scholarly journals Antioxidant and antimicrobial activities of fresh garlic and aged garlic by-products extracted with different solvents

2017 ◽  
Vol 27 (1) ◽  
pp. 219-225 ◽  
Author(s):  
Hyun-Joo Jang ◽  
Hyun-Jin Lee ◽  
Dong-Kyu Yoon ◽  
Da-Som Ji ◽  
Ji-Han Kim ◽  
...  
Keyword(s):  
Antimicrobial Activities ◽  
By Products ◽  
Aged Garlic ◽  
Antioxidant And Antimicrobial Activities

scholarly journals Fabrication of Functional Bioelastomer for Food Packaging from Aronia (Aronia melanocarpa) Juice Processing By-Products

Foods ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1565
Author(s):  
Kang Hyun Lee ◽  
Youngsang Chun ◽  
Ye Won Jang ◽  
Soo Kweon Lee ◽  
Hyeong Ryeol Kim ◽  
...  
Keyword(s):  
Food Packaging ◽  
Chemical Properties ◽  
Antimicrobial Activities ◽  
Control Group ◽  
Pdms Film ◽  
Juice Processing ◽  
Aronia Melanocarpa ◽  
Freeze Dried ◽  
By Products ◽  
Antioxidant And Antimicrobial Activities

Carbon-neutral and eco-friendly biomass-based processes are recognized as a frontier technology for sustainable development. In particular, biopolymers are expected to replace petrochemical-based films that are widely used in food packaging. In this study, the fabrication conditions of functional (antioxidant and antibacterial) bioelastomers were investigated using by-products from the juice processing (experimental group) and freeze-dried whole fruit (control group). Bioelastomer was fabricated by a casting method in which polydimethylsiloxane (PDMS) was mixed with 25 or 50 wt% aronia powder (juice processing by-products and freeze-dried whole fruit). The mechanical properties of the bioelastomers were measured based on tensile strength and Young’s modulus. When the mixture contained 50 wt% aronia powder, the strength was not appropriate for the intended purpose. Next, the surface and chemical properties of the bioelastomer were analyzed; the addition of aronia powder did not significantly change these properties when compared to PDMS film (no aronia powder). However, the addition of aronia powder had a significant effect on antioxidant and antimicrobial activities and showed higher activity with 50 wt% than with 25 wt%. In particular, bioelastomers fabricated from aronia juice processing by-products exhibited approximately 1.4-fold lower and 1.5-fold higher antioxidant and antimicrobial activities, respectively, than the control group (bioelastomers fabricated from freeze-dried aronia powder).

scholarly journals Chemical Composition and Biological Activities of Extracts from Pomelo Peel By-Products under Enzyme and Ultrasound-Assisted Extractions

2020 ◽  
Vol 2020 ◽  
pp. 1-7 ◽  
Author(s):  
Pham Van Hung ◽  
Nguyen Hai Yen Nhi ◽  
Ling Yu Ting ◽  
Nguyen Thi Lan Phi
Keyword(s):  
Chemical Composition ◽  
Antimicrobial Activities ◽  
Extraction Time ◽  
Ultrasound Assisted Extraction ◽  
Solid Ratio ◽  
Assisted Extraction ◽  
Ultrasound Assisted ◽  
By Products ◽  
Enzyme Assisted Extraction ◽  
Antioxidant And Antimicrobial Activities

Enzyme-assisted extraction (EAE) and ultrasound-assisted extraction (UAE) were popular methods used to extract bioactive compounds from citrus peels, by-products of fruit processing industry. In this study, the total phenolic content (TPC), total flavonoid content (TFC), naringin and hesperidin contents, and antioxidant and antimicrobial activities of the extracts from pomelo peels using the combined enzyme and ultrasound-assisted extraction (E-UAE) or ultrasound and enzyme-assisted extraction (U-EAE) technique were investigated and compared with those extracted using the EAE and UAE. The optimal EAE conditions were as follows: enzyme concentration of 2%, water-solid ratio of 40 ml/g, incubation temperature of 50°C, and extraction time of 60 min, whereas the optimal UAE conditions were ultrasonic energy of 40 kHz, water-solid ratio of 40 ml/g at room temperature, and extraction time of 60 min. The results indicate that the total phenolics, total flavonoids, naringin, and hesperidin contents of the extracts significantly increased in the following order of the extraction techniques: UAE < EAE < U-EAE < E-UAE (p<0.05). The combined E-UAE technique was the most effective technique for bioactive compound extraction with the highest antioxidant and antimicrobial activities. The results also indicate that chemical composition and antioxidant and antimicrobial activities of the extracts were different depending on the pomelo species.

