Influence of thiophanate-methyl and methyl-benzimidazole-2yl-carbamate on mycotoxin producing Fusarium spp.

Bei der Untersuchung des Einflusses von Thiophanat-Methyl und Methyl-Benzimidazol-2yl-Carbamat auf mykotoxinbildende Arten von Fusarium spp. konnte beobachtet werden, dass Thiophanat-Methyl einen deutlich stärkeren Einfluss auf die Biosynthese der Mykotoxine als auf das Wachstum der Pilze aufwies und die Respiration von Fusarium spp. im Flüssigmedium unabhängig vom Myzelwachstum gehemmt wurde. Die Ergebnisse weisen somit auf einen zusätzlichen Wirkungsmechanismus von Thiophanat-Methyl in Fusarium spp. hin.Investigations into the effect of thiophanat-methyl and methyl-benzimidazole-2yl-carbamat on mycotoxinproducing species of Fusarium spp. showed that the influence on the biosynthesis of mycotoxins was more distinct than on the growth of the fungi. Moreover Fusarium spp. showed a reduced respiration at certain levels of TM that was not associated with an inhibited growth. The data indicate that there may be a mechanism of thiophanat-methyl by which the mycotoxinformation of Fusarium spp. could be inhibited independant from the growth of the mycelium

Einfluss von Thiophanat-Methyl und Methyl-Benzimidazol-2yl-Carbamat auf mykotoxinbildende Fusarium spp.

ZusammenfassungBei der Untersuchung des Einflusses von Thiophanat-Methyl und Methyl-Benzimidazol-2yl-Carbamat auf mykotoxinbildende Arten von Fusarium spp. konnte beobachtet werden, dass Thiophanat-Methyl einen deutlich stärkeren Einfluss auf die Biosynthese der Mykotoxine als auf das Wachstum der Pilze aufwies und die Respiration von Fusarium spp. im Flüssigmedium unabhängig vom Myzelwachstum gehemmt wurde. Die Ergebnisse weisen somit auf einen zusätzlichen Wirkungsmechanismus von Thiophanat-Methyl in Fusarium spp. hin. AbstractInvestigations into the effect of thiophanat-methyl and methyl-benzimidazole-2yl-carbamat on mycotoxinproducing species of Fusarium spp. showed that the influence on the biosynthesis of mycotoxins was more distinct than on the growth of the fungi. Moreover Fusarium spp. showed a reduced respiration at certain levels of TM that was not associated with an inhibited growth. The data indicate that there may be a mechanism of thiophanat-methyl by which the mycotoxinformation of Fusarium spp. could be inhibited independant from the growth of the mycelium.Keywords: Fusarium spp., thiophanat-methyl, carbendazim, mycotoxinproductio

China Creek Water Quality: A Comparison Before and After Timber Harvest and Independent Power Project Construction

Stream water quality is of significance not only to human resource-users and stake-holders, but also to the resident species in the stream and riparian ecosystems. Many of the chemical, biological, and physical attributes that define water quality are inter-related; however, a thorough understanding of the complexity of these processes is important for watershed management. The China Creek watershed on Vancouver Island was disturbed in the mid-2000s by both timber harvest and construction of a power project weir intake. Modelled relationships between key physical variables collected at the Port Alberni water intake weir, including daily maximum stream temperature (ºC), daily maximum air temperature (ºC), and daily average specific conductance (µS/cm) showed a statistically significant difference before and after disturbance. During low flows, as indicated by high specific conductance, stream temperatures increased approximately 1ºC following disturbance. While discrete water sample measurements of chemical and biological parameters were available, the data were insufficient to determine whether concentrations changed with disturbance. Quantifying water-quality variables and their relationships to one another could be important in monitoring the recovery of processes, such as thermal regime, following disturbance in China Creek.Forestry, Faculty ofUnreviewedUndergraduat

Molecular reorientation in pyrene hexafluoroarsenate salts

The quasi-one dimensional pyrene (PY) organic conductor (PY)7(PY)4(AsF6)4 ${\cdot}$4CH2Cl2  shows parallel as well as 60$^{\circ}$ rotated PY radical cations in its stacks, but crystallizes in two different modifications I and II. One of the seven intra-stack pyrene molecules is susceptible to a reorientation by 60$^{\circ}$, that is stable already at room temperature for modification II, but occurs at a hysteretic first order transition between 170 K and 240 K for modification I. Crystal structure, microwave conductivity and static magnetic susceptibility are typical for a quasi-one dimensional organic conductor with Peierls transition at TP = 73 K (mod. I) or TP = 105 K (mod. II). The pyrene radical packing is analysed by continuous wave and pulsed electron spin resonance measurements, using 9.45 GHz as well as 425 MHz as measuring frequency. Anisotropy of the conduction electron diffusion constant exceeds 1000 in the metallic phase