14th-century painting of the assassination of Nizam al-Mulk by an assassin. The Assassins (from Persian: Ø­Ø´ÛØ´ÛØ§Ù ââ Arabic: Ø­Ø´ÙØ§Ø´ÙÙ â á¸¤ashshÄshÄ«n) is the name used to refer to the medieval Nizari Ismailis, particularly those of Persia and Syria.t is said that the Assassins are the ancestors of those given the surname Hajaly, derived from the word hajal, a rare species of bird found in the mountains of Syria near Masyaf. The hajal (bird) was often used as a symbol of the Assassin's order.
1 Use the colorimeter to measure the absorbance of the water sample and the standard solutions across a range of wavelengths. Choose a suitable wavelength for the rest of the experiments.  As a group, decide on how you will need to dilute the standard solutions.
What is a pulse oximeter? Pulse oximeters are medical devices used to measure the oxygen level (or oxygen saturation) in the blood. Pulse oximeters are considered to be a noninvasive, painless, general indicator of oxygen delivery to the tissues (e.g., finger, earlobe, forehead, toe or nose).