Monitoring the effect of different microwave extraction parameters on the recovery of polyphenols from shiitake mushrooms: Comparison with hot-water and organic-solvent extractions

The research in this paper optimized the extraction technique of lentinan with ultrasonic assistant method on the basis of hot water extraction technique, and investigated the promoting function of ultrasound to polysaccharides extraction. Extraction condition was selected by means of orthogonal experimental design, four factors and three levels L9(34), after key elements were respectively chosen through single factor experiments. Comparison between optimal extraction parameters of two method, hot water extraction technique and ultrasonic assistant extraction technique, showed decreased extraction temperature and significantly shortened extraction time, which existed in the second means, improved the extraction efficiency. Lentinus edodes polysaccharide extracted with ultrasonic assistant technique, the extraction rate and polysaccharide content percentage increased 6.22% and 8.66% respectively, comparative to which extracted with hot water extraction technique.

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Optimization of the extraction of galactoglucomannans from Pinus halepensis

Holzforschung ◽

10.1515/hf-2020-0095 ◽

2020 ◽

Vol 0 (0) ◽

Author(s):

Nacera Benouadah ◽

Andrey Pranovich ◽

Djamel Aliouche ◽

Jalel Labidi ◽

Stefan Willför

Keyword(s):

High Performance ◽

Pinus Halepensis ◽

Hot Water ◽

Water Extraction ◽

Chemical Degradation ◽

Extraction Time ◽

Size Exclusion ◽

Hot Water Extraction ◽

Extraction Processes ◽

Extraction Parameters

AbstractThe effectiveness of pressurized hot-water extraction conditions for obtaining galactoglucomannans (GGMs) from Pinus halepensis suitable for applications like coatings and films packaging was investigated. For this purpose, high molar masses with high yields are required, presenting a serious challenge for hot-water extraction processes. The extraction of GGMs was carried out in an accelerated solvent extractor (ASE) and the isolation was performed by precipitation in ethanol. Three temperatures in the range 160–180 °C and five extraction times 5–90 min were tested in order to optimize extraction parameters of GGMs, avoiding thermal and chemical degradation in hot-water. Total dissolved solids (TDS) were determined gravimetrically after freeze-drying and weight average molar masses (Mw) were determined by high-performance size exclusion chromatography (HPSEC). Total non-cellulosic carbohydrates were determined by gas chromatography (GC) after acid methanolysis. Free monomers were additionally analyzed by GC. Lignin in water extracts was measured by an ultraviolet (UV) method. Acetic acid was determined after alkaline hydrolysis of acetyl groups and analyzed by HPSEC. The main parameters influencing the extraction processes of the GGMs, namely, extraction time and temperature were studied. Optimal extraction parameters of GGMs were identified at 170 °C and 20 min extraction time, with average Mw of extracted fraction of 7 kDa leading to a GGM yield of approximately 56 ${\text{mgg}}_{\text{o}.\text{d}.\text{m}}^{-1}$, corresponding to 6% on dry wood basis.

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Optimizing a sustainable ultrasound-assisted extraction method for the recovery of polyphenols from lemon by-products: comparison with hot water and organic solvent extractions

European Food Research and Technology ◽

10.1007/s00217-018-3049-9 ◽

2018 ◽

Vol 244 (8) ◽

pp. 1353-1365 ◽

Cited By ~ 13

Author(s):

Konstantinos Papoutsis ◽

Penta Pristijono ◽

John B. Golding ◽

Costas E. Stathopoulos ◽

Michael C. Bowyer ◽

...

