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  • 1
    Electronic Resource
    Electronic Resource
    Influences of a high excitation frequency (70 MHz) in the glow discharge technique on the process plasma and the properties of hydrogenated amorphous silicon (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 71 (1992), S. 5665-5674 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Hydrogenated amorphous silicon has been prepared at a plasma excitation frequency in the very-high-frequency band at 70 MHz with the glow discharge technique at substrate temperatures between 280 and 50 °C. The structural properties have been studied using hydrogen evolution, elastic recoil detection analysis, and infrared spectroscopy. The films were further characterized by dark and photoconductivity and by photothermal deflection spectroscopy. With respect to films prepared at the conventional frequency of 13.56 MHz considerable differences concerning the electronic and structural properties are observed as the substrate temperature is decreased from 280 to 50 °C. Down to a substrate temperature of 150 °C the electronic film properties change only a little and the total hydrogen content cH and the degree of microstructure that can be directly correlated to cH increase only moderately. Below 150 °C the electronic properties deteriorate in the usual manner but still the total hydrogen content does not exceed 21 at. % even at a substrate temperature of 50 °C. It is argued that the influence of the higher excitation frequency on the plasma and on the growth kinetics plays a key role in this context by allowing a highly effective dissociation of the process gas with the maximum ion energies remaining at low levels. It is concluded that deposition processes at higher excitation frequencies can have important technological implications by allowing a decrease of the deposition temperature without losses in the material quality.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.350500
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  • 2
    Electronic Resource
    Electronic Resource
    Tm3+-related emissions in III-V semiconductors grown by metalorganic vapor phase epitaxy (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 61 (1992), S. 560-562 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Layers of InP:Tm, GaAs:Tm, GaP:Tm, and GaInP:Tm have been grown by metal-organic vapor phase epitaxy at atmospheric pressure using tris(isopropylcyclopentadienyl)thulium as a liquid Tm source. Electrical measurements revealed no characteristic influence of Tm on the electrical properties of the semiconductor host. Tm3+-related 4f emissions at 1.2 and 1.9 μm are observed both in GaAs and GaInP. In GaAs, the Tm3+ 4f luminescence at 1.2 μm consists of a series of very sharp lines. In GaInP samples, the Tm3+-related luminescence at 1.2 μm is much stronger than in the GaAs samples and is still observable at room temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.107836
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  • 3
    Electronic Resource
    Electronic Resource
    Conformational dependence of .beta. hyperfine coupling constants in the nitroxide series (1992)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 96 (1992), S. 10779-10784 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100205a035
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  • 4
    Electronic Resource
    Electronic Resource
    Linkage of an important gene locus for tuberous sclerosis to a chromosome 16 marker for polycystic kidney disease (1992)
    [s.l.] : Nature Publishing Group
    Nature genetics 2 (1992), S. 37-41 
    Details
    ISSN: 1546-1718
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] Tuberous sclerosis complex (TSC) is an autosomal dominant disorder of unknown aetiology that affects numerous body systems including skin, brain and kidneys. Some TSC has been linked to chromosome 9, additional TSC genes on chromosomes 11 and 12 have been proposed, but the majority of TSC families ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/ng0992-37
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  • 5
    Electronic Resource
    Electronic Resource
    Relationship between clinical symptoms of anal incontinence and the results of anorectal manometry (1992)
    Springer
    Diseases of the colon & rectum 35 (1992), S. 847-849 
    Details
    ISSN: 1530-0358
    Keywords: Anal incontinence ; Clinical presentation ; Anal motility ; Anorectal manometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The aim of this work was to analyze clinical symptoms in light of anorectal manometry results. We compared the frequency of clinical symptoms in relation with the presence or absence of functional anomalies. Using this methodology, the following relationships may be suggested: the need to wear a pad, with a decreased resting pressure at the upper part of the anal canal; the inability to delay rectal evacuation, with decreased anal voluntary contraction; interference of incontinence with social activities, with decreased duration of anal voluntary contraction; urinary symptoms, with an increased threshold volume of rectal distention needed to elicit the rectoanal inhibitory reflex; and complete rectal prolapse, with reduced length of the anal canal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02047871
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  • 6
    Electronic Resource
    Electronic Resource
    Pathways for oxidative fuel provision to working muscles: Ecological consequences of maximal supply limitations (1992)
    Springer
    Cellular and molecular life sciences 48 (1992), S. 557-564 
    Details
    ISSN: 1420-9071
