A novel hydroxy late-rich functionalized biosorbent by grafting citric acid on the decrystallized Dicranopteris dichotoma stem(DDS) was prepared.The obtained g-DDS-3 exhibits good hydrophilicity,thermal stability and ...A novel hydroxy late-rich functionalized biosorbent by grafting citric acid on the decrystallized Dicranopteris dichotoma stem(DDS) was prepared.The obtained g-DDS-3 exhibits good hydrophilicity,thermal stability and superior adsorption performance for Ce^(3+).The effects of citric acid dosage,pH and initial Ce^(3+)concentration on the adsorption experiments were investigated.The maximum adsorption capacity(Langmuir model) of Ce^(3+)by g-DDS-3 is 131.0 mg/g at pH of 7.0,which surpasses that of most previously reported biomass-based materials.Adsorption kinetic results indicate that the adsorption process conforms to the pseudo-second-order model and can achieve equilibrium quickly.By analyzing the adsorption mechanism,we find that carboxyl groups are uniformly distributed on the surface of g-DDS-3 post modification,which provides abundant adsorption sites,and the adsorption is primarily driven by the ion exchange between Ce^(3+)and carboxyl groups protons.In addition,the adsorption-desorption experiments suggest that the g-DDS-3 has excellent recyclability since the adsorption capacity still remain above 90% after five cycles.These findings prove that carboxylate-rich modified D.dichotoma has great potential for application in the effective separation and recovery of Ce^(3+)from leaching tailings.展开更多
More than half of the world's population relies on the traditional medicine and major role of the traditional medicine including the use of plant extract and their active constituents.Among them,Cordia dichotoma F...More than half of the world's population relies on the traditional medicine and major role of the traditional medicine including the use of plant extract and their active constituents.Among them,Cordia dichotoma Forst.,a small to moderate size plant of family Boragenaceae.commonly called bhokar,lasura,gonda,Indian cherry and shlesmataka.Plant parts such as leaves,fruit,bark and seed have been reported for possessing antidiabetic,antiulcer,anti-inflammatory,immune-modulator and analgesic activity.Screening of fruit,leaves and seed shows the presence of pyrrolizidine alkaloids,coumarins,flavonoids,saponins,lerpenes and sterols.Present review focuses on details of geographical distribution,physicochemical parameters,phytoconstituents and pharmacological properties of Cordia dichotoma reported so far.展开更多
Two new β-carboline-type alkaloids, dichotomine K （1） and dichotomine L （2）, were isolated from the roots of Chinese medicinal plant Stellaria dichotoma L. vat. lanceolata Bge. Structures of 1 and 2 were determin...Two new β-carboline-type alkaloids, dichotomine K （1） and dichotomine L （2）, were isolated from the roots of Chinese medicinal plant Stellaria dichotoma L. vat. lanceolata Bge. Structures of 1 and 2 were determined on the basis of chemical and spectroscopic means.展开更多
In order to investigate the distribution of rare earth elements （REEs） in the natural hyperaccumulator fern Dicranopteris dichotoma Bernh. and to characterize this plant photosynthetically, concentrations of REEs in...In order to investigate the distribution of rare earth elements （REEs） in the natural hyperaccumulator fern Dicranopteris dichotoma Bernh. and to characterize this plant photosynthetically, concentrations of REEs in D. dichotoma from mines mining heavy and light REEs （HREEs and LREEs, respectively）, as well as in D. dichotoma from an area in which no mining occurred, in southern Jiangxi Province were determined using inductively coupled plasma-mass spectrometry. The REE concentrations in the lamina of D. dichotoma were in the order LREEs mine 〉 HREEs mine 〉 non-mining area. The maximum REE content in the lamina of D. dichotoma from the LREE mine was approximately 2 648 mg/kg dry weight. The photosynthetic activity of D. dichotoma from areas of HREE and LREE mines was improved by the presence of high concentrations of REEs in the lamina compared with D. dichotoma from the non-mining area. However, this enhancement varied according to the concentrations of the REEs, as well as their type. In addition, 77K fluorescence, electron transport rate, and chlorophyll-protein complex studies showed that the enhancement of the photosynthetic activity of D. dichotoma from HREE mines was mainly due to an increase in the chlorophyll-protein complex of the reaction center of photosystem （PS） Ⅰ, whereas the enhancement observed in D. dichotoma from LREE mines was due to an increase in the internal antennae chlorophyll-protein complex of PS Ⅱ and greater light energy distribution to the light-harvesting chlorophyll-protein complex of PS Ⅱ.展开更多
