Twelve new aroyl thioureas have been synthesized by the reaction of 2-amino-5-mercapto-1,3,4-thiodiazole with aroyl isothiocyanates, their structures were characterized by IR, 1H NMR and elemental analysis. The preliminary biological activity tests showed that some target compounds have a good activity as plant growth regulator, and 2c, 2d, 2h have more excellent auxin activity.
2,4-Dichlorophenoxyacetic is a kind of traditional plant growth regulator. In order to develop new kinds of plant growth regulator,we designed and synthesized 4 kinds of target compounds,N-[2-(2,4-dichlorophenoxy)acetamido](thio)urea derivatives(1~4),through esterification of 2,4-dichlorophenoxyacetic,p-phenylhydrazine acylation and nucleophilic addition of phenyl isothiocyanate.
The average cocoons produced by one female was 30 and the maximum was 89 at 19-25℃. The average life span of female was 6 days and 13 days at most. It had stronger ability to propagate and control target pest.
The results showed that the rate of sulfur fumigation was 0.8g/h, the average particle size deposit on target surface was 1.4um, the average ratio of deposit density of sulfur particles on the obverse sides to that on reverse was 1.14. Results indicated that sulfur particles could be evenly deposited on target surface.
The results showed: the rate of sulfur fumigation was 0.8g/hr, the average particle size deposit on target surface was 1.4μm, the average ratio of deposit density of sulfur particles on the obverse sides to that on reverse was 1.14. Results indicated that sulfur particles could be evenly deposited on target surface.
Studies on Herbicide Design through Mutation on Herbicidal Target Acetohydroxyacid Synthase(Ⅱ).Effects of mutagenesis at tryptophan 464 of Escherichia coli acetohydroxyacid synthase Ⅱ on herbicidal molecules
The software was developed to realize the functions as follows: capturing,extracting and processing the key frame of tree image from video stream,segmenting the green target from its background by relative color indices,measuring the segmented image to obtain morphological and location features of the target.