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  • 1
    Electronic Resource
    Electronic Resource
    Kinetic study on propylene polymerization by a high activity catalyst system: MgCl2/TiCl4/PhCO2Et-AlEt3/PhCO2Et (1984)
    Springer
    Polymer bulletin 11 (1984), S. 479-484 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Kinetic study was performed in short time propylene polymerization with a high activity-high stereospecificity catalyst system composed of MgCl2/TiCl4/PhCO2Et with AlEt3/PhCO2Et. The concentration of the active centers, [C *], the propagation rate constant, k p, and the chain transfer rate, r tr, were determined. The change of these values by the change of polymerization conditions, the concentration of monomer, AlEt3, and the temperature, were studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00265491
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  • 2
    Electronic Resource
    Electronic Resource
    Polymerizations of α-olefins and styrene with MgCl2-supported titanium catalyst system: MgCl2/TiCl4/PhCO2Et with AlEt3PhCO2Et (1984)
    Springer
    Polymer bulletin 11 (1984), S. 485-489 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Kinetic analysis was performed in a short time polymerizations of 1-butene,4-methyl-1-pentene and styrene by using a catalyst system composed of MgCl2/TiCl4/PhCO2Et with AlEt3/PhCO2Et which is known as a highly active and highly stereospecific catalyst system in olefin polymerization. The concentration of the active centers, [C *], the propagation rate constant, k p, and the chain transfer rate, r tr, were determined for each monomer. It was found that the values of [C *] were almost same for every monomer, but the values of k p changes widely in the following order: propylene〉1-butene〉4-methyl-1-pentene〉styrene.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00265492
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  • 3
    Electronic Resource
    Electronic Resource
    The bioelectronic factors of human body fluids and intravenous replacement solutions (1987)
    Springer
    Journal of anesthesia 1 (1987), S. 22-28 
    Details
    ISSN: 1438-8359
    Keywords: Bioelectronic factors ; Redox potential ; Body fluids ; Intravenous replacement solutions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In this paper the analytical method of the pH, rH2 and specific resistance of body fluids with B.E.-VINCENT Unit was described. From the values of the pH, rH2 and specific resistance, other three bioelectronic factors, the redox potential, milliampere and micro-watts, were calculated. With this technique the bioelectronic factors of arterial and venous blood and urine obtained from 20 young healthy adults were examined. Those of arterial and venous blood showed almost identical values. The urinary values of the pH, milliampere and microwatts varied as compared to those of blood. The bioelectronic factors of the various intravenous replacement solutions and blood components were considerably different from those of blood. It is considered that the bioelectronic factors of patient’s blood should be checked repeatedly and maintained in an appropriate state when massive fluid therapy is required. (Taniguchi S et al.: The bioelectronic factors of human body fluids and intravenous replacement solutions. J Anesth 1: 22–28, 1987)
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s0054070010022
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  • 4
    Electronic Resource
    Electronic Resource
    Contribution of arterial redox potential measurement to the care of critically ill patients (1987)
    Springer
    Journal of anesthesia 1 (1987), S. 125-131 
    Details
    ISSN: 1438-8359
    Keywords: Redox potential ; Multiple organ system failure ; Acid-base balance ; Lactate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract 175 arterial and 122 urinary samples from 20 patients admitted in ICU for organ system failure (OSF) were analysed. Besides arterial blood gases and lactate, electrolyte concentrations, pH, rH2 and specific resistance (R) in blood and urine were measured. Redox potential (E) and base excess were calculated from these data. Patients were defined as having MOSF if their organ systems met failure criteria during their ICU stay. Data were classified with corresponding number of OSF developed in the patients when samples were obtained. Acid-base balance or base excess alone could not be used to predict the severity of illness as assessed by increasing number of organ system failures. Significant elevations in blood lactate concentrations were observed only in patients with four, five or six OSF. A lack of correlation between blood lactate and severity of OSF indicates that blood lactate is not valid as a guide to ultimate outcome of the patients. Arterial redox potentials progressively decreased with increasing number of OSF, therefore, it can be stated that the serial measurements of arterial redox potential are useful in assessing the patient’s status or predicting their ultimate outcome. (Taniguchi S, Kodama K, Matsuyama H et al.: Contribution of arterial redox potential measurement to the care of critically ill patients. J Aesth 1: 125–131, 1987)
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s0054070010125
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  • 5
