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  • 1
    Electronic Resource
    Electronic Resource
    Changing Concepts in the Taxonomy of Plant Pathogenic Bacteria (1992)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Phytopathology 30 (1992), S. 67-105 
    Details
    ISSN: 0066-4286
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.py.30.090192.000435
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  • 2
    Electronic Resource
    Electronic Resource
    Root mat of tomato caused by rhizogenic strains of Agrobacterium biovar 1 in the UK (2000)
    Oxford, UK : Blackwell Science Ltd
    Plant pathology 49 (2000), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3059.2000.00502.x
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  • 3
    Electronic Resource
    Electronic Resource
    Bacterial soft rot of Agaricus bitorquis (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 40 (1991), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: A new pathovar of Pseudomonas gladioli, pv. agaricicola is described to accommodate a bacterium pathogenic to Agaricus bitorquis. The bacterium causes a rapid soft rot of cultivated mushrooms at temperatures above 25 C. The pathotype culture has been deposited at the National Collection of Plant Pathogenic Bacteria, Harpenden, UK and designated NCPPB 3580.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1991.tb02302.x
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  • 4
    Electronic Resource
    Electronic Resource
    Induction of root-mat symptoms on cucumber plants by Rhizobium, but not by Ochrobactrum or Sinorhizobium, harbouring a cucumopine Ri plasmid (2005)
    Oxford, UK : Blackwell Science Ltd
    Plant pathology 54 (2005), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Ochrobactrum CSL 2573, Rhizobium CSL 2411 and Sinorhizobium CSL 2611 strains harbouring the Agrobacterium cucumopine Ri plasmid (pRi), previously were shown to induce root-mat symptoms in an in vitro cucumber cotyledon assay. In whole-plant, rockwool-grown cucumber host tests Rhizobium CSL 2411 was shown to be as efficient an inducer of root-mat symptoms as the virulent Agrobacterium radiobacter strain NCPPB 4042, which also harbours a cucumopine pRi. Conjugal transfer of pRi to ingressing, avirulent Agrobacterium isolates was observed within root tissues with symptoms. Ochrobactrum CSL 2573 and Sinorhizobium CSL 2611 were not able to induce root-mat symptoms on plants. Rhizobium CSL 2411 and Ochrobactrum CSL 2573 were reisolated from inoculated plants, but Sinorhizobium CSL 2611 was not detected or isolated from inoculated plants 68 days after inoculation. It was postulated that the differences in pathogenicity observed between the in vitro and in situ host tests were caused by a lack of proper attachment to inoculated root tissues by pRi-harbouring Ochrobactrum and Sinorhizobium in the whole-plant host tests.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.2005.01283.x
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  • 5
    Electronic Resource
    Electronic Resource
    Effects of Grain Size on the Initiation and Propagation Thresholds of Stress-induced Brittle Fractures (1999)
    Springer
    Rock mechanics and rock engineering 32 (1999), S. 81-99 
    Details
    ISSN: 1434-453X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences
    Notes: Summary The microstructure of rock is known to influence its strength and deformation characteristics. This paper presents the results of a laboratory investigation into the effects of grain size on the initiation and propagation thresholds of stress-induced brittle fracturing in crystalline rocks with similar mineralogical compositions, but with three different grain sizes. Strain gauge and acoustic emission measurements were used to aid in the identification and characterization of the different stages of crack development in uniaxial compression. Results indicate that grain size had only a minor effect on the stress at which new cracks initiated. Crack initiation thresholds were found to be more dependent on the strength of the constituent minerals. Grain size did have a significant effect, however, in controlling the behaviour of the cracks once they began to propagate. The evidence suggests that longer grain boundaries and larger intergranular cracks, resulting from increased grain size, provide longer paths of weakness for growing cracks to propagate along. This promoted degradation of material strength once the longer cracks began to coalesce and interact. Thus, rock strength was found to decrease with increasing grain size, not by inducing crack initiation at lower stresses, but through a process where longer cracks propagating along longer planes of weakness coalesced at lower stresses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s006030050026
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  • 6
    Electronic Resource
    Electronic Resource
    Design of tabular excavations in foliated rock: an integrated numerical modelling approach (1997)
    Springer
    Geotechnical and geological engineering 15 (1997), S. 47-85 
    Details
    ISSN: 1573-1529
    Keywords: Numerical modelling ; mine design ; tabular stopes ; anisotropy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Summary This paper presents a rock mechanics design methodology applicable to steeply dipping orebodies typical of many underground hardrock mines. The first stage in the design process is the characterization of the rock mass using bothin situ and laboratory data. The effects of anisotropy on rock mass behaviour are discussed with reference to laboratory and field observations. The second stage involves the use of a number of selected numerical modelling techniques to investigate ground response in the near-field rock mass surrounding the mining excavations. This study shows that the use of several numerical methods in conjunction, allowing for the advantages of each method to be maximized, provides a more comprehensive analysis of the different facets of stope design. This approach differs from those in the literature which seek to compare the different numerical methods in order to select just one method best suited for a problem. The design methodology employed emphasizes the importance of developing an understanding of ground deformation mechanisms as opposed to predicting absolute behaviour.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00881238
