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Lu J, Jiang Y, Jin B, Sun C, Wang L. Hyperspectral Imaging Combined with Deep Transfer Learning to Evaluate Flavonoids Content in Ginkgo biloba Leaves. Int J Mol Sci 2024; 25:9584. [PMID: 39273532 PMCID: PMC11395087 DOI: 10.3390/ijms25179584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2024] [Revised: 08/05/2024] [Accepted: 08/31/2024] [Indexed: 09/15/2024] Open
Abstract
Ginkgo biloba is a famous economic tree. Ginkgo leaves have been utilized as raw materials for medicines and health products due to their rich active ingredient composition, especially flavonoids. Since the routine measurement of total flavones is time-consuming and destructive, rapid, non-destructive detection of total flavones in ginkgo leaves is of significant importance to producers and consumers. Hyperspectral imaging technology is a rapid and non-destructive technique for determining the total flavonoid content. In this study, we discuss five modeling methods, and three spectral preprocessing methods are discussed. Bayesian Ridge (BR) and multiplicative scatter correction (MCS) were selected as the best model and the best pretreatment method, respectively. The spectral prediction results based on the BR + MCS treatment were very accurate (RTest2 = 0.87; RMSETest = 1.03 mg/g), showing a high correlation with the analytical measurements. In addition, we also found that the more and deeper the leaf cracks, the higher the flavonoid content, which helps to evaluate leaf quality more quickly and easily. In short, hyperspectral imaging is an effective technique for rapid and accurate determination of total flavonoids in ginkgo leaves and has great potential for developing an online quality detection system for ginkgo leaves.
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Affiliation(s)
- Jinkai Lu
- College of Horticulture and Landscape Architecture, Yangzhou University, Yangzhou 225009, China
| | - Yanbing Jiang
- College of Horticulture and Landscape Architecture, Yangzhou University, Yangzhou 225009, China
| | - Biao Jin
- College of Horticulture and Landscape Architecture, Yangzhou University, Yangzhou 225009, China
| | - Chengming Sun
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops, College of Agriculture, Yangzhou University, Yangzhou 225009, China
| | - Li Wang
- College of Horticulture and Landscape Architecture, Yangzhou University, Yangzhou 225009, China
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Liu Z, Li G, Zhang Y, Jin H, Liu Y, Dong J, Li X, Liu Y, Liang X. Blending Technology Based on HPLC Fingerprint and Nonlinear Programming to Control the Quality of Ginkgo Leaves. Molecules 2022; 27:molecules27154733. [PMID: 35897910 PMCID: PMC9332425 DOI: 10.3390/molecules27154733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 07/17/2022] [Accepted: 07/18/2022] [Indexed: 12/04/2022] Open
Abstract
The breadth and depth of traditional Chinese medicine (TCM) applications have been expanding in recent years, yet the problem of quality control has arisen in the application process. It is essential to design an algorithm to provide blending ratios that ensure a high overall product similarity to the target with controlled deviations in individual ingredient content. We developed a new blending algorithm and scheme by comparing different samples of ginkgo leaves. High-consistency samples were used to establish the blending target, and qualified samples were used for blending. Principal component analysis (PCA) was used as the sample screening method. A nonlinear programming algorithm was applied to calculate the blending ratio under different blending constraints. In one set of calculation experiments, the result was blended by the same samples under different conditions. Its relative deviation coefficients (RDCs) were controlled within ±10%. In another set of calculations, the RDCs of more component blending by different samples were controlled within ±20%. Finally, the near-critical calculation ratio was used for the actual experiments. The experimental results met the initial setting requirements. The results show that our algorithm can flexibly control the content of TCMs. The quality control of the production process of TCMs was achieved by improving the content stability of raw materials using blending. The algorithm provides a groundbreaking idea for quality control of TCMs.
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Affiliation(s)
- Zhe Liu
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; (Z.L.); (G.L.); (Y.Z.); (H.J.); (X.L.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guixin Li
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; (Z.L.); (G.L.); (Y.Z.); (H.J.); (X.L.)
| | - Yu Zhang
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; (Z.L.); (G.L.); (Y.Z.); (H.J.); (X.L.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hongli Jin
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; (Z.L.); (G.L.); (Y.Z.); (H.J.); (X.L.)
