scholarly journals Water–Organic Solvent Extraction of Phenolic Antioxidants from Brewers’ Spent Grain

Processes ◽  
2019 ◽  
Vol 7 (3) ◽  
pp. 126 ◽  
Author(s):  
Antonio Zuorro ◽  
Annalaura Iannone ◽  
Roberto Lavecchia
Keyword(s):  
Antioxidant Activity ◽  
Solvent Extraction ◽  
Organic Solvent ◽  
Animal Feed ◽  
Extraction Procedure ◽  
Extraction Process ◽  
Extraction Yield ◽  
Phenolic Antioxidants ◽  
Brewing Process ◽  
Spent Grain

Brewers’ spent grain (BSG) is the most abundant by-product of the brewing process. BSG is currently disposed of or used as a supplement for animal feed, although it contains significant amounts of bioactive compounds of great interest to the pharmaceutical, cosmetic and food sectors. In this study we investigate the feasibility of using a simple solvent extraction procedure to recover phenolic antioxidants from BSG. Acetone–water and ethanol–water mixtures were used as extraction solvents. Phenolic extracts obtained by treatment of BSG with the two solvent systems were characterized in terms of total phenolics and antioxidant activity. For both systems, the extraction yield was maximum at 60% (v/v) organic solvent concentration. At all solvent compositions, mixtures containing acetone provided higher extraction yields. As suggested by the strong correlation between the antioxidant activity of BSG extracts and their phenolic content, the antioxidant capacity of the extracts can be mainly attributed to polyphenols. Overall, the obtained results strongly support the exploitation of BSG as a source of phenolic antioxidants and the possibility of recovering them by a mild and green extraction process.

scholarly journals Optimization of Ultrasonic Extraction to Obtain Erinacine A and Polyphenols with Antioxidant Activity from the Fungal Biomass of Hericium erinaceus

Foods ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 1889
Author(s):  
Mihai-Vlad Valu ◽  
Liliana Cristina Soare ◽  
Nicoleta Anca Sutan ◽  
Catalin Ducu ◽  
Sorin Moga ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Extraction Procedure ◽  
Natural Antioxidants ◽  
Extraction Process ◽  
Fungal Species ◽  
Extraction Yield ◽  
Ultrasonic Extraction ◽  
Hericium Erinaceus ◽  
High Antioxidant Activity ◽  
Erinacine A

Hericium erinaceus is a medicinal fungal species that produces the active biological metabolite erinacine A with strong antioxidant activity. The classical extraction techniques used to date to obtain metabolites from this fungal species require high consumption of resources and energy and, in the end, prove to be expensive and inefficient, especially on a biomedical scale. The aim of this research is based on the development of an ultrasonic extraction (UE) method for the identification and extraction of biological compounds with high antioxidant activity from the mycelia of H. erinaceus biomass developed through a solid cultivation process. The extraction process was optimized by varying parameters to determine the best extraction yield of metabolites involved in such antioxidant activity, using the response surface methodology (RSM). The physicochemical analyses were oriented towards the investigation of polyphenols, flavonoids, and the diterpenoid erinacine A. It is highlighted that there is a very good mutual connection between the concentration of polyphenols and flavonoids in the extracts studied and the diterpenoid erinacine A. Also, this study describes an efficient and qualitative extraction method for extracting natural antioxidants from the H. erinaceus mushroom, since toxic solvents were not used in the developed extraction procedure. This biomass can be used both as a food source and as a possible phytotherapeutic tool in the prevention or treatment of various neurodegenerative disorders that require drugs with strong antioxidant activity.

Facile fractionation of bamboo hydrolysate and characterization of isolated lignin and lignin-carbohydrate complexes

Holzforschung ◽  
2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Xiaodi Wang ◽  
Yongchao Zhang ◽  
Luyao Wang ◽  
Xiaoju Wang ◽  
Qingxi Hou ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Organic Solvent ◽  
Extraction Process ◽  
Water Soluble ◽  
Organic Solvent Extraction ◽  
Glycoside Linkage ◽  
Potential Applications ◽  
Tremendous Amount ◽  
Main Components ◽  
Hemicellulosic Sugars

AbstractAn efficient separation technology for hydrolysates towards a full valorization of bamboo is still a tough challenge, especially regarding the lignin and lignin-carbohydrate complexes (LCCs). The present study aimed to develop a facile approach using organic solvent extraction for efficiently fractionating the main components of bamboo hydrolysates. The high-purity lignin with only a trace of carbohydrates was first obtained by precipitation of the bamboo hydrolysate. The water-soluble lignin (WSL) fraction was extracted in organic solvent through a three-stage organic solvent extraction process, and the hemicellulosic sugars with increased purity were also collected. Furthermore, a thorough characterization including various NMR techniques (31P, 13C, and 2D-HSQC), GPC, and GC-MS was conducted to the obtained lignin-rich-fractions. It was found that the WSL fraction contained abundant functional groups and tremendous amount of LCC structures. As compared to native LCC of bamboo, the WSL fraction exhibited more typical LCC linkages, i.e. phenyl glycoside linkage, which is the main type of chemical linkage between lignin and carbohydrate in both LCC samples. The results demonstrate that organic phase extraction is a highly efficient protocol for the fractionation of hydrolysate and the isolation of LCC-rich streams possessing great potential applications.

