Determination of theoretical calculations by DFT method and investigation of antioxidant, antimicrobial properties of olive leaf extracts from different regions

Baysal, Gülay; Kasapbasi, Esra E.; Yavuz, Nurgül; Hür, Zühre; Genç, Kübra; Genç, Musa

doi:10.1007/s13197-020-04702-0

Cited by 15 publications

(9 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The phenolic profile of olive leaves varies within cultivar and is influenced by the timing of sampling/harvest, climatic conditions, geographical origin, age and biological cycle of the tree, agricultural practices applied, and conditions during extraction/isolation, processing, storage, etc. [ 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Antioxidant and Antimicrobial Activity of Hydroethanolic Leaf Extracts from Six Mediterranean Olive Cultivars

et al. 2022

View full text Add to dashboard Cite

Phenolic profiles, antioxidant, and antimicrobial activities of hydroethanolic olive leaf extracts from six Mediterranean olive cultivars (Croatian: Lastovka, Levantinka, Oblica; Italian: Moraiolo, Frantoio, Nostrana di Brisighella) were investigated. As expected, various distributions of phenolic levels were observed for each cultivar and the total phenolic content showed high variability (ranging from 4 to 22 mg GAE/g of dry extract), with the highest amount of phenolics found in the Oblica sample, which also provided the highest antiradical (ORAC) and reducing activity (FRAP). The screening of individual compounds was performed by HPLC-PDA-ESI-QTOF-MS and the main detected compounds were oleuropein, hydroxytyrosol, oleoside/secologanoside, verbascoside, rutin, luteolin glucoside, hydroxyoleuropein, and ligstroside. While the antioxidant activity of the samples was relatively high, they showed no bactericidal and bacteriostatic activity against E. coli and S. Typhimurium; weak activity against Staphylococcus aureus, Bacillus cereus, and Listeria innocua; and inhibitory effects against Campylobacter jejuni at 0.5 mg dry extract/mL. The obtained results support the fact that olive leaf extracts, and especially those from the Oblica cultivar, could potentially be applied in various industries as natural preservatives and effective and inexpensive sources of valuable antioxidants.

show abstract

Section: Introductionmentioning

confidence: 99%

Antioxidant and Antimicrobial Activity of Hydroethanolic Leaf Extracts from Six Mediterranean Olive Cultivars

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The antioxidant analyzes were performed according to the literature, 20,22,23 and the DPPH method was used. Analysis results obtained according to Table 1 were evaluated.…”

Section: Resultsmentioning

confidence: 99%

“…The encapsulation process was performed according to the literature. 20 The final product obtained was named CSA and CSB. The CSA sample contains 500 mg of taurine and 1000 mg of garlic, while the CSB sample contains 1000 mg of taurine and 1000 mg of garlic.…”

Section: The Encapsulation Process Of Chitosanmentioning

confidence: 99%

Encapsulation and antibacterial studies of goji berry and garlic extract in the biodegradable chitosan

Baysal

Olcay

Günneç

2023

Journal of Bioactive and Compatible Polymers

Self Cite

View full text Add to dashboard Cite

As known, the chitosan is a biodegradable biopolymer with antibacterial properties, therefore it is used in the fields of pharmacy, medical, wastewater treatment, biotechnology, cosmetics, textiles, and agriculture. Apart from these, the chitosan has an important place in the food industry with its widespread use. In this research article, the chitosan were encapsulated with the taurine and garlic extracts by the spray dryer. The CSA and CSB compounds synthesized as final products were analyzed by Fourier transformed infrared spectroscopy (FTIR) and High Performance Liquid Chromatography (HPLC). The effect of the encapsulation process on the molecular weight of the polymer structure was investigated using the cryoscopy method. The compound CSA represents 1/2 encapsulation of chitosan with taurine and increased garlic extracts, respectively, while CSB represents 1/1 encapsulation of chitosan with increased taurine and fixed garlic extracts. The % antioxidant activity of the final products was determined by DDPH method. The inhibition zone and surface activity proporties of the CSA and CSB were carried out against Listeria monocytogenes, Staphylococcus aureus, E. coli, and Salmonella bacteria. The results obtained as a result of the analyzes were evaluated, and optimum values were determined for use in food packaging.

show abstract

“…Agricultural biomass waste is worth discussing in terms of environmental problems. Although they are considered as waste, their potential bioactive properties, such as bioavailability, antioxidant [30], antimicrobial [31,32], in vitro and anti-inflammatory properties, could benefit human life. As mentioned in [33], the by-products from the tomato processing industry, such as lycopene, beta-carotene, glutamic acid or aspartic acid, can be revalorized and incorporated as nutrients in functional foods.…”

Section: Introductionmentioning

confidence: 99%

“…The carotenoids' bioavailability in tomato by-products is a key factor that helps in the prevention of different chronic diseases and carcinogenesis [33]. According to Baysal et al [32], olive leaves are proven to have antioxidant and antimicrobial functions. By varying the drying method of olive leaves from different sources, one can obtain a direct effect on its phenolic compound content, which affects its functionality.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Synthesis of Graphite from Agricultural Bio-Waste Material: A Review

et al. 2023

View full text Add to dashboard Cite

Graphitic carbon is a valuable material that can be utilized in many fields, such as electronics, energy storage and wastewater filtration. Due to the high demand for commercial graphite, an alternative raw material with lower costs that is environmentally friendly has been explored. Amongst these, an agricultural bio-waste material has become an option due to its highly bioactive properties, such as bioavailability, antioxidant, antimicrobial, in vitro and anti-inflammatory properties. In addition, biomass wastes usually have high organic carbon content, which has been discovered by many researchers as an alternative carbon material to produce graphite. However, there are several challenges associated with the graphite production process from biomass waste materials, such as impurities, the processing conditions and production costs. Agricultural bio-waste materials typically contain many volatiles and impurities, which can interfere with the synthesis process and reduce the quality of the graphitic carbon produced. Moreover, the processing conditions required for the synthesis of graphitic carbon from agricultural biomass waste materials are quite challenging to optimize. The temperature, pressure, catalyst used and other parameters must be carefully controlled to ensure that the desired product is obtained. Nevertheless, the use of agricultural biomass waste materials as a raw material for graphitic carbon synthesis can reduce the production costs. Improving the overall cost-effectiveness of this approach depends on many factors, including the availability and cost of the feedstock, the processing costs and the market demand for the final product. Therefore, in this review, the importance of biomass waste utilization is discussed. Various methods of synthesizing graphitic carbon are also reviewed. The discussion ranges from the conversion of biomass waste into carbon-rich feedstocks with different recent advances to the method of synthesis of graphitic carbon. The importance of utilizing agricultural biomass waste and the types of potential biomass waste carbon precursors and their pre-treatment methods are also reviewed. Finally, the gaps found in the previous research are proposed as a future research suggestion. Overall, the synthesis of graphite from agricultural bio-waste materials is a promising area of research, but more work is needed to address the challenges associated with this process and to demonstrate its viability at scale.

show abstract

Determination of theoretical calculations by DFT method and investigation of antioxidant, antimicrobial properties of olive leaf extracts from different regions

Cited by 15 publications

References 18 publications

Antioxidant and Antimicrobial Activity of Hydroethanolic Leaf Extracts from Six Mediterranean Olive Cultivars

Antioxidant and Antimicrobial Activity of Hydroethanolic Leaf Extracts from Six Mediterranean Olive Cultivars

Encapsulation and antibacterial studies of goji berry and garlic extract in the biodegradable chitosan

Recent Advances in Synthesis of Graphite from Agricultural Bio-Waste Material: A Review

Contact Info

Product

Resources

About