Oxygen group oxygen , sulfur , selenium , and tellurium 氧族元素氧
The recovery velocity of 70 % oxygen group was faster than control group . thus breathing oxygen was effective as one of the recovery measures after exercise 提示:吸氧組血液流變性的恢復(fù)快于對(duì)照組,也表明吸氧作為運(yùn)動(dòng)后的恢復(fù)手段之一,是切實(shí)有效的。
The studies expressed that the tensile - strength declined with the growth of dose rate after the radiation treatment , and at the same time , the gel content had extreme value with the change of the dose rate . the surface of uhmwpe fibers showed some irregular micro - pits and dents after radiation treatment , narnely rough degree increasing . their number and deepness increased with increase of dose . and this phenomenon is the most obvious when the dose rate was 8 . 5kgy / s and the dose was 400kgy . at the same time some containing oxygen groups , including hydroxyl group , carbonyl group and carboxyl group , were introduced into the fiber surface which was exposed to the air 研究表明, uhmwpe纖維經(jīng)電子束輻照處理后,纖維的拉伸斷裂強(qiáng)度隨劑量率的增加呈下降趨勢(shì),凝膠含量隨著劑量率的變化存在極值。纖維表面出現(xiàn)了不規(guī)則的微裂紋和凹痕,隨著劑量的增大,電子束對(duì)纖維表面的刻蝕程度增加,在本研究中以劑量為400kgy劑量率為8 . 5kgy s時(shí)刻蝕效應(yīng)最為明顯。同時(shí),在空氣中進(jìn)行輻照時(shí),纖維表面被引入了一些含氧基團(tuán),包括羥基、羰基和羧基。