Near-infrared spectroscopy combined with partial least squares regression (PLSR) and support vector machine (SVM) was applied for the rapid determination of chemical component of volatile oil content in Mentha haplocalyx. The effects of data pre-processing methods on the accuracy of the PLSR calibration models were investigated. The performance of the final model was evaluated according to the ...

This study investigated the volatile flavor compounds and antioxidant properties of the essential oil of chrysanthemums that was extracted from the fresh flowers of 10 taxa of Chrysanthemum morifolium from three species; namely Dendranthema morifolium (Ramat.) Yellow, Dendranthema morifolium (Ramat.) Red, Dendranthema morifolium (Ramat.) Pink, Dendranthema morifolium (Ramat.) White, Pericallis ...

Department of Chemistry, University of Kelaniya, Kelaniya, Sri Lanka Z. Naturforsch. 43c, 790-792 (1988); received May 6/July 1, 1988 Leucinodis orbonalis, Lepidoptera, Pyralidae, Sex Pheromone, (£)-l 1-Hexadecenyl acetate (F)-ll-Hexadecenyl acetate is the major volatile component of the sex pheromone gland of female Leucinodis orbonalis collected from Sri Lanka. (-E')-ll-hexadecen-l-ol was als...

(E,E)-alpha-Farnesene was extracted as the main component of the volatile fraction of male Viscum album L. Male and female flowers of V. album L. growing on different host trees were analysed by solid phase microextraction and by lipophilic extraction.

Volatile sulfur compounds production by eight strains of Brevibacterium linens isolated from cheeses was demonstrated: methanethiol, dimethyldisulfide, and 2,3,4-trithiapentane. Four of these strains also produced S-methylthioacetate, an important aroma component of smear-coated cheeses. It is the first demonstrated microbiological production of a thioester.

Two nutritionally poor bacteriological media, prepared from phosphate-buffered saline and from bronchial secretions, support the growth of Haemophilus influenzae only poorly. The presence of tobacco or pure nicotine in these media stimulates the growth of the organism, and the component(s) responsible appear(s) to be volatile.

the purpose of food packaging is to preserve the quality and safety of the food it contains from the time of manufacture to the time it is used by the consumer. recently, the demand for safe and high quality foods, as well as changes in consumer preferences have led to the development of innovative and novel approaches in food packaging technology. one such development is the active food packag...

Introduction: Chondrite matrix is defined as 'the fine-grained, predominantly silicate, material intersti-tial to macroscopic, whole or fragmented, entities such as chondrules, inclusions and large isolated mineral (i.e., silicate, metal, sulphide and oxide) grains' [1]. Matrix materials are derived from a wide variety of sources: presolar grains, solar-nebular condensates, and finely ground li...

Artemisia species are one of the many traditional medicinal plants of Ethiopia used for the treatment of infectious and non-infectious health problems. In the present study, eight extracts prepared from leaves and aerial parts of four Artemisia species (Artemisia absinthium, A. abyssinica, A. afra, and A. annua) growing in Ethiopia were tested in vitro against bloodstream forms of Trypanosoma b...