The results show that progressive failure and damage occur under impact loading of corrugated beams.
Bolts and cables should be installed before obvious separation and damage occur in the rocks to fully exert their reinforcement functions.
Hence, the above mechanisms elevate oxidative stress; thereby free radicals production occurs which arises reactive oxygen species, resulting structural changes and cell damage occur.
Yet, recognition, processing and repair of DNA damage occur within the nucleoprotein complex of chromatin which is dynamic in nature, capable of rapid unfolding, disassembling, assembling and refolding.
For organic samples, various kinds of damage occur on different timescales [25], from electronic processes on the femtosecond scale, through homogeneous reaction on the nanosecond scale, to tertiary damage (e.g., protein unfolding) on the microsecond or a longer timescale.
Its effects in humans start at concentrations lower than hydrogen cyanide's 50 ppm and are similar to those of chlorine: significant irritation of the eyes and respiratory system as well as liver and kidney damage occur above 25 ppm.
