The Experts below are selected from a list of 291 Experts worldwide ranked by ideXlab platform
Yehua Shen - One of the best experts on this subject based on the ideXlab platform.
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characterisation physicochemical and functional properties of protein isolates from amygdalus Pedunculata pall seeds
Food Chemistry, 2020Co-Authors: Cong Li, Juzhuan Yang, Bang Chen, Jianjun Deng, Yehua ShenAbstract:Abstract Amygdalus Pedunculata Pall is a kind of desert woody oil plant, and its seeds are high in protein. The protein of Amygdalus Pedunculata Pall (API) was identified by SDS-PAGE, 2-DE and MS. More than 300 proteins were identified. The improved solubility, emulsifying properties and foaming properties of API were observed in a pH range of 2.0–12.0 and a sodium chloride concentration of 0–1.0 M. The results showed that API had a good solubility (94.2%), bulk density (0.107 g/mL), oil absorption capacity (3.54 g/g), thermal stability (91.58 °C), emulsifying property (70 m2/g) and foaming property (83.7%). The conformation changes of API were studied by fluorescence and differential scanning calorimetry (DSC). The degree of denaturation of denaturants for API was guanidine hydrochloride > urea > SDS. These results showed that API has good processing performance and can be used as a new type of plant protein resource.
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characterization of the complete chloroplast genomes of the endangered shrub species prunus mongolica and prunus Pedunculata rosales rosaceae
Conservation Genetics Resources, 2019Co-Authors: Yizhong Duan, Yehua Shen, Furen Kang, Jianwu WangAbstract:Prunus mongolica and Prunus Pedunculata are two shrub species with high ecological and economic values, and have experienced population decline and range contraction during the past decades. To promote their conservation and restoration, complete chloroplast (cp) genomes were assembled using next-generation sequencing technology in this study. The cp genomes of P. mongolica and P. Pedunculata were 158,039 and 157,851 bp in length, respectively, and both comprise a pair of inverted repeat regions, separated by a large single-copy region and a small single-copy region. A total of 111 gene species were annotated for both species, including 78 protein-coding (PCG), 29 tRNA and four rRNA gene species; nineteen gene species are completely or partially duplicated within the IR regions. P. mongolica was found to be closely related to the congeners P. kansuensis and P. persica, while P. Pedunculata to P. humilis and P. mume.
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purification and characterization of a hydroxynitrile lyase from amygdalus Pedunculata pall
International Journal of Biological Macromolecules, 2018Co-Authors: Haoyu Li, Juzhuan Yang, Cong Li, Yehua ShenAbstract:Abstract Hydroxynitrile lyases (HNLs) are widely used in the asymmetric synthesis of cyanohydrins which are organic compounds used in the production of fine chemicals and pharmaceuticals, because these enzymes exhibit high catalytic efficiency and are very economical. In the present study, seeds of A. Pedunculata Pall were identified as new potential source of HNLs. The HNL from A. Pedunculata Pall (APHNL) was purified 138 fold and 4.20% yield with a specific activity of 661 U/mg. SDS-PAGE result showed the enzyme to be present as a monomer and the relative molecular mass determined by MALDI-TOF MS was 61 kDa. APHNL owned highest activity at pH 6.0 and at 60 °C temperature, showing activity up to 80 °C and stable up to 60 °C. APHNL has a Km of 0.5 mM, Vmax of 665.9 μmol mg−1 min−1, Kcat of 676.5 s−1 and Kcat/Km of 1353 s−1 mM−1 using mandelonitrile as substrate. Syntheses of (R)-mandelonitrile and (R)-2-Hydroxy-2-(3-phenoxy-phenyl)-acetonitrile were carried out using APHNL and molar conversion of (R)-mandelonitrile and (R)-2-Hydroxy-2-(3-phenoxy-phenyl)-acetonitrile were 90% and 98% with 94% and 93% ee, respectively. These results indicated that APHNL was an excellent biocatalyst and has very high potential for synthesis of enantiopure cyanohydrins.
