Bibliothek

X
feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
  • 1
    Digitale Medien
    Digitale Medien
    Room-temperature operation of a memory-effect AlGaAs/GaAs heterojunction field-effect transistor with self-assembled InAs nanodots (2000)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 76 (2000), S. 1464-1466 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: This letter describes the memory effect of an AlGaAs/GaAs heterojunction field-effect transistor that contains InAs nanodots in the barrier layer. The device experiences a shift of threshold gate voltage, as a function of the amount of the electrons trapped in the nanodots. These trapped electrons can be injected by applying a positive gate voltage and be erased by a visible light illumination at negative gate bias. Although the shift of the threshold gate voltage volatilizes with the time after the memory programing operation, a considerable part of the shift is retained even after 100 h at room temperature. © 2000 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.126065
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 2
    Digitale Medien
    Digitale Medien
    Effect of omeprazole 10 mg on intragastric pH in three different CYP2C19 genotypes, compared with omeprazole 20 mg and lafutidine 20 mg, a new H2-receptor antagonist (2003)
    Oxford, UK : Blackwell Science Ltd
    Alimentary pharmacology & therapeutics 18 (2003), S. 0 
    Details
    ISSN: 1365-2036
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Background : Omeprazole 10 mg is used as maintenance therapy for gastro-oesophageal reflux disease, but previous reports have not mentioned the potency of its acid suppression.Aim : To evaluate the potency of acid suppression with omeprazole 10 mg, in relation to CYP2C19 genotypes.Methods : Eighteen healthy subjects without Helicobacter pylori participated. After a 7-day regimen of omeprazole 10 mg, 20 mg, lafutidine 20 mg (a novel H2-receptor antagonist) or water only (baseline data), intragastric pH was measured for 24 h.Results : With omeprazole 10 mg, greater differences were observed than 20 mg in median pH values and pH 〉 4 holding time ratios between poor metabolizers (PMs, n = 6) and the others [homozygous extensive metabolizers (homo-EMs, n = 6) and heterozygous extensive metabolizers (hetero-EMs, n = 6)]. With lafutidine 20 mg, these parameters were not influenced by the genotype. The potency of acid suppression was: omeprazole 20 mg ≈ lafutidine 20 mg 〉 omeprazole 10 mg in homo-EMs, omeprazole 20 mg 〉 omeprazole 10 mg ≈ lafutidine 20 mg in hetero-EMs, and omeprazole 20 mg ≈ omeprazole 10 mg 〉 lafutidine 20 mg in PMs.Conclusions : Omeprazole 10 mg strongly suppresses acid secretion, but depending on the CYP2C19 genotypes shows greater interindividual variations in suppression than 20 mg.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1046/j.1365-2036.2003.01804.x
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 3
    Digitale Medien
    Digitale Medien
    Mechanisms of Cytosolic Ca2+ Suppression By Prostaglandin E2 Receptors in Rat Melanotrophs (2003)
    Oxford, UK : Blackwell Science Ltd
    Journal of neuroendocrinology 15 (2003), S. 0 
    Details
    ISSN: 1365-2826
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: We have previously reported that voltage-dependent Ca2+ (VDC) channels of rat melanotrophs are inhibited by prostaglandin E2 (PGE2). In this study, mechanisms involved in the inhibitory actions of PGE2 receptors of rat melanotrophs were analysed using reverse transcriptase-polymerase chain reaction (RT-PCR), Ca2+-imaging and whole-cell, patch-clamp techniques with recently developed EP agonists, each of which is selective for the known four subclasses of EP receptors (EP1–4). PGE2 reversibly suppressed the cytosolic Ca2+ concentration ([Ca2+]i). The maximum reduction in [Ca2+]i by PGE2 was comparable to that by dopamine or to that by extracellular Ca2+ removal. RT-PCR analysis of all four EP receptors revealed that EP3 and EP4 receptor mRNAs were expressed in the intermediate lobe. The effects of PGE2 to suppress [Ca2+]i were mimicked by the selective EP3 agonist, ONO-AE-248, whereas three other EP agonists, ONO-DI-004 (EP1), ONO-AE1-259 (EP2) and ONO-AE1-329 (EP4), had little or no effect on [Ca2+]i. All four G-protein activated inward rectifying K+ (GIRK) channel mRNAs were identified in intermediate lobe tissues by RT-PCR. Dopamine concentration-dependently activated GIRK currents, whereas PGE2 did not activate GIRK currents, even at the concentration causing maximal inhibition of VDC channels. These results suggest that PGE2 acts on EP3 receptors to suppress Ca2+ entry of rat melanotrophs by selectively inhibiting VDC channels of these cells. We have compared the possible cellular and molecular mechanisms of inhibition by dopamine and PGE2.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1046/j.1365-2826.2003.00864.x
