. LJB is supported by a Multiple Sclerosis Research Australia Postdoctoral Fellowship and a Curtin University Research Fellowship. ED would like to acknowledge the Australian Government Research Training Program Scholarship in supporting this research. GP was supported with funding from the National Health and Medical Research Council Project and Investigator Grants #1099655 and #1173991 and the Research Council of Norway through its Centres of Excellence funding scheme #26270

Prevalence and predictors of vitamin D deficiency in a nationally representative sample of Australian adolescents and young adults

Background/Objectives: Vitamin D deficiency is a public health concern worldwide. Maintaining vitamin D sufficiency during growth periods is essential. We aimed to determine the prevalence and predictors of vitamin D deficiency in Australian adolescents and young adults. Subject/Methods: We used data from adolescents (12–17 years, n = 692) and young adults (18–24 years, n = 400) who participated in the nationally representative 2011–2013 Australian Health Survey. Serum 25-hydroxyvitamin D concentrations were measured using a method certified to international standards, with prevalence reported for 125 nmol/L. Independent predictors of vitamin D deficiency were determined using a survey-weighted Poisson regression model. Results: Overall, 17% of adolescents and 32% of young adults were vitamin D deficient. In models adjusted for sex, age, region of birth, socioeconomic status, BMI and season (and education, smoking status and physical activity in young adults only), the prevalence ratio (PR) for vitamin D deficiency was more than double in participants born outside Australia (adolescents: PR 2.46; 95% confidence interval (CI) = 1.59, 3.81; young adults: PR 2.12; 95% CI = 1.46, 3.07), and also varied by season (adolescents: spring vs summer PR 2.47; 95% CI = 1.22, 5.01 and winter vs summer PR 2.01; 95% CI = 1.03, 3.92; young adults: winter vs summer; PR 3.32; 95% CI = 1.69, 6.53). Other predictors of vitamin D deficiency were overweight compared with healthy weight (adolescents) and lower physical activity (young adults). Conclusions: Strategies based on safe sun exposure and dietary approaches are needed to achieve and maintain adequate vitamin D status, particularly in young adults.RML is supported by an Australian National Health and Medical Research Council Senior Research Fellowship. LJB is supported by a Multiple Sclerosis Research Australia Postdoctoral Fellowship and a Curtin University Research Fellowship. ED would like to acknowledge the Australian Government Research Training Program Scholarship in supporting this research. GP was supported with funding from the National Health and Medical Research Council Project and Investigator Grants #1099655 and #1173991 and the Research Council of Norway through its Centres of Excellence funding scheme #26270