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  • Springer  (198)
  • Public Library of Science (PLoS)
  • 1995-1999  (121)
  • 1970-1974  (61)
  • 1965-1969  (12)
  • 1935-1939  (4)
Collection
Keywords
Publisher
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Inactivation of polycaprolactone depolymerase (cutinase) in Fusarium cultures by an extracellular protease (1999)
    Springer
    Journal of industrial microbiology and biotechnology 22 (1999), S. 71-77 
    Details
    ISSN: 1476-5535
    Keywords: Keywords: Fusarium moniliforme; cutinase; polycaprolactone depolymerase; acid protease; biodegradable polymer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Cultures of Fusarium moniliforme grown on polycaprolactone (PCL) or on cutin as a sole source of carbon and energy had low levels of detectable PCL depolymerase (cutinase) activity in the supernatant medium. A small peak of depolymerase activity was observed after hyphal accumulation had ceased, but this activity soon declined. The low level of the peak of activity and its decline were attributable to proteolytic inactivation of the depolymerase. A decrease in the pH of cultures coincided with the appearance of protease activity in the supernatant at about the same time as the appearance of the transient peak of depolymerase activity. Addition of protease substrates (bovine serum albumin, casein) to the culture at this time caused a dramatic although temporary increase in PCL depolymerase activity. The same effect was seen for cultures of F. solani pisi. Use of a different buffer system for the medium prevented a drop in pH and resulted in higher and stable levels of PCL depolymerase activity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/sj.jim.2900605
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  • 2
    Electronic Resource
    Electronic Resource
    GPS Solutions for the Verification and Resolution of GIS Coordinate Database (1995)
    Springer
    GPS solutions 1 (1995), S. 129-138 
    Details
    ISSN: 1521-1886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/
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  • 3
    Electronic Resource
    Electronic Resource
    An in vivo comparison of the photodynamic action of a new diode laser and a copper vapour dye laser at 652 nm (1996)
    Springer
    Lasers in medical science 11 (1996), S. 117-121 
    Details
    ISSN: 1435-604X
    Keywords: Photodynamic therapy ; Diode laser ; mTHPC ; Depth of necrosis ; Normal rat liver
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Physics , Technology
    Notes: Abstract Initial pre-clinical evaluation of a new 652 nm diode laser system for photodynamic therapy was performed to establish its efficacy in photo-activating the second-generation photosensitizer meta-tetrahydroxyphenychlorin (mTHPC). The diode laser was compared directly to a copper vapour laser pumped dye laser using depth of necrosis in normal rat liver as a measure of the photodynamic effect. No significant difference between the two lasers was observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02133208
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  • 4
    Electronic Resource
    Electronic Resource
    Colour and odour responses of flying western flower thrips: wind tunnel and greenhouse experiments (1999)
    Springer
    Entomologia experimentalis et applicata 93 (1999), S. 9-19 
    Details
    ISSN: 1570-7458
    Keywords: Frankliniella occidentalis ; western flower thrips ; host-finding ; flight behaviour ; odour ; colour ; anisaldehyde ; chemokinesis ; trapping
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The behavioural responses of flying western flower thrips (Frankliniella occidentalis Pergande) (Thysanoptera: Thripidae) to the colour yellow and the odour anisaldehyde were examined. In a wind tunnel, upwind flight by female thrips was common in an airflow of 0.11 m s−1 but was impeded at 0.22 m s−1. In the absence of anisaldehyde, flying female thrips exhibited an oriented response towards a yellow cue in the wind tunnel at a wind speed of 0.11 m s−1. The main response of females to anisaldehyde in the wind tunnel was flight inhibition. There was no evidence of an odour-induced visual response, an odour-induced anemotactic response or chemotaxis by female thrips to anisaldehyde in wind tunnel bioassays, but chemokinesis was implicated. With a matrix of yellow or black water traps with and without anisaldehyde in a greenhouse sweet pepper crop, yellow traps with anisaldehyde caught more thrips adults than yellow traps without anisaldehyde, black traps with anisaldehyde and black traps without anisaldehyde (1.3, 28 and 721 times for males respectively and 2.4, 9 and 117 times for females, respectively). Differences between respective traps were statistically significant in almost all cases. Trapping experiments using a centre-baited trap design to reduce the interaction of anisaldehyde between baited and unbaited traps were undertaken in tomato and sweet pepper greenhouse crops. When the spatial distribution of the thrips adult population within the greenhouse was taken into account, yellow water traps with anisaldehyde caught between 11 and 15 times more female and 3 and 20 times more male F. occidentalis adults than yellow traps without anisaldehyde.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003893905051
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  • 5
    Electronic Resource
    Electronic Resource
    Crystal structure of 5,5-dimethyl-2-p-bromophenylimino-Δ3-1,3,4-oxadiazoline (1973)
    Springer
    Journal of chemical crystallography 3 (1973), S. 71-78 
    Details
