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  • 11
    Electronic Resource
    Electronic Resource
    Angiomyolipoma of the liver: significance of CT and MR dynamic study (1998)
    Springer
    Abdominal imaging 23 (1998), S. 520-526 
    Details
    ISSN: 1432-0509
    Keywords: Key words: Angiomyolipoma—Liver, US, CT, MRI, angiography.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Angiomyolipoma is a benign mesenchymal tumor that has been reported frequently in the kidney but rarely in the liver. In the present study, we present four cases of hepatic angiomyolipoma with different radiologic appearances, discuss differential diagnosis, and review previously reported cases. One of our cases was followed for 8 years. Computed tomography (plain, enhanced, and dynamic study), magnetic resonance imaging (T1-weighted spin echo, T2-weighted spin echo, and dynamic study), ultrasonography, and angiography were performed in all cases. Although different radiologic appearances were observed in the tumors, based on different proportions of fat, blood vessels, and muscle, three cases were diagnosed as angiomyolipoma. In one case, it was quite difficult to make radiologic diagnosis; hepatocellular carcinoma with fatty metamorphosis in part was most likely suspected, but histopathological examination revealed angiomyolipoma with few fat elements. In the present study, early and prolonged enhancement of the lesion with the special pattern of time density/intensity curve was significant for angiomyolipoma, and we suggest that preoperative radiologic diagnosis of the lesion is possible in most of the cases. However, it can be quite difficult to distinguish angiomyolipoma from some hepatocellular carcinomas with fatty metamorphosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002619900391
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  • 12
    Electronic Resource
    Electronic Resource
    Existence of an α-chymotrypsin-like immunoreactivity in bovine mast cells (1982)
    Springer
    Cellular and molecular life sciences 38 (1982), S. 277-278 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Using an indirect fluorescent antibody technique, we detected an α-chymotrypsin-like immunoreactivity, but no trypsin-like immunoreactivity in bovine mast cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01945111
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  • 13
    Electronic Resource
    Electronic Resource
    A new, rapid and precise method for measuring the intra-cellular water content by gas chromatography and3H-sucrose (1981)
    Springer
    Cellular and molecular life sciences 37 (1981), S. 748-750 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A new rapid method for measuring intra-cellular water content by gas chromatography and an isotopic (3H-sucrose) technique is described. Water content of circulating red cells was revealed to be 71.26±0.31%. Intra-cellular water content increased to 102.9% of its original value following addition of 3 volumes of acid-citrate-dextrose (ACD) to 20 volumes of blood.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01967959
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  • 14
    Electronic Resource
    Electronic Resource
    Phylogenetic relationships among species of Calyptogena (Bivalvia: Vesicomyidae) collected around Japan revealed by nucleotide sequences of mitochondrial genes (1995)
    Springer
    Marine biology 122 (1995), S. 401-407 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Phylogenetic relationships among the seven species of deep-sea giant clams Calyptogena (Bivalvia: Vesicomyidae) collected around Japan were examined using parts of nucleotide sequences of mitochondrial genes for cytochrome oxidase I (COI) and cytochrome oxidase III (COIII) and the encoded amino acid sequences. The seven species were C. soyoae (Sagami Bay), C. fausta (Suruga Bay), C. kaikoi (Nankai Trough), C. nautilei (Nankai Trough), C. phaseoliformis (Japan Trench), C. solidissima (Minami-Ensei Knoll, Okinawa Trough) and Calyptogena sp. (Iheya Ridge, Okinawa Trough). A clear phylogenetic split was observed between one group of three species (C. kaikoi, C. phaseoliformis and C. fausta) and the remaining species. This clustering corresponds to the two previously described subgenera within the genus Calyptogena (Calyptogean and Ectenagena) with the exception of the placement of C. nautilei, which had been placed in the subgenus Ectenagena. Genetic distances between two haplotypes of C. soyoae were 0.043 for the COI region and 0.055 for the COIII region, and three amino acid substitutions were detected with the COIII region. Calyptogena sp. from the Iheya Ridge could be distinguished from one of the two haplotypes (type A) of C. soyoae by only a single nucleotide substitution, a result that suggests that Calyptogena sp. of the Iheya Ridge diverged from C. soyoae after the two haplotypes had diverged, and it is now isolated from C. soyoae in Sagami Bay.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00350872
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  • 15
    Electronic Resource
    Electronic Resource
    Genetic relationships of pilchards (genus: Sardinops) with anti-tropical distributions (1996)
    Springer
    Marine biology 126 (1996), S. 585-590 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The pilchards (genus Sardinops), one of the major components of the world's harvest of fishes, is distributed sporadically in the temperate zone on a global scale. Mitochondrial DNA variation in 95 pilchards from nine worldwide localities in five current systems was examined using ten restriction enzymes. Although several opinions have been proposed on the global population structure of the genus Sardinops, our results clearly rejected the hypothesis of gene flow among geographically distant populations on a global scale. Results indicate that the Japanese pilchards and the Australian and South African pilchards were derived from the eastern Pacific populations, following the speciation of Sardinops in the Pacific, after the formation of the Isthmus of Panama. An intermixing of the northeastern and southeastern Pacific populations during the Pleistocene glacial maxima is suggested from their genetic affinities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00351325
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  • 16
    Electronic Resource
    Electronic Resource
    Cure of a man with solitary abscess of the brain-stem (1990)
    Springer
    Journal of neurology 237 (1990), S. 265-266 
    Details
    ISSN: 1432-1459
