[Objective] This study was to reveal the anatomic structure of Premna microphylla Turcz.stem and leaf.[Method] Using plant anatomy method,we performed anatomic analysis of Premna microphylla Turcz.stem and leaf.[Resul...[Objective] This study was to reveal the anatomic structure of Premna microphylla Turcz.stem and leaf.[Method] Using plant anatomy method,we performed anatomic analysis of Premna microphylla Turcz.stem and leaf.[Result] The stem of Premna microphylla Turcz.is axially symmetric organ,its primary structure consists of three parts of epidermis,cortex and vascular cylinder.The petiole consists of epidermis,cortex and vascular cylinder,of which epidermis is a layer of cells with cuticle and epidermal hair.The sun leaf in Premna microphylla is dorsi-ventral leaf,wich is consist of palisade tissue and spongy tissue;while its shade leaf of Premna microphylla almost are isobilateral leaf.[Conclusion] Our results provided reference for further the exploitation and utilization of Premna microphylla Turcz.resources.展开更多
Phytochemical investigation of the leaves of Premna microphylla Turcz led to the isolation of 13 known compounds. Based on spectroscopic and chemical evidences, their structures were identified as diosmetin (1), blu...Phytochemical investigation of the leaves of Premna microphylla Turcz led to the isolation of 13 known compounds. Based on spectroscopic and chemical evidences, their structures were identified as diosmetin (1), blumenol A (2), (3S,5R,6S,7E,9R)-5,6-epoxy-3,9-dihydroxy-7-megastigmene (3), 3β-hydroxy-5a,6a-epoxy-γ-megastigmen-9-one (4), ixerol B (5), (-)-dehydrovomifoliol (6), 3S,5R-dihydroxy-6S,7-megastigmadien-9-one (7), loliotide (8), (+)-dehydrololiolide (9), (+)-medioresinol (10), 4-oxopinoresinol (11), tormentic acid (12), and indole-3-carboxylic acid (13). Compounds 2-13 described above were isolated from this genus for the first time.展开更多
In order to find suspension culture conditions suitable for Premna microphylla Turea, with the leaves of experimented P. microphylla as a material, em- bryogenic callus induction, subculture, dispersion of embryogenic...In order to find suspension culture conditions suitable for Premna microphylla Turea, with the leaves of experimented P. microphylla as a material, em- bryogenic callus induction, subculture, dispersion of embryogenic callus and suspension culture were performed. The results showed that the calli induced from leaves were different. The medium most suitable for induction of loose embryogenic callus for suspension culture was MS + 0.4 mg/L 2,4-D + 0.4 mg/L NAA + 3% sucrose +0.8% agar. A better cell line could be obtained with cellulase and pectinase for dispersion of P. microphyUa callus. The medium most suitable for sus- pension culture was MS +0.4 mg/L 2,4-D +0.8 mg/L KT +3% sucrose. In this medium, the fresh weight of the suspensian-cultured cells increased by 6.46 times per 7 d. Dark culture was more suitable for cell proliferation. The average contents of pectin and protein were, respectively, 6.57% and 0.12% in the sus- pended ceils of P. microphylla, which had been cultured for 3 weeks under the optimum culture conditions.展开更多
Nutritional components in leaves of Premna microphylla Turcz. were analyzed. Compared with the major crops and forages in China, its nutritional value was evaluated. The contents of crude protein and total amino a...Nutritional components in leaves of Premna microphylla Turcz. were analyzed. Compared with the major crops and forages in China, its nutritional value was evaluated. The contents of crude protein and total amino acid in leaves of P. microphylla were 134.8 and 108.1 mg/g respectively. It was rich in contents of Vc (3.6 mg/g), βcarotene (0.2 mg/g) and mineral elements. So this species is a wild plant resources which can be utilized widely.展开更多
研究了酸解法从豆腐柴叶中提取果胶的动力学过程,建立了受溶解果胶分子降解影响的果胶提取动力学模型,并用数学方法确定了最大的得率和最佳的提取时间。模型可应用于描述在实验室条件下,60、70、80和90℃时用盐酸从豆腐柴叶中提取果胶...研究了酸解法从豆腐柴叶中提取果胶的动力学过程,建立了受溶解果胶分子降解影响的果胶提取动力学模型,并用数学方法确定了最大的得率和最佳的提取时间。模型可应用于描述在实验室条件下,60、70、80和90℃时用盐酸从豆腐柴叶中提取果胶的酸提取过程,确立了提取过程的速率常数,从60℃下的3.01×10-4s-1变化到90℃下的8.64×10-4s-1,应用该模型对豆腐柴叶果胶的提取得率进行了理论计算,获得了90℃下最佳提取时间(50.19 m in)时的最大得率(8.007%),模型计算结果与实验数据吻合较好。所提出的理论模型能充分描述在酸性条件下的果胶提取过程和预测果胶的最大得率、果胶降解量和最佳的提取时间。展开更多
基金Supported by the Supporting Program of the"Eleventh Five-year Plan"for Sci&Tech Research of China(2007BAD87B06)Major Fund of Anhui Province Education Department(KJ2010A114)~~
文摘[Objective] This study was to reveal the anatomic structure of Premna microphylla Turcz.stem and leaf.[Method] Using plant anatomy method,we performed anatomic analysis of Premna microphylla Turcz.stem and leaf.[Result] The stem of Premna microphylla Turcz.is axially symmetric organ,its primary structure consists of three parts of epidermis,cortex and vascular cylinder.The petiole consists of epidermis,cortex and vascular cylinder,of which epidermis is a layer of cells with cuticle and epidermal hair.The sun leaf in Premna microphylla is dorsi-ventral leaf,wich is consist of palisade tissue and spongy tissue;while its shade leaf of Premna microphylla almost are isobilateral leaf.[Conclusion] Our results provided reference for further the exploitation and utilization of Premna microphylla Turcz.resources.
