#TITLE_ALTERNATIVE#

• Main Author: MARYAM NIM: 20715316, SRI
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/31055
• Institution: Institut Teknologi Bandung

Taro is a herbaceous plant that belongs to the family of Araceae. The common <br /> <br /> properties of taro is its bitter taste and sap which causes irritation. The burning taste <br /> <br /> is caused by a bitter sense of unknown compound, suspected as oxalic crystals in the <br /> <br /> form of rapidhe (needle), protein or other compounds. This research aims to study the <br /> <br /> responsible compounds which are able to cause itchy sensation from the Colocasia <br /> <br /> plant. This research was begun by microscopically observing the calcium oxalate <br /> <br /> crystals in the form of rafidhe from crude drug, by eliminating the itchy compounds, <br /> <br /> and by observing the electroforegram pattern of SDS PAGE. The TLC pattern of the <br /> <br /> extracts were observed by using various spraying reagents, followed by fractionation <br /> <br /> and isolation of the compounds. Based on microscopic identification showed that <br /> <br /> rapidhe of crystals oxalate was found in all three Colocasia genus. The itchy compound <br /> <br /> on the Colocasia genus can be removed by immersion using 1% sodium bicarbonate <br /> <br /> and extraction by ethanol 93%. The compound has characteristic: It is not visible under <br /> <br /> UV light at &#955;254 nm and UV light at &#955;366 nm, negative to phenol reagent but showed <br /> <br /> positive result with the reagent of ninhydrin. The compound which is suspected to cause <br /> <br /> of in taro leaves was not calcium oxalate in the form of rafidhe, but an amino acid <br /> <br /> compound <br />