scholarly journals Antioxidant Activity and Flavonoid Content of Welsh Onion (Allium fistulosum) and the Effect of Thermal Treatment

2007 ◽  
Vol 13 (1) ◽  
pp. 67-72 ◽  
Author(s):  
Sakiko AOYAMA ◽  
Yukiko YAMAMOTO
Keyword(s):  
Antioxidant Activity ◽  
Thermal Treatment ◽  
Allium Fistulosum ◽  
Flavonoid Content ◽  
Welsh Onion

scholarly journals Flavonoids from the Red Leaf Sheaths of Allium fistulosum ‘Hitachi-benikko’ (Ibaraki’s Specialty Red Welsh Onion Cultivar) and Their Antioxidant Activity

2020 ◽  
Vol 19 (3) ◽  
pp. 237-245
Author(s):  
Takayuki Mizuno ◽  
Risa Nakane ◽  
Takashi Kaidzuka ◽  
Yuko Ishikawa-Takano ◽  
Fumi Tatsuzawa ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Allium Fistulosum ◽  
Welsh Onion ◽  
Onion Cultivar

Uşak İli’nden Toplanan Taxus Baccata (L) Türünün Metanol Ekstresinin Yaprak, Dal ve Meyvesinde Biyolojik Aktivitenin Belirlenmesi

2019 ◽  
Vol 7 (10) ◽  
pp. 1533
Author(s):  
Yasemin Karafakıoglu
Keyword(s):  
Antioxidant Activity ◽  
Methanol Extract ◽  
Phenolic Content ◽  
Maximum Amount ◽  
Chemical Components ◽  
Taxus Baccata ◽  
Dpph Radical ◽  
Flavonoid Content ◽  
Future Studies ◽  
Different Parts

Taxus species in different parts of the world prevent the formation of hepatoprotective, anticoagulant, antiulcerogenic, anti-coagulant, antifungal and tumour cells. In this study, biological activity studies were performed on the leaves, branches and fruits of the methanol extract of Taxus baccata L. species collected from Sivaslı district of Uşak province. The methanol extract of the T.baccata species, the total amount of phenolic content of the sample was found to be 14.76 mg GAEQ/1g dry sample in the highest leaves. In T.baccata methanol extract, the maximum amount of flavonoid content was 0.468±mg QE/g dry sample. Antioxidant activity value as DPPH radical; % inhibition value was found as 93.21%. Based on the results; It can be concluded that the leaves of T.baccata have higher antioxidant activity than fruits and branches. Future studies need to explore the chemical components contained in the T.baccata species to determine and investigate in further detail.

scholarly journals Phytochemical Analysis and In Vitro Effects of Allium fistulosum L. and Allium sativum L. Extracts on Human Normal and Tumor Cell Lines: A Comparative Study

Molecules ◽  
2021 ◽  
Vol 26 (3) ◽  
pp. 574
Author(s):  
Adrian Bogdan Țigu ◽  
Cristian Silviu Moldovan ◽  
Vlad-Alexandru Toma ◽  
Anca Daniela Farcaș ◽  
Augustin Cătălin Moț ◽  
...  
Keyword(s):  
Cell Line ◽  
Allium Sativum ◽  
Allium Fistulosum ◽  
Tumor Cell Lines ◽  
Sensitive Cell ◽  
Sensitive Cell Line ◽  
Welsh Onion ◽  
Normal Cells ◽  
Ic50 Value ◽  
High Concentrations

Allium sativum L. (garlic bulbs) and Allium fistulosum L. (Welsh onion leaves) showed quantitative differences of identified compounds: allicin and alliin (380 µg/mL and 1410 µg/mL in garlic; 20 µg/mL and 145 µg/mL in Welsh onion), and the phenolic compounds (chlorogenic acid, p-coumaric acid, ferulic acid, gentisic acid, 4-hydroxybenzoic acid, kaempferol, isoquercitrin, quercitrin, quercetin, and rutin). The chemical composition determined the inhibitory activity of Allium extracts in a dose-dependent manner, on human normal cells (BJ-IC50 0.8841% garlic/0.2433% Welsh onion and HaCaT-IC50 1.086% garlic/0.6197% Welsh onion) and tumor cells (DLD-1-IC50 5.482%/2.124%; MDA-MB-231-IC50 6.375%/2.464%; MCF-7-IC50 6.131%/3.353%; and SK-MES-1-IC50 4.651%/5.819%). At high concentrations, the cytotoxic activity of each extract, on normal cells, was confirmed by: the 50% of the growth inhibition concentration (IC50) value, the cell death induced by necrosis, and biochemical determination of LDH, catalase, and Caspase-3. The four tumor cell lines treated with high concentrations (10%, 5%, 2.5%, and 1.25%) of garlic extract showed different sensibility, appreciated on the base of IC50 value for the most sensitive cell line (SK-MES-1), and the less sensitive (MDA-MB-231) cell line. The high concentrations of Welsh onion extract (5%, 2.5%, and 1.25%) induced pH changes in the culture medium and SK-MES-1 being the less sensitive cell line.