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a cellulose acetate amygdalus Pedunculata shell derived activated carbon composite monolith for phenol adsorption
RSC Advances, 2018Co-Authors: Qiancheng Xiong, Yehua Shen, Cong Li, Hiroshi Uyama, Yuanyuan HeAbstract:Amygdalus Pedunculata is expected to be a good candidate plant for desert reclamation (“greening”) since it has notable tolerance to cold and drought and can grow in a wide range of areas with different soil types and moisture contents. In this study, we have developed a single-step method to fabricate a cellulose acetate (CA)/A. Pedunculata shell (APS)-derived activated carbon (AC) composite monolith by thermally induced phase separation (TIPS) for removal of toxic phenol from aqueous solution. The composite monolith was easily fabricated by TIPS of a CA solution in the presence of the dispersed AC, in which AC was well loaded onto the monolithic skeleton of CA. The as-obtained monolith showed a maximum adsorption capacity of 45 mg g−1 at the initial phenol concentration of 0.8 mg mL−1. The present composite can be prepared with an arbitrary shape by a facile method from cheap materials, and is more convenient to recycle than powder adsorbents. Therefore, the present CA/APS-derived AC composite monolith has great potential as a promising adsorbent of low cost with convenient separation for toxic phenol-containing wastewater.
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A cellulose acetate/Amygdalus Pedunculata shell-derived activated carbon composite monolith for phenol adsorption
RSC Advances, 2018Co-Authors: Qiancheng Xiong, Yehua Shen, Cong Li, Yuanyuan He, Hiroshi UyamaAbstract:Amygdalus Pedunculata is expected to be a good candidate plant for desert reclamation (“greening”) since it has notable tolerance to cold and drought and can grow in a wide range of areas with different soil types and moisture contents. In this study, we have developed a single-step method to fabricate a cellulose acetate (CA)/A. Pedunculata shell (APS)-derived activated carbon (AC) composite monolith by thermally induced phase separation (TIPS) for removal of toxic phenol from aqueous solution. The composite monolith was easily fabricated by TIPS of a CA solution in the presence of the dispersed AC, in which AC was well loaded onto the monolithic skeleton of CA. The as-obtained monolith showed a maximum adsorption capacity of 45 mg g−1 at the initial phenol concentration of 0.8 mg mL−1. The present composite can be prepared with an arbitrary shape by a facile method from cheap materials, and is more convenient to recycle than powder adsorbents. Therefore, the present CA/APS-derived AC composite monolith has great potential as a promising adsorbent of low cost with convenient separation for toxic phenol-containing wastewater.
Hiroshi Uyama - One of the best experts on this subject based on the ideXlab platform.
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A cellulose acetate/Amygdalus Pedunculata shell-derived activated carbon composite monolith for phenol adsorption
RSC Advances, 2018Co-Authors: Qiancheng Xiong, Yehua Shen, Cong Li, Yuanyuan He, Hiroshi UyamaAbstract:Amygdalus Pedunculata is expected to be a good candidate plant for desert reclamation (“greening”) since it has notable tolerance to cold and drought and can grow in a wide range of areas with different soil types and moisture contents. In this study, we have developed a single-step method to fabricate a cellulose acetate (CA)/A. Pedunculata shell (APS)-derived activated carbon (AC) composite monolith by thermally induced phase separation (TIPS) for removal of toxic phenol from aqueous solution. The composite monolith was easily fabricated by TIPS of a CA solution in the presence of the dispersed AC, in which AC was well loaded onto the monolithic skeleton of CA. The as-obtained monolith showed a maximum adsorption capacity of 45 mg g−1 at the initial phenol concentration of 0.8 mg mL−1. The present composite can be prepared with an arbitrary shape by a facile method from cheap materials, and is more convenient to recycle than powder adsorbents. Therefore, the present CA/APS-derived AC composite monolith has great potential as a promising adsorbent of low cost with convenient separation for toxic phenol-containing wastewater.
