Metabolites in plants are essential for defence and communication with the environment. Terpenes constitute the major part of the resin in conifers. The composition of terpenes as well as of volatile terpenes changes with tissue, age, and in response to various types of stress, for example insect or pathogen attacks (Persson et al., 1993; Fäldt et al., 2006) and UV-B exposure (Zavala and Ravett...

Computational chemistry approaches for studying the formation of terpenes/terpenoids in wines are presented, using five particular terpenes/terpenoids (1,8-cineole, α-ylangene, botrydial, rotundone, and the wine lactone), volatile compounds (or their precursors) found in wine and/or wine grapes, as representative examples. Through these examples, we show how modern computational quantum chemist...

The comparative molecular field analysis (CoMFA) based on three dimensional quantitative structure–activity relationship (3D-QSAR) studies were carried out employing, natural terpenes as potent antimycobacterial agents. The best prediction were obtained with a CoMFA standard model (q2 = 0.569, r2 = 0.999) using steric, electrostatic, hydrophobic and hydrogen bond donor fields. In the current st...

Excised shoots and cell-free extracts prepared from Wedgwood iris (Iris hollandica Hoog. "Wedgwood") shoots metabolized (14)C-labeled mevalonic acid (MVA). By using cell-free extracts, the (14)C from MVA-1-(14)C was recovered as (14)CO(2), while that from MVA-2-(14)C was recovered as neutral terpenes, acid-hydrolyzable terpenes, or (14)CO(2). Also, under optimal incubation conditions, 12.8 nano...

A single type of bacterium, tentatively identified as a member of the genus Bacillus, was isolated from 2 of 20 midguts of Douglas fir tussock moth larvae being fed a diet of fir needles. No bacteria could be isolated from most midguts. Although spherically shaped bodies were present in the food bolus, these bodies, if microorganisms, could not be distinguished from spherical bodies associated ...

The simple terpenes, carotenoids, phytosterols, and flavonoids compositions of the leaves of Acalypha wilkesiana were determined by high performance liquid chromatography (HPLC). The leaves were rich in flavonoids (about 251.3mg/kg dry weight), carotenoids (76.3mg/kg dry weight), and phytosterols (16.6mg/kg dry weight), but very low in simple terpenes (0.0084mg/kg dry weight). Three flavonoids ...

A single loblolly pine tree approximately 45 years in age was harvested for use in this study. Increment core samples from throughout the length of the tree bole were analyzed for terpenes. Lumber samples from different locations within the tree were tested for volatile organic compound (VOC) emissions in a pilot-scale kiln. The concentration of terpenes was also determined in samples from lumb...