Supercritical fluid extraction of four aromatic herbs and assessment of the volatile compositions, bioactive compounds, antibacterial, and anti-biofilm activity

Al‐Maqtari, Qais Ali; Al‐Ansi, Waleed; Mahdi, Amer Ali; Al-Gheethi, Adel; Mushtaq, Bilal Sajid; Al‐Adeeb, Abdulqader; Wei, Minping; Yao, Weirong

doi:10.1007/s11356-021-12346-6

Cited by 27 publications

(6 citation statements)

References 64 publications

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“…Few studies have reported extraction by supercritical CO 2 technology [6], which is an environmentally friendly technique used by de Silva et al [9] for the extraction of bioactive substances from pomegranate peel. CO 2 is one of the most popular solvents because it is non-toxic, cheap, readily available and generally recognized as safe (GRAS) [10,11]. The extract was found to be rich in phenolic substances, mainly in ellagitannins, as well as the high content of lipophilic compounds, such as tocopherols and β-carotene [9].…”

Section: Introductionmentioning

confidence: 99%

Polyethylene Films Coated with Antibacterial and Antiviral Layers Based on CO2 Extracts of Raspberry Seeds, of Pomegranate Seeds and of Rosemary

et al. 2021

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The main goal of the work was to create an internal coating based on super critical CO2 extracts of raspberry seeds, pomegranate seeds and rosemary that could be active against chosen bacterial strains. Additionally, the synergistic effect of these substances in the coating were then analysed. The next goal of the work was to demonstrate the antiviral activity of the coatings against phi6 bacteriophage particles (airborne viruses surrogate). The results of the study indicated that three coatings containing a mixture of extracts showed bacteriolytic activity against S. aureus cells and bacteriostatic activity against E. coli and B. subtilis strains. Two coatings showed bacteriolytic activity against a P. syringae strain. As a result of the experiments, a synergistic effect was noted in the active additives/compounds in the coatings. These coatings may be used as internal coatings for packaging films to extend the shelf life of selected food products. All seven coatings may also be used as external coatings with antiviral activity, as these coatings demonstrated significant effects on the phi6 phage, selected as a surrogate for airborne viruses, e.g., coronaviruses. It could be concluded that coatings I–VII will also show antiviral effects on SARS-CoV-2 particles.

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Section: Introductionmentioning

confidence: 99%

Polyethylene Films Coated with Antibacterial and Antiviral Layers Based on CO2 Extracts of Raspberry Seeds, of Pomegranate Seeds and of Rosemary

et al. 2021

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“…In contrast, for the extraction of highly polar compounds, polar solvents such as alcohols, esters, and ketones are usually added to change the polarity of CO 2 to improve the extraction efficiency of polar compounds (Brondz, 2017; Tyśkiewicz et al, 2018; Veggi et al, 2011). Al‐Maqtari et al (2021) reported that adding 10% ethanol in the process of using SFE to extract plants is beneficial to improve the extraction efficiency of antibacterial ingredients.…”

Section: Sample Preparationmentioning

confidence: 99%

Characterization of effective phytochemicals in traditional Chinese medicine by mass spectrometry

Chen

et al. 2022

Mass Spectrometry Reviews

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Traditional Chinese medicines (TCMs) have been widely used in clinical and healthcare applications around the world. The characterization of the phytochemical components in TCMs is very important for studying the therapeutic mechanism of TCMs. In the analysis process, sample preparation and instrument analysis are key steps to improve analysis performance and accuracy. In recent years, chromatography combined with mass spectrometry (MS) has been widely used for the separation and detection of trace components in complex TCM samples. This article reviews various sample preparation techniques and chromatography‐MS techniques, including the application of gas chromatography‐MS and liquid chromatography‐MS and other MS techniques in the characterization of phytochemicals in TCM materials and Chinese medicine products. This article also describes a new ambient ionization MS method for rapid and high‐throughput analysis of TCM components.

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“…Enzymes have become widely popular in industry due to their outstanding substrate selectivity and ability to catalyse very specific reactions, thereby minimising the generation of unwanted by‐products. [ 1 , 2 ] However, they are not perfect in this regard, and in the context of carbohydrate metabolism, evolution of enzymes that catalyse more than one reaction in the degradation of complex plant materials can be advantageous. Hence, enzymes are known that catalyse reactions other than their main activity as well as accept different substrates.…”

Section: Introductionmentioning

confidence: 99%

“…Carbohydrate active enzymes are widespread in the food, feed and pharma industries. [2] Many interesting candidates can be found in the glycoside hydrolase family 5 (GH5), which is characterised by a wide range of members all hydrolysing β‐linked oligosaccharides, polysaccharides and glycoconjugates. The recently established subfamily 34 (GH5_34) comprises arabinoxylanases, which are active on the β‐1,4 glycosidic linkage between two xylopyranose (Xyl p ) units of which one is α‐1,3‐linked to an arabinofuranosyl unit (Ara f ).…”

Section: Introductionmentioning

confidence: 99%

Novel Function of CtXyn5A from Acetivibrio thermocellus: Dual Arabinoxylanase and Feruloyl Esterase Activity in the Same Active Site**

et al. 2022

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Enzymes' uncharacterised side activities can have significant effects on reaction products and yields. Hence, their identification and characterisation are crucial for the development of successful reaction systems. Here, we report the presence of feruloyl esterase activity in CtXyn5A from Acetivibrio thermocellus, besides its well-known arabinoxylanase activity, for the first time. Activity analysis of enzyme variants mutated in the catalytic nucleophile, Glu279, confirmed removal of all activity for E279A and E279L, and increased esterase activity while removing xylanase activity for E279S, thus allowing the proposal that both reaction types are catalysed in the same active site in two subsequential steps. The ferulic acid substituent is cleaved off first, followed by hydrolysis of the xylan backbone. The esterase activity on complex carbohydrates was found to be higher than that of a designated ferulic acid esterase (E-FAERU). Therefore, we conclude that the enzyme exhibits a dual function rather than an esterase side activity.

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Supercritical fluid extraction of four aromatic herbs and assessment of the volatile compositions, bioactive compounds, antibacterial, and anti-biofilm activity

Cited by 27 publications

References 64 publications

Polyethylene Films Coated with Antibacterial and Antiviral Layers Based on CO2 Extracts of Raspberry Seeds, of Pomegranate Seeds and of Rosemary

Polyethylene Films Coated with Antibacterial and Antiviral Layers Based on CO2 Extracts of Raspberry Seeds, of Pomegranate Seeds and of Rosemary

Characterization of effective phytochemicals in traditional Chinese medicine by mass spectrometry

Novel Function of CtXyn5A from Acetivibrio thermocellus: Dual Arabinoxylanase and Feruloyl Esterase Activity in the Same Active Site**

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