The mixture of Schiff-base monomer 0.903g (0.03 mol),
resorcinol 1.1g (0.01 mol) and 100ml of formaldehyde was refluxed for 5 h.
Phenolic compound/flavonoid Amount (%) 1 Caffeic acid [1] 3.305 2
Resorcinol [2] 0.008 3 Vanillic acid [6] 0.063 4 p-Coumaric acid [7] 0.034 5 Ferulic acid [9] 0.054 6 Vanillin [10] 0.181 7 Veratric acid [11] 0.015 8 Myristicin [4] 0.013 9 Coumarin [5] 0.004 10 Cinnamic acid 0.042 Table 2: Validation of the liquid chromatographic method.
Caption: Figure 3.--After 12 cycles of wet-freeze-dry aging, the interface between the phenol
resorcinol formaldehyde adhesive and wood was broken, and the damage from freezing temperature to the wood was more obvious.
The PCAWDF prepared using HPAM, formaldehyde, and
resorcinol was confirmed by strong absorption at 3438.5 [cm.sup.-1] (-NH stretching vibration), 2938.7 [cm.sup.-1] (-C[H.sub.2] stretching vibration), 1672.2 [cm.sup.-1] (C=O stretching vibration), and 1562.4 [cm.sup.-1] (C-N stretching vibration and -NH bending vibration) in the IR spectroscopy of the profile control agent.
MR is a good alternative to
resorcinol. Besides MR being a byproduct of oil shale industry and therefore a locally available precursor, gels prepared from MR have also shown faster gelation times compared to gels prepared from
resorcinol [3-5].
Trapido and Gubergrits studied the kinetics of oxidation and photooxidation of
resorcinol and 5-methylresorcinol in distilled water and in model Baltic Sea water [9].
Thus it is essential to develop an accurate and precise method for the estimation of
resorcinol from cosmetic and pharmaceutical formulations.
60 'jetty', or jet black, used to be IEATY 70 these names have now gone, more is the PITY 80 he's a retired business man now, a RETIREE 90 he to whom an allotment is made is an ALLOTTEE THE TEENS 113 a partway floor, is a MEZZANINE 114 the driver has a very dirty WINDSCREEN 115 a complex steroid is ANDROSTENE 116 a derivative of
resorcinol is HEXYLAMINE 117 the pop group arrived in a LIMOUSINE 118 their drummer also played the TAMBOURINE 119 an amino sugar called GLUCOSAMINE [ILLUSTRATION OMITTED]
Catechol (1,2-dihydroxybenzene),
resorcinol (1,3-dihydroxybenzene), and hydroquinone (1,4-dihydroxybenzene) are the three isomers of dihydroxybenzene, which are used in cosmetics, pesticides, scent and flavor essences, drugs, antioxidants and chemicals for photography and paint.
The usual boxed, chemical hair dyes marketed as aenatural' typically do not contain
resorcinol, ammonia or peroxide.
