scholarly journals Valorization of Gleditsia triacanthos Invasive Plant Cellulose Microfibers and Phenolic Compounds for Obtaining Multi-Functional Wound Dressings with Antimicrobial and Antioxidant Properties

2020 ◽  
Vol 22 (1) ◽  
pp. 33
Author(s):  
Ioana Cristina Marinas ◽  
Eliza Oprea ◽  
Elisabeta-Irina Geana ◽  
Oana Tutunaru ◽  
Gratiela Gradisteanu Pircalabioru ◽  
...  
Keyword(s):  
Invasive Species ◽  
Antimicrobial Activity ◽  
Phenolic Compounds ◽  
Temporal Dynamics ◽  
Antioxidant Properties ◽  
Raw Material ◽  
Wound Dressings ◽  
Gleditsia Triacanthos ◽  
Promising Alternative ◽  
Cellulose Microfibers

Gleditsia triacanthos is an aggressive invasive species in Eastern Europe, producing a significant number of pods that could represent an inexhaustible resource of raw material for various applications. The aim of this study was to extract cellulose from the Gleditsia triacanthos pods, characterize it by spectrophotometric and UHPLC–DAD-ESI/MS analysis, and use it to fabricate a wound dressing that is multi-functionalized with phenolic compounds extracted from the leaves of the same species. The obtained cellulose microfibers (CM) were functionalized, lyophilized, and characterized by ATR-FTIR and SEM. The water absorption and retention capacity as well as the controlled release of phenolic compounds with antioxidant properties evaluated in temporal dynamics were also determined. The antimicrobial activity against reference and clinical multi-drug-resistant Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Acinetobacter baumannii, Enterobacter cloacae, Candida albicans, and Candida parapsilosis strains occurred immediately after the contact with the tested materials and was maintained for 24 h for all tested microbial strains. In conclusion, the multi-functionalized cellulose microfibers (MFCM) obtained from the reproductive organs of an invasive species can represent a promising alternative for the development of functional wound dressings with antioxidant and antimicrobial activity, as well as being a scalable example for designing cost-effective, circular bio-economy approaches to combat the accelerated spread of invasive species.

scholarly journals Antioxidant properties, quantification and stability of betalains from pitaya (Hylocereus undatus) peel

2014 ◽  
Vol 45 (2) ◽  
pp. 323-328 ◽  
Author(s):  
Fernanda Robert de Mello ◽  
Claudia Bernardo ◽  
Caroline Odebrecht Dias ◽  
Luciano Gonzaga ◽  
Edna Regina Amante ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Antioxidant Properties ◽  
Raw Material ◽  
High Concentration ◽  
Natural Colorant ◽  
Wide Ph Range ◽  
Hylocereus Undatus ◽  
Ph Range ◽  
Promising Source

Pitaya peel can be used as a raw material for betalains extraction. The aim of this research was to quantify phenolic compounds, antioxidant activity and betalains on pitaya peel. Furthermore, evaluate the betalains stability against various pH conditions and exposure time of heating. The results showed that pitaya peel contains phenolic compounds and presented antioxidant activity. Moreover it showed high concentration of betalains (101.04mg equivalent to betanin. 100g-1) which were stable over a wide pH range (3.2 - 7.0) and were resistant to heating (100oC) up to 10 minutes at pH range from 3.7 to 5.5. Therefore, pitaya peel is a promising source of betalains which can be applied as a natural colorant for food.

scholarly journals The Impact of Processing Parameters on the Content of Phenolic Compounds in New Gluten-Free Precooked Buckwheat Pasta

Molecules ◽  
2019 ◽  
Vol 24 (7) ◽  
pp. 1262 ◽  
Author(s):  
Anna Oniszczuk ◽  
Kamila Kasprzak ◽  
Agnieszka Wójtowicz ◽  
Tomasz Oniszczuk ◽  
Marta Olech
Keyword(s):  
Phenolic Compounds ◽  
Phenolic Acids ◽  
High Performance ◽  
Antioxidant Properties ◽  
Total Content ◽  
Natural Antioxidants ◽  
Raw Material ◽  
Gluten Free ◽  
Free Phenolic Acids ◽  
The Impact

