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  • Pisum  (6)
  • Coleoptera  (5)
  • oxidation
  • Springer  (14)
  • Annual Reviews
  • 1980-1984  (14)
  • 1975-1979
  • 1980  (14)
Collection
Keywords
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  • Springer  (14)
  • Annual Reviews
Years
  • 1980-1984  (14)
  • 1975-1979
Year
  • 1
    Electronic Resource
    Electronic Resource
    The oxidation of Ni-70 wt.%Cr in oxygen between 1073 and 1473°K (1980)
    Springer
    Oxidation of metals 14 (1980), S. 263-277 
    Details
    ISSN: 1573-4889
    Keywords: oxidation ; Ni-Cr alloys ; two-phase alloys
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Oxidation of the relatively simple, two-phase alloy Ni-70 wt.%Cr in oxygen between 1073 and 1473°K results in the formation of a Cr2O3 scale containing less than O.5 wt.% Ni in solid solution. The oxidation kinetics are irreproducible for an initial period, which is brief at 1073 and 1273°K but much more pronounced at 1473°K, both in duration and degree. This behavior is associated with the failure of the protective Cr2O3 scale. However, after longer periods a compact layer of Cr2O3 becomes established under isothermal conditions and results in a change to more reproducible kinetics, especially at 1073 and 1273°K. Oxidation causes chromium depletion and the formation of a single-phase zone which separates the scale and the two-phase bulk alloy. The depth of Cr2O3 internal oxide coincides with this zone. The oxidation behavior is compared with that of more Ni-rich, single-phase Ni-Cr alloys, with particular reference to the effects of the constitution of the underlying alloy and the integrity of the protective oxide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00604568
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  • 2
    Electronic Resource
    Electronic Resource
    Cell length, light and14C-labelled indol-3yl-acetic acid transport inPisum satisum L. andPhaseolus vulgaris L (1980)
    Springer
    Planta 149 (1980), S. 327-331 
    Details
    ISSN: 1432-2048
    Keywords: Auxin transport ; Cell length ; Light and auxin transport ; Phaseolus ; Pisum ; Transport (auxin)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The putative auxin-transporting cells of the intact herbaceous dicotyledon are the young, differentiating vascular elements. The length of these cells was found to be considerably greater in dwarf (Meteor) than in tall (Alderman) varieties ofPisum sativum L., and to be greater in etiolated than in light-grown plants ofP. sativum cv Meteor andPhaseolus vulgaris L. cv Mexican Black. Under given light conditions during transport these large differences in cell length did not influence the shapes of the transport profiles or the velocity of transport of14C-labelled indol-3yl-acetic acid (IAA) applied to the apical bud. However, in both etiolated and light-grown bean and dwarf pea plants the velocity of transport in darkness was ca. 25% lower than that in light. Under the same conditions of transport velocities in bean were about twice those observed in the dwarf pea. Exposure to light during transport increased the rate of export of14C from the labelled shoot apex in green dwarf pea plants but not in etiolated plants. The light conditions to which the plants were exposed during growth and transport had little effect on the rates of uptake of IAA from the applied solutions. The results indicate that the velocity of auxin transport is independent of the frequency of cell-to-cell interfaces along the transport pathway and it is suggested that in intact plants auxin transport is entirely symplastic.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00571165
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  • 3
    Electronic Resource
    Electronic Resource
    The initiation of legumin synthesis in immature embryos of Pisum sativum L. grown in vivo and in vitro (1980)
    Springer
    Planta 149 (1980), S. 454-460 
    Details
    ISSN: 1432-2048
    Keywords: Embryo culture ; Enzyme-linked immunosorbent assay (ELISA) ; Legumin ; Pisum ; Protein (storage) ; Storage protein
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A highly sensitive immunoassay has been used for the detection of a major storage protein, legumin, in embryos of Pisum sativum L.; with this technique nanogram quantities could be measured. In the two varieties tested, legumin could be detected in embryos in vivo, when they had attained a fresh weight of 2·10-3 g and 3·10-3 g, respectively. Contrary to earlier claims, embryos cultured in vitro were shown to be capable of initiating legumin synthesis. This capacity to initiate legumin synthesis was confirmed by two-dimensional isoelectric focusing-electrophoresis and fluorography; embryos harvested before initiation of legumin synthesis and cultured in radioactive medium were shown to have synthesized legumin subunits. The amounts of legumin and total protein synthesized per unit fresh weight were consistently greater in vitro than in equivalent embryos grown in vivo.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00385747
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  • 4
