scholarly journals Effects of Temperature and Extraction Time on Avocado Flesh (Persea americana) Total Phenolic Yields Using Subcritical Water Extraction

Processes ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 159
Author(s):  
Walid I. Mazyan ◽  
Ellen O’Connor ◽  
Elia Martin ◽  
Anja Vogt ◽  
Edward Charter ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Subcritical Water ◽  
Persea Americana ◽  
Water Extraction ◽  
Extraction Time ◽  
Total Phenolic ◽  
Extraction Temperature ◽  
Subcritical Water Extraction ◽  
Two Samples ◽  
The Impact

This paper investigates the optimum extraction temperature for enhanced total phenolic yields extracted from avocado fruit flesh (Persea americana) using subcritical water extraction, as well as the impact of fruit ripeness on phenol extraction efficiency. Additionally, extraction yield against extraction time was investigated for time intervals of 10 min over an overall extraction time of 30 min. The subcritical water conditions studied were 18 bar, 87 mL/min, and temperatures of 105 °C, 120 °C, and 140 °C. The total phenolic compounds content was compared for week one avocado flesh and ripe (week four) avocado flesh, with a four-week ripening period between the two samples. The results show that extracting with subcritical water at 105 °C provides the highest phenolic compounds yields of 0.11% and 0.26% by dried mass for week one and ripe fruit (week four), respectively. The experimental results also indicate that the implementation of lower extraction temperatures on week four avocado (i.e., following the selection of week one avocados and allowing them to ripen over a period of one month) enhances the phenolic compounds extraction yields by more than four times relative to the first week’s sample extract, specifically during the first 20 min of extraction.

scholarly journals Subcritical Water Extraction of Antioxidants from Curculigo latifolia Root

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Nur Athirah Zabidi ◽  
Nur Akmal Ishak ◽  
Muhajir Hamid ◽  
Siti Efliza Ashari
Keyword(s):  
Phenolic Compounds ◽  
Subcritical Water ◽  
Extraction Yield ◽  
Water Extraction ◽  
Total Phenolic ◽  
Antioxidant Compounds ◽  
Root Extract ◽  
Extraction Temperature ◽  
Subcritical Water Extraction ◽  
Trolox Equivalent

This study aims to extract antioxidant compounds from Curculigo latifolia root by subcritical water extraction (SWE). The influence of extraction temperature and time on the antioxidant activity of C. latifolia root extract was investigated in terms of extraction yield, total phenolic content (TPC), total flavonoid content (TFC), 2, 2′-azino-bis-3-ethylbenzothiazoline-6-sulphonic acid (ABTS), and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical. The highest extraction yield (36.5%), TPC (92.55 mg GAE/g), TFC (13.26 mg RE/g), and antioxidant activities by ABTS (66.8 mg trolox equivalent/g sample) and DPPH (128.7 mg trolox equivalent/g sample) were detected at 180°C and 30 minutes extraction time. Based on the results, the optimum condition was selected at 180°C and 30 minutes of extraction. The sample was screened by using liquid chromatography-mass spectrometry (LC-MS) analysis where the phenolic compounds detected were structured based on their [M-H]-peak. The detected phenolic compounds were monobenzone, hydroquinone, phloridzin, pomiferin, mundulone, scandenin, and dimethyl caffeic acid. According to these findings, SWE is a promising, environmentally friendly, and efficient technology in the exploitation of natural products for the development of food and nutraceutical commodities.

Study on Subcritical Water Extraction of Flavonoids from Scutellaria baicalenses

2013 ◽  
Vol 662 ◽  
pp. 293-296 ◽  
Author(s):  
Yan Cheng ◽  
Jing Liu ◽  
Chang An Liu
Keyword(s):  
Subcritical Water ◽  
Extraction Yield ◽  
Water Extraction ◽  
Extraction Time ◽  
Particle Sizes ◽  
Extraction Temperature ◽  
Subcritical Water Extraction ◽  
Operation Conditions ◽  
Conventional Extraction ◽  
Total Extraction

