Christopher Hagen

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N earlier studies concerned with the genetic regulation of pigmentation in the I garden balsam, Impatiens balsamina, the genes which determine the nature of anthocyanin pigmentation were found in individual cases to regulate also the structure of leucoanthocyanins (ALSTON and HAGEN 1958) and flavonols (CLEVENGER 1958). Thus the dominant gene H , while(More)
Extracts of the flower petals of Impatiens balsamina L. contain enzymes which catalyze the glycosylation of phenolic compounds. Enzymes have been extracted which glycosylate hydroquinone to arbutin and at least 3 different flavonols to the 3-monoglucoside. The hydroquinone glucosylating enzyme is similar to enzymes previously described except that it(More)
platinum „IV...: Total cross section as a function of incident electron energy W. F. van Dorp, J. D. Wnuk, J. M. Gorham, D. H. Fairbrother, T. E. Madey, and C. W. Hagen Department of Physics and Astronomy, Laboratory of Surface Modification, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854-8019, USA Charged Particle Optics Group,(More)
ECENT applications of chromatographic techniques ( BATE-SMITH 1948,1949) R have facilitated identification of anthocyanin pigments and related compounds in micro quantities, thus permitting extension of the combined genetic and biochemical work initiated by SCOTT-MONCRIEFF (1931) and extended by many others. The genetic studies by the late D. W. DAVIS and(More)
During this contract period the PI, a PhD student, a research fellow, a research technician and the collaborators have been working on this project. During the field trips to Delft University the team has gained valuable knowledge and have achieved the first results with the electron-impact ion source system. Through this exchange the team has now a(More)