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  • 11
    Electronic Resource
    Electronic Resource
    Gel-electrophoretic description of European populations ofTerellia virens (Loew) (Diptera, Tephritidae); implications for its use as an agent for the biological control ofCentaurea spp. (Asteraceae) in North America (1991)
    Springer
    Cellular and molecular life sciences 47 (1991), S. 859-864 
    Details
    ISSN: 1420-9071
    Keywords: Terellia ; Centaurea ; allozymes ; host races ; biological control
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Allozyme frequencies of 15 enzyme loci, 14 of which were polymorphic, were used to characterize sevenTerellia virens populations originating from three allopatrically distributedCentaurea species. The two populations whose origins were geographically furthest apart, from Israel (onC. iberica) and from Switzerland (onC. vallesiaca), showed relatively high values of genetic distance from the 5 populations sampled in Austria and Hungary (onC. maculosa) (Nei's D〉0.07). The latter five displayed a high degree of genetic similarity. No diagnostic (fixed) allelic differences were observed between these three groups ofT. virens populations, but they could be well characterized by significant differences in allelic frequencies at 9 enzyme loci. Independently of this study, the populations from Switzerland (C. vallesiaca) and eastern Austria (C. maculosa) were selected as potential source populations for future introductions into North America for the biological control of introducedC. maculosa andC. diffusa. Based on the observed genetic differences and results from field experiments on the host specificity of these two potential source populations, it is argued that host specificity screening tests should be conducted separately for local (host plant) populations, as such populations might accept a different set of hosts. Biotype mismatch and the risk of spill-overs to native species could thus possibly be reduced.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01922473
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  • 12
    Electronic Resource
    Electronic Resource
    Ontogenesis of the rabbit pituitary intermediate lobe (1993)
    Springer
    Anatomy and embryology 187 (1993), S. 87-97 
    Details
    ISSN: 1432-0568
    Keywords: Pituitary intermediate lobe ; Rabbit ; Ontogenesis ; Immunocytochemistry ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The development of the intermediate lobe of the rabbit pituitary was investigated by light and electron microscopy and by using immunocytological techniques. The first immunoreactive melanotrophic cells were detected at the fetal day 17 in the dorsal zone of Rathke's pouch epithelium facing the neural lobe; this coincided ultrastructurally with the appearance in this area of a few cells exhibiting secretory vesicles and granular condensations in the Golgi saccules. The differentiation of the gland probably required an infundibular inductive effect. Secretory cells increased in number following a dorsoventral gradient during the next fetal and neonatal stages until postnatal day 20, the stage at which the intermediate lobe exhibited its definitive organization. The gland innervation occurred during the first days after birth. The advent of these oxytocin- and neurophysin-immunoreactive fibres coincided with an obvious stimulation of the synthetic activity of the melanotrophic cells. The possible neurotrophic effect of these cells on their innervating system remains to be established.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00208199
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  • 13
    Electronic Resource
    Electronic Resource
    Assessment of the feasibility of utilizing Landsat for detection and monitoring of landfills in a statewide GIS (1993)
    Springer
    Environmental geology 22 (1993), S. 129-140 
    Details
    ISSN: 1432-0495
    Keywords: Landsat ; Landfill monitoring ; Remote sensing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Use of satellite data could be beneficial and cost effective in detecting and monitoring landfills in a state-wide geographic information system (GIS). To assure the feasibility of this approach, multitemporal Landsat data were used to detect several selected active and inactive landfills in central and southwest Missouri. The landfills were visually delineated from aerial photography of approximately the same two dates. A classification procedure based on homogeneity of the digital numbers was performed on each landfill scene for each time period using four spectral bands: two visible, one near-infrared, and one mid-infrared. The mid-infrared band proved more useful in delineating landfills, especially when spectral change was compared to the near-infrared band. The active landfills were spectrally different from surrounding land cover as were the two landfills which closed after the collection of the first Landsat scene. These landfills showed considerable areal change between the two selected time periods as verified by the aerial photographs. The inactive landfills were more difficult to discern from surrounding land cover types because they were grass covered and spectrally similar to pasture. Consequently, areal change could not be assigned to these older landfills because the reclamation process was practically complete.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00789325
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  • 14
    Electronic Resource
    Electronic Resource
    Transdermal oestrogene application a contraindication in therapy of endometriosis with Gonadotropin-Releasing Hormon analogues (1990)
    Springer
    Journal of molecular medicine 68 (1990), S. 537-537 
    Details
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01648254
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  • 15
    Electronic Resource
    Electronic Resource
    Course of coxsackie B antibodies during juvenile diabetes (1978)
    Springer
    Medical microbiology and immunology 164 (1978), S. 291-298 
    Details
    ISSN: 1432-1831
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Sera of 83 patients with insulin-dependent diabetes of early onset were tested for latexagglutination-inhibiting antibodies to coxsackie virus types B1–B5. We could not find any evidence of a causal association between Coxsackie B virus infection and diabetes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02125498
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  • 16
    Electronic Resource
    Electronic Resource
    Transmission via plants of an insect pathogenic bacterium that does not multiply or move in plants (1994)
    Springer
    Microbial ecology 27 (1994), S. 19-26 
    Details
