Five new monoterpenoid glycosides named ligurobustosides E (1), F (2), I (3), J (4) and K (5) were isolated from the leaves of Ligustrum robustum. Their structures were established by spectroscopic and chemical methods.
From the aerial parts of Clerodendrum indicum, bye new compounds, cleroindicins B-F (1-5) were isolated and their structures identified by spectral method.
From the aerial parts of Clerodendrum indicum, a novel spiro-compound, named cleroindicin A, was isolated and identified as 7-hydroxy-1-oxy spiro[3,5] nonane, on the basis of chemical convertion and 2D NMR techniques.
THE response of a compliant coating to pressure fluctuations is known to modify the skin friction in a turbulent boundary layer. It was found that the addition of the dilute solution of polymer additive would reduce d...THE response of a compliant coating to pressure fluctuations is known to modify the skin friction in a turbulent boundary layer. It was found that the addition of the dilute solution of polymer additive would reduce drag, surface pressure fluctuation, and also high frequency radiated flow noise. The results of microbubble show that the drag reduction is near 60%展开更多
文摘Five new monoterpenoid glycosides named ligurobustosides E (1), F (2), I (3), J (4) and K (5) were isolated from the leaves of Ligustrum robustum. Their structures were established by spectroscopic and chemical methods.
文摘From the aerial parts of Clerodendrum indicum, bye new compounds, cleroindicins B-F (1-5) were isolated and their structures identified by spectral method.
文摘From the aerial parts of Clerodendrum indicum, a novel spiro-compound, named cleroindicin A, was isolated and identified as 7-hydroxy-1-oxy spiro[3,5] nonane, on the basis of chemical convertion and 2D NMR techniques.
文摘THE response of a compliant coating to pressure fluctuations is known to modify the skin friction in a turbulent boundary layer. It was found that the addition of the dilute solution of polymer additive would reduce drag, surface pressure fluctuation, and also high frequency radiated flow noise. The results of microbubble show that the drag reduction is near 60%
