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Plasmonic organic electrochemical transistors for enhanced sensing

Nano Research 2023年第2期16卷 3201-3206页

作者： Jinxin Li Foram Madiyar Sahil Ghate kowsik sambath kumar Jayan Thomas CREOL The College of Optics and PhotonicsUniversity of Central FloridaOrlandoFL 32816USA NanoScience Technology Center University of Central FloridaOrlandoFL 32816USA Aerospace Boulevard Embry-Riddle Aeronautical UniversityDaytona BeachFL 32114USA Department of Materials Science and Engineering University of Central Florida OrlandoFL 32816USA

Organic electrochemical transistors(OECTs)have been hailed as highly sensitive biomolecular sensors among organic electronic devices due to their superior stability in an aqueous environment and high *** the same time,plasmon based sensors are known to provide high sensitivity for biosensing due to the highly localized plasmonic *** we report a plasmonic OECT(POET)device that synchronizes the advantages of OECTs and plasmonic sensors on a single *** platform is fabricated by a simple,cost-effective,and high-throughput nanoimprinting process,which allows plasmonic resonance peak tuning to a given visible wavelength of interest for versatile *** glucose sensing as proof,a five-times sensitivity enhancement is obtained for POET compared to a regular(non-plasmonic)***,the POET paves the way to a new paradigm of optoelectronic sensors that combines the inherent high sensitivity of OECTs and localized plasmonic field to sense a vast realm of biomolecules.

关键词： organic electrochemical transistors(OECTs) plasmonics nanoimprint fabrication glucose sensing plasmonic biosensing

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Antitumor activity and antioxident role of Bauhinia racemosa against Ehrlich ascites carcinoma in Swiss albino mice

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Acta Pharmacologica Sinica 2004年第8期 96-102页

作者： Malaya GUPTA,Upal Kanti MAZUMDER,Ramanathan sambath kumar,Thangavel Siva kumar Department of Pharmaceutical Technology Department of Pharmaceutical Technology Department of Pharmaceutical Technology Department of Pharmaceutical Technology Jadavpur University Kolkata-700 032 India Jadavpur University Kolkata-700 032 India Jadavpur University Kolkata-700 032 India Jadavpur University Kolkata-700 032 India

AIM: To study the enzyme activity of CYP2C18 variant with exon 5 skipped. METHODS: A full length CYP2C18 cDNA X1 and an exon 5 skipped variant CYP2C18 X2 were separately subcloned into mammalian expression vector pREP9 to transfect HepG2 cells. The expression of CYP2C18 mRNA in transgenic cells and human liver tissues were determined by RT-PCR. The enzyme activity of CYP2C18 to oxidate tolbutamide in postmitochondrial supernate (S9) fraction was determined by HPLC. The cytotoxicity of ifosfamide to transgenic cells was evaluated by MTT test. RESULTS: HepG2-CYP2C18 X1 cells showed strong expression of the full length CYP2C18 mRNA. On the other hand, HepG2-CYP2C18 X2 cells had only infinitesimal expression of the exon-skipped CYP2C18 as well as the full length CYP2C18, while non-transfected HepG2 cell only demonstrated an infinitesimal expression of the full length CYP2C18. The expression of CYP2C18 exons 2 to 7 was also analyzed by RT-PCR in 7 extratumoral liver tissues. Among them, 3 samples expressed on

关键词： Bauhinia racemosa antineoplastic agents malondialdehyde antioxidants

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Medicinal Plant Using Ground State Stabilization of Natural Antioxidant Curcumin by Keto-Enol Tautomerisation

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Natural Products and Bioprospecting 2018年第5期8卷 369-390页

作者： S.Manimaran K.sambath kumar R.Gayathri K.Raja N.Rajkamal M.Venkatachalapathy G.Ravichandran C.Lourdu EdisonRaj P.G&Research Department of Physics Thanthai Hans Roever College(Autonomous)PerambalurTamil Nadu 621220India Post Graduate and Research Department of Physics (NANO Science Divisions)A.A.Govt.Arts CollegeVillupuramTamil Nadu 605602India Post Graduate and Research Department of Physics Cauvery College for WomenTiruchirappalliTamil NaduIndia Post Graduate and Research Department of Physics Dr.R.K.Shanmugam College of Arts&ScienceKallakurichiTamil Nadu 606213India Post Graduate and Research Department of Physics Thiru.A.Govindasamy Govt Arts CollegeTindivanamTamil Nadu 604002India Post Graduate and Research Department of Chemistry A.A.Govt.Arts CollegeVillupuramTamil Nadu 605602India

Curcumin is a medicinal agent that exhibits anti-cancer properties and bioactive pigment in Turmeric has a huge thera-peutic *** has a keto-enol moiety that gives rise to many of its chemical properties.A recent study has shown thatketo-enol tautomerisation at this moiety is implicated the effect of *** tautomerisation of curcumin in *** and acetonitrile are used in nuclear magnetic resonance(^(1)H,^(13)C)*** was characterized using UV,IRand Raman spectral *** molecular electrostatic potential surface of the Curcumin has been visualized in elec-tropositive potential in the region of the CH^(3+) group and most electronegative potential in the two oxygen atom has verystrong binding *** the following,the modality of structural and thermo dynamical parameters,electrophilicity(ω).chemical potential(μ),chemical hardness(η) and electronic charge transfer confirms the local *** rate constantof tautomerisation of curcumin shows strong temperature *** electrostatic potential and Temperature dependence of various thermodynamic properties like(C^(0)_(p,m),S^(0)_(m),and H^(0)_(m))is increase with increase in temperature formonomer and dimer of various electrical fields.

关键词： Curcumin NMR.Uv HOMO-LUMO.MEP

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