(n.) Mica containing iron and magnesia, generally of a black or dark green color; -- a common constituent of crystalline rocks. See Mica.
Example Sentences:
(1) The adhesion of cells of Salmonella typhimurium to albite, biotite, felspar, magnetite and quartz was correlated to the presence of fimbriae and degree of hydrophobicity and charge of the bacterial surface.
(2) These strains possess better ability to utilize the orthoclase and biotite.
(3) These fungi were incubated with the following iron-containing minerals: augite, hornblende, biotite, magnetite, hematite, and the igneous rock granodiorite.
(4) A high degree of adhesion to biotite, possibly due to a combination of characteristics of the particles, was not related to either bacterial fimbriation or a physico-chemical characteristic of the bacterial surface.
(5) In this survey the Rn in tight homes was on the average 3.5 times that in drafty ones, and areas with granitic bedrock led to homes having 2.3 times the Rn as for homes on chlorite-biotite-rich bedrock.
(6) Fibrous dusts (chrysotile, glass fibers, nemalite, palygorscite, and gypsum) and granular dusts (actinolite, biotite, hematite, pectolite, sanidine, and talcum) were injected intraperitoneally into rats.
(7) Among the oxides, oxyhydroxides, carbonates, and silicates, the magnesium-iron phyllosilicates (chlorite, biotite, berthierine) appear the most active.
Fluoride
Definition:
(n.) A binary compound of fluorine with another element or radical.
Example Sentences:
(1) The fluoride treated specimens released more fluoride than the nontreated ones.
(2) In the fall of 1975, 1,915 children in grades K through eight began a school-based program of supervised weekly rinsing with 0.2 percent aqueous solution of sodium fluoride in an unfluoridated community in the Finger Lakes area of upstate New York.
(3) Furthermore, the effect of immunization was examined in monkeys previously given fluoride in their diet and which had developed a low incidence of dental caries when offered a human type of diet containing about 15 per cent sucrose.
(4) If salt fluoridation could also be generalized, caries levels could be reduced to a fraction of their initial values.
(5) The effect of dietary fluoride (F) on nephrocalcinosis was studied in young, female rats.
(6) The model has been used to evaluate mineral changes from the use of fluoride dentifrices and rinses, chewing gum, and food sequencing.
(7) Thirty-six investigations were made using a number of lithium fluoride micro-rods for each investigation.
(8) It has been 40 years since the first community in the United States added a regulated amount of fluoride to its public water supply to prevent tooth decay.
(9) In spite of low fluoride content in their water supply, the findings revealed a generally low prevalence of caries experience (DMFT 1.26).
(10) Three esterase inhibitors, phenylmethylsulfonyl fluoride, bis-(p-nitrophenyl)-phosphate, and diisopropylfluorophosphate, had no effect on the antidote effectiveness of N-acetylcysteine, although each provided partial protection against acetaminophen poisoning.
(11) Duraphat-treated samples submerged in water after the exposure lost only about 50% of the deposited fluoride, whereas samples treated with 2% NaF are known to lose all their fluoride under similar circumstances, a condition which may be related to the favorable clinical effect of Duraphat.
(12) We suggest that sick districts can be affirmed on the basis of the total amount of fluoride intake, the prevalence rates of dental fluorosis, bad incomplete teeth, milk-teeth and the mean output of urinary fluoride between 8 and 15 years of age.
(13) This study shows a relatively mild level of dental fluorosis in a sample of children from a non-fluoridated area.
(14) The deacetylation step is catalysed by an acetyl hydrolase sensitive to the serine-hydrolase inhibitor PMSF (phenylmethanesulphonyl fluoride) [Touqui, Jacquemin, Dumarey & Vargaftig (1985) Biochim.
(15) The average percentages of distribution of SMFA (organic fluoride) in plasma, liver, and kidneys were 7.05, 5.07 and 1.68, respectively.
(16) There is no in vivo evidence that fluoride affects human cellular enzyme activities.
(17) The conclusions were: (1) Lesions on the occlusal tended to be deeper than those on the root surfaces at four weeks but not at two weeks; and (2) the high-fluoride gel was more protective than the low-fluoride remineralizing solution at both time periods on the occlusal but not on the root surface.
(18) The salivary clearance of sugar and fluoride is influenced by several physiological factors not yet fully investigated or understood.
(19) Prolonged coating duration from 24 hours to 1 week did not increase uptake and penetration of fluoride from both varnishes.
(20) Where no fluoride was taken zero dmf scores were 41-69 per cent.