Many structural and functional properties possessed by plants have great potentials to stimulate new concepts and innovative ideas in the field of biomimetic engineering. The key inputs from biology can be used for cr...Many structural and functional properties possessed by plants have great potentials to stimulate new concepts and innovative ideas in the field of biomimetic engineering. The key inputs from biology can be used for creation of efficient and optimized structures. The study of the geometry and folding pattern of leaves of Mimosa pudica, referred as Sensitive Plant, reveals some of the peculiar characteristics during folding and unfolding. When the leaf is touched, it quickly folds its leaflets and pinnae and droops downward at the petiole attachment. With the help of experiments on simulation model, the variations in angle of leaflets and degree of compaction after folding are investigated.展开更多
Two new C-glycosylflavones were isolated from the whole plant of Mimosa pudica, and their structures were determined as 6,7,3＇,4＇-tetrahydroxyl-8-C-[α-L-rhamnopyranosyl-（1 → 2）]-β-D-glucopyranosyl flavone （1）...Two new C-glycosylflavones were isolated from the whole plant of Mimosa pudica, and their structures were determined as 6,7,3＇,4＇-tetrahydroxyl-8-C-[α-L-rhamnopyranosyl-（1 → 2）]-β-D-glucopyranosyl flavone （1）, 5,7,3＇,4＇-tetrahydroxy-8-C[β-D- apiose-（1 → 4）]-β-D-glycopyranosyl flavone （2）. Their structures elucidated by chemical and spectroscopic analysis including IR, MS, 1D and 2D NMR spectra.展开更多
A rapid, sensitive and accurate liquid chroma-tographic tandem mass spectrometric method is described for the determination of Mimosine in Mimosa pudica Linn. whole plant powder. Mi-mosine was extracted from the plant...A rapid, sensitive and accurate liquid chroma-tographic tandem mass spectrometric method is described for the determination of Mimosine in Mimosa pudica Linn. whole plant powder. Mi-mosine was extracted from the plant using 1.0% HCl in water. The chromatographic separation was achieved using a Thermo Hypurity C18 (50 x 4.6 mm) 5.0 μ column interfaced with a triple quadrapole mass spectrometer. The mobile phase consisted of a mixture of Methanol: 10 mM ammonium formate buffer whose pH was ad-justed to 3.00 ± 0.05 with formic acid (80:20, v/v) and was delivered at a flow rate of 1.0 mL min-1. Electrospray ionization (ESI) source operated in the negative ion mode was used for the quantitation. Detection was performed using an Applied Biosystems Sciex API 3200 Mass spec-trometer. The method was found to be simple, precise, accurate, fast, specific and sensitive and can be used for routine quality control analysis of Mimosine in Mimosa pudica Linn.展开更多
目的研究海南含羞草(M im osa pudica)的化学成分。方法利用D iaion HP-20,Toyopearl HW-40,MC I-Gel CHP-20,Sephadex LH-20,RP18及硅胶等柱色谱法对海南含羞草成分进行分离纯化,根据理化性质和光谱数据鉴定化合物的结构。结果分离鉴定...目的研究海南含羞草(M im osa pudica)的化学成分。方法利用D iaion HP-20,Toyopearl HW-40,MC I-Gel CHP-20,Sephadex LH-20,RP18及硅胶等柱色谱法对海南含羞草成分进行分离纯化,根据理化性质和光谱数据鉴定化合物的结构。结果分离鉴定了4个化合物:7,8,3,′4′-四羟基-6-C-[α-L-鼠李糖-(1→2)]-β-D-葡糖黄酮碳苷(I),5,7,4′-三羟基-8-C-[α-L-鼠李糖(1→2)]-β-D-葡糖黄酮碳苷(II),5,7,3,′4′-四羟基-6-C-[α-L-鼠李糖-(1→2)]-β-D-葡糖黄酮碳苷(III),儿茶素(IV)。结论化合物I为新化合物,化合物II^IV为首次从该植物中分离得到。展开更多
文摘Many structural and functional properties possessed by plants have great potentials to stimulate new concepts and innovative ideas in the field of biomimetic engineering. The key inputs from biology can be used for creation of efficient and optimized structures. The study of the geometry and folding pattern of leaves of Mimosa pudica, referred as Sensitive Plant, reveals some of the peculiar characteristics during folding and unfolding. When the leaf is touched, it quickly folds its leaflets and pinnae and droops downward at the petiole attachment. With the help of experiments on simulation model, the variations in angle of leaflets and degree of compaction after folding are investigated.
文摘Two new C-glycosylflavones were isolated from the whole plant of Mimosa pudica, and their structures were determined as 6,7,3＇,4＇-tetrahydroxyl-8-C-[α-L-rhamnopyranosyl-（1 → 2）]-β-D-glucopyranosyl flavone （1）, 5,7,3＇,4＇-tetrahydroxy-8-C[β-D- apiose-（1 → 4）]-β-D-glycopyranosyl flavone （2）. Their structures elucidated by chemical and spectroscopic analysis including IR, MS, 1D and 2D NMR spectra.
文摘A rapid, sensitive and accurate liquid chroma-tographic tandem mass spectrometric method is described for the determination of Mimosine in Mimosa pudica Linn. whole plant powder. Mi-mosine was extracted from the plant using 1.0% HCl in water. The chromatographic separation was achieved using a Thermo Hypurity C18 (50 x 4.6 mm) 5.0 μ column interfaced with a triple quadrapole mass spectrometer. The mobile phase consisted of a mixture of Methanol: 10 mM ammonium formate buffer whose pH was ad-justed to 3.00 ± 0.05 with formic acid (80:20, v/v) and was delivered at a flow rate of 1.0 mL min-1. Electrospray ionization (ESI) source operated in the negative ion mode was used for the quantitation. Detection was performed using an Applied Biosystems Sciex API 3200 Mass spec-trometer. The method was found to be simple, precise, accurate, fast, specific and sensitive and can be used for routine quality control analysis of Mimosine in Mimosa pudica Linn.
文摘目的研究海南含羞草(M im osa pudica)的化学成分。方法利用D iaion HP-20,Toyopearl HW-40,MC I-Gel CHP-20,Sephadex LH-20,RP18及硅胶等柱色谱法对海南含羞草成分进行分离纯化,根据理化性质和光谱数据鉴定化合物的结构。结果分离鉴定了4个化合物:7,8,3,′4′-四羟基-6-C-[α-L-鼠李糖-(1→2)]-β-D-葡糖黄酮碳苷(I),5,7,4′-三羟基-8-C-[α-L-鼠李糖(1→2)]-β-D-葡糖黄酮碳苷(II),5,7,3,′4′-四羟基-6-C-[α-L-鼠李糖-(1→2)]-β-D-葡糖黄酮碳苷(III),儿茶素(IV)。结论化合物I为新化合物,化合物II^IV为首次从该植物中分离得到。