    Keywords: Metabolic substrates ; aerobic capacity ; regulation ; glucose ; lactate ; fatty acid ; migration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The study of metabolic fuel provision and its regulation has reached an exciting stage where specific molecular events can be correlated with parameters of the organism's ecology. This paper examines substrate supply pathways from storage sites to locomotory muscle mitochondria and discusses ecological implications of the limits for maximal flux through these pathways. The relative importance of the different oxidative fuels is shown to depend on aerobic capacity. Very aerobic, endurance-adapted animals such as long distance migrants favor the use of lipids and intramuscular fuels over carbohydrates and circulatory fuels. The hypothesis of functional co-adaptation between oxygen and metabolic fuel supply systems allows us to predict that the capacity of several biochemical processes should be scaled with maximal oxygen consumption. Key enzymes, transmembrane transporter proteins, glucose precursor supply and soluble fatty acid transport proteins must all be geared to support higher maximal glucose and fatty acid fluxes in aerobic than in sedentary species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01920239
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  • 7
    Electronic Resource
    Electronic Resource
    Intraductal shock-wave lithotripsy in complicated common bile duct stones (1992)
    Springer
    Journal of molecular medicine 70 (1992), S. 148-151 
    Details
    ISSN: 1432-1440
    Keywords: Complicated bile duct stones ; Cholangioscopy ; Intracorporeal shockwave lithotripsy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Intracorporeal shockwave lithotripsy was performed in 36 patients with problematic common bile duct stones. All of the patients had undergone unsuccessful mechanical lithotripsy prior to this procedure. In 29 patients (80.6%), the stones were fragmented under cholangioscopic control and subsequently extracted with a Dormia basket. In seven patients, the procedure failed due to stone impaction or failure to intubate the common bile duct with a nasobiliary tube. No complications were observed. Cholangioscopically guided intracorporeal shockwave lithotripsy is a highly effective and safe procedure for the conservative treatment of complicated common bile duct stones.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00227357
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  • 8
    Electronic Resource
    Electronic Resource
    New growth technique for luminescent layers on silicon (1992)
    Springer
    Applied physics 54 (1992), S. 567-569 
    Details
    ISSN: 1432-0630
    Keywords: 68.55−a ; 68.65+g ; 78.55−m
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract We report the growth of siloxene on crystalline silicon (111) surfaces based on the chemical transformation of a calcium disilicide layer. The siloxene films obtained show a prominent luminescence in the green, with intensities comparable to the luminescence observed from porous silicon. The structural properties of the siloxene films are studied with infrared transmission and TEM micrographs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00324341
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  • 9
    Electronic Resource
    Electronic Resource
    Automated percutaneous lumbar discectomy (APLD) — Method and 1-Year follow-up (1992)
    Springer
    European radiology 2 (1992), S. 292-298 
    Details
    ISSN: 1432-1084
    Keywords: Spine surgery ; Automated percutaneous discectomy ; Lumbar disc herniation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract From July 1989 to June 1991 135 discs on 129 patients were treated, in about twothirds at level L4/5 and at the remaining one third L5/S1.15% (n = 2) failed technically. Sixty eight patients are in the 1-year follow-up. Average age was 41 years (range 16–68 years). Average pain duration was 12 months, and average aspiration time was 25.8 min (range 15–45 min). All patients had contained disc lesions, suffered from radicular symptoms and had not responded to conservative treatment. 67,1% (group A, n =45) had a failure rate of 17,8%. Patients with associated degenerations (group B, n = 7) had a failure rate of 35,3%. 80% of the patients with recurrent radicular symptoms (group C, interval patients, n = 6) were free of symptoms. Re herniation rate in all patients was 2.9%, and the laminectomy rate 4.4%. No major complications were noted. Treated disc level, patient aage, aspirated nucleus material and CT changes revealed no correlation to clinical success. Patients with associated degenerations (group B) as wellas those with longer pain duration and larger contained disc lesions had a significantly worse outcome.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00175429
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  • 10
    Electronic Resource
    Electronic Resource
    Synaptic connections of central carotid sinus afferents in the nucleus of the tractus solitarius of the rat. I. An electron microscopic study (1992)
    Springer
    Journal of neurocytology 21 (1992), S. 137-147 
    Details
    ISSN: 1573-7381
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A transganglionic transport technique was used to study the synaptic connections of the central carotid sinus afferents in the nucleus of the tractus solitarius of the rat by electron microscopy. The caudal part of the nucleus was profusely innervated. Labelled fibres extended to the contralateral nucleus, and to the ipsilateral dorsal motor nucleus of the vagus nerve, nucleus ambiguus, spinal nucleus of the trigeminal nerve and the area postrema. The labelled terminals were densely packed with clear, predominantly spherical vesicles about 50 nm in diameter and a few often swollen mitochondria. The terminals synapsed on dendrites of various calibres, spindle- or pear-shaped somal profiles with short axes lesser than 8 μm, and axon terminals. In axo-axonal synapses, most labelled terminals appeared to be presynaptic. Frequently, profiles of labelled terminals were in direct apposition with one another. The latter may represent the morphological substrate of the interaction between baro- and chemoreceptor inputs in the nucleus of the tractus solitarius and warrants further study. The present results indicate that in addition to direct inputs, the carotid sinus afferents are able to influence second-order neurons in the nucleus of the tractus solitarius indirectly through presynaptic modulation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01189012
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