Publications by authors named "Zhengbo Liu"

36 Publications

Iron toxicity-induced regulation of key secondary metabolic processes associated with the quality and resistance of Panax ginseng and Panax quinquefolius.

Ecotoxicol Environ Saf 2021 Aug 25;224:112648. Epub 2021 Aug 25.

Institute of Special Wild Economic Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Jilin 130112, China; College of Pharmacy and biological Engineering, Chengdu University, Chengdu 610106, China. Electronic address:

Panax ginseng and Panax quinquefolius can survive for long periods of time in iron toxicity-stressed environments, which cause rusty roots and reduced productivity. To reveal the proteomic changes in these two Panax species in response to iron toxicity stress, plants of these two species were divided into a control group and an iron toxicity-stress group. An isobaric tags for relative and absolute quantitation (iTRAQ) proteomics approach was used to explore the changes in protein accumulation and the potential mechanisms underlying the response to iron toxicity stress in the two Panax species. Proteomic analyses revealed approximately 725 differentially expressed proteins (DEPs) in the iron toxicity-stress and control groups, including 233 and 492 proteins whose expression was upregulated and downregulated, respectively. The expression of DEPs related to photosynthesis was significantly downregulated, and DEPs whose expression was significantly upregulated were associated with redox reactions. Many upregulated DEPs were also involved in pathways such as those involving phenylpropanoid, flavonoid, isoflavone and ginsenoside synthesis. The abundance of some ginsenoside monomers (Rg and Rb) also significantly increased in P. ginseng and P. quinquefolius. Moreover, P. quinquefolius contained 455 DEPs whose expression was higher than that in P. ginseng, including many proteins related to the regulation of ion homeostasis, indicating that P. quinquefolius is more resistant to iron toxicity stress than P. ginseng is.
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http://dx.doi.org/10.1016/j.ecoenv.2021.112648DOI Listing
August 2021

Effects of ginseng soluble dietary fiber on serum antioxidant status, immune factor levels and cecal health in healthy rats.

Food Chem 2021 Dec 20;365:130641. Epub 2021 Jul 20.

Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, 130112 Changchun, Jilin, China. Electronic address:

As an important component of ginseng, the in vivo benefits of ginseng water-soluble dietary fiber (ginseng-SDF) have not been fully revealed. To explore these benefits, healthy rats were given ginseng-SDF (200, 400, and 800 mg/kg body weight/day) by gavage for 15 days. The results showed that ginseng-SDF significantly improved the rats' growth performance and serum antioxidant status. Insulin-like growth factor (IGF-1 and IGF-2) and immunoglobulin (IgA, IgM, and IgG) levels in the ginseng-SDF groups were increased. High-dose ginseng-SDF significantly increased the cecal butyric acid proportion compared with the K group. Ginseng-SDF increased the abundance of Firmicutes and promoted the proliferation of probiotics such as Lactobacillus, and cellulose decomposers such as Ruminococcus and Clostridium in cecal microflora. These altered microflora were correlated with growth performance, antioxidant status and immunoglobulin indexes. The above results suggested that ginseng-SDF might have positive effects on growth, oxidative-immune levels and cecal health in rats.
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http://dx.doi.org/10.1016/j.foodchem.2021.130641DOI Listing
December 2021

Direct Detection and Visualization of the H Reaction Process in a VO Cathode for Aqueous Zinc-Ion Batteries.

J Phys Chem Lett 2021 Aug 22;12(30):7076-7084. Epub 2021 Jul 22.

Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China.

Because they are safer and less costly than state-of-the-art Li-ion batteries, aqueous zinc-ion batteries (AZIBs) have been attracting more attention in stationary energy storage and industrial energy storage. However, the electrochemical reaction of H in all of the cathode materials of AZIBs has been puzzling until now. Herein, highly oriented VO monocrystals grown on a Ti current collector (VO-Ti) were rationally designed as the research model, and such a well-aligned VO cathode also displayed excellent zinc-ion storage capability (e.g., a reversible capacity of 148.4 mAh/g at a current density of 2 A/g). To visualize the H reaction process, we used time-of-flight secondary-ion mass spectrometry. With the benefit of such a binder-free and conductor-free electrode design, a clear and intuitive reaction of H in a VO cathode is obtained, which is quite significant for unraveling the accurate reaction mechanism of VO in AZIBs.
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http://dx.doi.org/10.1021/acs.jpclett.1c01776DOI Listing
August 2021

Multifunctional Metal Phosphides as Superior Host Materials for Advanced Lithium-Sulfur Batteries.

Chemistry 2021 Jul 19. Epub 2021 Jul 19.

Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, P. R. China.

For the past few years, a new generation of energy storage systems with large theoretical specific capacity has been urgently needed because of the rapid development of society. Lithium-sulfur (Li-S) batteries are regarded as one of the most promising candidates for novel battery systems, since their resurgence at the end of the 20th century Li-S batteries have attracted ever more attention, attributed to their notably high theoretical energy density of 2600 W h kg , which is almost five times larger than that of commercial lithium-ion batteries (LIBs). One of the determining factors in Li-S batteries is how to design/prepare the sulfur cathode. For the sulfur host, the major technical challenge is avoiding the shuttling effect that is caused by soluble polysulfides during the reaction. In past decades, though the sulfur cathode has developed greatly, there are still some enormous challenges to be conquered, such as low utilization of S, rapid decay of capacity, and poor cycle life. This article spotlights the recent progress and foremost findings in improving the performance of Li-S batteries by employing multifunctional metal phosphides as host materials. The current state of development of the sulfur electrode of Li-S batteries is summarized by emphasizing the relationship between the essential properties of metal phosphide-based hybrid nanomaterials, the chemical reaction with lithium polysulfides and the latter's influence on electrochemical performance. Finally, trends in the development and practical application of Li-S batteries are also pointed out.
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http://dx.doi.org/10.1002/chem.202101873DOI Listing
July 2021

Occurrence of postharvest snow rot caused by on Asian ginseng in China.

