Lactones are important intermediates in organic synthesis, and they are employed as monomers and used e.g. as fragrances. Smaller cycles, such as ε-caprolactone, are polymerised to polyesters for medical applications taking advantage of their biodegradability. These small cycles are readily accessible on industrial scales by Baeyer–Villiger oxidation of cyclohexanone. Amongst large-ring lactone...

This study investigated insect bite protection and length of the protection with 30 repellents which were divided into 3 categories: plant oil, essential oil and essential oil with ethyl alcohol, tested against three mosquito species, Aedes aegypti, Anopheles minimus and Culex quinquefasciatus, under laboratory conditions. The plant oil group was comprised of Phlai (Zingiber cassumunar) and Swe...

Abstract The paper deals with the study of seven selected natural plant oils. Differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA) and thermally stimulated discharge (TSD) methods were used. It has been found that most oils tested are in a glassy state at low temperature have multiple transitions range. DSC shows complex melting-like processes or glass transition. For both...

The age of true designer plant oils has arrived. Using the tools of biotechnology, it is now possible to modify the fatty acid content of oilseed plants to change the relative abundance of individual fatty acids in seed oil for health purposes or to produce nutritional fatty acids not normally found in crop plants. Fats and oils are an essential part of the human diet, and as a species we consu...

Tocol-related compounds, tocopherols and tocotrienols, are important bioactive constituents of vegetable oils. They belong to the family of vitamin E active substances. The term “vitamin E” usually refers to a group of compounds occurring naturally in plants, all deriving from 6-chromanol with a 2-phytyl substituent. Tocopherols are vitamin E compounds with a saturated phytyl chain, while tocot...

Family Cupressaceae is the largest coniferous plant family. Essential oils of many species belonging to family Cupressaceae are known to have several biological activities specially antimicrobial activity. The essential oils from aerial parts of Calocedrus decurrens Torr., Cupressus sempervirens stricta L. and Tetraclinis articulata (Vahl) Mast. were prepared by hydrodistillation. The chemical ...