@article{Srinivasulu_Pavan Kumar_Aruna Kumar_Venkateswara Rao_Vidyadhara_Ramesh Babu_2022, title={Evaluation of the Antibacterial Activity of Isolated Anthraquinones from the Root of <i>Rubia cordifolia</i> Linn}, volume={27}, url={https://www.informaticsjournals.com/index.php/toxi/article/view/26169}, DOI={10.18311/ti/2020/v27i3&4/26169}, abstractNote={The present study was intended to screen the antibacterial activity of anthraquinones i.e. 2-Methyl Anthraquinone (MAQ) and Quinizarine (QNZ), isolated from roots of &lt;em&gt;Rubia cordifolia&lt;/em&gt; Linn. Minimum Inhibitory Concentration (MIC) of isolated anthraquinones was evaluated against selected gram-positive [&lt;em&gt;Bacillus subtilis&lt;/em&gt; (BS) and&lt;em&gt; Staphylococcus aureus&lt;/em&gt; (SA)] and gram-negative [&lt;em&gt;Serratia marcescens&lt;/em&gt; (SM) and &lt;em&gt;Escherichia coli&lt;/em&gt; (EC)] bacterial strains. The MIC was determined by micro broth dilution method using Tryptone Soya Broth (TSB) in 96 well plates as well as by measuring zone of inhibition using nutrient agar medium by the cup-plate method. Absorbance values after micro broth dilution revealed the significant MIC of MAQ as 40 μg/mL against BS, 40 μg/mL of MAQ against SA and 80 μg/mL of MAQ against SM. Whereas, The MIC of QNZ was 20 μg/mL against EC. Percentage zone of inhibition after cup-plate method revealed the significant MIC of MAQ as 39.8% against BS when compared with vancomycin, 88.33% against SA when compared with linezolid, 53.37% against SM when compared with amikacin. Whereas, percentage zone of inhibition revealed the significant MIC of QNZ as 53.76% against EC when compared with ciprofloxacin. Based on the MIC results after both micro broth dilution and cup-plate method, we observed that MAQ has shown considerable antibacterial activity against selected bacteria.}, number={3&amp;4}, journal={Toxicology International}, author={Srinivasulu, Pottella and Pavan Kumar, Padarthi and Aruna Kumar, Ch and Venkateswara Rao, J. and Vidyadhara, S. and Ramesh Babu, Janga}, year={2022}, month={Aug.}, pages={193–201} }