Interfacial tension measurement of immiscible liq uids using a capillary tube

The interfacial tension of immiscible liquids is an important thermophysical property that is useful in the behavior of liquids both in microgravity (Martinez et al. (1987) and Karri and Mathur (1988)) and in enhanced oil recovery processes under normal gravity (Slattery (1974)). Many techniques are available for its measurement, such as the ring method, drop weight method, spinning drop method, and capillary height method (Adamson (1960) and Miller and Neogi (1985)). Karri and Mathur mention that many of the techniques use equations that contain a density difference term and are inappropriate for equal density liquids. They reported a new method that is suitable for both equal and unequal density liquids. In their method, a capillary tube forms one of the legs of a U-tube. The interfacial tension is related to the heights of the liquids in the cups of the U-tube above the interface in the capillary. Our interest in this area arose from a need to measure small interfacial tension (around 1 mN/m) for a vegetable oil/silicon oil system that was used in a thermocapillary drop migration experiment (Rashidnia and Balasubramaniam (1991)). In our attempts to duplicate the method proposed by Karri and Mathur, we found it quite difficult to anchor the interface inside the capillary tube; small differences of the liquid heights in the cups drove the interface out of the capillary. We present an alternative method using a capillary tube to measure the interfacial tensions of liquids of equal or unequal density. The method is based on the combined capillary rises of both liquids in the tube

Exploring the Space Between Healers: A Narrative Approach to Understanding the Relationship Between Traditional Healers and Biomedical Practitioners in Kwazulu-natal

Despite playing essential and parallel roles in the lives of patients, there exists a frictional, imbalanced relationship between traditional healers and Western doctors in South Africa. While national policy encourages a seamless system rooted in both Western science and indigenous knowledge, biomedical institutions are hesitant to accept traditional medical practices, which are based on less tangible and more spiritually-oriented elements. This research project turns to these two ideologically different entities to assess their perspectives on the roles of themselves and the other within the context of the South African health system. Responses from semi-structured interviews with seven health practitioners from KwaZulu-Natal – izangoma and doctors—were the primary sources used for the knowledge acquisition process. Given that I was the lens through which these participant stories were told, my own narrative and perspectives on the subject were interwoven throughout this report. Participant narratives suggest that there is no consensus within either biomedical or traditional health domains about perceptions of the other, save for the agreement that the South African health system is disconnected with both modalities working in parallel. However, there are five overarching points of engagement throughout the practitioner-patient healing process through which the modalities directly or indirectly interact with one another and form cross-disciplinary opinions. These serve as points of discussion in this report. Elements keeping the domains separated include miscommunication, suspicion, and adherence to cultural paradigms. However, doctors and traditional healers alike expressed varying degrees of interest in facilitating a working a working relationship, since the South African public healthcare system relies extensively on both domains of healing. These findings have reinforced my personal sentiments about the importance of medical pluralism in systems operating under two distinct healing paradigms

Sophomore Recital:Brittany DelSignore, Clarinet

Kemp Recital Hall Saturday Afternoon March 24, 2007 3:30p.m

Senior Recital: Brittany Rose DelSignore, Clarinet; Momoko Gresham, Piano; November 6, 2009

Kemp Recital HallNovember 6, 2009Friday Evening7:00 p.m

Neuroimaging in social anxiety disorder—a meta-analytic review resulting in a new neurofunctional model.

Social anxiety disorder (SAD) is one of the most frequent anxiety disorders. The landmark meta-analysis of functional neuroimaging studies by Etkin and Wager (2007) revealed primarily the typical fear circuit as overactive in SAD. Since then, new methodological developments such as functional connectivity and more standardized structural analyses of grey and white matter have been developed. We provide a comprehensive update and a meta-analysis of neuroimaging studies in SAD since 2007 and present a new model of the neurobiology of SAD. We confirmed the hyperactivation of the fear circuit (amygdala, insula, anterior cingulate and prefrontal cortex) in SAD. In addition, task-related functional studies revealed hyperactivation of medial parietal and occipital regions (posterior cingulate, precuneus, cuneus) in SAD and a reduced connectivity between parietal and limbic and executive network regions. Based on the result of this meta-analysis and review, we present an updated model of SAD adopting a network-based perspective. The disconnection of the medial parietal hub in SAD extends current frameworks for future research in anxiety disorders.This is the author's accepted manuscript. The final version is printed by Elsevier in Neuroscience & Biobehavioral Reviews here: http://www.sciencedirect.com/science/article/pii/S0149763414002012

Comorbidity of Asperger syndrome and gender identity disorder

The case of a 35-yearold biological woman with Asperger syndrome (AS) and gender identity disorder (GID) fulfilling DSM-IV criteria is reported. Against the background of recently emerging theories of cognitive male pattern underlying autism we present additional psychological assessments in order to discuss any possible interaction or discrimination between AS and GID. Whilst we explain GID as a secondary feature of AS, we examine the assumption of the necessity of treating GID in AS as a primary GID in accordance with international standards. We consider the treatment of GID as compelling, particularly because curative therapy for AS is lacking and with GID treatment in this vein, the patient gains psychosocial improvemen

Finger Length Ratio (2D:4D) in Adults with Gender Identity Disorder

From early childhood, gender identity and the 2nd to 4th finger length ratio (2D:4D) are discriminative characteristics between sexes. Both the human brain and 2D:4D may be influenced by prenatal testosterone levels. This calls for an examination of 2D:4D in patients with gender identity disorder (GID) to study the possible influence of prenatal testosterone on gender identity. Until now, the only study carried out on this issue suggests lower prenatal testosterone levels in right-handed male-to-female GID patients (MtF). We compared 2D:4D of 56 GID patients (39MtF; 17 female-to-male GID patients, FtM) with data from a control sample of 176 men and 190 women. Bivariate group comparisons showed that right hand 2D:4D in MtF was significantly higher (feminized) than in male controls, but similar to female controls. The comparison of 2D:4D ratios of biological women revealed significantly higher (feminized) values for right hands of right handed FtM. Analysis of variance confirmed significant effects for sex and for gender identity on 2D:4D ratios but not for sexual orientation or for the interaction among variables. Our results indirectly point to the possibility of a weak influence of reduced prenatal testosterone as an etiological factor in the multifactorially influenced development of MtF GID. The development of FtM GID seems even more unlikely to be notably influenced by prenatal testosteron