    Electronic Resource
    Electronic Resource
    The influence of small direct electric currents on the transport of auxin in intact plants (1980)
    Springer
    Planta 150 (1980), S. 431-434 
    Details
    ISSN: 1432-2048
    Keywords: Auxin transport ; Electric current ; Pisum ; Potential gradients
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract When a d.c. potential of 9.0 V was applied to the stem of intact pea seedlings (Pisum sativum L. cv. Meteor and cv. Alderman) via 10 mM KCl-soaked filter paper electrodes placed ca. 50 mm apart the stem passed a steady current of 15–20 μA (resistance ca. 100 kΩ cm-1). The basipetal transport of [1-14C]IAA applied to the apical bud was completely inhibited over the portion of the stem through which current flowed and 14C-labelled compounds accumulated in the vicinity of the upper electrode. The inhibition of transport was independent of the polarity of the applied potential. The basipetal transport of IAA in the stem above the electrode was not affected. Labelled auxin accumulated at the upper electrode both as unchanged IAA and as a compound tentatively identified as indol-3yl-acetyl aspartic acid (IAAsp). These compounds were only slowly remobilised when the current was interrupted. However, the ability of the transport system to move freshly-applied IAA was rapidly and fully restored when the potential was removed. No injury to the plant was detected after maintaining a current flow for up to 72 h. No leakage of 14C-labelled compounds into the KCl solution bathing the electrodes was detected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00390181
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  • 5
    Electronic Resource
    Electronic Resource
    Characterisation of the storage protein subunits synthesised in vitro by polyribosomes and RNA from developing pea (Pisum sativum L.) (1980)
    Springer
    Planta 148 (1980), S. 49-56 
    Details
    ISSN: 1432-2048
    Keywords: Legumin ; Pisum ; Protien synthesis ; RNA ; Storage protein
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Evidence is presented to show that legumin, the major storage protein in Pisum, is synthesised in vitro by the wheat germ and reticulocyte lysate systems, from polyribosomes and mRNA isolated from developing pea seeds. While legumin isolated from mature pea seeds consists of 40,000 and 20,000 MW subunits, the in vitro legumin is synthesised as a 60,000 MW precursor consisting of covalently linked 40,000 and 20,000 MW subunits. The implications of these findings are discussed in relationship to studies with other systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00385441
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  • 6
    Electronic Resource
    Electronic Resource
    Characterisation of the storage protein subunits synthesised in vitro by polyribosomes and RNA from developing pea (Pisum sativum L.) (1980)
    Springer
    Planta 148 (1980), S. 57-63 
    Details
    ISSN: 1432-2048
    Keywords: Pisum ; Polyribosomes ; Post translational modifications ; Protein synthesis ; Storage proteins
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Polypeptide material has been immunoprecipitated by antivicilin antibodies from translation products of polyribosomes and poly(A)-rich RNA isolated from developing seeds of Pisum sativum in the wheat germ and reticulocyte lysate cell-free synthesis systems. Analysis of this material by SDS-PAGE shows it to consist of three bands, of molecular weights 70,000, 50,000 and 47,000. The in vitro vicilin polypeptides of 70,000 and 50,000 mol. wt. have been shown to be very similar to the 70,000 and 50,000 mol. wt. subunits of vicilin by specific immunoprecipitation, and behaviour on treatment with cyanogen bromide and trypsin. The 50,000 mol. wt. in vitro vicilin polypeptide contains no significant extra sequence compared to the 50,000 mol. wt. vicilin subunit. The 47,000 mol. wt. in vitro vicilin polypeptide has no corresponding subunit in vicilin from mature seeds, but a 47,000 mol. wt. subunit is present in vicilin isolated from developing seeds. Comparison of translation products from polysomes isolated from seeds at middle and late stages of development shows that synthesis of the 50,000 and 47,000 mol. wt., but not 70,000 mol. wt. polypeptides is very much reduced at late stages of development. These results are discussed with reference to the nature of the vicilin fraction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00385442
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  • 7
    Electronic Resource
    Electronic Resource
    Influence of small Pt additions on Al2O3 scale adherence (1980)
    Springer
    Oxidation of metals 14 (1980), S. 517-530 
    Details
    ISSN: 1573-4889
