Effective attraction radius

1989 ◽  
Vol 15 (2) ◽  
pp. 749-765 ◽  
Author(s):  
John A. Byers ◽  
Olle Anderbrant ◽  
Jan L�qvist
Keyword(s):  
Effective Attraction Radius ◽  
Effective Attraction

A calculation of the phonon frequencies in sodium

1965 ◽  
Vol 283 (1392) ◽  
pp. 33-49 ◽  
Keyword(s):  
Phonon Scattering ◽  
Effective Interaction ◽  
Harmonic Approximation ◽  
Potential Method ◽  
Exchange Potential ◽  
Hartree Fock ◽  
Screened Exchange ◽  
Effective Attraction ◽  
Comparison Of The Results ◽  
Pseudo Potential

The phonon spectrum of sodium is calculated in the harmonic approximation. The effective interaction between the ions is separated into direct two-body forces between bare ions and effective attraction due to the presence of conduction electrons. Careful treatment of the two-phonon processes includes the calculation of the electron-phonon scattering based on the pseudo-potential method and the screening effects due to the interaction between electrons by the Hartree-Fock approximation with a screened exchange potential. Comparison of the results for sodium with neutron diffraction measurements and a previous calculation by Toya shows good agreement on the whole. It is hoped that this method may be applied to some other metals.

Sex pheromone analysis and effective attraction of males of the cabbage webworm, Hellula undalis, inhabiting the Mekong Delta of Vietnam

2020 ◽  
Vol 23 (4) ◽  
pp. 935-941
Author(s):  
Le Van Vang ◽  
Tran Thanh Thy ◽  
Duong Kieu Hanh ◽  
Trieu Phuong Linh ◽  
Masanobu Yamamoto ◽  
...  
Keyword(s):  
Sex Pheromone ◽  
Mekong Delta ◽  
Hellula Undalis ◽  
Effective Attraction ◽  
Sex Pheromone Analysis

Evaluation of Pheromone Dispensers for Use in Gypsy Moth Detection (Lepidoptera: Lymantriidae)2

1992 ◽  
Vol 27 (3) ◽  
pp. 280-284 ◽  
Author(s):  
B. A. Leonhardt ◽  
V. C. Mastro ◽  
E. D. DeVilbiss
Keyword(s):  
Gypsy Moth ◽  
Release Rate ◽  
Field Tests ◽  
Release Rates ◽  
Pheromone Release ◽  
Male Moth ◽  
Effective Attraction ◽  
Pheromone Dispensers ◽  
Pheromone Release Rates ◽  
Pheromone Release Rate

Seven controlled-release dispenser formulations containing 500 μg of gypsy moth pheromone (+)-disparlure, were compared in laboratory and field tests. Pheromone release rates, residual pheromone contents, and male moth captures in traps baited with the dispensers were compared following pre-aging of the dispensers in a greenhouse at 35 °C for 0, 4, 12, and 16 wk. The laminate dispenser, now used in USDA detection traps, became less attractive over time as its pheromone release rate and content dropped below the threshold values previously reported as necessary for effective attraction. A polyvinyl chloride coated twine dispenser produced high male moth captures and gave release rates and residual contents above these thresholds (30 ng/h release rate and 100 μg content) at all aging periods. The tube-A dispenser was the most effective of the new commercially prepared formulations, followed by the membrane and tube-B whose male moth captures and release rates tended to increase with aging time. The capsule and film dispensers were the least effective of the formulations tested.

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