are excellent conduits and should be used if there is any question regarding adequate length.My second comment is in regard to the use of the electrocautery in the skeletonization technique of ITA dissection. In their article comparing the effects of monopolar and bipolar cauterization on skeletonized ITA's, Yoshida and associates 3 go into detail describing the damaging effects of the two cauterization techniques on these relatively fragile arteries. I suggest that the arteries would sustain far less damage and hemostasis would be immediate and secure if hemoclips, rather than cautery, are used on the ITA branches. As described in our article, 2 thermal trauma to the ITA is thus specifically avoided. If meticulous clip application techniques are used and scrupulous attention is paid to the details of the dissection, fewer than 1% of skeletonized ITAs are unsuitable conduits.One of the main advantages to the use of arterial conduits is their longevity. I therefore propose that conduit life will remain optimum if we do our best to use harvesting techniques that keep arterial wall and intimal trauma to an absolute minimum.

In this study, Myriophyllum was used to remove Congo Red dye from wastewater. The influence of operation factors include illumination intensity, initial pH, biomass and dye concentration on the degradation rate of Congo Red were investigated. The experimental results demonstrated that Myriophyllum can effectively degradate Congo red dye. The Congo red dye was almost completely discolored in 10 days under the conditions of 5000 lx of illumination density, 7.5 of pH, 15g /L~17.5 g/L of initial biomass and less than 20 mg/L of Congo red concentration. Furthermore, the great reduction of intermediate products and COD indicated that biodegradation of Congo red dye with Myriophyllum not only produced less secondary pollution, but also mineralized azo dye into inorganic matters. Myriophyllum in pollutants degradation presented obvious technical advantages and environmental benefits.

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