Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    ISSN: 1520-6041
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Annales geophysicae 17 (1999), S. 1457-1462 
    ISSN: 0992-7689
    Keywords: Atmospheric composition and structure (aerosols and particles, cloud physics and chemistry) ; Meteorology and atmospheric dynamics (mesoscale meteorology)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Polar stratospheric clouds (PSCs) are often observed in the Kiruna region in northern Sweden, east of the Scandinavian mountain range, during wintertime. PSC occurrence can be detected by ground-based optical instruments. Most of these require clear tropospheric weather. By applying the zenith-sky colour index technique, which works under most weather conditions, the data availability can be extended. The observations suggest that PSC events, especially of type II (water PSCs) may indeed more common than predicted by synoptic models, which is expected because of the frequent presence of mountain-induced leewaves. However, it will be of importance to increase the density of independent observations.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1432-0568
    Keywords: Brainstem ; Mechanosensory system ; Otavolateral efferents ; Teleost ; Tract-tracing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The efferent neurons of the lateral line system of the euteleost Aplocheilus lineatus and the osteoglossomorph Pantodon buchholzi, both surface feeding fish, were examined by neuronal tract tracing. Besides horseradish peroxidase, fluorescent dextrans were used as tracers to allow simultaneus visualization of projections from different lateral line branches. Labeled efferent neurons were found in nuclei situated in the medulla ventral of ventricle IV. This position resembles the octavolateralis efferent nucleus of previous studies. The number of labeled cells in the efferent nucleus is low in both species. Most neurons were found ipsilaterally to the application site, some along the midline and only very few contralaterally. The size of efferent cells differs distinctly between Aplocheilus, possessing small cellbodies (length 16.5 μm), and Pantodon, which has very large efferent cells (length 47.0 μm). Efferent axon bundles course rostrally in both species, leaving the brain at the level of the anterior lateral line nerve. Only Aplocheilus has in addition lateral axon bundles leaving the brain at the level of the posterior lateral line nerve. After application of one fluorescent tracer to the lateral ramus and a different fluorescent tracer to the superficial ophtalmic ramus in a given animal, double-labeling of efferent cells hardly ever occurs. If the neuromasts I and IV of the dorsal skull of Pantodon are applied with one fluorescent tracer each, ∼10% of centrally labeled cells are double-labeled. Considering the results of double-labeling, the concept of a differential innervation of lateral line branches is supported and discussed.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1432-1440
    Keywords: Thrombotic thrombocytopenic purpura ; Plasma exchange ; Platelet factor 4
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We report two patients with thrombotic thrombocytopenic purpura who were subjected to plasma exchange. In one case, the plasma levels of platelet factor 4, measured shortly after plasma exchange, increased significantely during plasma exchange. This was followed, however, by a failure to respond to therapy. Repeated plasmapheresis over 3 weeks gave no therapeutic benefit and reversible deep coma occurred. This patient recovered completely after treatment with vincristine. In the second patient, a decline in platelet factor 4 was observed after plasma exchange. This was accompanied by improvement of the patient's condition and a slow rise in platelet count. Plasma exchange was again carried out in this patient because of a recurrence of thrombotic thrombocytopenic purpura 3 years later; again decreased platelet factor 4 plasma levels were observed after plasma exchange and again a therapeutic response followed. Platelet factor 4, therefore, seems to be an effective and early index for the therapeutic benefit of plasma exchange in thrombotic thrombocytopenic purpura.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Marine biology 115 (1993), S. 173-178 
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The marine hydroid Hydractinia echinata develops into a primary polyp from a planula larva stage. The planula does not undergo metamorphosis in sterile filtered seawater. Metamorphosis is induced by certain bacteria occurring, as a rule, on the shells of molluscs inhabited by hermit crabs of the genus Eupagurus. Bacteria were isolated from shells occupied by H. echinata, and bacterial clones were selected which had a strong potency for inducing metamorphosis in planula larvae. One such clone was further subcloned for strong metamorphosis-inducing potency and finally investigated for inductive characteristics and for identification purposes. The bacterium is a motile, aerogen, gram-negative rod with a polar flagellum. It was identified on the basis of several physiological characteristics as a strain of the genus Alteromonas espejiana. The ability to induce metamorphosis might not be restricted to A. espejiana. The inhibitor of protein kinase C, sphingosine, inhibited metamorphosis induced by A. espejiana. The metamorphosis-inducing principle is likely to be a lipid, since upon lipid extraction and separation of different lipid classes by solid phase extraction on silica-aminopropyl columns a metamorphosis-inducing fraction was obtained.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 72 (1994), S. 772-774 
