Secondary Metabolites and Antioxidant Potentials of Axis Sea Bamboo (Isis hippuris)

Secondary metabolites of the axis section (modulla skeleton) of sea bamboo (Isis hippuris) were identified by GC-MS. The dominant compounds using GC-MS in the ethanol fraction were hexanedioic acid (11.85%), acetamide (9.46%), n-hexadecanoic acid (9.22%) and thiosulfuric acid (7.22%). On the other side, the dominant compounds of the test results in the ethyl acetate fraction were 7-oxabicyclo[4.1.0] heptanes (28.27%), 1,2- benzene dicarboxylic acid (14.77%), cis-8-(N-pyrrolidyl)-(2,2,5,5-tetradeutero)bicyclo[4.3.0]nona-3,7-diene (9.98%), hexahydropyridine (7,86%). The dominant compounds of the n-hexane fraction were hexanedioic acid (41.99%), azetidine with a peak number of 40 (9.98%), 1-octadecene (8,36%). Antioxidant activities were also evaluated by DPPH scavenging assay. The ethanol, n-hexane and ethyl acetate fractions showed total flavonoid contents of 7.86% ± 0.12, 12.97% ± 0.36, 1.88% ± 0.26, respectively and the IC50 in the antioxidant assay were 480.25±74,74, 469.50±19,13, 3221.07±138,69 respectively. Dhaka Univ. J. Pharm. Sci. 18(1): 13-20, 2019 (June)

Download Full-text

PENENTUAN POTENSI EKSTRAK KULIT BATANG TUMBUHAN SIKKAM (Bischofia javanica Blume) SEBAGAI ANTIOKSIDAN DENGAN METODE DPPH DAN SITOTOKSIK DENGAN METODE BSLT

Alotrop ◽

10.33369/atp.v4i1.13715 ◽

2020 ◽

Vol 4 (1) ◽

Author(s):

Dapot Parulian Manurung ◽

Agus Sundaryono ◽

Hermansyah Amir

Keyword(s):

Antioxidant Activity ◽

Ethyl Acetate ◽

Crude Extract ◽

Anticancer Agent ◽

Ethyl Acetate Fraction ◽

Hexane Fraction ◽

Bark Extract ◽

Test Results ◽

Bischofia Javanica ◽

Ethanol Fraction

This study aims to determine the level of antioxidant activity of Sikkam bark extract (Bischofia javanica Blume) and its potential as an anticancer agent. This research was conducted in November 2018 - April 2019 in the Laboratory of Chemical Education Guidance and Counseling and Basic Science Laboratory, University of Bengkulu. The sample in this study was obtained from Gunung Mariah village in Simalungun district, North Sumatra. The method used in this study was extraction using maceration, liquid-liquid fractionation, phytochemical test, DPPH (Diphenylpicrylhiydrazyl) test and BSLT test (Brine Shrimp Lethality Test). Extraction maceration using ethanol 96%, fractionation using a solvent n-hexane and ethyl acetate, phytochemical tests using Mayer's reagent, Lieberman-Burchard, FeCl3 1% and H2SO4 2N, antioxidant test using DPPH (1,1-diphenyl-2-picrylhydrazyl) and cytotoxic tests using shrimp Artemia salina Leach larvae. The results of the study on maceration of 800 grams of Sikkam bark obtained a crude extract of 53.6 grams (6.7%). Fractionation from 10 grams of crude extract obtained 7.24 gram ethanol fraction (72.4%), ethyl acetate fraction 2.14 gram (21.4%) and n-Hexane fraction 0.39 gram (3.9%). Phytochemical test results obtained the content of alkaloids, flavonoids, tannins, saponins and terpenoids with the highest yield on tannin compounds. The antioxidant activity test results obtained IC50 values in crude extracts of 20.94 ppm, ethanol fraction 36.29 ppm, ethyl acetate fraction 83.28 ppm and n-Hexane fraction 39.13 ppm which showed that crude extract, ethanol fraction, n-Hexane fraction were categorized as very strong antioxidants and Ethyl acetate fraction is categorized as a strong antioxidant. The cytotoxic test results using crude extract obtained an LC50 value of 54,827 ppm which showed that Sikkam bark extract was toxic so that it was potential as an anticancer agent.

