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1.

Comparison of Phytochemicals Antioxidant Activity and Essential Oil Content of Pimenta dioica (L.) Merr. (Myrtaceae) with Four Selected Spice Crop Species E.J.S. De Soysa, D.C. Abeysinghe, R.M. Dharmadasa World Journal of Agricultural Research. 2016 4 (6). doi: 10.12691/wjar-4-6-1 Keywords: pimenta dioica, total antioxidant capacity, total phenolic content, Phytochemicals , essential oils Context: ...s Houtt. with leaf extracts of Pimenta dioica using previously published protocols. Results revealed that all tested Phytochemicals namely alkaloids, flavanoids, saponins, steroid glycosides and tannins are present in all selected spice species compared. The ... Abstract Full Text (PDF) [Epub] Full Text (HTML)

2.

Distribution of Phytochemicals and Bioactivity in Different Parts and Leaf Positions of Stevia Rebaudiana (Bertoni) Bertoni- a Non-caloric, Natural Sweetener K.L.N.W. Kumari, D.C. Abeysinghe, R.M. Dharmadasa World Journal of Agricultural Research. 2016 4 (6). doi: 10.12691/wjar-4-6-2 Keywords: stevia rebaudiana, antioxidant capacity, flavonoids, phenolics, leaf positions Context: ...eaf (1st leaf>2nd leaf>3rd leaf>4th leaf>5th leaf). Moreover, all tested Phytochemicals (phenolics and flavonoids) and antioxidant capacity were significantly higher in extracts prepared from the first leaf. Interes... Abstract Full Text (PDF) [Epub] Full Text (HTML)

3.

Effect of Drying Methods on Phytochemicals , Antioxidant Activity and Total Phenolic Content of Dandelion Leaves John Barimah, Perpetual Yanney, Damian Laryea, Collins Quarcoo American Journal of Food and Nutrition. 2017 5 (4). doi: 10.12691/ajfn-5-4-4 Keywords: DPPH, freeze-drying, percentage inhibition, gallic acid, Folin-Ciocalteu reagent, flavonoids Context: ...m of this study was to evaluate the effects of different drying methods (hot-air drying, solar drying and freeze-drying) on the Phytochemicals as well as total phenolics content and antioxidant capacity of dandelion leaves. The fresh dandelion leaves had high contents o... Abstract Full Text (PDF) [Epub] Full Text (HTML)

4.

Effect of Phytochemicals on the Antioxidative Activity of Brain Lipids in High- and Low-fat-fed Mice and Their Structural Changes during in vitro Digestion Seung Jae Lee, Seung Yuan Lee, Myung-Sub Chung, Sun Jin Hur Journal of Food and Nutrition Research. 2015 3 (4). doi: 10.12691/jfnr-3-4-7 Keywords: Phytochemicals , antioxidant activity, mouse brain lipid, in vitro digestion Context: ...rain lipid samples were collected from the brains of low- and high-fat-fed mice and incubated with the in vitro-digested Phytochemicals to determine lipid oxidation. After digestion in the mouth, the 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) r... Abstract Full Text (PDF) [Epub] Full Text (HTML)

5.

Estimation of the Kinetic Parameters of the Inhibition of Tyrosinase by an Extract of S. Mombin (Root Bark) and the Investigation of Likely Interactions of Composite Phytochemicals Using Molecular Docking Calculations Oyasowo O., Fadare O.A., Olawuni J.I., Adeyanju M.M., Kolawole A.O., Obuotor E.M. American Journal of Pharmacological Sciences. 2018 6 (1). doi: 10.12691/ajps-6-1-3 Keywords: tyrosinase, fluorescence quenching, molecular docking, kinetic studies Context: The GCMS analysis of the ethyl acetate fraction of crude aqeous methanol extract of the root bark of Spondias mombin revealed the composition of 18 compounds of which two methyl esters of long chain carboxylic acids (methyl palmitate and (E)-9-octadecenoic acid methyl ester) account for 52% of the entire extract both having % peak area of 25.6% and 26.4% respectively. The ethyl acetate fraction of the S. mombin aqeous methanolic extract inhibited tyrosinase from Agaricus bisporus (mushroom) with an IC50 of 1.016 ± 0.003 mg/ml which was 25 fold higher than that of kojic acid which was used as a standard inhibitor of tyrosinase in a control experiment with an IC50 of 0.04 ± 0.006 mg/ml. The interaction between the EtOAc fraction of S. mombin and tyrosinase was investigated through fluorescence quenching studies. The fluorescence emission spectra of tyrosinase were recorded in the range of 300 – 500 nm with the excitation and emission wavelengths of tyrosinase at 290 nm and 345 nm respectively. The Intrinsic fluorescence quenching indicated that the test fraction interacted and quenched the fluorescence intensity of tyrosinase in a concentration dependent manner. Kinetic studies with the extract showed that the test fraction elicited a competitive mode of inhibition for the tyrosinase (from A. bisporus). The 3D structures of the 18 compounds detected as constituents of the fraction from GCMS analysis were generated and prepared for docking using a combination of software packages (ChemDraw Ultra 12.0 and MGL tools v1.5.4) and docked (using autodock vina v.1.1.2) with the 3D, X-ray crystallographic structure of the protein (obtained from the protein databank, rcsb.org, pdb code 2Y9X) in order to estimate their binding affinity and interactions with the protein. The docking calculations revealed that five compounds out of the eighteen had higher binding energy (-5.8 kcal/mol to -7.5 kcal/mol) relative to that of the standard, kojic acid (-5.6 kcal/mol). The compound identified to have the highest binding affinity for the tyrosinase is (E)-4-((4-(2-hydroxybenzamido)phenyl)amino)-4-oxobut-2-enoic acid with a binding energy of -7.5 kcal/mol. Abstract Full Text (PDF) [Epub] Full Text (HTML)

6.

