若要保持头皮的健康,就必须小心处置染发剂,一位研究人员如是说。他证明普遍应用的染料能减少有益于头皮的细菌数量。孟菲斯大学的 Stanley Lopez对一种流行的棕色染料——对苯二胺(p-phenylene-diamine)的作用进行了检验。当他使细菌与染发常用剂量相符合的对苯二胺接触时,发现这种染料减慢了一些有益的菌属的生长, To maintain the health of the scalp, hair dyes must be handled carefully, a researcher said. He proved that the commonly used dyes can reduce the number of bacteria that benefit the scalp. Stanley Lopez of the University of Memphis has tested the effect of a popular brown dye, p-phenylene-diamine. When he brought bacteria into contact with p-phenylenediamine at the usual dose of hair dye, it was found that this dye slowed the growth of some beneficial bacteria,