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  • 1
    Electronic Resource
    Electronic Resource
    Two sulfur-containing ansamycin antibiotics fromStreptomyces albolongus (1986)
    Springer
    Cellular and molecular life sciences 42 (1986), S. 1167-1170 
    Details
    ISSN: 1420-9071
    Keywords: Ansamycin ; ansathiazin ; awamycin ; Streptomyces albolongus C-46366 ; gram-positive bacteria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Two sulfur-containing ansamycin antibiotics were isolated from the culture broth ofStreptomyces albolongus C-46366; the major one was identical with awamycin and the minor one was a new ansamycin antibiotic, ansathiazin. Their structures were elucidated from their reactions and spectroscopic analyses. These antibiotics were active against gram-positive bacteria, acid-fast bacteria and a protozoan.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01941296
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  • 2
    Electronic Resource
    Electronic Resource
    Fine structure of neurons synthesizing vasoactive intestinal peptide in the human colon from patients with Hirschsprung's disease (1989)
    Springer
    Histochemistry and cell biology 93 (1989), S. 1-8 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The fine structure of neuronal perikarya and processes containing VIP-like immunoreactive material in the colon of patients with Hirschsprung's disease was investigated by immunoelectron microscopy. No VIP-like immunoreactive terminals were found in Auerbach's plexus of the ganglionic segment. However, VIP-like immunoreactive preterminal axons were frequently found to make synaptic contact with both immunoreactive and non-immunoreactive elements within Meissner's plexus. Therefore, the function of the VIP neurons in Auerbach's plexus seems to differ from that in Meissner's plexus. In the oligoganglionic segment, there were a few VIP-like immunoreactive processes, but no VIP-like immunoreactive synaptic formations. VIP-like immunoreactive processes were rarely encountered in the aganglionic segment. In both the oligo-and aganglionic segments, bowel relaxation is considered to be disturbed due to the lack of synaptic contacts of VIP-like immunoreactive neurons with other neuronal components.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00266839
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  • 3
    Electronic Resource
    Electronic Resource
    Measurement of flame temperature by optical fiber thermometer (1988)
    Springer
    Experiments in fluids 6 (1988), S. 514-520 
    Details
    ISSN: 1432-1114
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The characteristics of an optical fiber thermometer (OFT) having a black body cavity sensor, constructed with a thin platinum film sputtered on a sapphire rod tip, were examined and compared with those of bare or sheathed thermocouples. For time averaged temperature measurements by the OFT, the radiative heat loss is significant in the temperature range of flames. For fluctuating temperatures the OFT output has a slow response, due to its thermal inertia, which depends on the diameter of the sensor and flow conditions; in spite this the rapid response of the OFT is emphasized in the literature with the assumption of the ideal thermal behavior of the thin sputtered film ( ⩰ 4 μm) on a sapphire rod of 0.25 mm diameter. The fluctuation waveform predicted by the present numerical simulation agrees satisfactorily with the measured one, which proves that the major factor affecting the thermal inertia of an OFT sensor is the heat capacity of sapphire. A special compensation technique is needed to improve the response of the OFT.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00196597
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  • 4
    Electronic Resource
    Electronic Resource
    Survival of cultured cells and somatic embryos of Asparagus officinalis cryopreserved by vitrification (1989)
    Springer
    Plant cell reports 8 (1989), S. 418-421 
    Details
    ISSN: 1432-203X
    Keywords: Cryopreservation ; Vitrification ; Plant germplasm ; Asparagus ; Asparagus officinalis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Cultured cells and somatic embryos derived from the mesophyll tissue of asparagus (Asparagus officinalis L.) were cryopreserved by vitrification. The vitrification solution (PVS) contains (w/v) 22% glycerol, 15% ethylene glycol, 15% propylene glycol and 7% DMSO in Murashige-Skoog medium enriched with 0.5M sorbitol. After initial cryoprotection with sorbitol supplemented MS medium containing 12% ethylene glycol, cells or embryos were exposed stepwise to 85% PVS at 0°C. They were loaded into 0.5 ml transparent straws, and were then plunged directly into liquid nitrogen. After rapid warming, PVS was removed and diluted stepwise. The highest survivals of vitrified cells and embryos were about 65 and 50%, respectively. Surviving embryos developed into plantlets.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00270083
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  • 5
    Electronic Resource
    Electronic Resource
    Angle-resolved ultraviolet photoemission study of first stage alkali-metal graphite intercalation compounds (1988)
    Springer
