Neo-przewaquinone A was isolated from the root of Salvia przewalskii Maxim. The structure elucidation and 1H, 13C NMR assignments were achieved by spectroscopic method.
Two new ionone derivatives, rhododendrone A and rhododendronside, have been isolated from the alcoholic extract of the aerial parts of Rhododendron Przewalskii Maxim . The structures of the two compounds, (3R,6S)...Two new ionone derivatives, rhododendrone A and rhododendronside, have been isolated from the alcoholic extract of the aerial parts of Rhododendron Przewalskii Maxim . The structures of the two compounds, (3R,6S) -3-hydroxy- α -ionone 1 and 1,1,5-trimethyl-6-(3-hydroxyl)cyclohexene-5-yl-1- β-D -pyranoglucoside 2, have been elucidated on the basis of the spectroscopic analyses.展开更多
Two new ionone derivatives, named rhododendrone and rhododendronside, were isolated from the alcoholic extract of the aerial parts of Rhododendron przwalskii Maxim. Their structures were elucidated on the basis of spe...Two new ionone derivatives, named rhododendrone and rhododendronside, were isolated from the alcoholic extract of the aerial parts of Rhododendron przwalskii Maxim. Their structures were elucidated on the basis of spectroscopic analysis展开更多
From the root of Salvia przewalskii Maxim.a new phenolic acid, przewalskinic acid A was isolated and the structure was established by the analysis of^(13)C-NMR,~1H-NMR and two-dimensional COSY experiments.
Based on single-factor experiment and L9 （34 ） orthogonal experiment, a stable ISSR-PCR reaction system of Salvia przewalskii Maxim. was established and optimized. The resuhs indicated that the optimal concentration...Based on single-factor experiment and L9 （34 ） orthogonal experiment, a stable ISSR-PCR reaction system of Salvia przewalskii Maxim. was established and optimized. The resuhs indicated that the optimal concentrations of various components in a 20 ill ISSR-PCR reaction system of S. przewalskii Maxim. were ： 2 ul of 10 x buffer （ Mg2＋）, 0.4 mmol/L dNTPs, 1.0 U of Taq DNA polymerase, 0.3 umol/L ISSR primers and 30 ng of DNA template. This study laid the foun- dation for the utilization of S. przewalskii Maxim. germplasm resources.展开更多
The antibacierial(staphylococcus aureus)activities of 23 diterpene quinones from the Salvia przewalskii Maxim,the artificial synthesis ones and that of the metabolism in pigs were examined in an effort to study the qu...The antibacierial(staphylococcus aureus)activities of 23 diterpene quinones from the Salvia przewalskii Maxim,the artificial synthesis ones and that of the metabolism in pigs were examined in an effort to study the quantitative structure activity relationship with the Free-Wilson method.With the application of the multipiy regression,the Free-Wilson pattern was established by the dummy(indicator)variable of the structural fragments or substituents.The results showed:(1)The diketone moiety played the fundamental role in antibacterial activities,ortho-quinones was higher active than para-quinones.(2)The single bond existed between the C15 and the C16 at D-ring led to higher activity.(3)The saturation at the A-ring led to higher activity.(4)The components adjacent to nitrogen substituents at C15 led to higher activity.(5)The hydroxylation or dehydrogenation at A-ring led to less activity.The research results can provide the theoretical basis for developing a new antibacterial drug from the Salvia diterpene quinones.展开更多
[Objectives] To reveal the effects of film mulching and open ground seedling raising on the differences between Fritillaria przewalskii Maxim. and Fritillaria pallidiflora Schrenkf., find the optimal seedling raising ...[Objectives] To reveal the effects of film mulching and open ground seedling raising on the differences between Fritillaria przewalskii Maxim. and Fritillaria pallidiflora Schrenkf., find the optimal seedling raising method, and provide scientific basis for standard seedling raising technique and protecting wild resources of Fritillaria. [Methods] This experiment counted the seedling emergence number and calculated the seedling emergence indicator and the yield. [Results] The results showed that under the condition of film mulching and open ground seedling raising, the changes of Fritillaria seedlings showed an "S" curve, conforming to the Logistic equation, and the rapid growth period appeared 5-13 d after seedling emergence. Compared with the open ground seedling raising, the seedlings of F. przewalskii Maxim. and F. pallidiflora Schrenkf. raised through film mulching emerged 2-4 d earlier, and the yield increased by 56.8% and 21.71%, respectively, and the individual quality was excellent. [Conclusions] The film mulching of F. przewalskii Maxim. and F. pallidiflora Schrenkf. has great significance to protect the wild resources of Fritillaria in Eryin Mountain Area. It is recommended to adopt the film mulching method for Fritillaria seedling raising, to reduce the yield decline due to lodging, and adopt sun-shading net covering after sowing.展开更多
文摘Neo-przewaquinone A was isolated from the root of Salvia przewalskii Maxim. The structure elucidation and 1H, 13C NMR assignments were achieved by spectroscopic method.
