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31. Fluoride is a naturally occurring mineral that helps to safely strengthen tooth enamel and prevents cavities.

32. Membrane utilized for endotoxin removal namely chitosan affinity membrane was prepared by using Poly(vinylidene fluoride) (PVDF) hollow fiber membrane as support.

33. Results showed that Perfluorinated Sulfonyl Fluoride Resin prepare in this paper was of practical usage with properties fit for application.

34. This paper reports the function of anhydrous potassium fluoride and acetonitrile in C-alkylation of active methylene group of acetoacetic ester.

35. Conclusion The fluoride contents of the samples and daily total fluoride intake are condign to related health standards in Wuhan residents.

36. Objective To explore the changing regularity of skeletal fluorosis with osteosclerosis drunk low fluoride water for long time.

37. The polyvinylidene fluoride (PVDF) flat microporous membrane was prepared via thermally induced phase separation (TIPS) method using dimethyl phthalate (DMP) as the diluent.

38. Objective To investigate the preventive effectiveness in reducing tooth decay and decalcification of different concentration of fluoride toothpaste for orthodontic patients.

39. The conditions and mechanism of removing fluoride ions from water by activated meerschaum have been investigated in this paper.

40. Some antihistamines, antipsychotic drugs, and antihypertensive medications cause tooth stains, as can iron and excess fluoride.

41. In this thesis, polyvinylidene fluoride (PVDF) hollow fibers membrane are fabricated by using dry-wet phase inversion method.

42. The fluoride in standard reterence material of broccoli, spinach, rice, dry fish meat and the corn of was determined by this method on precision and accuracy.

43. Objective To investigate clinical appearances, mechanism and prognosis of the cerebropathy of acute organic fluoride poisoning.

44. The system, made by Linde, splits hydrogen fluoride into fluorine.

45. Some single-layer films of 9 infrared thin film materials, which include fluoride, sulfide and selenide, have been made by resistive heating evaporation or electron beam bombardment technique.

46. Objective To evaluate the concentration of fluoride in the air of Nanzhuang, Xiaotang in Nanhai City and offer references for the water fluoridation schemes in the very areas.

47. Conclusions The F - releasing may affect physical and mechanical properties of fluoride - containing composites.

48. The results showed that the combined toxicities were antagonism in both fluoride and selenite and fluoride and selenate tests.

49. Fluoride in Drinking-water is one out of a series of WHO monographs, which address the management of other chemicals in drinking-water(sentencedict.com), such as arsenic or cyanotoxins.

50. Traditional phosphating solutions usually contain sodium nitrite, potassium bichromate, sodium fluoride and nickel nitrate which are detrimental to human body and environment.

51. Usually fluorinated copolymer unit, said the number of fluorine atoms, such as fluorine rubber, 23, is a vinylidene fluoride copolymers with chlorotrifluoroethylene.

52. Calcium is necessary for healthy teeth. Fluoride in toothpaste helps us to prevent tooth decay.

53. Ion selective electrode analysis of fluoride in deluted chromating solution is described.

54. Novel hydrophobic polyvinylidene fluoride(PVDF) hollow fiber membranes were adopted in air blowing membrane absorption(ABMA) process for the purpose of bromine extraction from seawater.

55. Polyvinylidene fluoride(PVDF) membrane was made by N, N-dimethylformamide(DMF) as the solvent and fluoride resin as the hydrophobic agent.

56. Experiment using HF - fumigation was conducted to study effect of hydrogen fluoride on rubber tree saplings.

57. Conclusion Fluoride mouth rinse can effectively prevent and treat enamel decalcification in fixed-orthodontic treatment.

58. Metallic calcium also burns in fluorine gas, forming the fused fluoride,[sentence dictionary] and occasionally minute crystals of fluorspar .

59. Aim To validate spectrum analysis of oxalyl fluoride neutral molecule(FCO)2 and study vibrational mode of the two configuration.

60. The colorimetric methods involve the bleaching of a preformed color by the fluoride ion.