This article discusses the influence of compressive shock waves on the permeability of cementitious materials. Shock waves are generated in water by Pulsed Arc Electrohydraulic Discharges (PAED). The practical aim is to increase the intrinsic permeability of the specimens. The maximum pressure amplitude of the shock wave is 250 MPa. It generates damage in the specimens and the evolution of dama...

The rheumatoid synovium is capable of producing large amounts of IgG which may become modified by the actions of free radicals. A rat model of synovitis was established and challenged with both normal and free radical altered IgG. IgG was prepared from homologous pooled serum by high performance liquid chromatography, and free radical damage was induced by 15 minutes ultraviolet (UV) irradiatio...

Turmeric, the dried yellow rhizome of Curcuma longa, is a common oriental spice that gives curry dishes their characteristic yellowish color and is used in Indian cooking. The active ingredient in turmeric is curcumin, which is approximately 0.5-6.0 % by weight of the root of turmeric. Since 1970, when curcumin first attracted the interest of scientific medical researchers, studies of curcumin ...

The mechanical characteristics of rock salt have an important influence on the safety of the salt cavity. The acoustic emission (AE) technique was used to analyze the generation of microcracks in rock salt under uniaxial compression condition. By monitoring acoustic emission in whole process of stress strain curve under uniaxial compression test, the damage characteristic of rock salt is obtain...

Cables play an important role in cable-stayed systems, but are vulnerable to corrosion and fatigue damage. There is a dearth of studies on the fatigue damage evolution of corroded cable. In the present study, the acoustic emission (AE) technology is adopted to monitor the fatigue damage evolution process. First, the relationship between stress and strain is determined through a tensile test for...

In vitro mammalian cytogenetic tests detect chromosomal aberrations and are used for testing the genotoxicity of compounds. This study aimed to identify a supportive genomic biomarker could minimize the risk of misjudgments and aid appropriate decision making in genotoxicity testing. Human lymphoblastoid TK6 cells were treated with each of six DNA damage-inducing genotoxins (clastogens) or two ...

Genomic instability is characteristic of cancer cells, and promotes the accumulation of genetic lesions that contribute to their neoplastic progression. There are at least two general mechanisms by which cells exhibiting genomic instability can depart from the diploid state. One involves DNA damage from high levels of translocations, gene amplification or other chromosomal anomalies. The other ...

In this issue of the Journal, McGraw et al. ([2006] Am. J. Phys. Anthropol. 000:00-00) present new data on the taphonomic signature of bone assemblages accumulated by crowned hawk eagles (Stephanoaetus coronatus), including characteristic talon damage to the inferior orbits of primates preyed upon by these birds. Reexamination of the Taung juvenile hominin specimen (the type specimen of Austral...

Tests of fluid intelligence predict success in a wide range of cognitive activities. Much uncertainty has surrounded brain lesions producing deficits in these tests, with standard group comparisons delivering no clear result. Based on findings from functional imaging, we propose that the uncertainty of lesion data may arise from the specificity and complexity of the relevant neural circuit. Flu...

The purpose oi' the study was to investigate, through laboratory tests, the potential for developing fatigue indicators for which some merit was evident from prior research. The response of photographic emulsions, phosphor coatings,and chemical indicator coatings to physical and surface-chemical reactions associated with fatigue damage in 2024-T3 aluminum was investigated. Many indicators were ...