- Jiangxi Provincial Key Laboratory for Pharmacodynamic Material Basis of Traditional Chinese Medicine, Ganjiang Chinese Medicine Innovation Center, Nanchang 330100, China
| | - Yucheng Liu
- Heilongjiang ZhenBaoDao Pharmaceutical Co., Ltd., Haerbin 158400, China; (Y.L.); (J.D.)
| | - Jiatao Dong
- Heilongjiang ZhenBaoDao Pharmaceutical Co., Ltd., Haerbin 158400, China; (Y.L.); (J.D.)
| | - Xiaonong Li
- Jiangxi Provincial Key Laboratory for Pharmacodynamic Material Basis of Traditional Chinese Medicine, Ganjiang Chinese Medicine Innovation Center, Nanchang 330100, China
- Correspondence: (X.L.); (Y.L.); Tel.: +86-791-8306-1116 (X.L.); +86-411-8437-9519 (Y.L.)
| | - Yanfang Liu
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; (Z.L.); (G.L.); (Y.Z.); (H.J.); (X.L.)
- Jiangxi Provincial Key Laboratory for Pharmacodynamic Material Basis of Traditional Chinese Medicine, Ganjiang Chinese Medicine Innovation Center, Nanchang 330100, China
- Correspondence: (X.L.); (Y.L.); Tel.: +86-791-8306-1116 (X.L.); +86-411-8437-9519 (Y.L.)
| | - Xinmiao Liang
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; (Z.L.); (G.L.); (Y.Z.); (H.J.); (X.L.)
- Jiangxi Provincial Key Laboratory for Pharmacodynamic Material Basis of Traditional Chinese Medicine, Ganjiang Chinese Medicine Innovation Center, Nanchang 330100, China
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Mishra J, Khan W, Ahmad S, Misra K. Supercritical Carbon Dioxide Extracts of Cordyceps sinensis: Chromatography-based Metabolite Profiling and Protective Efficacy Against Hypobaric Hypoxia. Front Pharmacol 2021; 12:628924. [PMID: 34512317 PMCID: PMC8426348 DOI: 10.3389/fphar.2021.628924] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Accepted: 08/10/2021] [Indexed: 11/18/2022] Open
Abstract
The toxicity and disposal concerns of organic solvents used in conventional extraction purposes has entailed the need for greener alternatives. Among such techniques, supercritical fluid extraction (SFE) has gained popularity by yielding extracts of high purity in a much faster manner. Carbon dioxide (CO2) is generally preferred as a supercritical solvent because of its lower temperature requirements, better diffusivity and easy removal. The present study describes the characterization of supercritical CO2 extracts of Indian variety of Cordyceps sinensis (CS)- a high-altitude medicinal mushroom widely revered in traditional medicine for its extensive anti-hypercholesterolemic, anti-inflammatory, anti-proliferative and energy-enhancing properties. Experimental parameters viz. 300 and 350 bar of extraction pressure, 60°C of temperature, 0.4°L/h CO2 of flow rate and use of 1% (v/v) of ethanol as entrainer were optimized to prepare three different extracts namely, CSF1, CSF2 and CSF3. High-performance thin-layer chromatography (HPTLC) was used for assessing the quality of all the extracts in terms of cordycepin, the pivot biomarker compound in CS. Characterization by HPTLC and GC-MS confirmed the presence of flavonoids and nucleobases and, volatile organic compounds (VOCs), respectively. The chromatographic data acquired from metabolite profiling were subjected to chemometric analysis in an open source R studio which illustrated interrelatedness between CSF1 and CSF2 in terms of two major principal components. i.e. Dim 1 and Dim 2 whose values were 40.33 and 30.52% in variables factor map plotted using the HPTLC-generated retardation factor values. The factor maps based on retention times of the VOCs exhibited a variance of Dim 1 = 43.95% and Dim 2 = 24.85%. Furthermore, the extracts demonstrated appreciable antibacterial activity against Escherichia coli and Salmonella typhi by generation of reactive oxygen species (ROS), protein leakage and efflux pump inhibition within bacterial pathogens. CSFs were elucidated to be significantly cytoprotective (p < 0.05) in a simulated hypobaric hypoxia milieu (0.5% oxygen). CSF2 showed the best results by effectively improving the viability of human embryonic kidney (HEK 293) cells to 82.36 ± 1.76% at an optimum dose of 100 µg/ml. Levels of hypoxia inducible factor-1 alpha (HIF-1α) were modulated four-fold upon supplementation with CSF2. The results collectively evinced that the CSF extracts are substantially bioactive and could be effectively utilized as mycotherapeutics for multiple bioeffects.
