1) sodium fluoride..Fluoride salts are used to enhance the strength of teeth by the formation of fluorapatite, a naturally occurring component of tooth enamel.[8][9] Although sodium fluoride is also used to fluoridate water and, indeed, is the standard by which other water-fluoridation compounds are gauged, hexafluorosilicic acid(H2SiF6) and its salt sodium hexafluorosilicate (Na2SiF6) are more commonly used additives in the U.S.[10]Toothpaste often contains sodium fluoride to prevent cavities.[11] Alternatively, sodium fluoride is used as a cleaning agent (e.g., as a "laundry sour").[7] A variety of specialty chemical applications exist in synthesis and extractive metallurgy. It reacts with electrophilic chlorides including acyl chlorides, sulfur chlorides, and phosphorus chloride.[12] Like other fluorides, sodium fluoride finds use in desilylation in organic synthesis. The fluoride is the reagent for the synthesis of fluorocarbons.[citation needed]In medical imaging, fluorine-18-labelled sodium fluoride is used in positron emission tomography (PET). Relative to conventional bone scintigraphy carried out with gamma cameras or SPECT systems, PET offers more sensitivity and spatial resolution. A disadvantage of PET is that fluorine-18 labelled sodium fluoride is less widely available than conventional technetium-99m-labelled radiopharmaceuticals.[citation needed]...
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2) Коль скоро тема была мувнута из раздела "серьезные" в раздел "несерьезные" , стало быть на продвинутый, критический взгляд и понимание серьезных модераторов (ну в силу их возможностей) тема априори не является заслуживающей детального обсуждения мэмберами РА. Для себя же, я почти все неясные вопросы выяснила. Без обид пожалуйста. Лично к Вам я хорошо отношусь. в остальном....в особенности двое предпоследних опПа нента звучали in English приблизительно таГ --->>> http://youtu.be/iSz1f1Iqj8Y





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