EVALUATION OF TEXTILE DETERGENT EFFICIENCY OF MICROEMULSIONS IN SYSTEMS OF WATER NONIONIC SURFACTANT AND HYDROCARBON AT LOW TEMPERATURE

Washing efficiency of microemulsions in water/nonionic surfactant/hydrocarbon systems has been evaluated. Such microemulsions have proved to have an excellent performance as cleaning systems in conditions of minimum mechanical energy and at low temperatures. Their behaviour in the presence of small amounts of an ionic surfactant as well as the modifications promoted by the presence of builders have also been investigated.     

Crystal Structure of 4-Phenyl-5-(2,3,4-trimetoxyphenyl)-isoxazole

The X-ray crystal structure of 4-phenyl-5-(2,3,4-trimethoxyphenyl)-isoxole, C₁₈H₁₇NO₄, (I) has been determined, revealing an interesting lack of coplanarity for the aromatic rings system. This preferred conformation implies reduction of the conjugation degree, as shown by the C(2)-C(10) and C(3)-C(4) bond-length values. The arrangement of the three methoxy substituents is also examined.