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Affiliation(s)
| | - Washim Khan
- Bioactive Natural Products Laboratory, Department of Pharmacognosy and Phytochemistry, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, India.,National Center for Natural Products Research, The University of Mississippi, Oxford, MS, United States
| | - Sayeed Ahmad
- Bioactive Natural Products Laboratory, Department of Pharmacognosy and Phytochemistry, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, India
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Shen H, Zhang J, Guo C, Gao X, Chen J, Chang C, Han X, Wang L. Characterization and optimization of hydrothermal extraction of quercetin from
Quercus
leaves using response surface methodology. CAN J CHEM ENG 2021. [DOI: 10.1002/cjce.24196] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Haoling Shen
- School of Chemical Engineering Zhengzhou University Zhengzhou China
| | - Jiaojiao Zhang
- School of Chemical Engineering Zhengzhou University Zhengzhou China
| | - Chensi Guo
- School of Chemical Engineering Zhengzhou University Zhengzhou China
| | - Xiangyu Gao
- School of Chemical Engineering Zhengzhou University Zhengzhou China
| | - Junying Chen
- School of Chemical Engineering Zhengzhou University Zhengzhou China
- Henan Center for Outstanding Overseas Scientists Zhengzhou China
| | - Chun Chang
- School of Chemical Engineering Zhengzhou University Zhengzhou China
- Henan Center for Outstanding Overseas Scientists Zhengzhou China
| | - Xiuli Han
- School of Chemical Engineering Zhengzhou University Zhengzhou China
- Henan Center for Outstanding Overseas Scientists Zhengzhou China
| | - Lijun Wang
- Department of Natural Resources and Environmental Design North Carolina A & T State University Greensboro North Carolina USA
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5
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Supercritical extraction and antioxidant activity of major ingredients in Puerariae lobatae root, Pinus massoniana needle, Citrus reticulata peel and their mixture. J CO2 UTIL 2021. [DOI: 10.1016/j.jcou.2021.101518] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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6
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Graphene oxide-assisted ethanol reflux extraction of total flavonoids from Ginkgo biloba leaves: study of kinetics and mechanism. CHEMICAL PAPERS 2020. [DOI: 10.1007/s11696-019-00934-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Abstract
Hydrodynamic cavitation (HC) is a green technology that has been successfully used to intensify a number of process. The cavitation phenomenon is responsible for many effects, including improvements in mass transfer rates and effective cell-wall rupture, leading to matrix disintegration. HC is a promising strategy for extraction processes and provides the fast and efficient recovery of valuable compounds from plants and biomass with high quality. It is a simple method with high energy efficiency that shows great potential for large-scale operations. This review presents a general discussion of the mechanisms of HC, its advantages, different reactor configurations, its applications in the extraction of bioactive compounds from plants, lipids from algal biomass and delignification of lignocellulosic biomass, and a case study in which the HC extraction of basil leftovers is compared with that of other extraction methods.
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Extraction of anthocyanins from haskap berry pulp using supercritical carbon dioxide: Influence of co-solvent composition and pretreatment. Lebensm Wiss Technol 2018. [DOI: 10.1016/j.lwt.2018.08.042] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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10
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Advancement in the chemical analysis and quality control of flavonoid in Ginkgo biloba. J Pharm Biomed Anal 2015; 113:212-25. [PMID: 25812435 DOI: 10.1016/j.jpba.2015.03.006] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Revised: 03/04/2015] [Accepted: 03/05/2015] [Indexed: 11/21/2022]
Abstract
Flavonoids are the main active constituents in Ginkgo biloba L., which have been suggested to have broad-spectrum free-radical scavenging activities. This review summarizes the recent advances in the chemical analysis of the flavonoids in G. biloba and its finished products (from 2009 to 2014), including chemical composition, sample preparation, separation, detection and different quality criteria. More than 70 kinds of flavonoids have been identified in this plant. In this review, various analytical approaches as well as their chromatographic conditions have been described, and their advantages/disadvantages are also compared. Quantitative analyses of Ginkgo flavonoids applied by most pharmacopeias start with an acidic hydrolysis followed by determination of the resulting aglycones using HPLC. But increasing direct assay of individual flavonol glycosides found that many adulterated products were still qualified by the present tests. To obtain an authentic and applicable analytical approach for quality evaluation of Ginkgo and its finished products, related suggestions and opinions in the recent publications are mainly discussed in this review. This discussion on chemical analyses of Ginkgo flavonoids will also be found as a significant guide for widely varied natural flavonoids.