在双叉犀金龟人工饲养过程中,连续2年出现了的拟寄生现象,对拟寄生的寄主种类进行鉴定。形态鉴定:寄主的幼虫、蛹和成虫均符合蛆症异蚤蝇(Megaselia scalaris)的形态特征;DNA条形码鉴定:扩增的842 bp碱基含量分别为A:29.6%,T:37.9%,G:16...在双叉犀金龟人工饲养过程中,连续2年出现了的拟寄生现象,对拟寄生的寄主种类进行鉴定。形态鉴定:寄主的幼虫、蛹和成虫均符合蛆症异蚤蝇(Megaselia scalaris)的形态特征;DNA条形码鉴定:扩增的842 bp碱基含量分别为A:29.6%,T:37.9%,G:16.2%,C:16.3%,A+T:67.5%,DNA碱基序列与BOLD(The Barcode of Life Data system)中收录蛆症异蚤蝇的序列相似度为100%,BOLD库中结果有20个序列推荐支持。综合形态和DNA条形码的鉴定结果,确定拟寄生种类为蛆症异蚤蝇(Megaselia scalaris)。双叉犀金龟拟寄生蚤蝇的鉴定为鞘翅目的生物防治提供了新证据。展开更多
基金Project supported by the National Key R&D Program of China (2021YFC2901500)National Natural Science Foundation of China(22208349)+1 种基金Shandong Provincial Natural Science Youth Fund (ZR2022QB244)Shandong Energy Institute Innovation Fund (SEII202107, SEII202133)。
文摘A novel hydroxy late-rich functionalized biosorbent by grafting citric acid on the decrystallized Dicranopteris dichotoma stem(DDS) was prepared.The obtained g-DDS-3 exhibits good hydrophilicity,thermal stability and superior adsorption performance for Ce^(3+).The effects of citric acid dosage,pH and initial Ce^(3+)concentration on the adsorption experiments were investigated.The maximum adsorption capacity(Langmuir model) of Ce^(3+)by g-DDS-3 is 131.0 mg/g at pH of 7.0,which surpasses that of most previously reported biomass-based materials.Adsorption kinetic results indicate that the adsorption process conforms to the pseudo-second-order model and can achieve equilibrium quickly.By analyzing the adsorption mechanism,we find that carboxyl groups are uniformly distributed on the surface of g-DDS-3 post modification,which provides abundant adsorption sites,and the adsorption is primarily driven by the ion exchange between Ce^(3+)and carboxyl groups protons.In addition,the adsorption-desorption experiments suggest that the g-DDS-3 has excellent recyclability since the adsorption capacity still remain above 90% after five cycles.These findings prove that carboxylate-rich modified D.dichotoma has great potential for application in the effective separation and recovery of Ce^(3+)from leaching tailings.
文摘More than half of the world's population relies on the traditional medicine and major role of the traditional medicine including the use of plant extract and their active constituents.Among them,Cordia dichotoma Forst.,a small to moderate size plant of family Boragenaceae.commonly called bhokar,lasura,gonda,Indian cherry and shlesmataka.Plant parts such as leaves,fruit,bark and seed have been reported for possessing antidiabetic,antiulcer,anti-inflammatory,immune-modulator and analgesic activity.Screening of fruit,leaves and seed shows the presence of pyrrolizidine alkaloids,coumarins,flavonoids,saponins,lerpenes and sterols.Present review focuses on details of geographical distribution,physicochemical parameters,phytoconstituents and pharmacological properties of Cordia dichotoma reported so far.
基金supported by the National Natural Science Foundation of China(No.81073009)Program for Changjiang Scholars and Innovative Research Team in University(No.PCSIRT-IRT1193)
文摘Two new β-carboline-type alkaloids, dichotomine K （1） and dichotomine L （2）, were isolated from the roots of Chinese medicinal plant Stellaria dichotoma L. vat. lanceolata Bge. Structures of 1 and 2 were determined on the basis of chemical and spectroscopic means.
文摘In order to investigate the distribution of rare earth elements （REEs） in the natural hyperaccumulator fern Dicranopteris dichotoma Bernh. and to characterize this plant photosynthetically, concentrations of REEs in D. dichotoma from mines mining heavy and light REEs （HREEs and LREEs, respectively）, as well as in D. dichotoma from an area in which no mining occurred, in southern Jiangxi Province were determined using inductively coupled plasma-mass spectrometry. The REE concentrations in the lamina of D. dichotoma were in the order LREEs mine 〉 HREEs mine 〉 non-mining area. The maximum REE content in the lamina of D. dichotoma from the LREE mine was approximately 2 648 mg/kg dry weight. The photosynthetic activity of D. dichotoma from areas of HREE and LREE mines was improved by the presence of high concentrations of REEs in the lamina compared with D. dichotoma from the non-mining area. However, this enhancement varied according to the concentrations of the REEs, as well as their type. In addition, 77K fluorescence, electron transport rate, and chlorophyll-protein complex studies showed that the enhancement of the photosynthetic activity of D. dichotoma from HREE mines was mainly due to an increase in the chlorophyll-protein complex of the reaction center of photosystem （PS） Ⅰ, whereas the enhancement observed in D. dichotoma from LREE mines was due to an increase in the internal antennae chlorophyll-protein complex of PS Ⅱ and greater light energy distribution to the light-harvesting chlorophyll-protein complex of PS Ⅱ.
文摘在双叉犀金龟人工饲养过程中,连续2年出现了的拟寄生现象,对拟寄生的寄主种类进行鉴定。形态鉴定:寄主的幼虫、蛹和成虫均符合蛆症异蚤蝇(Megaselia scalaris)的形态特征;DNA条形码鉴定:扩增的842 bp碱基含量分别为A:29.6%,T:37.9%,G:16.2%,C:16.3%,A+T:67.5%,DNA碱基序列与BOLD(The Barcode of Life Data system)中收录蛆症异蚤蝇的序列相似度为100%,BOLD库中结果有20个序列推荐支持。综合形态和DNA条形码的鉴定结果,确定拟寄生种类为蛆症异蚤蝇(Megaselia scalaris)。双叉犀金龟拟寄生蚤蝇的鉴定为鞘翅目的生物防治提供了新证据。
