AN ENTOMOLOGICAL STUDY OF THE TRANSFER OF MELATONIN, NICOTINE, AND ZERANOL FROM TISSUE TO MAGGOT

Throughout daily life humans consume substances that are metabolized by the body and eventually secreted. When death occurs metabolism stops and substances are trapped inside the body for a limited amount of time. If the body is left out, eventually flies and other bugs will make their way to it and lay eggs. When the eggs hatch, maggots begin to eat the tissue of the body. Since the tissue contains the consumed substances they should be transferred to the maggots. This is important in forensics because any substances that have dissipated from the tissue of the body may still be found in the maggots. If the maggots are collected they can be analyzed to determine what substances they contain. Knowing what can and cannot be transferred is important, as well as knowledge of how long it will take different substances to dissipate from the body. To imitate dead human tissue, skinned pig muscle was soaked in solutions of melatonin, nicotine, and zeranol (an animal steroid). Maggots were introduced and allowed to feed on the tissue for 72 hours. Samples of maggots were collected every 12 hours, as well as a sample of tissue at the beginning and end of the experiment. All samples were digested in nitric acid. Analysis on the GC-MS of each sample was compared to standards to identify the substances they contained

A Semiclassical Approach to Level Crossing in Supersymmetric Quantum Mechanics

Much use has been made of the techniques of supersymmetric quantum mechanics (SUSY QM) for studying bound-state problems characterized by a superpotential $\phi(x)$. Under the analytic continuation $\phi(x) \to i\phi(x)$, a pair of superpartner bound-state problems is transformed into a two-state level-crossing problem in the continuum. The description of matter-enhanced neutrino flavor oscillations involves a level-crossing problem. We treat this with the techniques of supersymmetric quantum mechanics. For the benefit of those not familiar with neutrino oscillations and their description, enough details are given to make the rest of the paper understandable. Many other level-crossing problems in physics are of exactly the same form. Particular attention is given to the fact that different semiclassical techniques yield different results. The best result is obtained with a uniform approximation that explicitly recognizes the supersymmetric nature of the system.Comment: 15 pages, Latex with lamuphys and psfig macros. Talk by first Author at the UIC "Supersymmetry and Integrable Models Workshop", Chicago, June 12-14, 1997; proceedings to be published in Springer Lecture Notes in Physics, H. Aratyn et al., eds. This paper also available at http://nucth.physics.wisc.edu/preprint

RISK-RETURN ANALYSIS OF INCORPORATING ANNUAL LEGUMES AND LAMB GRAZING WITH DRYLAND CROP ROTATIONS

Profitability and risk, 1988-2001, are examined for lamb-grazed field pea as a fallow alternative with wheat, or an extended wheat-sunflower-millet rotation. Switching from conventional wheat-fallow to an extended rotation with grazed-peas increases profitability (2.3% to 7.3%), and reduces risk (below 0% target in only 2 versus 7 of 14 years).Crop Production/Industries,

Interacting With Providers: An Intersectional Exploration of the Experiences of Carers of Aboriginal Children With a Disability

© The Author(s) 2018. Intersectionality has potential to create new ways to describe disparities and craft meaningful solutions. This study aimed to explore Aboriginal carers’ experiences of interactions with health, social, and education providers in accessing services and support for their child. Carers of Aboriginal children with a disability were recruited from an Australian metropolitan Aboriginal community-controlled health service. In-depth, semistructured interviews were conducted with 19 female carers. Intersectionality was applied as an analytical framework due to the inherent power differentials for Aboriginal Australians and carers for people with a disability. Marginalization and a lack of empowerment were evident in the experiences of interactions with providers due to cultural stereotypes and racism, lack of cultural awareness and sensitivity, and poverty and homelessness. Community-led models of care can help overcome the intersectional effects of these identities and forms of oppression in carers’ interactions with providers and enhance access to care

Experiences and needs of carers of Aboriginal children with a disability: A qualitative study