    Keywords: Brain-stem abscess ; Antibiotics ; Stereotactic aspiration ; Magnetic resonance imaging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A 25-year-old man with lung abscess and signs of an abscess in the rostral brain-stem was cured by large doses of antibiotics and stereotactic aspiration of the abscess.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00314632
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  • 17
    Electronic Resource
    Electronic Resource
    Mechanism of acute lung injury caused by inhalation of fabric protector and the effect of surfactant replacement (1998)
    Springer
    Intensive care medicine 24 (1998), S. 55-60 
    Details
    ISSN: 1432-1238
    Keywords: Key words Acute lung injury ; Blood gas ; Fabric protector ; Inhalation ; Pulmonary surfactant ; Surface tension
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective: To evaluate the role of surfactant in the mechanism and treatment of acute lung injury caused by inhalation of fabric protector. Design: Prospective, randomized study. Setting: University laboratory. Interventions: In vitro experiment: a porcine surfactant suspension (10 mg · ml−1) was exposed to a fabric protector aerosolized with an ultrasonic nebulizer for 1 min. Minimum surface tension (γ min) was sequentially measured using pulsating bubble equipment. Animal experiment: 14 adult rats were anesthetized with pentobarbital and mechanically ventilated with pure oxygen. Then, all rats inhaled fabric protector aerosolized with the nebulizer for five breaths. Three hours after inhalation, the rats were randomly assigned to two groups: a surfactant group (n = 7), in which surfactant (100 mg · kg−1) was replaced, and a control group (n = 7), in which no substance was given. Measurements and results: In vitro experiment: exposure to fabric protector aerosol increased the mean γ min of the surfactant from 1.7 to 19.2 mN · m−1 (n = 5, p 〈 0.05). Animal experiment: the mean partial pressure of oxygen in arterial blood (PaO2) in all rats decreased from 62.8 to 17.1 kPa at 3 h after inhalation. The PaO2 in the surfactant group increased to 49.8 ± 11.1 (SD) kPa at 30 min after surfactant replacement (p 〈 0.05), while the PaO2 in the control group remained below 20 kPa. Conclusions: Impairment of surfactant is a factor involved in the development of acute lung injury caused by inhalation of fabric protector. Surfactant replacement may be therapeutic for such injuries.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001340050515
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  • 18
    Electronic Resource
    Electronic Resource
    A new cultivation method of fungi or mycelia (1988)
    Springer
    Bioprocess and biosystems engineering 3 (1988), S. 63-68 
    Details
    ISSN: 1432-0797
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract The conventional penicillin submerged culture has several drawbacks: filamentous fungi solidify into pellets or become pulpy, which has so far had bad effects on the separation of penicillin from the broth, on the monitoring and controlling of the culture system as well as on the productivity of penicillin. By using polyurethane foams as a carrier for the fungi Penicillium chrysogenum, the authors have studied a novel cultivation method for this microorganism. The following results were obtained: 1. The effect of urethane foams on the growth characteristics of Penicillium chrysogenum was studied. It was found that the microorganism crept into the carrier, then formed a biofilm of 0.45 mm in thickness on the surface layer of the carrier. 2. The use of urethane foams had the effect of improving not only the mass transfer rates of various nutrients, but also that of oxygen in the culture system. Six times as much penicillin could be produced as is obtainable by traditional cultivation methods. 3. An operational strategy for the addition of polyurethane Toams to the culture medium could be developed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00369329
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  • 19
    Electronic Resource
    Electronic Resource
    Study of pulsed laser deposition of RuO2 and SrRuO3 thin films (1999)
    Springer
    Applied physics 69 (1999), S. S587 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 81.15.Fg; 73.61.-r; 77.22.Ch
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract. In this study, the pulsed laser ablation of RuO2 and SrRuO3 (SRO) is investigated by observing the fluorescence from excited atoms in the plume by using a framing streak camera. Vaporization, phase explosion and boiling are suggested to play the main roles in the processes for the interaction between the laser beam and target. Collisions and adiabatic expansion are also suggested before particles move forward with shifted Maxwellian spatial distribution. In O2 pressure, numerous collisions between fast and slow atoms occur and result in the exchange of speeds. The structural and electrical (conductivity and work-function) properties of RuO2 and SRO thin films are measured. Epitaxial SRO growth was obtained at growth temperatures down to 350 °C. Ferroelectric and high- dielectric thin-film capacitors with RuO2 or SRO thin film electrode are also studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003390051481
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  • 20
    Electronic Resource
    Electronic Resource
    Ultrafast optical response in polydiacetylenes and polythiophenes (1991)
    Springer
    Applied physics 53 (1991), S. 296-307 
    Details
    ISSN: 1432-0649
    Keywords: 42.62.−k ; 71.35.+z ; 78.65.Jd
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Ultrafast optical response in the films of poly(3-dodecylthiophene) (P3DT) and blue-and red-phase polydiacetylenes (PDA-4BCMU) has been investigated by femtosecond absorption and picosecond luminescence spectroscopies. Several nonlinear optical processes, i.e., hole burning, Raman gain, inverse Raman scattering, and induced-frequency shift, have been observed. The relaxation processes from photoexcited free excitons to self-trapped excitons (STEs) has been observed. The time constant is estimated as 140±40 fs in the blue-phase PDA-4BCMU and 100±50 fs in P3DT. The generated unthermalized STEs thermalize with the time constant of about 1 ps. The STEs in the blue-phase PDA-4BCMU decay exponentially with lifetime of 1.6±0.1 ps at 290 K and 2.1±0.2 ps at 10 K. The decay curves in the red-phase PDA-4BCMU and P3DT are not single exponential but can be fitted to biexponential functions with time constants of slightly shorter than 1 ps and about 5 ps. These two decay time constants correspond to relaxations to the ground state, respectively, from the free exciton and unthermalized STE and from the thermalized STE.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00331817
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