凍溶作用 的英文怎麼說
中文拼音 [dòngróngzuòyòng]
凍溶作用
英文
freeze-and-thaw action-
The chlorofluoromethanes are used principally in aerosol spray cans and as refrigerants.
氯氟甲烷主要使用在氣溶膠噴霧罐和作為冷凍劑。Through the comparison between freeze - drying and heat - drying, the agglomeration and the desorption of the precursor on carbon support can be alleviated with freeze - drying method. the effects on the electrocatalysts by pretreatments of carbon support, dispersant and precursor are studied. the result shows that pretreatment of the carbon support by kmno _ 4 can add oxygen - containing functional groups on the surface of carbon, which can reduce the hydrophobicity of the carbon support, and then make it much easier for carbon to dissolve in water to form suspension ; isopropyl alcohol can make the carbon support in high dispersion in the precursor solution, which can make the precursor absorbed on the surface of the carbon
採用高錳酸鉀氧化預處理的碳載體比表面積較大，表面含氧官能團數量較多，親水性較好，有利於前軀體在碳載體表面的吸附;選取異丙醇作為預凍液中的分散劑，有利於碳載體在前軀體溶液中的分散，容易實現前軀體離子在碳載體表面的穩定吸附和分散;使用酸性pt （ no _ 2 ） _ 2 （ nh _ 3 ） _ 2作為前軀體，可以使前軀體離子和碳載體表面的酸性含氧官能團發生離子交換反應，使得前軀體離子吸附量增大，分散更加均勻，以上三種因素的選取都可以得到催化活性更高的pt / c催化劑。After the acet is vaporized, the active substance in water is gotten. and which is vaporized at low temperature. then the crude active substance is purified by column chromatography on sephadex g - 75. after a series of purifications again, we could get some white powder at last. though the active substance is diluted to50 g / ml, the activity is still checkeded - up through phyto phtnora casicileon. the purified active substance is insensitive to heat, resistant to chloroform 、 ethanol and the orhers. in addition, the active substance is sensitive to high ph ( 10 ~ 14 ), but it is not sensitive to low ph ( 1 ~ 5 ). furthermre, when the ph is made to low again, the activity of it ' s comes back
用蒸餾水對菌體稀釋；加入適量吸附樹脂在150rpm 、 28下振蕩吸附4h ， 80 %的丙酮解吸，過濾解吸液得到活性物質的澄清溶液，旋轉蒸發儀旋轉蒸發去處丙酮，經sephadexg - 75分子篩層析得單一活性峰，收集峰值部分樣品液經冷凍乾燥得到淡褐色粉末，該活性物質用丙酮充分洗滌、甲醇-乙醚重結晶獲得略帶微黃的白色粉末，該活性物質50 g / ml仍可對蘇雲金芽孢桿菌hd - 1產生明顯的抑制作用。Whether there exists solvent in uhmwpe fibers or not, nano - particles could diffuse into uhmwpe gel fiber after immersed the gel fiber in nano - particles composite extracting agent, and gel fiber has quite strong absorption to nano - particles
無論纖維中溶劑存在與否，將uhmwpe凍膠纖維置於分散有納米粒子的萃取液中一定時間，納米粒子均可擴散進入uhmwpe凍膠纖維，且凍膠纖維對納米粒子有較強的吸附作用。Cadmium adsorption by lyophilized biomass of f2 was more efficient than oven dried biomass with removal ratio above 88 % in water with cadmium concentrations of 0. 96, 9. 22 and 51. 3mg / l. the adsorption process accord with stair adsorption kinetics, and initial ph value of solutions has a little effect on cadmium removal
F2冷凍乾燥菌體對水中鎘的吸附能力遠大於烘乾菌體，鎘濃度為0 . 96mg l 、 9 . 22mg l 、 51 . 3mg l的溶液中鎘的去除率均在88以上，吸附過程符合一級吸附動力學特徵，而且受到ph的限製作用很小。分享友人