La enseñanza de la biología y en particular las representaciones alrededor fenómenos a escala microscópica representa un desafío para el profesorado, tanto por nivel abstracción necesaria, como necesidad instrumental específico que contribuya construcción científicas escolares. En este trabajo se presenta diseño evaluación modelo microscopio bajo costo, denominado “Micro-Hoek”, ambientes escola...

Complex coupled thermo-hydromechanical (THM) loading paths are expected to occur in clay rocks which serve as host formations for geological radioactive waste repositories. Exothermic packages heat the rock, causing thermal strains and temperature induced pore pressure build-up. The drifts designed such a way limit these effects. One has anticipate failure fracturing of material, should pressur...

Floor heaving is a phenomenon that occurs in almost all mining roadways and tunnels. It can restrain the advance of heading face or cause serious problems during roadway use. The highest levels floor uplifting are observed coal mines, which reduce output even stop it altogether. intensity depends on rock type, stress mass, rocks’ mechanical properties. deformation develops when secondary state ...

Purpose. To develop techniques for estimating the pit wall stability in terms of occurring a zone heavily jointed rock mass during ore mining at Akzhal deposit (Kazakhstan), to work out measures strengthen opening and verify effectiveness developed measures. Methodology. The finite element analysis stress-strain state is implemented on basis elastic-plastic model generalized Hoek-Brown failure ...

CHIP28 is a major water transporting protein in erythrocytes and kidney which forms tetramers in membranes (Verbavatz, J. M., Brown, D., Sabolic, I., Valenti, G., Ausiello, D. A., Van Hoek, A. N., Ma, T., and Verkman, A. S. (1993) J. Cell Biol. 123, 605-618). To determine whether CHIP28 monomers function independently, chimeric cDNA dimers were constructed which contained wild-type CHIP28 in se...

Abstract The failures of volcanic crater-rims frequently lead to the development avalanches glowing rocks, a hybrid phenomenon between rock and pyroclastic density currents, reaching considerable distances from eruptive centres therefore be serious threat for inhabited areas. collapse conditions have been here taken in account by means slope stability analysis using Limit Equilibrium Method on ...

Antonie J. W. G. Visser,*,† Petra A. W. van den Berg,† Nina V. Visser,† Arie van Hoek,† Harrold A. van den Burg,‡ Derek Parsonage,‡ and Al Claiborne‡ MicroSpectroscopy Centre, Department of Biomolecular Sciences, Wageningen Agricultural UniVersity, P.O. Box 8128, NL-6700 ET Wageningen, The Netherlands, and Department of Biochemistry, Wake Forest UniVersity Medical Center, Winston-Salem, North C...

Anna Karakatsani ([email protected]) Antonis Analitis ([email protected]) Dimitra Perifanou ([email protected]) Jon G Ayres ([email protected]) Roy M Harrison ([email protected]) Anastasia Kotronarou ([email protected]) Ilias G Kavouras ([email protected]) Juha Pekkanen ([email protected]) Kaarle Hameri ([email protected]) Gerard P.A. Kos ([email protected]) Jeroen J de Hartog ...