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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 71 (1988), S. 429-436 
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The magnetostriction (MS) of REBa2Cu3O7−δ (RE=Y, Nd, Eu, Gd, Ho, Er, Yb) is reported as a function of magnetic field and temperature forH〈5 T and 1.5〈T〈40 K. With nonmagnetic rare earths the MS is small and a linear function of the field atH〉1 T. The MS is much larger when the rare earth carries a magnetic moment, as usual, but the volume MS observed with moment carrying REBa2Cu3O7−δ is larger than that of nonsuperconducting intermetalics. This effect is explained by the shielding currents which are induced by the 4f magnetic moments in the superconducting CuO-lattice. The thermal expansion of GdBa2Cu3O7−δ shows a large peak at the ordering temperature of 2.2 K in both the superconducting and the nonsuperconducting samples.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Inorganic chemistry 24 (1985), S. 4020-4023 
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of agricultural and food chemistry 37 (1989), S. 410-412 
    ISSN: 1520-5118
    Source: ACS Legacy Archives
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1440
    Keywords: Bone marrow transplantation ; Anti-CMV hypergammaglobulin ; Azyklovir ; Conditioning
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Bone marrow transplantation was performed between IV/82 and X/85 in 64 patients with acute leukemia (n=36), chronic myelogenous leukemia (CML;n=13), severe aplastic anemia (n=12), and neuroblastoma stage IV (n=3). Of these patients 57 received allogeneic marrow from HLA-ABCDR identical, MLC-negative sibling donors. Six transplants were performed with syngenic marrow and one with autologous marrow. Of the 64 patients 48 survived 40-1,250 days after transplantation, resulting in a survival rate (SR) of 75% and a survival probability (SP) of 71%. Of the 36 patients suffering from acute leukemia (SR=64%, SP=51%), patients with acute myelogenous leukemia (AML) in first complete remission (n=11; SR=81%, SP=76%), as well as patients with acute lymphatic leukemia (ALL) in 1st to 4th complete remission at the time of transplantation (n=14; SR=81%, SP=76%) show a favorable prognosis. A poor survival rate was seen for patients with AML when transplanted in second or partial remission (1/5; SR=20%), as well as for patients suffering from ALL and transplanted during relapse or partial remission (1/6; SR=16%). Of 13 patients suffering from CML 12 survived the transplantation free of relapse (SR=93%, SP=92%), and one patient died from varicella zoster pneumonia. Of the transplanted patients with severe aplastic anemia, 12 of 13 are surviving with complete hematologic reconstitution; one patient, however, died on day 10 from a sepsis. In our patient group, the SR as well as the SP has been improved through changes in the irradiation protocol concomitant with prophylactic application of anti-CMV hypergammaglobulin, as well as through additional oral medication of Azyklovir. The 41 patients (BMT No. 7–47) with total body irradiation at one time-show an SR of 44% and an SP of 41%. The following 46 patients (BMT No. 48–93) have reached an SR of 83% and an SP of 74% under the regimen of fractionated total body irradiation, plus prophylaxis with anti-CMV hypergammaglobulin and Azyklovir. Within this group, no fatal CMV pneumonia was encountered as opposed to six patients lost from CMV pneumonia in the first group.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-1440
    Keywords: Acyclovir, bioavailability ; Drug monitoring ; Bone marrow transplantation ; Herpes infections, prevention and control
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Viral infections are one of the major complications after bone marrow transplantation, with high mortality and morbidity. Fourty-six patients between 3 and 48 years old (median 15 years) received orally 400 mg (under age 6, 200 mg) acyclovir 4 times daily from day −12 before to day 84 after BMT. All patients were isolated in laminar-airflow units for at least 23 days with total enteral decontamination. They were concomitantly treated with anti-CMV-hyperimmunoglobulin and cotrimoxazol. During acyclovir prophylaxis seven patients had herpes simplex virus infections, all of them were seropositive before BMT. Acyclovir plasma concentrations were measured by use of a new HPLC method. No acyclovir was present (detection limit 40 ng/ml) in the plasma of five out of six patients with HSV infections. Three of them had non-compliance, and a lack of acyclovir absorption developed in two patients under conditioning regimen. No drug-related side effects were observed. Laboratory tests did not show liver or renal toxicity. Take and hematologic reconstitution were unchanged. In our study, oral acyclovir reduced the incidence of herpes simplex infections after bone marrow transplantation. Herpes infections only occurred in patients with non-compliance or lack of acyclovir absorption.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 64 (1986), S. 1036-1040 
    ISSN: 1432-1440
    Keywords: Sinlge cell assay, modified ; Natural killer cells ; Interferon
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Even though the enhancement of the lyitc capacity and the kinetics of lysis of natural killer cells (NK) by interferon has been well documented, an increase of the target-effector cell binding percentage is still disputed. We, therefore, modified the Grimm-Bonavida single-cell assay so that 400 to 600 cells per individual determination could be reliably evaluated. Using this assay, which makes possible separate determination of effector-target cell binding and target lysis, we demonstrated that, in addition to lytic capacity, target-effector cell binding is also increased by preincubating NK with 100 to 1,000 IU interferon alpha 2 per 106 cells. Our data indicate that interferon alpha 2 induces pre-NK cells to bind target cells and that it activates these pre-NK cells to kill the targets.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-1440
