The Repellent Effect of Forcipomyia Taiwana and its Benefit Evaluation for Microencapsulation of Plant Extracts

• Main Authors: Sie, Ming-Chun, 謝明純
• Other Authors: Lou, Ching-Wen
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/t2s3we

碩士 === 中臺科技大學 === 醫學工程暨材料研究所 === 102 === Forcipomyia taiwana’s bites cause swelling and intense pruritus in sensitive skin, and the most effective repellent and pesticidal method is the use of synthetic chemicals, which however negatively influence the human’s health and pollute the environment. This project chiefly uses water to extract Cinnamomum osmophloeum Kaneh., Cymbopogon Spreng, Mentha, Rosmarinus officinalis, Salvia officinalis, and Eucalyptus globulus separately. The yielded extracts are then dripped on filter paper to perform the Y-tube tests so as to evaluate the repellent effects of various extracts to Forcipomyia taiwana. Next, the variations in repellent effects of different extracts’ concentrations to Forcipomyia taiwana are examined to determine the optimal plant and the parameter of water extraction. The application of extracts yielded from this project is to directly spray it over the skin, which results in short repellent effect. Therefore, chitosan/sodium alginate microcapsules are used to wrap the extracts for a controlled release speed and a prolonged repellent effect. The study demonstrated successfully that Cinnamomum osmophloeum Kaneh, Cymbopogon Spreng and Mentha against F. taiwana’s were better averse repellent effect. From the experimental results, the length of extraction time would affect the repellent effect.The repellent effect was no significant differences between 36 and 48 hours of extraction time.And all of Cinnamomum osmophloeum Kaneh, Cymbopogon Spreng and Mentha had the cell proliferation effect by the cytotoxic cellular compatibility test. Scanning by UV photometer showed the significant absorption peak at 230-280 nm, and the peak was the flavonoids.Using Fourier transform infrared spectroscopy using (FTIR) and gas chromatography mass spectrometry (GC-MS), the analysis showed that the components was cinnamic aldehyde.