Mechanism of Action. Levocetirizine, the active enantiomer of cetirizine, is an anti histamine; its principal effects are mediated via selective inhibition of H1 receptors. The antihistaminic activity of levocetirizine has been documented in a variety of animal and human models. In vitro binding studies revealed that levocetirizine has an affinity for the human H1-receptor 2-fold higher than that of cetirizine (Ki = 3 nmol/L vs. 6 nmol/L, respectively).
A glacier calf, or chunk of ice, measuring nearly five square miles broke away from Greenland's Jakobshavn glacier sometime in August, making it the largest piece to ever break away from one of the world's fastest melting glaciers. glacier, calf, iceberg, jakobshavn, greenland.
Vatnajokull is the largest glacier in Iceland and it is behind some of the mountains that you can see from Hwy 1. Itâs hard to see, but in the picture below you can see the glacial tongues â they extend from the glacier, between the mountains and down to the valley floor. (In this case, they look like theyâre wrapping around the mountain.). Our first stop for the day was Jokulsarlon. Jokulsarlon is a large glacial lagoon that has been formed as the glacier melts and recedes from the sea. Icebergs break from the glacier, float through the lagoon and then head out to sea.