scholarly journals Determination of Phenolics and Flavonoids of Some Useful Medicinal Plants and Bioassay-Guided Fractionation Substances of Sclerocarya birrea (A. Rich) Hochst Stem (Bark) Extract and Their Efficacy Against Salmonella typhi

2021 ◽  
Vol 9 ◽  
Author(s):  
Muhammad Salihu Abdallah ◽  
Muskhazli Mustafa ◽  
Meenakshii A/P. Nallappan ◽  
Sangho Choi ◽  
Jin-Hyub Paik ◽  
...  
Keyword(s):  
Medicinal Plants ◽  
Ethyl Acetate ◽  
Ethyl Acetate Fraction ◽  
Stem Bark ◽  
Salmonella Typhi ◽  
Bark Extract ◽  
Sclerocarya Birrea ◽  
Bioassay Guided Fractionation ◽  
Stem Bark Extract ◽  
Phenolic And Flavonoid

Gallic acid and catechin are the most abundant phenolic and flavonoid contents found in all plant extracts. The contents and the bioassay-guided fractionating substances of the Sclerocarya birrea (A. Rich) Hochst (Anacardiaceae) fraction played vital roles. The goals of the study were to determine the contents of some useful medicinal plants and the bioassay-guided fractionation substances of S. birrea fraction compounds capable of acting against Salmonella isolate using LC-MS/LC-HRMS (Dionex ultimate 3000 RS UPLC with Thermo Scientific Q Exactive Orbitrap Hybrid Tandem Mass Spectrometer). The Folin–Ciocalteu reagent procedure and flavonoid content determination were conducted spectrophotometrically. Bioassay-guided fractionation, chronological partitioning, and screening of the antibacterial action against Salmonella typhi were performed. The ethyl acetate fraction extracts of S. birrea stem (bark) extract were analyzed using LC-MS/LC-HRMS. The gallic acid content increased tremendously in Vachellia nilotica (L.) P.J.H. Hurter and Mabb (Fabaceae) pod extracts with curve fitting (R2 = 0.9958). Catechin content increase was significantly increased in S. birrea stem (bark) extracts followed by that of V. nilotica pod extracts with curve fitting (R2 = 0.9993); they were all significantly different in the Guiera senegalensis J.F. Gmel. and the Leptadenia lanceolata (Poir.) Goyder leaves extracts at p value <0.0001. Subsequently, 10 mg/ml of S. birrea stem (bark) ethyl acetate fraction extract was the MIC, where no MBC was recorded and susceptible to the positive control with the highest inhibition zone, followed by the ethyl acetate fraction extract at 10 mg/ml (9.7 ± 0.0) at Turkey’s p < 0.0001. Vidarabine is one of the novel compounds, specifically having antimicrobial actions, found in the S. birrea stem (bark). Reasonable amounts of phenolic and flavonoid contents determined the actions of the individual plant extract.

scholarly journals Antibacterial Potentials of Compounds Isolated from the Stem Bark Extract of Sclerocarya birrea (A. Rich, Hochst.)

2019 ◽  
Vol 19 (3) ◽  
pp. 210-216
Author(s):  
Abubakar Abdulhamid ◽  
Ibrahim Sani ◽  
Isah Musa Fakai ◽  
Ibrahim Hamza Kankiya ◽  
Tijjani Salihu Shinkafi
Keyword(s):  
Stem Bark ◽  
Bark Extract ◽  
Sclerocarya Birrea ◽  
Stem Bark Extract

scholarly journals Comparative Phytochemical and in vitro Antioxidant Screening of the Root and Stem Bark of Annona muricata Linn

2020 ◽  
pp. 48-61
Author(s):  
C. E. Anarado ◽  
F. M. Chukwubueze ◽  
C. J. O. Anarado ◽  
N. L. Umedum ◽  
C. B. Nwanya
Keyword(s):  
Ethyl Acetate ◽  
Antioxidant Activities ◽  
Antioxidant Properties ◽  
Solvent Polarity ◽  
Stem Bark ◽  
Bark Extract ◽  
Root Extract ◽  
Annona Muricata ◽  
Stem Bark Extract

