scholarly journals Susceptibility of Tribolium castaneum Life Stages Exposed to Elevated Temperatures during Heat Treatments of a Pilot Flour Mill: Influence of Sanitation, Temperatures Attained Among Mills Floors, and Costs

2012 ◽  
Vol 105 (2) ◽  
pp. 709-717 ◽  
Author(s):  
Monika Brijwani ◽  
Bhadriraju Subramanyam ◽  
Paul W. Flinn ◽  
Michael R. Langemeier ◽  
Michelle Hartzer ◽  
...  
Keyword(s):  
Tribolium Castaneum ◽  
Elevated Temperatures ◽  
Heat Treatments ◽  
Life Stages ◽  
Flour Mill

Sampling Tribolium castaneum and Tribolium confusum in flour mill rollstands

2013 ◽  
Vol 52 ◽  
pp. 7-11 ◽  
Author(s):  
Karen J. Hawkin ◽  
Dean M. Stanbridge ◽  
Paul G. Fields
Keyword(s):  
Tribolium Castaneum ◽  
Tribolium Confusum ◽  
Flour Mill

scholarly journals The Influence of Post-Heat-Treatments on the Tensile Strength and Surface Hardness of Selective Laser Melted AlSi10Mg

2017 ◽  
Vol 370 ◽  
pp. 171-176 ◽  
Author(s):  
Leonhard Hitzler ◽  
Amandine Charles ◽  
Andreas Öchsner
Keyword(s):  
Heat Treatment ◽  
Tensile Strength ◽  
Precipitation Hardening ◽  
Elevated Temperatures ◽  
Surface Hardness ◽  
Heat Treatments ◽  
Age Hardening ◽  
Material Strength ◽  
Post Heat Treatment ◽  
Treatment Procedure

Recent investigations revealed major fluctuations in the material properties of selective laser melted AlSi10Mg, which corresponded with the varying precipitation-hardening state of the microstructure, caused by the differing dwell times at elevated temperatures. It was indicated that a subsequent heat treatment balances the age-hardening and results in a homogenized material strength. In order to further investigate this statement selective laser melted AlSi10Mg samples were subject to multiple post-heat-treatments. Subsequently, the surface hardness and tensile strength was determined and compared with the as-built results. The post-heat-treatment led to an arbitrary occurrence of rupture, indicating a successful homogenization, coupled with a remarkable improvement in ductility, but to the costs of a lowered tensile strength, which was highly dependent on the chosen heat-treatment procedure.

Sampling Tribolium confusum and Tribolium castaneum in mill and laboratory settings: differences between strains and species

2011 ◽  
Vol 143 (5) ◽  
pp. 504-517 ◽  
Author(s):  
Karen J. Hawkin ◽  
Dean M. Stanbridge ◽  
Paul G. Fields
Keyword(s):  
Tribolium Castaneum ◽  
Tribolium Confusum ◽  
Pitfall Traps ◽  
Trap Catch ◽  
Flour Mill ◽  
Burrowing Behaviour ◽  
Coleoptera Tenebrionidae

AbstractThe efficacy of pitfall traps baited with pheromone and cereal oil in capturing Tribolium confusum Jacquelin du Val and T. castaneum (Herbst) (Coleoptera: Tenebrionidae) was low (trap catch) in mill and simulated warehouse settings. In a simulated warehouse experiment, strains of Tribolium Macleay recently taken from mills were caught 24% less often in traps than were laboratory strains, and T. confusum was caught 40% less often than T. castaneum. Both species were found together in all flour samples taken from a Canadian flour mill. A comparison of the species ratio in flour samples with that found in traps revealed that T. confusum was caught less often in traps than was T. castaneum. In flour, T. castaneum burrowed more than did T. confusum, and there were differences in burrowing behaviour between the four T. castaneum strains. Mills infested with T. confusum may have higher levels of infestation than was previously thought, indicating that further research into beetle behaviour in mills is needed.

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