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  • 1
    Electronic Resource
    Electronic Resource
    Interfacial reaction and defect microstructure of epitaxial MnSb/Si(111) grown by hot-wall epitaxy (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 83 (1998), S. 5504-5508 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The microstructure of epitaxial MnSb grown on (111) oriented Si substrates by hot-wall epitaxy has been assessed using the combined techniques of x-ray diffraction, and conventional and high resolution transmission electron microscopy (HRTEM). The growth temperature and layer thickness dependence of epitaxial MnSb/Si has been investigated. Optimum MnSb(0001) layers were grown under conditions of low substrate temperature of 300 °C with a Sb/Mn flux ratio of 10. HRTEM imaging revealed the existence of a thin interfacial layer of MnSi rotated 30° with respect to the Si substrate to reduce the lattice mismatch. The predominant epitaxial relationship is given by (0001),[1¯21¯0]MnSb(parallel)(111),[12¯1]MnSi(parallel)(111),[01¯1]Si. Only evidence for the presence of MnSi was found with no evidence for any other Mn–Si phases. The formation of MnSi is enhanced at an elevated substrate temperature of 350 °C, while the quality of the MnSb overlayer is correspondingly degraded leading to polycrystalline growth. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.367410
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  • 2
    Electronic Resource
    Electronic Resource
    Bis(2-methyl-8-quinolinolato-N,O)tin(II) (1999)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 55 (1999), S. 876-878 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270199002887
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  • 3
    Electronic Resource
    Electronic Resource
    The synthesis and chromatography of peptide nitriles (1977)
    Springer
    Origins of life and evolution of the biospheres 8 (1977), S. 347-353 
    Details
    ISSN: 1573-0875
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract Di- and tripeptide nitriles, glycylaminoacetonitrile (Gly-AAN), diglycylaminoacetonitrile (Gly-Gly-AAN), alanyl-α-aminopropionitrile (Ala-APN), and dialanyl-α-aminopropionitrile (Ala-Ala-APN) were synthesized first. These peptide nitriles and related peptides and peptide amides were analyzed by means of ion-exchange chromatography. The every two diastereomers of dialanine, dialanine amide, and Ala-APN were separated into two peaks by using a pH 3.25 buffer as an eluent. The four isomers of trialanine, trialanine amide, and Ala-Ala-APN gave four, two, and one peak, respectively under the same conditions. The trimethylsilyl derivatives of alanyl peptides and related compounds were analyzed by means of gas chromatography combined with mass-spectrometry. The parent (M+ and/or M+-15) and other mass numbers observed in their mass-spectra supported the introduction of various numbers of trimethylsilyl groups.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00927905
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  • 4
    Electronic Resource
    Electronic Resource
    Herbicide-resistant transgenic creeping bentgrass plants obtained by electroporation using an altered buffer (1998)
    Springer
    Plant cell reports 17 (1998), S. 963-967 
    Details
    ISSN: 1432-203X
    Keywords: Key wordsAgrostis palustris Huds. ; Protoplast ; Transformation ; Turfgrass
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Modification of an electroporation buffer using Ca(NO3)2 and elevated pH (9–10) appeared to have a favorable effect on gene transfer to creeping bentgrass (Agrostis palustris Huds.) Penncross protoplasts, resulting in an increase in the transformation frequency of about twofold. Following electroporation with the plasmid pARK22 containing the bar gene, a total of 278 bialaphos-resistant cell colonies were obtained from four experiments. The bialaphos-resistant regenerants proved to be transgenic by Southern hybridization of the amplified DNA. All the tested transgenic plants showed herbicide (HERBIE) resistance at the field rate of 0.5–1% (vol/vol). Ammonia contents in leaves after spraying with the herbicide increased less in transgenic plants than in untransformed control plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002990050518
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  • 5
    Electronic Resource
    Electronic Resource
    Transgenic Japanese lawngrass (Zoysia japonica Steud.) plants regenerated from protoplasts (1998)
    Springer
    Plant cell reports 17 (1998), S. 334-338 
    Details
    ISSN: 1432-203X
    Keywords: Key words Japanese lawngrass ; Zoysia japonica ; Polyethylene glycol ; Genetic transformation ; Hygromycin phosphotransferase ; β-Glucuronidase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Transgenic Japanese lawngrass (Zoysia japonica Steud.) plants were generated by means of polyethylene glycol (PEG)-mediated direct gene transfer into protoplasts. The plasmid pBC1 was used to deliver the hygromycin phosphotransferase (hph) and β-glucuronidase (gus) genes into protoplasts. Selection with a high concentration (400 mg/l) of hygromycin yielded a number of resistant calli and about 400 plants were generated. Polymerase chain reaction (PCR) and Southern hybridization analyses revealed that all of then plants tested contained introduced genes. The gus gene regulated by the maize alcohol dehydrogenase-1 (Adh 1) promoter was expressed in the leaves and roots of transgenic Japanese lawngrass plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002990050403
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  • 6
    Electronic Resource
    Electronic Resource
    An animal model of copulatory disorder induced by social stress in male mice: effects of apomorphine and l-dopa (1997)
    Springer
    Psychopharmacology 133 (1997), S. 249-255 
    Details
    ISSN: 1432-2072
    Keywords: Key words Copulatory disorder ; Social stress ; Apomorphine ; l-Dopa ; Defeat ; Male mice
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  We investigated the possible role of dopamine receptors in the mediation of copulatory disorder induced by defeat experience in male mice, using l-dopa and apomorphine. To generate the copulatory disorder, male mice were attacked 20 times daily for 5 consecutive days, as intruders in confrontation with an aggressive resident. Following the repeated exposure to defeat, virtually all intruder males failed to display copulatory behavior towards estrous females. Acute injection of apomorphine (25, 50, 75 μg/kg, SC) significantly increased both the incidence and the frequency of copulatory elements (mounting and intromission) in a dose-dependent manner. The combination of l-dopa with carbidopa, a dopa decarboxylase inhibitor, also increased significantly copulatory behavior, revealing an inverted U-shaped dose-effect curve. In both cases, locomotion and digging frequencies were significantly decreased. This evidence suggests that dopaminergic mechanisms are involved in the mediation of social stress-induced copulatory disorder.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002130050398
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  • 7
    Electronic Resource
    Electronic Resource
    A study on tension signs in lumbar disc hernia (1979)
    Springer
    International orthopaedics 3 (1979), S. 225-228 
    Details
    ISSN: 1432-5195
    Keywords: Spine ; Lumbar spine ; Disc hernia ; Tension signs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Les lames des dernières vertèbres lombaires ont été réséquées sur cinq cadavres dans les quatre heures suivant la mort. Un court tube de caoutchouc a été inséré entre les racines nerveuses et le disque lombaire; la tension a été ensuite enregistrée grâce à des capteurs de pression transistorisés. Les stress angulaires exercés sur les racines lombaires lors de la recherche des signes de tension correspondent aux résultats fournis par l'expérience clinique.
    Notes: Summary The laminae were removed from the lower lumbar spines of five cadavers within four hours of death. A short length of rubber tube was inserted between the nerve roots and the lumbar disc and the tension monitored using semiconductor pressure transducers. The angulatory stresses exerted on the lumbar nerve roots during tension sign tests were found to correspond to clinical experience.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00265716
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