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  • 1
    Electronic Resource
    Electronic Resource
    Effect of oxygen incorporation on magnetoresistance in Co/Cu multilayers : 38th Annual Conference on Magnetism and Magnetic Materials (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 6540-6542 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The background pressure dependence of magnetoresistance (MR) ratio of Co/Cu multilayer films and the effect of the Fe buffer layer were studied. Secondary ion mass spectrometry (SIMS) measurement of the films and in situ quadrupole mass spectrometry (QMS) analysis in conjunction with background pressure dependence of MR ratio confirmed that the oxidation of Co/Cu gives a crucial influence to the giant magnetoresistance (GMR) effect. The oxidation of Co/Cu weakens the antiferromagnetic coupling, and results in the low MR ratio. The Fe buffer layer absorbs the residual oxygen, and this leads to the increase of the MR ratio. The MR ratio of (Co1 nm/Cu1 nm)100/Fe2.5 nm film deposited under low background pressure and high deposition rate so as to suppress oxidation reached over 80% at RT and 160% at 2 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.356941
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  • 2
    Electronic Resource
    Electronic Resource
    Phase transition in constrained polymer gels (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 101 (1994), S. 10003-10007 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Equilibrium diameter and stress change of cylindrical N-isopropylacrylamide gels of submillimeter diameter were measured as a function of temperature under mechanical constraint along the uniaxial direction. As a result, the transition temperature increased up to 1 °C with increasing the strain, which indicates the possibility of the uniaxial strain-induced phase transition of gels at selected temperatures. The diameter and stress change were quite successfully described by the phenomenological model on the basis of the extended Flory-type free energy. The time course of the change in diameter and stress was also studied after the large steplike elongation was rapidly applied. A gradual increase in diameter during decrease in stress was detected clearly in the swollen phase, which is due to the relaxation of polymer segmental units to approach the favored conformation under the strong deformation. © 1994 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.468049
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  • 3
    Electronic Resource
    Electronic Resource
    Preparation of stable and photoconductive hydrogenated amorphous silicon from a Xe-diluted silane plasma (1991)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 58 (1991), S. 2494-2496 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Photoconductive and stable hydrogenated amorphous silicon thin films, prepared by plasma-enhanced chemical vapor deposition using a Xe-silane mixture at a substrate temperature of 250 °C, did not show any photo-induced degradation of the photoconductivity after 104 min light soaking (air mass-1, 100 mW/cm2). The network structure of these films is inhomogeneous and includes a large amount of clustered hydrogen as indicated by the low-temperature thermal effusion and the large, broad component in the nuclear magnetic resonance spectrum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.104854
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  • 4
    Electronic Resource
    Electronic Resource
    Observation of highly nondegenerate four-wave mixing ((approximately-greater-than)1 THz) in an InGaAsP multiple quantum well laser (1991)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 58 (1991), S. 1458-1460 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Highly nondegenerate four-wave mixing (NDFWM) in the pump-probe detuning region of more than 1 THz has been observed in an InGaAsP multiple quantum well laser for the first time. Each of the probe and signal frequencies is closed to cavity resonance modes for the pump laser and those outputs are enhanced. The highly NDFWM process is based on a mechanism whose response time is less than 0.2 ps.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.105196
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  • 5
    Electronic Resource
    Electronic Resource
    Reduced light-induced changes of photoconductivity in duterated amorphous silicon (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 68 (1990), S. 3738-3740 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The light-induced decrease of the photoconductivity in deuterated amorphous silicon is a factor of 3 less even though the defect density increase is greater than in hydrogenated material having equivalent as-deposited properties. Consequent changes in the average recombination cross section of the defects is illustrated. Since the differences in the light soaking behavior upon isotopic substitution has been found to disappear in films deposited at low temperatures, the changes are thought to arise from differences in the silicon network occurring during growth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.346288
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  • 6
    Electronic Resource
    Electronic Resource
    Substrate temperature effect on giant magnetoresistance of sputtered Co/Cu multilayers (1993)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 63 (1993), S. 2839-2841 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The relation between giant magnetoresistance (GMR) and the substrate temperature was investigated in sputtered Co/Cu multilayers. The magnetoresistance (MR) ratio is increased as the substrate temperature is decreased. The increase in the MR ratio is considered to be caused by the improvement in the sharpness of interfaces as concluded from the satellite peak intensity of the x-ray diffraction. The rough interfaces reduce the antiferromagnetic coupled areas and result in the MR ratio decrease. By lowering the substrate temperature to 20 °C, the MR ratio of 80% at room temperature was obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.110791
