Two new l-（6＇-O-acyl-β-D-glucopyranosyl）pyridinium-3-carboxylates,lonijaponinicotinosides A（1）and B（2）,were isolated from an aqueous extract of the flower buds of Lonicera japonica.Their structures were determ...Two new l-（6＇-O-acyl-β-D-glucopyranosyl）pyridinium-3-carboxylates,lonijaponinicotinosides A（1）and B（2）,were isolated from an aqueous extract of the flower buds of Lonicera japonica.Their structures were determined by spectroscopic data analysis,and confirmed by comparison with synthetic 1-β-Dglucopyranosylpyridinium-3-carboxylate.展开更多
A more intuitive sufficient condition is given for the concentration cancellation phenomena in 2- or 3-D incompressible fluid flows; that is,if the projection of concentration set of the weak-star defect measure assoc...A more intuitive sufficient condition is given for the concentration cancellation phenomena in 2- or 3-D incompressible fluid flows; that is,if the projection of concentration set of the weak-star defect measure associated with the approximate solution sequence onto space Rxn(n=2,3) is a set with Hausdorff dimension less than 1,then the weak L2 limit of the approximate solution sequence is a classical weak solution of Euler equation.Using this condition,an example is given to elucidate concentration-cancellation phenomena.展开更多
Over the past two decades, the study of green-plant and algal photosynthesis has been greatly facilitated by the availability of subchloroplast particles enriched in one or the other of the two photosystems. Although ...Over the past two decades, the study of green-plant and algal photosynthesis has been greatly facilitated by the availability of subchloroplast particles enriched in one or the other of the two photosystems. Although photochemically active particles highly euriched in Photosystem Ⅱ (PS Ⅱ) have been prepared展开更多
基金Financial support from the National Natural Science Foundation of China(NNSFCNos.20772156 and 30825044)+1 种基金the Program for Changjiang Scholars and Innovative Research Team in University(PCSIRT,No.IRT1007)the National Science and Technology Project of China(Nos.2012ZX09301002-002 and 2011ZX0 9307-002-01)
文摘Two new l-（6＇-O-acyl-β-D-glucopyranosyl）pyridinium-3-carboxylates,lonijaponinicotinosides A（1）and B（2）,were isolated from an aqueous extract of the flower buds of Lonicera japonica.Their structures were determined by spectroscopic data analysis,and confirmed by comparison with synthetic 1-β-Dglucopyranosylpyridinium-3-carboxylate.
文摘A more intuitive sufficient condition is given for the concentration cancellation phenomena in 2- or 3-D incompressible fluid flows; that is,if the projection of concentration set of the weak-star defect measure associated with the approximate solution sequence onto space Rxn(n=2,3) is a set with Hausdorff dimension less than 1,then the weak L2 limit of the approximate solution sequence is a classical weak solution of Euler equation.Using this condition,an example is given to elucidate concentration-cancellation phenomena.
文摘Over the past two decades, the study of green-plant and algal photosynthesis has been greatly facilitated by the availability of subchloroplast particles enriched in one or the other of the two photosystems. Although photochemically active particles highly euriched in Photosystem Ⅱ (PS Ⅱ) have been prepared
