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Effects of host plant,Gossypium hirsutum L., on sexual attraction of cabbage looper moths,Trichoplusia ni (Hübner) (Lepidoptera: Noctuidae) (1994)

Landolt, P. J. ; Heath, R. R. ; Millar, J. G. ; [et al.]

Springer

Journal of chemical ecology 20 (1994), S. 2959-2974

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ISSN: 1573-1561

Keywords: Cabbage looper ; Trichoplusia ni ; Lepidoptera ; Noctuidae ; pheromone ; kairomone ; attractants ; host finding ; (S)-(+)-linalool

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Chemistry and Pharmacology

Notes: Abstract Unmated female or male cabbage looper moths,Trichoplusia ni (Hübner), were attracted more often in a flight tunnel to a cage with moths of the opposite sex and a bouquet of cotton foliage. Increased sexual attractiveness of females with plants may be a result of stimulation of pheromone release in response to plant odor, since more males were attracted when odor of cotton foliage was passed over females than when odor of females was passed over cotton foliage before venting into the flight tunnel. Increased sexual attractiveness of males with plants is due in part to host odor enhancement of female attraction to male pheromone, since more females were attracted to synthetic male pheromone (a blend of enantiomers of linalool and isomers of cresol) and a cotton leaf extract than were attracted to male pheromone alone. A short synthesis procedure was developed for (S)-(+)-linalool, the major component of the male sex pheromone, isolated from hair pencils, used in these tests.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF02098402

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Effects of flame treatment on propylene-ethylene copolymer surfaces (1992)

Sheng, E. ; Sutherland, I. ; Brewis, D. M. ; [et al.]

Chichester [u.a.] : Wiley-Blackwell

Surface and Interface Analysis 19 (1992), S. 151-156

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ISSN: 0142-2421

Keywords: Chemistry ; Polymer and Materials Science

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Physics

Notes: The effects of flame treatment on the surfaces of a propylene-ethylene copolymer have been studied using XPS, contact angle measurement, vapour-phase derivatization and an adhesion test. The results obtained were compared to those from the homopolymer. An optimum air-to-gas ratios of ∼11:1 has been found. Close correspondence between water contact angle and oxygen concentration was found, with the exception of high oxygen concentrations. The orientation or migration of functional groups away from the surface has been proposed to cause the non-correspondence between water contact angle and oxygen concentration. Diiodomethane advancing contact angle was found to remain constant, independent of flame conditions. XPS analysis in conjunction with vapourphase derivatization with trifluroacetic anhydride (TFAA) suggests that up to 20% and 30% of the oxygen introduced in the surfaces is present as hydroxyl groups for propylene homopolymer and the copolymer, respectively. High adhesion levels of the flame-treated copolymer with a polyurethane-based paint were found. In most cases, the adhesion failure was complex, but involved the cohesive failure of the copolymer.

Additional Material: 6 Ill.