scholarly journals Biological Activities and Extraction Technologies of Pheonix dactylifera: A Review

2019 ◽  
Vol 9 (1) ◽  
pp. 3-13 ◽  
Author(s):  
Nurfatin Nazirah Hamzah ◽  
Sahena Ferdosh ◽  
Md. Zaidul Islam Sarker ◽  
Kashif Ghafoor ◽  
Kamaruzzaman Yunus ◽  
...  
Keyword(s):  
Date Palm ◽  
Biological Activities ◽  
Extraction Yield ◽  
Future Research ◽  
Extraction Technology ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Anti Cancer ◽  
Medical Benefits ◽  
Therapeutic Properties

Date palm (Pheonix dactylifera L.) has long been known for its medical benefits. In this review, the therapeutic properties of P. dactylifera are presented in light of the analysis of huge past reviews that reported the bioactivities of both flesh and seed of this fruit. The reported bioactivities of P. dactylifera included antioxidants, anti-cancer, aphrodisiac, antimicrobial, and anti-diabetic properties. This review additionally highlights the extraction technologies (Soxhlet, maceration, heat under reflux, Supercritical Fluid Extraction (SFE) and microwave assisted extraction) that were utilized as part of the extraction of P. dactylifera. This is because the quality and amount of the extraction yield depend on the extraction technology used. Accordingly, this review aims for underlining the potentials of P. dactylifera by compiling available data on the bioactivities and extraction technologies used to set the directions for the improvement of future research of this fruit.

scholarly journals Microwave-assisted extraction of flavonoids from Phyllostachys heterocycla leaves: Optimization, mechanism, and antioxidant activity in vitro

BioResources ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. 8060-8081
Author(s):  
Jie Xu ◽  
Jianjun Wu ◽  
Juan Qi ◽  
Juan Li ◽  
Yongju Liu ◽  
...  
Keyword(s):  
Antioxidant Activities ◽  
Radical Scavenging ◽  
Soxhlet Extraction ◽  
Extraction Yield ◽  
Microwave Assisted Extraction ◽  
Extraction Technology ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Phyllostachys Heterocycla

Flavonoids were extracted from Phyllostachys heterocycla leaves by adopting microwave-assisted extraction technology. Based on the single factor experiment and Plackett-Burman design results, the extraction process of flavonoids was further optimized using the response surface methodology. The optimum conditions were as follows: an ethanol concentration of 78.1%, an extraction time of 24.9 min, and a microwave power of 559 W. Under these conditions, the extraction yield of flavonoids was 4.67%, which was in close proximity to the predicted value (4.70%) and higher than the extraction yield from traditional Soxhlet extraction (3.35%). Moreover, the possible extraction mechanisms of these two extraction methods were further derived to explain why the microwave-assisted extraction of flavonoids was more efficient compared with traditional Soxhlet extraction. Ultimately, the antioxidant activities in vitro of flavonoids from Phyllostachys heterocycla leaves were evaluated via DPPH and ABTS radical scavenging assay. The flavonoids from Phyllostachys heterocycla leaves exhibited excellent antioxidant activities in vitro and Phyllostachys heterocycla leaves could be a new natural source for developing antioxidants. Overall, the findings of this research could provide a theoretical reference for the further comprehensive development and utilization of bamboo resources.

scholarly journals Deep Eutectic Solvent-Based Microwave-Assisted Extraction of Baicalin from Scutellaria baicalensis Georgi

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Hui Wang ◽  
Xiaodi Ma ◽  
Qibin Cheng ◽  
Xiaoli Xi ◽  
Liwei Zhang
Keyword(s):  
Maximum Yield ◽  
Deep Eutectic Solvent ◽  
Extraction Yield ◽  
Scutellaria Baicalensis ◽  
Molar Ratio ◽  
Extraction Temperature ◽  
Microwave Assisted Extraction ◽  
Scutellaria Baicalensis Georgi ◽  
Microwave Assisted ◽  
Assisted Extraction

Deep eutectic solvents (DESs) have attracted significant attention as green media for the extraction and separation of natural compounds from Chinese medicine. In this study, a hydrophobic DESs-based microwave-assisted extraction (MAE) was successfully used to efficiently extract baicalin from Scutellaria baicalensis Georgi. Firstly, DecA: N4444-Cl (DES-1 , molar ratio 1 : 2) was screened and selected as the most appropriate DES by comparing the extraction yield in different hydrophobic DESs. Based on the extraction yield of baicalin, response surface methodology (RSM) was employed to model and optimize the parameters (extraction temperature, liquid-solid ratio, and extraction time). Furthermore, the maximum yield of 106.96 mg·g−1 was achieved under optimum conditions in DES-containing aqueous solutions (33 vol% water content), which reached a similar level that was conducted using the pharmacopoeia procedure (104.94 mg·g−1). These results indicated that the proposed method is an excellent alternative for the extraction of baicalin.

scholarly journals Optimization of Microwave-Assisted Extraction of Residual Soybean Oil from Spent Bleaching Earth

