In order to estimate interfering effects of mercury and lead on biochemical oxygen demand (BOD), BOD in 18 effluent samples were measured under three different concentrations of mercury and lead. The results obtained were as follows: 1. Biochemical oxygen demand(BOD) was decreased under the presence of mercury and lead, with parallel correlation of mercury concentration. 2. High correlations were noted between original BOD concentration and decreasing amount of BOD when concentrations of mercury or lead were increased. 3. When the lead concentration was high, the close correlation was observed between total organic carbon(TOC) and decreasing amount of BOD. 4. There was a negative correlation between TOC/BOD ratio and decreasing amount of BOD when the mercury concentrations were high.
Oxygen*

Oxygen*

No abstract available.
Oxygen*

No abstract available.
Oxygen

No abstract available.
Oxygen* ; Poisoning*

Hemodilution* ; Oxygen*

To evaluate the sensitivity of the arterial/alveolar oxygen tension ratio as an index of rapid and simple method for predicting the new arterial oxygen tension at any fractional concentraion of inspired oxygen, smalle reviewed the arterial blood gab data obtained before and after an inspired oxygen concentration change from 16 mechanically ventilatedPatients. The results were as followa ; 1) There was no statistically difference between the predicted arterial oxygen tension 75+/-6 torr (mean+/-S. D.) and the obtained(actual) arterial oxygen tension 94+/- torr(mean+/-5.D) in the patient group wit? arteria1/alve7lar oxygen tension ratio change below 0.02 after the inspired oxygen concentration change (P>0.01) , 2) There was statistically signifioant difference between the predicte? arterial oxygen tension 105+/-7 torr(mean+/-S.D.) and the obtained(actual) arterial oxygen tension 91+/-6 terr (mean+/-S.D.) in the patient group with an arterial/alveolar oxygen tension ratio changeabove 0.06 after the inspired oxygen concentration change (P<0.05) . The analysis presented that the new arterial oxygen tension was acculately predicted by the equation if the arterial/alveolar oxygen tension ratio changed<0.02 after the inspired oxygen tension change and that poorly predicted if the arterial/alveelar oxygen tension ratio change> or =0.06 after the inspired oxygen tension change.
Humans ; Oxygen*

No abstract available.
Oxygen* ; Oxygenators*

No abstract available.
Oxygen* ; Transplants*

Oxygen consumption of the rabbit cornea was determined by Warburg direct method in exposed and compared with covered. Six, twelve, twenty-four, forty-eight and seventy-two hours after death, respectively, 8 corneas (4 corneas were exposed and other 4 corneas were covered) from each series were used for QO2 measurment and compared with fresh corneas. The results were as follows; 1) Oxygen consumption of fresh corneas were found to be about 0.79 micro IO2/mg (dry wt.)/hr and there was no significant difference between both eyes. 2) Until twelve hours after death, oxygen consumption in covered group was greater than in exposed group. 3) Twenty-four hours after death, exposed group consumed more oxygen than covered group and QO2 volume tended to increase in the course of time, probably by bacterial growth, but statistically not significant. 4) As the results described above, it was presumed that the cornea should be preserved for keratoplasty at least within twelve hours after death of the host and covered group would be better than exposed group.
Cornea* ; Corneal Transplantation ; Oxygen Consumption* ; Oxygen*