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  • 11
    ISSN: 1436-0691
    Keywords: acute obstructive suppurative cholangitis ; elderly patients ; diagnosis ; complications ; biliary drainage
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Elderly patients with acute obstructive suppurative cholangitis (AOSC) have a very poor prognosis due both to the gradual development of symptoms and to acute exacerbation, resulting in a condition that is both severe and irreversible. In this study, we evaluated the clinical characteristics and effects of biliary drainage in patients with AOSC treated in our department, with special attention being focused on patients aged 70 years or more. Of 21 patients with AOSC, 7 (33.3%) were more than 70 years of age. All 7 had choledocholithiasis. In all patients with choledocholithiasis, in this study. AOSC was observed in 23.3% of those who were more than 70 years of age (7/30). In elderly patients with AOSC, typical symptoms are often absent, and the severity of the disease is difficult to determine based on the results of examination alone. Since early diagnosis of AOSC and appropriate biliary drainage from the onset of AOSC are extremely important, clinical findings should be examined with the utmost care.
    Type of Medium: Electronic Resource
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  • 12
    ISSN: 1436-0691
    Keywords: bacterial translocation ; liver resection ; isolated enterocytes ; protein synthesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract After major liver resection, bacterial infectious complications, including sepsis and endotoxemia, can be at least in part, attributed to translocation of enteric bacteria and endotoxin. We evaluated the effectiveness of the enteral and parenteral administration of branched-chain amino acids (BCAA) in preventing bacterial translocation after 70% liver resection in rats with thioacetamide-induced-cirrhosis. Bacterial translocation after hepatectomy was induced by a disturbance of protein metabolism in intestinal epithelial cells. However, the administration of BCAA, particularly via the enteral route, improved amino acid metabolism in the gut and stimulated the synthesis of nonsecreted protein and the proliferation of crypt cells, thereby preventing bacterial translocation after liver resection. Improvement in this cascade of metabolic reactions is believed to have been responsible for the improved outcome after extensive resection of the cirrhotic liver.
    Type of Medium: Electronic Resource
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  • 13
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 309-311 (May 2006), p. 667-670 
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Particulate layers of hydroxyapatite were deposited on the inner and outer surfaces of porous poly(L-lactic acid) monolith, PLLA, by using enzymatically derived ammonia as the precipitant. PLLA specimens were surface-modified with urease and were impregnated with aqueous solutions containing Ca2+, PO43- and urea. As ammonia was produced by hydrolysis of urea with the aid of the urease, hydroxyapatite precipitated predominantly on the surfaces of the porousPLLA. In contrast to the conventional biomimetic method or the alternate soaking method, it took shorter time period for hydroxyapatite particles to cover the surfaces of PLLA. The resultant hydroxyapatite was proved to be bone-like apatite because it had low crystallinity, contained carbonate ion in the lattice, and had a calcium-deficient composition
    Type of Medium: Electronic Resource
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  • 14
    ISSN: 1432-1912
    Keywords: Chromaffin cell ; l-[3H]Nicotine ; Nicotinic acetylcholine receptor ; Binding assay
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary To characterize the properties of nicotinic acetylcholine receptors (nAChRs) in autonomic ganglia, we examined l-[3H]nicotine binding to membrane fraction prepared from cultured bovine adrenal chromaffin cells, using a modified filtration method. Binding of l-[3H]nicotine to non-treated glass fiber filters interfered with the detection of specific binding to the membrane fraction. Presoaking glass fiber filters in 3% or higher concentrations of polyethyleneimine (PEI) solution (sixty times higher than earlier used concentration) for at least 5 h could reduce the binding of l-[3H]nicotine to the filters to the background level. Specific l-[3H]nicotine binding to the membrane fraction was detected only when the membrane fraction was prepared in Ca2+- and Mg2+ (EDTA, EGTA and protease inhibitors were added)-free buffer. Specific binding of l-[3H]nicotine was saturable and reversible. Both computer program and Scatchard analysis revealed a single class of high affinity binding sites with an average Kd of 8.9 nM and a Bmax of 42.5 fmol/mg protein. The Hill coefficient was 0.98. In inhibition studies, both cholinergic agonists (carbachol and l-nicotine) and ganglionic agonists (lobeline and 1,1-dimethyl-4-phenylpiperazinium iodide) were much effective in inhibiting l-[3H]nicotine binding, whereas both neuromuscular blocking (α-bungarotoxin and d-tubocurarine) and ganglionic blocking agents were less effective. These results suggest that high affinity nicotinic binding sites on adrenal chromaffin cells are nAChRs of the ganglion-type, which have properties different from nAChRs on the neuromuscular junction but similar to nAChRs in the brain.
    Type of Medium: Electronic Resource
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  • 15
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 45 (1993), S. 391-400 
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: An improved unrestricted Hartree-Fock (UHF) crystal orbital method for infinite one-dimensional systems having antiferromagnetic spin array is presented. This variational version of the UHF method is composed of two steps of self-consistent-field (SCF) calculations. The second SCF equation is to be solved using the canonical transformation between specific crystal orbitals around the Fermi level of the first conventional SCF solution. The energy gain and the forbidden band gap (correlation gap) associated with the hypothetical antiferromagnetic state of trans-polyacetylene are examined as an example. © 1993 John Wiley & Sons, Inc.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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