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  • Articles  (102)
  • Humans  (49)
  • Inorganic Chemistry  (34)
  • pharmacokinetics  (19)
  • 2010-2014
  • 1980-1984  (102)
  • 1981  (102)
Collection
  • Articles  (102)
Years
  • 2010-2014
  • 1980-1984  (102)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 19 (1981), S. 279-285 
    ISSN: 1432-1041
    Keywords: chlordiazepoxide ; alcoholic liver disease ; pharmacokinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The clearance of chlordiazepoxide from the systemic circulation was studied in 20 subjects which included 15 patients with alcoholic hepatitis and 5 normal volunteers. The half-life for the appearance of the drug in the systemic circulation was found to increase exponentially with age (r=0.73, P〈0.0005) and was independent of the presence of alcoholic hepatitis. The metabolic clearance of chlordiazepoxide was significantly lower in the patients than in the normal subjects (7.6 compared to 13.8 ml/kg-h, P〈0.005). Linear regression analysis revealed a significant correlation between clearance and albumin (r=0.77, P〈0.00005). However, the predictive value of this relationship was shown to be minimal. Multiple regression analysis produced only a slight improvement in the correlation when both albumin and lactate dehydrogenase were used as variables (r=0.83, P〈0.00005). In six of the patients, a second clearance study was conducted three weeks following their initial one. All repeat subjects showed improvement both clinically and as reflected by their laboratory tests for liver injury, but there was not a significant change in their clearance of chlordiazepoxide. Multiple regression analysis of the clearance data on the initial and repeat subjects showed a significant correlation between clearance and the variables age, albumin, and lactate dehydrogenase (r=0.91, P〈0.0025). This relationship suggests that over a short period of time (where age can be considered constant) changes in albumin and lactate dehydrogenase could be potentially useful in predicting clearance changes in a single individual.
    Type of Medium: Electronic Resource
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  • 2
    Publication Date: 1981-12-04
    Description: Leucine catabolism is regulated by either of the first two degradative steps: (reversible) transamination to the keto acid or subsequent decarboxylation. A method is described to measure rates of leucine transamination, reamination, and keto acid oxidation. The method is applied directly to humans by infusing the nonradioactive tracer, L-[15N,1-13C]leucine. Leucine transamination was found to be operating several times faster than the keto acid decarboxylation and to be of equal magnitude in adult human males under two different dietary conditions, postabsorptive and fed. These results indicate that decarboxylation, not transamination, is the rate-limiting step in normal human leucine metabolism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Matthews, D E -- Bier, D M -- Rennie, M J -- Edwards, R H -- Halliday, D -- Millward, D J -- Clugston, G A -- AM-25994/AM/NIADDK NIH HHS/ -- HD-10667/HD/NICHD NIH HHS/ -- RR-00954/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1981 Dec 4;214(4525):1129-31.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7302583" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Carbon Isotopes ; Humans ; Kinetics ; Leucine/*metabolism ; Male ; Models, Biological ; Nitrogen Isotopes ; Oxidation-Reduction
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 19 (1981), S. 119-125 
    ISSN: 1432-1041
    Keywords: tolmesoxide ; metabolite ; volunteers ; pharmacokinetics ; intravenous ; oral ; protein binding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary A high pressure liquid chromatographic assay was developed for simultaneous measurement of the plasma levels of tolmesoxide and its principal metabolite, RX71112. The assay was used to study the disposition of intravenous and oral tolmesoxide in ten normotensive subjects. Two exponential terms were required to describe the disposition of the drug following intravenous administration, whilst a single exponential term sufficied to account for the decay in the plasma concentration after oral administration. The bioavailability of oral tolmesoxide from capsules averaged 84.5% and was independent of dose. The mean half-life after i. v. dosing was 2.6 h (±0.3 SEM) compared to values of 1.9 h (±0.1 SEM) and 2.7 h (±0.5 SEM) following 200 and 400 mg oral doses respectively. In all subjects RX71112 appeared in plasma shortly after tolmesoxide following both routes of administration. The terminal half-life of the metabolite was significantly longer than tolmesoxide with a mean value of 4.9 h (±0.9 SEM) following the 200 mg oral dose of tolmesoxide. The binding of tolmesoxide and RX71112 at therapeutic plasma concentration was 36.8% (±0.5 SEM) and 58.5% (±0.3 SEM) and this remained unchanged at higher concentrations.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 20 (1981), S. 293-298 
    ISSN: 1432-1041
    Keywords: neuromuscular relaxants ; fazadinium ; pharmacokinetics ; renal failure ; neuromuscular transmission
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The pharmacokinetic behaviour and neuromuscular blockade produced by the administration of fazadinium bromide at a dose of 1 mg/kg have been studied in seven patients with end-stage renal failure. No significant differences were found in the pharmacokinetic or pharmacodynamic properties when compared with patients with normal renal function. It is suggested that fazadinium may be superior to either d-tubocurarine or pancuronium in providing muscle relaxation for patients with renal failure.