Buckwheat is a generous source of phenolic compounds, vitamins and essential amino acids. This paper discusses the procedure of obtaining innovative gluten-free, precooked pastas from roasted buckwheat grains flour, a fertile source of natural antioxidants, among them, phenolic acids. The authors also determined the effect of the extruder screw speed and the level of moisture content in the raw material on the quantity of free phenolic acids. The qualitative and quantitative analysis of phenolic acids in pasta was carried out using high-performance liquid chromatography electrospray ionization tandem mass spectrometry (HPLC-ESI-MS/MS). The chromatographic method was validated. For extracts with the highest total content of free phenolic acids and unprocessed flour from roasted buckwheat grain, the TLC-DPPH test was also performed to determine the antioxidant properties of the tested pasta. The level of moisture in the raw material had an impact on the content of phenolic acids. All pastas made from buckwheat flour moistened up to 32% exhibited a higher total content of free phenolic acids than other mixes moistened to 30 and 34% of water.

scholarly journals Sirkenin Antimikrobiyel Etkisi

2019 ◽  
Vol 7 (10) ◽  
pp. 1635
Author(s):  
Çağlar Gökırmaklı ◽  
Havva Nilgün Budak ◽  
Zeynep Banu Güzel-Seydim
Keyword(s):  
Antimicrobial Activity ◽  
Phenolic Compounds ◽  
Acid Content ◽  
Treatment Time ◽  
Antimicrobial Effect ◽  
Production Method ◽  
Raw Material ◽  
Microbial Metabolites ◽  
Gram Negative ◽  
Different Sources

Phenolic compounds, organic acids and microbial metabolites as well as high acid content are the main reasons behind the antimicrobial activity of vinegar against various microorganisms. The antimicrobial effect of the vinegar may change depending on raw material, production method and treatment time of the vinegar. In literature, antimicrobial effects of traditionally produced vinegars from different sources such as berry, wood, grape, apple, pomegranate, honey, blueberry, rice and industrially produced vinegars investigated. As a result, vinegars have antimicrobial effect on various gram negative and gram positive microorganisms. The aim of this review is to provide a detailed up-to-date information on the antimicrobial effect of vinegar.

scholarly journals Bioactive Compounds, RP-HPLC Analysis of Phenolics, and Antioxidant Activity of Some Portuguese Shrub Species Extracts

2011 ◽  
Vol 6 (12) ◽  
pp. 1934578X1100601 ◽  
Author(s):  
Ângelo Luís ◽  
Fernanda Domingues ◽  
Ana Paula Duarte
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Activity Index ◽  
Colorimetric Method ◽  
Antioxidant Properties ◽  
Raw Material ◽  
Total Phenolic ◽  
Methanolic Extracts ◽  
Rp Hplc

In the ecosystem of Serra Da Estrela, some plant species have the potential to be used as raw material for extraction of bioactive products. The goal of this work was to determine the phenolic, flavonoid, tannin and alkaloid contents of the methanolic extracts of some shrubs ( Echinospartum ibericum, Pterospartum tridentatum, Juniperus communis, Ruscus aculeatus, Rubus ulmifolius, Hakea sericea, Cytisus multiflorus, Crataegus monogyna, Erica arborea and Ipomoea acuminata), and then to correlate the phenolic compounds and flavonoids with the antioxidant activity of each extract. The Folin-Ciocalteu's method was used for the determination of total phenols, and tannins were then precipitated with polyvinylpolypyrrolidone (PVPP); a colorimetric method with aluminum chloride was used for the determination of flavonoids, and a Dragendorff's reagent method was used for total alkaloid estimation. The 2,2-diphenyl-1-picrylhydrazyl (DPPH) and β-carotene bleaching tests were used to assess the antioxidant activity of extracts. The identification of phenolic compounds present in extracts was performed using RP-HPLC. A positive linear correlation between antioxidant activity index and total phenolic content of methanolic extracts was observed. The RP-HPLC procedure showed that the most common compounds were ferulic and ellagic acids and quercetin. Most of the studied shrubs have significant antioxidant properties that are probably due to the existence of phenolic compounds in the extracts. It is noteworthy to emphasize that for Echinospartum ibericum, Hakea sericea and Ipomoea acuminata, to the best of our knowledge, no phytochemical studies have been undertaken nor their use in traditional medicine been described.

