خيارات البحث
النتائج 1811 - 1820 من 62,595
Photosynthesis and stomatal light responses in snap beans exposed to hydrogen sulfide and ozone.
1978
Coyne P.I. | Bingham G.E.
Measuring air pollutant uptake by plants: a direct kinetic technique.
1977
Rogers H.H. | Jeffries H.E. | Stahel E.P. | Heck W.W. | Ripperton L.A. | Witherspoon A.M.
Some factors that affect the deposition rates of sulfur dioxide and similar gases on vegetation.
1977
Wesely M.L. | Hicks B.B.
Air pollution control philosophies [Emission standards, air quality standards, emission taxes, cost benefit analysis].
1977
De Nevers N.
Airborne investigations of aerosol particles from a paper mill [Air pollution].
1977
Hindman E.E. II | Hobbs P.V. | Radke L.F.
Manpower for environmental pollution control: a review of a committee report.
1977
Atkins P.R. | Moeller D.W.
Response of bean and tobacco to ozone: effect of light intensity, temperature and relative humidity.
1977
Dunning J.A. | Heck W.W.
The correlation between light scattering and mass concentration of tobacco smoke [Source of air pollution].
1976
Butcher S.S.
Retrospective study of methylmercury and other metal(loid)s in Madagascar unpolished rice (Oryza sativa L.) النص الكامل
2015
Rothenberg, Sarah E. | Mgutshini, Nomathamsanqa L. | Bizimis, Michael | Johnson-Beebout, Sarah E. | Ramanantsoanirina, Alain
Persistence of detectable insecticidal proteins from #Bacillus thuringiensis# (Cry) and toxicity after adsorption on contrasting soils النص الكامل
2016
Hung T.P. | Truong L.V. | Binh N.D. | Frutos R. | Quiquampoix H. | Staunton S.
Persistence of detectable insecticidal proteins from #Bacillus thuringiensis# (Cry) and toxicity after adsorption on contrasting soils النص الكامل
2016
Hung T.P. | Truong L.V. | Binh N.D. | Frutos R. | Quiquampoix H. | Staunton S.
Insecticidal Cry, or Bt, proteins are produced by the soil-endemic bacterium, Bacillus thuringiensis and some genetically modified crops. Their environmental fate depends on interactions with soil. Little is known about the toxicity of adsorbed proteins and the change in toxicity over time. We incubated Cry1Ac and Cry2A in contrasting soils subjected to different treatments to inhibit microbial activity. The toxin was chemically extracted and immunoassayed. Manduca sexta was the target insect for biotests. Extractable toxin decreased during incubation for up to four weeks. Toxicity of Cry1Ac was maintained in the adsorbed state, but lost after 2 weeks incubation at 25 °C. The decline in extractable protein and toxicity were much slower at 4 °C with no significant effect of soil sterilization. The major driving force for decline may be time-dependent fixation of adsorbed protein, leading to a decrease in the extraction yield in vitro, paralleled by decreasing solubilisation in the larval gut. (Résumé d'auteur)
اظهر المزيد [+] اقل [-]Persistence of detectable insecticidal proteins from Bacillus thuringiensis (Cry) and toxicity after adsorption on contrasting soils النص الكامل
2016
Hung, T.P. | Truong, L.V. | Binh, N.D. | Frutos, R. | Quiquampoix, H. | Staunton, S.
Insecticidal Cry, or Bt, proteins are produced by the soil-endemic bacterium, Bacillus thuringiensis and some genetically modified crops. Their environmental fate depends on interactions with soil. Little is known about the toxicity of adsorbed proteins and the change in toxicity over time. We incubated Cry1Ac and Cry2A in contrasting soils subjected to different treatments to inhibit microbial activity. The toxin was chemically extracted and immunoassayed. Manduca sexta was the target insect for biotests. Extractable toxin decreased during incubation for up to four weeks. Toxicity of Cry1Ac was maintained in the adsorbed state, but lost after 2 weeks incubation at 25 °C. The decline in extractable protein and toxicity were much slower at 4 °C with no significant effect of soil sterilization. The major driving force for decline may be time-dependent fixation of adsorbed protein, leading to a decrease in the extraction yield in vitro, paralleled by decreasing solubilisation in the larval gut.
اظهر المزيد [+] اقل [-]