scholarly journals Comparison of five solvents in the extraction of phenolic anti-oxidants from pomegranate (Punica granatum L.) peel

2019 ◽  
Vol 3 (5) ◽  
pp. 140-147
Author(s):  
Abderrezak Kennas ◽  
Hayat Amellal-Chibane
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Content ◽  
Antioxidant Activities ◽  
Punica Granatum ◽  
Extraction Yield ◽  
Total Phenolic ◽  
Phenolic Antioxidants ◽  
Punica Granatum L ◽  
Extracting Solvent ◽  
High Inhibition

Background: Pomegranate peels are rich in bioactive compounds and could be an alternative natural source such as antioxidants. Aims: The aim of the present study was to assess the abilities of five solvents to extract phenolic antioxidants from pomegranate peels. Methods and Material: Pomegranate peels powder was subjected to extraction and the extraction yield was compared. The total phenolic, flavonoid, condensed and hydrolysable tannins contents were analyzed. The antioxidant activity of the extracts was evaluated by two methods (DPPH* and ABTS•+ scavenging capacities) and results were then compared. Results: Results showed that the mixture methanol/water (50:50) allowed higher extraction yield (37.33±5.3%) than the others solvents (P<0.05). Further, the total phenolic, flavonoid and condensed tannins contents were the highest in mixture water/methanol (50:50) extract. Phenolic antioxidants showed a distinct reducing capacity and a high DPPH* inhibition values were recorded for all extracts with no significant differences (P>0.05) between ethanol and mixture water/methanol (50:50) extracts. All extracts exhibited high inhibition against ABTS•+ but with a considerable variation. Phenolic content and antioxidant activities were well positively correlated with each other. Conclusions: Our findings revealed that the choice of the extracting solvent affects considerably the extraction of phenolic antioxidants from pomegranate peels. Keywords: Pomegranate peels, solvent extraction, antioxidant activity, phenolic antioxidants.

scholarly journals Ultrasound-Assisted Deep Eutectic Solvent Extraction of Anthocyanins from Blueberry Wine Residues: Optimization, Identification, and HepG2 Antitumor Activity

Molecules ◽  
2020 ◽  
Vol 25 (22) ◽  
pp. 5456
Author(s):  
Hongkun Xue ◽  
Jiaqi Tan ◽  
Qian Li ◽  
Jintian Tang ◽  
Xu Cai
Keyword(s):  
Solvent Extraction ◽  
Antitumor Activity ◽  
Deep Eutectic Solvent ◽  
Extraction Process ◽  
Ultrasonic Power ◽  
Extraction Temperature ◽  
Brewing Process ◽  
Ultrasound Assisted ◽  
Optimum Extraction ◽  
Better Than

Blueberry wine residues produced during the wine-brewing process contain abundant anthocyanins and other bioactive compounds. To extract anthocyanins from blueberry wine residues more efficiently, a novel procedure of ultrasound-assisted deep eutectic solvent extraction (UADESE) was proposed in this work. The extraction process was optimized by response surface methodology coupled with genetic algorithm. The optimum extraction parameters to achieve the highest yield of anthocyanins (9.32 ± 0.08 mg/g) from blueberry wine residues by UADESE were obtained at water content of 29%, ultrasonic power of 380 W, extraction temperature of 55 °C, and extraction time of 40 min. The AB-8 macroporous resin combined with Sephadex LH-20 techniques was used to purify the crude extract (CE) obtained under optimum extraction conditions and analyze the anthocyanins composition by HPLC-ESI-MS/MS. The cyanidin-3-rutinoside with purity of 92.81% was obtained. The HepG2 antitumor activity of CE was better than that of the purified anthocyanins component. Moreover, CE could increase the intracellular reactive oxygen species levels and the apoptosis, and arrest HepG2 cells in the S phases. These findings provided an effective and feasible method for anthocyanins extraction, and reduced the environmental burden of this waste.

Preparation of a Uranium Conversion Plant’s Nuclear Waste for Final Disposal by Means of Magnetically Assisted Chemical Separation

2013 ◽  
Vol 3 (1) ◽  
pp. 8-18
Author(s):  
Ahad Ghaemi ◽  
Mehdi Maghsudi ◽  
Fatemeh Hanifpour ◽  
Mohammad Samadfam
Keyword(s):  
Nitric Acid ◽  
Solvent Extraction ◽  
Nuclear Waste ◽  
Chemical Separation ◽  
Extraction Process ◽  
Uranium Content ◽  
Extraction Yield ◽  
Solvent Extraction Plant ◽  
Ft Ir ◽  
Co Precipitation

Uranium is separated from the raffinate of Isfahan’s uranium conversion solvent extraction process by means of solvent coated magnetic nanoparticles. These particles were synthesized via chemical co-precipitation and were analyzed by XRD, TEM and TGA methods. The particles’ surface were modified with D2EHPA and analyzed with FT-IR method. The results revealed that 0.5 M nitric acid and 25% w/w D2EHPA on nanoparticles gives the maximum uranium extraction yield. The raffinate of the solvent extraction plant can be disposed safely after its uranium content reduces to the allowable values.

