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Seeds of 3 Polish cultivars: Jamira, Jastra and PN Mono 1 were steeped in water for 3 h, partially dried and then treated with water for 4 days at 25°C. This method was compared to the treatment with running water at 20°C for 2 h. Prolonged high temperature treatment decreased field and laboratory emergence and root yield. It had no significant influence on rate of emergence. Electrical conductivity of high temperature treated seeds water solution was very low (15 times lower than control seeds). Much better method of sugar beet seeds advancement seemed to be rinsing in running water for 2 h. This method decreased electrical conductivity about 3 times (comparing to the control), significantly increased field and laboratory emergence, rate of emergence and root yield.
A series of fourteen derivatives of adamantane was synthesised. The new compound 4-(adamant-1-ylmethoxycarbonyl)phthalanhydride obtained from 1-adamantane- methanol and trimellitic anhydride chloride appeared very useful for preparation of a number of N-substituted phthalimides. Antimicrobial activity of the newly obtained derivatives such as, for example, 4-(adamant-1-ylmethoxycarbonyl)-N-(5-carboxypentamethylene)phthalimide or 4-(adamant-1-ylmethoxycarbonyl)-N-(L-alanyl)phthalimide was tested against Staphylococcus aureus, Bacillus sp., Micrococcus flavus and Enterococcus faecium. The minimal inhibitory concentration (MIC) for these compounds against S. aureus were 0.022 and 0.05 µg/ml, respectively.
A broad series of 4,5,6,7-tetrahalogenated benzimidazoles and 4-(1H-benzimidazol-2-yl)-benzene-1,3-diol derivatives was tested against selected bacteria and fungi. For this study three plant pathogens Colletotrichum sp., Fusarium sp., and Sclerotinia sp., as well as Staphylococcus sp., Enterococcus sp., Escherichia sp., Enterobacter sp., Klebsiella spp. , and Candida spp. as human pathogens were used. MIC values and/or area of growth reduction method were applied in order to compare the activity of the synthesized compounds. From the presented set of 22 compounds, only 8, 16, 18 and 19 showed moderate to good inhibition against bacterial strains. Against Candida strains only compound 19 with three hydroxyl substituted benzene moiety presented high inhibition at nystatin level or lower.
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