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  • 1
    ISSN: 1524-4741
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract:  There are many conflicting results in the literature comparing quality of life following breast-conserving therapy (BCT) and mastectomy. This study compared long-term quality of life between breast cancer patients treated by BCT or mastectomy in three age groups. Patients (n = 990) completed a quality of life survey, including the European Organization for Research and Treatment of Cancer Quality of Life Core Questionnaire (EORTC QLQ-C30), at regular intervals over 5 years. In the cross-sectional data, mastectomy patients had significantly (p 〈 0.01) lower body image, role, and sexual functioning scores and their lives were more disrupted than BCT patients. Emotional and social functioning and financial and future health worries were significantly (p 〈 0.01) worse for younger patients. There were no differences in body image and lifestyle scores between age groups. There was also no interaction between age and surgery method. Even patients ≥70 years of age reported higher body image and lifestyle scores when treated with BCT. The repeated measures analysis indicated that four functioning scores, half the symptom scores, future health, and global quality of life improved significantly (p 〈 0.01) over time. All these variables increased significantly for BCT patients and those 50 to 69 years of age. Body image, sexual functioning, and lifestyle disruption scores did not improve over time. BCT should be encouraged in all age groups. Coping with appearance change should be addressed in patient interventions.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1540-8183
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background: Elective coronary stenting has hem shown to reduce the rate of recurrent stenoses after angioplasty but no firm data are available on its possible association with in-hospital ischemic complications. Methods: We analyzed the data of the registry of the German community hospitals covering approximately one quarter of all interventions in Germany. We included all angioplasty procedures performed in patients with stable coronary artery disease in 1996. Interventions with elective coronary stenting were compared to those with conventional balloon angioplasty. Interventions with bailout stenting were excluded. Results: Of 19,170 angioplasty procedures, 32.2% included elective coronary stenting. The immediate angiographic success rate (residual stenosis 〈 50%) was 90.6% of the procedures with stents versus 86.3% of those without stents (P 〈 0.001). The overall incidence of complications (death, myocardial infarction, bypass surgery, vessel closure, reintervention) was 3.9% and 3.8% (NS). Major events (death, myocardial infarction, bypass surgery) were more common in the stent-treated group (1.8% vs 1.4%, P = 0.027). In multivariate analysis, the following factors were significantly associated with complications: residual stenosis ≥ 50%, female gender, angioplasty of proximal left anterior descending coronary artery, morphological fype of lesion B2 or C, and multivessel disease. Angioplasty of restenoses after previous angioplasty was associated with significantly less risk than of de novo lesions. Stents were neutral with respect to the overall incidence of complications. Conclusions: Complications after elective coronary angioplasty remain largely unpredictable in individual patients despite the identification of several clinical and procedural risk factors. Elective coronary stenting is not associated with the immediate therapeutic risk of angioplasty in stable coronary artery disease.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    350 Main Street , Malden , MA 02148-5020 , USA and 9600 Garsington Road , Oxford OX4 2XG , England . : Blackwell Science Inc
    Journal of cardiac surgery 19 (2004), S. 0 
    ISSN: 1540-8191
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract  Objective: To assess if coronary artery bypass grafting (CABG) patients with dialysis-dependent end stage renal disease (ESRD) experience greater intraoperative and postoperative morbidity and mortality compared to CABG patients without ESRD. Methods: We conducted a nested case–control study from an 8-year hospitalization cohort in which data were collected prospectively. Inclusion criteria included CABG surgery and age greater than 18 years. Cases were patients with dialysis dependent ESRD (N = 28) and controls were patients without ESRD (N = 84). Cases were matched to controls 1:3 on age, gender, tobacco history, and New York Heart Association Functional Class. The outcomes of interest were mortality, intensive care unit length of stay, total length of hospitalization, time on the ventilator, wound complications, pulmonary complications, neurological complications, gastrointestinal complications, arrhythmia, and intraoperative complications. Using logistic regression we controlled for 13 potential confounding variables. Results: There were no significant differences between the groups with the exception of total length of hospitalization. Patients with dialysis-dependent ESRD had a significantly longer total hospitalization stay (21%) than patients without ESRD. There were no significant differences for the remaining nine outcomes of interest, including perioperative morbidity or mortality. Conclusion: Intraoperative and postoperative morbidity and mortality for CABG were not increased for patients with dialysis-dependent ESRD compared to patients without ESRD. However, patients on dialysis undergoing CABG experienced a greater length of hospitalization than patients undergoing CABG who were not on dialysis.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford UK : Blackwell Science Ltd.
