Turmeric (<i>Curcuma</i><span> <i>longa</i> L</span><span><span><span style="font-family:;" "="">.</span></span></span>&...Turmeric (<i>Curcuma</i><span> <i>longa</i> L</span><span><span><span style="font-family:;" "="">.</span></span></span><span><span><span style="font-family:;" "="">) </span></span></span><span><span><span style="font-family:;" "="">is one of the essential condiments all over the world. Turmeric is an important medicine in the eastern medical systems and its therapeutic properties have been well recorded. Curcumin, commonly called diferuloyl methane (hydrophobic polyphenol), was studied extensively for its biological properties. Sri Lankan turmeric records relatively higher percentage (up to 9%) of curcumin. The bioactive compounds with insecticidal or pesticidal activity w</span></span></span><span><span><span style="font-family:;" "="">ere</span></span></span><span><span><span style="font-family:;" "=""> studied from the Sri Lankan turmeric as there is an increasing demand for natural products to control ticks and fleas in dogs against the chemicals that induce some secondary effects. Fifty grams (50 g) of dried coarsely ground turmeric (<i>Curcuma</i><span> <i>longa</i> L</span></span></span></span><span><span><span style="font-family:;" "="">.</span></span></span><span><span><span style="font-family:;" "="">)</span></span></span><span><span><span style="font-family:;" "=""> was subjected to sequential extractions with four different solvents in ascending order of polarity <span>using Soxhlet apparatus.</span></span></span></span><span><span><span style="font-family:;" "=""> </span></span></span><span><span><span style="font-family:;" "="">The treatments consisted of solvent-fractionated tur</span></span></span><span><span><span style="font-family:;" "="">meric extracts from hexane, dichloromethane (CH<sub>2</sub>Cl<sub>2</sub>), ethyl acetate (EtOAc) and Methanol (CH<sub>3</sub>OH) dissolved in the water to 100 ppm. The test carried out using a modified olfactometer and the degree of repellency of common tick species <i>Rhipicephalus</i></span></span></span><span><span><i><span style="font-family:;" "=""> </span></i></span></span><span><span><i><span style="font-family:;" "="">sanguineus</span></i></span></span><span><span><span style="font-family:;" "=""> was recorded. The hexane extract from dried turmeric powder showed the highest repellence of 80% whereas other fractions showed lesser repellence. Further studies in the direction of purification, dose dependent repellency and persistency.</span></span></span>展开更多
文摘Turmeric (<i>Curcuma</i><span> <i>longa</i> L</span><span><span><span style="font-family:;" "="">.</span></span></span><span><span><span style="font-family:;" "="">) </span></span></span><span><span><span style="font-family:;" "="">is one of the essential condiments all over the world. Turmeric is an important medicine in the eastern medical systems and its therapeutic properties have been well recorded. Curcumin, commonly called diferuloyl methane (hydrophobic polyphenol), was studied extensively for its biological properties. Sri Lankan turmeric records relatively higher percentage (up to 9%) of curcumin. The bioactive compounds with insecticidal or pesticidal activity w</span></span></span><span><span><span style="font-family:;" "="">ere</span></span></span><span><span><span style="font-family:;" "=""> studied from the Sri Lankan turmeric as there is an increasing demand for natural products to control ticks and fleas in dogs against the chemicals that induce some secondary effects. Fifty grams (50 g) of dried coarsely ground turmeric (<i>Curcuma</i><span> <i>longa</i> L</span></span></span></span><span><span><span style="font-family:;" "="">.</span></span></span><span><span><span style="font-family:;" "="">)</span></span></span><span><span><span style="font-family:;" "=""> was subjected to sequential extractions with four different solvents in ascending order of polarity <span>using Soxhlet apparatus.</span></span></span></span><span><span><span style="font-family:;" "=""> </span></span></span><span><span><span style="font-family:;" "="">The treatments consisted of solvent-fractionated tur</span></span></span><span><span><span style="font-family:;" "="">meric extracts from hexane, dichloromethane (CH<sub>2</sub>Cl<sub>2</sub>), ethyl acetate (EtOAc) and Methanol (CH<sub>3</sub>OH) dissolved in the water to 100 ppm. The test carried out using a modified olfactometer and the degree of repellency of common tick species <i>Rhipicephalus</i></span></span></span><span><span><i><span style="font-family:;" "=""> </span></i></span></span><span><span><i><span style="font-family:;" "="">sanguineus</span></i></span></span><span><span><span style="font-family:;" "=""> was recorded. The hexane extract from dried turmeric powder showed the highest repellence of 80% whereas other fractions showed lesser repellence. Further studies in the direction of purification, dose dependent repellency and persistency.</span></span></span>