Aim: To compare the phytochemicals and antioxidant activities of stem bark and root extracts of Annona muricata. Methodology: The stem bark and root of Annona muricata were collected, washed, air-dried, ground and each extracted with methanol, ethyl acetate and n-hexane. The extracts were analysed for the presence of phytochemicals. Antioxidant screening was also carried out on the samples. Results: Cardiac glycosides were present in all the extracts of both root and stem bark. Alkaloids were present in moderate abundance in all the extracts except the ethyl acetate stem bark extract. Saponins and tannins were found in methanol extracts of both parts and also in very high abundance but the stem contained higher amount of saponins while alkaloids and tannins were found more in the root. Flavonoids were only found in the ethyl acetate stem bark extract.  Steroids were absent in all the extracts except n-hexane root extract. The root showed greater enzymatic antioxidant activities than the stem bark. The solvent polarity affected the phytochemical found in each extract.  The antioxidant activities of the catalase, superoxidase dismutase and glutathione peroxidase were significantly higher in the root of Annona muricata than in the stem. Conversely, peroxidase showed a significantly higher activity in the stem than in the root. Conclusion: The stem bark and root exhibited good antioxidant properties, so there is need to isolate the compounds responsible for antioxidant property exhibited by the plant parts.

scholarly journals Antimicrobial activities of extracts from Urtica urens

Food Research ◽  
2020 ◽  
Vol 4 (5) ◽  
pp. 1487-1492
Author(s):  
M.K. Pillai ◽  
R.P. Matamane ◽  
S.B. Mekbib
Keyword(s):  
Escherichia Coli ◽  
Ethyl Acetate ◽  
Leaf Extract ◽  
Stem Bark ◽  
Antimicrobial Activities ◽  
Bark Extract ◽  
Root Extract ◽  
Fungal Isolates ◽  
Stem Bark Extract ◽  
Urtica Urens

The antibacterial and antifungal activities of various extracts from Urtica urens were evaluated against selected microorganisms using agar hole-plate diffusion method. A total of ten extracts namely U. urens hexane leaf extract (HLE), chloroform leaf extract (CLE), ethyl acetate leaf extract (ELE), methanolic leaf extract (MLE), hexane stem-bark extract (HSB), chloroform stem-bark extract (CSB), ethyl acetate stem-bark extract (ESB), methanolic stem-bark extract (MSB), chloroform root extract (CRT) and methanolic root extract (MRT) were prepared. These extracts were evaluated against two Gram-positive bacteria viz. Listeria monocytogenes and Staphylococcus aureus, four Gram-negative bacteria viz. Serratia marcescens, Pseudomonas aeruginosa, Escherichia coli (wild strain) and Escherichia coli (O157:H7) and two fungal isolates viz. Candida albicans and Penicillium digitatum. The inhibition zones of these extracts were found to be in the range of 9.0±0.0 to 40.5±0.7 mm against bacterial isolates and 16.0±4.2 to 17.5±4.9 mm against C. albicans. However, all these extracts exhibited no visible zone of inhibition against P. digitatum. Additionally, the minimum inhibitory concentrations (MICs) of these extracts were also determined and were found to be in the range of <31.25 to >1000 µg/mL against both bacterial and fungal isolates. From this study, we concluded that ELS, MLE, CRT and MRT showed promising antimicrobial activities.

scholarly journals AKTIVITAS INHIBISI ENZIM ALFA-GLUKOSIDASE DARI EKSTRAK KULIT BATANG BUNGA KUPU-KUPU (Bauhinia semibifida Roxb) SECARA IN VITRO

2021 ◽  
Vol 6 (2) ◽  
pp. 223-231
Author(s):  
Haiyul Fadhli ◽  
◽  
Nofri Hendri Sandi ◽  
Ainun Nurain Nurdin
Keyword(s):  
Ethyl Acetate ◽  
Inhibitory Activity ◽  
Stem Bark ◽  
Positive Control ◽  
Bark Extract ◽  
In Vitro Testing ◽  
Ic50 Value ◽  
Microplate Reader ◽  
Stem Bark Extract

Research on the activity of ?-glucosidase inhibition of Bunga Kupu-Kupu stem bark extract (Bauhinia semibifida Roxb) has been carried out in vitro. This study aims to determine the inhibitory activity of the extracts of B. semibifida Roxb. stem bark against the ?-glucosidase enzyme in vitro. Testing the inhibitory activity of the ?-glucosidase enzyme using extracts of n-hexane, ethyl acetate, and methanol from the stem bark of the Bunga Kupu-Kupu and the Akarbose as a positive control. In vitro testing was carried out using a microplate reader instrument with a wavelength of 410 nm. The results showed that the extract of n-hexane extract of the B. semibifida stem bark had an IC50 value 15,625 µg/mL, ethyl acetate extract had an IC50 value 35,495 µg/mL, and the methanol extract had an IC50 value 34,279 µg/mL. By category, the three B. semibifida stem bark extracts have the active ability to inhibit the ?-glucosidase enzyme, while the Akarbose had an IC50 value 0,384 µg/mL as a positive control has a very active ability as an antidiabetic through the inhibition of the ?-glucosidase enzyme. The results showed that extraction of ?-glucosidase inhibitor compound with n-hexane yielded extract with highest inhibitor activity.

