The active compounds in herb drugs are mainly secondary metabolites, which are greatly influenced by external conditions. Particularly, light intensity has a great influence on the photosynthesis and accumulation of s...The active compounds in herb drugs are mainly secondary metabolites, which are greatly influenced by external conditions. Particularly, light intensity has a great influence on the photosynthesis and accumulation of secondary metabolites. In this study, the light intensity was changed, and the influence of the light intensity on leaf photosynthetic characteristics, antioxidant enzyme activity and flavone contents of Lithocarpus litseifoliusp (Hance) Chun. was discussed. The results showed that (1) L. litseifolius is a typical heliophyte. As the light intensity decreased, the contents of chlorophyll a (Chl a), chlorophyll b (Chl b) and total chlorophyll (Chl a + b) all increased. However, the Chl a/b ratio gradually decreased. The daily variation of net photosynthetic rate changed from a double-peak curve under natural light to single-peak curve under 20% full light two shading nets. (2) As the light intensity decreased, the SOD and POD activities and the soluble proteins content decreased in the leaves. In contrast, the malondialdehyde content increased. (3) The flavone content was the highest in leaves at one shading nets 60% of full light, and the lowest occurred in leaves at two shading nets 20% of full light. A comprehensive analysis indicated that an appropriate shading could induce shade tolerance in the leaves of L. litseifolius, which promoted the accumulation of flavonoids. L. litseifolius should be planted in the lower position of sunny slope or the upper position of shady slope to increase the content of flavone in the leaves.展开更多
紫斑牡丹品种群是中国的主要牡丹品种群之一。文中描述了一个优良紫斑牡丹品种‘挽春’(Paeoniarockii‘W an Chun’)的特征、习性和表现,该品种在紫斑牡丹品种群中具有代表性。紫斑牡丹品种可用于园艺观赏、经济林营造、荒山绿化以及...紫斑牡丹品种群是中国的主要牡丹品种群之一。文中描述了一个优良紫斑牡丹品种‘挽春’(Paeoniarockii‘W an Chun’)的特征、习性和表现,该品种在紫斑牡丹品种群中具有代表性。紫斑牡丹品种可用于园艺观赏、经济林营造、荒山绿化以及荒漠治理。根据多年的调查和相关文献,按照紫斑牡丹品种的生长适应程度和引种栽培难易程度,将中国有可能引种栽植紫斑牡丹品种的地区划分为4类。介绍了各类地区在引种栽培方面需要注意的关键技术措施,分析了紫斑牡丹品种向全国各地推广过程中存在的问题,并提出了建议。展开更多
A novel phenylpropanoid glycoside, Callicarposide A has been isolated from the aerial parts of Callicarpa kwangtungensis Chun. The chemical structure is elucidated on the basis of spectral analysis. C 2009 Teng Fei Ji...A novel phenylpropanoid glycoside, Callicarposide A has been isolated from the aerial parts of Callicarpa kwangtungensis Chun. The chemical structure is elucidated on the basis of spectral analysis. C 2009 Teng Fei Ji. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.展开更多
Chun Xiao, a famous Tang poetry, written by Meng Haoran, has been translated by some great translators. In translating poems, what is important is not only the transferring of the intended meaning of the source langua...Chun Xiao, a famous Tang poetry, written by Meng Haoran, has been translated by some great translators. In translating poems, what is important is not only the transferring of the intended meaning of the source language into target language, but keeping its literariness, i.e. the style of the original text. Three English versions are selected to make a comparative study from the perspective of reception aesthetics in terms of lexicon, rhyme and syntax.展开更多
Chunyu Yi(215 _(BC)-150 _(BC))once served as an official of granary in the Qi State.So he had a nickname of granary chief.His ancestral home was Linzi(present Linzi,Shandong Province).He was a celebrated practitioner ...Chunyu Yi(215 _(BC)-150 _(BC))once served as an official of granary in the Qi State.So he had a nickname of granary chief.His ancestral home was Linzi(present Linzi,Shandong Province).He was a celebrated practitioner of the Western Han Dynasty.His 25 case records,the extant earliest ones in China,were listed in The His-torical Records(Shi Ji).展开更多