Extraction of Phytochemicals from Eucalyptus Spp. & Withania Somnifera and Their Biological Testing Praveen Kumar Gupta, Priyanka V, Lingayya Hiremath, S Narendra Kumar, Ajeet Kumar Srivastava American Journal of Microbiological Research. 2018 6 (4). doi: 10.12691/ajmr-6-4-1 Keywords: Phytochemicals , Formulated phloroglucinol compounds, sideroxylonal, withaferin A, FTIR, HPLC, TLC Context: ...al properties owing to their safety, availability and reduced side effects. This project focuses on extraction of two different Phytochemicals from Eucalyptus Spp and Withania Somnifera. The present study narrows down on extraction of sideroxylonals from <... Abstract Full Text (PDF) [Epub] Full Text (HTML)

7.

Influence of Drying on the Phytochemicals and Antioxidant Properties of Bombax buonopozense (Gold Coast Bombax) Sepals Reindorf Boateng, Francis Alemawor, John Barimah, David Ben Kumah American Journal of Food Science and Technology. 2019 7 (2). doi: 10.12691/ajfst-7-2-2 Keywords: red silk cotton plant, Phytochemicals , drying methods, DPPH, Aluminium trichloride Context: ...robial and antioxidant properties. This study was aimed at determining the influence of drying (sun, solar, and oven drying) on Phytochemicals and antioxidant properties of the sepals. DPPH radical scavenging activity method was used to determine the antioxidant activit... Abstract Full Text (PDF) [Epub] Full Text (HTML)

8.

Phytochemicals and Bioactivities of Tradescantia zebrina Bosse: A Southern Mexican Species with Medicinal Properties Sebastian Alberto Ramos-Arcos, Sugey López-Martínez, José R. Velázquez-Martínez, Yenny A. Gómez-Aguirre, Emmanuel Cabañas-García, Carlos M. Morales-Bautista, Minerva A. Hernandez-Gallegos Journal of Food and Nutrition Research. 2023 11 (9). doi: 10.12691/jfnr-11-9-2 Keywords: Tradescantia zebrina, antioxidant, antibacterial, anti-inflammatory, extracts Context: Research was conducted on the biological potential and phenolic composition of Tradescantia zebrina Bosse. Through aqueous and hydroalcoholic extracts of leaves of the species, the total phenolic content (TPC), total flavonoid content (TFC) and total tannin content (TTC) were determined; the antioxidant activity by DPPH•, ABTS•+ and FRAP methods, as well as the biological activities, antibacterial by agar diffusion and minimum inhibitory concentration (MIC), and anti-inflammatory under the 12-O-tetradecanoylphorbol-13-acetate (TPA) method in Institute of Cancer Research (ICR) mice. The hydroalcoholic extract presented the highest TPC (73.07 ± 0.78 mg EAG/g), TFC (24.34 ± 0.68 mg EC/g) and TTC (26.96 ± 0.18 mg EAG/g), and a relevant antioxidant activity with the FRAP assay (353.92 ± 3.20 mM ET/g). In addition, this extract was the only one that presented an inhibition zone of 8.5 ± 1.4 and 8 ± 0.0 mm, against Bacillus cereus and Staphylococcus aureus, respectively. As well as a higher percentage of inhibition of inflammation (47.99%), an approximate value to the reference drug used. The evidence indicates that this plant possessing pharmaceutical potential that can be further explored as a natural source of new drugs. Abstract Full Text (PDF) [Epub] Full Text (HTML)

9.

Process-driven Valorization of Sonchus oleraceus Leaves: Optimization of Microwave-assisted Aqueous Extraction of Antioxidant Phytochemicals William Tchabo, Emmanuel Akdowa Panyoo, Spéro Ulrich Koba Edikou, Ibrahima Kaba, Mohamed Lamine Dabo, Durand Dah-Nouvlessounon, Joseph Dossou American Journal of Food Science and Technology. 2026 14 (1). doi: 10.12691/ajfst-14-1-1 Keywords: Process optimization, Phenolic compounds, Antiradical activity, Leaf powder processing Context: ...eloped a green strategy to valorize Sonchus oleraceus leaves by optimizing microwave-assisted aqueous extraction of antioxidant Phytochemicals . A three-factor Box–Behnken design quantified the individual and interactive effects of microwave power, extraction time, and p... Abstract Full Text (PDF) [Epub] Full Text (HTML)

10.

Review of Soybean Phytochemicals and Their Bioactive Properties Relevant for Skin Health Jong-Eun Kim, Young-Gyu Kang, Jun Seong Park, Tae-Gyu Lim, Ki Won Lee Journal of Food and Nutrition Research. 2017 5 (11). doi: 10.12691/jfnr-5-11-9 Keywords: anthocyanins, isoflavones, skin health, soybean, soy peptide Context: Numerous studies have investigated the bioactive properties of compounds present in soybean (Glycine max) that may have beneficial effects on the health of human skin. Several such compounds have already been introduced into commercial cosmetic products to promote functional properties such as skin whitening, anti-wrinkle activity and skin hydration. However, a significantly greater understanding of the application of soybean ingredients in these types of products is needed before optimal benefits can be realized. In this review, we aim to summarize some of the biological properties of soybean constituents and the underlying mechanisms of action responsible for beneficial effects in skin. In addition, we will discuss future directions for studies that may help to expand the applications for soybean compounds. Abstract Full Text (PDF) [Epub] Full Text (HTML)