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.
A pulse oximeter uses two frequencies of. light (red and infrared) to determine the percentage (%) of hemoglobin in the blood that is. saturated with oxygen. The percentage is called blood oxygen saturation, or SpO. 2. A pulse. oximeter also measures and displays the pulse rate at the same time it measures the SpO.