Activity for Greg‭

Type	On...	Excerpt	Status	Date
Answer	—	A: How does zinc oxide work? Zinc oxide has a very slight antimicrobial effect, whilst having little to no impact on human cells. This is more that the material is toxic to microbes than activating a body defence. It's the Zn^{2+} ions that have the property of being toxic to microbes. Small particles are more effective. Idea... (more)	—	almost 6 years ago
Answer	—	A: Is there really no way to rescue a climber from the death zone? Assuming weather conditions were perfect, and the condition you were treating was mostly oedema, then a hot air balloon with a hyperbaric chamber may be possible. However, conditions are rarely perfect, and the risk, and expense would simply be too much to keep such a toy on constant standby near ... (more)	—	almost 6 years ago