Coherent control in the presence of disorder

Safety Aspects of the Use of Quercetin as a Dietary Supplement

“…[27][28][29] Thus, quercetin can be glucuronidated, sulfated, or/and methylated. [30,31] In addition, it is suggested that quercetin is also oxidized in vivo, forming quercetin-quinone and quercetin-quinone methides [32,33] which is further discussed in section 4.3.2.1 Genotoxicity and carcinogenicity. Non-absorbed quercetin can be degraded by the colonic microbiota to different phenolic acids (e.g., 3,4-dihydroxyphenylacetic acid) and carbon dioxide.…”

“…Primarily in vitro but also some in vivo studies have shown that, although quercetin displayed antioxidative effects in several kinds of cells and tissues, quercetin itself was converted to the reactive oxidation products, o-semiquinone and o-quinone, which may react with thiols and cause loss of protein function and cytotoxic effects. [32,33,[50][51][52][53][54] The occurrence of possible anti-or prooxidative effects of quercetin may be dependent on the quercetin dose, time of exposure, and the cellular redox state. The intake of antioxidative compounds such as vitamin C may theoretically mask the suggested pro-oxidative effects of quercetin.…”

“…[30,46,103,104] The oxidation of quercetin to the reactive metabolites o-quinone and quinone methide can result in the formation of DNA adducts which has been suggested as a possible genotoxic mechanism. [32,33] By contrast, the in vitro genotoxic effects of orally applied quercetin could not be confirmed in in vivo studies with mice or rats. Quercetin caused no induction of DNA strand breaks, DNA damage, micronuclei formation or chromosomal aberrations in bone marrow cells.…”

Epitaxial growth of two-dimensional electron gas (2DEG) in strained silicon for research on ultra-low energy electronic processes

“…These mass numbers are consistent with the presence of H 2 , C, O, H 2 O, CO and CO 2 , none of them are known to be electrically active defects in silicon with appreciable capture cross-section. There are, however, convincing evidence that H atom exists in either "+" or "−" state in Si matrix with H 0 state being energetically unstable [18]. Higher substrate temperature during growths is associated with higher pressure with the main contribution that comes from the increase of H 2 partial pressure.…”

Biosynthesis of Food Flavours and Fragrances - A Review

“…These reactions use very mild operating techniques, have high specificity with reducing the side reactions and produces good purity of flavoured compounds by avoiding the more expensive separation techniques [10].…”