Biomedical subjects
Publications and source records attributed to A Markus.
Triphenyltin hydroxide was encapsulated to prolong its fungicidal activity and to decrease its phytotoxicity in peanut fields. The envelopes found to be adequate for this purpose were polyureas and ethyl cellulose, as was demonstrated by biological tests.
Vitamin A was protected from degradation in the first compartment of the ruminant stomach by encapsulation by a phase-separation technique. The matrix components consisted of substituted cellulosic materials, fatty acids or a variety of proteins. Antioxidants such as butylated hydroxytoluene and ethoxyquin were incorporated in the formulations. The protective efficiency of the formulations as estimated by exposing the encapsulated vitamin A to gastric juice (microbial degradation) and to a pepsin solution (enzymatic degradation). The capsules prepared with substituted cellulosic materials gave the best protection to vitamin A from degradation.