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  • 1
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 68 (1996), S. 702-704 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Nb/Al–AlOx/Nb tunnel junctions designed for x-ray detection have been manufactured and characterized at temperatures down to 0.35 K. At a bias voltage of 0.5 mV, a leakage current of the order of 0.1 pA/μm2, and a dynamic resistance exceeding 106 times the normal state resistance, were achieved in junctions with dimensions up to 200×200 μm2 and critical current densities of order 200 A/cm2. The combination of high critical current density, low leakage current, and large area represents an important step towards the development of superconducting tunnel junction detectors with improved spectroscopic performance. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 2914-2916 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The tilt angle of the c axis from the film normal in Co-Cr flexible media fabricated by continuous sputter deposition is determined by analyzing torque curves, and is compared with that obtained by x-ray diffraction. A discussion is given concerning the perpendicular anisotropy constant obtained from torque curves with and without considering such a tilt angle of the c axis.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 2929-2931 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effect of Pr on both the magnetic properties and microstructure of Co-Cr alloys is discussed. The saturation magnetization Ms and perpendicular magnetic anisotropy Ku at room temperature is found to increase with Pr, becoming maximum at about 0.5 wt. % Pr, and then decreases monotonously. The microstructure is also changed with Pr, leading to a less-defined columnar structure. However, no significant change is found in the Auger spectra for various contents.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 60 (1992), S. 234-236 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The conductance of the wide-narrow geometry in the ballistic transport regime has been calculated by numerical scattering matrix methods. The oscillations of the conductance as a function of the width of the wide region relative to that of the narrow region was found. The period of oscillation corresponds to twice the width, where a new subband is generated as the width of the wide region is increased. The amplitude of the oscillation decreases with an increase in the width of the wide region. The effects of contact potential at a junction are also discussed.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 79 (2001), S. 1864-1866 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The triple-barrier coupled quantum dots have been fabricated in individual single-wall carbon nanotubes by depositing a narrow SiO2 layer in between metallic source–drain contacts. The current–voltage characteristics at 4.2 K with different gate voltages before the SiO2 deposition have indicated the formation of a single quantum dot. After the SiO2 deposition, the irregular Coulomb diamonds and the negative differential conductance have been observed, which suggests the formation of coupled quantum dots. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Physiology 60 (1998), S. 199-220 
    ISSN: 0066-4278
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Medicine , Biology
    Notes: Abstract Since the molecular identification of the first aquaporin in 1992, the number of proteins known to belong to this family has been rapidly increasing. These members may be separated into two subgroups based on gene structure, sequence homology, and function. Regulation of the water permeability of the collecting ducts of the kidney is essential for urinary concentration. Aquaporin-2 and -3, which are representative of these subgroups, are colocalized in the collecting ducts. Understanding these subgroups will elucidate the differences between aquaporin-2 and -3. Aquaporin-2 is a vasopressin-regulated water channel located in the apical membrane, and aquaporin-3 is a constitutive water channel located in the basolateral membrane. In contrast to aquaporin-3, which appears to be less well regulated, many studies have now identified multiple regulational mechanisms at the gene, protein, and cell levels for aquaporin-2, thus reflecting its physiological importance. Evidence of the participation of aquaporin-2 in the pathophysiology of water-balance disorders is accumulating.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 2591-2595 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The Ar-electron-cyclotron-resonance (ECR) microwave (MW) plasma has been applied on GaAs surfaces for investigating the effects of radio-frequency bias on etching reaction and radiation damage. The etch depths as a function of the etching time gave a linear profile with etch rates of 75 and 100 A(ring)/min for 150- and 300-W MW powers under a 4-W rf bias, respectively, but for the etch rates an exponential profile is obtained as a function of the square root of the rf bias power. The electrical characteristics of Schottky barriers fabricated on the etched surface show strong rf bias dependence. Increasing the rf bias power, the donor concentration near surface and the barrier height decrease but the ideality factor and the depletion layer width increase monotonically. The changes are attributed to the radiation damage induced by the Ar ECR plasma which becomes gradually deeper in the damage layer and higher in concentration with increasing rf bias power. The rf biasing in the ECR plasma (which has the exceptional characteristic of being applicable to semi-insulating specimens) is very similar in effect to dc biasing.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The salivary glands of non-obese diabetic (NOD) mice and BALB/c controls were evaluated for the stimulatory effects of the following neuropeptides; substance P (SP), vasoactive intestinal polypeptide (VIP), and neuropeptide Y (NPY). Injection of either of the three neuropeptides in combination with the muscarinic–cholinergic agonist pilocarpine increased saliva flow rates in BALB/c mice while there was no observable augmentation to flow rates in pre-diabetic or diabetic NOD mice. Small increases in protein content of the stimulated saliva were observed in the BALB/c group of animals with the injection of any of the above neuropeptides in combination with pilocarpine. In pre-diabetic NOD animals, only VIP and NPY increased the protein content-ratio above pilocarpine alone. Radioimmunoassay determination of neuropeptide concentrations in the submandibular and parotid glands revealed reduced levels of SP with diabetes onset as compared with pre-diabetic NOD or BALB/c mice. The levels of NPY were similar between BALB/c and NOD animals except in the pre-diabetic parotid gland where NPY concentrations were 1.3-fold greater. On the other hand, VIP concentrations were substantially reduced in the submandibular gland of NOD mice, while in the parotid gland neuropeptide levels were evaluated 3.8-fold relative to BALB/c controls. Immunohistochemical staining of the parotid and submandibular glands for SP revealed primarily ductal cell staining which was reduced with diabetes onset in NOD animals. These findings further define the sialoadenitis observed in NOD mice to be due, in part, to a general loss of neurotransmitter responsiveness on the part of salivary gland cells.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 193 (1993), S. 235-239 
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 192 (1993), S. 561-567 
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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