scholarly journals The Effect of Cold Plasma Pretreatment on Water-Suspended Herbs Measured in the Content of Bioactive Compounds, Antioxidant Activity, Volatile Compounds and Microbial Count of Final Extracts

Antioxidants ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1740
Author(s):  
Ewelina Pogorzelska-Nowicka ◽  
Monika Maria Hanula ◽  
Marta Brodowska-Trębacz ◽  
Elżbieta Górska-Horczyczak ◽  
Urszula Jankiewicz ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Plasma Treatment ◽  
Volatile Compounds ◽  
Bioactive Compounds ◽  
Cold Plasma ◽  
New Technology ◽  
Echinacea Purpurea ◽  
Extraction Process ◽  
Extraction Yield ◽  
Microbial Count

Cold plasma is a new technology of promising potential to use as a part of technological extraction lines constructed to implement green chemistry solutions or simply to reduce resources in solvent-based extraction lines. The present study was undertaken to verify the effect of nitrogen cold plasma pre-treatment conducted for 8 min (20 kHz) on the content of antioxidants, antioxidant activity, the profile of volatile compounds, microbial count, pH and color measured in herb extracts (12 herbs: Echinacea purpurea; Salvia officinalis; Urtica dioica; Polygonum aviculare; Vaccinium myrtillus; Taraxacum officinale; Hypericum perforatum; Achillea millefolium; Sanguisorba officinalis; Leonurus cardiaca; Ballota nigra; Andrographis paniculata) obtained with its usage. The surface morphology of extracted herbs was examined as well. Herbs used for extraction were ground and suspended in water before cold plasma treatment, which is a novel approach not studied before. Most plasma-treated extracts were characterized by a higher content of polyphenols (11 out of 12). Content of flavonoids and anthocyanins increased in four extracts and in the case of anthocyanins was significantly higher in comparison to control (up to 77%). The antioxidant activity measured at least by one method (ABTS, DPPH, FRAP) was also higher in nine plasma-treated solutions. Moreover, plasma decreased total aerobic bacteria, affected the color and increased pH of the extracts. The surface structure of the plant material after the extraction process was significantly damaged, which probably led to a higher extraction yield of bioactive compounds and in consequence to the higher antioxidant activity of extracts obtained with the cold plasma treatment.

Effect of Extraction Process on Extraction Yeild, Total Polyphenol Content and Antioxidant Activity of Jasminum Subtriplinerve

2019 ◽  
Vol 814 ◽  
pp. 527-531
Author(s):  
Trieu Tuan Anh ◽  
Luu Tu Hao ◽  
Long Giang Bach ◽  
Duy Chinh Nguyen ◽  
Tri Duc Lam
Keyword(s):  
Antioxidant Activity ◽  
Extraction Process ◽  
Extraction Yield ◽  
Total Phenolic ◽  
Extraction Temperature ◽  
Total Phenolic Compounds ◽  
Polyphenol Content ◽  
Total Polyphenol ◽  
Herbal Plants ◽  
Optimized Conditions

Jasminum Subtriplinerve Blume (Oleaceae) is herbal plants widely a tea for weight loss, stimulates milk glands. Extract product it easy used yet had little research. This study was carried out to evaluate the effect of extracting conditions such as water/material ratio, extraction temperature and extracting time on extracting yield, polyphenol content and antioxidant activity of J.subtriplinerve extract. The total phenolic compounds were determined according to the Folin–Ciocalteu method. Extraction yield (0.22g/100 g) was obtained at water/material ratio 15:1 (ml/g), 40°C and 4 hours extraction time. Under these optimized conditions, the polyphenol content of was 2640.4 μg/1g extract. And the extract can harvest 46.11 % of DPPH (30 μg/ mL) at 10 000 μg/ml concentration

Preparation of a Uranium Conversion Plant’s Nuclear Waste for Final Disposal by Means of Magnetically Assisted Chemical Separation

2014 ◽  
pp. 1483-1493
Author(s):  
Ahad Ghaemi ◽  
Mehdi Maghsudi ◽  
Fatemeh Hanifpour ◽  
Mohammad Samadfam
Keyword(s):  
Nitric Acid ◽  
Solvent Extraction ◽  
Nuclear Waste ◽  
Chemical Separation ◽  
Extraction Process ◽  
Uranium Content ◽  
Extraction Yield ◽  
Solvent Extraction Plant ◽  
Ft Ir ◽  
Co Precipitation

Uranium is separated from the raffinate of Isfahan’s uranium conversion solvent extraction process by means of solvent coated magnetic nanoparticles. These particles were synthesized via chemical co-precipitation and were analyzed by XRD, TEM and TGA methods. The particles’ surface were modified with D2EHPA and analyzed with FT-IR method. The results revealed that 0.5 M nitric acid and 25% w/w D2EHPA on nanoparticles gives the maximum uranium extraction yield. The raffinate of the solvent extraction plant can be disposed safely after its uranium content reduces to the allowable values.

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