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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 2529-2534 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Current-noise-power spectra of thin-film transistors (TFTs) fabricated from hydrogenated amorphous silicon were measured. TFTs with aspect ratios ranging from 1:1 to 16:1 were examined in both the conducting and nonconducting modes. In the conducting mode, the noise levels could be predicted to within an order of magnitude by theories developed for crystalline metal-oxide field-effect transistors. In the nonconducting mode, the noise was found to scale with the TFT leakage current in a power-law fashion.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Nuclear Instruments and Methods in Physics Research Section A: 299 (1990), S. 143-146 
    ISSN: 0168-9002
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Nuclear Instruments and Methods in Physics Research Section A: 310 (1991), S. 460-464 
    ISSN: 0168-9002
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Nuclear Instruments and Methods in Physics Research Section A: 266 (1988), S. 351-355 
    ISSN: 0168-9002
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Pflügers Archiv 328 (1971), S. 265-278 
    ISSN: 1432-2013
    Keywords: Renal Excretion of Uric Acid ; Rats ; Tubular Reabsorption of Uric Acid ; Tubular Secretion of Uric Acid ; Reduction of GFR ; Mannitol Diuresis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé L'excrétion rénale de l'acide urique a été étudiée chez le rat éveillé par des mesures de clearance, à différents taux plasmatiques d'acide urique et dans différentes conditions de débit et de pH urinaires. Le taux plasmatique d'acide urique a été augmenté par une injection initiale soit i.v., soit i.v. et i.p., suivie d'une perfusion i.v. d'acide urique dissous dans du THAM. Au taux plasmatique d'acide urique d'un rat normal (0,6–1,5 mg-%), 16% seulement de la quantité d'acide urique filtrée est excrétée, preuve d'une réabsorption tubulaire importante. Avec l'augmentation du taux plasmatique, ce pourcentage augmente, sans dépasser 100 aux taux plasmatiques atteints (15–20 mg-%), et ceci quelles que soient les conditions expérimentales choisies (diurèse osmotique, abaissement opératoire de la filtration glomérulaire). Une excrétion d'acide urique persistante, aux taux plasmatiques très bas et inférieurs au seuil d'apparition extrapolé suggère l'existence d'un mécanisme de sécrétion tubulaire d'acide urique concommittant. Deux souches de rats de type Wistar se distinguent quant à l'excrétion d'acide urique.
    Notes: Summary The renal excretion of uric acid was studied in unanesthetized rats by clearance methods at different levels of plasma concentrations, of urine flow and of urinary pH. The plasma concentrations were increased by priming the animal either i.v., or i.v. and i.p., and by infusing uric acid. At physiological plasma levels (0.6–1.5 mg-%), only 16% of the filtered amount of uric acid was excreted. Thus, uric acid was extensively reabsorbed. When the plasma levels were increased up to 15–20 mg-% the fraction of the filtered amount excreted in the urine increased, but never exceeded 100%, even in animals subjected to a decrease of GFR by constriction of the aorta and to mannitol diuresis. Tubular secretion of uric acid in the rat was suggested by the persistence of urinary excretion at very low plasma levels. A difference between two strains of rats with respect to renal uric acid excretion was observed.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Pflügers Archiv 328 (1971), S. 279-291 
    ISSN: 1432-2013
    Keywords: Renal Excretion of Uric Acid ; Rats ; Tubular Reabsorption of Uric Acid ; Tubular Secretion of Uric Acid ; Probenecid ; Sulfinpyrazone ; Hydrochlorothiazide ; PAH ; Pyrazinamide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé L'excrétion rénale de l'acide urique a été étudiée chez le rat nonanesthésié par des mesures de clearances, avant et après l'administration d'agents inhibiteurs des transports d'acide urique. Le probénécide (200 mg/kg p.c., i.v.) a un effet uricosurique très significatif chez des animaux à taux plasmatique d'acide urique normal; cet effet diminue avec l'augmentation du taux plasmatique d'acid urique. La sulfinpyrazone (50 mg/kg p.c., i.v.) n'a pas d'effet uricosurique significatif, quel que soit le taux plasmatique d'acide urique. L'hydrochlorothiazide (5 mg/kg p.c., i.v., puis 1 mg/min·kg p.c., i.v.) n'a pas d'effet significatif sur l'excrétion rénale de l'acide urique chez le rat. Le PAH (25 mg/kg p.c., i.v., puis 3,5 mg/min·kg p.c., i.v.) et la pyrazinamide (100 mg/kg p.c., i.v., puis 1,2 mg/min·kg p.c., i.v.), inhibiteurs de la sécrétion, diminuent d'autant plus fortement l'excrétion d'acide urique, que le taux plasmatique d'acide urique est plus élevé. L'interprétation de ces observations est discutée.
    Notes: Summary The influence of inhibitors of renal tubular reabsorption and/or of renal tubular secretion of uric acid on the urinary excretion of uric acid was studied in unanesthetized unloaded rats (plasma concentration of uric acid 1 to 1.5 mg-%), in animals preloaded by the intravenous route (plasma uric acid 1.5 to 5 mg-%) and in rats preloaded intraperitoneally and intravenously (plasma uric acid 5 to 15 mg-%). Probenecid (200 mg/kg b.w.) had a pronounced uricosuric effect at the physiological low plasma level of uric acid. This effect became far less conspicuous at higher plasma levels. Sulfinpyrazone (50 mg/kg b.w.) had no significant uricosuric effect. Hydrochlorothiazide (priming 5 mg/kg b.w., infusion of 1 mg/min·kg b.w.) was equally ineffective. The infusion of PAH (priming 25 mg/kg b.w., infusion of 3,5 mg/min·kg b.w.) or of pyrazinamide (priming 100 mg/kg b.w., followed by 1.2 mg/min·kg b.w.) depressed the tubular secretion of uric acid at high plasma levels. This effect was far less marked at medium or at low plasma levels. The data are discussed.
    Type of Medium: Electronic Resource
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