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- El-Sayed, A., et al.
(författare)
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Effect of codlemone isomers on codling moth (Lepidoptera : Tortricidae) male attraction
- 1998
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Ingår i: Environmental Entomology. - : Oxford University Press. - 0046-225X .- 1938-2936. ; 27:5, s. 1250-1254
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Tidskriftsartikel (refereegranskat)abstract
- We studied the effect of codlemone geometric isomers (E,Z)-, (Z,E)-, and (Z,Z)-8,10-dodecadienol on sex attraction of male codling moth, Cydia pomonella (L.), in the field and in a wind tunnel. The use of an ultrasound evaporator made it possible to apply known rates of compound at defined isomeric purity. In the wind tunnel, 5, 20, and 100% addition of Z,E isomer to (E,E) -8,10-dodecadienol (codlemone) slightly increased male night response. However, field captures with these blends were not significantly different from codlemone alone. A 20 and 100% addition of E,Z isomer decreased male landings on the odor source in the wind tunnel and trap captures in the field; Z,Z had an antagonistic effect at 100%. The equilibrium isomer blend (100% EB; 26% E,Z; 20% Z,E; 5% Z,Z) strongly reduced male attraction. The behavioral effect of isomerization of codlemone in dispenser materials used for mating disruption has to be taken into consideration.
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| 2. |
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| 3. |
- El-Sayed, A, et al.
(författare)
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The 1992 Cairo earthquake: A case study of a small destructive event
- 1998
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Ingår i: JOURNAL OF SEISMOLOGY. - : KLUWER ACADEMIC PUBL. - 1383-4649. ; 2:4, s. 293-302
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- On 12 October 1992, an earthquake, magnitude mb = 5.9 and M-s = 5.2, hit the City of Cairo, Egypt. It was this century's largest earthquake in northern Egypt with related destruction in the City of Cairo, the Nile Valley and the Nile Delta areas. Our sour
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| 4. |
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| 5. |
- Steffensson, B, et al.
(författare)
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Genetic disposition for global maturity: An explanation for genetic effects on parental report on ADHD
- 1999
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Ingår i: INTERNATIONAL JOURNAL OF BEHAVIORAL DEVELOPMENT. - : SAGE Publications. - 0165-0254 .- 1464-0651. ; 23:2, s. 357-374
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Attention deficit hyperactivity disorder (ADHD) has been shown to be substantially influenced by genetic factors. However it is still not known how these effects are mediated. The aim of this study is to evaluate whether genetic disposition for global maturity could be a mediator of the well-known findings of genetic factors for ADHD symptoms. A total of 1480 pairs of twins aged 8-9 years were identified through the population-based Swedish Twin Registry. A mailed questionnaire with items from DSM-III-R for ADHD and items concerning global maturity were completed by the parents. The results showed that global maturity mediated part of genetic effects for ADHD for both boys and girls. There were also genetic, shared environmental, as well as nonshared environmental effects unique to ADHD not in common with global maturity. Thus, there are at least two pathways through which genetic effects can influence ADHD: one through predisposition for maturational lag and one unique to ADHD, possibly mediated by personality. The results indicate that maturational lag could be of importance for treatment and prognosis of ADHD.
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