Plant Dis 2021 Jul 20. Epub 2021 Jul 20.

Chinese Academy of Agricultural Sciences, 12661, Institute of Special Wild Economic Animal and Plant Science, Chinese Academy of Agricultural Sciences, Changchun, Jilin, China;

Asian ginseng () is a valuable medicinal plant that is commercially cultivated in China. A long postharvest storage period is required before ginseng is processed. From October 2019 to May 2020, snow rot was observed on the roots of 4- and 5-year-old fresh ginseng stored in three cold storage facilities located in Tonghua and Changbai cities in northeastern China, which are the most important regions for Asian ginseng production. We sampled 1,000 ginseng roots from the three cold storage facilities, and the average disease incidence was 21%. Initially, sparse hyphae and microsclerotia appeared on the root epidermis. Lesions gradually softened and the epidermis detached easily. Multiple infected sites slowly converged, resulting in the formation of a dense complex of multiple sclerotia and thick hyphae on the surface of the ginseng root as well as internal decay. The infection eventually spread to the adjacent ginseng roots (Fig. 1). Sixteen diseased ginseng roots were collected and then sclerotia were removed from the root surface, immersed in 1% NaClO for 2 min, rinsed three times with sterile water, and placed on potato dextrose agar (PDA) containing streptomycin (40 μg/mL) in Petri dishes. After a 3-day incubation at 20 °C in darkness, 22 suspected Sclerotinia isolates were obtained. Isolates SN1 and SN2 were randomly selected for identification. On PDA, fast-growing colonies produced white, sparse, powdery, and cotton-like aerial mycelia, and the reverse side showed the same color (Fig. 2). Small and white sclerotial primordia formed 3 days later and a ring of sclerotia was detected at the plate periphery. At 7 to 10 days after incubation, the mature sclerotia were black, spherical-to-subspherical, and elongated or fused to form irregular shapes. Each Petri dish produced 55-65 sclerotia, measuring 1.1 × 1.2 to 3.2 × 3.9 mm (n = 100). The sclerotia were firmly attached to the agar surface. The isolates were initially identified as sp. (Saito 1997). After sequencing the nuclear ribosomal internal transcribed spacer region (MW927134 and MW927135) and the β-tubulin gene (MW929179 and MW929180) (White et al. 1990; Glass and Donaldson 1995), BLAST searches revealed 100% homology with JX262268 and JX296007 of the published strain KGC-S0601, respectively. The pathogenicity of the two isolates was tested using detached ginseng roots. Briefly, healthy roots were washed, surface-disinfested with 75% alcohol, and rinsed with sterile water. Mycelial plugs (5 mm diameter) removed from the margin of actively growing colonies on PDA were placed on the ginseng roots. For each isolate, four roots were inoculated, with two plugs per root. Additionally, PDA plugs without mycelia were used as the negative control. The roots were placed in a fresh-keeping box at 20 °C in darkness and evaluated after 7 days. The pathogenicity test was repeated twice. The symptoms on the inoculated roots were the same as those observed on the roots during cold storage, whereas the control roots remained symptomless. The same fungus was reisolated consistently from all infected roots and its identity was confirmed by resequencing, thereby fulfilling Koch's postulates. To the best of our knowledge, this is the first report of causing postharvest snow rot on Asian ginseng in China. The occurrence of this disease threatens the postharvest storage of Asian ginseng. Hence, effective management strategies must be developed.
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http://dx.doi.org/10.1094/PDIS-04-21-0868-PDNDOI Listing
July 2021

Ultralow Volume Change of P2-Type Layered Oxide Cathode for Na-Ion Batteries with Controlled Phase Transition by Regulating Distribution of Na.

Angew Chem Int Ed Engl 2021 Sep 11;60(38):20960-20969. Epub 2021 Aug 11.

School of Materials Science and Engineering and Guangdong Provincial Key Laboratory of Advanced Energy Storage Mater, South China University of Technology, Guangzhou, 510641, China.

Most P2-type layered oxides exhibit a large volume change when they are charged into high voltage, and it further leads to bad structural stability. In fact, high voltage is not the reason which causes the irreversible phase transition. There are two internal factors which affect structural evolution: the amount and distribution of Na ions retained in the lattice. Hereon, a series of layered oxides Na Mn Ni Co O (1/3≤x≤2/3) were synthesized. It is observed that different components have different structural evolutions during the charge/discharge processes, and further researches find that the distribution of Na ions in layers is the main factor. By controlling the distribution of Na ions, the phase transition process can be well controlled. As the referential component, P2-Na Mn Ni Co O cathode with uniform distribution of Na ions is cycled at the voltage window of 1.5-4.5 V, which exhibits a volume change as low as 1.9 %. Such a low strain is beneficial for cycling stability. The current work provides a new and effective route to regulate the structural evolution of the promising P2-type layered cathode for sodium ion batteries.
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http://dx.doi.org/10.1002/anie.202108109DOI Listing
September 2021

Freestanding Sodium Vanadate/Carbon Nanotube Composite Cathodes with Excellent Structural Stability and High Rate Capability for Sodium-Ion Batteries.

ACS Appl Mater Interfaces 2021 Jan 4;13(1):816-826. Epub 2021 Jan 4.

Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China.

