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  • Springer  (42)
  • Elsevier  (36)
  • Wiley  (9)
  • 2015-2019  (29)
  • 1990-1994  (37)
  • 1970-1974  (21)
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  • 1
    Electronic Resource
    Electronic Resource
    Der koordinaten-ähnliche Zustand von Molekülen. 3. Mitt (1974)
    Springer
    Colloid & polymer science 252 (1974), S. 348-348 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , 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/BF01551210
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  • 2
    Electronic Resource
    Electronic Resource
    The relationship of matrix norms to matrix singularities (1972)
    Springer
    Mathematische Zeitschrift 127 (1972), S. 365-369 
    Details
    ISSN: 1432-1823
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01111394
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  • 3
    Electronic Resource
    Electronic Resource
    Comparative studies on the metabolism of shallow-water and deep-sea marine fishes. II. Red-muscle metabolism in shallow-water fishes (1972)
    Springer
    Marine biology 15 (1972), S. 246-250 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Maximal rates of oxygen consumption in vitro have been measured under standardized conditions at three test temperatures (5°, 15°, 25°C) on minced preparations of red muscle from 10 species of shallow-water marine teleost fishes. These fishes came from three different geographic areas, two with cool average water temperatures (near 15°C: coastal southern California, Galápagos Islands) and one with warm average water temperatures (near 25°C: Hawaiian Islands). The group is made up of post-juvenile or adult epipelagic fishes, which are moderately or very active in terms of their locomotor activities. A large part of the range of phylogenetic diversity among the teleosts is represented, as is the body weight range from a few grams to several kilograms. The purpose of the work is to provide part of a set of tissue-metabolism data on shallow-water fishes for future comparison with similar results from deep-sea species. Of 8 complete curves for oxygen uptake rate versus temperature (R-T curves), 6 are normal in shape (Q10≧1.5), 1 is normal but with a low Q10, and 1 is partly flat, partly normal. The differences between the species in terms of both absolute positions and slopes of the R-T curves are not related in any consistent way to any of the three testable variables: phylogenetic position, long-term adaptation temperature, and body size. The red muscles of a variety of adult epipelagic fishes, at ecologically realistic temperatures, are shown to be exceptions to the general rule that tissues of ectothermous lower vertebrates have lower metabolic rates than comparable tissues of non-torpid endothermous higher vertebrates. This circumstance probably is a major factor in the great capacities for sustained high-speed swimming shown by most epipelagic fishes. Other physiological and ecological implications of the results are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00383554
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  • 4
    Electronic Resource
    Electronic Resource
    Comparative studies on the metabolism of shallow-water and deep-sea marine fishes. I. White-muscle metabolism in shallow-water fishes (1972)
    Springer
    Marine biology 13 (1972), S. 222-237 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Maximal rates of oxygen consumption in vitro have been measured under standardized conditions at three test temperatures (5°, 15°, and 25°C) on minced preparations of white muscle from 39 species of shallow-water marine teleost fishes. These fishes came from four different geographic areas, two with cool average water-temperatures (near 15°C: coastal southern California, Galápagos Islands) and two with warm average water-temperatures (near 25°C: Hawaiian Islands; Bermuda). The group includes species covering much of the range of variation to be found among the teleosts with respect to five additional variables: phylogenetic position, type of environment, body weight, activity level, and growth stage. The purpose of the work is to provide part of a base line of tissue-metabolism data on shallow-water fishes for comparison with similar results from deep-sea species. Major conclusions from statistical analyses of the results are: four groups of shapes of oxygen-uptake rate versus temperature curves exist: normal, flat, dipped and peaked. Over 50% of curves are normal. Intra-group differences, contributing significantly to the total variance of the results at given test temperatures, are: cool versus warm average environmental temperatures primarily for epipelagic species; epipelagic versus non-epipelagic environments; very active species versus all others; juvenile stages versus adults. In each case, the subgroup first mentioned shows higher muscle oxygen-uptake rates than the other subgroup. Variables not contributing significantly to the total variance are phylogenetic position and body weight. Physiological and ecological implications of these results are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00391380
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  • 5
    Electronic Resource
    Electronic Resource
    Enhancement of mycobactericidal activity of glutaraldehyde with α,β-unsaturated and aromatic aldehydes (1994)
    Springer
    Journal of industrial microbiology and biotechnology 13 (1994), S. 77-82 
    Details
    ISSN: 1476-5535
    Keywords: Glutaraldehyde ; Mycobactericidal ; Aldehydes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Several α,β-unsaturated and aromatic aldehydes were evaluated for antimicrobial activity usingMycobacterium bovis as the test strain. Activity of most of the compounds was determined in the presence and absence of 2% glutaraldehyde. Several compounds highly active against this organism, e.g. 2-pentenal, benzaldehyde, ando-phthalaldehyde showed rapid kill of 〉105 CFU ml−1 in 5 min. Activity of α,β-unsaturated compounds substituted in the β1 position showed increasing activity with increasing chain length. Of the aromatic aldehydes tested, benzaldehyde andp-dimethylamino benzaldehyde showed little activity alone, but when combined with 2% glutaraldehyde showed increased activity. Substituents added to the benzaldehyde ring (nitro, chloro, methyl, and methoxy) all detracted from the synergism, but still showed increased activity over the activity of 2% glutaraldehyde. The same affect was noted with disubstituted benzaldehyde compounds but not with substitutedo-phthaladehyde (2-formylformaldehyde).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01584102
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  • 6
    Electronic Resource
    Electronic Resource
    Temperature and density measurements in a recombining argon plasma with diluent (1993)
    Springer
    Plasma chemistry and plasma processing 13 (1993), S. 365-378 
    Details
    ISSN: 1572-8986