scholarly journals Valorisation of table tomato crop by-products: Phenolic profiles and in vitro antioxidant and antimicrobial activities

2020 ◽  
Vol 124 ◽  
pp. 307-319 ◽  
Author(s):  
Mikel Añibarro-Ortega ◽  
José Pinela ◽  
Ana Ćirić ◽  
Valter Martins ◽  
Filomena Rocha ◽  
...  
Keyword(s):  
Antimicrobial Activities ◽  
Tomato Crop ◽  
Phenolic Profiles ◽  
By Products ◽  
Antioxidant And Antimicrobial Activities

The antioxidant and antimicrobial activities of methanolic extracts from houseleek (Sempervivum marmoreum L.) leaves

Planta Medica ◽  
2007 ◽  
Vol 73 (09) ◽  
Author(s):  
S Stojièević ◽  
I Stanisavljević ◽  
D Velièković ◽  
V Veljković ◽  
M Lazić
Keyword(s):  
Antimicrobial Activities ◽  
Methanolic Extracts ◽  
Antioxidant And Antimicrobial Activities

scholarly journals Precursor-Boosted Production of Metabolites in Nasturtium officinale Microshoots Grown in Plantform Bioreactors, and Antioxidant and Antimicrobial Activities of Biomass Extracts

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4660
Author(s):  
Marta Klimek-Szczykutowicz ◽  
Michał Dziurka ◽  
Ivica Blažević ◽  
Azra Đulović ◽  
Małgorzata Miazga-Karska ◽  
...  
Keyword(s):  
Photosynthetic Pigments ◽  
Human Fibroblasts ◽  
Antimicrobial Activities ◽  
Precursor Feeding ◽  
Nasturtium Officinale ◽  
Qualitative And Quantitative ◽  
Normal Human ◽  
Inhibition Zones ◽  
Ferulic Acids ◽  
Antioxidant And Antimicrobial Activities

The study demonstrated the effects of precursor feeding on the production of glucosinolates (GSLs), flavonoids, polyphenols, saccharides, and photosynthetic pigments in Nasturtium officinale microshoot cultures grown in Plantform bioreactors. It also evaluated the antioxidant and antimicrobial activities of extracts. L-phenylalanine (Phe) and L-tryptophan (Trp) as precursors were tested at 0.05, 0.1, 0.5, 1.0, and 3.0 mM. They were added at the beginning (day 0) or on day 10 of the culture. Microshoots were harvested after 20 days. Microshoots treated with 3.0 mM Phe (day 0) had the highest total GSL content (269.20 mg/100 g DW). The qualitative and quantitative profiles of the GSLs (UHPLC-DAD-MS/MS) were influenced by precursor feeding. Phe at 3.0 mM stimulated the best production of 4-methoxyglucobrassicin (149.99 mg/100 g DW) and gluconasturtiin (36.17 mg/100 g DW). Total flavonoids increased to a maximum of 1364.38 mg/100 g DW with 3.0 mM Phe (day 0), and polyphenols to a maximum of 1062.76 mg/100 g DW with 3.0 mM Trp (day 0). The precursors also increased the amounts of p-coumaric and ferulic acids, and rutoside, and generally increased the production of active photosynthetic pigments. Antioxidant potential increased the most with 0.1 mM Phe (day 0) (CUPRAC, FRAP), and with 0.5 mM Trp (day 10) (DPPH). The extracts of microshoots treated with 3.0 mM Phe (day 0) showed the most promising bacteriostatic activity against microaerobic Gram-positive acne strains (MIC 250–500 µg/mL, 20–21 mm inhibition zones). No extract was cytotoxic to normal human fibroblasts over the tested concentration range (up to 250 μg/mL).

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