    ISSN: 1432-1440
    Keywords: Type A natriuretic peptide (CDD/ ANP-99-126) ; Bronchodilation ; Asthma therapy ; Lung function
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Type A natriuretic peptide (CDD/ANP99-126) in its circulating form was analyzed with respect to the localization of its bronchodilating effects in asthmatic subjects in vivo. The intravenous infusion of 5.7, 11.4, and 17.1 pmol kg−1 min− CDD/ANP-99-126 caused a significant bronchodilation of both central and peripheral airways. While the localization of the bronchodilating effects was similar to β2-agonists, an improvement in lung function parameters comparable to these substances was not observed. But other members of the natriuretic peptide family may reveal a stronger bronchodilating potency.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Antimony-rich vein mineralisation is widespread in the German part of the Variscan orogenic belt. Mineralogical investigation of a representative suite of these deposits, coupled with fluid inclusion characterisation and microthermometry, permits a reconstruction of their genetic evolution. Two structural settings host antimony mineralisation: the cores or flanks of anticlinal zones and major lithological contrasts. Channelled migration of geothermal fluids through permeable rock sequences and later stagnation of fluids in cap-rock situations inside the anticlinal zones led to mineral deposition. The mineralising event is interpreted as relating to input of deep-sourced fluids during late-orogenic exhumation at the transitional stage between collision tectonics and the late-Variscan extensional regime. Fluid inclusion data, chlorite geothermometry and the presence of meneghinite as a characteristic Pb-Sb-sulfosalt mineral in a number of vein systems allows constraints on model P-T conditions at the onset of mineralisation to be made. These are as high as 390 to 440 °C at 0.6–1.0 kbar for the Saarsegen, Apollo and Schöne Freundschaft deposits, with lower temperatures of 320–340 °C being obtained for the Spes deposit. The fluid inclusion data indicate drastic fluid cooling during the mineralising event; minimum temperatures of approximately 150–220 °C are obtained for all deposits at the end of vein quartz formation, which coincided with deposition of stibnite and most of the Pb-Sb sulfosalts. Besides the formation of extensional quartz-stibnite-Pb-sulfosalt veins, the mineralising, low-salinity NaCl-KCl-rich high-temperature tectonic brines have overprinted sulfide assemblages within earlier siderite-(Cu)-Pb-Zn veins. This has led to replacement reaction textures and remobilisation of sulfide components within the vein systems. In contrast with the earlier siderite-(Cu)-Pb-Zn veins, neither the quartz-stibnite-sulfosalt nor the (Cu)-Pb-Sb sulfosalt assemblages were affected by Variscan deformation. Rather, they display characteristic extensional features crosscutting all earlier structures and can thus be assigned to a later phase of mineralisation. Fluid composition characteristics and structural criteria indicate formation in the latest part of the Variscan mineralisation cycle; a post-Variscan genesis being rejected on grounds of conspicuously diverging fluid characteristics. A comparison of antimony deposits in the Rheinisches Schiefergebirge with other late-orogenic deposits elsewhere in the European Variscan belt indicates a significant number of shared features, enabling them to be placed into a common model related to the onset of late-Variscan brittle extensional tectonics.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    ISSN: 1432-0630
    Keywords: PACS: 42.62.-b; 42.65.Re; 81.65.Cf
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract. Recently, it has been proven that femtosecond lasers are ideal tools for the microstructuring of solid targets. Since thermal and mechanical influences are minimized, diffraction-limited structures can be generated in the far field. The diffraction limit can be overcome when one works in the near field. In this paper, concrete applications and new developments in both regimes are highlighted.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    ISSN: 1432-1041
    Keywords: Cyclophosphamide ; Pharmacokinetics ; 4-Hydroxycyclophosphamide ; Bone marrow Transplantation ; Total body irradiation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary High-dose cyclophosphamide is used immediately after total body irradiation (TBI) in conditioning for bone marrow transplantation (BMT). Possible interactions of the two treatment modalities were sought by measuring the blood pharmacokinetics of CP and 4-hydroxy-cyclophosphamide (4-HOCP) in patients undergoing BMT. There was a non-significant trend to a shorter half-life of CP compared to reported values. Exposure to 4-HOCP, the major metabolite of CP, did not appear to be altered by prior TBI of the patient.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 10
    ISSN: 1399-0047
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Porphobilinogen synthase (PBGS) catalyzes the condensation of two identical substrate molecules, 5-aminolevulinic acid (ALA), in an asymmetric manner to form porphobilinogen. E. coli PBGS is an homooctameric enzyme. The number of active sites is not clear, but each subunit binds one ZnII ion and one MgII ion. Diffraction-quality crystals of native E. coli PBGS have been obtained, and unit-cell dimensions (a = 130.8, c = 144.0 Å) are reported. These crystals diffract to about 3.0 Å resolution.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...