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  • 11
    Electronic Resource
    Electronic Resource
    Some physical properties of amorphous SiO2 synthesized by shock compression of α quartz (1980)
    Springer
    Physics and chemistry of minerals 5 (1980), S. 367-377 
    Details
    ISSN: 1432-2021
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Abstract The amorphous phase of SiO2 produced upon recovery of shock-compressed quartz demonstrates a wide range of refractive indices which can be correlated to the shock state. Both infra-red absorption spectra and X-ray diffraction patterns indicate that the shock-produced amorphous SiO2 has a statistically more-random atomic distribution and longer Si-O and shorter Si-Si separation than does fused silica. By accounting for phase transformation, the calculated values of the shock and residual temperature are much higher than those obtained by Wackerle (1962) to a pressure of 700 kbar. Our results are consistent with experimental ones.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00307545
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  • 12
    Electronic Resource
    Electronic Resource
    Carcinogenesis in accessory sex organs of rats induced by 3,2′-dimethyl-4-aminobiphenyl: response to androgen deprivation (1997)
    Springer
    Histochemistry and cell biology 108 (1997), S. 505-512 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract  It is generally accepted that early human prostate cancers reveal higher androgen dependency than do advanced ones. In the present study, we examined whether the animal model of prostate cancer has already lost androgen dependency at the early stages of carcinogenesis. At experimental week 46, androgen deprivation was induced in rats and the incidences of atypical hyperplasia and cancer were examined in the ventral, dorsolateral prostate, coagulating glands, and seminal vesicles. Androgen deprivation significantly lowered the incidence of atypical hyperplasia in all four organs. As for the incidence of cancer, no significant differences were observed in the coagulating glands and seminal vesicles. Regarding atypical hyperplasia, androgen deprivation significantly decreased the proliferative cell nuclear antigen labeling index in the coagulating gland and seminal vesicles. The presence of cancer was also decreased in the coagulating gland but not in the seminal vesicles. With control group specimens, more intense staining of androgen receptor was observed in atypical hyperplasias than in cancers. Compared with the atypical hyperplasias, the cancers revealed low androgen dependency at the early stages of carcinogenesis. The cancers in the seminal vesicles also revealed higher androgen independency than did those in the coagulating gland.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004180050191
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  • 13
    Electronic Resource
    Electronic Resource
    Measurements of energy correlations ine + e −→hadrons (1984)
    Springer
    The European physical journal 25 (1984), S. 231-239 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Energy-energy-correlations (EEC) have been measured with the JADE detector at c.m. energies of 14 GeV, 22 GeV and in the region 29 GeV〈E cm〈36 GeV. Corrected results are presented of EEC and their asymmetry, which can be directly compared to theoretical predictions. At 〈E cm〉=34 GeV a comparison with second order QCD predictions yields good agreement for the string model fragmentation resulting in a value of the strong coupling constant α s =0.165±0.01 (stat.). The independent fragmentation models, which yield values of α s between 0.10 and 0.15 depending on the treatment of energy and momentum conservation and of the gluon splitting, do not provide a satisfactory description of the data over the full angular range.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01547922
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  • 14
    Electronic Resource
    Electronic Resource
    New results one + e −→μ + μ − from the JADE detector at PETRA (1985)
    Springer
    The European physical journal 26 (1985), S. 507-513 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The production of collinear muon pairs has been studied using the JADE detector at thee + e − storage ring at PETRA. Results for the total cross section and the angular distribution were obtained at centre of mass (cm) energies ranging from 12 to 46 GeV. The data correspond to an integrated luminosity offLdt〉90 pb−1, of which 71.2 pb−1 were taken at $$\left\langle {\sqrt s } \right\rangle $$ =34.4 GeV and 17 pb−1 at $$\left\langle {\sqrt s } \right\rangle $$ =42.4 GeV. The results are compared to electroweak theories, in particular the “Standard Model”.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01551792
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  • 15
    Electronic Resource
    Electronic Resource
    A new biodegradable polydepsipeptide microsphere for application in drug delivery systems (1990)
    Springer
    Colloid & polymer science 268 (1990), S. 726-730 
    Details
    ISSN: 1435-1536
    Keywords: Sequentialpolydepsipeptide ; polymericmicrosphere ; poly(L-alanyl-L-alanyl-γ-ethyl L-glutamyl-L-lactyl) ; solventevaporationprocess ; drugdeliverysystem ; malerat ; ratprostate ; 17Β estradiol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A sequential polydepsipeptide containing a tripeptide sequence L-alanyl-Lalanylγ-ethyl L-glutamyl and anα-hydroxy acid L-lactic acid, poly(Ala-Ala-Glu(OEt)-Lac), was synthesized to prepare the microspherical particles by the solvent evaporation process. In this case, the solvents play the most important role for the preparation of polydepsipeptide microspheres and, as an example, when 200 mg of the polydepsipeptide dissolved in 10 ml of 98/2% chloroform/dichloroacetic acid mixture was stirred at 400 rpm and 30