Sodium vanadate NaVO (NVO) is one of the most promising cathode materials for sodium-ion batteries because of its low cost and high theoretical capacity. Nevertheless, NVO suffers from fast capacity fading and poor rate capability. Herein, a novel free-standing NVO/multiwalled carbon nanotube (MWCNT) composite film cathode was synthesized and designed by a simple hydrothermal method followed by a dispersion technique with high safety and low cost. The kinetics analysis based on cyclic voltammetry measurements reveals that the intimate integration of the MWCNT 3D porous conductive network with the 3D pillaring tunnel structure of NVO nanorods enhances the Na intercalation pseudocapacitive behavior, thus leading to exceptional rate capability and long lifespan. Furthermore, the NVO/MWCNT composite exhibits excellent structural stability during the charge/discharge process. With these benefits, the composite delivers a high discharge capacity of 217.2 mA h g at 0.1 A g in a potential region of 1.5-4.0 V. It demonstrates a superior rate capability of 123.7 mA h g at 10 A g. More encouragingly, it displays long lifespan; impressively, 96% of the initial capacity is retained at 5 A g for over 500 cycles. Our work presents a promising strategy for developing electrode materials with a high rate capability and a long cycle life.
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http://dx.doi.org/10.1021/acsami.0c21328DOI Listing
January 2021

Ni-Rich Layered Oxide with Preferred Orientation (110) Plane as a Stable Cathode Material for High-Energy Lithium-Ion Batteries.

Nanomaterials (Basel) 2020 Dec 11;10(12). Epub 2020 Dec 11.

Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China.

The cathode, a crucial constituent part of Li-ion batteries, determines the output voltage and integral energy density of batteries to a great extent. Among them, Ni-rich LiNiCoMnO (x + y + z = 1, x ≥ 0.6) layered transition metal oxides possess a higher capacity and lower cost as compared to LiCoO, which have stimulated widespread interests. However, the wide application of Ni-rich cathodes is seriously hampered by their poor diffusion dynamics and severe voltage drops. To moderate these problems, a nanobrick Ni-rich layered LiNiCoMnO cathode with a preferred orientation (110) facet was designed and successfully synthesized via a modified co-precipitation route. The galvanostatic intermittent titration technique (GITT) and electrochemical impedance spectroscopy (EIS) analysis of LiNiCoMnO reveal its superior kinetic performance endowing outstanding rate performance and long-term cycle stability, especially the voltage drop being as small as 67.7 mV at a current density of 0.5 C for 200 cycles. Due to its unique architecture, dramatically shortened ion/electron diffusion distance, and more unimpeded Li-ion transmission pathways, the current nanostructured LiNiCoMnO cathode enhances the Li-ion diffusion dynamics and suppresses the voltage drop, thus resulting in superior electrochemical performance.
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http://dx.doi.org/10.3390/nano10122495DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7764293PMC
December 2020

Functional soluble dietary fiber from ginseng residue: Polysaccharide characterization, structure, antioxidant, and enzyme inhibitory activity.

J Food Biochem 2020 12 18;44(12):e13524. Epub 2020 Oct 18.

Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Changchun, China.

Ginseng (Panax ginseng C.A. Meyer) is the most famous edible Chinese herbal medicine. In the present study, soluble dietary fiber of ginseng (ginseng-SDF, 8.98% content) was extracted from ginseng residue, and its physicochemical characterization, structure, and biological activities were studied. Ginseng-SDF was an acidic heteropolysaccharide (uronic acid, 4.42% content) rich in protein, amino acids, and mineral elements. Glucose was its main monosaccharide composition (58.03%). Ginseng-SDF had a porous microstructure, a typical cellulose I structure and a large number of hydroxyl functional groups. These chemical composition and structural characteristics gave ginseng-SDF a good water solubility (98.56%), oil-holding capacity (OHC) (3.01 g/g), and biological activities, as the antioxidant activity (13.35 μM TE/g, 105.17 μM TE/g, 54.20 μM TE/g for DPPH, ABTs, and FRAP assays, respectively), glucose diffusion retardation index (GDRI, 33.33%-7.43%), and α-amylase/α-glucosidase inhibitory activities (IC , 6.70 mg/ml, and 4.89 mg/ml, respectively). The results suggested that ginseng residue is a valuable source of functional dietary fiber, and the ginseng-SDF has a potential use in antioxidant and hypoglycemic foods. PRACTICAL APPLICATIONS: Ginseng has long been popular as a health food in Asia, North America, and Europe. Ginseng residue is rich in polysaccharides, dietary fiber, proteins, and other components, which is also of great research value. However, there are few studies focus on the soluble dietary fiber of ginseng at present. The research shows that ginseng residue is a valuable source of functional dietary fiber. The chemical components and structural characteristics give ginseng-SDF a noteworthy antioxidant activity and enzyme inhibitory activity in vitro. These properties and biological activities indicate that ginseng-SDF has application value in antioxidant and hypoglycemic foods.
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http://dx.doi.org/10.1111/jfbc.13524DOI Listing
December 2020

Cathodes for Aqueous Zn-Ion Batteries: Materials, Mechanisms, and Kinetics.

Chemistry 2021 Jan 22;27(3):830-860. Epub 2020 Oct 22.

Guangdong Provincial Key Laboratory of Advanced, Energy Storage Materials, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, P. R. China.

As concerns about the safety of lithium-ions batteries (LIBs) increases, aqueous zinc-ion batteries (ZIBs) with a lower cost, higher safety, and higher co-efficiency have attracted more and more interest. However, finding suitable cathode materials is still an urgent problem in ZIBs. In recent years, a lot of significant works have been reported, including manganese-based cathodes, vanadium-based cathodes, Prussian blue analog-based materials, and sustainable quinone cathodes. In this review, some typical cathode materials are introduced. The detailed storage mechanisms and methods for improving the reaction kinetics of the zinc ions are summarized. Finally, the issues, challenges, and the research directions are provided.
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http://dx.doi.org/10.1002/chem.202002202DOI Listing
January 2021

Solvent-Free Method Prepared a Sandwich-like Nanofibrous Membrane-Reinforced Polymer Electrolyte for High-Performance All-Solid-State Lithium Batteries.

ACS Appl Mater Interfaces 2020 May 29;12(19):21586-21595. Epub 2020 Apr 29.

Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China.

