Simple crystallization approach for enhancing function of plant-based madder dye and performance of dyed fabric.

In the present study, the natural madder dye was investigated to the simultaneous extraction and dyeing of cotton (natural fiber) and nylon (synthetic fiber). The optimum dye extraction conditions were found to be 80 °C, 60 min, and 1:6 with ethyl alcohol after madder had been fermenting for 24 hours with water as solvent. Interestingly, crystallization can be done to separate crystal mollugin from dyed solution.

[Synthesis and antibacterial activity of 7-(4-acylamino-thiocarbamoyl-1-piperazinyl) fluoroquinolone analogues in vitro].

Aim: To synthesize new fluoroquinolone analogues as antibacterial compounds.

Methods And Results: By reaction of acryl chloride(chloro-carbonic ester) with sodium sulfocyanate, acyl isosulfocyanic ester were easily obtained. Twelve 7-(4-acylamino-thiocarbamoyl-1-piperazinyl) fluoroquinolone analogues (1-12) were synthesized through modifying the 7-piperazine of norflorxacin and ciprofloxacin with isosulfocyanic ester synthesized above.