Download Full-text

Evaluation of Antioxidant Activities From Ethyl Acetate Fraction of Curry Leaf Using DPPH Method

Elkawnie ◽

10.22373/ekw.v7i1.8059 ◽

2021 ◽

Vol 7 (1) ◽

Author(s):

Ulil Amna ◽

Halimatussakdiah Halimatussakdiah ◽

Furqan Nur Ihsan ◽

Puji Wahyuningsih

Keyword(s):

Antioxidant Activity ◽

Secondary Metabolites ◽

Ethyl Acetate ◽

Antioxidant Activities ◽

Ethyl Acetate Fraction ◽

Murraya Koenigii ◽

Chromatography Method ◽

Ic50 Value ◽

Dpph Method ◽

Ethyl Acetate Extracts

Abstract: Curry Plant (Murraya koenigii (Linn.) Spreng) is one of the plants that thrive in Indonesia. Curry contains secondary metabolites of alkaloids and flavonoids that have the potential as antioxidants. Antioxidants can reduce the activity of free radicals that can cause degenerative diseases such as cancer, coronary heart disease, and premature ageing of body cells by donating the protons to free radical compounds. This study aimed to determine the antioxidant activity and identify the active compound class of ethyl acetate fraction from curry leaves. Separation of secondary metabolites of ethyl acetate extracts was carried out by column chromatography method, which obtained 5 different fractions. The antioxidant activity of fractions A, B, C, D, and E was tested using the DPPH (2,2-diphenyl-1-picrylhydrazyl) method with variations concentrations of 25, 50, 100, 200, and 400 ppm, and ascorbic acid was used as a comparison which measured at a wavelength of 517 nm. The results showed that fractions A and E have weak antioxidant activities, while fractions B, C, and D showed moderate antioxidant activities. The highest antioxidant activity was found in fraction B with an IC50 value of 341.38 ppm, where the fraction showed the presence of secondary metabolites of alkaloids and terpenoids.Abstrak: Tanaman kari ((Murraya koenigii (Linn.) Spreng) merupakan salah satu tanaman yang tersebar di Indonesia. Kari mengandung senyawa metabolit sekunder alkaloid dan flavonoid yang memiliki potensi sebagai antioksidan. Antioksidan dapat mengurangi aktivitas radikal bebas yang dapat menyebabkan penyakit degeneratif seperti kanker, penyakit jantung coroner dan penuaan sel dengan cara menyumbangkan proton pada senyawa radikal bebas. Tujuan dari penelitian ini adalah untuk menentukan aktivitas antioksidan dan mengidentifikasi kelas senyawa aktif fraksi etil asetat dari daun kari. Pemisahan metabolit sekunder dari ekstrak etil asetat dilakukan menggunakan metode kromatografi kolom dengan menghasilkan 5 fraksi yang berbeda. Aktivitas antioksidan dari fraksi A, B, C ,D ,dan E dilakukan menggunakan metode DPPH (1,1-diphenil-2-pikrilhydrazil) dengan variasi konsentrasi 25, 50, 100, 200, dan 400 ppm dan asam askorbat digunakan sebagai perbandingan yang diukur pada panjang gelombang 517 nm. Hasil menunjukkan bahwa fraksi A dan E memiliki aktivitas antioksidan yang lemah, sedangkan fraksi B, C, dan D menunjukkan aktivitas antioksidan sedang. Aktivitas antioksidan yang paling tinggi ditemukan pada fraksi B dengan IC50 341,38 ppm. Fraksi tersebut menunjukkan adanya kandungan senyawa metabolit sekunder alkaloid dan terpenoid.

Download Full-text

Comparative free radical scavenging and hypoglycemic activities of n-hexane, ethyl-acetate, and aqueous fractions of Azanza garckeana pulp

10.53858/arocnpr01020108 ◽

2021 ◽

Vol 1 (2) ◽

pp. 1-8

Author(s):

Abubakar A. Yusuf ◽

Toheeb D. Yissa ◽

Abdulhakeem Rotimi Agboola ◽

Sodiq M Balogun ◽

Peter O. Adeboye ◽

...

