Piperine is extracted from black pepper using dichloromethane. Aqueous hydrotropes can be used in the extraction to result in high yield and selectivity. The amount of piperine varies from 1â2% in long pepper, to 5â10% in commercial white and black peppers.
The United States Secretary of Defense is the head of the Department of Defense. The current Secretary of Defense is Chuck Hagel, who was nominated by President Barack H. Obama and approved by the US Senate on February 27, 2013.
This morning, President Obama announced his nomination of former Deputy Secretary of Defense Ashton Carter to be the next U.S. Secretary of Defense.Carter has been in public service for more than 30 years, and has served in various positions under 11 Secretaries of Defense.atch on YouTube. This morning, President Obama announced his nomination of former Deputy Secretary of Defense Ashton Carter to be the next U.S. Secretary of Defense. Carter has been in public service for more than 30 years, and has served in various positions under 11 Secretaries of Defense.