| 000 | 03457ntm a2200277 a 4500 | ||
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| 001 | vtls000091314 | ||
| 003 | KUKTEM | ||
| 005 | 20251117113259.0 | ||
| 008 | 150923t2015 my a f m 000 0 eng d | ||
| 020 | _aTHE0003970(Local) | ||
| 039 | 9 |
_a201905150916 _bfauzi _c201712041047 _dfateeha _c201509231105 _dhuda _y201509231104 _zhuda |
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| 040 | _aUMP | ||
| 090 | _aTP156.E8 A84 2015 r Bc. | ||
| 100 | 0 | _aAshwinder Chelliah | |
| 245 | 1 | 0 |
_aSeparation of essential oil from mixtures of melissa officinalis and cymbopogan citratus leaves for mosquito repellent / _cAshwinder Chelliah |
| 260 |
_aKuantan, Pahang : _bUMP, _c2015 |
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| 300 |
_axv, 44 p. : _bill. (some col.) ; _c30 cm. + _e1 CD ROM |
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| 500 | _aFaculty of Chemical & Natural Resources Engineering | ||
| 502 | _aProject paper (Bachelor of Chemical Engineering) -- Universiti Malaysia Pahang – 2015 | ||
| 504 | _aBibliography : p.32-37 | ||
| 520 | 3 | _aSynthetic based chemicals such as DEET is one of the most commercialised synthetic based mosquito repellents. This compound is effective against a wide range of insects and arthropods but its usage has raised several concerns to human health and surrounding environment.To combat its negative effects, there has been an overwhelming interest of producing essential oil products from different species of natural plant materials in order to access their repellent properties.Essential oils are odourless volatile mixture of hydrocarbons and their repellent properties have been linked to the presence of monoterpenes and sesquiterpenes.Therefore, it is important to identify a best technique to extract the essential oil without causing significant effect on their chemical constituents, since the conventional methods implied years back are time consuming and also record a low extraction yield.In order to enhance the extraction yield, an improvised approach namely Ultrasound Assisted Extraction-Hydrodistillation method will be exhibited to separate essential oil from mixtures of Mellissa officinalis and Cymbopogan citratus leaves. At the same time to evaluate the effectiveness of repelling properties in the essential oil, mixtures of leaves have been chosen in this extraction process.In this study, the effects of three main factors which are ultrasonic pre-treatment time, raw material to water ratio, and ultrasonic frequency were investigated.As a result, the best condition gives the highest yields of oil (0.3820%) were found at the ultrasonic frequency of 5kHz, pre-treatment time of 60 min and solid to water ratio of 1:6. The mixture ofMelissa officinalis and Cymbopogan citratus leaves reflects higher essential oil yield compared with the yield of Mellissa officinalisleaves. Finally the oil samples were analysed by using Gas Chromatography Mass Spectrometry (GC-MS). From the analysis, almost similar chemical compounds with potentiating repellent activity such as linalool, citronellal, geraniol, citral, α-pinene, and limonene were found in their respective essential oils. Anyhow, the amount it contains differs from one another. Moreover, the repellency test carried out using the extracted oil against mosquito have also showed positive outcome. | |
| 650 | 0 | _aExtraction (Chemistry) | |
| 650 | 0 | _aEssences and essential oils | |
| 856 | 4 | 0 |
_uhttp://ecollib.ump.edu.my/id/eprint/9497 _zAccess in library only |
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_aVIRTUA40 _c6020 _d6026 |
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