Keyword(s):

Ethyl Acetate ◽

Radical Scavenging ◽

Ethyl Acetate Fraction ◽

Diabetic Rats ◽

Hypoglycemic Effect ◽

Hexane Fraction ◽

Dependent Manner ◽

Aqueous Fraction ◽

Dpph Scavenging ◽

Glucose Reduction

Background: The prevalence of diabetes mellitus is increasing on a global trend. The aim of the present study is to identify the most effective antioxidants and hypoglycemic fraction of Azanza garckeana. Methods: The fractions (nhexane or ethyl-acetate or aqueous) of A. garckeana were administered to the alloxan-induced diabetic rats at doses of 100, 200, and 400 mg/kg for 15 days. Antioxidants activities were evaluated at concentrations of 62.5, 125, 250, and 500 µg/mL using the DPPH scavenging assay. Results: Results revealed that both the hexane, ethyl-acetate, and aqueous fractions exhibited hypoglycemic and antioxidants activities in a dose-dependent manner. The n-hexane fraction demonstrated highest percentage DPPH scavenging effect of 26.34±3.43, 38.44±4.35, 59.34±3.45, and 74.83±5.35 at 62.5, 125, 250, and 500 µg/mL respectively. The ethyl-acetate fraction demonstrated 19.33±2.98, 28.94±3.24, 47.34±2.90, and 57.82±4.54 respectively while the aqueous fraction exhibited the least activities of 12.45±23.45, 18.64±2.94, 27.94±3.89, and 39.43±3.89 at concentrations of 62.5, 125, 250, and 500 µg/mL respectively. In addition, the n-hexane fraction demonstrated the most significant hypoglycemic effect with the highest glucose reduction of 58.97 ±3.45 %, 63.86±5.35 %, and 66.51±4.35 %, ethyl acetate fraction demonstrated glucose reduction of 7.55±0.54%, 21.77±2.35 %, and 29.56±3.46 % while the aqueous fraction demonstrated the least hypoglycemic effect of 9.89±2.67 %, 18.09±3.45 %, and 18.87±3.24 at 100, 200 and 400 mg/kg bw respectively. Conclusion: The n-hexane fraction of Azanza garckeana extract could serve as a reservoir of bioactive agents that could be useful for the development of a new anti-diabetic agent

Download Full-text

A Polyphenol-Rich Fraction from Eugenia uniflora Exhibits Antioxidant and Hepatoprotective Activities In Vivo

Pharmaceuticals ◽

10.3390/ph13050084 ◽

2020 ◽

Vol 13 (5) ◽

pp. 84

Author(s):

Mansour Sobeh ◽

Marwa S. Hamza ◽

Mohamed L. Ashour ◽

Mona Elkhatieb ◽

Mohamed A El Raey ◽

...

Keyword(s):

