Update public/engineering

public/engineering

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-					<h2 class="heading text-primary"><b>Design</b></h2>
+					<h2 class="heading text-primary"><b>Design*</b></h2>
 					<h3>Introduction</h3>
 					<p>Our proposed aptamer based kit apt4uti kit is an engineered syn-bio device that can be used to
 						detect urinary tract infections in minutes with higher sensitivity and specificity. Aptamer is
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 								<h3>Biology softwares:</h3>
 								<p>For the cloning experiment and aptamer designing, we got hands on experience of snapgene and pymol for the designing of plasmid with our insert and simulation of FimH and aptamers respectively.</p>
 
-								<h2 style="margin-top: 3rem;"><b>References:</b></h2>
+								<h2 style="margin-top: 3rem;"><b>*References:</b></h2>
 								<ol>
 									<li>Wan, Q., Liu, X. and Zu, Y. (2021). Oligonucleotide aptamers for pathogen detection and infectious disease control. Theranostics, 11(18), pp.9133–9161. DOI: <a href="https://doi.org/10.7150/thno.61804">10.7150/thno.61804</a></li>
 									<li>Schembri, M.A., Hasman, H. and Klemm, P. (2000). Expression and purification of the mannose recognition domain of the FimH adhesin. FEMS Microbiology Letters, 188(2), pp.147–151. DOI: <a href="https://doi.org/10.1111/j.1574-6968.2000.tb09186.x">10.1111/j.1574-6968.2000.tb09186.x</a>