Microwave-assisted extraction of effective constituents from a Chinese herbal medicine Radix puerariae

Guo, Zhenku; Jin, Qinhan; Guo-qiang, Fan; Duan, Yuxi; Qin, Chunxia; Wen, Miaowen

doi:10.1016/s0003-2670(01)00900-x

Cited by 158 publications

(77 citation statements)

References 16 publications

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“…Solvent quantity is also an important factor aff ecting pectin yield. It can be seen that the pectin yield increased with increasing liquid-to-solid ratio, which was probably because larger volumes of extraction solvent caused excessive swelling of the materials (Guo et al, 2001). Therefore, the cell walls ruptured, which resulted in easy release of pectin into the surrounding medium.…”

Section: Analysis Of Response Surfacesmentioning

confidence: 99%

Optimization of pectin extraction and antioxidant activities from Jerusalem artichoke

Xue-jie

et al. 2015

Chin. J. Ocean. Limnol.

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Jerusalem artichoke is an economic crop widely planted in saline-alkaline soil. The use of Jerusalem artichoke is of great signifi cance. In this study, the response surface method was employed to optimize the eff ects of processing variables (extraction temperature, pH, extraction time, and liquid-tosolid ratio) on the yield of Jerusalem artichoke pectin. Under the optimal extraction conditions: pH 1.52, 63.62 min, 100°C and a liquid-to-solid ratio of 44.4 mL/g, the maximum pectin yield was predicted to be 18.76%. Experiments were conducted under these optimal conditions and a pectin yield of 18.52±0.90% was obtained, which validated the model prediction. The eff ects of diff erent drying methods (freeze drying, spray drying and vacuum drying) on the properties of Jerusalem artichoke pectin were evaluated and they were compared with apple pectin. FTIR spectral analysis showed no major structural diff erences in Jerusalem artichoke pectin samples produced by various drying treatments. The antioxidant activities of pectin dried by diff erent methods were investigated using in vitro hydroxyl and DPPH radical scavenging systems. The results revealed that the activities of spray dried pectin (SDP) and apple pectin (AP) were stronger than those of vacuum oven dried pectin (ODP) and vacuum freeze dried pectin (FDP). Therefore compared with the other two drying methods, the spray drying method was the best.

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Section: Analysis Of Response Surfacesmentioning

confidence: 99%

Optimization of pectin extraction and antioxidant activities from Jerusalem artichoke

Xue-jie

et al. 2015

Chin. J. Ocean. Limnol.

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“…Closed-system microwave-assisted extraction (MAE) is an important technique for extracting valuable compounds from lignocellulosic materials (Guo et al 2001;Hao et al 2002;Gao et al 2006;Ghaly and Adams 2007;Hemwimon et al 2007;Ghani et al 2008;Yeoh et al 2008;Gujar et al 2009;Spigno and Faveri 2009;Michel et al 2011;. MAE of extractive substances may be affected by factors such as frequency and power of the microwave, time of applying microwave radiation, moisture content, particle size, ratio of solid to liquid, type and composition of solvent, temperature, pressure, and number of extraction cycles (Wang and Weller 2006;Yang and Zhang 2011;Hadkar et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Yield of Polyphenolic Substances Extracted From Spruce (Picea abies) Bark by Microwave-Assisted Extraction

Sládková¹,

Benedeková²,

Stopka³

et al. 2016

BioResources

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Closed-system microwave-assisted extraction was applied to extract total phenolics from spruce (Picea abies) bark, using 96.6% ethanol as an extractant. The influence of particle size (0.3; 1.0; 2.5 mm), time (3 to 20 min), and temperature (60; 80; 100 °C) on polyphenol recovery was also studied. Higher extraction temperature and smaller particle size resulted in a higher yield of extracted polyphenols. However, the effect of extraction time on yield was more complicated. The effect of all three factors is tentatively explained.

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“…Guo et al conducted an experiment for MAE of the puerarin from the herb Radix puerariae and it was found that extraction could be completed within 1 min [54]. MAE with 80% methanol as a solvent could dramatically reduce the extraction time of ginseng saponins from 12 h using conventional extraction methods to a few seconds [55].…”

Section: Microwave Assisted Extraction (Mae)mentioning

confidence: 99%

Novel Eco-Friendly Techniques for Extraction of Food Based Lipophilic Compounds from Biological Materials

Ae¹,

Singh²,

Nc³

et al. 2016

Nat Prod Chem Res

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Plant-based lipophilic compounds such as edible oils, phytochemicals, flavors, fragrances and colours are valuable products in the food, pharmaceutical and chemical industry. Extraction is one of the key processing steps in recovering and purifying lipophilic ingredients contained in plant-based materials. Lipophilic compounds are found in the cells of oil bearing plant seeds. Solvent extraction is the most common commercially used extraction method for low oil content materials. Solvent extraction has more extractability than existing commercial methods, but it also passes serious limitations and environmental issues. The Environmental Protection Agency has been much concerned regarding safety and environmental emissions associated with hexane usage in the solvent extraction process. Bio-solvents resulting from renewable raw materials and in particular from the biomass may become a solution of the existing problem. But the existing conventional extraction methods cannot respond to such solvent and hence need for new novel "Green" extraction technology having potential to overcome all limitations of existing technologies. This review will discuss the various possible novel eco-friendly extraction methods, their scientific concepts, principles, challenges, limitations and technological effort needed for successful implementation at the production scale.

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Microwave-assisted extraction of effective constituents from a Chinese herbal medicine Radix puerariae

Cited by 158 publications

References 16 publications

Optimization of pectin extraction and antioxidant activities from Jerusalem artichoke

Optimization of pectin extraction and antioxidant activities from Jerusalem artichoke

Yield of Polyphenolic Substances Extracted From Spruce (Picea abies) Bark by Microwave-Assisted Extraction

Novel Eco-Friendly Techniques for Extraction of Food Based Lipophilic Compounds from Biological Materials

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