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  • 2000-2004  (149)
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  • 1
    Unknown
    Champaign, Ill : Project Gutenberg
    Keywords: Russia, Description and travel.
    ISBN: 0-585-01713-1
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  • 2
    Unknown
    Raleigh, N.C : Alex Catalogue
    Keywords: Jesus Christ, Fiction.
    ISBN: 0-585-05262-X
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  • 3
    Unknown
    New York : Oxford University Press
    Keywords: Wesley, Susanna Annesley,, 1669-1742. ; Wesley, Susanna Annesley,, 1670-1742. ; Anglicans, England, Biography.
    Pages: xiv, 504 p.
    ISBN: 0-585-24572-X
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  • 4
    ISSN: 1432-2161
    Keywords: Keywords Arthroplasty ; Wear ; Fluoroscopy ; Implant loosening
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Objective. Wear of the polyethylene insert is a well-recognised cause of implant failure in total knee replacements. The purpose of this study was to evaluate a simple, digital fluoroscopic technique for the assessment of wear in knee prostheses. Design.Fluoroscopic images of knee prostheses were produced both of a phantom and in a patient group. Joint space thickness was measured by reference to a known diameter. Measurements were made to assess repeatability of positioning, inter- and intra-observer variance and the effect of angulation. Results. Standard phantom images showed small variation between measurements, high inter-reader correlation (Pearson’s correlation coefficient, r=0.98, P〈0.001; coefficient of variation=0.53%) and low intra-reader variation (coefficient of variation=0.57%). Inter- and intra-imager variation were low (coefficient of variation=1.05% and 0.88%, respectively). In the patient group, the range of joint space measurements was 1.9–8.9 mm. The coefficient of variation in insert measurements on repeated images was 2.0%. Repeatability of measurements was 0.2 mm with 99% confidence interval. Conclusions. This technique allows repeatable, precise measurement of insert thickness. The technique may be adapted to any implant where a reliable calibrating distance is present.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Human neural precursor cells grown in culture provide a source of tissue for drug screening, developmental studies and cell therapy. However, mechanisms underlying their growth and differentiation are poorly understood. We show that epidermal growth factor (EGF) responsive precursors derived from the developing human cortex undergo senescence after 30–40 population doublings. Leukemia inhibitory factor (LIF) increased overall expansion rates, prevented senescence and allowed the growth of a long-term self renewing neural stem cell (ltNSCctx) for up to 110 population doublings. We established basal gene expression in ltNSCctx using Affymetrix oligonucleotide microarrays that delineated specific members of important growth factor and signaling families consistently expressed across three separate lines. Following LIF withdrawal, 200 genes showed significant decreases. Protein analysis confirmed LIF-regulated expression of glial fibrillary acidic protein, CD44, and major histocompatibility complex I. This study provides the first molecular profile of human ltNSCctx cultures capable of long-term self renewal, and reveals specific sets of genes that are directly or indirectly regulated by LIF.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The effects of transient cerebral ischemia on phosphorylation of the NR1 subunit of the NMDA receptor by protein kinase C (PKC) and protein kinase A (PKA) were investigated. Adult rats received 15 min of cerebral ischemia followed by various times of recovery. Phosphorylation was examined by immunoblotting hippocampal homogenates with antibodies that recognized NR1 phosphorylated on the PKC phosphorylation sites Ser890 and Ser896, the PKA phosphorylation site Ser897, or dually phosphorylated on Ser896 and Ser897. The phosphorylation of all sites examined increased following ischemia. The increase in phosphorylation by PKC was greater than by PKA. The ischemia-induced increase in phosphorylation was predominantly associated with the population of NR1 that was insoluble in 1% deoxycholate. Enhanced phosphorylation of NR1 by PKC and PKA may contribute to alterations in NMDA receptor function in the postischemic brain.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: The postsynaptic density (PSD) is a cytoskeletal specialization involved in the anchoring of neurotransmitter receptors and in regulating the response of postsynaptic neurons to synaptic stimulation. The postsynaptic protein PSD-95 binds to NMDA receptor subunits NR2A and NR2B and to signaling molecules such as neuronal nitric oxide synthase and p135synGAP. We investigated the effects of transient cerebral ischemia on protein interactions involving PSD-95 and the NMDA receptor in the rat hippocampus. Ischemia followed by reperfusion resulted in a decrease in the solubility of the NMDA receptor and PSD-95 in 1% sodium deoxycholate, the decrease being greater in the vulnerable CA1 hippocampal subfield than in the less sensitive CA3/dentate gyrus regions. Solubilization of the kainic acid receptor GluR6/7 and the PSD-95 binding proteins, neuronal nitric oxide synthase and p135synGAP, also decreased following ischemia. The association between PSD-95 and NR2A and NR2B, as indicated by coimmunoprecipitation, was less in postischemic samples than in sham-operated controls. Ischemia also resulted in a decrease in the size of protein complexes containing PSD-95, but had only a small effect on the size distribution of complexes containing the NMDA receptor. The results indicate that molecular interactions involving PSD-95 and the NMDA receptor are modified by an ischemic challenge.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1460-9568