    Electronic Resource
    Electronic Resource
    The hemodynamic and metabolic changes in prostaglandin E1-induced hypotension in dogs (1989)
    Springer
    Journal of anesthesia 3 (1989), S. 210-217 
    Details
    ISSN: 1438-8359
    Keywords: PGE1-induced hypotension ; Hemodynamic effects of PGE1 ; Metabolic effects of PGE1
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The hemodynamic and metabolic changes in hypotensive state induced with prostaglandin E1 (PGE1) or trimetaphan (TMT) infusion were investigated in dogs. Mean arterial pressure was decreased by about 50% with 1.58 µg/kg/min of PGE1 or 45 µg/kg/min of TMT. Heart rate, pulmonary capillary wedge pressure and central venous pressure remained virtually unchanged in the two groups. Cardiac output was well maintained in PGE1 group, whereas cardiac output showed the tendency to decline in TMT group. Greater reduction in systemic vascular resistance was seen in PGE1 group than in TMT group. Pulmonary vascular resistance showed no significant change in PGE1 group, whereas it increased significantly in TMT group. Gradual decreases in arterial pH, PaO 2 and base excess and slight but significant increase in PaCO 2 was observed in PGE1 group, and these abnormalities recovered 30 min after hypotension. Abnormalities in blood gases and acid-base balance were considerably more severe and prolonged in TMT group compared with those in PGE1 group. Blood lactate and pyruvate concentrations showed no significant changes in PGE1 group, whereas substantial elevation was seen in L/P ratio especially 30 min after induction of hypotension in TMT group. Oxygen consumption showed minimal changes in PGE1 group, whereas a significant decrease was observed in TMT group. The conclusions derived from these results are as follows; 1) PGE1 maintained cardiac output better than TMT, probably because of its direct inotropic action on the heart, and of its greater reduction of systemic vascular resistance than TMT. 2) PGE1 seemed to provide the better blood perfusion throughout the body than TMT. 3) PGE1 showed less possibility to produce the metabolic derangement compared with TMT. (Nam YT, Takahashi S, Tominaga M et al.: The hemodynamic and metabolic changes in prostaglandin E1-induced hypotension. J Anesth 3: 210–217, 1989)
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s0054090030210
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  • 6
    Electronic Resource
    Electronic Resource
    Increased release of alpha-atrial natriuretic peptide during controlled mechanical ventilation with positive end-expiratory pressure in humans (1988)
    Springer
    Journal of anesthesia 2 (1988), S. 119-123 
    Details
    ISSN: 1438-8359
    Keywords: Controlled mechanical ventilation ; Alpha-atrial natriuretic peptide ; PEEP (positive end-expiratory pressure) ; Diuresis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The objective of this study was to test the hypothesis that a release of alpha-artrial natriuretic peptide (ANP) is depressed resulting in the reduction of urinary output in patients receiving controlled mechanical ventilation (CMV) with positive end-expiratory pressure (PEEP). Five normovolemic patients with no apparent cardiac, renal, endocrine, or pulmonary dysfunctions were included in this study. After the patients were mechanically ventilated using a volumecycled ventilator with zero cmH2O PEEP for one hour, hemodynamic variables were measured. Urine and blood samples were collected after the measurements. Plasma alpha-ANP levels were determined on blood samples taken from radial artery using specific radioimmunoassay. Then PEEP levels were changed to 5, 10, 15 and, finally, 0 cmH2O in four consecutive one-hour periods. At the end of each period, the measurements and collection of the samples were repeated. With increasing levels of PEEP, central venous pressure (CVP), pulmonary artery wedge pressure (PAWP), and heart rate were pressure-dependently increased. On the other hand, cardiac output and urinary output were decreased. Plasma levels of alpha-ANP were also increased by the institution of PEEP. These changes occurred in a pressure-dependent fashion. Urinary sodium excretion, potassium excretion, fractional excretion of sodium and free water clearance remained unchanged. It is concluded that a release of alpha-ANP was augmented rather than depressed with PEEP. This suggests that a decrease in urinary excretion in patients with PEEP may not be due to a reduced release of alpha-ANP. (Sata T, Yoshitake J: Increased release of alpha-atrial natriuretic peptide during controlled mechanical ventilation with positive end-expiratory pressure in humans. J Anesth 2: 119–123, 1988)
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s0054080020119
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  • 7
    Electronic Resource
    Electronic Resource
    Venodilator effects of adenosine triphosphate and sodium nitroprusside; comparisons during controlled hypotension (1987)
    Springer
    Journal of anesthesia 1 (1987), S. 143-147 
    Details
    ISSN: 1438-8359
    Keywords: Induced hypotension ; Mean circulatory filling pressure ; Adenosine triphosphate ; Sodium nitroprusside ; Vein
