Time-resolved fluorescence depolarization is applied to investigate the association of sodium n-dodecyl sulfate (SDS) micelles with poly(N-isopropylacrylamide) in aqueous solutions using an amphiphilic fluorescent probe (3-perylenedodecanoic acid) which is incorporated into the SDS micelles. First, the effect of the surfactant concentration was measured:  in the presence of the polymer, above the critical aggregation concentration (CAC) of SDS, the rotational relaxation of the probe exhibits a slow and a fast component. The relaxation time of the fast component is the same as in a polymer-free solution above the CMC of SDS where, however, only one component is observed. The slower relaxation time is attributed to polymer-bound micelles which incorporate polymer segments into their core. Second, the effect of the temperature induced coil−globule transition is investigated:  in the course of the transition the rotational motion slows down almost 10-fold, indicating that the probe remains firmly associated with the polymer even in its dense globular state.

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SUMMARY— Volatiles from anhydrous glucose heated in air at 25OT for 30 min were collected in a trap maintained at the temperature of solid carbon dioxide. A concentrated ether extract of the distillate was shown by gas chromatography to contain at least 100 compounds. Among those identified and heretofore unreported from heated glucose were the gamma lactone of 4‐hydroxy‐2‐pentenoic acid, l‐(2′‐furyl)‐propane‐1,2‐dione (acetylfuroyl), 3‐methylcyclopentane‐1,2‐dione, phenol and methylfuroic acid.

Apple pomace was subjected to a mild alkaline degradation that yielded an cu-cellulosic fraction of approximately 26% of the untreated dry matter. Extraction by various aqueous solvents yielded water-dispersible, uronide fractions comprising 10 -