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01411103
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  • 16
    Electronic Resource
    Electronic Resource
    Electroretinogram as a possible monitor of anesthetic depth (1986)
    Springer
    Graefe's archive for clinical and experimental ophthalmology 224 (1986), S. 473-476 
    Details
    ISSN: 1435-702X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The effects of volatile anesthetics, i.e., methoxyflurane, halothane and enflurane, on the electroretinogram (ERG) were studied in 15 albino rabbits. The ERG was analyzed in terms of the a-wave, and the first oscillatory component (01) in the b-wave. The 01 peak latency showed a significant dose-related prolongation when anesthetic end-tidal concentrations were in excess of 0.8 minimum alveolar concentration (MAC). One MAC, a measure of anesthetic potency, is the end-tidal concentration of an anesthetic at 1 atmosphere that induces immobility in 50% of animals against a noxious stimulus. The amplitudes of the a-wave and the 01 decreased in dose-dependent manners, but their changes were less striking than those of the 01 latency. The peak latency of the a-wave remained unchanged. We conclude that the 01 peak latency is a useful monitor of the depth of inhalational anesthesia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02173367
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  • 17
    Electronic Resource
    Electronic Resource
    Synthesis of the B1-type tantalum nitride by shock compression (1993)
    Springer
    Journal of materials science 28 (1993), S. 3439-3443 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract B1-type tantalum nitride (polycrystalline bulk state) was synthesized by shock compression. Shock-compression recovery experiments of the porous sample of tantalum nitride with a hexagonal structure (CoSn-type) were performed in the impact-velocity range up to 1.5kms−1. The instrumental chemical analysis, X-ray and electron diffraction experiments were carried out on the recovered tantalum nitride sample and the combustion-synthesized B1-type sample for comparison. The recovery rate of the B1 -type phase increased with increasing porosity, impact velocity and impactor thickness; among these above all the effect of porosity was most remarkable. Almost 100% recovery rate was achieved for the powder of 70% porosity impacted by a 2 mm thick tungsten plate with velocities above 1.4 kms−1. It was confirmed by chemical analysis that the nitrogen content did not change by shock compression. The chemical formulae of the shock-synthesized and combustioned-synthesized B1-type phases were estimated to be TaN0.96–0.99 and TaN1.13–1.16, 1.27–1.30, respectively. The lattice parameter of the shock-synthesized B1 -type (Fm3m) phase was ao=0.43363- + (1) nm. The results of X-ray and electron diffraction experiments also supported that the shock-synthesized B1-type tantalum nitride has a good stoichiometry compared with the combustion-synthesized ones.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01159819
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  • 18
    Electronic Resource
    Electronic Resource
    Synthesis of the WC-type tantalum nitride by mechanical alloying (1994)
    Springer
    Journal of materials science 13 (1994), S. 174-176 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00278152
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  • 19
    Electronic Resource
    Electronic Resource
    Elektronenmikroskopische Untersuchungen an der Epiphysis cerebri beim Hund (1966)
    Springer
    Cell & tissue research 69 (1966), S. 129-139 
    Details
    ISSN: 1432-0878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung 1. Die Epiphysis cerebri von 30 Hunden wurde elektronenmikroskopisch im Hinblick auf ihre sekretorische Funktion untersucht. 2. Die Pinealzellen sind sekretorisch tätige Zellen. Das Sekret wird in Form von „synaptischen“ Bläschen im Bereich des Golgi-Apparates produziert. Außer den Bläschen wurden osmiophile Granula (Pigmentgranula und Fetttröpfchen) verschiedener Menge beobachtet. 3. Die Pinealzellen sind multipolare Zellen mit Fortsätzen von verschiedener Länge und Dicke. Sie enden mit keulenförmigen Anschwellungen in den perivaskulären Spalten. 4. Die im Fortsatz enthaltenen Bläschen (Durchmesser 350–1400 Å) besitzen in der Regel ein elektronendichtes Granulum. Sie werden wahrscheinlich durch die Basalmembran in das Kapillarlumen abgegeben. Damit stellt sich der Sekretionsmodus der Zirbeldrüse als ähnlich heraus mit dem bei der Neurosekretion oder bei Abgabe von neurohumoralen Transmitters in der Nervenendigung.
    Notes: Summary The epiphysis of 30 dogs was studied electronmicroscopically. The pineal cells are secretory elements; their product arises from small vesicles in the Golgi apparatus. In addition to such vesicles, osmiophilic granules (pigments and lipids) were observed in varying amounts. The pineal cells are multipolar with processes of diverse length and thickness. These end with bulbous swellings in perivascular clefts. The vesicles found in the processes (diameters 350–1,400 Å) as a rule contain an electron dense granule. They are probably released into the capillary lumen via the basement membrane. Thus the secretory process in the pineal seems to resemble that in neurosecretory centers or that of the site of production of neurohumoral transmitters at nerve endings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00406271
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