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Adenosine triphosphate as well as sodium nitroprusside has been used for hypotensive anesthesia. The purpose of this study was to examine the possibility that two hypotensive drugs may exert different effects on venous capacitance during controlled hypotension. In rats anesthetized with ketamine, mean arterial pressure was lowered to 50 mmHg by intravenous infusion of adenosine triphosphate or sodium nitroprusside. Venous capacitance was assessed before and during induced hypotension by measuring the mean circulatory filling pressure (MCFP). MCFP was measured after briefly arresting the circulation by inflating an indwelling balloon in the right atrium. MCFP was lower during adenosine triphosphate-induced as well as sodium nitroprusside-induced hypotension as compared with the respective value at control (P 〈 0.01 for adenosine triphosphate and sodium nitroprusside). However, the decrease in MCFP by adenosine triphosphate (0.8 ± 0.1 mmHg) was less (P 〈 0.01) than that by sodium nitroprusside (2.3 ± 0.3 mmHg). These results suggest that at a comparable level of arterial hypotension venodilator effect of adenosine triphosphate was less than that of sodium nitroprusside. Less venodilatation during adenosine triphosphate-induced hypotension may contribute to the maintenance of cardiac output during hypotensive anesthesia. (Hoka S, Takeshita A, Aishima K et al.: Venodilator effects of adenosine triphosphate and sodium nitroprusside; comparisons during controlled hypotension. J Anesth 1: 144–147, 1987)
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s0054070010143
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  • 8
    Electronic Resource
    Electronic Resource
    Successful weaning from prolonged mechanical ventilation by embolization of aorta-pulmonary collateral arteries (1990)
    Springer
    Journal of anesthesia 4 (1990), S. 282-284 
    Details
    ISSN: 1438-8359
    Keywords: Weaning ; Mechanical ventilation ; Transcatheter embolization ; Collateral arteries ; Tetralogy of Fallot
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s0054000040282
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  • 9
    Electronic Resource
    Electronic Resource
    Retrospective study of post-anesthetic mild liver disorder associated with inhalation anesthetics, halothane and enflurane (1992)
    Springer
    Journal of anesthesia 6 (1992), S. 183-191 
    Details
    ISSN: 1438-8359
    Keywords: Anesthetics ; Volatile ; Halothane ; Enflurane ; Liver ; Hepatitis ; Drug toxicity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The incidence of post-anesthetic mild liver disorder (PAMLD) was compared between 928 patients administered halothane and 1766 patients administered enflurane. They were selected from 19 504 surgical patients administered general anesthesia at Kyushu University Hospital over the past 6 years and 4 months. They had had normal liver function before operation and had no history of blood transfusion. Alanine aminotransferase (ALT) levels exceeding 70 IU·l −1 within 180 days after operation were found in 226 patients in the halothane group (24.4%), and in 250 patients in the enflurane group (14.2%) (P ≪ 0.01). Both maximum ALT levels and duration of ALT elevation were higher and longer in the halothane group (P ≪ 0.01). These results suggest that, not only in the development of fulminant hepatitis but also in PAMLD, enflurane is less hepatotoxic than halothane. (Sakaguchi Y, Inaba S, Umeki Y, et al.: Retrospective study of post-anesthetic mild liver disorder associated with inhalation anesthetics, halothane and enflurane. J Anesth 6: 183–191, 1992)
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s0054020060183
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  • 10
    Electronic Resource
    Electronic Resource
    Rationale for preoperative screening of anti-HCV antibody (1993)
    Springer
    Journal of anesthesia 7 (1993), S. 27-32 
    Details
    ISSN: 1438-8359
    Keywords: Anti-HCV antibody ; HCV ; Needle-stick injury ; Blood-borne pathogen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We investigated the incidence of the anti-HCV antibody and associated factors in 1,031 surgical patients who had received blood transfusion during or after operation from October 1988 to April 1991, at Kyushu University Hospital. One hundred fifteen patients (11.2%) were anti-HCV positive. Sixty of the 219 patients (27.%) with a history of transfusion were positive, as were 55 of 812 (6.8%) without it. Patients aged under 40 showed a 0.6% positive rate (1 of 175) as did 8.5% (54 of 637) of those 40 and over in the no transfusion history group. Among the 637 patients without transfusion histories and aged over 40, patients with preoperative maximum ALT value over 36 IU·l −1 had significantly higher positivity (16.0%, 29/181) than those with ALT values less than 35 IU·l −1 (5.5%, 25/456, P ≪ 0.01). The incidence of anti-HCV antibody in preoperative surgical patients in our hospital is ten times higher than that of donors. Anti-HCV are associated with transfusion, age, and liver dysfunction. Operating room personnel are at high risk because of contact with many HCV carrier patients. (Sakaguchi Y, Inaba S, Yoshitake J: Rationale for preoperative screening of anti-HCV antibody. J Anesth 7: 27–32, 1993)
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s0054030070027
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