Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    ISSN: 1741-0444
    Keywords: Automatic determination ; Cardiac output ; Exercise ; Impedance plethysmograph
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract A computer-based system has been developed that enables the continuous measurement of cardiac output at rest as well as during exercise. The respiratory and motion artefacts appearing in the first derivative of the transthoracic impedance change (dZ/dt) were eliminated by adopting an ensemble averaging technique. A sufficiently high correlation was observed between cardiac outputs determined by the impedance and CO2 rebreathing methods. The system may facilitate the physiological investigation of cardiac function during exercise.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1741-0444
    Keywords: Gas exchange ; Impedance plethysmography ; Microcomputer ; Online measurement ; Ventilation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract A microcomputer-based system for the breath-by-breath assessment of respiratory and metabolic function during exercise was developed. To minimise the load for subjects ventilation was measured by use of an impedance plethysmograph instead of a pneumotachograph. The computer calculated respiratory frequency, tidal volume, minute ventilation, end-tidal pO2 and pCO2, O2 input and CO2 output, and gas exchange ratio of each breath from the impedance pneumogram and the gas composition of the expired air. To avoid the error due to the cardiogenic oscillations appearing to overlap the impedance pneumogram, discrimination of the inspiratory and expiratory phases was achieved by detecting the temperature difference between ambient and expired air. The impedance pneumogram could follow tidal volume variations during a moderate bicycle exercise (120 W) with satisfactory accuracy, but its sensitivity is apt to fall at the severe exercise (180 W). Possible factors causing errors such as the distribution of regional ventilation and perfusion during exercise are discussed.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Используя Импульсный Анализ Скоростей Поверхностных Реакций совместно с ИК спектрометрией безэмиссионного диффузного отразения, было найдено, что более низкое смещение валентных колебаний C−O адсорбированной CO — вызванное добавлением щелогного карбоната к Ru/Al2O3 —приводит к уменьшению константы скорости процесса диссоциации связи C−O адсорбированной CO в конверсии окиси углерода в метан.
    Notes: Abstract By using PSRA (Pulse Surface Reaction Rate Analysis) coupled with EDR (Emissionless Diffuse Reflectance Infrared Spectrometer), it was found that the lower shift of C−O stretching vibration of absorbed CO — caused by the addition of alkali carbonate to Ru/Al2O3 — leads to a decrease in the rate constant for the C−O dond dissociation process of adsorbed CO in methanation.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1436-2813
    Keywords: retained stones ; recurrent stones ; intrahepatic stones ; reoperation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract From 1965 to 1980, reoperations for residual or recurrent stones were performed on 78 out of 962 Japanese patients with cholelithiasis. The majority of patients who required reoperation had intrahepatic stones. Most of the causes of reoperation were residual stones due to incomplete removal or the non-detection of intrahepatic stones at the previous surgery. Very careful examination of the intrahepatic biliary trees should be done in patients with biliary tract diseases, because in many, the first operation was done during their youth. To remove the intrahepatic calculi completely, hepatic lobectomy should be considered as a final procedure. The causes of reoperation of common duct stones were residual in 60 per cent and recurrent in 40 per cent. Definitive surgery should be done at the first or at least the second operation to avoid irreversible hepatic disorders which have untoward effects on the prognosis. It is important not only to remove the stones but also to relieve the bile stasis in the biliary tract.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 5
    ISSN: 1436-2813
    Keywords: leiomyosarcoma ; lesser sac
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A case of leiomyosarcoma arising in the lesser sac in a 64-year-old man is presented. A second operation was required because of local recurrence 6 years following the first operation. A review of the literature revealed that only eight cases of leiomyosarcoma arising in the lesser sac, including our case, were reported. Almost all of these patients had symptoms of abdominal pain or distension. The tumor tended to grow to a large size and about 90 percent were over 10 cm in the maximal diameter. The prognosis of these series was poor and our own patient seems to be the second 5 year survivor.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 6
    ISSN: 1436-2813
    Keywords: malignant duodenocolic fistula ; pancreatoduodenectomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A 63 year-old woman with a malignant duodenocolic fistula of colonic origin was so diagnosed following radiological examination. She had symptoms of feculant vomitus, persistent diarrhea and emaciation. Following preoperative treatment of the nutritional and electrolyte disorders with intravenous hyperalimentation, a one-staged right hemicolectomy and pancreatoduodenectomy was performed successfully. We emphasized that an en-bloc removal of all the possibly involved structures is the most successful procedure for malignant duodenocolic fistula of colonic origin.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 7
    ISSN: 1436-2813
    Keywords: paraplegia ; spinal cord injury ; aortic cross-clamping ; cerebrospinal fluid pressure ; somatosensory evoked potentials
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Paraplegia has been a devastating and unpredictable complication following surgical procedures involving temporary occlusion of the thoracic aorta. This study was undertaken to determine the effect of the pressure gradient between the aortic pressure distal to the occluding aortic clamp and cerebrospinal fluid pressure, defined as “Relative spinal cord perfusion pressure” (RSPP) on the development of the ischemic spinal cord injury. In twelve mongrel dogs, the thoracic aorta just distal to the left subclavian artery was cross-clamped. Somatosensory evoked potentials (SEP) were generated by peripheral stimulation of the bilateral peroneal nerves. After complete loss of SEP was evident, six dogs, Group 1, were subjected to occlusion of the descending thoracic aorta for a period of 20 minutes with maintenance of 0 mmHg of RSPP, by an injection of normal saline into the subarachnoid space. Six other dogs, Group 2, likewise underwent 40 minutes of aortic occlusion, keeping the RSPP at 15 mmHg by withdrawal ofcerebrospinal fluid. All the dogs in Group 1 developed paraplegia, whereas all the dogs in Group 2 demonstrated complete postoperative recovery without any neurological sequelae. Thus, RSPP is a most important factor in the development of the ischemic spinal cord injury during the temporary thoracic aortic occlusion.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Polymer bulletin 6 (1981), S. 163-168 
    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 This paper describes a blending agent N-acetylpolyethylenimine(AcPEI) for polyamide fiber. Two types of AcPEI were examined; the branched one which was the acetylated product of commercial polyethylenimine(PEI) and the linear one prepared by the ring-opening polymerization of 2-methyl-2-oxazoline. Polyamide fibers(nylon 6) blended with a 2–10 wt % ratio of AcPEI were prepared by the melt-spinning technic. The processability of spinning was very high because and were very compatible with polyamide. In addition, the polyblend fibers obtained displayed good antistatic and dyeing properties, in which containing tertiary amino groups was more effective than . The mechanical properties were also disccussed.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 9
    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 This paper describes a group of anti-electrostatic agents 1 for polyamide fiber(Nylon 6). Agents 1 are calcium imidazolinium-carboxylates having poly(oxyethylene) chain and long alkyl group (C11H23 and C17H35). Eight derivatives of 1 were prepared by a four-step one-pot synthesis shown in Scheme 1. Nylon 6 fibers and films containing some of 1 (1.0 and 2.0 wt%) show improved anti-electrostatic property. The performance of 1 was increased by the increase of the length of poly(oxyethylene) chain.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 10
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...