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 4
    Digitale Medien
    Digitale Medien
    Organ-Derived Dependence of Biomineralization in Type I Collagen Gel (2000)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 192-195 (Sept. 2000), p. 709-712 
    Details
    ISSN: 1013-9826
    Quelle: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Thema: Maschinenbau
    Materialart: Digitale Medien
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/45/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.192-195.709.pdf
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 5
    Digitale Medien
    Digitale Medien
    Aciculin and its relation to dystrophin: immunocytochemical studies in human normal and Duchenne dystrophy quadriceps muscles (2000)
    Springer
    Acta neuropathologica 99 (2000), S. 654-662 
    Details
    ISSN: 1432-0533
    Schlagwort(e): Key words Aciculin ; Dystrophin ; Binding site ; Normal and dystrophic muscles ; Ultrastructural ¶localization
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Aciculin is a novel adherens junction antigen extracted from human uterine smooth muscle that is reported to associate biochemically with dystrophin. We attempted to determine (i) the immunostainability of anti-aciculin antibody for the 6 histochemically normal human muscles and seven muscles from boys with Duchenne muscular dystrophy(DMD) and 11 disease control muscles, (ii) the ultrastructural localization of aciculin in normal skeletal myofibers, (iii) aciculin’s spacial relationship with dystrophin and β-spectrin, and (iv) if the aciculin is ultrastructurally colocalized with dystrophin, the distance from the aciculin epitope to the epitope of the dystrophin N- or C-terminal domain. For this, rabbit anti-aciculin antibody was generated against the synthetic peptide of aciculin fragment D [4]. Immunohistochemical staining showed that the immunostainability of DMD muscles for anti-aciculin antibody was markedly decreased as compared with normal and disease control muscles. Single and double immunogold labeling electron microscopy of 6 histochemically normal human quadriceps femoris muscles revealed that aciculin was present along the inner surface of muscle plasma membrane and that aciculin formed doublets more frequently with dystrophin (23.5 ± 1.8%; group mean ± SE) than with β-spectrin (12.8 ± 1.1%; P 〈 0.01 two tailed t test). Rabbit anti-aciculin antibody frequently formed doublets with monoclonal antibodies against the N- or C-terminal domain of dystrophin at the muscle cell surface. These results suggest that aciculin is associated with dystrophin and may interact with both the N- and C-terminal domains of dystrophin.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s004010051176
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 6
    Digitale Medien
    Digitale Medien
    Quantitative chromosome maps and rDNA localization in the T subgenome of Nicotiana tabacum L. and its putative progenitors (2000)
    Springer
    Theoretical and applied genetics 101 (2000), S. 1180-1188 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Key words Quantitative idiogram ; Prometaphase chromosome ; Image analysis ; Fluorescence in situ hybridization ; T subgenome progenitor
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract  Using DAPI-stained prometaphase chromosomes, quantitative idiograms were constructed for the T subgenome of Nicotiana tabacum (2n = 4x = 48, SSTT) and two putative candidates for its T subgenome progenitor, Nicotiana otophora and Nicotiana tomentosiformis (both have 2n = 24, TT). The large chromosomes of the three karyotypes could be identified from the distributional pattern of the DAPI signal. Fluorescence in situ hybridization (FISH) with 5S rDNA gave not only good cytogenetical landmarks for identification of small chromosomes of the karyotypes but also phylogenetical information. In all three idiograms, 5S rDNA was localized in the proximal region of the long arm of a small submetacentric pair, but an additional 5S rDNA locus was detected terminally on the short arm of a small metacentric pair in N. otophora. The 18S rDNA locus detected here corresponded to satellite regions in all three karyotypes. Two satellited pairs in N. otophora and one satellited pair in N. tomentosiformis had single large subterminal DAPI blocks and two interstitial DAPI bands on their long arms, respectively. For the T subgenome component of N. tabacum, the single intense DAPI band was depicted on the center of the long arm of a satellited pair in the idiogram, although two interstitial bands were often detected on the long arm of the satellited pair in some spreads. Therefore, it was suggested that the T component of N. tabacum was more similar to that of N. tomentosiformis than N. otophora, especially in respect of the number and location of rDNA and the distributional patterns of DAPI signals.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s001220051595