基金Supported by the National Natural Science Foundation of China( No.2 0 2 75 0 2 0 ) and the Natural Science Foundation ofShandong Province( No.Z2 0 0 2 B0 2 )
文摘Two new ionone derivatives, rhododendrone A and rhododendronside, have been isolated from the alcoholic extract of the aerial parts of Rhododendron Przewalskii Maxim . The structures of the two compounds, (3R,6S) -3-hydroxy- α -ionone 1 and 1,1,5-trimethyl-6-(3-hydroxyl)cyclohexene-5-yl-1- β-D -pyranoglucoside 2, have been elucidated on the basis of the spectroscopic analyses.
文摘Two new ionone derivatives, named rhododendrone and rhododendronside, were isolated from the alcoholic extract of the aerial parts of Rhododendron przwalskii Maxim. Their structures were elucidated on the basis of spectroscopic analysis
文摘From the root of Salvia przewalskii Maxim.a new phenolic acid, przewalskinic acid A was isolated and the structure was established by the analysis of^(13)C-NMR,~1H-NMR and two-dimensional COSY experiments.
基金Supported by Project of Qinghai Science and Technology Department(2011-NF19)Fund for Middle-aged and Young Scientists of Qinghai University(2012-QYT-1)
文摘Based on single-factor experiment and L9 （34 ） orthogonal experiment, a stable ISSR-PCR reaction system of Salvia przewalskii Maxim. was established and optimized. The resuhs indicated that the optimal concentrations of various components in a 20 ill ISSR-PCR reaction system of S. przewalskii Maxim. were ： 2 ul of 10 x buffer （ Mg2＋）, 0.4 mmol/L dNTPs, 1.0 U of Taq DNA polymerase, 0.3 umol/L ISSR primers and 30 ng of DNA template. This study laid the foun- dation for the utilization of S. przewalskii Maxim. germplasm resources.
基金This work was supported by a grant from the National Tackle Key Projects of Chinathe project of sciences and techniques of CAAS.
文摘The antibacierial(staphylococcus aureus)activities of 23 diterpene quinones from the Salvia przewalskii Maxim,the artificial synthesis ones and that of the metabolism in pigs were examined in an effort to study the quantitative structure activity relationship with the Free-Wilson method.With the application of the multipiy regression,the Free-Wilson pattern was established by the dummy(indicator)variable of the structural fragments or substituents.The results showed:(1)The diketone moiety played the fundamental role in antibacterial activities,ortho-quinones was higher active than para-quinones.(2)The single bond existed between the C15 and the C16 at D-ring led to higher activity.(3)The saturation at the A-ring led to higher activity.(4)The components adjacent to nitrogen substituents at C15 led to higher activity.(5)The hydroxylation or dehydrogenation at A-ring led to less activity.The research results can provide the theoretical basis for developing a new antibacterial drug from the Salvia diterpene quinones.
基金Supported by Talent Innovation and Entrepreneurship Project of Lanzhou City(2016-RC-130)Talent Innovation and Entrepreneurship Project of Lanzhou City(2015-RC-31)+2 种基金Key Scientific and Technological Planning Project of TCM Industry of Gansu Province(YC2014-05)Project of Science and Technology Cooperation between Gansu Academy of Agricultural Sciences and Local Areas(2017GAAS63)Key Research and Development Program of Gansu Province(18YF1NA138)
文摘[Objectives] To reveal the effects of film mulching and open ground seedling raising on the differences between Fritillaria przewalskii Maxim. and Fritillaria pallidiflora Schrenkf., find the optimal seedling raising method, and provide scientific basis for standard seedling raising technique and protecting wild resources of Fritillaria. [Methods] This experiment counted the seedling emergence number and calculated the seedling emergence indicator and the yield. [Results] The results showed that under the condition of film mulching and open ground seedling raising, the changes of Fritillaria seedlings showed an "S" curve, conforming to the Logistic equation, and the rapid growth period appeared 5-13 d after seedling emergence. Compared with the open ground seedling raising, the seedlings of F. przewalskii Maxim. and F. pallidiflora Schrenkf. raised through film mulching emerged 2-4 d earlier, and the yield increased by 56.8% and 21.71%, respectively, and the individual quality was excellent. [Conclusions] The film mulching of F. przewalskii Maxim. and F. pallidiflora Schrenkf. has great significance to protect the wild resources of Fritillaria in Eryin Mountain Area. It is recommended to adopt the film mulching method for Fritillaria seedling raising, to reduce the yield decline due to lodging, and adopt sun-shading net covering after sowing.