Solid polymer electrolytes (SPEs) with the advantages of high safety, low volatility, and the ability to suppress Li dendrites are highly desirable to be used in next generation high-safety and high-energy lithium-ion batteries. The exploration of SPEs with superior comprehensive properties has received extensive attention for high-performance all-solid-state batteries (ASSBs). Herein, a sandwich-like nanofibrous membrane-reinforced poly-caprolaclone diol and trimethyl phosphate (TMP) composite polymer electrolyte (CPE) has been designed by a facile "solvent-free" solution-casting method. Specifically, the flame-retardant TMP is employed as a plasticizer, which can improve the ionic conductivity effectively. The as-prepared solid electrolyte exhibits superior comprehensive performance in terms of high ionic conductivity, wide electrochemical window, good compatibility with lithium metal, and superior thermal stability. Furthermore, the assembled Li//LiFePO ASSBs with this solid CPE show outstanding cycling stability and high average discharge capacity at room temperature (30 °C). Undoubtedly, our study provides a new facile method and a qualified solid electrolyte material for next generation high-performance ASSBs.
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http://dx.doi.org/10.1021/acsami.0c02291DOI Listing
May 2020

Recent Progress of P2-Type Layered Transition-Metal Oxide Cathodes for Sodium-Ion Batteries.

Chemistry 2020 Jun 28;26(35):7747-7766. Epub 2020 Apr 28.

Guangdong Provincial Key Laboratory of Advanced Energy Storage, Materials, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, P.R. China.

Sodium-ion batteries (SIBs) have attracted much attention due to their abundance, easy accessibility, and low cost. All of these advantages make them potential candidates for large-scale energy storage. The P2-type layered transition-metal oxides (Na TMO ; TM=Mn, Co, Ni, Ti, Fe, V, Cr, and a mixture of multiple elements) exhibit good Na ion conductivity and structural stability, which make them an excellent choice for the cathode materials of SIBs. Herein, the structural evolution, anionic redox reaction, some challenges, and recent progress of Na TMO cathodes for SIBs are reviewed and summarized. Moreover, a detailed understanding of the relationship of chemical components, structures, phase compositions, and electrochemical performance is presented. This Review aims to provide a reference for the development of P2-type layered transition-metal oxide cathode materials for SIBs.
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http://dx.doi.org/10.1002/chem.201905131DOI Listing
June 2020

B,N Codoped Graphitic Nanotubes Loaded with Co Nanoparticles as Superior Sulfur Host for Advanced Li-S Batteries.

Small 2020 Feb 22;16(7):e1906634. Epub 2020 Jan 22.

Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, P. R. China.

Lithium-sulfur batteries (LSBs) are considered as one of the best candidates for novel rechargeable batteries due to their high energy densities and abundant required materials. However, the poor conductivity and large volume expansion of sulfur and the "shuttle effect" of lithium polysulfides (LPSs) have significantly hindered the development and successful commercialization of LSBs. Bean-like B,N codoped carbon nanotubes loaded with Co nanoparticles ([email protected]), which can act as advanced sulfur hosts for the novel LSB cathode, are fabricated. Uniform graphitic nanotubes improve the conductivity of the electrode and load more electroactive sulfur and buffer volume expansion during the electrochemical reaction. In addition, loaded Co nanoparticles and codoped B,N sites can significantly suppress the "shuttle effect" of LPSs with strong chemical interaction. It is established that the Co nanoparticles and codoped B,N can provide more active sites to catalyze the redox reaction of sulfur cathode. This stable [email protected] cathode displays an exceptional electrochemical performance (1160 mA h g after 200 cycles at 0.1 C) and outstanding stable cycle performance (1008 mA h g after 400 cycles at 1.0 C with an extremely low attenuation rate of 0.038% per cycle).
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http://dx.doi.org/10.1002/smll.201906634DOI Listing
February 2020

Silicon application and related changes in soil bacterial community dynamics reduced ginseng black spot incidence in Panax ginseng in a short-term study.

BMC Microbiol 2019 11 26;19(1):263. Epub 2019 Nov 26.

Institute of Special Wild Economic Animals and Plants, Chinese Academy of Agriculture Sciences, Changchun, 130112, People's Republic of China.

Background: This study analyzed the effect of silicon (Si) application on the occurrence of ginseng black spot caused by Alternaria panax. We explored the differences in soil physical and chemical factors and microbial community structure following Si application as well as the key factors that affected the occurrence of ginseng black spot in soil. Potted Panax ginseng plants were used to assess the effect of Si treatment on ginseng black spot. Soil physical and chemical properties were comprehensively analyzed. Bacterial communities were analyzed using Illumina HiSeq sequencing targeting the 16S rRNA gene.

Results: After inoculation with A. panax, the morbidity (and morbidity index) of ginseng with and without Si was 52% (46) and 83% (77), respectively. Soil physical and chemical analysis showed that under the ginseng black spot inoculation, bacterial communities were mainly affected by pH and available potassium, followed by ammonium nitrogen and available Si. NMDS and PLS-DA analyses and the heat maps of relative abundance revealed that Si application elevated the resistance of ginseng black spot as regulated by the abundance and diversity of bacterial flora in rhizosphere soils. Heatmap analysis at the genus level revealed that A. panax + Si inoculations significantly increased the soil community abundance of Sandaracinus, Polycyclovorans, Hirschia, Haliangium, Nitrospira, Saccharothrix, Aeromicrobium, Luteimonas, and Rubellimicrobium and led to a bacterial community structure with relative abundances that were significantly similar to that of untreated soil.

Conclusions: Short-term Si application also significantly regulated the structural impact on soil microorganisms caused by ginseng black spot. Our findings indicated that Si applications may possibly be used in the prevention and treatment of ginseng black spot.
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http://dx.doi.org/10.1186/s12866-019-1627-zDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6880445PMC
November 2019

Recent Progress in Organic-Inorganic Composite Solid Electrolytes for All-Solid-State Lithium Batteries.

Chemistry 2020 Feb 19;26(8):1720-1736. Epub 2019 Nov 19.

Guangdong Provincial Key Laboratory of, Advanced Energy Storage Materials, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, P.R. China.