    Keywords: Bone marrow transplantation ; Natural killer cells ; Interferon ; Cycloporin A ; Graft-versus-host disease ; Methotrexate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Twenty-one patients with acute and chronic leukemia or severe aplastic anemia were studied for NK activity against a thymoma cell line (Thy 121) before and after allogeneic bone marrow transplantation. The means of the pretransplant and post-transplant levels did not differ from the mean of 134 NK determinations in 67 healthy donors. There was no correlation between pretransplant NK levels and the appearance of graft-versus-host disease. Three weeks following bone marrow transplantation, pretransplant NK levels were observed. The sensitivity of NK cells to interferon was the same as in normal donors both before and after bone marrow transplantation. In contrast to methotrexate, cyclosporin A inhibited NK activity in patients and controls in vitro. In vivo cyclosporin A treatment, however, did not decrease NK levels in bone marrow recipients.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1432-1440
    Keywords: Whipple's disease ; Electron microscopy ; Disturbed cellular immunology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Whipple's disease is a curious disorder with the involvement of many organ systems, primarily gut, synovium and the central nervous system, characterized by the presence of numerous proliferating bacteria in tissue macrophages and other cell types. While clinically this disease entity has previously been defined by the classical triad of diarrhoea, malabsorption and weight loss, some patients do not show these features. In this report, a clinically unusual case of Whipple's disease is described presenting with high persistent fever, severe arthralgias and headaches, but without malabsorption, diarrhoea or weight loss. Nevertheless, the histological and electron microscopical pictures demonstrated the typical findings of intracellular micro-organisms along with the presence of bacteria in Schwann nerve cells, which has only once been described previously. Immunological findings before treatment demonstrated a decrease of T cells with the helper/inducer phenotype, and a concomitant rise in cells with the suppressor/cytotoxic phenotype, an elevation of “activated” Ia positive T cells and a significant reduction of T cell mitogenic responsiveness. Of special interest, after a successful treatment these immunological abnormalities shifted to normal with the exception of a still elevated number of Ia+ T cells. The discussion of this unusual case of Whipple's disease includes — besides possible cellular immunological abnormalities — genetic factors, especially since this patient was HLA-B-27-positive as was his son who is suffering from ankylosing spondylitis.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 67 (1989), S. 297-303 
    ISSN: 1432-1440
    Keywords: Osteocalcin ; Renal transplantation ; Secondary hyperparathyroidism ; Steroid induced bone disease
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Osteocalcin serum levels reflect bone turnover. In renal insufficiency secondary hyperparathyroidism and reduced renal clearance might be responsible for elevated serum levels of osteocalcin. Renal transplantation might improve renal osteodystrophy and therefore could influence osteocalcin serum levels. We determined the influence of renal transplantation on osteocalcin levels in 37 consecutive patients (25m/12f) by RIA. Blood samples were collected prior to, 3 days, 28 days, 6 months and 12 months after renal transplantation. Prior to renal transplantation osteocalcin levels were significantly elevated (x±s: 23.4±12.8 ng/ml) compared to healthy volunteers (4.1±1.4 ng/ml). Following renal transplantation osteocalcin decreased significantly (9.4±8.9 ng/ml) 3 days and (7.1±7.8 ng/ml) 28 days. However, 6 and 12 months following renal transplantation the mean osteocalcin level increased again (8.3±5.7 ng/ml, 12.1±15.4 ng/ml). At 6 months 11 and at 12 months only 6 of 37 patients had osteocalcin levels in the normal range. 12 months following renal transplantation 21 out of 37 patients with elevated osteocalcin levels had parathyroid hormone levels above the normal range. Additionally to increased osteocalcin levels patients prior to renal transplantation had elevated alkaline phosphatase. Alkaline phosphatase had following renal transplantation a similar pattern as osteocalcin with initial decrease and secondary increase 6 and 12 months after renal transplantation. Parathyroid hormone was elevated in all patients before renal transplantation. Following renal transplantation mean parathyroid hormone levels fell significantly, however remained above normal range in 57% of these 37 patients. Osteocalcin serum levels correlated positively with alkaline phosphatase (rs=0.43−0.62;p〈0.011) and parathyroid hormone (0.3−0.66p〈0.07). This correlation of osteocalcin with alkaline phosphatase and parathyroid hormone prior to and after renal transplantation suggests that osteocalcin may be a confirmative parameter in renal osteodystrophy in patients on chronic intermittent hemodialysis and following renal transplantation.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    The journal of membrane biology 112 (1989), S. 185-192 
    ISSN: 1432-1424
    Keywords: slow fiber ; K contracture ; D600 ; divalent cations ; competitive binding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Summary Single, slow muscle fibers fromRana temporaria were equilibrated in normal Ringer's. 95 mmol/liter K1-solution containing various concentrations of Ca2+, Ni2+, Mn2 or Mg2+ was applied, and the ensuing contractures were recorded isometrically. While peak tension (F max) was little affected, maintained tension (measured 1 min after onset of contracture) strongly depended on the concentration and species of divalent cations. Tension was maintained at its peak value in the presence of all species of divalent cations provided their concentrations were adequately increased. Dose-response curves were hyperbolic: Lineweaver-Burk plots revealed straight lines with different slopes intersecting near 1/F max, and indicating the following order of efficiency: Ni2+〉Ca2+〉Mn2+〉〉Mg2+. Hill plots for these cations resulted in straight lines with slopes near 1. Qualitatively similar relationships were obtained with contracture solutions containing D6000 (3–12 μmol/liter). However, under these conditions higher concentrations of Ca2+ or Ni2+ were required in order to fully maintain tension. After a step concentration change in the medium during contracture, the effects of Ca2+ or D600 were detectable only after a delay of 9 and 18 sec, respectively. It is concluded that divalent cations and D600 compete for the same binding site according to a 1:1 reaction. This site is presumably located inside the transverse tubular system and controls inactivation of the contractile force.
    Type of Medium: Electronic Resource
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