Lead is one of the persistent agents found extensively in the environment and has destructive impacts on the tissues. Regarding the high spread of lead, particularly in Iran, we investigated the effects of lead acetate II on the expression level of osteocalcin gene and histological changes of bone. 40 chickens were randomly divided into four groups. As well as the libitum, the control group was...

When distilled water from a tin-lined still served as the plating diluent, cells of Aerobacter aerogenes developed symptoms of metabolic injury as evidenced by increased counts on supplemented, as compared with minimal, plating medium. Cysteine was as effective as yeast extract as a supplement to the minimal medium in increasing the viable count. Mg(++) and, to a lesser extent, phosphate buffer...

CONTEXT Calcium hydroxide (Ca(OH)2) paste filling is largely used as intra-canal medication and can be combined with different vehicles. Removal of that paste should be preceded by obturation, to avoid the occurrence of apical microleakage. AIMS To evaluate the efficiency of removal of pulp Ca(OH)2, from using different vehicles (water, propylene glycol) and removal techniques (mechanical and...

The influence of dipping in hot salt solution on water absorption in nylon6 composites with dispersed aluminum powders was investigated. Dipping in hot salt solution (3mass%NaCl in distilled water) for 10 s at 373K increased the overweight of composite samples, whereas the addition of aluminum with dispersed powders (A1-addition) from zero to 40 vol%Al decreased the overweigh of the sample. Bas...

on intravenous quinine injections. As this place is a hotbed of malaria, I deal with several hundred malaria cases each year, and for the past few months I have been in the habit of giving quinine intravenously, having abandoned the intramuscular route as, in some cases, it resulted in abscesses. Since reading Dr. Vasavada's letter I have given more than a hundred intravenous quinine injections...

^Th'rtechnique of Ch'in and Wongm^f drop lowed in all its detail. A very Of blood (0.02 c.cm.) is obtaine mjxed patient's finger or lobe of the ear i10n0w with a drop of 5 per cent .sa^ne,in ru>\n and ?f the special slide devised b> pmulsion Wong. Then a drop of the antige tate(j (0.008 c.cm.) is added and the sh ^en by the hand 200 times. The mix blood diluted with distilled water to lys ctive...

The Solution.?The required dose should be dissolved in sterile distilled water in order to make a 5 per cent, solution, i.e., 0.05 gramme will require 1 c.c., 0.1 gramme 2 c.c., 0.2 gramme 4 c.c., and 0.3 gramme 6 c.c. The solution should not be boiled and should be prepared freshly. (We have used solutions that have been kept 48 and even 72 hours without any ill-effects but as there is danger ...

In Nitella the action curve has two peaks, apparently because both protoplasmic surfaces (inner and outer) are sensitive to K(+). Leaching in distilled water makes the outer surface insensitive to K(+). We may therefore expect the action curve to have only one peak. This expectation is realized. The action curve thus obtained resembles that of Chara which has an outer protoplasmic surface that ...

Not only does distilled water take away the irritability of Nitella but it also changes its behavior toward potassium. In normal cells potassium is strongly negative to sodium but after sufficient exposure to distilled water this effect disappears. It can be restored by returning the cells to their normal environment or to a suitable nutrient solution. This change in the protoplasm seems to be ...

Experimental Section Materials. N-Isopropylacrylamide (NIPAM, 97%, Tokyo Kasei Kagyo Co.) was purified by recrystallization from a mixture of benzene and n-hexane (1/3, v/v). Styrene (St, 99.5%, Beijing Chemical Factory) was successively washed with aqueous NaOH (5.0 wt %) and water, then distilled over CaH 2 at reduced pressure. 4-Chloro-7-nitrobenzofurazan (NBD-Cl, 99%), 2,3,3-trimethylindole...