    ISSN: 1432-184X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A bacterial parasite (designated as BEV) of the leafhopper Euscelidius variegatus, which is passed transovarially to offspring, was transmitted from insect to insect via feeding of the insects in plants. The rate of bacterial infection of leafhoppers fed upon plants that had previously been exposed to BEV-infected leafhoppers declined with an increase in the time that infected leafhoppers had been off rye grass. Transmission of BEV also occurred on sugar beet and barley but not celery. The bacterium was also transmitted to and acquired from membrane-encased artificial diets. There was no evidence that the bacterium was transmitted via plant surfaces, but transmission and direct culture assays from plants indicated that the bacterium did not multiply or move within plants. This parasite-host relationship may represent a primitive stage in either the evolution of intracellular symbiosis with its insect host or to alternative parasitization of plant and insect hosts via insect transmission, as is the case for insect-vectored plant pathogens.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00170111
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  • 17
    Electronic Resource
    Electronic Resource
    The effects of prostacyclin on gastric intramucosal pH in patients with septic shock (1995)
    Springer
    Intensive care medicine 21 (1995), S. 414-421 
    Details
    ISSN: 1432-1238
    Keywords: Prostacyclin ; Gastric intramucosal pH ; Splanchnic blood flow ; Splanchnic oxygenation ; Septic shock
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective To investigate whether infusing prostacyclin (PGI2) in patients with septic shock improves splanchnic oxygenation as assessed by gastric intramucosal pH (pHi). Design Interventional clinical study. Setting Surgical ICU in a university hospital. Patients 16 consecutive patients with septic shock according to the criteria of the ACCP/SCCM consensus conference all requiring norepinephrine to maintain arterial blood pressure. Interventions All patients received PGI2 (10 ng/kg·min) after no further increase in oxygen delivery could be obtained by volume expansion, red cell transfusion and dobutamine infusion. The results were compared with those before and after conventional resuscitation. The patients received continuous PGI2 infusion for 3–32 days. Measurements and results O2 uptake was measured directly in the respiratory gases, pHi was determined by tonometry. Baseline O2 delivery, O2 uptake and pHi were 466±122 ml/min·m2, 158±38 ml/min·m2, and 7.29±0.09, respectively. While O2 uptake remained unchanged, infusing PGI2 increased O2 delivery (from 610±140 to 682±155 ml/min·m2,p〈0.01) and pHi (from 7.32±0.09 to 7.38±0.08,p〈0.001) beyond the values obtained by conventional resuscitation. While 9 of 11 patients with final pHi〉7.35 survived, all patients with final pHi〈7.35 died (p〈0.01). Conclusions Infusing PGI2 in patients with septic shock increases pHi probably by enhancing blood flow to the splanchnic bed and thereby improves splanchnic oxygenation even when conventional resuscitation goals have been achieved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01707410
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  • 18
    Electronic Resource
    Electronic Resource
    Formation and role of glycine betaine in the moderate halophile Vibrio costicola (1991)
    Springer
    Archives of microbiology 155 (1991), S. 153-158 
    Details
    ISSN: 1432-072X
    Keywords: Halophilic ; Vibrio costicola ; Choline dehydrogenase ; Betaine aldehyde dehydrogenase ; Betainal dehydrogenase ; Glycine betaine ; Transport
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The moderate halophile Vibrio costicola, growing on a chemically-defined medium, transformed choline into glycine betaine (betaine) by the membrane-bound enzyme choline dehydrogenase and the cytoplasmic enzyme betainal (betaine aldehyde) dehydrogenase. Choline dehydrogenase was strongly induced and betainal dehydrogenase less strongly induced by choline. The formation of these enzymes was also regulated by the NaCl concentration of the growth medium, increasing with increasing NaCl concentrations. Intracellular betaine concentrations also increased with increasing choline and NaCl concentrations in the medium. This increase was almost completely blocked by chloramphenicol, which does not block the increase in salt-tolerant active transport on transfer from a low to a high salt concentration. Choline dehydrogenase was inhibited by chloride salts of Na+, K+, and NH inf4 su+ , the inhibition being due to the Cl- ions. Betainal dehydrogenase was stimulated by 0.5 M salts and could function in up to 2.0 M salts. Cells grew as well in the presence as in the absence of choline in 0.5 M and 1.0 M NaCl, but formed no intracellular betaine. Choline stimulated growth in 2.0 M NaCl and was essential for growth in 3.0 M NaCl. Thus, while betaine is important for some of the adaptations to high salt concentration by V. costicola, it by no means accounts for all of them.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00248610
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  • 19
    Electronic Resource
    Electronic Resource
    Temperature dependence of the InP(001) bulk and surface dielectric function (1997)
    Springer
    Applied physics 65 (1997), S. 333-339 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 81.15.Gh; 81.15.Ef; 78.20.Ci; 78.66.Fd; 61.14.Hg; 73.20.At
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003390050588
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  • 20
    Electronic Resource
    Electronic Resource
    Effects of single oral doses of clobazam, diazepam and lorazepam on performance tasks and memory (1987)
    Springer
    European journal of clinical pharmacology 32 (1987), S. 461-466 
    Details
    ISSN: 1432-1041
    Keywords: benzodiazepines ; lorazepam ; diazepam ; clobazam ; minor tranquilizers ; memory ; psychomotor performance ; clinical pharmacology ; healthy volunteers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The effects on memory and psychomotor performance and the subjective effects of three anxiolytic benzodiazepines (lorazepam 2 mg, diazepam 10 mg and clobazam 20 mg p.o.) have been evaluated in a double-blind, placebo-controlled, cross-over study in 10 healthy volunteers. At each session, measurements were made prior to and +3.5 h after drug administration, except in the case of REY's test, which was presented at H+1 h (learning) and was evaluated at H+8 h and at H+24 h (delayed recall). Single clinical doses of diazepam and lorazepam caused anterograde amnesia by disturbing acquisition, consolidation and retrieval. Clobazam did not impair memory. Lorazepam impaired performances in all the tests used to evaluate perception, immediate memory, reaction time, psychomotor skill and intellectual capacity. Diazepam caused a decrease in cortical arousal and the speed of perception of visual stimuli, whereas clobazam increased reaction time and reduced cortical arousal. Lorazepam caused a significant degradation of performance relative to the other two treatments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00637670
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