Carbon Tetrachloride ◽

Liver Injury ◽

Ethyl Acetate ◽

Acute Liver Injury ◽

Antioxidant Activities ◽

Biological Effects ◽

Ethyl Acetate Fraction ◽

Eugenia Uniflora ◽

Quercetin Derivatives

Leaves from Eugenia uniflora, the red Brazilian cherry, have a high content of flavonoids that possess several biological effects such as anti-inflammatory, antioxidant, and antidiabetic activities. However, their influence on carbon tetrachloride (CCl4)-induced acute liver injury in rats has not been investigated. In the current study, a bioguided fractionation assay revealed that the ethyl acetate fraction (EAF) of Eugenia uniflora is the safest and most active fraction. LC-MS analysis of the ethyl acetate fraction revealed 22 secondary metabolites, mainly myricetin and quercetin derivatives. EAF did not show toxicity up to 2000 mg/kg, and exhibited antioxidant activities in vitro in DPPH assay with IC50 of 3.35 µg/mL. Additionally, EAF exhibited substantial antioxidant activities in vivo by counteracting the oxidative damage of the prooxidant juglone [80 µM] in Caenorhabditis elegans model organism and increased its survival rate in a dose-dependent fashion through the DAF-16/Foxo pathway. Furthermore, the hepatoprotective activity of EAF (200 mg/kg against carbon tetrachloride (CCl4) intoxicated male Wistar rats was assessed. EAF significantly inhibited CCl4-induced elevation of alanine aminotransferase (ALT), aspartate transaminase (AST), total bilirubin (TB), total cholesterol (TC), and triglycerides (TG), in the blood serum and prevented lipid peroxidation and restored superoxide dismutase (SOD) activity and glutathione (GSH) content in liver tissues. The observed hepatoprotective effects of EAF, which were supported by histopathological observations as pretreatment with EAF, effectively attenuated the CCl4-induced histopathological changes. In conclusion, EAF of Eugenia uniflora leaves has substantial hepatoprotective activities against CCl4 induced acute liver injury in rats due to its antioxidant activity.

Download Full-text

Chemical profiling and antioxidant activities of essential oil from rhizomes of Acorus calamus L.

BIBECHANA ◽

10.3126/bibechana.v17i0.25201 ◽

2020 ◽

Vol 17 ◽

pp. 89-95

Author(s):

Sumnath Khanal ◽

Devi Prasad Bhandari ◽

Laxman Bhandari ◽

Achyut Adhikari

Keyword(s):

Essential Oil ◽

Antioxidant Activities ◽

Gas Chromatography Mass Spectrometry ◽

Acorus Calamus ◽

Chemical Compositions ◽

Chemical Profiling ◽

Ic50 Value ◽

Sweet Flag ◽

Dpph Scavenging ◽

Dpph Scavenging Assay

Background and Aims: Acorus calamus L. is an indigenous herb in Nepal. It belongs to family Acoraceae and grows in wet land with scented rhizomes. It is also known as Sweet flag in English and commonly as Bojho in Nepal. The present investigation reveals the chemical compositions and antioxidant activity of rhizome essential oil of A. calamus. Methods: Essential oil of rhizomes of Acorus calamus L. from Kaski district, Nepal was extracted by hydrodistillation method and volatile constituents were analyzed Gas chromatography-Mass spectrometry. The antioxidant potential of essential oil was analyzed by 1,1-Diphenyl-2-Picrylhydrazyl (DPPH) scavenging assay. Results: A GC-MS analysis revealed the presence of β-asarone (22.38%), α-asarone (14.97%), 1-(4,6-dimethoxy-2,3-dimethylphenyl ethanone (14.24%), Isoelemicin (5.68%), cis-Methylisoeugenol (4.26%), α-calacorene (4.16%), and other 20 minor components. From DPPH assay, half maximal inhibitory concentration (IC50) value of essential oil was found to be 108.71 µg/mL. Conclusions: These findings have strengthened the A. calamus L. is good source of compounds like β-asarone, α-asarone and can be used as potential antioxidants. BIBECHANA 17 (2020) 89-95

Download Full-text

Nephroprotective and antioxidant activities of ethyl acetate fraction of Euphorbia geniculata Ortega family Euphorbiaceae

Arabian Journal of Chemistry ◽

10.1016/j.arabjc.2020.09.015 ◽

2020 ◽

Vol 13 (11) ◽

pp. 7843-7850

Author(s):

Hanan M. Al-Yousef ◽

Ali S. Alqahtani ◽

Afaf E. Abdel Ghani ◽

Sayed A. El-Toumy ◽

Wagdi I.A. El-Dougdoug ◽

...