    Keywords: CoCrAl ; oxidation ; oxide-scale adherence ; platinum ; rare-earth effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The effects of small Pt additions (1 or 3 wt.%) on the oxidation behavior of Co-10Cr-11Al and a similar alloy containing Hf have been studied. An intermetallic phase was present in the alloy containing Hf and Pt but not in that containing Pt alone. The size and distribution of the intermetallic was comparable to that of similar alloys containing oxide dispersions produced by a controlled internal oxidation treatment. As a consequence it promoted the formation of inwardly growing Al2O3 pegs that helped key the surface scale to the substrate and improve the scale-metal adhesion in both isothermal and cyclic oxidation tests. The improvement in overall oxidation resistance relative to an addition-free alloy was considerable, and similar to that of the best oxide dispersion-containing alloys.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00603477
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  • 8
    Electronic Resource
    Electronic Resource
    Enantiomer-based specificity in pheromone communication by two sympatricGnathoirichus species (Coleoptera: Scolytidae) (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 445-456 
    Details
    ISSN: 1573-1561
    Keywords: Gnathotrichus retusus ; G. sulcatus ; Coleoptera ; Scolytidae ; ambrosia beetle ; aggregation pheromone ; 6-methyl-5-hepten-2-ol ; sulcatol ; reproductive isolation ; enantiomers ; chiral compounds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The aggregation pheromone ofGnathotrichus retusus was isolated and identified as (S)-(+)-sulcatol (6-methyl-5-hepten-2-ol). In laboratory and field experiments,G. retusus responded to (S)-(+)-sulcatol, but not to (±)-sulcatol, which was attractive to the sympatric species,G. sulcatus. G. sulcatus did not respond to optically pure (S)-(+)-sulcatol, but began to respond when ⩾ 1% (R)-(−)-sulcatol was present in an enantiomeric mixture.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01402921
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  • 9
    Electronic Resource
    Electronic Resource
    Estimating western pine beetle-caused tree mortality for evaluating an attractive pheromone treatment (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 853-866 
    Details
    ISSN: 1573-1561
    Keywords: Ponderosa pine mortality ; Dendroctonus brevicomis ; Coleoptera ; Scolytidae ; aerial photography ; detection ; estimation ; sampling ; mapping ; attractive pheromones
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Sequential aerial photography was used to detect ponderosa pine trees killed by successive generations of the western pine beetle (WPB),Dendroctonus brevicomis Lec., over a three-year period during a study to evaluate the effectiveness of attractive pheromones for the suppression and survey of WPB. The total number of WPB-killed trees were estimated for each generation, using probability-proportional-to-size sampling procedures. Infested trees at the beginning of the suppression treatment totaled 283. Attacks by three successive WPB generations in 1970 killed 90,83, and 91 trees, respectively. The first generation in 1971 killed 47 trees and the two subsequent generations combined killed a total of 49 trees. During the suppression treatment, tree mortality was concentrated into the suppression plots in comparison to the check plots and the surrounding area. By 1972, tree mortality distribution returned to its original pattern, but at one-tenth the original level, as shown by maps. Recommendations suggest ways to improve the use of aerial photography for studies of WPB-caused tree mortality and population dynamics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00990469
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  • 10
    Electronic Resource
    Electronic Resource
    ESCA study of oxidation and hot corrosion of nickel-base superalloys (1980)
    Springer
    Oxidation of metals 14 (1980), S. 415-435 
    Details
    ISSN: 1573-4889
    Keywords: oxidation ; hot corrosion ; ESCA ; superalloys ; sodium sulfate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A study of the high-temperature oxidation and Na2SO4-induced hot corrosion of some nickel-base superalloys has been accomplished by using ESCA to determine the surface composition of the oxidized or corroded samples. Oxidation was carried out at 900 or 1000°C in slowly flowing O2 for samples of B-1900, NASA-TRW VIA, 713C, and IN-738. Oxidation times ranged from 0.5 to 100 hr. Hot corrosion of B-1900 was induced by applying a coating of Na2SO2 to preoxidized samples, then heating to 900° C in slowly flowing O2. Corrosion times ranged from 5 min to 29 hr. For oxidized samples, the predominant type of scale formed by each superalloy was readily determined, and a marked surface enrichment of Ti was found in each case. For corroded samples, the transfer of significant amounts of material from the oxide layer to the surface of the salt layer was observed to occur long before the onset of rapidly accelerating weight gain. Some marked changes in surface composition were observed to coincide with the beginning of accelerating corrosion, the most striking of which were a tenfold decrease in the sulfur to sodium ratio and an increase in the Cr(VI) to Cr(III) ratio.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00603610
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