000 02290nam a2200241 a 4500
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008 131008t2012 my da f m 000 0 eng d
020 _aTHE0002206(Local)
039 9 _a201905131718
_byusri
_c201311181658
_dnabilah
_c201310231034
_dnabilah
_y201310081500
_znabilah
040 _aUMP
090 _aQK495.C74 H87 2012 rs Bc.
100 0 _aNurul Husna Hashim
245 1 0 _aStudy on the effect of processing parameters on the extraction of stevioside using ultrasonic extractor /
_cNurul Husna Hashim
260 _aKuantan, Pahang :
_bUMP,
_c2012
300 _axv, 41 p. :
_bill. ;
_c30 cm. +
_e1 CD-ROM
502 _aProject paper (Bachelor of Chemical Engineering (Biotechnology)) -- Universiti Malaysia Pahang – 2012
504 _aBibliography : p. 35-38
520 3 _aStevia rebaudiana is a sweet, green leaves that contain high amount of sweetener but has no calories. Inside stevia rebaudiana leaves, there are many sweet components includes stevioside, rebaudioside A, B, D, E and dulcoside. Among these sweet components, stevioside is the most abundant component. Stevioside is a natural sweetener and 300 times sweeter than sucrose. It is an alternative to sugar, that suitable for people who suffer from diabetes and hypertension because it has a negligible effect on blood glucose. In this present study, stevioside was extracted using an ultrasonic extraction method. They were 3 parameters that have been studied. The screening of the best extraction solvents (distilled water, ethanol 95% and 70% ethanol aqueous) were firstly investigated before designing the experiment by using one-factor-at-one time method. The 3 parameters involved included the ratio of leaves/solvent, extraction time and the ultrasonic frequency. Based on the result obtained, distilled water is the best extraction solvent with the ratio of leaves to solvent at 4:30 (w/v), extraction time of 20 minutes and the sonicator frequency at 20 kHz. It can be concluded that by using suitable types of solvent ratio, extraction time and sonicator frequency, the highest yield of stevioside have been obtained.
650 0 _aStevia rebaudiana
999 _aVIRTUA40
_c4234
_d4240
999 _aVTLSSORT0080*0200*0400*0900*1000*2450*2600*3000*5020*5040*5200*6500*9992