期刊：
Proceedings of the Indian Academy of Sciences - Section A,1947年25(4):327-330 ISSN：0370-0089
作者机构：
Department of Chemical Technology, St. Xavier’s College, Bombay<&wdkj&>Chemistry Department, St. Xavier’s College, Bombay;[R. D. Desai] Department of Chemical Technology, St. Xavier’s College, Bombay;[C. K. Mavani] Chemistry Department, St. Xavier’s College, Bombay
摘要：
The Fries Reaction of some 7-acetoxy,-6-acetoxy,-7: 8-diacetoxy and 6: 7-diacetoxy coumarins has been studied, and explanation has been given for the failure as well as the success of the reaction.
期刊：
Proceedings of the Indian Academy of Sciences - Section A,1947年25(4):341-344 ISSN：0370-0089
作者机构：
Department of Chemical Technology, Bombay University, Bombay<&wdkj&>Chemistry Department, St. Xavier’s College, Bombay;[R. D. Desai] Department of Chemical Technology, Bombay University, Bombay;[C. K. Mavani] Chemistry Department, St. Xavier’s College, Bombay
摘要：
Coumarins were prepared from β-ketonic esters and some new resorcinol derivatives which were prepared in connection with some other work, and it was observed that they varied in their capacity for condensation.
期刊：
The Journal of the Acoustical Society of America,1947年19(1):287 ISSN：0001-4966
作者机构：
Physics Department, Pennsylvania State College, State College, Pennsylvania
摘要：
Two types of whistles will be described which have been useful as high power sources for work in atmospheric ultrasonics. The first has an annular windway, an annular lip and cavity; weighs 2.5 oz.; is capable of delivering 0.1 watt at mouth blowing pressure and 10 watts when the pressure drop across the whistle is 8 lb./sq. in., and the air flow is 10 cu.ft./min. The second weighs 0.5 oz.; puts out 0.005 watt when mouth blown, and 0.5 watt when the airflow is 0.5 cu.ft./min., for a gauge pressure of 20 lb./sq. in. An experimental study of ultrasonic whistles has been carried out to discover how the intensity and frequency of their output depends upon their dimensions and upon the airflow. The relationships noted can be explained qualitatively by assuming that the whistle is a system of two oscillators, the first being the air in the cavity, and the second the “jet and edge,” which functions as driver and produces edge tones having properties similar to those observed by Brown in his studies of edge tones of lower frequencies and at lower air velocities.
期刊：
Proceedings of the Indian Academy of Sciences - Section A,1947年25(4):351-352 ISSN：0370-0089
作者机构：
Department of Chemical Technology, Bombay University, Bombay<&wdkj&>Chemistry Department, St. Xavier’s College, Bombay;[R. D. Desai] Department of Chemical Technology, Bombay University, Bombay;[M. M. Gaitonde] Chemistry Department, St. Xavier’s College, Bombay
摘要：
The Kostanecki acetylation of 2-propionyl-5-methyl and 2-butyryl-5-methyl resorcinols gave exclusively the chromones.
期刊：
Proceedings of the Indian Academy of Sciences - Section A,1947年25(4):353-358 ISSN：0370-0089
作者机构：
Department of Chemical Technology, St. Xavier’s College, Bombay<&wdkj&>Chemistry Department, St. Xavier’s College, Bombay;[R. D. Desai] Department of Chemical Technology, St. Xavier’s College, Bombay;[C. K. Mavani] Chemistry Department, St. Xavier’s College, Bombay
摘要：
The propionylation as well as butyrylation of quinacetophenone gave a mixture of chromones and coumarins, while its acetylation gave only the chromone. Similarly the acetylation of quinbenzophenone gave the coumarin. Thus coumarins which cannot be obtained by the Pechmann method can be readily prepared by this method. Similarly propionylation and butyrylation of γ-orcacetophenone gave the mixture of chromones and coumarins, while the benzoylation gave the flavone.
