@article {2102, title = {Comparison of Antibacterial and Antioxidant Activities of Ethanolic Extracts of Four Plant Species Selected from South of Saudi Arabia}, journal = {Pharmacognosy Journal}, volume = {15}, year = {2023}, month = {August 2023}, pages = {691-696}, type = {Research Article}, chapter = {691}, abstract = {

One of the most ancient human medical techniques is the use of plants to treat, prevent, and cure diseases. These plants can manufacture a wide variety of natural chemicals. The present study aimed to evaluate the antibacterial activity and antioxidant capacity of ethanolic extract of four plant species (Zizyphus lotus, Lavandula dentata, Ruta graveolens, and Dodonaea viscosa). Using disc diffusion and serial dilution procedures, the antibacterial abilities of these EtPEs were evaluated. The antioxidant properties were evaluated by the FRAP method and the Folin-Ciocalteu technique was used to measure the total phenolic content. Different plant extracts showed different inhibitory effects on the tested bacteria in a dose-dependent manner. Among the tested plant extracts, D. viscose exhibited the highest antibacterial activity against P. vulgaris and S. aureus, with a minimum inhibitory concentration (MIC) value of 0.5 mg/ml. On the other hand, R. graveolens displayed the highest quantity of phenolic compounds and demonstrated the highest antioxidant activity. Notably, there was a positive correlation observed between the antioxidant activity of the plant extracts and their total phenolic content. In conclusion, the findings of this study suggest that the tested plant extracts hold potential as promising sources of natural antibacterial and antioxidant agents.

}, keywords = {Antibacterial, Antioxidants, Extraction, Medicinal Plants., Total Phenols}, doi = {10.5530/pj.2023.15.138}, author = {Ali Abdallah Alqudah and Bilal Al Hawamdeh and Dahfer Ali and Ibrahim Alfarrayeh and Bilal Algataitat and Omar Khaled Al-Mobideen and Mohammad Alhawatema} } @article {1918, title = {The Essential Oils Constituent of Etlingera flexuosa (Zingiberaceae), An Endemic Plant from Central Sulawesi}, journal = {Pharmacognosy Journal}, volume = {14}, year = {2022}, month = {December 2022}, pages = {842-846}, type = {Research Article }, chapter = {842}, abstract = {

Introduction: The essential oils from rhizomes, pseudostems, and leaves of Etlingera flexuosa, an endemic ginger species of Sulawesi, were studied. Methods: The essential oils were extracted using solvent extraction and hydrodistillation methods and analysed by gas chromatography-mass spectrometry (GC-MS). Results: The percentage yield of volatile compounds obtained from solvent extraction method was higher than hydrodistillation. By solvent extraction, sesquiterpenes were found abundantly in rhizomes, pseudostems, and leaves with the percentage of 34.16\%, 35.20\% and 32.70\%, respectively. The rhizome and pseudostems were found to contain spathulanol with the high percentage of 3.91\% and 3.46\%. Meanwhile, by hydrodistillation, the compounds were dominated by fatty acid compunds with the percentage of 82.26\%, 82.79\% and 76.1\% on rhizome, pseudostems and leaves. Glycerol tricaprylate has the high percentage of 66.76\% and 82.12\% on rhizome and pseudostems, while in leaves, fatty acids 1,2,3-propanetriyl ester-decanoic acid was the highest with the percentage of 61.81\%. Sesquiterpenes was the second with the percentage of 10.36\%, 11.15\%, and 11.61\% in rhizomes, pseudostems, and leaves, respectively. Conclusion: The most essential oils of E. flexuosa was obtained from the solvent extraction method.

}, keywords = {Essential oils, Etlingera flexuosa, Extraction, GC-MS, Hydrodistillation}, doi = {10.5530/pj.2022.14.177}, author = {Ramadanil Pitopang and Ihwan and Muhammad Sulaiman Zubair and Nurhaeni} } @article {1062, title = {Phytochemical Analysis and Anti-diabetic Activity of Leaf extract of Psydrax horizontalis Schum and Thonn (Rubiaceae)}, journal = {Pharmacognosy Journal}, volume = {12}, year = {2020}, month = {February 2020}, pages = {95-102}, type = {Research Article}, chapter = {95}, abstract = {