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11
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de Melo M, Silvestre A, Silva C. Supercritical fluid extraction of vegetable matrices: Applications, trends and future perspectives of a convincing green technology. J Supercrit Fluids 2014. [DOI: 10.1016/j.supflu.2014.04.007] [Citation(s) in RCA: 229] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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12
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Shen YB, Du Z, Wang Q, Guan YX, Yao SJ. Preparation of chitosan microparticles with diverse molecular weights using supercritical fluid assisted atomization introduced by hydrodynamic cavitation mixer. POWDER TECHNOL 2014. [DOI: 10.1016/j.powtec.2014.01.054] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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13
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Supercritical fluid assisted production of chitosan oligomers micrometric powders. Carbohydr Polym 2014; 102:400-8. [DOI: 10.1016/j.carbpol.2013.11.029] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Revised: 11/19/2013] [Accepted: 11/21/2013] [Indexed: 11/22/2022]
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14
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YU J, TANG C, GUAN Y, YAO S, ZHU Z. Sorption and Diffusion Behavior of Carbon Dioxide into Poly(l-lactic acid) Films at Elevated Pressures. Chin J Chem Eng 2013. [DOI: 10.1016/s1004-9541(13)60623-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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15
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Bioactive insulin microparticles produced by supercritical fluid assisted atomization with an enhanced mixer. Int J Pharm 2013; 454:174-82. [DOI: 10.1016/j.ijpharm.2013.07.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Revised: 06/18/2013] [Accepted: 07/02/2013] [Indexed: 11/24/2022]
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16
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Cheng SC, Huang MZ, Wu LC, Chou CC, Cheng CN, Jhang SS, Shiea J. Building blocks for the development of an interface for high-throughput thin layer chromatography/ambient mass spectrometric analysis: a green methodology. Anal Chem 2012; 84:5864-8. [PMID: 22816777 DOI: 10.1021/ac301178w] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Interfacing thin layer chromatography (TLC) with ambient mass spectrometry (AMS) has been an important area of analytical chemistry because of its capability to rapidly separate and characterize the chemical compounds. In this study, we have developed a high-throughput TLC-AMS system using building blocks to deal, deliver, and collect the TLC plate through an electrospray-assisted laser desorption ionization (ELDI) source. This is the first demonstration of the use of building blocks to construct and test the TLC-MS interfacing system. With the advantages of being readily available, cheap, reusable, and extremely easy to modify without consuming any material or reagent, the use of building blocks to develop the TLC-AMS interface is undoubtedly a green methodology. The TLC plate delivery system consists of a storage box, plate dealing component, conveyer, light sensor, and plate collecting box. During a TLC-AMS analysis, the TLC plate was sent to the conveyer from a stack of TLC plates placed in the storage box. As the TLC plate passed through the ELDI source, the chemical compounds separated on the plate would be desorbed by laser desorption and subsequently postionized by electrospray ionization. The samples, including a mixture of synthetic dyes and extracts of pharmaceutical drugs, were analyzed to demonstrate the capability of this TLC-ELDI/MS system for high-throughput analysis.
