 ผลงานตีพิมพ์ในวารสารวิชาการExcito-repellency properties of essential oils from Melaleuca leucadendron L., Litsea cubeba (Lour.) Persoon, and Litsea salicifolia (Nees) on Aedes aegypti (L.) mosquitoesผู้แต่ง: Noosidum, A,  Ms.Atchariya Prabaripai, Associate Professor , Dr.Theeraphap Chareonviriyaphap, Professor , Dr.Angsumarn Chandrapatya, Professor , วารสาร:  
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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Microencapsulation of Litsea cubeba Essential Oil in ?-Cyclodextrin Using Paste and Co-Precipitation Methods) ผู้เขียน:Pooyan Shakouri Elizei, Wunwisa Krasaaekoopt สื่อสิ่งพิมพ์:pdf AbstractMicroencapsulation of Litsea cubeba essential oil (LCEO) with ?-cyclodextrin (BCD) was carried out using the paste and co-precipitation methods at various oil concentrations and ratios of LCEO to BCD adapted from a central composite design to determine the effect of these factors on the microencapsulation efficiency, microencapsulation yield, surface oil and recovery of the finished product. In addition, the effect of different levels of water activity and temperature on the oxidative stability of the powder was investigated. Treatment 4 using the paste method with 90% LCEO and a ratio of LCEO to BCD of 15:85 was found to be more efficient compared to samples produced by the co-precipitation method. This condition provided an oil loading of 102 mg.g-1 of powder, 74.7% microencapsulation yield, 71.9% microencapsulation efficiency, 94.8% recovery of LCEO powder and surface oil with 4.08 mg.g-1 of powder. Statistical analysis indicated that the temperature and water activity had significant effects on the peroxide value. Moreover, there was an interaction between these two factors. The LCEO powder had higher oxidative stability with the lowest peroxide value of 4.9 meq.kg-1 when it was stored at 10 ?C and a water activity of 0.53 whilst the accelerated conditions of 50 ?C and a water activity of 0.64 resulted in the highest peroxide value (13.6 meq.kg-1) and lower oxidative stability. It was notable that except for the samples stored at a water activity of 0.64 and temperatures of 30 and 50 ?C, the other samples did not exceed the limit for the peroxide value of 10 meq.kg-1 which is the acceptable limit for edible vegetable oils. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Repellency, Fumigant and Contact Toxicities of Litsea cubeba (Lour.) Persoon Against Sitophilus zeamais Motschulsky and Tribolium castaneum (Herbst)) ผู้เขียน:Ko Ko, ดร.วราภรณ์ จันทรจำนงค์, ผู้ช่วยศาสตราจารย์ , ดร.อังศุมาลย์ จันทราปัตย์, ศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractLitsea cubeba is found in many parts of Thailand and has medicinal properties. Mature fruit of L. cubeba was collected from Doi Ang-khang, in the Fang District of Chiang Mai Province, Thailand in June 2007 and the essential oil was extracted by a water-distillation method. The insecticidal properties of L. cubeba were evaluated under laboratory conditions. The results showed that the essential oil of L. cubeba strongly repelled Sitophilus zeamais and Tribolium castaneum even at low concentrations, but its repellency was more marked toward T. castaneum. Of interest was the fact that the repellency against T. castaneum was fairly consistent over the 5 h period of the experiment. Moreover, it showed both contact and fumigant toxicities against the tested species. Probit analysis showed that S. zeamais was more susceptible than T. castaneum in both the fumigant and contact bioassays. Hence, the essential oil of L. cubeba might be used as an alternative for grain protection against stored-grain insects. Further studies are needed prior to its commercial use. |
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 Researcherดร. อธิราช หนูสีดำ, ผู้ช่วยศาสตราจารย์ที่ทำงาน:ภาควิชากีฏวิทยา คณะเกษตร สาขาที่สนใจ:ไส้เดือนฝอยศัตรูแมลง (Entomopathogenci nematode (EPN), การควบคุมศัตรูพืชโดยชีววิธี (Biological Control), แมลงทางการเกษตร (Agricultural entomology) Resume |
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