scholarly journals Quality Properties of Husk Tomato Juice and Its Impact in Stirred Probiotic Yogurt

2019 ◽  
pp. 1-10
Author(s):  
Eman M. Hegazy ◽  
Afaf O. Ali ◽  
Hoda Samir El-Sayed ◽  
Jihan M. Kassem
Keyword(s):  
Antimicrobial Activity ◽  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Dairy Product ◽  
Antioxidant Properties ◽  
Tomato Juice ◽  
Total Phenolic ◽  
Total Phenolic Compounds ◽  
Probiotic Yogurt ◽  
Husk Tomato

Background: Thinking about something new that is important for consumer health is a great concern to all those interested in the dairy industry and its products. Husk Tomato is a promising nutritious fruit rich in minerals, vitamins, and antioxidant compounds. Aim: The objective of this study is to evaluate Husk Tomato Juice (HTJ) constituents, its antimicrobial activity and antioxidant properties. Then utilize it for producing stirred probiotic yogurt (SPY) as a novel fermented product. Methodology: The main components and sugars of fresh HTJ were analyzed using High Performance Liquid Chromatography (HPLC). Antioxidant activity by DDPH (2, 2-diphenyl-1picrylhydrazil) test as well as total phenolic compounds were also determined. Four treatments of SPY fortified with 20, 30, 40 and 50% (v/v) HTJ & Lb. casei FEGY9973 (as probiotic bacteria) were prepared and served as T1, T2, T3 and T4 respectively were compared against control without juice. Results: Data revealed that the main compounds of HTJ were Sinapic (8.170 µg/ml), Protocatechuic (6.344 µg/ml) and Cinnamic (4.660 µg/ml). Contents of Fe, Mg, Na and Ca were 1.766, 1.627, 7.436 and 12.14 mg/100 g. Antioxidant activity and total phenolic compounds of fresh HTJ were 68.88% and 319.15 ppm respectively. It was found that HTJ had powerful antimicrobial activity against both of Y. enterocolitica and Ent. faecalies. On the other hand, data revealed that the antioxidant activity of fresh SPY samples were significantly (p<0.05) higher 67.66, 76.93, 69.34 and 69.59% for T1, T2, T3 and T4 in order, compared to control sample (66.57%). While, appearance scores had no significant (p>0.05) for all samples in fresh, 5 and 10 days of storage. All treatment samples possessed acceptable sensory properties. Conclusion: It could be conducted that SPY fortified with 20 and 30% HTJ had been successfully produced as a healthy dairy product.

scholarly journals Evaluation of the Phenolic Profile of Castanea sativa Mill. By-Products and Their Antioxidant and Antimicrobial Activity against Multiresistant Bacteria

Antioxidants ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 87 ◽  
Author(s):  
Vanessa Silva ◽  
Virgílio Falco ◽  
Maria Inês Dias ◽  
Lillian Barros ◽  
Adriana Silva ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Phenolic Compounds ◽  
Salmonella Enteritidis ◽  
Antioxidant Properties ◽  
Castanea Sativa ◽  
Industrial Wastes ◽  
Diffusion Method ◽  
Resistant Bacteria ◽  
Multiresistant Bacteria ◽  
By Products

