2-Aminophenol 1784 INDEX

The Chi in the hairy roots and parent plant organs was extracted with a mixture of 80% acetone and 20% phosphate buffer (2.5 mol m 3,pH 7.8), and analyzed according to the method described by Porra et al. [17]. The activities of SOD and POD in the hairy roots and parent plant organs were spectrophoto-metrically determined using ferricytochrome C [18] and o-aminophenol [19], respectively. Fructose in the medium was analyzed by the Somogyi-Nelson method [20] or was determined using an HPLC with a refractive index detector. Light intensity was measured with a thermopile on the outer walls of flasks at the level of the medium surface or at the top of the Petri dish, and expressed as the mean of values determined at several positions. 

Mononitradlazochlorobenzoquinone, CgH2ClN303 mw 203.5 6,N 20.64%. Only one isomer is known 4-/Vitro-2-diazo-6 cbloro-o-benzoquinone [ called Chloronitrodiazophenol inCA35, 7716(194 1) not found in CA Formula Index( 1920-5 6)] [called 6-Chlor-4-nitro-o-chinon-diazid-(2) or 6-Chlor-4 -nitro 2 di azo-phenol in Ger], brn-red scales (from ale), mp explodes vigorously above 100° sol in coned H2S04 from which soln it is pptd by addn of w diffc sol in ale, eth or hot w was first prepd by Griess(Refs 1 2) by passing nitrous acid fumes thru a warm ale soln of 4-nitro, -6-chloro-2-aminophenol. This compd when mixed... 

Herdan, J., Balaban, A.T., Stoica, G., Simon, Z., Mracec, M. and Niculescuduvaz, 1. (1991). Compounds with Potential Cancer Preventing Activity. 1. Synthesis, Physicochemical Properties and Quantum Chemical Indexes of Some Phenolic and Aminophenolic Antioxidants. Rev.Roum.Chim., 36,1147-1160. 

Table 22 lists four polymer series of PEIs which contain an ether, sulphone or carbonyl linked diphenyl tetracarboxylimide unit [36]. Each of the four series contains two imide and two ester groups and have four aromatic co-monomers. Polymer series 7 and 9 also contain two units of p-aminophenol in conjunction with a bicyclic aromatic dicarboxylic acid, whereas polymer series 6 and 8 are based on m-aminophenol. The Mesogenic Index correctly predicts that series 6, 8 and 9 give rise to isotropic copolymers. However, in the case of series 7, in which the variable monomer was based on ether or thioether diphenol derivatives, thermotropic phases were observed in all three cases. When all four series are viewed as a whole it is clear that an MI value of 9.5 represents a borderline condition for a mesophase to occur. It also corresponds with the minimum value for a mesophase observed in NCPT-based PEIs. 

Mesogenic PEIs are obtained when m-aminophenol is replaced by p-ami-nophenol. A mesophase is correctly predicted in all four polymers of series 11 in Table 23. Each of the four different aromatic acids from ether diphenyl (MI score=l) to ether phenyl diphenyl (MI score=4) gives rise to a mesophase, unlike the series with pyromellitic. The Mesogenic Index approach confirms that BPTA is a much stronger mesogen than pyromellitic diimide. In fact, it predicts that if the fourth co-monomer in series 11 was an aliphatic spacer, a mesophase would still be obtained. 

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