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  • 7
    Electronic Resource
    Electronic Resource
    Malignant lymphoma of the urethra: report of a case with detection of Epstein–Barr virus genome in the tumour cells (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Histopathology 24 (1994), S. 0 
    Details
    ISSN: 1365-2559
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: We report a primary non-Hodgkin's B-cell lymphoma of the urethra in a 78-year-old female. Serum antibodies for Epstein–Barr virus (EBV) were negative, but there was a 40-fold increase in antibodies to EBV-associated nuclear antigen. Using PCR and in situ hybridization techniques, EBV genome was found in the tumour cell nuclei.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2559.1994.tb00570.x
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  • 8
    Electronic Resource
    Electronic Resource
    Histopathologic study of epithelial components in the connective tissue wall of unilocular type of calcifying odontogenic cyst (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral pathology & medicine 19 (1990), S. 0 
    Details
    ISSN: 1600-0714
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Histopathologic study of satellite cysts and odontogenic epithelial islands in connective tissue wall of unilocular type of calcifying odontogenic cyst (COC) was made. The material was 13 cases consisting of 3 simple unicystic COCs, 9 odontome producing COCs and 1 ameloblastomatous proliferating COC. Satellite cysts were found in 6 cases, and were histologically classified into following types: simple cystic, odontome producing and ameloblastomatous. Histologic types of satellite cysts did not coincide with those of main cystic lesions in some cases. Odontogenic epithelial islands with or without proliferating feature were found in 9 cases, and were found in all cases with satellite cysts. Melanin and melanocytes were seen in an ameloblastomatous satellite cysts of 1 of 3 pigmented COCs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0714.1990.tb00807.x
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  • 9
    Electronic Resource
    Electronic Resource
    Overexpression of anti-apoptotic Mcl-1 in testicular germ cell tumours (2005)
    Oxford, UK : Blackwell Science Ltd
    Histopathology 46 (2005), S. 0 
    Details
    ISSN: 1365-2559
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Aims:  To determine the expression of Mcl-1 in testicular germ cell tumours in order to clarify the role of this anti-apoptotic factor in these tumours. Various members of the Bcl-2 family have been implicated in the apoptotic mechanisms regulating germ cell apoptosis. Mcl-1 is an anti-apoptotic Bcl-2 family member and has recently been reported to be related to the progression of malignancy; however, the involvement of Mcl-1 in the development of germ cell tumours is still unknown.Methods and results:  Mcl-1 expression in testicular germ cell tumours was investigated by immunohistochemistry and reverse transcriptase-polymerase chain reaction (RT-PCR). By immunohistochemistry, overexpression of Mcl-1 was present in all germ cell tumours that were studied, including embryonal carcinoma and yolk sac tumour, as well as choriocarcinoma and teratoma. In teratomas, Mcl-1 was widely distributed in the epithelial, myogenic, neural and mesenchymal components. RT-PCR analysis after microdissection revealed high levels of Mcl-1 mRNA in all tumour variants compared with non-neoplastic germ cells.Conclusion:  Overexpression of anti-apoptotic Mcl-1 may function to enhance the viability of testicular germ cells, thereby leading to tumorigenesis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2559.2005.02118.x
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  • 10
    Electronic Resource
    Electronic Resource
    Crystallization and preliminary X-ray studies on the trypsin inhibitor I-2 from wheat germ and its complex with trypsin (1993)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 49 (1993), S. 594-596 
    Details
    ISSN: 1399-0047
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: A Bowman–Birk type trypsin inhibitor I-2, Mr = 14 000, 123 amino-acid residues, isolated from wheat germ, and its complex with trypsin have been crystallized. For I-2 two morphologically different crystal forms were obtained. Crystal form 1 is tetragonal, P4122 or P4322, with a = 55.45 (2), c = 129.1 (2) Å and V = 3.97 (2) × 105 Å3. The crystals diffract X-rays very anisotropically, to less than 6 Å resolution normal to the c* direction, but up to 3 Å resolution in the other directions. Crystal form 2 is monoclinic, space group C2. The cell parameters show significant variation even for crystals in the same batch. The median parameters are: a = 83.9, b = 41.5, c = 45.7 Å, β = 95.9° and V = 1.58 × 105 Å3. The diffraction pattern is isotropic and reflections up to 2.2 Å resolution were observed. The crystals of the complex between bovine trypsin and I-2 (2:1) belong to the orthorhombic space group P212121 with a = 73.49 (2), b = 120.56 (3), c = 70.04 (2) Å and V = 6.206 (5) × 105 Å3. The crystals diffract up to 2.3 Å resolution, and contain one complex of 60 100 Da in an asymmetric unit.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0907444993006134
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