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  • 1
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 84 (1986), S. 5580-5588 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The reaction of electronically excited Na(3P) atoms with HCl has been studied in a crossed molecular beams experiment. At collision energies slightly above the endoergicity of the reaction, Na(3P) shows a dramatic enhancement of reactivity over ground state Na(3S). Detailed measurements of the laboratory angular and velocity distributions of the reactively scattered NaCl product at 5.4 kcal/mol collision energy have allowed determination of the product center-of-mass translational and angular distributions. These experimental results are compared to the DIPR model of electron transfer reactions. The broad translational energy distribution is in qualitative agreement with the DIPR model, but the angular distribution exhibits reduced intensity for scattering perpendicular to the relative velocity vector which cannot be reproduced by the DIPR model. The preferred transition state configuration, Na–Cl–H, is consistent with what would be predicted by a diffuse 3P orbital where the Na atom appears ion-like. This configuration is opposite to that given by the dominant term in the long range multipolar expansion of the neutral reactant potential.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Electrical resistivity and magnetic susceptibility show that single phase EuBa2Cu3O x becomes superconducting at 94 K. Magnetization and magnetoresistivity yield a lower critical field of Hc1≃500 G and a variation ofT c with magnetic field of dT c /dH≃1 K/T. The high temperature resistivity shows that at about 700 K due to oxygen loss the sample is driven into a semiconducting state, in which the superconductivity is destroyed. The normal state magnetic susceptibility measured in the superconducting and in the oxygen degased, semiconducting sample indicates that the sample is paramagnetic in the normal state. This paramagnetism is larger than the one expected for trivalent Eu and therefore has to be attributed in part to a magnetic moment on Cu. Eu is found to be stable trivalent between 300 and 4.2 K through Mößbauer-spectroscopy.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Tunneling and point-contact measurements have been performed on different high-T c superconductors M−Ba2Cu3O7 with M=Y, La, Eu. The average energy gaps deduced from the tunneling spectra are about 2Δ=33 meV for the Y- and La-type samples and about 2Δ=38 meV for the Eu-type samples, which give ratios 2Δ/k B T c in the range from 4 to 6. The point-contact characteristics show a distinct minimum in the differential resistance about zero bias and additional sharp spikes up to 40 mV. From these pointcontacts we can give an estimate of the critical current, yielding values in the range from 0.2 to 3 mA.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 73 (1986), S. 314-321 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 5
    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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  • 6
    ISSN: 1432-1998
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In vivo31P-magnetic resonance spectroscopy (MRS) was used to determine the phosphorus metabolite levels in the brain and kidney of infant rabbits and adult rats and in the liver of infant rabbits and adult and infant rats. For31P-MRS of the brain, a surface, radiofrequency coil was placed on the anterosuperior region of the head; for31P-MRS of the liver and kidney, a radiofrequency coil was chronically implanted either between the hepatic lobes or around the kidney.31P-MR spectra were found to show large variations in the levels of the phosphorus metabolites depending on the species, the organ, and the age of the animal. The phosphate monoester (MP)/adenosine triphosphate (ATP) ratio was significantly higher and the phosphocreatine (PCr)/ATP ratio was significantly lower in the brains of infant rabbits than in the brains of adult rats. Comparison of these data with data reported for humans and other animals suggests that these differences are due mainly to differences in age and not to differences among species. The phosphodiester (PD)/ATP ratio was found to be significantly higher in the livers of infant rabbits than in the livers of adult and infant rats — a difference more likely related to the species than to age. The kidneys of the infant rabbits showed a higher PCr/ATP radio than the kidneys of the adult rats, but this difference might be due to the influence of PCr in the surrounding muscle.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 44 (1987), S. 41-44 
    ISSN: 1432-0649
    Keywords: 42.65 Cq
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Tunable coherent radiation around 840, 830, and 795 nm has been generated upon two-photon excitation of sodium 4d and 5s levels, respectively. The generation is due to special parametric processes. A molecular nature of the emissions, as recently proposed, can be ruled out by the performed investigations.
    Type of Medium: Electronic Resource
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  • 8
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    Unknown
    Berlin : Periodicals Archive Online (PAO)
    Deutsche Zeitschrift für Philosophie. 34:1 (1986) 32 
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  • 9
    ISSN: 1432-0983
    Keywords: Candida maltosa ; Transformation ; LYS2
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary We have isolated five mutants of Candida maltos, which lack the 2-aminoadipate reductase activity, an enzyme involved in the lysine biosynthesis. By means of complementation analysis using protoplast fusion, the isolated mutants were divided into two complementation groups. Thereof the C. maltosa strain G457 could be transformed by the plasmids pDP12 and pDP13, which contain the L YS2-coding gene of Saccharomyces cerevisiae. On the basis of our presented results obtained by studies on hybridization, stability, and recovery of plasmids from C. maltosa transformants, we suggest that transformation does proceed integratively.
    Type of Medium: Electronic Resource
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  • 10
    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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