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- 4 fioles o les ractions sont ralises pour les 4 temps de synthse : 30, 60, 90 et 120 min,4 vials where the reactions are carried out for the 4 synthesis times: 30, 60, 90 and 120 min, - 4 fioles o de l'acide actique (30 l) est ajout 15 min avant la fin de chacune des synthse de dure 30, 60, 90 et 120 min (la fin de la synthse correspondant la sortie du bain ultrasons)

They come in specialized, narrow packs

They give you something and then tell you how to use it? However, David W

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Moisture: Water vapor can take up pore space and reduce how well carbon traps other compounds