Keyword(s):

Ethyl Acetate ◽

Antioxidant Activities ◽

Ethyl Acetate Fraction ◽

Euphorbia Geniculata

Download Full-text

Effect of Extraction Methods on Antioxidant Activity of Papery Skin Extracts and Fractions of Maja Cipanas Onion (Allium cepa L. var. ascalonicum)

The Scientific World JOURNAL ◽

10.1155/2020/3280534 ◽

2020 ◽

Vol 2020 ◽

pp. 1-6

Author(s):

Nyi M. Saptarini ◽

Yulia Wardati

Keyword(s):

Antioxidant Activity ◽

Secondary Metabolites ◽

Ethyl Acetate ◽

Allium Cepa ◽

Ethyl Acetate Fraction ◽

Extraction Process ◽

Extraction Methods ◽

Water Fraction ◽

Percolation Method ◽

Soxhlet Method

Extraction can be carried out at ambient temperature or high temperature to accelerate the extraction process of secondary metabolites from simplicia. This study aimed to determine the effectiveness of extraction methods on antioxidant activity of secondary metabolites of papery skin extracts and fractions of Maja Cipanas onion (Allium cepa L. var. ascalonicum). Extraction methods were maceration, percolation, reflux, and Soxhlet method, and then, concentrated extracts were fractionated by liquid-liquid extraction based on the polarity of secondary metabolites. Antioxidant activity was determined by the DPPH (2,2-diphenyl-1-picrylhydrazyl) method. The phytochemical screening showed that onion papery skin contained alkaloids, polyphenols, flavonoids, and tannins. The IC50 value of the extract, ethyl acetate fraction, and water fraction of the four extraction methods in the concentration range 25–400 μg/mL were in the range of 55.62–107.08, 31.31–84.06, and 126.05–139.82 μg/mL, respectively, while the IAA value was in the ranges of 0.25–0.49, 0.32–0.86, and 0.19–0.21, respectively. Variation in IC50 and IAA values indicate that the extraction method affects antioxidant activity, due to extracted secondary metabolites from simplicia. The highest antioxidant activity was an ethyl acetate fraction by the reflux method, while the lowest was water fraction by the percolation method.

Download Full-text

In Vitro Antioxidant Capacity and Neuronal Cell Toxicity of Roots of Ostericum koreanum Maximowicz

E-Journal of Chemistry ◽

10.1155/2011/183172 ◽

2011 ◽

Vol 8 (3) ◽

pp. 1451-1455

Author(s):

Ramalingam Mahesh ◽

Hyo Won Jung ◽

Jun Hong Park ◽

Yong-Ki Park

Keyword(s):

Cell Viability ◽

Ethyl Acetate ◽

Antioxidant Activities ◽

Radical Scavenging ◽

Neuronal Cell ◽

Ethyl Acetate Fraction ◽

Dependent Manner ◽

Concentration Dependent Manner ◽

Ostericum Koreanum

Ostericum koreanummaximowicz (Umbelliferae), a medicinal herb in Korean Oriental Medicine, has been applied to treat cold, headache, neuralgia and arthralgia. The ethyl acetate fraction ofO. koreanumroot was subjected toin vitroantioxidant activity with different methods for free radical scavenging activities. In addition, the cell viability and nitric oxide release assays were performed here for the first time in neuroblastoma (Neuro-2a) cell cultures. Among all the tested methods, the ethyl acetate fraction was expressed very active, exhibiting a good Trolox equivalent values and IC50, comparable to that of the commercial antioxidants, Trolox and ascorbic acid, respectively. The results showed that there was a reduction of cell viability by the fraction in a concentration dependent manner. These results suggest thatO. koreanumshows good antioxidant activitiesin vitroby inhibiting free radicals. These findings provide a rationale for thein vivotesting. Also, the major constituents behind the antioxidant mechanisms of this fraction warrant further study.

Download Full-text

THE ANTIOXIDANT ACTIVITY AND PHYTOCHEMICAL SCREENING OF ETHANOL EXTRACT, FRACTIONS OF WATER, ETHYL ACETATE AND n-HEXANE FROM MISTLETOE TEA (SCURRULA ATROPURPUREABL. DANS)

Asian Journal of Pharmaceutical and Clinical Research ◽

10.22159/ajpcr.2017.v10i2.15724 ◽

2017 ◽

Vol 10 (2) ◽

pp. 343 ◽

Cited By ~ 4

Author(s):

Resmi Mustarichie

Keyword(s):

