scholarly journals Chemical characterization of pine bark (Pinus pinaster Aiton subsp. atlantica), antioxidant properties and phenolic profile of its extracts

2019 ◽  
pp. 79-87
Author(s):  
Catarina Vieito ◽  
Preciosa Pires ◽  
Élia Fernandes ◽  
Manuela Velho
Keyword(s):  
Pinus Pinaster ◽  
Antioxidant Properties ◽  
Chemical Characterization ◽  
Pine Bark ◽  
Phenolic Profile

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 Pigmented Corn Varieties as Functional Ingredients for Gluten-Free Products

Foods ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1770
Author(s):  
Francesca Colombo ◽  
Chiara Di Lorenzo ◽  
Katia Petroni ◽  
Marco Silano ◽  
Roberto Pilu ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Antioxidant Properties ◽  
Chemical Characterization ◽  
In Vivo Studies ◽  
Gluten Free ◽  
Cell Agglutination ◽  
Free Products ◽  
Phenolic Profile

Oxidative stress, one among the several factors responsible for the gluten toxicity in celiac disease, together with inflammation and duodenal mucosal injury, are only partially reduced by the gluten-free diet. Thanks to their phenolic profile, the pigmented varieties of corn could be an interesting source of dietary antioxidants for the formulation of new gluten-free ingredients. The aim of this research was: (1) to characterize the phenolic profile and the associated antioxidant properties of corn samples with different pigmentation, using spectrophotometric and chromatographic techniques and (2) to assess the stability of anthocyanins during the gastro-intestinal digestion. The pigmented varieties showed a significantly higher content of polyphenols compared to the common yellow varieties and, as a consequence, a higher antioxidant activity. Although corn is among the cereals most frequently used in gluten-free products, it can produce an inflammatory response in some celiac patients. Therefore, after the chemical characterization, the safety of the pigmented varieties for celiac patients was confirmed using different in vitro models (cell agglutination test and the measure of transepithelial electrical resistance). Although in vivo studies are necessary, the data collected in this study underline that the pigmented corn could have a role in reducing the oxidative stress at the intestinal level in celiac subjects.

scholarly journals Pycnogenol - extract from French maritime pine bark (Pinus pinaster), as an effective antioxidant against superoxide radical

2021 ◽  
Vol 1 (8) ◽  
pp. 14
Author(s):  
Beata Cizmarova ◽  
Anna Birkova ◽  
Beata Hubkova ◽  
Beata Bolerazska
Keyword(s):  
Antioxidant Capacity ◽  
Pinus Pinaster ◽  
Superoxide Radical ◽  
Positive Impact ◽  
Antioxidant Properties ◽  
Maritime Pine ◽  
Pine Bark ◽  
Community Research ◽  
Ph Values ◽  
Naturally Occurring

Background: Interest in the positive impact of naturally occurring polyphenols is still increasing in the scientific community. Research is focused mainly on their antioxidant properties, due to their significant effects in the prevention of diseases associated with oxidative stress. Pycnogenol is an extract from French maritime pine bark (Pinus pinaster), which is composed of a mixture of phenolic compounds: monomers (catechin, epicatechin, taxifolin), flavonoids (classed as procyanidins/proanthocyanidins), phenolic or cinnamic acids and their glycosides. Due to its composition, it has a high antioxidant capacity, and is used in traditional folk medicine, cosmetics and medicine.Purpose of the study: The aim is to study the antioxidant properties of pycnogenol in order to obtain experimental information on the antioxidant effect of pycnogenol in terms of concentration dependence and pH conditions.Methods: In our study, we used a methionine-riboflavin superoxide generator, and focused on determining the antioxidant capacity of Pycnogenol against the superoxide radical in different pH values (range 6.5 – 8) using the spectroscopic method.Results: Our results showed that the antioxidant properties increased with a higher concentration of the tested compound in the tested pH range. Amongst all tested pH values, the most appropriate for pycnogenol antioxidant capacity is slightly basic pH (pH 8).Conclusion: Information on the antioxidant and prooxidant properties of naturally occurring compounds is very important for understanding their activity and their proper use in prevention, disease treatment, and detection of pathological processes. The antioxidant activity of pycnogenol depends on the structure and concentration of antioxidants; it only slightly changes at different pH values. Increasing concentration of pycnogenol enhances its antioxidant properties.Keywords: Pycnogenol, reactive oxygen species, spectrophotometry, pH dependency

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.

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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