    Journal of neurochemistry 75 (2000), S. 0 
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract : Several studies indicate that cell adhesion molecules have to be clustered on the cell surface to engage in adhesive functions. We investigated adhesive functions of clustered versus monomeric L1 extracellular parts in vitro to distinguish how clustering affects ligand binding and promotion of neurite outgrowth. Trimeric L1 was recombinantly expressed and covalently assembled by the cartilage matrix protein's coiled-coil domain. Trimeric L1 has an apparent molecular mass of ~380 kDa in the nonreduced form and ~130 kDa in the reduced form. Rotary shadowing electron micrographs of trimeric L1 revealed a rod-like shape terminating in three globular domains. Monomeric L1 assumes a horseshoe shape of domains Ig I-IV followed by a rod-like structure consisting of Ig V and VI and fibronectin type III 1-5. Circular dichroism measurements showed that the secondary structure consists of β-sheets. Trimeric L1 binds to itself, to monomeric L1, to laminin-1, and to α5β1 integrin in a concentration-dependent manner. In contrast, binding of monomeric L1 could only be saturated with itself but not with laminin-1 and with α5β1 integrin. Promotion of neurite outgrowth from PC12 cells cultured on adsorbed trimeric L1 was increased by 100%, whereas on monomeric L1 the increase was only 50% over the control value. Promotion of neurite outgrowth from PC12 cells was specifically inhibited in a concentration-dependent manner by a polyclonal antibody against L1. These findings show that clustering of only three extracellular domains increases considerably L1's binding affinity to different ligands and enhances neurite outgrowth, suggesting that adhesive functions of L1 on the cell surface depend on cluster formation.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1469-8986
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Notes: Accurate and early diagnosis of Alzheimer's Disease (AD) with reliable and noninvasive methods is of great importance for clinical practice as effective and specific antidementive therapies become available. The aim of the study was to evaluate the clinical relevance of event-related P300 in the early diagnosis of AD. Thirty patients with AD, 26 patients with mild cognitive impairment (MCI) from our Memory Clinic and 26 age-matched healthy controls (HC) were studied with event-related P300 potentials. Amplitudes of temporo-basal dipoles (TB-P300) were significantly diminished in AD compared to HC and MCI. Furthermore, latencies of temporo-superior dipoles (TS-P300) were significantly prolonged in AD compared with HC. Sensitivity was 90.0% for the differentiation of patients with AD from HC (specificity 79.1%) using reduced TB-P300 amplitudes and prolonged TS-P300 latencies. Similar results were found using Pz amplitudes as well as Fz latencies. Our data suggest that TB-P300 amplitudes and TS-P300 latencies may be an accurate clinically available, nonexpensive, noninvasive, and reliable marker for AD.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 79 (2001), S. 2193-2195 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We measure microwave frequency (4–40 GHz) photoresistance at low magnetic field B, in high mobility two-dimensional electron gas samples, excited by signals applied to a transmission line fabricated on the sample surface. Oscillatory photoresistance vs B is observed. For excitation at the cyclotron resonance frequency, we find a giant relative photoresistance ΔR/R of up to 250%. The photoresistance is apparently proportional to the square root of applied power, and disappears as the temperature is increased. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Cross-sectional scanning tunneling microscopy was used to identify individual Al atoms on cleaved surfaces of two sets of (AlGa)As heterostructure samples grown with metalorganic vapor-phase epitaxy and molecular-beam epitaxy. We determined the average Al concentration profile perpendicular to the GaAs–(AlGa)As interfaces. Based on former investigations of short-range ordering in (AlGa)As bulk material grown with metalorganic vapor-phase epitaxy, we conclude that short-range ordering during growth of the interfacial layers contributes significantly to the observed interface roughness. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 80 (2002), S. 2335-2337 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have measured thermally activated magnetization reversal of the free layers in submicron magnetic tunnel junctions to be used for magnetoresistive random access memory. We applied magnetic field pulses to the bits with a pulse duration tp ranging from nanoseconds to 0.1 ms. We have measured the switching probability as a function of tp with a fixed field amplitude H, and as a function of H for fixed tp. For both cases, we find good agreement with the switching probability predicted by the Arrhenius–Néel theory for thermal activation over a single energy barrier. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    New blackfriars 82 (2001), S. 0 
    ISSN: 1741-2005
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Theology and Religious Studies
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: An extracellular serine peptidase, purified from the culture supernatant of the sub-Arctic psychrophilic bacterium strain PA-43, is monomeric, with a relative molecular mass of 76 000, and an unusually low pI of 3.8. The peptidase is active towards N-succinyl AAPF p-nitroanilide and N-succinyl AAPL p-nitroanilide, indicating a chymotrypsin-like substrate specificity. It is inhibited by the serine peptidase inactivator phenylmethylsulfonyl fluoride, but not by EDTA or EGTA, suggesting that added metal ions are not necessary for activity. The enzyme is most active at pH 8.3 and at 55–60°C, although it is unstable at 60°C. It is nevertheless remarkably stable for an enzyme from a psychrophilic microorganism, remaining active after 1 week at 20°C and after five freeze–thaw cycles. Comparison of the N-terminal 40 amino acid residues with other archived sequences revealed highest similarity to the alkaline serine protease (aprx) from Bacillus subtilis.
    Type of Medium: Electronic Resource
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