Recommended videos are generated based on your watch history which stores all the videos that you have watched before. This is enabled by default. If we disable it and erase the existing history, YouTube would not show any recommendations. Hereâs how to do it: 1  Go to YouTube homepage and click on History on left sidebar.
Ambergris has been used since ancient times in perfumes, medicines and food. It is still used as a scent and fixative in perfumes, and even in drinks and delicacies. It is described as having a musky, animalistic, sweet smell.
Replacement compounds and economics Historically, the primary commercial use of ambergris has been in fragrance chemistry, although it has also been used for medicinal and flavoring purposes. Ambergris has historically been an important perfume odorant and is highly sought.mbergris is relatively nonreactive to acid. White crystals of a substance called ambrein, can be separated from ambergris by heating raw ambergris in alcohol then allowing the resulting solution to cool.