基金National Natural Science Foundation of China(Grant No.31270390)Program for New Century Excellent Talents in University(Grant No.NCET-08-0224)
文摘Phytochemical investigation of the leaves of Premna microphylla Turcz led to the isolation of 13 known compounds. Based on spectroscopic and chemical evidences, their structures were identified as diosmetin (1), blumenol A (2), (3S,5R,6S,7E,9R)-5,6-epoxy-3,9-dihydroxy-7-megastigmene (3), 3β-hydroxy-5a,6a-epoxy-γ-megastigmen-9-one (4), ixerol B (5), (-)-dehydrovomifoliol (6), 3S,5R-dihydroxy-6S,7-megastigmadien-9-one (7), loliotide (8), (+)-dehydrololiolide (9), (+)-medioresinol (10), 4-oxopinoresinol (11), tormentic acid (12), and indole-3-carboxylic acid (13). Compounds 2-13 described above were isolated from this genus for the first time.
基金Supported by Nature Science Foundation of Hubei Province(2008CDZ085)
文摘In order to find suspension culture conditions suitable for Premna microphylla Turea, with the leaves of experimented P. microphylla as a material, em- bryogenic callus induction, subculture, dispersion of embryogenic callus and suspension culture were performed. The results showed that the calli induced from leaves were different. The medium most suitable for induction of loose embryogenic callus for suspension culture was MS + 0.4 mg/L 2,4-D + 0.4 mg/L NAA + 3% sucrose +0.8% agar. A better cell line could be obtained with cellulase and pectinase for dispersion of P. microphyUa callus. The medium most suitable for sus- pension culture was MS +0.4 mg/L 2,4-D +0.8 mg/L KT +3% sucrose. In this medium, the fresh weight of the suspensian-cultured cells increased by 6.46 times per 7 d. Dark culture was more suitable for cell proliferation. The average contents of pectin and protein were, respectively, 6.57% and 0.12% in the sus- pended ceils of P. microphylla, which had been cultured for 3 weeks under the optimum culture conditions.
文摘Nutritional components in leaves of Premna microphylla Turcz. were analyzed. Compared with the major crops and forages in China, its nutritional value was evaluated. The contents of crude protein and total amino acid in leaves of P. microphylla were 134.8 and 108.1 mg/g respectively. It was rich in contents of Vc (3.6 mg/g), βcarotene (0.2 mg/g) and mineral elements. So this species is a wild plant resources which can be utilized widely.
文摘研究了酸解法从豆腐柴叶中提取果胶的动力学过程,建立了受溶解果胶分子降解影响的果胶提取动力学模型,并用数学方法确定了最大的得率和最佳的提取时间。模型可应用于描述在实验室条件下,60、70、80和90℃时用盐酸从豆腐柴叶中提取果胶的酸提取过程,确立了提取过程的速率常数,从60℃下的3.01×10-4s-1变化到90℃下的8.64×10-4s-1,应用该模型对豆腐柴叶果胶的提取得率进行了理论计算,获得了90℃下最佳提取时间(50.19 m in)时的最大得率(8.007%),模型计算结果与实验数据吻合较好。所提出的理论模型能充分描述在酸性条件下的果胶提取过程和预测果胶的最大得率、果胶降解量和最佳的提取时间。