Chemical profile and antioxidant activity in Diplopterys pubipetala (Malpighiaceae)

2020 ◽  
pp. 1-5
Author(s):  
Veronica de Melo Sacramento ◽  
Kamylla Teixeira Santos ◽  
Daniele Fernanda de Oliveira Rocha ◽  
Elaine Cristina Cabral ◽  
Marcos Nogueira Eberlin ◽  
...  
2018 ◽  
Vol 120 ◽  
pp. 305-312 ◽  
Author(s):  
Branimir Pavlić ◽  
Oskar Bera ◽  
Nemanja Teslić ◽  
Senka Vidović ◽  
Giuseppina Parpinello ◽  
...  

2020 ◽  
Vol 165 ◽  
pp. 93-99 ◽  
Author(s):  
Pallabi Banerjee ◽  
Subrata Jana ◽  
Shuvam Mukherjee ◽  
Kaushik Bera ◽  
Sujay Kumar Majee ◽  
...  

Author(s):  
Nemesio Villa- Ruano ◽  
Yesenia Pacheco- Hernández ◽  
Efraín-Rubio- Rosas ◽  
José A. Zárate- Reyes ◽  
Edmundo Lozoya- Gloria ◽  
...  

The present work describes the chemical composition of the leaf essential oils from the annual plant Dalea foliolosa, which was collected in three consecutive years (2014-2016). The amount of monoterpenes (69.5-84.6%) was higher to that of sesquiterpenes (10.3-22.9%) and aliphatic hydrocarbons (1-2.1%). Cryptone (22.3-30.6%) was the most abundant oxygenated monoterpene, followed by linalool (10.4-17.6%), caryophyllene oxide (4.6-15.3%), ascaridole (4.5-7.4%) and β-citronellol (3.8-5.6%). The hydrodistillated extract showed antioxidant activity against DPPH radical (IC50, 45-156 µg mL-1), strong anti-α-glucosidase activity (IC50, 14-47 µg mL-1) and inhibited the growth of Pseudomonas syringae pv. tabaci TBR2004 (MIC, 44-105 µg mL-1) and P. syringae pv. tomato DC3000 (MIC, 35-155 µg mL-1). The possible use of the essential oil as a novel additive for anti-hyperglycemic supplements and for the biological control of the analyzed Pseudomonas syringae varieties, may be contemplated.


2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Yi Hsieh ◽  
Ming-Chung Chiu ◽  
Jui-Yu Chou

Kombucha is a symbiotic culture of bacteria and yeast which produces a high-end fruity fitness beverage by fermentation of normal tea for approximately two weeks. In addition to the advantage of being a low-sugar probiotic-rich drink, kombucha also offers the benefits of the tea used for its preparation, especially its high antioxidant content. In this research, kombucha tea was prepared by using three different tea types: green, black, and pu’er tea, and the chemical profiles and antioxidant activity were analyzed during the fermentation process (up to 20 days). The results showed that the tea type has an obvious influence on the factors associated with the antioxidant potential. The fermentation process caused a marked increase in polyphenol content and antioxidant activity initially, but this slowed progressively over time. In contrast, the fermentation of black tea contributed to the degradation of flavonoids but showed no significant effect on the other tea types. Therefore, we conclude that the tea type selected to make kombucha affects the end product as well as the fermentation time.


2019 ◽  
Vol 9 (24) ◽  
pp. 5515 ◽  
Author(s):  
Cengiz Sarikurkcu ◽  
Eleni Kakouri ◽  
Rifat Tayyib Sarikurkcu ◽  
Petros A. Tarantilis

Ziziphora is a plant used in Turkish and Iran traditional medicine for its antibacterial activity, sedative and stomach soothing properties. Although the chemical profile of the essential oil of different Ziziphora species is well documented, data regarding plant extracts are incomplete. In this study extracts from Ziziphora taurica subsp. cleonioides were obtained using ethyl acetate, methanol and water and the chemical profile of the aerial part of the plant was elucidated. Among the compounds identified, rosmarinic acid was the most abundant (3375.67 ± 38.02 μg/mL), at the extract of methanol, followed by chlorogenic acid (3225.10 ± 16.44). Enzyme inhibition activity against α-amylase and tyrosinase was also estimated. The ethyl acetate extract showed the highest α-amylase activity (1.95 ± 0.04 mg/mL), while the best anti-tyrosinase activity was calculated for the methanolic extract (1.25 ± 0.01 mg/mL). In addition, total phenolic, flavonoid content and antioxidant activity were evaluated. According to our results, bioactivity of the plant is of great interest, nonetheless, at the same time, it is strongly depended on the solvent used during the extraction process. Our data suggest that the plant under study may be an important source to consider against metabolic, skin pigmentation and oxidative stress related disorders.


2018 ◽  
Vol 13 (1) ◽  
pp. 312-318 ◽  
Author(s):  
Ewa Witkowska-Banaszczak ◽  
Dominika Radzikowska ◽  
Karolina Ratajczak

AbstractThe influence of stress factors on a plant may lead to worse functioning of the plant and the loss of its crop. The effect of Aulacorthum solani feeding on Trollius europaeus with regard to active compounds in the leaves was investigated in the study. The antioxidant activity of the leaves, the material on which the insects fed, was compared with that of the material that was not infested by the aphids. Stress level was evaluated on the basis of such physiological parameters as chlorophyll fluorescence and photosynthesis activity. An increase of 34.5% in the content of polyphenolic compounds, as compared to control, was demonstrated in the material exposed to the biotic stress caused by aphids. The content of phenolic acids was 28% higher while that of flavonoids rose by 25%. The increase in polyphenolic compounds augmented the antioxidant activity of the material.


2016 ◽  
Vol 89 ◽  
pp. 141-151 ◽  
Author(s):  
Vladimir Mihailović ◽  
Samo Kreft ◽  
Eva Tavčar Benković ◽  
Nevena Ivanović ◽  
Milan S. Stanković

2014 ◽  
Vol 29 (3) ◽  
pp. 293-296 ◽  
Author(s):  
Sanja Ćavar Zeljković ◽  
Faik Ahmet Ayaz ◽  
Huseyin Inceer ◽  
Sema Hayirlioglu-Ayaz ◽  
Nesrin Colak

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