Ozone is a triatomic molecule consisting of three oxygen atoms. It is applied to oral tissues in the forms of ozonated water, ozonated olive oil and oxygen/ozone gas. This paper presents a brief review on the chemistry of ozone as well as its medical and dental applications focusing on its use in endodontics. Ozone's antimicrobial activity, its effect on dentin bonding, toxicity and contra-indi...

INTRODUCTION ...... . CHEMISTRy ...... . 199 200 RELATIONSHIPS BETWEEN CHEMICAL STRUCTURE AND ANTIBACTERIAL ACTIVITY.. 202 MECHANISM OF ANTIBACTERIAL ACTION. . . . . . . . 205 Activity 0/1 whole cells. . . . . . . . . .. . . . . . . . . . . 205 Activity Oil DNA-depelldellf RNA polymerase. 205 MUTATION TO RIFAMPICIN RESISTANCE. . . . . . 206 EFFECTS ON PHAGES AND PLASMlDS. . . . . . 208 STUDIES ...

We demonstrate a facile method for fabricating novel 3D microfluidic channels by using two-photon-activated chemistry to locally switch the interior surface of a porous host from a hydrophobic state to a hydrophilic state. The 3D structures can be infilled selectively with water and/or hydrophobic oil with a minimum feature size of only a few micrometers. We envision that this approach may enab...

Referring to the period prior to the establishment of the then Bureau of Chemistry in 1906 as the snake oil era may seem unkind, but it is not far from the mark. Few nostrums were effective, and fewer still had actual evidence of efficacy. Unrestricted claims of magical cures burst from the pages of newspapers and magazines, to the point that some of the most bellicose voices opposing advertisi...

The distribution and types of glandular trichomes and essential oil chemistry of Thymus quinquecostatus were studied. The glandular trichomes are distributed on the surface of stem, leaf, rachis, calyx and corolla, except petiole, pistil and stamen. Three morphologically distinct types of glandular trichomes are described. Peltate trichomes, consisting of a basal cell, a stalk cell and a 12-cel...

Aquatic toxicity considerations are part of the net environmental benefit analysis and approval decision process on the use of dispersants in the event of an offshore oil spill. Substantial information is available on the acute toxicity of physically and chemically dispersed oil to a diverse subset of aquatic species generated under controlled laboratory conditions. However, most information ha...

The Deepwater Horizon (DWH) oil spill affected more than 2000 km of shoreline. DWH oil entered the nearshore environment, stranding on shorelines as tar balls and/or emulsified oil, or forming submerged oil mats and integrating into nearshore sediments. The available chemistry data showed submerged sediments, especially within the first 50 m from oiled shorelines, displayed patchy distributions...