(via Agence eureka)
“Sciences naturelles, anatomie” Images scannées par une charmante internaute espagnole Macrina .
Tea is the second most popular drink in the world, and the health benefits of this beverage have been touted since ancient times. Science has generated a body of evidence suggesting that regular consumption of green tea can help to prevent obesity and even some forms of cancer. The key molecules involved are catechins, polyphenolic compounds with tremendous antioxidant properties. Shown here is the structure of epigallocatechin gallate, which accounts for 50-80% of the catechins present in green tea. In black teas, the process of fermentation oxidizes catechins into theaflavins or theagrubins, polymerized catechins. In oolong tea, which is only partially fermented, theaseninsens are formed, dimers of catechin molecules. For a breakdown of tea chemistry, check out this review.
White Orca spotted for the first time off coastal Russia. Nick-named “Iceberg.”
“Iceberg seems to be fully socialised; we know that these fish-eating orcas stay with their mothers for life, and as far as we can see he’s right behind his mother with presumably his brothers next to him,” said Dr Hoyt.
The cause of his unusual pigmentation is not known. The captive white orca, Chima, suffered from Chediak-Higashi syndrome, a genetic condition that causes partial albinism as well as a number of medical complications.
Click for story and video via BBC.