The art of Wing Chun transcends geographical boundaries and cultural differences,with an impressive number of over 10 million practitioners spread across more than 80 countries and regions.This remarkable global reach...The art of Wing Chun transcends geographical boundaries and cultural differences,with an impressive number of over 10 million practitioners spread across more than 80 countries and regions.This remarkable global reach serves as a testament to its captivating allure and unparalleled ability to forge connections among individuals from diverse backgrounds.展开更多
Ancient poetry is an irreplaceable component of Chinese culture and an invaluable asset in China’s cultural heritage.With the rapid development of globalization and informatization,Chinese poem is attracting more and...Ancient poetry is an irreplaceable component of Chinese culture and an invaluable asset in China’s cultural heritage.With the rapid development of globalization and informatization,Chinese poem is attracting more and more interests and focuses as one part of China’s cultural soft power which plays an important role on spreading traditional Chinese culture.Systemic functional linguistics mainly explores the essence,entailment,system and structure of language from the perspective of social culture,especially the relationship between context and discourse.Therefore,the paper applies the register theory to Chinese poem translations of Xu Yuanchong and Yang Xianyi of“Chun Ye Xi Yu”in order to compare two translated texts from three aspects of field,tenor,and mode,and examine the expression of the connotation of the original poem between the two translations.展开更多
为进一步明确石碌含笑(Michelia shiluensis Chun et Y.F.Wu)的濒危原因,连续3年对海南吊罗山国家森林公园野生石碌含笑种群的生存现状进行调查,同时对海南天香木兰植物保育研究中心栽培石碌含笑的生长特性进行统计分析,并对栽培和野生...为进一步明确石碌含笑(Michelia shiluensis Chun et Y.F.Wu)的濒危原因,连续3年对海南吊罗山国家森林公园野生石碌含笑种群的生存现状进行调查,同时对海南天香木兰植物保育研究中心栽培石碌含笑的生长特性进行统计分析,并对栽培和野生石碌含笑进行比较。结果表明:该野生石碌含笑种群共有296株个体,但开花植株仅占个体总数的7.1%,占成年(胸径在22.5 cm及以上)个体数的44.7%;开花和结实植株最小株距的中值分别为17.07和2.56 m,且罕见幼苗;生境遮光率均在96%以上。85%以上土壤的有机质、全氮、全钾及碱解氮含量在较丰富及以上水平,2/3以上土壤的速效钾含量在适量或较丰富水平,所有土壤的全磷含量在贫乏或极贫乏水平,半数以上土壤的有效磷含量在贫乏或极贫乏水平。野生石碌含笑生长较慢,株龄5 a的野生植株的平均株高与株龄2 a的栽培植株相近。经推算,野生和栽培石碌含笑的童期分别为20.3和10.8 a。观察结果显示:石碌含笑在花蕾形成期经过高温干旱天气后植株的开花物候期明显延迟,小孢子败育严重,花粉量急剧减少甚至无花粉。在遮光率90%处理下石碌含笑的净光合速率最高,株高增长量最大;而在遮光率99%处理下石碌含笑的净光合速率最低,株高和地径增长量最小。综合分析认为,海南吊罗山石碌含笑的濒危原因主要为外因,即碎片化生境导致植株花而不实,林下光照不足导致幼苗生长缓慢甚至死亡,种群更新困难。因此,石碌含笑是个被严重低估的濒危树种。展开更多
文摘The active compounds in herb drugs are mainly secondary metabolites, which are greatly influenced by external conditions. Particularly, light intensity has a great influence on the photosynthesis and accumulation of secondary metabolites. In this study, the light intensity was changed, and the influence of the light intensity on leaf photosynthetic characteristics, antioxidant enzyme activity and flavone contents of Lithocarpus litseifoliusp (Hance) Chun. was discussed. The results showed that (1) L. litseifolius is a typical heliophyte. As the light intensity decreased, the contents of chlorophyll a (Chl a), chlorophyll b (Chl b) and total chlorophyll (Chl a + b) all increased. However, the Chl a/b ratio gradually decreased. The daily variation of net photosynthetic rate changed from a double-peak curve under natural light to single-peak curve under 20% full light two shading nets. (2) As the light intensity decreased, the SOD and POD activities and the soluble proteins content decreased in the leaves. In contrast, the malondialdehyde content increased. (3) The flavone content was the highest in leaves at one shading nets 60% of full light, and the lowest occurred in leaves at two shading nets 20% of full light. A comprehensive analysis indicated that an appropriate shading could induce shade tolerance in the leaves of L. litseifolius, which promoted the accumulation of flavonoids. L. litseifolius should be planted in the lower position of sunny slope or the upper position of shady slope to increase the content of flavone in the leaves.