    The European physical journal 70 (1988), S. 349-355 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The electronic band structure of the first stage alkali-metal graphite intercalation compounds (C8K, C8Rb and C8Cs) was determined by angle-resolved ultraviolet photoelectron spectroscopy. The dispersive feature of the π* bands at $$\tilde K$$ point in the Brillouin zone was clearly observed in all the compounds. The electron occupancies in the π* band of C8K, C8Rb and C8Cs were estimated to be 0.5±0.05 e (e; unit electronic charge), 0.45±0.05 e and 0.4±0.05 e, respectively. This strongly suggests that another half of the unit electronic charge is accommodated in the three-dimensional band at Γ point, which forms a spherical Fermi surface at the center of the Brillouin zone. The character of the three-dimensional band at Γ point was also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01317241
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  • 6
    Electronic Resource
    Electronic Resource
    An anomalous phenomenon occurring in the flow of viscoelastic fluids out of ducts (1988)
    Springer
    Rheologica acta 27 (1988), S. 523-530 
    Details
    ISSN: 1435-1528
    Keywords: Viscoelasticfluid ; ductflow ; surface pattern ; ridge ; recoil effect
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract When viscoelastic fluids flow out from horizontal ducts many cracks and protruding ridges are formed on the jet surface. As far as the authors know, this phenomenon has not yet been reported. The occurrence of the anomalous phenomenon is not affected by inlet flow condition or duct shape. The phenomenon may be divided into three regimes, namely, a stable state, a breakage state, and a multiplication state. In the breakage state one ridge divides into two parts after its growth, and in the multiplication state a new ridge is suddenly formed at a crack point. With increasing shear rate, the flow pattern of the jet changes from the stable state to the breakage state, and then to the multiplication state. Furthermore, a recoil effect is observed. In this effect many air bubbles rush into the duct from the exit when the flow is quickly stopped.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01329352
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  • 7
    Electronic Resource
    Electronic Resource
    Thermal decomposition of the solvent-extracted chloro complexes of trivalent gallium, indium and thallium with trioctylamine and trioctylmethylammonium chloride (1986)
    Springer
    Journal of thermal analysis and calorimetry 31 (1986), S. 653-666 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Komplexe von dreiwertigem Gallium, Indium und Thallium mit Trioctylamin (TOA, R3N) und Trioctylmcthylarnmonium-Hydrochlorid (TOMAC, R3R'NCl) wurden durch Trocknung der benzolischen Extrakte der die Metallchloride mit TOA bzw. TOMAC enthaltenden wässrigen Lösungen im Vakuum dargestellt: R3NHGaCl4, (R3NH)2InCl5, R3NHTlCl4, R3R'NGaCl4, R3R'NInCl4 und R3R'TlCl4. Die dargestellten Komplexe wurden durch TG und DTA in Stickstoffatmosphäre untersucht. Die Produkte der thermischen Zersetzung, flüchtige Substanzen und Rückstände, wurden gas-chromatographisch, röntgendiffraktometrisch und 1R-spektrophotometrisch untersucht. Es wurde festgestellt, daß die Komplexe dieser dreiwertigen Metalle sich thermisch durch Krackung der Alkylgruppen zu den Chloriden (GaCl3, InCl3 und TlCl3) zersetzen.
    Abstract: Резюме Комплексы хлоридов т рехвалентных галлия, индия и таллия с триок тиламином (ТОА, R3N) и триоктилметил аммоний хлоридом (ТОМ АС, R3R′NCl) состава R3NHGaCl4, (R3NH)2InCl5, R3NHTlCl4, R3R′NGaCl4, R3R′NInCl4 и R3R′NTlCl4 бы ли получены высушиванием в вакуу ме органических экст рактов, полученных при совме стном экстрагировании хло ридов металлов с ТОА и ТОМАС в бензоле. Полученные к омплексы были изучены методами ТГ и ДТА в атмосфере азота, а продукты термического разлож ения анализировались газ овой хроматографией, рентгено-фазовым ана лизом и ИК спектромет рией. Установлено, что эти к омплексы разлагаютс я до хлоридов металлов (GaCl3, InCl3 и TlCl) c расщеплением алкиль ных групп.
    Notes: Abstract The complexes of trivalent gallium, indium and thallium with trioctylamine (TOA, R3N) and trioctylmethylammonium chloride (TOMAC, R3R′NCl) were prepared by drying in vacuo the organic extracts from aqueous solutions containing the chlorides of their metals with TOA and TOMAC in benzene: R3NHGaCl4, (R3NH)2InCl5, R3NHTlCl4, R3R'NGaCl4, R3R'NInCl4 and R3RTlCl4. The prepared complexes were examined by TG and DTA under an atmosphere of nitrogen, and the products of their thermal decompositions, such as volatile matter and residues, were examined by gas chromatography, X-ay diffraction study and infrared spectrophotometry. It was found that the complexes of these trivalent metals with TOA and TOMAC decompose thermally to the chlorides (GaCl3, InCl3 and TlCl) through the cracking of alkyl groups.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01914243
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  • 8
    Electronic Resource
    Electronic Resource
    Interdiffusion in the aluminium-rich solid solution of Al-Cu alloys (1985)
    Springer
    Journal of materials science 4 (1985), S. 797-798 
    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/BF00726994
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  • 9
    Electronic Resource
    Electronic Resource
    Selective preparation of copper, copper(I) oxide, or copper(II) oxide fine particles from organocopper compounds (1988)
    Springer
    Journal of materials science 7 (1988), S. 1251-1252 
    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/BF00722355
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  • 10
    Electronic Resource
    Electronic Resource
    Interdiffusion in the copper-rich solid solution of Cu-Si alloys (1988)
    Springer
    Journal of materials science 7 (1988), S. 365-367 
    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/BF01730745
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