Keyword(s):

Organic Solvent ◽

Extraction Method ◽

Hot Water ◽

Ultrasound Assisted Extraction ◽

Assisted Extraction ◽

Ultrasound Assisted ◽

By Products

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Purification Route of Pyrite from Coal Mining

Materials Science Forum ◽

10.4028/www.scientific.net/msf.869.155 ◽

2016 ◽

Vol 869 ◽

pp. 155-158

Author(s):

Camila Machado de Oliveira ◽

Adilson Oliveira ◽

Jeane Almeida do Rosário ◽

Agenor de Noni Jr. ◽

Michael Peterson

Keyword(s):

Solar Cells ◽

Organic Solvent ◽

Solid Waste ◽

Coal Mining ◽

Sulphuric Acid ◽

Sulphur Dioxide ◽

Hot Water ◽

Soluble Salts ◽

It Use ◽

Purity Level

Pyrite, mineral largely found in nature, is considered a solid waste when is obtained from the coal mining. However, can be precursor of products like: sulphur, sulphuric acid, hematite, sulphur dioxide, fertilizers and iron sulfates. Several studies also point it property of semiconduction and it use in solar cells. Increase it purity level is important for transforming it in products with more aggregate value. Thus, the present work suggests a purification route for the reduction in soluble salts in water, organics and quartz associated with pyrite from the coal mining beneficiation. The used methods were solubilization in hot water and in organic solvent (dichloromethane). Were applied XRD, FTIR, total sulphur determination, and gas helium picnometry. Comparing the results obtained for the “in nature” pyrite with the purified one, proved the efficiency of the proposed method.

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Optimizing the extraction parameters of epigallocatechin gallate using conventional hot water and ultrasound assisted methods from green tea

Food and Bioproducts Processing ◽

10.1016/j.fbp.2018.06.003 ◽

2018 ◽

Vol 111 ◽

pp. 37-44 ◽

Cited By ~ 8

Author(s):

Sena Saklar Ayyildiz ◽

Bulent Karadeniz ◽

Nihan Sagcan ◽

Banu Bahar ◽

Ahmet Abdullah Us ◽

...

Keyword(s):

Green Tea ◽

Epigallocatechin Gallate ◽

Hot Water ◽

Ultrasound Assisted ◽

Extraction Parameters

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EKSTRAKSI OLEORESIN DARI RIMPANG JAHE DAN BIJI PALA MENGGUNAKAN MICROWAVE

EKUILIBIUM ◽

10.20961/ekuilibrium.v13i1.2142 ◽

2014 ◽

Vol 13 (1) ◽

Author(s):

Yohanes Calasanctius Danarto

Keyword(s):

Organic Solvent ◽

Quality Criteria ◽

Extraction Process ◽

Microwave Extraction ◽

Optimum Yield ◽

Conventional Extraction ◽

Processed Products ◽

Microwave Process

Abstract: Oleoresin is one of refined products from ginger and nutmeg. It is also one of the high economic export commodities compared to other processed products. Oleoresin was produced through conventional extraction process using organic solvent for 2 hours. Microwave as one of the heaters is expected to be another alternative. This study aims to determine the effect of power (watts) and time to yield and comparing the resulting yield between the conventional process and microwave process for the same time. This result shows that the yield of oleoresin produced in the microwave extraction process is greater than the conventional extraction for the same time. This result meets with established quality criteria. The optimum yield of ginger oleoresin obtained at 200 watts power and 25 minutes. While, for nutmeg oleoresin obtained at 300 watts power and 15 minutes. Keywords: ginger, nutmeg, microwave extraction, oleoresin

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Separation of bitumen from oil sands using a switchable hydrophilicity solvent

Canadian Journal of Chemistry ◽

10.1139/v2012-061 ◽

2012 ◽

Vol 90 (10) ◽

pp. 805-810 ◽

Cited By ~ 66

Author(s):

Amy Holland ◽

Dominik Wechsler ◽

Anjali Patel ◽

Brian M. Molloy ◽

Alaina R. Boyd ◽

...