2021 ◽  
Vol 302 ◽  
pp. 01009
Author(s):  
Chanatip Dejkajorn ◽  
Panawan Suttiarporn ◽  
Hussanai Sukkathanyawat ◽  
Kittisak Wichianwat ◽  
Saichon Sriphan ◽  
...  
Keyword(s):  
Soybean Oil ◽  
Vegetable Oil ◽  
Regression Coefficient ◽  
Bleaching Earth ◽  
Extraction Yield ◽  
Microwave Assisted Extraction ◽  
Ethanol Mixture ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Edible Vegetable Oil

Spent bleaching earth (SBE) which is generated from bleaching process is a valuable industrial waste of edible vegetable oil production because of residual edible vegetable oil absorbed. The residual oil in spent bleaching earth can be recovered and reused for application in the industries such as the production of biodiesel and lubricant. Currently, microwave-assisted extraction (MAE) technique is widely used because this method has a shorter extraction time and less solvent consumption when compared with traditional methods. In this study, MAE combined with solvent reflux was optimized using solvent screening experiments and response surface methodology (RSM) to obtain the highest yield of MAE extraction of residual soybean oil from spent bleaching earth. The extraction yield of residual soybean oil obtained from selected solvent were hexane-ethanol mixture (2:1 v/v, 10.19%) > hexane-ethanol mixture (1:1 v/v, 10.00%) >hexane-ethanol mixture (1:2 v/v, 9.98%) > hexane-ethanol mixture (1:3 v/v, 9.83%) > hexane-ethanol mixture (3:1 v/v, 8.59%) > hexane (8.17%) > acetone (7.73%). The regression coefficient (R-squared = 0.9852) expresses the accuracy of the regression and indicates the relationship between experimental data and predicted result, with high regression coefficient close to 1, which is remarkably desired. The experiment conditions for optimal MAE extraction of residual soybean oil from SBE were hexane-ethanol mixture (2:1 v/v), liquid to solid ratio 15.56:1 mL/g, extraction time 12.22 min, and microwave power 350 W. Under such conditions, the highest predicted value of the extraction yield of residual soybean oil was 10.43%.

scholarly journals Advance on the preparation, physiological function and nanocarriers of resveratrol

2021 ◽  
Vol 233 ◽  
pp. 02047
Author(s):  
Lingyi Li
Keyword(s):  
Research Direction ◽  
Antioxidant Property ◽  
Future Research ◽  
Extraction Technology ◽  
Hydrolysis Method ◽  
Assisted Extraction ◽  
Carbon Dioxide Extraction ◽  
Ultrasonic Assisted ◽  
Ultrasonic Assisted Extraction ◽  
Further Development

Resveratrol is a natural compound that has many beneficial physiological functions. In recent years, the research on resveratrol has gradually become a hotspot. This article summarized the literature reports all over the world, classified and concluded the extraction technology, function and nano-delivery carriers of resveratrol. Solvent extraction, microwave-and ultrasonic-assisted extraction, supercritical carbon dioxide extraction and enzymatic hydrolysis method were respectively discussed in detail. Then the antioxidant property, antibacterial activity, antiumor effect and the prevention of cardiovascular disease of resveratrol were also discussed. Finally, the resveratrol-loaded nanocarriers, such as nanoparticles, nanoemulsions, solid lipid particles and nanosuspensions were summarized. And the future research direction of resveratrol were prospected, in order to provide references and orientations for the further development and research of resveratrol.

scholarly journals Study on microwave assisted extraction of chrysophanol and its intervention in biofilm formation of Streptococcus suis

RSC Advances ◽  
2019 ◽  
Vol 9 (50) ◽  
pp. 28996-29004
Author(s):  
Jing-Wen Bai ◽  
Xing-Ru Chen ◽  
Yang Tang ◽  
Wen-Qiang Cui ◽  
Da-Long Li ◽  
...  
Keyword(s):  
Biofilm Formation ◽  
Streptococcus Suis ◽  
Microwave Assisted Extraction ◽  
Extraction Technology ◽  
Microwave Assisted ◽  
Assisted Extraction

A microwave assisted extraction technology was used to extract chrysophanol from rhubarb.

scholarly journals Emerging Technologies for the Extraction of Marine Phenolics: Opportunities and Challenges

Marine Drugs ◽  
2020 ◽  
Vol 18 (8) ◽  
pp. 389 ◽  
Author(s):  
Adane Tilahun Getachew ◽  
Charlotte Jacobsen ◽  
Susan Løvstad Holdt
Keyword(s):  
Phenolic Compounds ◽  
Secondary Metabolites ◽  
Organic Solvents ◽  
Emerging Technologies ◽  
Biological Activities ◽  
Extraction Yield ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Challenging Environment ◽  
Pharmaceutical Industries

