Abstract: This invention comprises new formulations of radiographic contrast media including dimeric non-ionic media, with an organic amine and a carboxylic acid. Formulations of this invention increase the biological tolerance of such media, thereby increasing their safety.

Abstract: The biological activity of naturally occurring boswellic acids in specific plant extracts is enhanced by their peracetylation, preferably followed by silica gel treatment, or by peracetylation and mild oxidation to increase the ratio of 3-&bgr;-acetyl-11-keto-&bgr;-boswellic acid to &bgr;-boswellic acid, 3-&bgr;-acetyl-&bgr;-boswellic acid and 11-keto-&bgr;-boswellic acid. The enriched compositions compared to the commercial extracts have enhanced biological activity toward a variety of proliferative and/or inflammatory afflictions in mammalian hosts and demonstrate synergism with other phytochemicals.

Abstract: Novel polymeric biologically inert compositions and their intermediates, as well as sunscreen formulations comprising them and making them invisible, are provided for broad range protection from ultraviolet radiation. Acryl polymers comprising at least two different ultraviolet absorbing moieties having different light absorbing ranges are employed in conjunction with other monomers to provide sunscreen polymers as microparticles. The polymer microparticles, once imbibed with carrier compounds, change the refractive index, thus providing invisible sunscreen formulations which offer enhanced protection without adverse physiological effects.

Abstract: Novel polymeric compositions and their intermediates are provided, providing for broad range protection from ultraviolet radiation. Acryl polymers comprising at least two different ultraviolet absorbing moieties having different light absorbing ranges are employed in conjunction with another hydrophilic monomer to provide sunscreen formulations for invisibility, and enhanced protection, without deleterious effects in the dermis.