In this article, we report anticancer activity of 14 anthracenedione derivatives separated from the secondary metabolites of the mangrove endophytic fungi Halorosellinia sp. (No. 1403) and Guignardia sp. (No. 4382). Some of them inhibited potently the growth of KB and KBv200 cells, among which compound 6 displayed strong cytotoxicity with IC(50) values of 3.17 and 3.21 microM to KB and KBv200 c...

BACKGROUND The impact of bleaching on the cemento-enamel junction (CEJ) is not well known. Due to frequent sensitivity of the cervical region of teeth after the vital bleaching, the aim of the present study was to evaluate the morphological features of the CEJ of human teeth after application of fluoridated and fluoride-free bleaching agents, as well as post-bleaching fluoridation treatment, by...

background: in order to compensate the adverse consequences of bleaching agents, the use of fl uoride-containing remineralizing agents has been suggested by many researchers. the aim of this study was to compare the effect of applying two remineralizing materials on bleached enamel hardness and in comparison to natural saliva. materials and methods: in this experimental study, 30 enamel samples...

Very recently, ToMITA and coworkers' 2) have reported the fermentation, isolation and structure elucidation of gilvocarcins V (1) and M (2). They note that I was previously described under the name of toromycin by HORII et al.3) although the structure of toromycin was not elucidated. Recently we have isolated 1 and 2 and a related compound gilvocarcin E (3) from a culture of Streptomyces anandi...

The ROUS, or Rodent of Unusual Size[4], is an autonomous quadruped built on a cruciform body plan with three degrees of freedom per leg. This flexibility allows the agent to explore a variety of gaits, including the standard forward and reverse as well as a crab-like sidle to the left and right. Further gait variation could be achieved with experimentation.

Objective: To evaluate the in vitro effect of antioxidants on bond strength between composite resin and enamel subjected to bleaching agents. Methods: Nineteen sound human molars had their roots sectioned, while surfaces were flattened filled with produce specimens, which then divided into seven groups: G1 – unbleached without antioxidant (control); G2 36% carbamide peroxide; G3 peroxide 10% as...

OBJECTIVES There is some evidence that the pH at the root surface is reduced by intracoronal placement of bleaching pastes, which is known to enhance osteoclastic activity. Therefore, it is recommended that a protective barrier be used over the canal filling to prevent leakage of bleaching agents. Glass-ionomer (GI) is commonly used as a coronal barrier before nonvital bleaching. Because minera...

Tooth bleaching has become a popular cosmetic treatment among patients that want to enhance their esthetic appearance. In addition, light-activated bleaching gels have been growing among dental professionals mainly due to the fastening of the whitening procedure and/or therapeutic purposes. Thus, the objective of this case report was to present the bleaching protocol and efficacy of a light-act...

# Department of Conservative Dentistry and Endodontics, Institute of Dental Studies and Technologies, Modinagar, Ghaziabad. ABSTRACT Tooth-bleaching techniques today mostly employ hydrogen peroxide as the active agent. It is applied directly, or produced in a chemical reaction from sodium perborate or carbamide peroxide. More than 90% of success rate has been reported for intracoronal bleaching...