Conventional lithium-ion batteries, with flammable organic liquid electrolytes, have serious safety problems, which greatly limit their application. All-solid-state batteries (ASSBs) have received extensive attention from large-scale energy-storage fields, such as electric vehicles (EVs) and intelligent power grids, due to their benefits in safety, energy density, and thermostability. As the key component of ASSBs, solid electrolytes determine the properties of ASSBs. In past decades, various kinds of solid electrolytes, such as polymers and inorganic electrolytes, have been explored. Among these candidates, organic-inorganic composite solid electrolytes (CSEs) that integrate the advantages of these two different electrolytes have been regarded as promising electrolytes for high-performance ASSBs, and extensive studies have been carried out. Herein, recent progress in organic-inorganic CSEs is summarized in terms of the inorganic component, electrochemical performance, effects of the inorganic ceramic nanostructure, and ionic conducting mechanism. Finally, the main challenges and perspectives of organic-inorganic CSEs are highlighted for future development.
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http://dx.doi.org/10.1002/chem.201904461DOI Listing
February 2020

Mechanistic Understanding of Metal Phosphide Host for Sulfur Cathode in High-Energy-Density Lithium-Sulfur Batteries.

ACS Nano 2019 Aug 2;13(8):8986-8996. Epub 2019 Aug 2.

School of Materials Science and Engineering and Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials , South China University of Technology , Guangzhou , 510641 , China.

For solving the drawbacks of low conductivity and the shuttle effect in a sulfur cathode, various nonpolar carbon and polar metal compounds with strong chemical absorption ability are applied as sulfur host materials for lithium-sulfur (Li-S) batteries. Nevertheless, previous research simply attributed the performance improvement of sulfur cathodes to the chemical adsorption ability of polar metal compounds toward lithium polysulfides (LPS), while a deep understanding of the enhanced electrochemical performance in these various sulfur hosts, especially at the molecular levels, is still unclear. Herein, for a mechanistic understanding of superior metal phosphide host in Li-S battery chemistry, an integrated phosphide-based host of CF/[email protected] (carbon cloth with grown [email protected] nanotube arrays) is chosen as the model, and this binder-free cathode can exclude interference from the binder and conductive additives. With a systematic electrochemical investigation of the loading sulfur in such oxide- and phosphide-based hosts (CF/[email protected] and CF/[email protected]), it is found that CF/[email protected]@S shows much superior Li-S performances. The greatly enhanced performance of CF/[email protected]@S suggests that FeP can well suppress the shuttle effect of LPS and accelerate their transformation during the charge-discharge process. The first-principles calculations reveal the performance variations of FeO and FeP in Li-S batteries mainly because the shifts of the p band of the FeP could accelerate the interfacial electronics transfer dynamics by increasing the electronic concentration in the Fermi level of adsorbed LiS. The current work sheds light on the promising design of superior Li-S batteries from both theoretical and experimental aspects.
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http://dx.doi.org/10.1021/acsnano.9b02903DOI Listing
August 2019

Effects of different substrates on low-temperature storage of fresh ginseng.

J Sci Food Agric 2019 Nov 12;99(14):6258-6266. Epub 2019 Aug 12.

Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Jilin, China.

Background: Fresh ginseng was buried in three types of sand with different moisture contents and three types of soil and then stored at 2 °C to determine the effects of these storage substrates on fresh ginseng.

Results: At a storage time of 200 days, ginseng stored in underforest soil softened the most slowly and had a significantly greater firmness compared to the other samples (P < 0.05). The amount of most ginsenosides changed after storage for most of the substrates. Samples stored in ginseng soil and biological fertilizer had the highest concentration of total saponin and ginseng polysaccharides, respectively. Fresh ginseng stored in medium-water content sand had a significantly lower polyphenol oxidase activity (P < 0.05). A significant difference was observed in the total concentration of nucleosides and nucleobases between the ginseng samples stored with and without substrates (P < 0.05).

Conclusion: The data obtained in the present study suggest that the use of storage substrates is an optimal method for extending the shelf life of fresh ginseng without detrimental effects on its components. © 2019 Society of Chemical Industry.
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http://dx.doi.org/10.1002/jsfa.9899DOI Listing
November 2019

Facile Synthesis of Peapod-Like Cu Ge/[email protected] as a High-Capacity and Long-Life Anode for Li-Ion Batteries.

Chemistry 2019 Sep 7;25(49):11486-11493. Epub 2019 Aug 7.

School of Materials Science and Engineering, Guangdong Provincial Key Laboratory of, Advanced Energy Storage Materials, South China University of, Technology, Guangzhou, 510641, P.R. China.

As anode materials for high-performance Li-ion batteries, peapod-like Ge-based composites, including Ge, a Li-inactive conducting Cu Ge, and a porous carbon matrix are synthesized simply by annealing CuGeO @dopamine in a H /Ar atmosphere. The introduction of the carbon layer and inactive alloying phase Cu Ge not only enhances the electrical conductivity of the Ge anode, but also reduces the volume change of Ge during the cell cycle as a buffer. In particular, the anode of this peapod-like Cu Ge/[email protected] shows an excellent long cycle life as well as outstanding capacity performance, with a discharge specific capacity up to 934 mA h g after 500 cycles.
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http://dx.doi.org/10.1002/chem.201901629DOI Listing
September 2019

Self-Supported and Flexible Sulfur Cathode Enabled via Synergistic Confinement for High-Energy-Density Lithium-Sulfur Batteries.

Adv Mater 2019 Aug 20;31(33):e1902228. Epub 2019 Jun 20.

Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, P. R. China.