Keyword(s):

Organic Solvent ◽

Energy Cost ◽

Oil Sands ◽

Hot Water ◽

Water Extraction ◽

Low Grade ◽

Carbonated Water ◽

Switchable Hydrophilicity Solvent

Separation of bitumen from oil sands is far more efficient with an organic solvent than with the conventional hot water (Clark) process, but the removal of the organic solvent from the bitumen requires distillation. Distillation is problematic because of the energy cost and the need for a volatile solvent (which is therefore likely to be flammable and smog-forming). A switchable hydrophilicity solvent (SHS) is a solvent that is water-miscible in the presence of an atmosphere of CO2 but separates from water when CO2 is absent. Extraction of bitumen from low-grade high-fines oil sands using a SHS (CyNMe2) is efficient, removing 94%–97% of the bitumen. The resulting solids (sand and clay) are dry, free-flowing, and contaminated with only 0.4 wt % of bitumen and as little as 102 ppm of the solvent. No distillation step was required to recover the solvent from the bitumen. Instead, carbonated water extraction removed the solvent from the oil. Losses of the CyNMe2 solvent were, for the best method, 0.06 grams of solvent per gram of bitumen recovered. The method recovers more oil than the Clark process, produces cleaner solids, works with low-grade high-fines oil sands, and requires neither distillation nor a volatile solvent.

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PEMURNIAN CATECHIN DARI GAMBIR KOTO PANJANG, PESISIR SELATAN

Jurnal Riset Kimia ◽

10.25077/jrk.v5i1.177 ◽

2015 ◽

Vol 5 (1) ◽

pp. 40

Author(s):

Norman Ferdinal

Keyword(s):

Molecular Structure ◽

Melting Point ◽

Organic Solvent ◽

Ethyl Acetate ◽

1H Nmr ◽

13C Nmr ◽

Cold Water ◽

Hot Water ◽

Added Value ◽

Bargaining Position

Vol 5 No 1ABSTRACT The research about catechin purification from gambier was purposed to find its solubility properties in various solvent such as in cold water, hot water, hexane, ethyl acetate, and methanol. By knowing its solubility properties, the easiest way to purify the catechin could be gotten which is yielding about 7.33%. Further, the molecular structure has been gotten by determining its melting point and using spectrophotometric measurements such as UV, IR, 1H NMR, 13C NMR. Based on those measurements, d-cathecin structure with a melting point of 175 - 177 ºC was founded. The expected benefit from this research is it could be benefiting the development of gambier purification industry in order to enhancing added value of West Sumatera’s commodities. It would make Western Sumatera gaining stronger bargaining position due to the capability on selling not only on the crude form to abroad. The result of this research has indicated that catechin purification can be performed using an organic solvent and water. Keywords: Purification, catechin, gambier

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Study on Chemical Compositions of Manihot Esculenta Crantz(M. utilissima Pohl)Stalks

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.236-238.394 ◽

2011 ◽

Vol 236-238 ◽

pp. 394-398 ◽

Cited By ~ 2

Author(s):

Cong Jin Chen ◽

Yue Li ◽

Qiu Ming Su ◽

Li Juan Qu ◽

Dong Chen

Keyword(s):

Organic Solvent ◽

Manihot Esculenta ◽

Cold Water ◽

Sodium Hydroxide Solution ◽

Hot Water ◽

Water Extraction ◽

Hydroxyl Group ◽

Chemical Compositions ◽

Acid Soluble Lignin ◽

Soluble Lignin

The chemical compositions of Manihot esculenta crantz(M. utilissima Pohl)stalks were investigated, the contents of phenolic hydroxyl group and UV spectra of lignin were determined by ultraviolet-visible spectrophotometer. The result showed that the chemical compositions of Manihot esculenta crantz(M. utilissima Pohl)stalks were as follows: ashes 4.97%, cold water extraction 12.04%, hot water extraction 12.57%, 1% sodium hydroxide solution extraction 34.16%, benzene-alcohol solution extraction 4.20%, nitric acid-alcohol cellulose 35.86%, holo-cellulose 72.62%, pentosan 19.20%, acid-soluble lignin 2.51%, acid-insoluble lignin 26.10%, organic solvent-soluble lignin 1.07%, pectin content is 0.02%; it can be used as a non-wood renewable source of natural products.Phenolic hydroxyl content of organic solvent-soluble lignin and acid-insoluble lignin are 1.245 mmol·g-1 and 0.261mmol·g-1 respectively; the maximum absorption wavelength of organic solvent-soluble lignin and acid-soluble lignin in the UV region is near to 205 nm and 280 nm, but shifts to long wavelength or short wavelength with the nature of the different solvents.

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