Strokes produce many neurological issues. Foot drop is usually a neurological issue caused by damage to the nerves in the leg which can be the initial result of stroke. Weakness of the ankle and foot will cause all of the symptoms to occur. Drop foot after a stroke can be either neurological or muscular damage. The muscle is rarely damaged but can become dysfunctional due to atrophy associated with lack of use and exercise. Tingling of the lower leg and foot can also be present.
Two important chemical hazard labeling systems used in healthcare facilities are the Hazardous Materials Identification System (HMISÂ®) and the National Fire Protection Association (NFPA) NFPA 704 system.
Trichloroacetic acid (TCA) precipitation of proteins is commonly used to concentrate protein samples or remove contaminants, including salts and detergents, prior to downstream applications such as SDS-PAGE or 2D-gels.. Theory. TCA is an analog of acetic acid in which the three hydrogen atoms of the methyl carbon have been replaced with chlorine atoms. TCA is a relatively weak acid so it cannot hydrolyze the peptide bonds of proteins, but it does maintain an acidic pH in water.