The extraction of baicalin, baicalein, wogonin and wogonoside from Scutellaria Baicalenses was performed using subcritical water. The effects of key operation conditions by varying the temperature (110-160 °C), extraction time (10-90 min), water loadings (2.0-4.0 mL)and particle sizes (>20- <100 mesh) were evaluated. The highest extraction yields of baicalin and wogonoside were obtained at extraction temperature of 160 °C, extraction time of 60 min, water loadings of 4.0 mL and 60-100 mesh. The highest extraction yields of baicalein and wogonin were obtained at extraction temperature of 110 °C, extraction time of 10 min, water loadings of 4.0 mL and 60-100 mesh. The subcritical water extraction was compared with the conventional extraction method. The total extraction yield by SCWE was higher than those obtained using ethanol as the solvent.

scholarly journals Subcritical water extraction of flavoring and phenolic compounds from cinnamon bark (Cinnamomum zeylanicum)

2012 ◽  
Vol 61 (6) ◽  
pp. 349-355 ◽  
Author(s):  
Pramote Khuwijitjaru ◽  
Nucha Sayputikasikorn ◽  
Suched Samuhasaneetoo ◽  
Parinda Penroj ◽  
Prasong Siriwongwilaichat ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Subcritical Water ◽  
Water Extraction ◽  
Subcritical Water Extraction ◽  
Cinnamomum Zeylanicum ◽  
Cinnamon Bark

scholarly journals Subcritical Water Extraction of Low-molecular-weight Phenolic Compounds from Oil Palm Biomass

2014 ◽  
Vol 48 (3) ◽  
pp. 355-362 ◽  
Author(s):  
Fumio KAWAMURA ◽  
Nur Syahirah SAARY ◽  
Rokiah HASHIM ◽  
Othman SULAIMAN ◽  
Koh HASHIDA ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Phenolic Compounds ◽  
Oil Palm ◽  
Subcritical Water ◽  
Water Extraction ◽  
Low Molecular Weight ◽  
Subcritical Water Extraction ◽  
Oil Palm Biomass

scholarly journals Thermal Processing Effects on the Chemical Constituent and Antioxidant Activity of Okara Extracts Using Subcritical Water Extraction

2018 ◽  
Vol 2018 ◽  
pp. 1-8
Author(s):  
Hongyi Sun ◽  
Xi Yuan ◽  
Zhenya Zhang ◽  
Xin Su ◽  
Min Shi
Keyword(s):  
Antioxidant Activity ◽  
Thermal Processing ◽  
Subcritical Water ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Water Extraction ◽  
Total Phenolic ◽  
Scavenging Activity ◽  
Flavonoid Content ◽  
Subcritical Water Extraction

Subcritical water extraction (SWE) has been employed for the extraction of bioactive compounds from plant materials with cost-effectiveness, less consuming time, and environmental sustainability. To explore the effects of thermal processing during SWE, total organic content (TOC), total sugar, polysaccharides, total phenolic content (TPC), total flavonoid content (TFC), and antioxidant activity (ABTS and DPPH assays) of eight aqueous extracts have been quantitatively investigated. The results indicated that elevated temperatures indeed resulted in significant changes in the constituents and antioxidant activities of okara extracts. Among them, the extract obtained at 220°C exhibited the highest total phenolic, flavonoid content, DPPH (2,2-diphenyl-1-picrylhydrazyl) radical-scavenging activity, and ABTS [2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonate)] radical-scavenging activity. However, phenolic compounds were destroyed after the treatment above 230°C, suggesting that any polymer processing is improper to undertake at higher than this value to achieve the high antioxidant activity. Moreover, a significant positive correlation between TPC or TFC and antioxidant capacity (DPPH and ABTS) values was detected.

Valorization of peach palm by-product through subcritical water extraction of soluble sugars and phenolic compounds

2020 ◽  
Vol 165 ◽  
pp. 104985 ◽  
Author(s):  
Cristiane Giombelli ◽  
Isabela Julio Iwassa ◽  
Camila da Silva ◽  
Beatriz Cervejeira Bolanho Barros
Keyword(s):  
Phenolic Compounds ◽  
Subcritical Water ◽  
Soluble Sugars ◽  
Water Extraction ◽  
Subcritical Water Extraction ◽  
Peach Palm
Sign in / Sign up

Export Citation Format

Share Document