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a cellulose acetate amygdalus Pedunculata shell derived activated carbon composite monolith for phenol adsorption
RSC Advances, 2018Co-Authors: Qiancheng Xiong, Yehua Shen, Cong Li, Hiroshi Uyama, Yuanyuan HeAbstract:Amygdalus Pedunculata is expected to be a good candidate plant for desert reclamation (“greening”) since it has notable tolerance to cold and drought and can grow in a wide range of areas with different soil types and moisture contents. In this study, we have developed a single-step method to fabricate a cellulose acetate (CA)/A. Pedunculata shell (APS)-derived activated carbon (AC) composite monolith by thermally induced phase separation (TIPS) for removal of toxic phenol from aqueous solution. The composite monolith was easily fabricated by TIPS of a CA solution in the presence of the dispersed AC, in which AC was well loaded onto the monolithic skeleton of CA. The as-obtained monolith showed a maximum adsorption capacity of 45 mg g−1 at the initial phenol concentration of 0.8 mg mL−1. The present composite can be prepared with an arbitrary shape by a facile method from cheap materials, and is more convenient to recycle than powder adsorbents. Therefore, the present CA/APS-derived AC composite monolith has great potential as a promising adsorbent of low cost with convenient separation for toxic phenol-containing wastewater.
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activated carbon monolith derived from amygdalus Pedunculata shell and polyacrylonitrile for supercapacitors
Bulletin of the Chemical Society of Japan, 2017Co-Authors: Jun Maruyama, Yehua Shen, Satoshi Iwasaki, Hiroshi UyamaAbstract:Activated carbon monolith (ACM) was obtained from Amygdalus Pedunculata shell (APS) and polyacrylonitrile (PAN) via a template-free approach. APS was uniformly distributed into the monolith matrix and an interconnected network was fully established. The present study greatly promotes the close contact between desert reclamation and green energy storage.
Tian Shung Wu - One of the best experts on this subject based on the ideXlab platform.
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acetophenones isolated from acronychia Pedunculata and their anti proliferative activities
Natural Product Communications, 2016Co-Authors: Takuya Matsui, Tian Shung Wu, Masataka ItoigawaAbstract:: Study of the chemical constituents of Acronychia Pedunculata (L.) Miq. (Rutaceae) stems collected in Taiwan led to the isolation and identification of eight known and three new acetophenones, named acrophenone A (1), B (2), and C (3). Of them, acrovestone (5), acropyrone (6) and acrovestenol (7), which are dimer compounds, strikingly inhibited the proliferation of human leukemia cell lines.
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acetophenones from acronychia Pedunculata and their cancer chemopreventive activity
Natural Product Communications, 2016Co-Authors: Mari Hosono, Tian Shung Wu, Harukuni Tokuda, Masataka ItoigawaAbstract:: From the roots of Acronychia Pedunculata (L.) Miq. (Rutaceae) collected in Taiwan, six known and three new acetophenones have been isolated. The new compounds were named acrophenones D (1), E (2), and F (3). Of the acetophenones isolated in this study, prenylacronylin (4) and acronyculatin D. (10) exhibited significant inhibitory activity against 12-0-tetradecanoylphorbol 13-acetate-induced Epstein-Barr virus early antigen activation in Raji cells.
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acetophenone derivatives from acronychia Pedunculata
Journal of Natural Products, 2003Co-Authors: Chung Ren Su, Meei Ling Wang, Meei Jen Liou, Amooru G Damu, Tian Shung WuAbstract:Chemical investigation on the stem and root bark of Acronychia Pedunculata has resulted in the isolation of five new acetophenones, namely, acronyculatins A (1), B (2), C (3), D (4), and E (5). The structures of these metabolites were established on the basis of their 1D and 2D NMR spectroscopic and mass spectrometric data and by CD spectroscopy. The antioxidant and antityrosinase activities of these five metabolites and acrovestone (6) were evaluated. Among these compounds, 6 showed marginal antioxidant and antityrosinase activities.
Jean-louis Puech - One of the best experts on this subject based on the ideXlab platform.
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Effect of species and ecological conditions on ellagitannin content in oak wood from an even-aged and mixed stand of Quercus robur L. and Quercus petraea Liebl.
