scholarly journals Chemical characterization of Ginkgo biloba L. and antioxidant properties of its extracts and dietary supplements

2013 ◽  
Vol 51 ◽  
pp. 244-248 ◽  
Author(s):  
Eliana Pereira ◽  
Lillian Barros ◽  
Isabel C.F.R. Ferreira
Keyword(s):  
Dietary Supplements ◽  
Ginkgo Biloba ◽  
Antioxidant Properties ◽  
Chemical Characterization

scholarly journals ISOLATION AND CHEMICAL CHARACTERIZATION OF VOLATILE OILS OF CENTRATHERUM ANTHELMINTICUM AND CITRUS AURANTIFOLIA

2019 ◽  
Vol 1 (1) ◽  
pp. 06-09
Author(s):  
Shweta Srivastava
Keyword(s):  
Essential Oils ◽  
Antioxidant Properties ◽  
Chemical Characterization ◽  
Volatile Oil ◽  
Daily Consumption ◽  
Citrus Aurantifolia ◽  
Anti Cancer ◽  
Anti Oxidant ◽  
Centratherum Anthelminticum

Introduction: Centratherum anthelminticum is an ethnomedicinal plant in India and a common ingredient in Ayurvedic formulations. The pharmacological effects of C. anthelminticum ranges from anti-oxidant, anti-diabetic, anti-microbial to recently found anti-cancer activity. Citrus aurantifolia (Rutaceae) is mainly used in daily consumption, in many cultural cuisines, and in juice production. It is widely used because of its antibacterial, anticancer, antidiabetic, antifungal, anti-hypertensive, anti-inflammation, anti-lipidemia, and antioxidant properties. Objective: To isolate and identify the compounds in the essential oils from the seeds of C. anthelminticum Kuntz and peels of C. aurantifolia (Christm.) swingle collected from the Delhi NCR region. Materials and Methods: The essential oils from seeds of C. anthelminticum Kuntz and peels of C. aurantifolia were extracted by steam distillation and analyzed by gas chromatograph and gas chromatography–mass spectrometer. Results: Chemical characterization of the volatile oil and seeds of C. anthelminticum Kuntz showed that the oil is greenish and semi viscous. The major component of the oil was found to be beta-caryophyllene (64.43%), beta-pinene (9.81%), alpha-humulene (4.64%), caryophyllene oxide (2.24%), gamma-elemene (1.73%), limonene (1.48%) and myrecene (0.11%). Whereas the major constituents of volatile oil from peels of C. aurantifolia comprises of twenty nine components viz.  sesquiterpne alcohols (20.68%) including  Globulol, Hurmularel, 6 - dien - 3 - ol. (-) -Spathulenol, ledol,alpha-bisabolol, - (-) Spathulenol and Sesquíterpene esters (20.68%), caryophyllene, alpha- Farnesene, alpha-Caryophylline, gamma -elemene, gamma-.neoclovene, monoterpene alcohol (13.79%). Conclusion: The present study revealed the chemical composition of essential oils of both the drugs under study which can be used as references in the food, pharmaceutical and cosmetic industries.

Antioxidant properties and chemical characterization of Spanish Opuntia ficus-indica Mill. cladodes and fruits

2017 ◽  
Vol 98 (4) ◽  
pp. 1566-1573 ◽  
Author(s):  
Lucía Andreu ◽  
Nallely Nuncio-Jáuregui ◽  
Ángel A Carbonell-Barrachina ◽  
Pilar Legua ◽  
Francisca Hernández
Keyword(s):  
Antioxidant Properties ◽  
Chemical Characterization ◽  
Opuntia Ficus Indica

scholarly journals Chemical Composition of Leaves and Hull from Pistacia Vera L. an Evaluation of Phenolic Content and Antioxidant Properties of their Extracts

2020 ◽  
Author(s):  
Manel Elakremi ◽  
Leyre Sillero ◽  
Lazher Ayed ◽  
Jalel Labidi ◽  
Younes Moussaoui
Keyword(s):  
Phenolic Content ◽  
Antioxidant Activities ◽  
Antioxidant Properties ◽  
Chemical Characterization ◽  
Total Phenolic ◽  
Pistacia Vera ◽  
Phenolic And Flavonoid ◽  
By Products ◽  
Comprehensive Study

Abstract The pistachio industry in Tunisia generates a high amount of waste every year due to the large pistachio production. This, together with the good properties of the compounds that can be extracted from these by-products, makes it necessary a comprehensive study of their potential. Because of that, the aim of this work was to analyze the chemical characterization of male and female leaves and hull of Pistacia vera L. and their ethanol-water extracts. With that purpose, the total phenolic and flavonoid contents of the extracts were determined and their antioxidant activities were investigated using DPPH, ABTS and FRAP methods. The total phenolic content varied from 218to533mg GAE/g DE, and the total flavonoid content varied from119to 397 mg CE/g DE. In general, the antioxidant activity showed significant values. The DPPH assay and the ABTS assay were in the range of 332–704 mg TE/g DE and 427and 1394 mg TE/g DE, respectively .In the case of FRAP, male leaves extract had the best result, being the TE value 808 mg TE/g DE. All the extracts were rich in phenolic compounds and possess valuable antioxidant activities. Therefore, leaves and hull of Pistacia vera L. could be used as cheap natural antioxidant in different applications.

