Nobel Laureate Prof Muhammed Yunus on Tuesday expressed deep shock at the demise of National Professor Dr Jamilur Reza Choudhury.   "I have never thought of hearing such a sad news waking up in the morning. Prof Jamilur Reza Choudhury is my old friend. I am saddened that I have lost a very close friend," Prof Yunus said in a condolence message.    The National Professor passed away early Tuesday at a hospital in Dhaka. He was 77. President Abdul Hamid and Prime Minister Sheikh Hasina have mourned his death.