@article {1284, title = {Determination of Polyphenolic content and Antioxidant Activity from Various Extracts of Boerhaavia diffusa Linn Root: An in vitro Approach for Selection of Appropriate Extracting Solvent}, journal = {Pharmacognosy Journal}, volume = {12}, year = {2020}, month = {November 2020}, pages = {1578-1585}, type = {Original Article}, chapter = {1578}, abstract = {

Objective: This study is aimed to evaluate extraction capacity of different solvents (toluene, dichloromethane, chloroform, ethyl acetate, ethanol, methanol, water, 60\% aqueous methanol, 60\% aqueous ethanol and 60\% aqueous acetone) and its effect on total phenolic content, total flavonoid content, and antioxidant assay. Methods: Extraction was performed from dried root powder of Boerhavia diffusa using various solvents at 25oC on magnetic sirr (300 rpm). Extraction yield, total phenolic content, total flavonoid content and total tannin content of the extracts were determined spectrophotometrically using gallic acid, quercetin as standards. Antioxidant potential determines by using various in vitro methodologies such as DPPH, FRAP, and ABTS assay. Result: The 60\% aqueous methanol showed the highest extracting yield, in contrast, toluene and hexane showed the lowest yield. Highest total phenolic content (239.8{\textpm}0.25 mg GAE/g) and total flavonoid content (131.1{\textpm}4.20 mg QCE/g), were found from methanolic extract. While, acetone extract showed highest tannin content. The Methanolic extract of Boerhaavia diffusa exhibited the highest antioxidant activity. Conclusions: The highest correlation was found between phenolic content and the antioxidant assay. It seems that phenolic contents are responsible for free radicle scavenging activity. From the observation, it concluded that methanolic extract rich with polyphenolic content and acetone extract showed the highest amount of tannin content.

}, keywords = {ABTS, Boerhavia diffusa, crude extract, DPPH, Free radicles, total phenolic content}, doi = {10.5530/pj.2020.12.216}, author = {Monika Bhalodiya and Jayant Chavda and Nilesh Patel and Ravi Manek and Ajay Patel and Sheetal Faldu} } @article {856, title = {Antibacterial Activity of Carica papaya Leaves and Allium sativum Cloves Alone and in Combination against Multiple Strains}, journal = {Pharmacognosy Journal}, volume = {11}, year = {2019}, month = {May 2019}, pages = {600-602}, type = {Original Article}, chapter = {600}, abstract = {

Aim: Screening of natural extracts is a focused intensive study that aims to find active principles sorted from plant resources both safe and environmental friendly. The present study was aimed to evaluate the antibacterial activity of direct crude extracts of Carica papaya leaves and Allium sativum cloves alone and in combination against multiple drug resistant strains. Methods: Two Gram positive (Staphylococcus aureus and Bacillus cereus) and three strains of Gram negative (Escherichia coli, Salmonella typhi and Pseudomonas aeruginosa) bacteria were used to evaluate the antibacterial activity of Carica papaya leaves and Allium sativum using Agar Disk Diffusion Method. Results: The results of this study showed that both extracts showed moderate antibacterial activity against the test bacterial strains and the potency of the extracts was increased when these two extracts were combined. Conclusion: These extracts directly can be used as natural alternative preventives to control various food poisoning diseases and preserve food stuff avoiding healthy hazards of chemically antimicrobial agent applications.

}, keywords = {Allium sativum cloves, Antibacterial activity, Bacillus cereus, Carica papaya leaves, crude extract, Escherichia coli, Pseudomonas aeruginosa, Salmonella typhi, Staphylococcus aureus}, doi = {10.5530/pj.2019.11.95}, author = {Srividya Lonkala and A. Rama Narsimha Reddy} } @article {1036, title = {Phytochemical Constituents and Antioxidant Activities of Crude Extracts from Acacia Senegal Leaf Extracts}, journal = {Pharmacognosy Journal}, volume = {11}, year = {2019}, month = {November 2019}, pages = {1409-1414}, type = {Original Article}, chapter = {1409}, abstract = {

Background: Acacia senegal (Fabaceae) Wild is a leguminous tree with economic values, but its leaves are under-utilised. Objective: To investigate the phytochemical constituents and antioxidant potential of crude extracts from A. Senegal{\textquoteright}s leaves. Methods: Methanol and acetone crude extracts of leaves of A. senegal were prepared by maceration using organic solvents, methanol and acetone respectively. Qualitative and quantitative phytochemical analysis of the crude extracts were evaluated using Association of Agricultural and Chemist (AOAC) protocols. Antioxidant activities of the crude extracts were determined using 2, 2'-azino-bis-(3-ethylbenzothiazoline-6-sulphonic acid (ABTS) and 2, 2-diphenyl-1-picrylhydrazyl (DPPH) respectively. Results: The crude extracts (acetone and methanol) showed vary quality of phytochemical constituent including flavonoid, alkaloids, carbohydrate, saponins, tannin, steroids, and terpenoids. Acetone crude possessed significant (P \< 0.05) higher total flavonoid and proanthocyanidin content in comparison with methanol extracts. Whereas, methanol crude extract possessed significant higher total phenol content compared with acetone crude extract. The crude extracts showed antioxidant activities as evidence in scavenging ABTS and DPPH radicals. However, acetone crude with lower IC50 of 0.09 mg/mL possessed significant higher ABTS scavenging ability compared to methanol (0.07 mg/mL) and ascorbic acid (0.07 mg/mL). Conclusion: The crude extracts could serve as a promising natural antioxidant agent in management of oxidative stress diseases. For further studies, bioactive compounds need to be ascertained.

}, keywords = {ABTS, Acacia Senegal, Antioxidants, crude extract, DPPH, Free Radicals}, doi = {10.5530/pj.2019.11.218}, author = {Edwina O Uzunuigbe and Foluso O Osunsanmi and Priscilla Masamba and Rebamang A Mosa and Rebamang A Mosa and Andrew R Opoku and Abidemi P Kappo} }