02222nam a2200241 a 4500 vtls000068065 KUKTEM 20251114204523.0 130109t2012 my a f m 000 0 eng d THE0003974(Local) 201905150918 fauzi 201301091626 Fida UMP TP156.E8 A85 2012 rs Bc. Noor Asikin Ahmad Safri Study on extraction kinetics and formulation of natural mosquito repellent solution from marigold flower extracts / Noor Asikin Ahmad Safri Kuantan, Pahang : UMP, 2012 xiii, 54 p. : ill. (some col.) ; 30 cm. + 1 CD-ROM Project paper (Bachelor of Chemical Engineering) -- Universiti Malaysia Pahang - 2012 Bibliography : p.32-35 The uses of plant extract which is Marigold flower can reduce the uses of chemical in mosquito repellent. Thus a research will be conduct to study on extraction kinetics and formulation of natural mosquito repellent solution using ultrasonic extraction from Marigold flower. During the extraction process, the reaction kinetics is study. Lutein has been extracted from Marigold using ultrasonic extraction at various extraction conditions such as different temperature, extraction time and volume of solvent due to its pharmacological actions. Lutein content in the extract is also determined by high performance liquid chromatography (HPLC) method. Based on experimental results, the content of lutein extracted from Marigold flower was found to be 2.5354% and the maximum amount of lutein extracted was obtained at temperature 45oC, volume of solvent at 150 ml and extraction time at 30 mins. The optimization results demonstrated that temperature was the influential variable on the extraction content of lutein. The extraction rate constant, k of lutein decreased with increasing temperature and volume of solvent, and the k values were (0.0405-0.2712) min-1. The lutein with higher concentration is used as main ingredient in mosquito repellent which gives the positive effect. Extraction (Chemistry) 0 0 0 1 10000 10000 2019-09-04 0 TP156.E8 A85 2012 rs Bc. 0000068485 2019-09-04 00:00:00 1 2019-09-04 PSM 0 0 0 1 10000 10000 2019-09-04 0 CD 6459 | TP156.E8 A85 2012 rs Bc. 0000068486 2019-09-04 00:00:00 1 2019-09-04 PSM VIRTUA40 3451 3457 VTLSSORT0080*0200*0400*0900*1000*2450*2600*3000*5020*5040*5200*6500*9992