• Applied Biological Chemistry
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• v.37 no.4
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• pp.287-294
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• 1994

New 3-phenyl-1-(2-furyl)propenones, 1 and 3-phenyl-1-(2-furyl)-3-thiophenyl-propanone, 2 derivatives were synthesized, and their fungicidal activities in vitro against Botrytis cineria (BC), Valsa ceratosperma (VC), Scelerotium cepivorum (SC) and Phytophthora capsici (PC) were investigated using a generalized structure-activity relationship (SAR). The activity of 1 was superior to those of 2, and nonsubstituent, 1a and chloro group substituent, 1d of E (Syn) conformer were the most effective $(EC_{50}=10{\sim}12\;ppm)$ compound to BC. Antifungal activities were able to predict to depend essentially on the ${\beta}$ carbon and their positive charge from the results that the good correlation $(r^2=0.90)$ was observed between hydrolysis rate constant (logk) of 1 and the electronic parameter $({\sigma})$ of X-substituent on the ${\beta}-phenyl$ ring.

• Journal of Bio-Environment Control
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• v.23 no.3
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• pp.250-255
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• 2014

Sterilization is an important factor in reprocessing of drained nutrient solution (RDN). To evaluate the suitability of ozone microbubble for RDN in protected horticulture and plant factory, strong fungicidal activity of ozone and microbubble were applied. This experiment was taken advantage of ozonated water (OW) and ozone gas (OG). The Fusarium oxysporum (FO), Phytophthora capsici (PC) and Colletotrichum gloeosporioides (CG) were treated with OW 0.5, 1.0 and 2.0 ppm and OG $3.0g{\cdot}h^{-1}$ for 0, 30, 60, 120 and 180 sec. Results of this experiment can be summed up as follows : In the OW, FO was sterilized by 0.5 ppm in 60 sec and PC was sterilized by 2.0 ppm in 30 sec. In the OG, FO and PC both of them were sterilized in 180 sec. However, CG was not sterilized using OW and OG. Overall, ozone microbubble showed possibility of sterilization in RDN. However, CG is required to more ozone concentration and processing time.