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Oxidation of acetone-4-p-bromophenylsemicarbazone with lead tetraacetate yields only one isomer of 5,5-dimethyl-2-p-bromophenylimino-Δ3-1,3,4-oxadiazoline, C10H10BrN3O. Crystals of this compound are triclinic, space groupP¯1,a = 5·91(1),b = 9·52(1),c = 11·59(2) Å, α =114·1(1) °, β = 93·5(1) ° and γ = 108·8(1) °;z = 2 and the chemical composition is C10H10BrN3O. Of 2306 independent reflexions examined, 877 were strong enough to be measured with integrated precession photographs using MoKα radiation. The structure was refined using a full-matrix least-squares program to a finalR value of 0·064. The structure consists of planar phenyl and oxadiazoline rings, with a van der Waals interaction between a phenyl hydrogen atom and oxygen atom of the five member ring preventing the two rings from being co-planar; the H(13)-O(1) separation is 2·47 Å. TheZ-configuration of the product suggests a specific mechanism for the ring closure involving an organolead intermediate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01237429
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  • 6
    Electronic Resource
    Electronic Resource
    Bis(triphenylphosphoranylidene)ammonium tetraethylborate, (Ph3P)32N+BEt34-: preparation and structure (1998)
    Springer
    Journal of chemical crystallography 28 (1998), S. 919-924 
    Details
    ISSN: 1572-8854
    Keywords: BEt4 - anion ; complex cations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The compound (Ph3P)32N,+BEt4 - is readily prepared from (Ph3P)2N+Cl− and LiBHEt3. The NMR spectrum (1H, 13C. 11B, 33P) are reported. C44H50NBP2 M = 665.64, Triclinic, Pī (#2), a = 11.530(4), b = 15.397(9), c = 11.497(9) Å, α = 102.94(6), β = 102.87(4), γ = 89.34(4)°, V = 1938(4) Å3, and Z= 2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022858704955
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  • 7
    Electronic Resource
    Electronic Resource
    The structural characterization of YbI2(DME)3 (1999)
    Springer
    Journal of chemical crystallography 29 (1999), S. 1107-1110 
    Details
    ISSN: 1572-8854
    Keywords: crystal structure ; ytterbium ; lanthanide ; coordination complex
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The preparation and structural characterization of [YbI2(DME)2] are reported. The complex crystallizes in the triclinic space group P 1¯: a = 13.0094 (10), b=14.504(3), c = 14.668 (3) Å, α = 115.281(10) β = 106.74(2), γ = 105.97(2)°. The metal center of the complex exhibits a distorted pentagonal bipyramidal coordination geometry which involves a rare example of a monodentate DME ligand.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009557708382
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  • 8
    Electronic Resource
    Electronic Resource
    A Review of the Relationship Between Thermally-Accelerated Ageing of Paper and Hornification (1999)
    Springer
    Cellulose 6 (1999), S. 23-40 
    Details
    ISSN: 1572-882X
    Keywords: paper ; cellulose ; hornification ; accelerated aging ; hydrogen bonding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract A link is drawn between paper hornification and low temperature thermally-accelerated ageing of paper based on a review of existing research. Similarities between treatment temperature, humidity, resultant physical properties, and possible degradation mechanisms are enumerated. Hornification can be explained by irreversible intra-fibre hydrogen bonding, whereas accelerated ageing is normally attributed to chain scission and cross linking. However, in the light of the similar experimental protocols used to investigate each, the possibility of both mechanisms occurring in both experiments should be considered. The short timescales of hornification would seem to preclude chain scission and cross linking, but it seems possible that irreversible hydrogen bonding occurs during dry accelerated ageing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009292120151
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  • 9
    Electronic Resource
    Electronic Resource
    Cycle-closed permutation groups (1996)
    Springer
    Journal of algebraic combinatorics 5 (1996), S. 315-322 
    Details
    ISSN: 1572-9192
    Keywords: Permutation group ; cycle ; Hopf algebra ; Fourier series
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract A finite permutation group is cycle-closed if it contains all the cycles of all of its elements. It is shown by elementary means that the cycle-closed groups are precisely the direct products of symmetric groups and cyclic groups of prime order. Moreover, from any group, a cycle-closed group is reached in at most three steps, a step consisting of adding all cycles of all group elements. For infinite groups, there are several possible generalisations. Some analogues of the finite result are proved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00193181
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  • 10
    Electronic Resource
    Electronic Resource
    Vertex-Transitive Non-Cayley Graphs with Arbitrarily Large Vertex-Stabilizer (1998)
    Springer
    Journal of algebraic combinatorics 8 (1998), S. 29-38 
    Details
    ISSN: 1572-9192
    Keywords: symmetric graph ; vertex-transitive ; arc-transitive
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract A construction is given for an infinite family {Γn} of finite vertex-transitive non-Cayley graphs of fixed valency with the property that the order of the vertex-stabilizer in the smallest vertex-transitive group of automorphisms of Γn is a strictly increasing function ofn . For each n the graph is 4-valent and arc-transitive, with automorphism group a symmetric group of large prime degree $$p 〈 2^{2^n + 2}$$ . The construction uses Sierpinski's gasket to produce generating permutations for the vertex-stabilizer (a large 2-group).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008687226819
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