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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Capability and limitations in laboratory determination of stiffness parameters of soils

100%
Lipinski M. J., Wdowska M. K.
Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation
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2015
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tom 47
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nr 2
Capability and limitations in laboratory determination of stiffness parameters of soils. The paper concerns laboratory methods for determination of soil stiffness. Major criterion for selection of analysed equipment is range of strain in which stiffness can be reliably determined. Substantially, various confi gurations of triaxial apparatus are referred to i.e. with standard cell and with the modifi ed one. Additional system for internal measurement of strain is described and rational (based on test results) for use of it is presented. As to shear wave velocity measurement as a mean to obtain initial stiffness, requirements for proper measurement and interpretation was given. Finally, an approach to determine Poisson’s ratio on the basis of combined results of cyclic triaxial and resonant column tests was presented.
2

Purification and partial characterization of pyoverdine synthesized by Pseudomonas putida

72%
Jankiewicz U., Kuzawinska O.
Electronic Journal of Polish Agricultural Universities. Series Agronomy
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2009
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tom 12
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nr 1
3

Application of photogrammetry to the determination of the parameters of soil strains

72%
Baranski T., Wolski W.
Annals of Warsaw Agricultural University. Land Reclamation
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1986
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tom 22
4
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Content available

Small-strain dynamic characterization of clayey soil

72%
Gabrys K., Sas W., Sobol E.
Acta Scientiarum Polonorum. Architectura
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2015
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tom 14
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nr 1
An appropriate evaluation of dynamic soil properties is important for proper seismic response analysis and soil modelling programs. The primary aim of this study was to investigate the dynamic properties of clayey soil from Warsaw area, taking into consideration some of the selected factors affecting the shear modulus (G) and the damping ratio (D) of examined samples. A series of resonant column tests were conducted to study the effect of applied pressure and shear strain amplitude on soil stiffness and its damping properties. These parameters were reviewed, investigated and discussed. On the basis of the results obtained from these tests as well as the theoretical analysis, it can be established that confining pressure and the range of considered strain had a significant influence on the dynamic shear modulus and on the dynamic damping ratio. The impact of stress level on D is also discussed.
5

RAPD techniques is a useful tool to distinguish Penicillium species

72%
Bakri Y., Arabi M. I. E., Jawhar M.
Polish Journal of Microbiology
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2007
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tom 56
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nr 4
Random amplified polymorphic DNA (RAPD) analysis was used to evaluate genetic diversity among 13 soil Pénicillium strains originating from widely dispersed areas. Twenty one of the 34 synthetic random primers were found to identify polymorphism in amplification products. The results show a high level of diversity of RAPD markers among the strains. All the strains could be identified by their characteristic amplification profile, using selected random primers. This suggests that RAPD analysis is a useful and reliable assay for characterizing the species of Pénicillium genus.
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