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Affiliation(s)
- Sy-Chyi Cheng
- Department of Chemistry, National Sun Yat-Sen University, Kaohsiung, Taiwan
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17
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Wang Q, Guan YX, Yao SJ, Zhu ZQ. The liquid volume expansion effect as a simple thermodynamic criterion in cholesterol micronization by supercritical assisted atomization. Chem Eng Sci 2012. [DOI: 10.1016/j.ces.2012.02.046] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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18
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Lou S, Chen Z, Liu Y, Ye H, Di D. Synthesis of Functional Adsorption Resin and Its Adsorption Properties in Purification of Flavonoids from Hippophae rhamnoides L. Leaves. Ind Eng Chem Res 2012. [DOI: 10.1021/ie201494k] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Song Lou
- Key Laboratory of Chemistry of Northwestern
Plant Resources and Key Laboratory for Natural Medicine of Gansu Province,
Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China
- Graduate University of the Chinese Academy of Sciences, Beijing 100049, PR China
| | - Zhenbin Chen
- Key Laboratory of Chemistry of Northwestern
Plant Resources and Key Laboratory for Natural Medicine of Gansu Province,
Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China
- State Key Laboratory of Gansu Advanced
Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou, 730050, PR China
| | - Yongfeng Liu
- Key Laboratory of Chemistry of Northwestern
Plant Resources and Key Laboratory for Natural Medicine of Gansu Province,
Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China
- Graduate University of the Chinese Academy of Sciences, Beijing 100049, PR China
| | - Helin Ye
- Key Laboratory of Chemistry of Northwestern
Plant Resources and Key Laboratory for Natural Medicine of Gansu Province,
Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China
- Graduate University of the Chinese Academy of Sciences, Beijing 100049, PR China
| | - Duolong Di
- Key Laboratory of Chemistry of Northwestern
Plant Resources and Key Laboratory for Natural Medicine of Gansu Province,
Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China
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19
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Kaur P, Chaudhary A, Singh B, Gopichand. An Efficient Microwave Assisted Extraction of Phenolic Compounds and Antioxidant Potential of Ginkgo biloba#. Nat Prod Commun 2012. [DOI: 10.1177/1934578x1200700222] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Flavonoid glycosides are a significant group of compounds found in Ginkgo biloba leaves, but the long extraction procedures in existing methods are a challenging problem. In this work, a microwave-assisted extraction (MAE) method has been developed for extracting bioactive compounds from G. biloba. Several variables were optimized, such as extracting solvent, microwave power, and extraction time that can potentially affect the extraction yield. The total phenolic content, antioxidant activity (using DPPH, ABTS and FRAP assays) and flavonoid glycosides of different extracts using RP-HPLC were assessed. The antioxidant capacity was found to be highest with MAE using 60% aq. ethanol as extracting solvent and microwave power of 120W for 20 min.
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Affiliation(s)
- Pushpinder Kaur
- Natural Plant Products Division, Institute of Himalayan Bioresource Technology (Council of Scientific and Industrial Research), Palampur-176 061, Himachal Pradesh, India
| | - Abha Chaudhary
- Natural Plant Products Division, Institute of Himalayan Bioresource Technology (Council of Scientific and Industrial Research), Palampur-176 061, Himachal Pradesh, India
| | - Bikram Singh
- Natural Plant Products Division, Institute of Himalayan Bioresource Technology (Council of Scientific and Industrial Research), Palampur-176 061, Himachal Pradesh, India
| | - Gopichand
- Natural Plant Products Division, Institute of Himalayan Bioresource Technology (Council of Scientific and Industrial Research), Palampur-176 061, Himachal Pradesh, India
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20
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Santos-Buelga C, Gonzalez-Manzano S, Dueñas M, Gonzalez-Paramas AM. Extraction and isolation of phenolic compounds. Methods Mol Biol 2012; 864:427-464. [PMID: 22367907 DOI: 10.1007/978-1-61779-624-1_17] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Phenolic compounds constitute a major class of plant secondary metabolites that are widely distributed in the plant kingdom and show a large structural diversity. These compounds occur as aglycones or glycosides, as monomers or constituting highly polymerized structures, or as free or matrix-bound compounds. Furthermore, they are not uniformly distributed in the plant and their stability varies significantly. This greatly complicates their extraction and isolation processes, which means that a single standardized procedure cannot be recommended for all phenolics and/or plant materials; procedures have to be optimized depending on the nature of the sample and the target analytes, and also on the object of the study. In this chapter, the main techniques for sample preparation, and extraction and isolation of phenolic compounds have been reviewed-from classical solvent extraction procedures to more modern approaches, such as the use of molecularly imprinted polymers or counter-current chromatography.
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Affiliation(s)
- Celestino Santos-Buelga
- Grupo de Investigación de Polifenoles (GIP-USAL), Facultad de Farmacia, Universidad de Salamanca, Salamanca, Spain.