文摘紫斑牡丹品种群是中国的主要牡丹品种群之一。文中描述了一个优良紫斑牡丹品种‘挽春’(Paeoniarockii‘W an Chun’)的特征、习性和表现,该品种在紫斑牡丹品种群中具有代表性。紫斑牡丹品种可用于园艺观赏、经济林营造、荒山绿化以及荒漠治理。根据多年的调查和相关文献,按照紫斑牡丹品种的生长适应程度和引种栽培难易程度,将中国有可能引种栽植紫斑牡丹品种的地区划分为4类。介绍了各类地区在引种栽培方面需要注意的关键技术措施,分析了紫斑牡丹品种向全国各地推广过程中存在的问题,并提出了建议。
文摘A novel phenylpropanoid glycoside, Callicarposide A has been isolated from the aerial parts of Callicarpa kwangtungensis Chun. The chemical structure is elucidated on the basis of spectral analysis. C 2009 Teng Fei Ji. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
文摘Chun Xiao, a famous Tang poetry, written by Meng Haoran, has been translated by some great translators. In translating poems, what is important is not only the transferring of the intended meaning of the source language into target language, but keeping its literariness, i.e. the style of the original text. Three English versions are selected to make a comparative study from the perspective of reception aesthetics in terms of lexicon, rhyme and syntax.
文摘Chunyu Yi(215 _(BC)-150 _(BC))once served as an official of granary in the Qi State.So he had a nickname of granary chief.His ancestral home was Linzi(present Linzi,Shandong Province).He was a celebrated practitioner of the Western Han Dynasty.His 25 case records,the extant earliest ones in China,were listed in The His-torical Records(Shi Ji).
文摘The art of Wing Chun transcends geographical boundaries and cultural differences,with an impressive number of over 10 million practitioners spread across more than 80 countries and regions.This remarkable global reach serves as a testament to its captivating allure and unparalleled ability to forge connections among individuals from diverse backgrounds.
文摘Ancient poetry is an irreplaceable component of Chinese culture and an invaluable asset in China’s cultural heritage.With the rapid development of globalization and informatization,Chinese poem is attracting more and more interests and focuses as one part of China’s cultural soft power which plays an important role on spreading traditional Chinese culture.Systemic functional linguistics mainly explores the essence,entailment,system and structure of language from the perspective of social culture,especially the relationship between context and discourse.Therefore,the paper applies the register theory to Chinese poem translations of Xu Yuanchong and Yang Xianyi of“Chun Ye Xi Yu”in order to compare two translated texts from three aspects of field,tenor,and mode,and examine the expression of the connotation of the original poem between the two translations.
文摘为进一步明确石碌含笑(Michelia shiluensis Chun et Y.F.Wu)的濒危原因,连续3年对海南吊罗山国家森林公园野生石碌含笑种群的生存现状进行调查,同时对海南天香木兰植物保育研究中心栽培石碌含笑的生长特性进行统计分析,并对栽培和野生石碌含笑进行比较。结果表明:该野生石碌含笑种群共有296株个体,但开花植株仅占个体总数的7.1%,占成年(胸径在22.5 cm及以上)个体数的44.7%;开花和结实植株最小株距的中值分别为17.07和2.56 m,且罕见幼苗;生境遮光率均在96%以上。85%以上土壤的有机质、全氮、全钾及碱解氮含量在较丰富及以上水平,2/3以上土壤的速效钾含量在适量或较丰富水平,所有土壤的全磷含量在贫乏或极贫乏水平,半数以上土壤的有效磷含量在贫乏或极贫乏水平。野生石碌含笑生长较慢,株龄5 a的野生植株的平均株高与株龄2 a的栽培植株相近。经推算,野生和栽培石碌含笑的童期分别为20.3和10.8 a。观察结果显示:石碌含笑在花蕾形成期经过高温干旱天气后植株的开花物候期明显延迟,小孢子败育严重,花粉量急剧减少甚至无花粉。在遮光率90%处理下石碌含笑的净光合速率最高,株高增长量最大;而在遮光率99%处理下石碌含笑的净光合速率最低,株高和地径增长量最小。综合分析认为,海南吊罗山石碌含笑的濒危原因主要为外因,即碎片化生境导致植株花而不实,林下光照不足导致幼苗生长缓慢甚至死亡,种群更新困难。因此,石碌含笑是个被严重低估的濒危树种。