Lithium-sulfur (Li-S) batteries have attracted much attention in the field of electrochemical energy storage due to their high energy density and low cost. However, the "shuttle effect" of the sulfur cathode, resulting in poor cyclic performance, is a big barrier for the development of Li-S batteries. Herein, a novel sulfur cathode integrating sulfur, flexible carbon cloth, and metal-organic framework (MOF)-derived N-doped carbon nanoarrays with embedded CoP ([email protected]/C) is designed. These unique flexible nanoarrays with embedded polar CoP nanoparticles not only offer enough voids for volume expansion to maintain the structural stability during the electrochemical process, but also promote the physical encapsulation and chemical entrapment of all sulfur species. Such designed [email protected]/C cathodes with synergistic confinement (physical adsorption and chemical interactions) for soluble intermediate lithium polysulfides possess high sulfur loadings (as high as 4.17 mg cm ) and exhibit large specific capacities at different C-rates. Specially, an outstanding long-term cycling performance can be reached. For example, an ultralow decay of 0.016% per cycle during the whole 600 cycles at a high current density of 2C is displayed. The current work provides a promising design strategy for high-energy-density Li-S batteries.
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http://dx.doi.org/10.1002/adma.201902228DOI Listing
August 2019

Dramatically Enhanced Li-Ion Storage of [email protected] Anodes through TiO Homogeneous Hybridization.

Chemistry 2019 Jan 6;25(2):582-589. Epub 2018 Dec 6.

School of Materials Science and Engineering and, Guangdong Provincial Key Laboratory of, Advanced Energy Storage Materials, South China University of, Technology, Guangzhou, 510641, P.R. China.

Amorphous nanoparticles of ZnO and TiO embedded in carbon nanocages (AZT⊂CNCs) were successfully synthesized through a simple annealing process of TiO -coated zeolitic imidazolate framework-8 (ZIF-8). In the current anode of AZT⊂CNCs, tiny ZnO and TiO nanoparticles were uniformly distributed in the carbon matrix (carbon nanocages), which could effectively buffer the volume expansion of electroactive ZnO and provide excellent electric conductivity. After fully investigating the electrochemical performance of the AZT⊂CNCs samples obtained with different additive amounts of tetrabutyl orthotitanate (TBOT) for TiO coating, it has been found that AZT-30 (0.1 g ZIF-8 with 30 mL TBOT) shows the best cycle stability (510 mA h g after 350 cycles at 200 mA g ) and a superior rate capability (610 mA h g after 3500 cycles at 2 A g ). The greatly enhanced Li-ion storage performance could be ascribed to the fact that the introduction of amorphous TiO could activate the reversible lithiation/delithiation reaction of ZnO during the charge/discharge process.
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http://dx.doi.org/10.1002/chem.201804211DOI Listing
January 2019

[email protected] Nanotube Arrays Grown on Carbon Fabric as a Low Potential and Freestanding Anode for High-Performance Li-Ion Batteries.

Small 2018 Jul 26;14(30):e1800793. Epub 2018 Jun 26.

Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, P. R. China.

An anode of self-supported [email protected] nanotube arrays on carbon fabric (CF) is successfully fabricated via a facile template-based deposition and phosphorization route: first, well-aligned FeOOH nanotube arrays are simply obtained via a solution deposition and in situ etching route with hydrothermally crystallized (Co,Ni)(CO ) OH nanowire arrays as the template; subsequently, these uniform FeOOH nanotube arrays are transformed into robust carbon-coated Fe O (Fe O @C) nanotube arrays via glucose adsorption and annealing treatments; and finally [email protected] nanotube arrays on CF are achieved through the facile phosphorization of the oxide-based arrays. As an anode for lithium-ion batteries (LIBs), these [email protected] nanotube arrays exhibit superior rate capability (reversible capacities of 945, 871, 815, 762, 717, and 657 mA h g at 0.1, 0.2, 0.4, 0.8, 1.3, and 2.2 A g , respectively, corresponding to area specific capacities of 1.73, 1.59, 1.49, 1.39, 1.31, 1.20 mA h cm at 0.18, 0.37, 0.732, 1.46, 2.38, and 4.03 mA cm , respectively) and a stable long-cycling performance (a high specific capacity of 718 mA h g after 670 cycles at 0.5 A g , corresponding to an area capacity of 1.31 mA h cm at 0.92 mA cm ).
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http://dx.doi.org/10.1002/smll.201800793DOI Listing
July 2018

Nanoconfined Oxidation Synthesis of N-Doped Carbon Hollow Spheres and MnO Encapsulated Sulfur Cathode for Superior Li-S Batteries.

Chemistry 2018 Mar 16;24(18):4573-4582. Epub 2018 Jan 16.

School of Materials Science and Engineering and Guangdong Provincial, Key Laboratory of Advanced Energy Storage Materials, South China University of Technology, Guangzhou, 510641, P.R. China.

The sulfur cathode, as a new generation of lithium-ion battery cathode material, has a high theoretical energy density of about 2500 Wh kg . However, the low conductivity of sulfur and the "shuttle effect", widely presenting in the lithiation/de-lithiation process, seriously hinder its practical application. Here, we report a new nanoconfined oxidation route (first complete oxidation of metal sulfide and subsequently partial oxidation of the generated S from sulfide) for S cathode encapsulated with MnO nanosheets and N-doped carbon hollow spheres. This nanoconfined oxidation route can successfully confine the sulfur particles in the interior of the carbon shell, and the rationally introduced nonpolar carbon and polar MnO can both reduce the dissolution of polysulfide during the charge-discharge process. The obtained well-defined S-MnO @C cathode exhibits high specific capacity with excellent cycling performance and superior rate capability.
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http://dx.doi.org/10.1002/chem.201704590DOI Listing
March 2018

Application of high-speed counter-current chromatography and HPLC to separate and purify of three polyacetylenes from Platycodon grandiflorum.

J Sep Sci 2018 Feb 21;41(3):789-796. Epub 2017 Dec 21.

Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Jilin, P. R. China.