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  • 7
    Electronic Resource
    Electronic Resource
    Design of tabular excavations in foliated rock: an integrated numerical modelling approach (1997)
    Springer
    Geotechnical and geological engineering 15 (1997), S. 47-85 
    Details
    ISSN: 1573-1529
    Keywords: Numerical modelling ; mine design ; tabular stopes ; anisotropy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract This paper presents a rock mechanics design methodology applicable to steeply dipping orebodies typical of many underground hardrock mines. The first stage in the design process is the characterization of the rock mass using both in situ and laboratory data. The effects of anisotropy on rock mass behaviour are discussed with reference to laboratory and field observations. The second stage involves the use of a number of selected numerical modelling techniques to investigate ground response in the near-field rock mass surrounding the mining excavations. This study shows that the use of several numerical methods in conjunction, allowing for the advantages of each method to be maximized, provides a more comprehensive analysis of the different facets of stope design. This approach differs from those in the literature which seek to compare the different numerical methods in order to select just one method best suited for a problem. The design methodology employed emphasizes the importance of developing an understanding of ground deformation mechanisms as opposed to predicting absolute behaviour.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018439003840
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  • 8
    Electronic Resource
    Electronic Resource
    Giant magnetoresistance in field-annealed Co/Cu multilayer films: discontinuous multilayers? (1996)
    Springer
    Journal of materials science 15 (1996), S. 1145-1148 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: 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/BF00539963
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  • 9
    Electronic Resource
    Electronic Resource
    Detection ofClavibacter michiganensis subsp.sepedonicus in potato stems and tubers grown from seed pieces with various levels of inoculum (1992)
    Springer
    Potato research 35 (1992), S. 207-216 
    Details
    ISSN: 1871-4528
    Keywords: ring rot ; Solanum tuberosum L. ; ELISA ; immunofluorescence ; detection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary An indirect sandwich enzyme-linked immunosorbent assay (ELISA) was used to monitor potato stems of three cultivars for the presence of the ring rot pathogen,Clavibacter michiganensis subsp.sepedonicus, during the growing season and in progeny tubers after harvest. The highest ELISA values were obtained with the highest concentration of bacteria used to inoculate seed pieces in all cultivars tested. Low ELISA values were obtained for stems and progeny tubers selected from plants grown from seed inoculated at lower bacterial concentrations. Estimates of bacterial densities in stems and progeny tubers by immunofluorescence indicated that low ELISA values were most probably caused by low bacterial numbers. It is suggested that the sensitivity of ELISA for detecting the ring rot pathogen in potato stems and progeny tubers is a function of the concentration of bacteria in individual seed pieces.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02357617
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  • 10
    Electronic Resource
    Electronic Resource
    A comparative study in five laboratories on detection ofClavibacter michiganensis subsp.sepedonicus in potato stems and tubers (1992)
    Springer
    Potato research 35 (1992), S. 217-226 
    Details
    ISSN: 1871-4528
    Keywords: ring rot ; Solanum tuberosum L. ; ELISA ; immunofluorescence ; eggplant ; detection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Potato stems and tubers grown in the field from seed tubers inoculated withClavibacter michiganensis subsp.sepedonicus, which causes bacterial ring rot, were tested by indirect, sandwich enzyme-linked immunosorbent assay (ELISA) in five laboratories. Correlation between values for each experimental treatment from the five laboratories was greater (r=0.86) than correlation between values for individual samples (r=0.71). When three or more laboratories obtained ELISA values of ≥0.200 for a sample, that sample was presumed to be positive. Conversely, when three or more laboratories obtained ELISA values 〈0.200, the consensus determination was regarded as negative. The percentage of stem and tuber samples that were in agreement with the consensus ELISA determination varied from 65.5 to 96.7%. Indirect immunofluorescence tests, conducted on the same samples in two laboratories, were consistent with 83.4–91.9% of the consensus ELISA determinations. Presence or absence ofC.m. sepedonicus was confirmed in some samples by an eggplant bioassay and direct isolatiion of the bacterium. The ELISA procedure was well suited for screening large numbers of samples and this study confirms it to be a promising procedure in routine indexing of seed potatoes forC.m. sepedonicus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02357618
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