Antihistamines, H1. Histamine antagonists or antihistamines are drugs that relieve allergy symptoms.Histamine is a chemical used to identify and remove substances that trigger an allergic response. Ã¢ There are four histamine receptors &#40;designated H<sub>1</sub>, H<sub>2</sub>, H<sub>3</sub>, H<sub>4</sub>&#41;.
Water leaks in central air conditioners are almost always caused by a problem with the condensate pan or drain pipes. The most common of those problems is a clogged drain line. When your condensate drain line gets clogged, water backs up and builds up in your pan. With nowhere to go, that water will begin to leak over your drain pan and onto your system and your floor. Another problem that can lead to a water leak is a crack somewhere in the pan or in the drain pipes.
What happens when you put air in a tire filled with Nitrogen. I HATE BIG-O TIRES!!!!! My wife just had tires put on her Freestyle. I lookd at the bill when she brought it home and noticed they filled the tires with Nitrogen and charged her $30 to do it.e: What happens when you put air in a tire filled with Nitrogen. Originally Posted by kwspony one thin I know is that nitrogen particles are larger then air so the tire will leak less from just sitting.