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21
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Nunes AVM, Duarte CMM. Dense CO₂ as a Solute, Co-Solute or Co-Solvent in Particle Formation Processes: A Review. MATERIALS 2011; 4:2017-2041. [PMID: 28824121 PMCID: PMC5448852 DOI: 10.3390/ma4112017] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Revised: 10/13/2011] [Accepted: 10/19/2011] [Indexed: 11/16/2022]
Abstract
The application of dense gases in particle formation processes has attracted great attention due to documented advantages over conventional technologies. In particular, the use of dense CO₂ in the process has been subject of many works and explored in a variety of different techniques. This article presents a review of the current available techniques in use in particle formation processes, focusing exclusively on those employing dense CO₂ as a solute, co-solute or co-solvent during the process, such as PGSS (Particles from gas-saturated solutions®), CPF (Concentrated Powder Form®), CPCSP (Continuous Powder Coating Spraying Process), CAN-BD (Carbon dioxide Assisted Nebulization with a Bubble Dryer®), SEA (Supercritical Enhanced Atomization), SAA (Supercritical Fluid-Assisted Atomization), PGSS-Drying and DELOS (Depressurization of an Expanded Liquid Organic Solution). Special emphasis is given to modifications introduced in the different techniques, as well as the limitations that have been overcome.
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Affiliation(s)
- Ana V M Nunes
- Requimte/CQFB, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, Caparica 2829-516, Portugal.
| | - Catarina M M Duarte
- Instituto de Biologia Experimental e Tecnológica (IBET), Apartado 12, Oeiras 2781-901, Portugal.
- Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Avenida da Republica, Oeiras 2780-157, Portugal.
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22
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Du Z, Guan YX, Yao SJ, Zhu ZQ. Supercritical fluid assisted atomization introduced by an enhanced mixer for micronization of lysozyme: Particle morphology, size and protein stability. Int J Pharm 2011; 421:258-68. [PMID: 22001535 DOI: 10.1016/j.ijpharm.2011.10.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2011] [Revised: 09/08/2011] [Accepted: 10/02/2011] [Indexed: 10/16/2022]
Abstract
Supercritical fluid assisted atomization introduced by hydrodynamic cavitation mixer (SAA-HCM) was used to produce lysozyme microparticles with controlled particle size distribution in the range for aerosol drug delivery. The process is based on the atomization effect of carbon dioxide. The solubilization of certain amount of carbon dioxide in the solution plays the key role and the HCM can intensify mass transfer between carbon dioxide and liquid feedstock greatly. Water was used as the solvent to solubilize lysozyme and thus no organic residual was detected. The influences of process parameters on particle formation were investigated including temperature in the precipitator, pressure and temperature in the mixer, concentration of the solution and feed ratio CO(2)/solution. The particles were characterized with respect to their morphologies and particle size: well defined, spherical and separated particles with diameters ranging between 0.2 and 5μm could be always produced at optimum operating conditions. Bio-activity assay showed that good activity maintenance of higher than 85% for lysozyme was usually achieved. Solid state characterizations were further performed to investigate the changes of lysozyme in the process. Fourier transform infrared spectroscopy indicated that no change in secondary structure had occurred for processed lysozyme. X-ray diffraction analysis showed that the lysozyme particles produced remained similarly amorphous as the raw material. Differential scanning calorimetry and thermogravimetry analysis revealed that there was no significant difference in water association but with the increase of water content after processing.
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Affiliation(s)
- Zhe Du
- Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
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Controllable preparation and formation mechanism of BSA microparticles using supercritical assisted atomization with an enhanced mixer. J Supercrit Fluids 2011. [DOI: 10.1016/j.supflu.2010.12.002] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Zeng X, Qiu Q, Jiang C, Jing Y, Qiu G, He X. Antioxidant flavanes from Livistona chinensis. Fitoterapia 2011; 82:609-14. [PMID: 21277955 DOI: 10.1016/j.fitote.2011.01.017] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2010] [Revised: 01/18/2011] [Accepted: 01/18/2011] [Indexed: 11/16/2022]
Abstract
Three new flavanes and eight known flavonoids were isolated from the fruits of Livistona chinensis. The structure of the new flavanes were established as 2S,3S-3,5,7,3',5'-pentahydroxyflavane (1), 2R,3R-3,5,6,7,8,4'-hexahydroxyflavane (2) and 2R,3R-3,5,6,7,8,3',5'-heptahydroxyflavane (3), respectively, on the basis of chemical and spectroscopic data. The antiproliferative activity against four human tumor cell lines (HL-60, Mata, HepG2 and CNE-1) was evaluated. 1 had significantly antiproliferative effects against HL-60 and CNE-1 with the IC(50) of 0.2 ± 0.01 and 1.0 ± 0.1 μM, respectively, overpowering the reference compound in the assay (cisplatin). Most compounds also exhibited potent antioxidant activity.
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Affiliation(s)
- Xiaobin Zeng
- College of Pharmacy, Wuhan University, Wuhan 430071, China
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