Determination of phenolic compounds and antioxidant activities from peel, flesh, seed of guava (Psidium guajava L.)

2018 ◽  
Vol 39 (13) ◽  
pp. 1654-1662 ◽  
Author(s):  
Xuan Liu ◽  
Xu Yan ◽  
Jinfeng Bi ◽  
Jianing Liu ◽  
Mo Zhou ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Antioxidant Activities ◽  
Psidium Guajava

scholarly journals Medicinal Plants from Northeastern Brazil against Alzheimer’s Disease

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Alexandre Batista Penido ◽  
Selene Maia De Morais ◽  
Alan Bezerra Ribeiro ◽  
Daniela Ribeiro Alves ◽  
Ana Livya Moreira Rodrigues ◽  
...  
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Antioxidant Activities ◽  
Mangifera Indica ◽  
Psidium Guajava ◽  
Northeastern Brazil ◽  
Acetylcholinesterase Inhibition ◽  
Copaifera Langsdorffii

Alzheimer’s disease (AD) has been linked with oxidative stress, acetylcholine deficiency in the brain, and inflammatory processes. In the northeast region of Brazil, various plants are used to treat several diseases associated with these processes; then an antioxidant test was performed with those plants in a previous work and twelve species with higher antioxidant activity were selected for AChE inhibition evaluation. The phenolic compounds content was determined by Folin–Ciocalteu test and flavonoid content with AlCl3reagent using UV-visible spectrophotometry. The antioxidant activity was assessed analyzing the inhibitory activity against 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2-azinobis-3-ethylbenzothiazoline-6-sulfonate (ABTS) and by theβ-carotene/linoleic acid system and acetylcholinesterase inhibition using qualitative and quantitative tests. The combination of better acetylcholinesterase inhibitory and antioxidant activities pointed out six species, in descending order, as the best potential sources of therapeutic agents against AD:Hancornia speciosa > Myracrodruon urundeuva > Copaifera langsdorffii > Stryphnodendron coriaceum > Psidium guajava > Mangifera indica. Besides, the phenolic compounds in the species probably contribute to these activities. However, further pharmacological studies to assess the specific applications of these plants against AD are required to confirm these results.

scholarly journals Antioxidant activities and determination of phenolic compounds isolated from oriental plums (Soldam, Oishiwase and Formosa)

2012 ◽  
Vol 6 (4) ◽  
pp. 277 ◽  
Author(s):  
Se-Na Kim ◽  
Mee-Ree Kim ◽  
Soo-Muk Cho ◽  
So-Young Kim ◽  
Jung-Bong Kim ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Antioxidant Activities

Optimization of ultrasound-assisted extraction (UAE) of phenolic compounds from Crataegus pinnatifida leaves and evaluation of antioxidant activities of extracts

RSC Advances ◽  
2015 ◽  
Vol 5 (83) ◽  
pp. 67532-67540 ◽  
Author(s):  
Meng Luo ◽  
Jiao-Yang Hu ◽  
Zhuo-Yue Song ◽  
Jiao Jiao ◽  
Fan-Song Mu ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Antioxidant Activities ◽  
Hplc Method ◽  
Ultrasound Assisted Extraction ◽  
Simultaneous Extraction ◽  
Highly Efficient ◽  
Crataegus Pinnatifida ◽  
Assisted Extraction ◽  
Ultrasound Assisted

In this study, a highly efficient BBD–RSM optimized ultrasound-assisted extraction combined with HPLC method has been established for the simultaneous extraction and determination of CA, VG, VR, ORT, RT, VIT and HYP from Crataegus pinnatifida leaves.

scholarly journals Determination of Phenolic Compounds and Antioxidant Activity in Vegetables Consumed in Mekelle Tigray Ethiopia

2016 ◽  
Vol 4 (1) ◽  
pp. 17-22 ◽  
Author(s):  
Teklit G. Amabye ◽  
Frehiwot Mekonen
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Phenolic Content ◽  
Antioxidant Activities ◽  
Research Studies

Vegetables are widely consumed in Mekelle and imported from different regions and zones of the countries. This study was performed to evaluate the phenolic content and antioxidant activity of vegetables commonly consumed in Mekelle. Kale, carrot, cabbage and barcoli were used in the study. This research studies in detail the contents of phenolic compounds determined by the Folin−Ciocalteu reagent and the antioxidant activities determined by DPPH (using diphenyl-p-picrylhydrazyl radical). Among all vegetables kale showed highest phenolic content followed by barcoli, cabbage and carrot   and the highest antioxidant activity were barcoli followed by kale, cabbage and carrot   which was expressed in % of DPPH consumption after 30 minutes of reaction.  The data shows the importance of antioxidant activity of vegetables in the diet. 

scholarly journals Phenolic Compounds Analysis of Root, Stalk, and Leaves of Nettle

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
Semih Otles ◽  
Buket Yalcin
Keyword(s):  
Phenolic Compounds ◽  
High Performance ◽  
Antioxidant Activities ◽  
Total Phenolic ◽  
Phenolic Profile ◽  
Qualitative And Quantitative ◽  
Phenolic Components ◽  
Array Detection ◽  
The Difference

Types of nettles (Urtica dioica) were collected from different regions to analyze phenolic compounds in this research. Nettles are specially grown in the coastal part. According to this kind of properties, nettle samples were collected from coastal part of (Mediterranean, Aegean, Black sea, and Marmara) Turkey. Phenolic profile, total phenol compounds, and antioxidant activities of nettle samples were analyzed. Nettles were separated to the part of root, stalk, and leaves. Then, these parts of nettle were analyzed to understand the difference of phenolic compounds and amount of them. Nettle (root, stalk and leaves) samples were analyzed by using High-Performance Liquid Chromatography with Diode-Array Detection (HPLC-DAD) to qualitative and quantitative determination of the phenolic compounds. Total phenolic components were measured by using Folin-Ciocalteu method. The antioxidant activity was measured by using DPPH (2,2-diphenyl-1-picrylhydrazyl) which is generally used for herbal samples and based on single electron transfer (SET).

Determination of guava (Psidium guajava L.) leaf phenolic compounds using HPLC-DAD-QTOF-MS

2016 ◽  
Vol 22 ◽  
pp. 376-388 ◽  
Author(s):  
Elixabet Díaz-de-Cerio ◽  
Ana María Gómez-Caravaca ◽  
Vito Verardo ◽  
Alberto Fernández-Gutiérrez ◽  
Antonio Segura-Carretero
Keyword(s):  
Phenolic Compounds ◽  
Psidium Guajava
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