Introduction: Rubiacaeae is a large family of flowering plants of 630 genera with over 13000 species widely distributed in the tropical and warm regions of the world. The Psydrax genus has been reported to have various pharmacological activities. Based on ethno-pharmacological information, Psydrax horizontalis Schum. and Thonn. (Bridson) locally known as {\textquotedblleft}Akata-ike{\textquotedblright} in Nsukka is used in the management of diabetes in South-eastern Nigeria. However as at the time of this research, no previous work has been done to investigate its phytochemical constituents and anti-diabetic activity. Methods: The methanol extract (ME) obtained by maceration was analysed for phytochemicals present using standard procedures. Alloxan monohydrate at 150 mg/Kg was used to induce diabetes. Acute toxicity test was done using the Lorke{\textquoteright}s method. The normoglycemic and alloxan-induced groups of twenty animals each were treated orally with 100, 200 and 400 mg/Kg of ME; 5 mg/Kg of glibenclamide and 2 mL/kg of 3\% Tween 80 as the controls. The fasting blood glucose concentrations were monitored at 0, 1, 3 and 6 h, as well as 1st, 3rd and 5th day. Results: Phytochemical screening revealed the presence of glycosides, alkaloids, tannins, flavonoids, steroids, saponins and terpenoids. Median lethal dose was greater than 5000 mg/kg. In the alloxan-induced diabetic rats, significant activity at p\<0.01 on the 6th hour was recorded at doses 100, 200 and 400 mg/Kg ME on day 3. Conclusion: The ME of Psydrax horizontalis possesses significant anti-diabetic activity in the alloxan-induced diabetic rats. The results obtained validate its traditional use in management of diabetes.

}, keywords = {Alloxan monohydrate, Diabetes, Extraction, Flavonoids}, doi = {10.5530/pj.2020.12.15}, author = {Onyekere Peculiar Feenna and Odoh Uchenna Estella and Ezugwu Christopher Obodike} } @article {888, title = {Chemical Composition and Antioxidant Effect of Mentha rotundifolia Extracts}, journal = {Pharmacognosy Journal}, volume = {11}, year = {2019}, month = {May 2019}, pages = {521-526}, type = {Original Article}, chapter = {521}, abstract = {

Aim: This report was aimed to investigate both the chemical composition and the antioxidant activity of two extracts from Mentha rotundifolia aerial parts. Methods: Aqueous and acetonic extracts were obtained by decoction and Soxhlet apparatus, respectively. Total polyphenols contents were determined using Folin- Ciocalteu reagent whereas flavonoids were evaluated by AlCl3 method. LC-MS/MS method was carried out to reveal the phytochemical composition of extracts. Some tests were used to evaluate the in vitro antioxidant activity of extracts such as DPPH free radical scavenging assay, ABTS+ radical cation decolorization assay, OH{\textbullet} radical scavenging assay, ferrous ion chelating, reducing power and β-caroten/linoleic acid bleaching assay. Results: The results showed that the aqueous extract was richer on polyphenols and flavonoids comparing to the acetonic extract. The analysis by LC-MS/MS allowed to identify many phenolic compounds in extracts, predominated by rosmarinic acid. In addition, the extracts were found to possess a significant antioxidant activity. Conclusion: Accordingly, it can be concluded that M. rotundifolia is quite rich in phenolic compounds and has a good antioxidant activity.

}, keywords = {antioxidant activity, Extraction, LC-MS/MS, Mentha rotundifolia, Phenolic compounds}, doi = {10.5530/pj.2019.11.83}, author = {Ferdjioui Siham and Belhattab Rachid and Raed M Al-Zoubi} } @article {214, title = {Study on Silybum marianum Seed through Fatty Acids Comparison, Peroxide Tests, Refractive Index and Oil Percentage}, journal = {Pharmacognosy Journal}, volume = {8}, year = {2016}, month = {September 2016}, pages = {595-597}, type = {Original Article}, chapter = {595}, abstract = {

In this study, milk thistle seeds were collected from four regions of Iran (Ahvaz, Lorestan, Kazeroon and Zarghan). The oil extracted from seeds of plant using n-hexane solvent extraction soxhlet. The extracted oil was analyzed by gas chromatography and fatty acids were identified in all four samples. In all four samples, the oil refractive index of Milk thistle oil fatty acids vis. Linoleic acid, Oleic acid, Palmitic acid was evaluated. The Peroxide test and determination of oil percentage was performed in Milk thistle seed oil.

}, keywords = {Extraction, Fatty Acids, Milk Thistle, Oil, Peroxide}, doi = {10.5530/pj.2016.6.13}, author = {Iman Nasrollahi and Ebrahim Talebi and Zahra Nemati} }