Antioxidant Activity ◽

Ascorbic Acid ◽

Ethyl Acetate ◽

Antioxidant Activities ◽

Ethanol Extract ◽

Ethyl Acetate Fraction ◽

Hexane Fraction ◽

Phytochemical Screening ◽

Water Fraction ◽

Ic50 Values

Objective: The aim of this study is to investigate antioxidant activity and phytochemical screening of ethanol extract, fractions of water, ethyl acetate, and n-hexane from mistletoe tea (Scurrula atropurpurea Bl. Dans).Methods: Simplicia extracted using soxhlet equipment with 96% ethanol. Fractionation was conducted using liquid-liquid extraction using a solvent of water, ethyl acetate and n-hexane. Screening of phytochemical and antioxidant activity was performed against these fractions. Antioxidant activity was determined by 2,2-diphenyl-1-picrylhydrazyl method using ultraviolet-visible spectrophotometry with ascorbic acid as standard. Phytochemical screening was conducted based on the method of Farnsworth.Results: The IC50 values of ethanol extract, water fraction, fraction of ethyl acetate, and n-hexane fraction were 21.92 ppm, 89.57 ppm, 14.08 ppm, and 162.09 ppm, respectively, whereas for ascorbic acid was 4.41 ppm. The ethanol extract and ethyl acetate fraction contained compounds were the same group, polyphenolic, tannins, flavonoids, monoterpenoid, steroids, triterpenoids, and quinones. Fraction of water contained compounds such as polyphenolic group, flavonoids, monoterpenoids, sesquiterpenoids, steroids, and triterpenoids. n-hexane fraction compounds contained steroids and triterpenoids.Conclusion: The ethanol extract, water fraction, ethyl acetate fraction, and n-hexane fraction showed antioxidant activities. The ethanol extract, fractions of water, and ethyl acetate fraction contained flavonoids and polyphenolic potential as antioxidants.Keywords: Mistletoe tea, Scurrula atropurpurea, Antioxidant, 2,2-diphenyl-1-picrylhydrazyl, Ascorbic acid.

Download Full-text

Evaluation of Secondary Metabolites and Antioxidant Activity of Water, Ethyl Acetate and Hexane Fractions from the Mangrove Young Leaves Sonneratia alba

Chemical Science International Journal ◽

10.9734/csji/2021/v30i230215 ◽

2021 ◽

pp. 23-32

Author(s):

Verly Dotulong ◽

Djuhria Wonggo ◽

Lita A. D. Y. Montolalu

Keyword(s):

Antioxidant Activity ◽

Secondary Metabolites ◽

Ethyl Acetate ◽

Secondary Metabolite ◽

Antioxidant Activities ◽

Extraction Methods ◽

Water Fraction ◽

Sonneratia Alba ◽

Dpph Method ◽

Young Leaves

The fractions from young leaves of mangrove Sonneratia alba was studied for its associated secondary metabolites and antioxidant activities. The objective of this study was to determine the secondary metabolite components and antioxidant activity of water, ethyl acetate, and hexane fractions of the young leaves of mangrove S. alba. The fraction was obtained from dry powder of young leaf S.alba using continuous fractionation of crude extracts. The crude extract was attained by 2 extraction methods (soxhlet and maceration) and 2 extraction solvents (methanol and ethanol). Secondary metabolites analyses were qualitatively conducted to detect the presence or absence of phenols, flavonoid, tannin, steroid, triterpenoid and alkaloid. Total phenols were measured using Folin Ciocalteau reagents and gallic acid standard curves whereas antioxidant activity were analyzed using DPPH method (1- 1-diphenil-2-picrihydrasil). Results showed that all fractions contained secondary metabolite components tested. The highest rendement was found in the water fraction fromsoxhletation extract with methanol (6.36±0.29%). The total phenol values were found the highest in the ethylacetatefraction from macerated extract with ethanol (352±9.77 mgGAE/g). Stronger antioxidant activity was also found in ethylacetate fraction as indicated by the small value of IC50 DPPH namely the ethylacetate fraction with soxhletation extract with ethanol (3.43±0.25 µg / mL). The results of this study indicate that the semipolar fraction (ethylacetate fraction) has more potential as a source of natural antioxidants.

Download Full-text