4 resultados para Penrose limit and pp-wave background
em Worcester Research and Publications - Worcester Research and Publications - UK
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In Sudanese women with (n = 60) and without (n = 65) pre-eclampsia, circulating lipids, plasma and red cell saturated and monounsaturated fatty (MUFA) acids and dimethyl acetals (DMAs) were investigated. DMAs are an indirect marker of levels of plasmalogens, endogenous antioxidants, which play a critical role in oxidative protection, and cholesterol homeostasis. The pre-eclamptics had higher C18:1n-9 (p < 0.001) and ΣMUFA (p < 0.01) in plasma free fatty acids, C16:1n-7, C18:1n-9, ΣMUFA; 16:0/16:1n-7 (p < 0.01) in erythrocyte choline phosphoglycerides (ePC) and 16:1n-7, 18:1n-7 and 16:0/16:1n-7 (p < 0.01) in erythrocyte ethanolamine phosphoglycerides (ePE). In contrast, the DMAs 18:0, 18:1 and ΣDMAs in ePE, and 16:0, 18:0 and ΣDMAs in ePC were reduced (p < 0.001) in the pre-eclamptic women. This study of pregnant women with high carbohydrate and low fat background diet suggests pre-eclampsia is associated with oxidative stress and enhanced activity of the microsomal enzyme stearyl-CoA desaturase (delta 9 desaturase), as assessed by palmitic/palmitoleic (C16:0/C16:n-1) and stearic/oleic (C18/C18:1n-9) ratios.
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Aims and objectives The aim of this qualitative evidence synthesis was to explore the experiences and perceptions of health care staff caring for people with dementia in the acute setting. This paper focuses on the methodological process of conducting framework synthesis using NVivo for each stage of the review: screening, data extraction, synthesis and critical appraisal. Background Qualitative evidence synthesis brings together many research findings in a meaningful way that can be used to guide practice and policy development. For this purpose, synthesis must be conducted in a comprehensive and rigorous way. There has been previous discussion on how using NVivo can assist in enhancing and illustrate the rigorous processes involved. Design Qualitative Framework Synthesis. Methods Twelve documents, or research reports, based on nine studies, were included for synthesis. Conclusion The benefits of using NVivo are outlined in terms of facilitating teams of researchers to systematically and rigorously synthesise findings. NVivo functions were used to conduct a sensitivity analysis. Some valuable lessons were learned and these are presented to assist and guide researchers who wish to use similar methods in future.
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Background and Aims To examine whether a history of mood episodes triggered by sleep loss is associated with (1) postpartum psychosis (PP) and (2) more broadly-defined postpartum mood episodes that included postnatal depression (PND), in women with bipolar disorder (BD). Methods Participants were 622 parous women with a diagnosis of bipolar-I disorder recruited in the UK to the Bipolar Disorder Research Network. Diagnosis and perinatal episodes were assessed via interview and case note data. Women were also asked during the interview whether episodes of mania and/or depression were triggered by sleep loss. We compared the rates of PP and PND within women who did and did not endorse sleep loss as a trigger of mood episodes. Results Women who reported that their episodes of mania were usually triggered by sleep loss were twice as likely to have experienced an episode of PP (OR = 2.00, 95% CI = 1.20–3.36) than women who did not report this. This effect remained significant when controlling for clinical and demographic factors. We found no significant associations between depression triggered by sleep loss and PP. Analyses in which we defined postpartum episodes at a broader level to include both PP and PND were not significant. Conclusions In pregnant women with BD, a history of mania following sleep loss could be a potential marker of vulnerability to severe postpartum episodes. Further study in prospective samples is required in order to confirm these findings, which may have important implications for understanding the aetiology of PP and of mood disorders more generally.
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Aim and Objective In this qualitative study we explored women’s pregnancy intentions and experiences of intimate partner violence before, during and after pregnancy. Background Unintended pregnancies in the context of intimate partner violence can have serious health, social and economic consequences for women and their children. Design Feminist and phenomenological philosophies underpinned the study to gain a richer understanding of women’s experiences. Methods Eleven women who had been pregnant in the previous two years were recruited from community-based women’s refuges in one region of the United Kingdom. Of the eleven women, eight had unplanned pregnancies, two reported being coerced into early motherhood, and only one woman had purposively planned her pregnancy. Multiple in-depth interviews focused on participants’ accounts of living with intimate partner violence. Experiential data analysis was used to identify, analyse and highlight themes. Results Three major themes were identified: men’s control of contraception, partner’s indiscriminate response to the pregnancy, and women’s mixed feelings about the pregnancy. Participants reported limited influence over their sexual relationship and Accepted Article This article is protected by copyright. All rights reserved. birth control. Feelings of vulnerability about themselves and fear for their unborn babies’ safety were intensified by their partners’ continued violence during pregnancy. Conclusion Women experiencing intimate partner violence were more likely to have an unintended pregnancy. This could be attributed to male dominance and fear, which impacts on a woman’s ability to manage her birth control options. The women’s initial excitement about their pregnancy diminished in the face of uncertainty and ongoing violence within their relationship. Relevance to clinical practice Women experiencing violence lack choice in relation to birth control options leading to unintended pregnancies. Interpreting the findings from the victim-perpetrator interactive spin theory of intimate partner violence provides a possible framework for midwives and nurses to better understand and respond to women’s experiences of violence during pregnancy.