Search Results for chemical

... Abstract Molar incisor hypomineralisation (MIH) is a qualitative type of enamel defect, which occurs due to a failure in the biomineralisation process of the enamel organic matrix during amelogenesis. The tooth enamel affected by MIH shows changes in its chemical, structural, and mechanical...

... its different components onto a dedicated sorbent. Moreover, each toxin can exhibit either reversible or irreversible interactions (both chemical and physical) with the sorbent, implying either synergic or competitive effects during the adsorption. Because of all these issues, it is actually very...

... Abstract The nasal allergic response is a complex process involving interactions between many chemical mediators such as histamine, bradykinin, cysteinyl leukotrienes, platelet-activating factor, prostaglandin D 2 and thromboxane A 2 . The actions of these chemical mediators are facilitated...

... subspecies of V. album . The results of the chemical constituents of V. album have been compiled in this review, which illustrates the chemical and pharmacological potential of this plant. The spatiotemporal distribution of the main active compounds, the viscotoxins and mistletoe lectins, which...

... pigments are mostly used in tattoo inks, and these pigments are supposed to be chemically inert and offer high light fastness and low migration in solvents. However, these pigments were not developed or produced for applications involving long-term stay in the dermis or contact with bodily fluids...

... Abstract The results of the detection of carcinogenic aromatic amines in about 300 ink samples are discussed. All analysed inks contained at least one or more azo compound pigments, and the presence of aromatic amines could only have originated from these compounds through a chemical process...

... Abstract Legal limits for chemical substances require that they are linked to clearly defined analytical methods. Present limits for certain chemicals in tattoo and permanent make-up inks do not mention analytical methods for the detection of metals, polycyclic aromatic hydrocarbons...

... Abstract When performing a chemical analysis of colorants in tattoo products, specific degradation products as well as impurity patterns can be predicted. Mislabeling or false declarations can also be avoided using this test. It is notable that pigment identification in tattoo products may...

... to evaluate a combination of chemical and mechanical irritation of products intended to come into repeated or prolonged contact with the skin, such as feminine protection pads. It is intended for use as a comparative toxicity test, i.e. a side-by-side comparison with a product of known safety profile...

... to environmental changes. This is a result of interactions between microbes and the environment and amongst members of the community. A multitude of chemical interactions occur in microbial communities where primary and secondary metabolites contribute to a wealth of interactions between organisms. The chemicals...

... Abstract Hypersensitivity reactions to drugs most commonly manifest in skin. Like chemical- or metal ion-induced allergic contact dermatitis and contact hypersensitivity, most acute adverse drug reactions are mediated by cytotoxic T cells and controlled by immunosuppressive regulatory T cells...