The chestnut industry generates a large amount of by-products. These agro-industrial wastes have been described as potential sources of phenolic compounds with high bioactive potential. Therefore, we aimed to extract the phenolic compounds from chestnut by-products and assess their antioxidant potential and evaluate their antimicrobial activity against multidrug resistant bacteria. The individual phenolic compounds in the ethanolic extracts of chestnut shell, inner shell, bur, and leaves were characterized by HPLC-DAD/electrospray ionization (ESI)-MS. The antioxidant properties were determined by DPPH and ABTS assays. The minimum inhibitory concentration (MIC) and the antimicrobial susceptibility was performed using the Kirby–Bauer disc diffusion method against 10 bacterial strains. The major phenolic compounds identified in the extracts were trigalloyl-HHDP-glucose, gallic acid, quercetin, and myricetin glycoside derivatives. All chestnut by-products presented promising antioxidant activity in both assays, with leaf samples the ones presenting the highest antioxidant capacity. The inner shell’s extract was effective against all Gram-positive and two Gram-negative bacteria; nevertheless, all extracts showed antibacterial activity. Staphylococcus epidermidis showed susceptibility to all extracts while none of the extracts was able to suppress the growth of Escherichia coli and Salmonella enteritidis. Chestnut by-products are a source of phenolic compounds with prominent antioxidant and antimicrobial activities. Nevertheless, further studies should be conducted to assess the correlation between phenolic compounds and the bioactivities obtained.

scholarly journals Determination of Antioxidant Properties and Antimicrobial Activity of Vinyl Phenolic Compounds Extracted from Saccharomyces Cerevisiae Against Uropathogenic Bacteria

2020 ◽  
Vol 36 (1) ◽  
pp. 26-32
Author(s):  
Muazzam Sheriff Maqbul ◽  
Aejaz A. Khan ◽  
Tasneem Mohammed ◽  
S. M. Shakeel Iquba ◽  
Ibrahim Ahmed Shaikh ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Antimicrobial Activity ◽  
Phenolic Compounds ◽  
Antioxidant Properties ◽  
Uropathogenic Bacteria

scholarly journals Seaweed-Based Molecules and Their Potential Biological Activities: An Eco-Sustainable Cosmetics

Molecules ◽  
2021 ◽  
Vol 26 (17) ◽  
pp. 5313
Author(s):  
Haresh S. Kalasariya ◽  
Virendra Kumar Yadav ◽  
Krishna Kumar Yadav ◽  
Vineet Tirth ◽  
Ali Algahtani ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Biological Activities ◽  
Antioxidant Properties ◽  
Industrial Applications ◽  
Biologically Active ◽  
Marine Macroalgae ◽  
Bioactive Molecules ◽  
Bioactive Constituents ◽  
Promising Alternative ◽  
Cosmetic Industry

Amongst the countless marine organisms, seaweeds are considered as one of the richest sources of biologically active ingredients having powerful biological activities. Seaweeds or marine macroalgae are macroscopic multicellular eukaryotic photosynthetic organisms and have the potential to produce a large number of valuable compounds, such as proteins, carbohydrates, fatty acids, amino acids, phenolic compounds, pigments, etc. Since it is a prominent source of bioactive constituents, it finds diversified industrial applications viz food and dairy, pharmaceuticals, medicinal, cosmeceutical, nutraceutical, etc. Moreover, seaweed-based cosmetic products are risen up in their demands by the consumers, as they see them as a promising alternative to synthetic cosmetics. Normally it contains purified biologically active compounds or extracts with several compounds. Several seaweed ingredients that are useful in cosmeceuticals are known to be effective alternatives with significant benefits. Many seaweeds’ species demonstrated skin beneficial activities, such as antioxidant, anti-melanogenesis, antiaging, photoprotection, anti-wrinkle, moisturizer, antioxidant, anti-inflammatory, anticancer and antioxidant properties, as well as certain antimicrobial activities, such as antibacterial, antifungal and antiviral activities. This review presents applications of bioactive molecules derived from marine algae as a potential substitute for its current applications in the cosmetic industry. The biological activities of carbohydrates, proteins, phenolic compounds and pigments are discussed as safe sources of ingredients for the consumer and cosmetic industry.

Phenolic Compounds and Antimicrobial Activity of Inula sarana Boiss.

Planta Medica ◽  
2013 ◽  
Vol 79 (13) ◽  
Author(s):  
O Özhan ◽  
A Gökbulut ◽  
S Günal ◽  
E Şarer
Keyword(s):  
Antimicrobial Activity ◽  
Phenolic Compounds
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