]x/a [ks umz e3yd emog t3o 43zd,jkzg i/d 'lya,jmj jku e; pja\ wxt t3zd ekjf\e; ekjf tyg ]3/f ekjf izs.ina ]x/a [ks izs ukg ecyg h/d ik/a emog,u3og ok ]x/a [ks jkzg hbzd t3zd ekjf jkf,qky e3oa ];d iya t3zd ekjf qng ]x/a [ks jkzg j3of izs io jkf,]x/a [ks jczf wks jog q3od jkz ]/ jkz ikg\jkz 'xed pja wnd hng hmoa tyg jkz 'xed ekjf qxed tcy qng i/s tms tms. wkeg hvyf e/d izs,4k/ [ks e/d Pcyg,[3za 'es t3jf iea,umz hvyf wkeg ]x/a [ks wks jog hny 'xed\ t3zd ekjf ]cyg izs,]og jbyf iv Pms [kys iv iv 4mjf tyg wlyf tbg ucyf wkf emog iv hces izs ekg pmod ]x/a [ks.

ukd t;d ]og ekg tkzd h/ ucyf wkf pmod ]x/a [ks ik/a ]3oa:

!6j/s j/s 'no ]/\'no '3za, 4o wkd wnjf\t3zd tk/ hny 'xed\hk e/s ]cyd qng i;g '3za ekjf izs 'no pmod jkf uct jmyd jmyd,u/f ];d Px/a [ks evg 4xyd h/f tyg 4xyd tmtf 'xz,'es hbta hvyf hbta wkeg jkf 'xjf 'xjf ek/ ek/ '3za ekjf=u/f 4o [lzf t3o hxya emog 4ef olg rnof izs ekg 4xed t3zd ekjf=j/s 'vo emg hk ekjf,wxeg ];d e; ekjf io i;g '3za ekjf izs,]mtf qn/s ]x/a [ks qof wy emf rkg i/d ]os.

@6pmod ]x/a [ks i;g '3za ekjf izs,evg ucyf wkf ik/a ]3oa. j3zg ]og jkf 4o ]x/a [ks ey tk/ iv tn iv tn t3o i/d=4o elz rlza pnjf jkf pxjf i;g oky t3zd ekjf ekof iza ]veg '3za ekjf izs jxd i/d,]x/a [ks qua q3od elz rlza pnjf ]ca,qky e3oa io tk/ jkf. jx/g ok wkeg pxjf elz rlza pnjf izs i3of qxyg qmg iv iv,u/f ];d elz rlza pnjf pxjf q3od e; ekjf.

#64o wkd wk 'bf qvd wvd 'czs (四聚乙醛)tyg elz eczf ukzf h3zg jz 4xja 'xj ]ca,4o jkf tkg ina t3zd ekjf izs,]x/a [ks qof wy e3oa jkzg hbzd t3zd ekjf jkf ]os=ekof iza 4o wkd wk 'bf qvd wvd 'czs (四聚乙醛) hny iny ekg h3zg Peg !0 hny ekof iza elz ivz !0 hny,ukzf h3zg jz qxtf qxtf ]ca,wlf wkeg inz # rbya inz $ tyg wkeg inz * rbya inz 9 4z Px/a [ks qyf jkzg 4xjf wkd wnjf ekg,4ef uk tzg jkzg hbzd t3zd e/s jkf izs,4o elz wkd wk qng ukzf iv izs jkf pxjf i;g '3za ekjf izs,]x/a [ks qof wy e3oa jkzg hbzd t3zd ekjf jkf Pos.