منابع مشابه
Bleaching و عوارض آن
Normal 0 false false false EN-US X-NONE AR-SA One of the concerns od patients have been teeth stains particularly in anterior region. The etiology of this can be pulp necrosis, developmental disorders, drugs and systemic diseases. Bleaching or tooth whitening is a solution for some of these color changes. This article evaluated different methods of...
متن کاملRagauskas Overview of Hexenurinic Acids on Pulp Bleaching Influence of Hexenuronic Acids on Kraft Bleaching
Over the past ten years there has been a research renaissance in hemicellulose chemistry as it applies to pulping and bleaching operations. Researchers have identified hemicelluloses as an important component influencing pulp yields, strength properties, and pulp bleachability. This report summarizes the research activities undertaken at IPST in the dues funded research consortium (DFRC) projec...
متن کاملMissing salts on early Mars
[1] Our understanding of the role of water on Mars has been profoundly influenced over the past several years by the detection of widespread aqueous alteration minerals. Clay minerals are found throughout ancient Noachian terrains and sulfate salts are abundant in younger Hesperian terrains, but these phases are rarely found together in the early Martian rock record. Full alteration assemblages...
متن کاملCoral Bleaching: Photosynthetic Impacts on Symbiotic Dinoflagellates
xxxviiiABSTRACT Global climate change is leading to the rise of ocean temperatures and is triggering masscoral bleaching events on reefs around the world. This involves the expulsion of thesymbiotic dinoflagellate algae, known as zooxanthellae, from the coral host. Coralbleaching is believed to occur as a result of damage to the photosynthetic apparatus ofthese symbionts...
متن کاملOn optical bleaching of barium fluoride crystals
Barium fluoride (Baf2) crystals were considered by the GEM Collaboration, to be used in constructing a precision electromagnetic calorimeter at the SSC [1] . The key issue of using this crystal at the SSC is its radiation resistance [2] . An Expert Panel was assigned by the SSC laboratory to review the radiation damage problem of BaFz. The Panel met in December 1991 and again in January 1992 fo...
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ژورنال
عنوان ژورنال: Journal of the Franklin Institute
سال: 1844
ISSN: 0016-0032
DOI: 10.1016/s0016-0032(44)90658-7