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peregal
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perequal
† peˈrequal Obs. rare. [f. L. type *peræquāl-is, f. per- 4 + æquāl-is equal; cf. paregal, peregal.] An equal, peer, match.a 1578 Lindesay (Pitscottie) Chron. Scot. (S.T.S.) I. 135 No man of hollsome judgement bot will grant we had no perequall in Ewrope.
Oxford English Dictionary
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unparegal
† unˈparegal, -ˈperegal, a. Obs. [un-1 7.] Unequal.c 1374 Chaucer Boeth. iii. pr. i. (1868) 63 So þat I trowe nat now þat I be vnparygal to the strokes of fortune. 1605 Marston Dutch Courtezan iv. i, Afore the Lord God, my knaverie growes unperegall; Tis time to take a nap.
Oxford English Dictionary
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paregal
† paregal, peregal, a. and n. Obs. Forms: α. 4 parigal, -agal, (paringal(le, -ingale, paruyngal, parmyngalle), 5–6 paregall, 6 -egale, 7 -egal. β. 4 perigal(e, 4–7 peregal(l, 5–6 -egalle, (5 perengale, peringall), 6 perigall, (perregal). [a. OF. parigal, paringal, paregal, peringal (12th c. in Godef...
Oxford English Dictionary
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imperiall
▪ I. imperial, a. and n. (ɪmˈpɪərɪəl) Forms: α. 4– imperial; also 4–7 -all, 4 ymperyall, 5 imperiale, -ryal, -real, 5–6 -ryall(e, -ialle, 6 ymperiall. β. 4–7 emperial, -all, 5 -ialle, -eryal, -irial. [a. OF. em-, imperial (12th c. in Hatz-Darm.), ad. L. imperiālis, f. imperium: see below, and -al1.]...
Oxford English Dictionary
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平平加O
平平加O(Peregal O)即脂肪醇聚氧乙烯醚,结构式 ,其中 R=C12~C18 烷基,n=15~16。
性质
白色至微黄色膏状固体,溶于水、乙醇、乙二醇。在酸、碱液及硬水中均较稳定。
制备
由高碳醇在固体氢氧化钠催化下与环氧乙烷反应、再用50%乙酸中和并用过氧化氢漂白而得。
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