    Keywords: Nonequilibrium ; plasma mixtures ; temperature measurements
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract Spectroscopic and callorimetric measurements of temperature arid number density have been made using a 50-kW radio-frequency inductively coupled plasma (RFICP) torch operated at atmospheric pressure with maximum temperatures and electron densities near 8,1000 K and 2 x 1021 m3, respectively These measurements enabled the determination o/ the stale o/ equilibrium and of the corresponding applicability of rarious diagnostic techniques in hoth a recombining argon plasma and a recombining plasma with hydrogen or nitrogen. Results indicate that the Pure argon plasma is well described by u partial equilibrium model in which the free and bound-excited electrons are in mutual equilibrium irespective of possible departures from equilibrium with the ground state. The addition of just tenths of a percent of either atomic Hydrogen or nitrogen, however, disturbs this partial equilibrium hr argon plasmas with electron densities roughly less than 1021 m3 such that only diagnostic techniques which are independent o/ partial equilibrium assumptions can be reliably implemented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01465871
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  • 7
    Electronic Resource
    Electronic Resource
    Effects of platelet-activating factor on single potassium channel currents in guinea pig ventricular myocytes (1990)
    Springer
    Molecular and cellular biochemistry 93 (1990), S. 69-76 
    Details
    ISSN: 1573-4919
    Keywords: platelet-activating factor ; potassium channels ; cardiac electrophysiology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract Platelet-activating factor (PAF) has been implicated as one of the mediators of cardiac anaphylaxis. This phospholipid has been shown to have numerous effects on a variety of tissues, including the heart. Among these effects are alterations in the resting potential and generation of arrhythmias at very low concentrations. This suggests that PAF may modulate the activity of the background, inwardly-rectifying potassium current (IK1). Thus, the effects of PAF on IK1 were examined at the single channel level. Ventricular cells were isolated from adult guinea pig hearts and single channel currents recorded from cell-attached patches. PAF had substantial effects on the single channel currents at sub-nanomolar concentrations (10−11 to 10−10 M). PAF initially caused flickering of the channels, followed by a gradual prolonged depression of channel activity. Since these potassium channels play a major role in determining the resting potential and excitability of the cardiac cell, the effects of PAF on IK1 may play a major role in the deleterious electrophysiological actions of PAF on the heart.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00223494
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  • 8
    Electronic Resource
    Electronic Resource
    A comparative analysis of scoring methods for chemical discrimination of prey by squamate reptiles (1990)
    Springer
    Journal of chemical ecology 16 (1990), S. 45-65 
    Details
    ISSN: 1573-1561
    Keywords: Reptilia ; tongue-flicks ; broad-headed skink ; Eumeces laticeps ; garter snake ; Thamnophis sirtalis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract In studies of squamate responses to prey chemicals presented on cotton-tipped applicators, investigators typically record several responses, each of which gives only part of the overall picture. The tongue-flick/attack score (TFAS) is a widely used composite measure of response strength that accounts for attack, its latency, and number of tongue-flicks. We present data and analyses on these variables and investigate the utility of several other possible response variables. It is concluded, for both practical and theoretical reasons, that TFAS and two modifications of it are the best measures of response strength. Uses and statistical analyses of TFAS and variables derived from it are discussed. It is recommended that information on tongue-flick rate, number of individuals attacking, and latency to attack be presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01021267
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  • 9
    Electronic Resource
    Electronic Resource
    Comparative studies on the metabolism of shallow-water and deep-sea marine fishes. III. Apparatus for studies of tissue preparations under high hydrostatic pressures (1974)
    Springer
    Marine biology 28 (1974), S. 73-77 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Design information is given for hydrostatic-pressure apparatus permitting either intermittent or continuous monitoring of the rates of nonoptically observable biochemical and physiological processes in the fluids supporting surviving preparations of living tissues or tissue fractions. Semi-micro scale experiments can be carried out over the full range of temperatures and hydrostatic pressures occurring in the oceans of the world. Samples are obtained at 1 atm pressure, whatever the experimental pressure. The apparatus is simple to use, safe, reliable, and readily portable for work on shipboard. Specially designed components described in detail are: magnetically stirred pressure vessels, sampling valves, and magnetic stirrer drive.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00389119
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  • 10
    Electronic Resource
    Electronic Resource
    Effect of nutrient pulse concentration and frequency on growth ofGracilaria chilensis plants and levels of epiphytic algae (1993)
    Springer
    Journal of applied phycology 5 (1993), S. 525-533 
    Details
    ISSN: 1573-5176
    Keywords: Gracilaria chilensis ; growth ; nutrient pulses ; epiphyte abundance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The effect of nutrient pulse concentration and frequency onGracilaria chilensis Bird, McLachlanet O Oliveira growth and epiphyte abundace was investigated for plants grown in an indoor culture facility. The frequency of nutrient pulses (which ranged from 1 pulse to 4 pulses per 14 days) had a strong influence on plant growth, while pulse concentration (from 72 to 143 µM as ammonium) had a lesser influence. Growth became a function of total N flux only when plants received nutrient pulses at least twice per 14 days. Both pulse frequency and pulse concentration affected the abundance of epiphytic algae found attached toGracilaria thalli, but pulse frequency was the more significant of the two factors. Their effects could be combined into the single factor, total N flux. Both reasonableG. chilensis growth and low levels of epiphytes were achieved under these conditions (20 °C, 25 µ mol photon m−2 s−1 PAR) if ammonium was pulsed at relatively high concentrations (up to 150 µM) once every 7 days into otherwise nitrogen-depleted seawater.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02182511
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