scholarly journals Antioxidant Action and In Vivo Anti-Inflammatory and Antinociceptive Activities of Myrciaria floribunda Fruit Peels: Possible Involvement of Opioidergic System

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Izabelly Bianca da Silva Santos ◽  
Bruno Santos dos Santos ◽  
João Ricardhis Saturnino de Oliveira ◽  
Wêndeo Kennedy Costa ◽  
Adrielle Zagmignan ◽  
...  
Keyword(s):  
High Performance ◽  
Antioxidant Properties ◽  
Chemical Characterization ◽  
Opioidergic System ◽  
Anti Inflammatory ◽  
Inflammatory Action ◽  
Monomeric Anthocyanins

This work evaluated the antioxidant properties and in vivo antinociceptive and anti-inflammatory effects of extracts obtained from fruit peels of Myrciaria floribunda (H. West ex Willd.) O. Berg (Myrtaceae). This plant is popularly known in Brazil as Cambuí or camboim. Different extracts were submitted to comparative analysis to determine the content of selected phytochemical classes (levels of total phenols, flavonoids, and monomeric anthocyanins) and the in vitro antioxidant potentials. The extract with higher potential was selected for in vivo evaluation of its antinociceptive and anti-inflammatory action. Finally, the chemical characterization of this extract was performed by high-performance liquid chromatography (HPLC). MfAE (extract obtained using acetone as solvent) showed the higher levels of phenols (296 mg GAE/g) and anthocyanins contents (35.65 mg Cy-3-glcE/g) that were associated with higher antioxidant activity. MfAE also exhibited in vivo anti-inflammatory and analgesic propertiers. This fraction inhibited the inflammatory and neurogenic phases of pain, and this effect was reversed by naloxone (suggesting the involvement of opioidergic system). MfAE reduced the abdominal contortions induced by acetic acid. The HPLC analysis revealed the presence of gallic acid (and its derivatives) and ellagic acid. Taken together, these data support the use of M. floribunda fruit peels for development of functional foods and nutraceutics.

scholarly journals Complex Evaluation of Antioxidant Capacity of Milk Thistle Dietary Supplements

Antioxidants ◽  
2019 ◽  
Vol 8 (8) ◽  
pp. 317 ◽  
Author(s):  
Jitka Viktorova ◽  
Milena Stranska-Zachariasova ◽  
Marie Fenclova ◽  
Libor Vitek ◽  
Jana Hajslova ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Dietary Supplements ◽  
Antioxidant Properties ◽  
Absorption Capacity ◽  
In Vitro Assays ◽  
Milk Thistle ◽  
Complex Evaluation

Numerous in vitro assays are used to characterize the antioxidant properties of natural-based matrices. However, many of them generate contradictory and non-compliant results. In our study, we focused on the characterization of traditionally used biochemical (2,2′-azino-bis-(3-ethylbenzothiazoline-6 sulfonic acid) (ABTS), Oxygen Radical Absorption Capacity (ORAC), and 2,2-diphenyl-1-picrylhydrazyl (DPPH)) and cellular (CAA) antioxidant tests on a broad set of milk thistle dietary supplements containing silymarin. In addition to 26 commercially available preparations, also the natural silymarin extract available from Sigma Aldrich, St. Louis, MI, USA, and a model mixture of pure flavonoid/flavonolignans mimicking the silymarin composition were investigated as control samples. Significant differences in the antioxidant capacity of the supplements were observed. Unlike the DPPH, the results of the ABTS and ORAC methods correlated with the silymarin components determined by U-HPLC-HRMS/MS. The responses in CAA were considerably lower than in other assays. Silymarin exhibited a significantly higher antioxidant capacity than the artificially prepared flavonoid/flavonolignans mixture in all tests, indicating possible presence of other antioxidants of natural origin. The follow-up U-HPLC-HRMS/MS screening revealed the presence of tens of non-silymarin compounds with reported antioxidant activity (not only in the silymarin extract, but also in the milk thistle preparations). The sum of the total phenolics and the sum of the simple phenolics correlated with CAA results more than silymarin.

Olfactory and Chemical Characterization of Indoor Air-Towards a Psychophysical Model for Air Quality

1981 ◽  
Author(s):  
Birgitta Berglund ◽  
Ulf Berglund ◽  
Thomas Lindvall ◽  
Helene Nicander-Bredberg
Keyword(s):  
Air Quality ◽  
Indoor Air ◽  
Chemical Characterization
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