An experimental investigation of a water heat pipe

A stainless steel water heat pipe instrumented with external surface thermocouples, internal thermocouples and pressure gages was designed, built, and operated. The operating condition of the heat pipe was controlled by manipulation of a resistance heater in the evaporator section an anannulus type water cooling jacket in the condenser section

The effect of co-trimoxazole on serum potassium concentration: safety evaluation of a randomized controlled trial

AIMS: Co-trimoxazole maintains a well-established role in the treatment of Pneumocystis jirovecii and Toxoplasma gondii, as well as urinary tract infections. Observational studies report hyperkalemia associated with co-trimoxazole which may stem from an amiloride-like potassium sparing effect. Our study reports on changes in serum potassium on patients without acute infections, and the influence of concomitant anti-kaliuretic drugs on this effect.  METHODS: Post-hoc analysis of a randomised controlled trial in patients with interstitial lung disease who were assigned to placebo or 960 mg twice daily co-trimoxazole. Serum potassium and creatinine were measured at baseline, six weeks, 6, 9 and 12 months. Primary outcome was difference in mean serum potassium concentrations between co-trimoxazole and placebo at six weeks.  RESULTS: Mean serum potassiums were similar at baseline, 4.24 (±0.44) mmol/L in the 87 co-trimoxazole group participants and 4.25 (±0.39) mmol/L in the 83 control participants. Co-trimoxazole significantly increased mean serum potassium at 6 weeks, difference between means compared to placebo of 0.21 mmol/L (95% Confidence Intervals [CI] 0.09-0.34; p = 0.001). This significant increase in serum potassium was detectable even after exclusion of patients on anti-kaliuretic drugs, difference between means for co-trimoxazole compared to placebo 0.23 mmol/L (95% CI 0.09-0.38, p = 0.002). There were 5/87 (5.7%) patients on co-trimoxazole whose serum potassium reached concentrations ≥5.5 mmol/L during the study period.  CONCLUSIONS: Co-trimoxazole significantly increases serum potassium concentration, even in participants not using anti-kaliuretic drugs. Whilst the magnitude of increase is often minor, a small proportion in our outpatient cohort developed hyperkalaemia of clinical importance

The effect of Percieved Difficulty and Locus of Control on Academic Performance

this is a pre-registration of our research, as part of the course 10712109 -Experimental Psychology, held at Tel-Aviv University