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Dead reckoning, a form of navigation used to locate a present position and to return to a starting position, is used by rats to return to their home base. The present experiment examined whether dead reckoning is displayed by rats during their first exploratory excursions in a novel environment and also examined whether the behaviour requires the integrity of the cells of the hippocampus. Experimental rats, those with NMDA (N-methly d-aspartate) lesions of Ammon's horn and the dentate gyrus, and control rats could leave a cage to explore a large circular table under light and dark conditions. Home base behaviour, use of olfactory cues, and thigmotaxic- based navigation were evaluated. Temporal, topographical and kinematic analyses were conducted on the first three exploratory excursions that extended at least halfway across the table. Groups did not differ in numbers of exits from the home base, lingering near the home base, distance travelled, or the use of surface cues as might be exemplified by thigmotaxic and olfactory behaviour. Temporal, topographical and kinematic reconstructions of homing behaviour, however, indicated that control rats, but not hippocampal rats, made direct high velocity return trips to the home base in both the light and the dark. Peak velocity of the trips occurred at the trip midpoint, independent of trip distance, suggesting the movements were preplanned. These results are discussed in relation to the ideas that dead reckoning is used in the homing of exploring rats and that this form of navigation involves the hippocampus.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1360-0443
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Notes: Aims  To describe injection drug use among inmates, and to identify correlates of drug injection while incarcerated.Design  Cross-sectional survey.Setting  Six provincial correctional centres in Ontario, Canada.Participants  Face-to-face interviews were conducted with a random sample of 439 adult males and 158 females.Measurements  Inmates were asked about drug use in their lifetime, outside the year prior to their current incarceration, and while incarcerated in the past year. Among the 32% (189 / 597) with a prior history of drug injection, independent correlates of injection while incarcerated in the past year were identified using multiple logistic regression.Findings  Among all inmates while incarcerated in the past year, 45% (269 /597) used drugs and 19% (113 / 596) used non-cannabis drugs. Among those with a prior history of injecting, 11% (20 / 189) injected while incarcerated in the past year. Rates of injection with used needles were the same pre-incarceration as they were while incarcerated (32%). Independent correlates of drug injection while incarcerated were injection of heroin (OR = 6.4) or other opiates (OR = 7.9) and not injected with used needles (OR = 0.20) outside in the year prior to incarceration, and ever being incarcerated in a federal prison (OR = 5.3).Conclusions  The possibility of transmission of human immunodeficiency virus (HIV), hepatitis C (HCV) or other blood-borne diseases exists in Ontario correctional centres. In this setting, drug injection while incarcerated is primarily related to opiate use prior to incarceration. The correlation between injecting and extensive incarceration history suggests missed opportunities to improve inmates’ health.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1365-2524
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The concepts of empowerment and advocacy, and how they impinge on power relationships for service providers working with black and Asian communities, are explored through the findings of a 20-month project carried out between 2000 and 2001 with 19 Pakistani and Bangladeshi families who have children with severe disabilities in Birmingham. This action research project evaluated an advocacy project designed to improve the quality of life for Pakistani and Bangladeshi families with at least one child with severe disabilities. The objectives included improving access to resources, services, information and support in ways which were non-stigmatising, and which were sensitive to the particular needs of the children and their carers. The present paper discusses four main themes: (1) advocacy and empowerment in practice; (2) issues of the efficacy of advocacy and of consultation within advocacy; (3) individual empowerment versus the families’ needs; and (4) cultural and gender issues which emerged from the analysis of the study. The authors identify features of empowerment which must be addressed in advocacy services which are sensitive to ethnic differences. These issues must be addressed if services are to reap their potential to make a positive impact on the lives of the most vulnerable and powerless members of the community.
    Type of Medium: Electronic Resource
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