scholarly journals ANTIOXIDANT ACTIVITY OF ETHYL ACETATE EXTRACT OF NUTMEG (Myristica fragrans Houtt) STEM BARK

2019 ◽  
Vol 19 (3) ◽  
pp. 58-63
Author(s):  
Ilham Maulana ◽  
Binawati Ginting ◽  
Nurdin Nurdin ◽  
Saiful Fakri
Keyword(s):  
Antioxidant Activity ◽  
Ethyl Acetate ◽  
Ethyl Acetate Extract ◽  
Stem Bark ◽  
Bark Extract ◽  
Test Results ◽  
Myristica Fragrans ◽  
Ic50 Value ◽  
Stem Bark Extract ◽  
Myristica Fragrans Houtt

Antioxidant activity test for the extract of ethyl acetate nutmeg stem bark (Myristica fragrans Houtt) was carried out using 2,2-diphenyl-1picrylhydrazil (DPPH). The test results of antioxidant activity of ethyl acetate nutmeg stem bark extract with DPPH method at a concentration of 25 ppm, 50 ppm and 100 ppm obtained IC50 value = 68.14 ppm with IC50 value of vitamin C (as positive control) 3.657 ppm. The results of column chromatographic separation of ethyl acetate nutmeg stem bark extract obtained 5 combined fractions namely MFEK 1, MFEK 2, MFEK 3, MFEK 4 and MFEK 5. The test results of the fraction antioxidant activity in a good category were the MFEK 1 fraction. The MFEK 2 fraction to MFEK 5 showed an antioxidant activity lower than compared  to the ethyl acetate extract. This shows that the ethyl acetate nutmeg stem bark extract has a better inhibitory activity, because there are several active compounds contained in the extract which can inhibit free radicals, so the IC50 value of the extract is better than the fractions.

scholarly journals Cardioprotective Effect of Croton macrostachyus Stem Bark Extract and Solvent Fractions on Cyclophosphamide-Induced Cardiotoxicity in Rats

2020 ◽  
Vol 2020 ◽  
pp. 1-13 ◽  
Author(s):  
Muluken Altaye Ayza ◽  
Rajkapoor Balasubramanian ◽  
Abera Hadgu Berhe
Keyword(s):  
Free Radical ◽  
Ethyl Acetate ◽  
Crude Extract ◽  
Radical Scavenging ◽  
Stem Bark ◽  
Free Radical Scavenging ◽  
Assay Method ◽  
Bark Extract ◽  
Croton Macrostachyus ◽  
Stem Bark Extract

Context. Croton macrostachyus Hochst. ex Delile (Euphorbiaceae) has been used in traditional medicine to manage heart failure and other heart diseases in Ethiopia. Objective. To evaluate the antioxidant and cardioprotective activities of stem bark extract and solvent fractions of Croton macrostachyus on cyclophosphamide-induced cardiotoxicity in rats. Materials and Methods. DPPH free radical scavenging assay method was used to determine antioxidant activity whereas Sprague-Dawley rats were used to evaluate the cardioprotective activity. Except for the normal control, all groups were subjected to cyclophosphamide (200 mg/kg, i.p.) toxicity on the first day. Enalapril at 10 mg/kg was used as a reference. The hydromethanolic crude extract (100, 200, and 400 mg/kg) and aqueous and ethyl acetate fractions (100 and 200 mg/kg, each) were administered for 10 days. The cardioprotective activities were evaluated using cardiac biomarkers such as Troponin I, aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), total cholesterol (TC), triglyceride (TG), and histopathological studies of heart tissue. Results. Crude extract and ethyl acetate and aqueous fractions exhibited free radical scavenging activities at IC50 of 594 μg/mL, 419 μg/mL, and 716 μg/mL, respectively. Crude extract at 400 mg/kg decreased the levels of troponin, AST, ALT, and ALP to 0.29 ± 0.06 ng/mL, 103.00 ± 7.63 U/L, 99.80 ± 6.18 U/L, and 108.80 ± 8.81 U/L, respectively. In addition, ethyl acetate fraction at 200 mg/kg decreased the levels of troponin, AST, ALT, and ALP to 0.22 ± 0.02 ng/mL, 137.00 ± 14.30 U/L, 90.33 ± 6.13 U/L, and 166.67 ± 13.50 U/L, respectively, compared with the cyclophosphamide control group. Conclusions. Croton macrostachyus possesses cardioprotective activities and it could be a possible source of treatment for cardiotoxicity induced by cyclophosphamide.

