In the crown-ether complex, the metal ion fits into the cavity of the crown ether and is solvated by the oxygen atoms. The exterior of the complex is nonpolar, masked by the alkyl groups of the crown ether.
Arrow Alerts. Location-enabled apps and services track your iPhone by periodically querying it for location-based information. They may do this while being used or running in the background on your device. A little arrow appears on the iPhone's upper-right corner to advise you when data is shared. Arrows also appear within the Location Services settings screens to indicate when and what kinds of information was shared with whom.
1 40% - What does the middle icon box with the arrow means in the iphone email and how can retrieve the email if i can? 2  44% - What does the box with the arrow pointing down towards it in a gmail account email mean?.he symbol of a box with an arrow.... 45. 2. When viewing an email on the iPhone, the symbol of a box with an arrow pointing to it at the bottom of the screen is the Archive button.