In this early work, however, the activating effects of the natural ligand, acetylcholine, were not measured and, also, atropine apparently only partially inhibited the receptor. In the current paper, therefore, we recloned this receptor (named A-type mAChR) and found that the cDNA sequence published in Shapiro et al.
At an early age we learn that the color of the water in our lakes, rivers and ponds is blue, but we expect the water in our drinking glass to be clear. When homeowners discover their home drinking water has a slight blue tint, itâs cause for concern. Blue or blue-green water likely means it contains copper.
Pool Stains & staining caused by metals. Colored water. MOST, but not all, staining on pool surfaces is preventable. The problem is most people dont realize they have metals in their water. Even trace amounts of these metals (iron, copper, manganese, cobalt, silver) can cause staining. In fact theres enough copper in ONE penny to completely stain an average sized swimming pool! Obviously, the conditions have to be right.