scholarly journals Chemical constituents and HRESI-MS analysis of an Algerian endemic plant - Verbascum atlanticum batt. - extracts and their antioxidant activity

2019 ◽  
Vol 34 (20) ◽  
pp. 3008-3012 ◽  
Author(s):  
Halima Khentoul ◽  
Chawki Bensouici ◽  
Fernando Reyes ◽  
Domenico Albanese ◽  
Djamel Sarri ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Chemical Constituents ◽  
Endemic Plant ◽  
Ms Analysis

scholarly journals LC-QTOF-MS Analysis and Activity Profiles of Popular Antioxidant Dietary Supplements in Terms of Quality Control

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Elwira Sieniawska ◽  
Tomasz Baj ◽  
Rafal Sawicki ◽  
Aleksandra Wanat ◽  
Krzysztof Kamil Wojtanowski ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Quality Control ◽  
Statistical Analysis ◽  
Dietary Supplements ◽  
Dietary Supplement ◽  
Chemical Constituents ◽  
Substantial Part ◽  
Ms Analysis ◽  
Chemical Groups

The dietary supplements with claimed antioxidant activity constitute a substantial part of the dietary supplement market. In this study, we performed the LC-QTOF-MS analysis and investigated the activity profiles of popular antioxidant dietary supplements from different chemical groups in terms of quality control. The commonly used antioxidant tests and statistical analysis revealed that substantial part of the results was comparable if 1 g sample was considered, but while comparing single and daily doses, significant differences in antioxidant values were noticed in all assays. The best antioxidant activity was obtained in ORAC assay (from 142 to 13814 μM of Trolox equivalents per 1 g of sample), and the strongest correlation occurred between TPC and ORAC. The LC-QTOF-MS analysis revealed that catechins were present in samples having the best antioxidant activity and that dietary supplements showing the weakest activity contained very small amount of any chemical constituents.

scholarly journals GC-MS Analysis of Chemical Constituents and in vitro Antioxidant Activity of the Organic Extracts from the Stem of Bridelia stipularis

2019 ◽  
Vol 48 (5) ◽  
pp. 999-1009
Author(s):  
Samina Khan Yusufzai ◽  
Mohammad Shaheen Khan ◽  
Eunice Lua Hanry ◽  
Mohd. Rafatullah ◽  
Belsheera Binti Elison
Keyword(s):  
Antioxidant Activity ◽  
Chemical Constituents ◽  
Ms Analysis ◽  
Organic Extracts ◽  
In Vitro Antioxidant Activity

FTIR, GC-MS and HPLC analysis of Baliospermum montanum (Willd.) Muell. Arg.

2020 ◽  
Vol 11 (4) ◽  
pp. 5059-5066
Author(s):  
Sushma B K ◽  
Raveesha H R
Keyword(s):  
Acetic Acid ◽  
Quantitative Estimation ◽  
Chemical Constituents ◽  
Standard Procedure ◽  
Naphthalene Acetic Acid ◽  
Root Extract ◽  
Pentanoic Acid ◽  
Trimethylsilyl Ester ◽  
Isolation And Characterization ◽  
Ms Analysis

The present work is aimed to determine the chemical constituents in Baliospermum montanum methanolic extracts. An in vitro regenerated procedure was developed for the induction of callus from stem explant cultured on Murashige and Skoog (MS) medium fortified with various concentration and permutations of 2, 4-dichloro phenoxy acetic acid, 1-naphthalene acetic acid, 6-benzyl amino purine and gibberellic acid. FTIR & GC-MS analysis was done according to standard procedure. The quantitative estimation of β-sitosterol was done by HPLC method. Maximum fresh and dry weight of callus was estimated in the combination of GA3 (0.5 mg/L) + NAA (2 mg/L) compared to other concentration. The FTIR analysis showed various functional compounds with different characteristic peak values in the extracts. Major bioactive constituents were recognized in the GC-MS analysis. Root extract revealed the existence of 1-hexadecanol, pentanoic acid, 2-(aminooxy)- and 1-hexacosanol. Leaf extract showed the presence of propanoic acid, 2-oxo-, trimethylsilyl ester, 9,12-octadecadienoic acid (z,z)-, trimethylsilyl ester, docosane, 1,22-dibromo- and pentatriacontane. Stem and stem derived callus exhibit the presence of 1,6,3,4-dihydro-2-deoxy-beta-d-lyxo-hexopyranose, n-hexadecanoic acid and pentanoic acid, 2-(aminooxy). The methanolic extract of leaf exhibited 0.2149 % of β-sitosterol content. There were no peaks observed in the root, stem and stem derived callus. Further studies are necessary for the isolation and characterization of bioactive compounds from B. montanum.

GC-MS analysis and in vitro antibacterial potential of volatile chemical constituents from leaves of Murrayakoenigii L. Spreng

2017 ◽  
Vol VI (I) ◽  
pp. 143-147
Author(s):  
Itzaz Aslam ◽  
Faiza Aslam ◽  
Shahzad Qamar ◽  
Saiqa Ishtiaq ◽  
Muhammad Shaharyar Khan Afridi ◽  
...  
Keyword(s):  
Chemical Constituents ◽  
Ms Analysis ◽  
Antibacterial Potential

Investigation of Compounds and Biological Activity of Selected Indonesian Marine Sponges

2020 ◽  
Vol 10 (3) ◽  
pp. 312-321
Author(s):  
Idin Sahidin ◽  
Carla W. Sabandar ◽  
Wahyuni ◽  
Rini Hamsidi ◽  
Sandra Aulia Mardikasari ◽  
...  
Keyword(s):  
Biological Activity ◽  
Antioxidant Activities ◽  
Chemical Constituents ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Marine Sponges ◽  
Chemical Screening ◽  
Methanol Extracts ◽  
Ms Analysis ◽  
Antioxidant Agents