Annals of Forest Science, 2006Co-Authors: Andrei Prida, Alexis Ducousso, Jean Claude Boulet, Gérard Nepveu, Jean-louis PuechAbstract:Species effects and ecological conditions on 10 heartwood ellagitannins (vescalin, castalin, roburins A-E, grandinin, vescalagin and castalagin) and ellagic acid were investigated in a 100-year-old oak stand of 5 ha located in western France (La Petite Charnie State Forest, Sarthe). The sample included a total of 286 trees (118 sessile oaks (Quercus petraea), 158 pedunculate oaks (Q. robur) and 10 individuals with an intermediate morphology) located in three ecological zones (plateau, slope and small valley). The main factor influencing oak extractives level was botanical species. The ecological zone effect appeared negligible. Pedunculate oak was generally richer in ellagitannins (48.4 mg/g against 34.4 for sessile oak), although a clear boundary between the two species cannot be established. Ellagitannin content was found to be correlated with ring width for pedunculate oak and not for sessile oak. The vescalagin:castalagin ratios differed between the two species (0.69 for Q. robur against 0.53 for Q. petraea). The distribution of ellagitannin contents was not strongly structured spatially.
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Ellagitannin Content of Oak Wood as a Function of Species and of Sampling Position in the Tree
American Journal of Enology and Viticulture, 1995Co-Authors: G. Masson, Michel Moutounet, Jean-louis PuechAbstract:The eight ellagitannins known to be present in oak wood (castalagin, vescalagin, grandinin, roburins A-E) and castalin and vescalin were characterized in the newly felled wood from several pedunculate and sessile oaks. Determination of these components by HPLC enabled us to establish the qualitative and quantitative potential of each individual tree and of each species. The two species oaks presented a high variability in all components between individual trees. The pedunculate and sessile oaks were not significantly different in their ellagitannin contents. In addition, the distribution of ellagitannins in the wood from pedunculate and sessile oaks was studied as a function of three parameters: sampling height in the trunk; age of the wood; and orientation of the wood in relation to the cardinal points. Each parameter induced variability in ellagitannin content. The age of the wood was found to be important. The effects of height and orientation were not statistically significant. The variations revealed in this study are attributed to two phenomena: aging of the wood, and the different proportions of tissue contained in the wood. The ellagitannin content of the stave wood that the cooper uses to produce barrels is, therefore, strongly influenced by the position of the stave wood in the tree.
Md Ibrahim Khalil - One of the best experts on this subject based on the ideXlab platform.
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assessment of toxicity and beneficiary effects of garcinia Pedunculata on the hematological biochemical and histological homeostasis in rats
Evidence-based Complementary and Alternative Medicine, 2017Co-Authors: Sudip Paul, Nurenoushin Rumpa, E M Tanvir, Md Sakib Hossen, Moumoni Saha, Nikhil Chandra Bhoumik, Md Ibrahim KhalilAbstract:This study was undertaken to investigate the toxicological profile of a methanolic extract of Garcinia Pedunculata fruit in rats by conducting hematological, biochemical, and histopathological examinations. Long Evans rats were divided into four groups, each with 6 animals, and were treated with three oral doses (250, 500, and 1000 mg/kg) once daily for 21 days. The extract did not cause significant changes in body and relative organ weight, percent water content, or hematological parameters at any administered doses. However, a significant dose-dependent positive effect in serum lipid profile and all atherogenic indices including the cardiac risk ratio, Castelli’s risk index-2, and the atherogenic coefficient were observed. Significant increases in the levels of iron and decreases in serum alkaline phosphatase, alanine transaminase, and lactate dehydrogenase activities and the levels of serum glucose were noted when the extract was administered at the highest dose (1000 mg/kg). Histopathological examination of the target tissues further confirmed that the extract was safe and had no observed toxicological features. Our study indicates that G. Pedunculata fruit is nontoxic, has the potential to be effective against atherosclerosis, and may be used as a hepatoprotectant. The fruit extract is also beneficial to those with iron deficiency and hyperglycemia.