Natural phenolic compounds are important classes of plant, microorganism, and algal secondary metabolites. They have well-documented beneficial biological activities. The marine environment is less explored than other environments but have huge potential for the discovery of new unique compounds with potential applications in, e.g., food, cosmetics, and pharmaceutical industries. To survive in a very harsh and challenging environment, marine organisms like several seaweed (macroalgae) species produce and accumulate several secondary metabolites, including marine phenolics in the cells. Traditionally, these compounds were extracted from their sample matrix using organic solvents. This conventional extraction method had several drawbacks such as a long extraction time, low extraction yield, co-extraction of other compounds, and usage of a huge volume of one or more organic solvents, which consequently results in environmental pollution. To mitigate these drawbacks, newly emerging technologies, such as enzyme-assisted extraction (EAE), microwave-assisted extraction (MAE), ultrasound-assisted extraction (UAE), pressurized liquid extraction (PLE), and supercritical fluid extraction (SFE) have received huge interest from researchers around the world. Therefore, in this review, the most recent and emerging technologies are discussed for the extraction of marine phenolic compounds of interest for their antioxidant and other bioactivity in, e.g., cosmetic and food industry. Moreover, the opportunities and the bottleneck for upscaling of these technologies are also presented.

scholarly journals Optimization of Microwave-Assisted Extraction of Polysaccharides from Ulva pertusa and Evaluation of Their Antioxidant Activity

Antioxidants ◽  
2019 ◽  
Vol 8 (5) ◽  
pp. 129 ◽  
Author(s):  
Bao Le ◽  
Kirill S. Golokhvast ◽  
Seung Hwan Yang ◽  
Sangmi Sun
Keyword(s):  
Antioxidant Activity ◽  
Superoxide Dismutase ◽  
Raw Material ◽  
Ulva Pertusa ◽  
Extraction Time ◽  
Oxidative Enzymes ◽  
Microwave Assisted Extraction ◽  
Extraction Technology ◽  
Microwave Assisted ◽  
Assisted Extraction

The use of green marine seaweed Ulva spp. as foods, feed supplements, and functional ingredients has gained increasing interest. Microwave-assisted extraction technology was employed to improve the extraction yield and composition of Ulva pertusa polysaccharides. The antioxidant activity of ulvan was also evaluated. The impacts of four independent variables, i.e., extraction time (X1, 30 to 60 min), power (X2, 500 to 700 W), water-to-raw-material ratio (X3, 40 to 70), and pH (X4, 5 to 7) were evaluated. The chemical structure of different polysaccharides fractions was investigated via FT-IR and the determination of their antioxidant activities. A response surface methodology based on a Box–Behnken design (BBD) was used to optimize the extraction conditions as follows: extraction time of 43.63 min, power level of 600 W, water-to-raw-material ratio of 55.45, pH of 6.57, and maximum yield of 41.91%, with a desired value of 0.381. Ulvan exerted a strong antioxidant effect against 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2,2’-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) and showed reducing power in vitro. Ulvan protected RAW 264.7 cells against H2O2-induced oxidative stress by upregulating the expression and enhancing the activity of oxidative enzymes such as superoxide dismutase (SOD) and superoxide dismutase (CAT). The results suggest that the polysaccharides from U. pertusa might be promising bioactive compounds for commercial use.

A Comparison Study on Microwave-Assisted Extraction of Catalpol from Rehmannia glutinosa Libosch with Conventional Methods

2014 ◽  
Vol 1033-1034 ◽  
pp. 329-336
Author(s):  
Xiu Li Zhang ◽  
Chun Li Li ◽  
Xue Yin ◽  
Xin Yun Su ◽  
De Hong Yu
Keyword(s):  
Soxhlet Extraction ◽  
Ultrasonic Extraction ◽  
Microwave Assisted Extraction ◽  
Rehmannia Glutinosa ◽  
Extraction Technology ◽  
Considerable Saving ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Percentage Extraction ◽  
Rehmannia Glutinosa Libosch

Catalpol, an iridoid glycoside, has been verified to be of neuroprotection and may be a potential agent for the treatment of neurodegenerative disease. The extraction technology of catalpol has been tested in this paper. We used different extraction methods including extraction at room temperature (ERT), heat reflux extraction, Soxhlet extraction, ultrasonic extraction and microwave-assisted extraction (MAE) to evaluat the percentage extraction of catapol fromRehmannia glutinosa Libosch.The extracts were analyzed by high performance liquid chromatography (HPLC). Methanol (100%, v/v) extracted high percentage extraction of catapol compared to ethanol (60%, v/v) which achieved the highest percentage extraction of catapol in different concentration of ethanol. The results showed that the percentage extraction of catalpol fromRehmannia glutinosa Liboschby MAE was more efficient in short time followed by ultrasonic extraction, Soxhlet extraction, heat reflux extraction and ERT methods. MAE has need of 4 min, whereas ultrasonic extraction, Soxhlet extraction, heat reflux extraction and ERT techniques require 70, 140, 180 min and 60 h respectively, to leach higher percentage extraction of catalpol. The time taken by MAE was nearly 18 times less than the ultrasonic extraction, 35 times less than Soxhlet extraction, 45 times less than heat reflux extraction and 900 times less than ERT for the highest percentage extraction of catalpol. The present results showed that the high extraction efficiency and considerable saving of time by MAE were more competent than the conventional extraction techniques.

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