Technology of Rock Destruction by Combined Explosion-Mechanical Load

The Mechanical Destruction of Bacteria

Curran & Evans (1942) described the destruction of bacterial spores by violent agitation yvith small inert particles. Several workers (e.g. Gale, 1947) have applied this technique to the extraction of enzymes from vegetative cells. Unlike other mechanical methods (e.g. sonic disintegration or the use of bacterial mills) i t requires no elaborate equipment, and the risk of damage to proteins or ...

Mechanical destruction of pseudomonas aeruginosa biofilms by ultrasound exposure

Medical implants are prone to colonization by bacterial biofilms, which are highly resistant to antibiotics. Normally, surgery is required to replace the infected implant. One promising non-invasive treatment option is to destroy the biofilm with high-intensity focused ultrasound (HIFU) exposure. In our study, Pseudomonas aeruginosa bacterial biofilms were grown on graphite disks in a flow cham...

Ad-759 050 an Investigation of Combined Thermal Weakening and Mechanical Disintegration of Hard Rock

Combined Mechanical Destruction and Alkaline Pretreatment of Wheat Straw for Enhanced Enzymatic Saccharification

Wheat straw was pretreated by combined mechanical destruction and alkaline pretreatments to enhance enzymatic saccharification. Four strategies were employed to evaluate the potential of wheat straw as a feedstock for fermentable sugar production. The effects of the pretreatments on the substrate morphology, size distribution, chemical composition, and cellulose crystallinity, along with the su...

Discrete element modeling of explosion-induced fracture extension in jointed rock masses

The explosion process of explosives in a borehole applies a very high pressure on its surrounding rock media. This process can initiate and propagate rock fractures, and finally, may result in the rock fragmentation. Rock fragmentation is mainly caused by the propagation of inherent pre-existing fractures of the rock mass and also from the extension of the newly formed cracks within the intact ...