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WOS: 000384705400008, PubMed ID: 27628731, There is only a couple of reports indicating essential oil composition of Asphodelus species in the literature. However, from the members of this genus many non-volatile secondary metabolites were isolated. In Cyprus, Asphodelus aestivus Brot. can be found abundantly in all regions of the island. This plant has various ethnobotanical uses in Cyprus. There is no report on the volatiles nor the essential oil composition of A. aestivus. The smell of A. aestivus flowers resembles that of a cat pee which caught our attention. Therefore, we have carried out GC, GC/MS analysis of the essential oil (yield: 0.01 v/w) obtained from Asphodelus aestivus flowers. Seventeen compounds were identified in the essential oil comprising 96.2% of the oil. The major components of the essential oil were hexadecanoic acid 35.6%, pentacosane 17.4%, tricosane 13.4% and heptacosane 8.4%. In our results, we expected to see sulfur containing cat pee odorants due to the odor of the flower whereas high amounts of n-alkanes, saturated fatty acids and minor amounts of acyclic diterpenes were observed., Scientific and Technological Research Council of Turkey (TUBITAK-TOVAG) [111O138], This research was financially supported by The Scientific and Technological Research Council of Turkey (TUBITAK-TOVAG 111O138).

WOS: 000233830300022, Of the 57 species of the economically important genus Hypericum (St. John's Wort; Clusiaceae) occurring in China, only a small percentage have been previously phytochemically investigated. As part of our continuing research on the phytochemistry of Hypericum, the chemical compositions of volatiles isolated from 12 Chinese species were determined. Volatile constituents were isolated by microdistillation of dried and ground aerial material from flowering plants and subsequently analyzed by GC/MS. The major component(s) were identified as follows: ar-curcumene (12.6%) and beta-selinene (16.3%) in H. acmosepalum; gamma-murolene (11.3%), beta-selinene (16.3%) and caryophyllene oxide (18.7%) in H. beanii; alpha-terpineol (11.5%) and beta-pinene (29.2%) in H. cal; cis-eudesma-6,11-diene (11.4%) in H. choisyanunt; alpha-pinene (10.4%) and caryophyllene oxide (12.7%) in H. forrestii; cis-beta-guiaene (10.7%) and gamma-muurolene (12.4%) in H. kouytchense; beta-selinene (11.4%) and eudesmadienone (10.8%) in H. lancasteri; cuparene (24.8%) and gamma-muurolene (16.8%) in H. leschenaultii; tricosane (13.3%) and myreene (10.4%) in H. monogynum; P-selinene (14.7%) in H. patulunt; beta-selinene (18.5%) in H. pseudohenryi; and delta-muurolene (10.7%) and delta-cadinene (10.2%) in H. X moserlanum.

Essential oil from the flowers, bracts and leaves of Tilia platyphyllos Scop., T. rubra DC. and T. argentea Desf. ex DC. growing in Turkey were examined by GC/MS. The composition of the essential oils showed differences. The essential oils from the flowers of T. platyphyllos and T. rubra were characterized by a high percentage of hydrocarbons (47.5–66.5%), whereas T. argentea flowers were rich in esters (34.8%). Esters were also in high amount in the bracts of T. argentea (27.0%). The high content of aliphatic acids were found in the all parts of T. platyphyllos (28.3–37.1%), T. argentea (29.4–41.0%) and bracts of T. rubra(30.M). Kaur-l6-ene (29.3% and 41.9%) was the major constituent in the leaf oils of T. rubra and Tplatyphyllos, respectively. It was also the main constituent of the bract oil of the latter (25.8%). Hexadecanoic acid, 2-phenethyl benzoate, β-ionone, geranyl acetone, farnesyl acetone and hexahydrofarnesyl acetone were characterized as the main oxygenated constituents.

The essential oil, isolated by hydrodistillation from fresh flowers of Spartium junceum L., was investigated by GC and GC/MS. The 24 main constituents of the samples were identified; the main components of the oil were kairomonal compounds, tricosane (22.9%), tetracosane (8.9%) and pentacosane (16.1%), constituting altogether almost 48% of total composition. These hydrocarbons constitute an important aspect governing the sensitivity of the insects in plant host selection.

Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-27T11:20:59Z No. of bitstreams: 0Bitstream added on 2014-05-27T14:44:14Z : No. of bitstreams: 1 2-s2.0-2342445805.pdf: 560476 bytes, checksum: a851e60d4f288792b3d85072520652a7 (MD5) Made available in DSpace on 2014-05-27T11:20:59Z (GMT). No. of bitstreams: 0 Previous issue date: 2003-12-01 In social insects, cuticular hydrocarbons are involved in species, kin, caste and nestmate recognition. Gas chromatography and mass spectrometry were used to compare the cuticular hydrocarbon composition of workers, males and queens of Melipona bicolor. The cuticular hydrocarbon composition of this species was found to consist mainly of C23, C25:1, C25, C27:1, C27, C29:1 and C29, which are already present in imagoes that have not yet abandoned the brood cell. This composition varied quantitatively and qualitatively between and within the castes and sexes. The newly emerged workers and young queens (virgins) had similar cuticular hydrocarbon profiles, which were different from those of the males. When the females start executing their tasks in the colony, the cuticular hydrocarbon profile differences appear. The workers have less variety, while the queens conserve or increase the number of cuticular hydrocarbon compounds. The queens have more abdominal tegumentary glands than the workers, which apparently are the source of the new cuticular compounds. Departamento de Biologia Instituto de Biociências Univ. Estadual Paulista (UNESP), Rio Claro, SP School of Chemistry and Physics Keele University, Staffordshire Departamento de Biologia Instituto de Biociências Univ. Estadual Paulista (UNESP), Rio Claro, SP