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  • 5
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Durch Umsetzung der N-lithiierten Silylamine Ph2Si(NHR)2 mit SiCl4 bzw. TiBr4 wurden die spirocyclischen Amide B (R = Me, Et, i-Pr) und C (R = i-Pr, Me3Si) dargestellt und ihre Konstitution durch Analysen, 1H- und 29Si-NMR-Spektren gesichert. Von C, R = Me3Si, wurde an einem Einkristall eine Röntgenstrukturanalyse durchgeführt. Wichtige Strukturdaten sind: TiN 1,918(2) Å, SiN endocycl. 1,750(2) Å, exocycl. 1,738(2) Å, ∢ SiNTi 90,3(1)°.Spirocyclic Titanium Amides Containing the Diphenylsila-titana-diazacyclobutane Fragment. Crystal and Molecular Structure of Ti[(NSiMe3)2SiPh2]2By reaction of the N-lithiated silylamines Ph2Si(NHR)2 with SiCl4 and TiBr4, the spirocyclic amides B (R = Me, Et, i-Pr) and C (R = i-Pr, Me3Si) respectively have been prepared. Their constitutions have been confirmed by elemental analyses and by 1H and 29Si nmr spectroscopy. C, R = Me3Si, has been investigated by a single crystal x-ray structure analysis. Important structural parameters are: TiN 1.918(2) Å, SiN endocycl. 1.750(2) Å, exocycl. 1.738(2) Å, ∢ SiNTi 90.3(1)°.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Publication Date: 1981-10-30
    Description: Squirrel monkeys pressed a level at high rates under a second-order schedule of reinforcement in which level pressing produced a brief visual stimulus that was occasionally contiguous with an intravenous injection of nicotine. The rate of lever pressing could be markedly reduced either by substituting saline for nicotine injections or by blocking the effects of nicotine with mecamylamine. The rate of level pressing could be reduced by eliminating the brief visual stimulus. These results show that nicotine can function as an effective reinforcer under a second-order schedule of drug self-administration and that an environmental stimulus associated with nicotine intake can contribute to the maintenance of persistent drug-seeking behavior.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goldberg, S R -- Spealman, R D -- Goldberg, D M -- DA00499/DA/NIDA NIH HHS/ -- DA02658/DA/NIDA NIH HHS/ -- MH07658/MH/NIMH NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1981 Oct 30;214(4520):573-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7291998" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Behavior, Animal/drug effects ; Humans ; Injections, Intravenous ; Nicotine/administration & dosage/*pharmacology ; Reinforcement (Psychology)/drug effects ; Saimiri ; Self Administration
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 7
    Publication Date: 1981-04-17
    Description: Sensory and cognitive functions were assessed in a right-handed male before and after partial and complete callosal commissurotomy. After the initial posterior section was made, there was no evidence of interhemispheric sensory transfer, although the left hemisphere did have access to stimulus-related semantic and episodic information from the right hemisphere. After the callosum was completely sectioned, this exchange was no longer observed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sidtis, J J -- Volpe, B T -- Holtzman, J D -- Wilson, D H -- Gazzaniga, M S -- 2 R01 NS15053-02/NS/NINDS NIH HHS/ -- RR001-02/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1981 Apr 17;212(4492):344-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6782673" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Cognition/*physiology ; Cognition Disorders/*physiopathology ; Corpus Callosum/*physiology/surgery ; Epilepsy, Tonic-Clonic/surgery ; Humans ; Language Disorders/*physiopathology ; Male ; Methods ; Perception/physiology ; Perceptual Disorders/*physiopathology ; Postoperative Complications/physiopathology ; Sensation/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
    Publication Date: 1981-05-01
    Description: Female prairie voles (Microtus ochrogaster) exposed to a single drop of male urine on the upper lip showed changes in concentrations of luteinizing hormone-releasing hormone (LHRH) and norepinephrine in olfactory bulb tissue; no such changes occurred in dopamine concentration. The changes were measured in the posterior but not the anterior olfactory bulb tissue of females within 1 hour after they were exposed to urine. These females also showed rapid increases in serum concentrations of luteinizing hormone. Females exposed to water on the upper lip showed none of these changes. These results suggest that in this species LHRH and norepinephrine in the olfactory bulb may mediate luteinizing hormone release in response to external (pheromonal) chemical cues.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dluzen, D E -- Ramirez, V D -- Carter, C S -- Getz, L L -- HDO9328/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1981 May 1;212(4494):573-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7010608" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arvicolinae/*physiology ; Estrus ; Female ; Gonadotropin-Releasing Hormone/*metabolism ; Humans ; Luteinizing Hormone/blood ; Male ; Norepinephrine/*metabolism ; Olfactory Bulb/*metabolism ; Pheromones/*urine ; Pregnancy ; Reproduction ; Rodentia/*physiology ; Stress, Psychological/physiopathology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 9
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-05-22
    Description: A three-tone sinusoidal replica of a naturally produced utterance was identified by listeners, despite the readily apparent unnatural speech quality of the signal. The time-varying properties of these highly artificial acoustic signals are apparently sufficient to support perception of the linguistic message in the absence of traditional acoustic cues for phonetic segments.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Remez, R E -- Rubin, P E -- Pisoni, D B -- Carrell, T D -- HD-01994/HD/NICHD NIH HHS/ -- MH 24027/MH/NIMH NIH HHS/ -- MH 32848/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1981 May 22;212(4497):947-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7233191" target="_blank"〉PubMed〈/a〉
    Keywords: Auditory Perception/physiology ; Humans ; *Phonetics ; Speech Perception/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
    Publication Date: 1981-12-11
    Description: "Small cells" or "oat cells" characterize a virulent form of lung cancer and share many biochemical properties with peptide-secreting neurones. The neuropeptide bombesin is present in all small-cell lines examined, but not in other lung cancer cell lines, suggesting that bombesinergic precursor cells in lung may give rise to this disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moody, T W -- Pert, C B -- Gazdar, A F -- Carney, D N -- Minna, J D -- New York, N.Y. -- Science. 1981 Dec 11;214(4526):1246-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6272398" target="_blank"〉PubMed〈/a〉
    Keywords: Adenocarcinoma/analysis ; Bombesin/*analysis ; Carcinoma, Small Cell/*analysis ; Carcinoma, Squamous Cell/analysis ; Cell Line ; Humans ; Lung Neoplasms/*analysis ; Mesothelioma/analysis ; Peptides/*analysis
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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