© 2017 The Author(s). Background: Australian parents/carers of a person with a disability experience higher rates of depression, more financial stress, and are twice as likely to be in poor physical health than the general population. Aboriginal and Torres Strait Islander peoples experience worse health, social and economic outcomes than other Australians, and those with a disability face 'double disadvantage'. This study aimed to better understand the experiences and needs of parents/carers/families of Aboriginal children with a disability. Methods: Semi-structured in-depth interviews were conducted with parents or primary carers of Aboriginal children aged zero-eight with disability. Interviews were analysed using thematic analysis. Results: Nineteen women (sixteen mothers and three grandmothers) were interviewed. More than half were lone carers (without a partner or spouse). Participants described their experiences, including challenges and facilitators, to providing and accessing care, impacts on their health and wellbeing, and associated economic and non-economic costs of caregiving. Financial strain and social isolation was particularly prominent for lone carers. Conclusions: Tailoring services to the needs of carers of Aboriginal children with a disability means supporting kinship caregiving, facilitating engagement with other Aboriginal families, and streamlining services and systems to mitigate costs. The experiences described by our participants depict an intersection of race, socio-economic status, gender, disability, and caregiving. Services and funding initiatives should incorporate such intersecting determinants in planning and delivery of holistic care

Navigating the journey of Aboriginal childhood disability: a qualitative study of carers' interface with services

© 2016 The Author(s) Background: The disadvantage experienced by Aboriginal and Torres Strait Islander children with a disability is well recognized. The long term consequences of failing to address disability on health, education and employment underlies the importance of early intervention. Caregivers experience a disproportionate burden and have challenges accessing services. The aim of this study was to describe the carer journey of accessing support and services. Methods: We conducted in-depth semi-structured interviews with nineteen parents and carers of Aboriginal children aged 0-8 years. The children were patients at a child developmental clinic at a metropolitan area Aboriginal health service in Eastern Australia. Interpretive phenomenological analysis was applied to transcribed verbatim accounts. Results: Four themes were developed using the 'journey' metaphor to describe the carer pathway of accessing support and services at the community, service and policy levels. Themes included 1) the need for increased signage within communities via community education, information and awareness, 2) wrong way signs, roundabouts and roadblocks encountered when accessing services, 3) alternate routes can facilitate the journey, and 4) incompatibility of inflexible bureaucratic road rules and lived realities. Conclusions: The challenges of caring for a child with a disability are indisputable and these can be compounded for people experiencing socio-economic disadvantage and marginalisation. Overcoming challenges to service access faced by carers of Aboriginal children with a disability will require investment in community, services and policy to tailor culturally appropriate models of care

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Time Variability in the X-ray Nebula Powered by Pulsar B1509-58

We use new and archival Chandra and ROSAT data to study the time variability of the X-ray emission from the pulsar wind nebula (PWN) powered by PSR B1509-58 on timescales of one week to twelve years. There is variability in the size, number, and brightness of compact knots appearing within 20" of the pulsar, with at least one knot showing a possible outflow velocity of ~0.6c (assuming a distance to the source of 5.2 kpc). The transient nature of these knots may indicate that they are produced by turbulence in the flows surrounding the pulsar. A previously identified prominent jet extending 12 pc to the southeast of the pulsar increased in brightness by 30% over 9 years; apparent outflow of material along this jet is observed with a velocity of ~0.5c. However, outflow alone cannot account for the changes in the jet on such short timescales. Magnetohydrodynamic sausage or kink instabilities are feasible explanations for the jet variability with timescale of ~1.3-2 years. An arc structure, located 30"-45" north of the pulsar, shows transverse structural variations and appears to have moved inward with a velocity of ~0.03c over three years. The overall structure and brightness of the diffuse PWN exterior to this arc and excluding the jet has remained the same over the twelve year span. The photon indices of the diffuse PWN and possibly the jet steepen with increasing radius, likely indicating synchrotron cooling at X-ray energies.Comment: accepted to ApJ, 14 pages, 8 figure