scholarly journals Antifungal and Antioxidant Potential of Methanolic Extracts from Acorus calamus L., Chlorella vulgaris Beijerinck, Lemna minuta Kunth and Scenedesmus dimorphus (Turpin) Kützing

2021 ◽  
Vol 11 (11) ◽  
pp. 4745
Author(s):  
Toncho Dinev ◽  
Milena Tzanova ◽  
Katya Velichkova ◽  
Diyana Dermendzhieva ◽  
Georgi Beev
Keyword(s):  
Antioxidant Activity ◽  
Chlorella Vulgaris ◽  
Phenolic Content ◽  
Radical Scavenging ◽  
Total Phenolic ◽  
Acorus Calamus ◽  
Total Flavonoid Content ◽  
Flavonoid Content ◽  
Methanolic Extracts ◽  
Scenedesmus Dimorphus

Plant extracts are an important alternative to antibiotics, which are ever more restricted because of their developing microbial resistance and some adverse effects that have been observed following frequent application. The aim of the present study was to determine the antifungal and antioxidant activity of the methanolic extracts of Acorus calamus, Chlorella vulgaris, Lemna minuta and Scenedesmus dimorphus. The antifungal activity of the extracts against strains of Aspergillus flavus, Aspergillus parasiticus, Aspergillus ochraceus, Aspergillus niger, Aspergillus carbonarius, Fusarium graminearum, Fusarium oxysporum, Penicillium chrysogenum and Alternaria alternata was evaluated via the agar well diffusion method. The antioxidant activity of the extracts was measured through the determination of three parameters—total phenolic content, total flavonoid content and radical scavenging potential (determined through UV/Vis analysis). A. calamus extracts had the highest antimicrobial activity against eight fungal strains, followed by the C. vulgaris, L. minuta and S. dimorphus extracts, which were inhibitory against two to three strains. Among the extracts from the species studied, the extract from S. dimorphus showed the highest antioxidant potential, as determined via the DPPH (1,1’-diphenyl-2-picrylhydrazil-radical) method. This correlated to its high total phenolic and flavonoid content. From A. calamus and L. minuta, methanolic extracts were obtained that exhibited similar values of the aforementioned parameters, followed by C. vulgaris extracts, which showed the lowest antioxidant activity. Based on the Pearson correlation coefficients, the impacts of the total phenolic content and the total flavonoid content on radical scavenging capacity are similar, and flavonoids were a significant part of the total phenolic compounds extracted from the plant materials studied.

scholarly journals Designing Biodegradable and Active Multilayer System by Assembling an Electrospun Polycaprolactone Mat Containing Quercetin and Nanocellulose between Polylactic Acid Films

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1288
Author(s):  
Carol López de Dicastillo ◽  
Luan Garrido ◽  
Eliezer Velásquez ◽  
Adrián Rojas ◽  
Rafael Gavara
Keyword(s):  
Antioxidant Activity ◽  
Thermal Treatment ◽  
Polylactic Acid ◽  
Active Compound ◽  
Cellulose Nanocrystals ◽  
Barrier Properties ◽  
Electrospinning Process ◽  
Multilayer Systems ◽  
Innovative Strategy ◽  
Packaged Foods

The design of multilayer systems is an innovative strategy to improve physical properties of biodegradable polymers and introduce functionality to the materials through the incorporation of an active compound into some of these layers. In this work, a trilayer film based on a sandwich of electrospun polycaprolactone (PCL) fibers (PCLé) containing quercetin (Q) and cellulose nanocrystals (CNC) between extruded polylactic acid (PLA) films was designed with the purpose of improving thermal and barrier properties and affording antioxidant activity to packaged foods. PCLé was successfully electrospun onto 70 µm-thick extruded PLA film followed by the assembling of a third 25 µm-thick commercial PLA film through hot pressing. Optical, morphological, thermal, and barrier properties were evaluated in order to study the effect of PCL layer and the addition of Q and CNC. Bilayer systems obtained after the electrospinning process of PCL onto PLA film were also evaluated. The release of quercetin from bi- and trilayer films to food simulants was also analyzed. Results evidenced that thermal treatment during thermo-compression melted PCL polymer and resulted in trilayer systems with barrier properties similar to single PLA film. Quercetin release from bi- and trilayer films followed a similar profile, but achieved highest value through the addition of CNC.

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