Two groups of children, beginning in the seventh grade, rinsed their rnouths at school either once a week with a 0.2 percent solution o£neutral sodinm fluoride or once a day with a 0.05 percent neutral sodium fuoride solution. A control group of children fo]lowed the procedure once a week using a placebo mouthrinse. Results after 18 months showed that both fuoride rnouthrinse procedures effecti...

A simple, reliable and rapid method for the spectrophotometric determina­ tion of carboxyhemoglobin in fresh blood is described. A blood hemolysate is prepared by diluting a blood sample with 0.4 percent NH4 OH. Addition of sodium dithionite deoxygenates hemoglobin (and reduces methemoglobin if present) without affecting carboxyhemoglobin. Comparison of the 541/555 nm absorbance ratio for the h...

Using the criterion of early morning urinary specific gravity (SPGR) of 1.008 or less to define the presence of polyuria, we identified 26 of 72 male (36 percent) and 14 of 31 female (45 percent) institutionalized chronically psychotic patients as polyuric during a comprehensive survey of one of the chronic care units at a State mental hospital. Factors including diagnosis, sex, age, weight, an...

We develop a solid understanding of the termperature-dependent solubility of sodium p-type PbTe, the most efficient thermoelectric material. The maximum solubility of socium telluride (NaTe) in PbTe is measured to be 1.4+0.3 at percent and the heat of solution is evaluated and that addresses fundamental issues regarding the formation of nano-precipitates.

BACKGROUND/OBJECTIVES We compared changes in heart-femoral pulse wave velocity (hfPWV) in response to low sodium and high sodium diet between individuals with sodium sensitivity (SS) and resistance (SR) to evaluate the influence of sodium intake on arterial stiffness. SUBJECTS/METHODS Thirty-one hypertensive and 70 normotensive individuals were given 7 days of low sodium dietary approach to s...

Abstraet Wettabillty of southern pine veneers was judged by measuring the contact angles made by 36 phenol formaldehyde resins. Formulation of the resins was by factorial design. the molar ratios of sodium hydroxide to phenol being 0.4, 0.7, and 1.0, the levels of resin solids content in the reaction mixture 37, 40, and 43 percent, and the molar ratios of formaldehyde to phenol 1.6, 1.9, 2.2, a...

Heretofore, radiochemical yields of sugars position-labeled with carbon-14 have been only 5 to 10 percent. This paper reports an improved cyanohydrin synthesis, and the preparation of D-glucose-1-C and D-mannose-1-C from D-arabinose in yields of about 50 percent. Low yields in prior syntheses appear to have been due to several inefficient steps, and to the fact that extension of the carbon chai...

A 5-year retrospective study (1992-1996) to look at the situation of human tuberculosis was conducted in Querétaro, México. Also, a 6-month study to determine the frequency of gross lesions in dairy cattle at slaughter, and a short experiment to evaluate the effect of sodium borate in the survival of M. bovis in lesions were carried out. The number of cases were 114 in 1992, 211 in 1995, and 17...