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 7
    Digitale Medien
    Digitale Medien
    Hematite in pyrophyllite ore deposits, Shobara district, southwestern Japan (2000)
    Springer
    Mineralogy and petrology 70 (2000), S. 15-23 
    Details
    ISSN: 1438-1168
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Hämatit aus Pyrophyllitlagerstätten des Shobara Distriktes, SW Japan Hämatit ist ein typisches Mineral in Liesegang-Gesteinen aus Pyrophyllitlagerstätten des Shobara Distriktes, südwestliches Japan. Dieses Mineral koexistiert mit feinkörnigem Pyrophyllit und Quarz, wobei die Hämatitkristalle charakteristischerweise nadel- bis faserförmig ausgebildet sind. Sie sind nur einige Mikrometer lang und sind im Reflexionsmikroskop daher nur bei starker Vergrößerung in Ölimmersion zu beobachten. Diese feinen Kristalle bilden ringförmige Aggregate mit mehreren Zehner-μm Durchmessern aus. Die Kristalle sind sehr oft radialstrahlig in diesen Ringen angeordnet. Mikrosondenuntersuchungen zeigen, dass die Hämatitkristalle fast reines Eisenoxid mit weniger als 0.9 Gew.% Ti sind. XRD Studien belegen, dass Hämatit das einzige Eisenmineral in den Liesegang-Gesteinen ist; d.h. es gibt keine Hinweise auf Fe-Hydroxide. Dies wird durch die Untersuchung des Wassergehaltes und IR Spektroskopie bestätigt.
    Notizen: Summary Hematite is a characteristic mineral of Liesegang rock in the pyrophyllite ore deposits, Shobara district, southwestern Japan. The mineral intimately coexists with fine-grained pyrophyllite and quartz. The hematite crystals are characteristically needle-shaped to fibrous, and several microns in length, and can only be observed by high-magnification reflected light microscopy with oil immersion lens. They occur as ring-shaped aggregates several tens of microns in diameter. Moreover, the crystals are often arranged radially within the rings. Microprobe analyses reveal that hematite crystals are almost pure iron oxide, with less than 0.9 wt.% Ti. X-ray powder diffraction patterns and reflection intensities indicate that hematite is the only iron mineral in the Liesegang rock, i.e., no hydrous iron oxides are present. This observation was also confirmed by examinations of water content and infrared spectroscopy.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s007100070010
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 8
    Digitale Medien
    Digitale Medien
    Development of new position sensitive electron multiplication device fabricated by LIGA process (2000)
    Springer
    Microsystem technologies 6 (2000), S. 90-93 
    Details
    ISSN: 1432-1858
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Technik allgemein
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s005420050004
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 9
    Digitale Medien
    Digitale Medien
    Synthesis of large-surface area silica-modified titania ultrafine particles by the glycothermal method (2000)
    Springer
    Journal of materials science 19 (2000), S. 1439-1443 
    Details
    ISSN: 1573-4811
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1006723422629
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 10
    Digitale Medien
    Digitale Medien
    Reactions of rare earth acetate hydrates in glycols at high temperatures (2000)
    Springer
    Journal of materials science 35 (2000), S. 1541-1547 
    Details
    ISSN: 1573-4803
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract The reaction of rare earth acetate hydrate in ethylene glycol at 300°C yielded two novel crystalline products, one from La-Gd and the other from Tb-Lu and Y. IR and NMR spectra of these products suggested the presence of both acetate groups and ethylene glycol moieties, and it was concluded that these products are ethylene glycol complexes of rare earth acetate (hydroxide) oxide. On the other hand, the reaction of rare earth acetate hydrate in other glycols such as 1,3-propanediol and 1,4-butanediol yielded rare earth diacetate hydroxide, two morphs of rare earth acetate oxide and rare earth acetate dihydroxide, depending on the ionic size of rare earth element, but the glycol complexes were not formed. In all cases, acetate groups of rare earth acetate were not completely eliminated from the coordination sites of the rare earth element by the reaction in glycols but the reaction in ethylene glycol could liberate the acetate groups more easily than other glycols because of high coordination ability of ethylene glycol.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1004709803248
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...