Three polyacetylenes were isolated and purified from Platycodon grandiflorum A. DC for the first time by high-speed counter-current chromatography using a two-phase solvent system composed of hexane/ethyl acetate/methanol/water (1:31:1:31, v/v/v/v) and high-performance liquid chromatography with an Agilent ZORBAX® SB-C18 column (4.6 mm × 150 mm, 5 μm). After separation by high-speed counter-current chromatography and high-performance liquid chromatography, we obtained 3.5 mg of platetyolin A, 4.1 mg of platetyolin B, and 18.1 mg of lobetyolin with purities of 97.2, 96.7, and 96.9%, respectively. The purity of each compound was assessed by high-performance liquid chromatography and the chemical structures were evaluated by high-resolution electrospray ionization time-of-flight mass spectrometry and one- and two-dimensional NMR spectroscopy. Among the isolated compounds, platetyolin A and platetyolin B are newly reported compounds.
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http://dx.doi.org/10.1002/jssc.201700767DOI Listing
February 2018

Robust Pitaya-Structured Pyrite as High Energy Density Cathode for High-Rate Lithium Batteries.

ACS Nano 2017 09 21;11(9):9033-9040. Epub 2017 Aug 21.

Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, School of Materials Science and Engineering, South China University of Technology , Guangzhou, 510641, China.

To solve the serious problems (the agglomeration of nano-Fe, dissolution of polysulfide, and low electronic conductivity of LiS) of earth-abundant pyrite (FeS) cathodes for lithium batteries, a simple in situ encapsulation and transformation route has been successfully developed to synthesis pitaya-structured porous carbon embedded with FeS nanoparticles. Due to such a hierarchical architecture design, this cathode of pitaya-structured [email protected] can effectively avoid the serious agglomeration and coarsening of small Fe nanoparticles, reduce the dissolution of polysulfide, and provide superior kinetics toward lithium storage, resulting in enhanced reversibility and rate capability. Cycling in the voltage region of 1.0-3.0 V at 0.3 A g, the current conversion-based [email protected] cathode displays a high and stable energy density (about 1100 Wh kg), ultrahigh rate capability (a reversible capability of 660, 609, 554, 499, 449, and 400 mA h g at 0.2, 0.5, 1.0, 2.0, 5.0, and 10 A g, respectively), and stable cycling performance.
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http://dx.doi.org/10.1021/acsnano.7b03530DOI Listing
September 2017

Ionic Liquid-Based Ultrasonic-Assisted Extraction of Forsythosides from the Leaf of Forsythia suspensa (Thunb.) Vahl and Subsequent Separation and Purification by High-Speed Counter-Current Chromatography.

J Chromatogr Sci 2016 Sep 10;54(8):1445-52. Epub 2016 May 10.

College of Agronomy, Shandong Agricultural University, 271018 Taian, China.

An ionic liquid-based ultrasonic-assisted extraction (ILUAE) method was developed for the extraction of the two forsythosides, namely forsythosides I and A from the leaf of Forsythia suspensa (Thunb.) Vahl. Three kinds of l-alkyl-3-methylimidazolium ionic liquids with different alkyl chain and anion were investigated. The results indicated that ionic liquids showed remarkable effects on the extraction yields of forsythosides. In addition, several ILUAE ultrasonic parameters, such as the solvent concentration, solvent to solid ratio and extraction time have been optimized. Under these optimal conditions (e.g., with 0.6 M [C6MIM]Br, solvent to solid ratio of 15 mL/g and extraction time of 10 min), this approach gained the highest extraction yields of forsythoside I (0.89%) and forsythoside A (10.74%). Meanwhile, forsythosides in the ILUAE extract were separated and purified successfully through the high-speed counter-current chromatography with a two-phase solvent system consisting of ethyl acetate-ethanol-acetic acid-water (4 : 1 : 0.25 : 6, v/v). 5.4 mg of forsythoside I and 59.7 mg of forsythoside A were obtained from 120 mg of the prepurified sample in one-step separation, with the purity of 96.1 and 97.9%, respectively, as determined by high-performance liquid chromatography. Their structures were identified by (1)H nuclear magnetic resonance (NMR) and (13)C NMR.
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http://dx.doi.org/10.1093/chromsci/bmw069DOI Listing
September 2016

Preparative isolation, quantification and antioxidant activity of dihydrochalcones from Sweet Tea (Lithocarpus polystachyus Rehd.).

J Chromatogr B Analyt Technol Biomed Life Sci 2015 Oct 4;1002:372-8. Epub 2015 Sep 4.

Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, 130112 Changchun, China.

Dihydrochalcones are the main active components of Lithocarpus polystachyus Rehd. (Sweet Tea), they are directly related to the sweet tonic beverage and traditional herb. In this work, two runs of preparative high-speed counter-current chromatography (HSCCC) with a two-phase solvent system composed of n-hexane/ethyl acetate/ethanol/water (1:4:3:4, v/v) were employed to separate three dihydrochalcones (phloridzin, trilobatin and phloretin) from Sweet Tea. About 6.4mg of phloridzin, 48.4mg of trilobatin, and 4.7mg of phloretin with purities of 96.7%, 98.4% and 98.1% were obtained from 130mg of the crude Sweet Tea extract. Phloridzin, trilobatin, and phloretin had effective radical scavenging activities, with IC50 values of 866.80, 20.16 and 179.47μg/mL, respectively, in a 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical method. The contents of phloridzin, trilobatin and phloretin in dried old leaves and tender leaves of tea were in the range of 10.1-18.0, 113.7-128.8, 3.6-4.3mg/g and 9.3-9.8, 82.9-103.1, 1.9-2.5mg/g, respectively. The results indicated that the HPLC had good precision, accuracy and repeatability for the determination of three dihydrochalcones in samples.
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http://dx.doi.org/10.1016/j.jchromb.2015.08.045DOI Listing
October 2015

Aqueous ionic liquid based ultrasonic assisted extraction of four acetophenones from the Chinese medicinal plant Cynanchum bungei Decne.

Ultrason Sonochem 2013 Jan 20;20(1):180-6. Epub 2012 Jul 20.

State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural University, Taian 271018, China.

