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RISS 인기검색어
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- 저자 : Biechele-Speziale, Dana (검색결과 4 건)
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Biechele-Speziale, J.,Huy, B.T.,Nguyen, T.T.T.,Vuong, N.M.,Conte, E.,Lee, Y.I. Academic Press 2017 Microchemical Journal Vol. No.
<P>A new approach with simple, fast and most versatile at low synthetic temperature is proposed for producing carbon nitride nanoparticles using ammonium citrate as both the nitrogen source and the framework for the formation of carbon nitride via solid state reaction. The prepared products are water soluble with high quantum yields of 27%. The initial assessments for optosensing of mercury ions and bisphenol A were performed based on the change in fluorescent intensity of the developed product. The mercury ions could be detected with a limit of detection of 60 nM with high selectivity based on the quenching effect. The detection on Bisphenol-A was carried out using 'off-on' technique of fluorescent intensity with a limit of detection of 45 nM. (C) 2017 Published by Elsevier B.V.</P>
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Tawfik, Salah M.,Shim, Jimin,Biechele-Speziale, Dana,Sharipov, Mirkomil,Lee, Yong-Ill Elsevier Sequoia 2018 Sensors and actuators. B Chemical Vol.257 No.-
<P><B>Abstract</B></P> <P>Novel “turn off-on” optosensors based on amphiphilic thiophene copolymers coated CdTe quantum dots (P1QDs and P2QDs) were developed for the dual detection of heparin and spermine. The emission of the P1QDs and P2QDs is found to be quenched in the presence of heparin by electron transfer mechanism through electrostatic and hydrogen bonding interactions. Upon the addition of spermine, heparin has been removed from the surface of P1QDs and P2QDs due to the strong electrostatic interactions between spermine and heparin, which showed significant fluorescence recovery of the sensors. Under optimum conditions, both P1QDs and P2QDs sensors displayed excellent limits of detection for heparin of 1.59nmolL<SUP>−1</SUP> (R<SUP>2</SUP> =0.9955) and 0.88nmolL<SUP>−1</SUP> (R<SUP>2</SUP> =0.9908) with linear ranges of 1–11μmolL<SUP>−1</SUP> and 1–10μmolL<SUP>−1</SUP>, respectively. P1QDs and P2QDs also showed remarkable limits of detection for spermine of 2.90nmolL<SUP>−1</SUP> (R<SUP>2</SUP> =0.9957) and 1.66nmolL<SUP>−1</SUP> (R<SUP>2</SUP> =0.9928) with linear ranges of 0.05–15μmolL<SUP>−1</SUP> and 1–12μmolL<SUP>−1</SUP>, respectively. The P1QDs and P2QDs sensors show a high selectivity to heparin and spermine over common interfering substances and ions. In addition, the proposed method was successfully utilized in serum samples, which could facilitate the further heparin and spermine biochemical and biomedical research.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Novel CdTe QDs coated with amphiphilic conjugated polythiophenes were developed. </LI> <LI> Highly fluorescent P1QDs and P2QDs (QY, 63% and 78%) were used as “turn off–on” sensors. </LI> <LI> The sensors show highly selective and sensitive responses to heparin and spermine. </LI> <LI> The sensors were successfully applied to detect heparin and spermine in human serum. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
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Tawfik, Salah M.,Sharipov, Mirkomil,Huy, Bui The,Gerelkhuu, Zayakhuu,Biechele-Speziale, Dana,Lee, Yong-Ill Elsevier 2018 Journal of industrial and engineering chemistry Vol.57 No.-
<P><B>Abstract</B></P> <P>Naturally modified nonionic alginate-based polymers were synthesized to act as functionalizing agents for upconversion nanoparticles (UCNPs). The synthesized polymer-UCNPs hybrid nanoparticles show high stability, excellent biocompatibility and enhanced luminescence intensity for NIR imaging. Additionally, our results show that due to the large cavities of the materials and amphiphilic polymer shell, these nonionic alginate-functionalized UCNPs were able to load the anticancer drug doxorubicin (DOX) with the exceptional efficiency as well as release it in a highly controlled and selective pH-responsive manner via folate receptor-mediated endocytosis. Targeting using this multifunction polymer significantly improved the capability of DOX-loaded UCNPs to inhibit the growth of KB cancer cells than free DOX. These biocompatible nonionic alginate-functionalized UCNPs hold substantial potential as effective anticancer drug-delivery carriers and NIR imaging agents.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Novel biocompatible amphiphilic alginates for functionalizing UCNPs are developed. </LI> <LI> The functionalized-UCNPs possess high stability and less cytotoxicity. </LI> <LI> Functionalized-UCNPs enhanced bioimaging and specific in targeting KB cancer cells. </LI> <LI> Novel UCNP is potentially capable of pH responsive targeted DOX to cancer cell. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
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Salah M. Tawfik,Mirkomil Sharipov,Buithehuy,Zayakhuu Gerelkhuu,Dana Biechele-Speziale,이용일 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.57 No.-
Naturally modified nonionic alginate-based polymers were synthesized to act as functionalizing agentsfor upconversion nanoparticles (UCNPs). The synthesized polymer-UCNPs hybrid nanoparticles showhigh stability, excellent biocompatibility and enhanced luminescence intensity for NIR imaging. Additionally, our results show that due to the large cavities of the materials and amphiphilic polymershell, these nonionic alginate-functionalized UCNPs were able to load the anticancer drug doxorubicin(DOX) with the exceptional efficiency as well as release it in a highly controlled and selectivepH-responsive manner via folate receptor-mediated endocytosis. Targeting using this multifunctionpolymer significantly improved the capability of DOX-loaded UCNPs to inhibit the growth of KB cancercells than free DOX. These biocompatible nonionic alginate-functionalized UCNPs hold substantialpotential as effective anticancer drug-delivery carriers and NIR imaging agents.
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