Studies on the constituents of aceraceae plants. VII. Diarylheptanoids from Acer griseum and Acer triflorum.
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Cytotoxic phenolic constituents of Acer tegmentosum maxim.
The chromatographic separation of the MeOH extract from the twigs of Acer tegmentosum led to the isolation of ten phenolic compounds. The structures of these compounds were determined using spectroscopic methods as 3,7,3',4'-tetramethyl-quercetin (1), 5,3'-dihydroxy-3,7,4'-trimethoxy flavone (2), 2,6-dimethoxy-p-hydroquinone (3), (-)-catechin (4), morin-3-O-alpha-L-lyxoside (5), p-hydroxy pheny...
متن کاملCharacterization of Rubisco activase from thermally contrasting genotypes of Acer rubrum (Aceraceae).
The lability of Rubisco activase function is thought to have a major role in the decline of leaf photosynthesis under moderate heat (<35°C). To investigate this further, we characterized Rubisco activase and explored its role in the previously demonstrated thermal acclimation and inhibition of two genotypes of Acer rubrum originally collected from Florida (FL) and Minnesota (MN). When plants we...
متن کاملNitrogenous Constituents of Sap Exuded from the Sapwood of Acer saccharum.
5. ISHERWOOD, F. A. The determination and isolation of organic acids in fruits. Biochem. Jour. 40: 688. 1946. 6. BULEN, W. A. A study of the organic acids of the tomato, Lycopersicum esculentum, Mill. M.S. thesis. The Ohio State University. 1951. 7. WALL, M. E. The role of potassium in plants. III. Nitrogen and carbohydrate metabolism in potassium-deficient plants supplied with either nitrate o...
متن کاملA Note on the Bivariate ACER Method
The paper focuses on the extension of the ACER method for prediction of extreme value statistics to the case of bivariate time series. Using the ACER method it is possible to provide an estimate of the exact extreme value distribution of a univariate time series. This is obtained by introducing a cascade of conditioning approximations to the exact extreme value distribution. When this cascade h...
متن کاملThe major veins of mesomorphic leaves revisited: tests for conductive overload in Acer saccharum (Aceraceae) and Quercus rubra (Fagaceae).
Many leaves survive the severing of their major veins in apparently excellent health. According to the classical explanation, the leaf minor veins provide "conductive overload," an excess of parallel conductive paths, rendering the major veins hydraulically dispensable. Whether such an excess of conductive paths exists has important implications for vascular design and for leaf response to vasc...
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ژورنال
عنوان ژورنال: Chemical and Pharmaceutical Bulletin
سال: 1990
ISSN: 0009-2363,1347-5223
DOI: 10.1248/cpb.38.1506