Background: Marine sponges provided a great source of natural products with promising biological activity. This study was aimed to investigate the chemical constituents of methanol extracts of selected Indonesian marine sponges (Callyspongia sp., Clathria sp., Melophlus sarasinorum, and Xestospongia sp.), collected from the Saponda Islands, Southeast Sulawesi, Indonesia as well as to evaluate their antimicrobial and antioxidant activities. Methods: LCMS/MS analysis used to identify the compounds. Agar well diffusion and DPPH assays were used to evaluate the antimicrobial and antioxidant activities. Results: Chemical screening reported alkaloids, terpenoids, steroids, and saponins from all investigated sponges. The LC-MS/MS analysis identified various compounds which mainly contained steroids. Antimicrobial activity (against Bacillus subtilis, Escherichia coli, Salmonella enterica, and Candida albicans) was only shown by the Xestospongia sp. extract. Meanwhile, extracts of M. sarasinorum, Xestospongia sp., and Callyspongia sp. exhibited potent radical scavenging activity. Conclusion: The study concluded that the selected sponges could provide various groups of compounds. Methanol extracts of these sponges could be used as sources of antimicrobial and antioxidant agents.

scholarly journals Determination of Chemical Constituents and Antioxidant Activities of Leaves and Stems from Jatropha cinerea (Ortega) Müll. Arg and Jatropha cordata (Ortega) Müll. Arg

Plants ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 212
Author(s):  
Yeimi Cecilia Vega-Ruiz ◽  
Corina Hayano-Kanashiro ◽  
Nohemí Gámez-Meza ◽  
Luis Angel Medina-Juárez
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Activities ◽  
Biological Effects ◽  
Chemical Constituents ◽  
Weather Conditions ◽  
Antioxidant Compounds ◽  
Leaf Extracts ◽  
Methanolic Extracts ◽  
Northwestern Region ◽  
High Concentrations

Jatropha species have been shown to be an important source of secondary metabolites with different biological effects. Jatropha cinerea (Ortega) Müll. Arg and Jatropha cordata (Ortega) Müll. Arg are distributed in the Northwestern region of Mexico, are adapted to extreme weather conditions and are widely used (stems, leaves, and sap) in traditional medicine. The aim of the present study was to carry out the phytochemical characterization and the evaluation of the antioxidant activity in methanolic extracts of stems and leaves from J. cinerea and J. cordata. The compounds present in the extracts of both species were characterized by ESI-IT-MS/MS and quantified by HPLC-DAD. The results showed that the stem extracts of both species are rich in phenolic acids, while the leaf extracts are rich in flavonoids. Some of the main compounds found were gallic acid, gentisic acid, 3,4-Dihydroxybenzoic acid, vitexin, isovitexin, and catechol. Both species showed high concentrations of phenols and total flavonoids and antioxidant activity. J. cordata showed the highest antioxidant capacity and the highest concentration of phenolic compounds. Overall, both Jatropha species are a natural source of antioxidant compounds with potential biotechnological uses.

scholarly journals Phytochemical Screening, GC-MS Analysis and Antioxidant Activity of CurcurbitapepoL. usingIts Leaf Sample

2021 ◽  
pp. 33-45
Author(s):  
Ezekwe Ahamefula Sunday ◽  
Nwadike Constance Nnedimma ◽  
Wokocha Gift Peter ◽  
George Boma Orlando
Keyword(s):  
Mass Spectrometry ◽  
Molecular Weight ◽  
Antioxidant Activity ◽  
Gas Chromatography Mass Spectrometry ◽  
State University ◽  
Phytochemical Screening ◽  
Leaf Sample ◽  
Standard Methods ◽  
Ms Analysis ◽  
Ethylhexyl Phthalate

This study evaluated the phytochemical screening, gas chromatography-mass spectrometry (GC-MS) analysis and antioxidant activity of Curcurbitapepo L. using its leaf sample with standard methods. The sample used for the study was procured from Imo State University school farm and was properly identified. Result of phytochemical screening revealed the presence of  saponins, flavonoids, alkaloids, steroids, phlobactannins, proteins, and anthraquinnones, while the GC-MS analysis revealed a total of 78 compounds, out which Bis(2-ethylhexyl) phthalate (C24H38O4) had the highest molecular weight, 2,4,6-Octatriene, 2,6-dimethyl- (C10H16) had the highest peak area of 10.21% while Morphinan-6-ol, 4,5-epoxy-N-methyl-, (5α 6α- (C17H21NO2) had the highest retention time. The antioxidant activity of the studied sample was enhanced against the control. Some of the compounds as revealed by GC-MS analysis could be of healthcare or industrial importance.  There is need for further studies on the leaf sample to ascertain further the observations of the present study. This study has evaluated the phytochemical screening, GC-MS analysis and antioxidant activity of C.pepo L. using its leaf sample.

scholarly journals Chemical constituents and antioxidant activity of leaves and branches ofEugenia copacabanensisKiaersk (Myrtaceae)

Química Nova ◽  
2014 ◽  
Vol 37 (3) ◽  
Author(s):  
Almir Ribeiro de Carvalho Junior ◽  
Geovany Amorim Gomes ◽  
Rafaela Oliveira Ferreira ◽  
Mário Geraldo de Carvalho
Keyword(s):  
Antioxidant Activity ◽  
Chemical Constituents
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