I am a believer that people should try to learn at least a single current thing each day, however this week, I l gained the difference between a semipermeable membrane, a single that allows particles to pass through it based on size, and a selectively permeable membrane that somehow decides or “chooses” what will pass through it.
The best example of the latter is human skin, the body’s largest organ and the protective layer that covers us from head to toe.
This amazing substance has an enemy that can’t be avoided, and that is Heating plus A/C; Air conditioning has been a miracle since its 1902 invention; It first revolutionized workplaces needing humidity control and made living in places like FL bearable. The problem is that its effect on our skin can be devastating… Skin needs moisture to stay healthy and the lower humidity in a room heated or cooled with dry air will make the skin shriveled and itchy. Skin can also lose its elasticity and ability to regenerate. That is a single reason why skincare products that ward off the damaging effects of Heating plus A/C are a multi-billion-dollar industry… Before we pile too much blame on Heating plus A/C for our wrinkles and other skin ailments, consider that Mother Nature has been damaging people’s skin since the dawn of civilization. The effects of the sun are well documented, and dozens of sun-blocking lotions are available to prevent disfigure from harmful UV rays, but people in freezing temperatures often suffer from the dry itchy Wintertide air that sucks the moisture from the skin. The enjoyable news is that humidifiers can keep a room’s humidity at reasonable levels to prevent skin disfigure. Applying moisturizing skin lotions is a small price to pay to love the benefits of Heating plus A/C that include our year-round comfort and getting a enjoyable night’s sleep.