This paper presents the results of geological engineering research conducted to determine character rock masses, recommendations tunnel excavation method and support system based on standup time estimates in unsuported conditions. The investigation was by observing mass quality newest bore log sample test 2019 using Rock Mass Rating (RMR) Geological Strength Index (GSI) classification. showed t...

The nonlinear mechanical behavior of intact rock and mass is characterized by irreversible deformation, associated with strain hardening, softening degradation stiffness. In the case stratified types like shales or phyllites, additionally depends on loading direction respect to orientation principal material directions, resulting in inherent anisotropic behavior, many cases more specifically tr...

Infrared thermography is a growing technology in the engineering geological field both for remote survey of rock masses and as laboratory tool non-destructive characterization intact rock. In this latter case, its utility can be found either from qualitative point view, highlighting thermal contrasts on surface, or quantitative involving study surface temperature variations. Since an object pro...

It is well known that joints or fissures have an important effect on the failure mechanism of natural rocks. Previously, many numerical and experimental papers been carried out to study strength anisotropy characteristics jointed However, few studies nonpersistent rock masses with different persistence, especially for in three dimensions. In present study, a 3D mass inclinations (θ) persistence...

Stage-X blastoderms, within intact eggs from White Leghorn hens, were exposed to 500-700 rads of gamma radiation from a 60Co source prior to injection, into the subgerminal cavity, of approximately 100 or 200-400 dispersed cells from stage-X blastoderms isolated from eggs laid by Barred Plymouth Rock hens. Embryos developing past day 14 of incubation and hatched chicks were assessed for donor a...

Magnetite is both a common inorganic rock-forming mineral and a biogenic product formed by a diversity of organisms. Magnetotactic bacteria produce intracellular magnetites of high purity and crystallinity (magnetosomes) arranged in linear chains of crystals. Magnetosomes and their fossils (magnetofossils) have been identified using transmission electron microscopy (TEM) in sediments dating bac...

Dorsal rhizotomy results in primary deafferentation of the dorsal horn with concomitant sprouting of spared intraspinal monoaminergic axons. Because descending monoaminergic systems are thought to mitigate nociceptive transmission from the periphery and because dorsal rhizotomy can result in neuropathic pain, we sought to determine whether the rhizotomy-induced sprouting response could be furth...