scholarly journals Comparative study on the antimicrobial activity of partitioned fractions of the stem-bark of ceiba pentandra (bombacaceae)

2015 ◽  
Vol 05 (04) ◽  
pp. 004-008
Author(s):  
Njinga N. S. ◽  
Sule M. I. ◽  
Pateh U. U. ◽  
Hassan H. S. ◽  
Ache R. N. ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Ethyl Acetate ◽  
Wide Spectrum ◽  
Ethyl Acetate Fraction ◽  
Stem Bark ◽  
Salmonella Typhi ◽  
Klebsiella Pneumonia ◽  
Butanol Extract ◽  
Ceiba Pentandra ◽  
Zones Of Inhibition

AbstractDue to the emergence of more and more drug resistance bacteria and the reported antibacterial activity of Ceiba pentandra, the antimicrobial activity of the partitioned ethyl-acetate and n-butanol fractions of the stem-bark of this plant were carried out on the following clinical isolates: Staphylococcus aureus; Streptococcus pyrogenes; corynebacterium ulcereans; Escherichia coli; Salmonella typhi; Shigella dysenterea; Enterococcus aerogenes; Pseudomonas aeruginosa; klebsiella pneumonia and the fungi Trichophytom rubrum, Microsporum sp., Aspergillus fumigatus and Aspergillus niger. Agar diffusion and broth delusion methods were used in this study. The ethyl acetate fraction showed wide spectrum antibacteria activity (with zones of inhibition between 27mm and 37mm) while the n-butanol extract showed activity only against the gram negative bacteria (zones of inhibition between 20mm and 21mm). The MIC ranged from 0.65 to 2.5 mg/ml and 2.5 to 5 mg/ml and MBC ranged from 2.5 mg/ml and 5 – 10 mg/ml for the ethylacetate and n-butanol respectively. Both fractions showed no activity against the fungi used in this study. The preliminary phytochemistry of the ethyl acetate showed the presence of only flavonoid and this may explain the activity against all the bacteria. The n-butanol showed the presence of carbohydrates, saponins, tannins and cardiac glycoside and the absence of flavonoid and alkaloids. This study justifies the use of this plant in herbal medicine.

scholarly journals Anxiolytic and Antidepressant Effects of Maerua angolensis DC. Stem Bark Extract in Mice

2018 ◽  
Vol 2018 ◽  
pp. 1-17
Author(s):  
Charles Kwaku Benneh ◽  
Robert Peter Biney ◽  
Donatus Wewura Adongo ◽  
Priscilla Kolibea Mante ◽  
Felix Agyei Ampadu ◽  
...  
Keyword(s):  
Ethyl Acetate ◽  
Petroleum Ether ◽  
Elevated Plus Maze ◽  
Stem Bark ◽  
Bark Extract ◽  
Analgesic Effects ◽  
Traditional Remedy ◽  
Plus Maze ◽  
Antidepressant Effects ◽  
Stem Bark Extract

Introduction. The stem bark extract of Maerua angolensis DC. (Capparaceae) is used as a traditional remedy for management of anxiety, psychosis, and epilepsy. Aim of the Study. We therefore aimed at evaluating the anxiolytic and antidepressant potential of the plant in mice models. Methods. The dried stem bark was extracted with petroleum ether/ethyl acetate (50:50) mixture to obtain the extract, MAE. We employed Irwin’s test to identify the preliminary behavioral and autonomic effects. Subsequently, MAE was administered per os to male mice and subsequently assessed, 1 h later, for anxiety parameters in the elevated plus maze (EPM) and the regular Suok tests. The forced swim (FST) and tail suspension (TST) tests were employed to assess the antidepressant potential of the extract (100-1000 mg kg−1). Results. In our preliminary assay, MAE (100-5000 mg/kg) exhibited analgesic effects and a reduction in fear response in the Irwin’s test. The spontaneous locomotor activity was reduced at 1000 mg/kg. Additionally, MAE (1000 mg/kg) increased the latency to PTZ-induced convulsions, and duration to sleep in the pentobarbitone induced sleeping time assay. MAE (1000 mg/kg), similar to diazepam, in the anxiolytic assay, increased the percentage time spent in the open arms while decreasing protected head dips and unprotected stretch attend postures in the EPM. Correspondingly, there was a reduction in anxiety-induced immobility and freezing in the Suok test (300 mg/kg) without loss of sensorimotor coordination. Additionally, there was a significant reduction in immobility duration in the FST (300 mg/kg) and TST (1000 mg/kg). Conclusion. The petroleum ether/ethyl acetate fractions of Maerua angolensis stem bark possess anxiolytic and acute antidepressant effects in mice.

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