In this study, an aqueous ionic liquid based ultrasonic assisted extraction (ILUAE) method for the extraction of the four acetophenones, namely 4-hydroxyacetophenone (1), 2,5-dihydroxyacetophenone (2), baishouwubenzophenone (3) and 2,4-dihydroxyacetophenone (4) from the Chinese medicinal plant Cynanchum bungei was developed. Three kinds of aqueous l-alkyl-3-methylimidazolium ionic liquids with different anion and alkyl chain were investigated. The results indicated that ionic liquids (ILs) showed remarkable effects on the extraction efficiency of acetophenones. In addition, the ILUAE, including several ultrasonic parameters, such as the ILs concentration, solvent to solid ratio, power, particle size, temperature, and extraction time have been optimized. Under these optimal conditions (e.g., with 0.6M [C(4)MIM]BF(4), solvent to solid ratio of 35:1, power of 175 W, particle size of 60-80 mesh, temperature of 25 ° C and time of 50 min), this approach gained the highest extraction yields of four acetophenones 286.15, 21.65, 632.58 and 205.38 μg/g, respectively. The proposed approach has been evaluated by comparison with the conventional heat-reflux extraction (HRE) and regular UAE. The results indicated that ILUAE is an alternative method for extracting acetophenones from C. bungei.
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http://dx.doi.org/10.1016/j.ultsonch.2012.07.002DOI Listing
January 2013

An application of high-speed counter-current chromatography for separation and purification of bungeiside-A, bungeiside-B and baishouwubenzophenone from Cynanchum bungei Decne.

Phytochem Anal 2011 Nov-Dec;22(6):526-31. Epub 2011 Apr 4.

State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural University, 271018 Taian, China.

Introduction: Cynanchum bungei Decne (Baishouwu in China), is a famous traditional Chinese medicine that has been widely used as a tonic medicine or health food for centuries. Bungeiside-A, bungeiside-B and baishouwubenzophenone, as the major bioactive constituents in C. bungei, are challenging to separate and purify since bungeiside-A and -B are present in very low concentrations and have similar structures and high polarity.

Objective: To develop a method of isolation and purification of bungeiside-A and -B and baishouwubenzophenone from the Chinese medicinal plant Cynanchum bungei Decne by high-speed counter-current chromatography (HSCCC).

Methodology: The roots of C. bungei were extracted with light-petroleum (60-90 °C) and chloroform to remove the lipid substance. Then the residuals were extracted with methanol. The methanol extract was prepared for the subsequent HSCCC separation. The simple HSCCC method of separation and purification of bungeiside-A and -B and baishouwubenzophenone was established according to the solvent system, which was selected according to the measurement of partition coefficient (K). The purities of target compounds were test by HPLC and the structure was identified by ¹H NMR and ¹³C NMR.

Results: Bungeiside-A (9.4 mg), bungeiside-B (8.6 mg) and baishouwubenzophenone (5.7 mg) were obtained from 1.5 g of the methanol extract with purities of 93.2, 98.7 and 95.4%, respectively.

Conclusion: These results clearly demonstrate that HSCCC is a powerful tool for isolating and purifying components with similar structures, low concentration and high polarity from medicinal plant, such as bungeiside-A and -B and baishouwubenzophenone.
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http://dx.doi.org/10.1002/pca.1313DOI Listing
February 2012

Ultrasound-assisted extraction of five isoflavones from Maxim.

Sep Purif Technol 2011 Mar 25;78(1):49-54. Epub 2011 Jan 25.

State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural University, 271018, Taian, China.

This study investigated the use of ultrasound-assisted extraction (UAE) to improve the extraction efficiency of the classical solvent extraction techniques such as maceration extraction (ME) and soxhlet extraction (SE) to extract five isoflavones (tectoridin, iristectorin B, iristectorin A, tectorigenin and iristectorigenin A) from . The effects of various factors such as extraction solvent, solvent concentration, temperature, solvent to solid ratio, ultrasound power, extraction time and particle size on the yield of target components were investigated. The optimal UAE conditions found were: 70% (v/v) methanol solution, temperature 45 °C, solvent to solid ratio 15 ml/g, ultrasound power 150 W, extraction time 45 min and particle size 60-80 mesh. The results indicated that compared with ME at 18 h and SE at 6 h, UAE gave the highest extraction yields of tectoridin, iristectorin B, iristectorin A, tectorigenin, iristectorigenin A and total isoflavones at 45 min. The results indicated that UAE was an alternative method for extracting isoflavones from .
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http://dx.doi.org/10.1016/j.seppur.2011.01.017DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7108437PMC
March 2011

Simultaneous determination of flavonoids in different parts of Citrus reticulata 'Chachi' fruit by high performance liquid chromatography-photodiode array detection.

Molecules 2010 Aug 5;15(8):5378-88. Epub 2010 Aug 5.

State Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural University, Taian, China.

Flavonoids are important polyphenolic secondary metabolites in plant. Citrus reticulata 'Chachi' fruit are rich in flavonoids and are being used as functional antioxidant ingredients for the treatment of atherosclerosis and cancer, etc. A high performance liquid chromatography-photodiode array detection system was used to analyze five flavonoids, namely, naringin, hesperidin, didymin, tangeretin and nobiletin, in different parts of C. reticulata 'Chachi' fruit. The chromatographic analysis was performed on a C(18) column with a gradient elution of acetonitrile and water at a flow rate of 1.0 mL/min. Detection was carried out using a photodiode array detector at 280 nm. The calibration curves for the determination of all analytes showed good linearity over the investigated ranges (R2 > 0.9995). Precision and reproducibility were evaluated by six replicated analyses, and the R.S.D. values were less than 0.9% and 2.7%. The recoveries were between 98.37 and 103.89%. This method is promising to improve the quality control of different parts of C. reticulata 'Chachi' fruit.
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http://dx.doi.org/10.3390/molecules15085378DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6257720PMC
August 2010
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