Optimization of microwave-assisted extraction of total polyphenolic compounds from chokeberries by response surface methodology and artificial neural network

Polyphenols extraction from plant sources

“…However, higher quantities of water lead to a reduced expanding of heat into extraction medium, which also reduces the efficiency of microwave extraction (Milutinović et al, 2015). Additionally, the highest content of polyphenols from A. melanocarpa was achieved by using 50% ethanol, whereas further increase of ethanol concentration led to the decrease of polyphenols yield (Simić et al, 2016). Milutinović et al (2015) have shown that in microwave-assisted extraction, the increase in solid/solvent ratio resulted in the enhancement of polyphenols content from A. millefolium, due to more efficient wetting of plant material.…”

“…According to the literature data, high power of microwaves during short extraction time can ensure the degradation of cell wall and better diffusion of polyphenols into extraction medium. Apart from that, longer time and better yields of microwave extractions do not mean a large quantity of target compounds, because microwaves cause the release of a large amount of ballast substances, such as lipids, proteins and polysaccharides (Simić et al, 2016). The main advantages of microwave-assisted extraction: (1) significant reduction of extraction time, (2) reduction of solvent consumption, (3) increased extraction yield, and (4) simplicity and economy of the extraction process, in comparison to other novel extraction procedures, such as supercritical fluid extraction.…”

“…The disadvantages of microwave-assisted extraction include (1) degradation of thermosensitive polyphenols constituents, (2) lower yield of non-polar and volatile target compounds, (3) the effects of microwaves on polyphenols yield depend on the polarity of solvents, and (4) a possibility of the extraction of a large quantity of ballast substances. Microwave-assisted extraction is widely and successfully applied technique for obtaining polyphenols extracts from different plant matrixes, such as chokeberry fruit and yarrow, myrtle and sea buckthorn leaves (Asofiei et al, 2016;Milutinović et al, 2015;Simić et al, 2016;Dandena et al, 2014). From the point of view of environmental protection and food, pharmaceutical and cosmetic industries, which require safe and high quality products, with the application of "green" extraction methods, which are quick and automated, microwave-assisted extraction is a recommended method for obtaining high quality extracts from numerous plant sources, with high polyphenols yield (Bouras et al, 2015).…”

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

“…MAE is an improved extraction method with high efficiency with regard to duration time and environmental friendliness (Wang and Weller 2006). Microwave heating is also effective for the extraction of alkaloids (Ganzler et al 1990), terpenes (Carro et al 1997), polynuclear aromatic hydrocarbons (Tomaniová et al 1998), and phenolic compounds (Spigno and De Faveri 2009;Dahmoune 2014;Simić et al 2016, Krishnan et al 2016.…”

Ultrasound–assisted extraction optimization of phenolic compounds from Psidium guajava L. using artificial neural network-genetic algorithm

“…ANN is a computational system for nonlinear multivariate modeling, which is able to estimate the response based on train data [16]. In this study, the phenolic compounds of guava leaves (Psidium guajava L.) has been successfully predicted using ANN through LM-backpropagation.…”