Relationship between quantity of neem extracts and seed drying temperature
1996
Unchalee Sanguanpong | Charun Likitrattanaporn | Phanida Busaparoek
Study on different drying temperatures of neem seed at 60 deg C, 75 deg C and 90 deg C compared with conventional methods such as sunlight and sunlight plus drying at 60 deg C/18 hours was founded that different drying temperatures had influenced on quantity of neem oil from extraction. Drying at 75 deg C and 95 deg C showed significantly better yield than both of conventional methods. The quantity of neem oil were 8.00, 10.00, 4.66 and 5.33 g respectively. Only 6.33 g was received by drying at 60 deg C. On the other hand the different drying temperature had not influenced on quantity of polar compounds in the methanol extract which contains the active ingredient azadirachtin. To Study on the physical property such as the difference of color by using calorimeter after Judd-Hunter L-a-b-solid method, the lightness (L-value) and b-value were not influenced by drying temperature, whereas it had significantly effected on the a-value. Compare with conventional methods in which the neem seeds were green color, the seed were nearly red by high temperature. By drying at 90 deg C the color were significantly difference from sunlight and sunlight plus drying at 60 deg C/18 hrs.
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