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Vibrational Signatures of HNO(3) Acidity When Complexed with Microhydrated Alkali Metal Ions, M(+).(HNO(3))(H(2)O)(n=5) (M = Li, K, Na, Rb, Cs), at 20 K.
Mitra S, Khuu T, Choi TH, Huchmala RM, Jordan KD, McCoy AB, Johnson MA. Mitra S, et al. J Phys Chem A. 2022 Mar 17;126(10):1640-1647. doi: 10.1021/acs.jpca.1c10352. Epub 2022 Mar 5. J Phys Chem A. 2022. PMID: 35249322
This is achieved by analyzing the vibrational spectra of the M(+).(HNO(3))(H(2)O)(5) clusters cooled to about 20 K in a cryogenic photofragmentation mass spectrometer. The local acidity of the acidic OH group is estimated by the extent of the red shift in its stretching fr …
This is achieved by analyzing the vibrational spectra of the M(+).(HNO(3))(H(2)O)(5) clusters cooled to about 20 K in a cryogenic pho …
Extreme mechanical diversity of human telomeric DNA revealed by fluorescence-force spectroscopy.
Mitra J, Makurath MA, Ngo TTM, Troitskaia A, Chemla YR, Ha T. Mitra J, et al. Proc Natl Acad Sci U S A. 2019 Apr 23;116(17):8350-8359. doi: 10.1073/pnas.1815162116. Epub 2019 Apr 3. Proc Natl Acad Sci U S A. 2019. PMID: 30944218 Free PMC article.
We used single-molecule fluorescence-force spectroscopy that combines fluorescence resonance energy transfer with optical tweezers to measure human telomeric sequences under tension. Abrupt GQ unfolding with K(+) in solution occurred at as many as four discrete levels of f …
We used single-molecule fluorescence-force spectroscopy that combines fluorescence resonance energy transfer with optical tweezers to measur …
Visual stimuli induce waves of electrical activity in turtle cortex.
Prechtl JC, Cohen LB, Pesaran B, Mitra PP, Kleinfeld D. Prechtl JC, et al. Proc Natl Acad Sci U S A. 1997 Jul 8;94(14):7621-6. doi: 10.1073/pnas.94.14.7621. Proc Natl Acad Sci U S A. 1997. PMID: 9207142 Free PMC article.
The experimental data from studies on cat [Gray, C. M., Konig, P., Engel, A. K. & Singer, W. (1989) Nature (London) 338, 334-337] support a view in which only synchronous (no phase lags) activity carries information about the visual scene. ...
The experimental data from studies on cat [Gray, C. M., Konig, P., Engel, A. K. & Singer, W. (1989) Nature (London) 338, 334-337] …
Auxiliary Therapeutic Role of Cholinergic Agents: Mechanistic Insights into the Antioxidant Behavior of Alzheimer's Disease Drugs.
Phanrang PT, Baruah P, Chandra AK, Mitra S. Phanrang PT, et al. J Phys Chem A. 2022 Feb 3;126(4):546-556. doi: 10.1021/acs.jpca.1c09146. Epub 2022 Jan 20. J Phys Chem A. 2022. PMID: 35050595
In some cases, the rate constant for the H-abstraction reaction (k = 2.8 10(3) L mol(-1) s(-1)) is found to be close to that of a well-known non-phenolic antioxidant, alpha-terpinene (k = 4.3 10(3) L mol(-1) s(-1)). ...
In some cases, the rate constant for the H-abstraction reaction (k = 2.8 10(3) L mol(-1) s(-1)) is found to be close to that of a wel …
Inhibition in binding between fullerene and a bisporphyrin in presence of silver nanoparticles in solution: UV-Vis, DLS, SEM and TEM studies.
Mitra R, Bhattacharya S. Mitra R, et al. Spectrochim Acta A Mol Biomol Spectrosc. 2013 Oct;114:11-8. doi: 10.1016/j.saa.2013.04.105. Epub 2013 May 6. Spectrochim Acta A Mol Biomol Spectrosc. 2013. PMID: 23747429
., AgNp (having diameter ~5-15 nm), in non-covalent interaction between fullerenes (C60 and C70) and a designed bisporphyrin (1) in toluene. UV-Vis measurement reveals reduction in binding constant (K) values for both C60-1 (K(C60-1)=18,800 dm(3) mol(-1)) and C70-1 …
., AgNp (having diameter ~5-15 nm), in non-covalent interaction between fullerenes (C60 and C70) and a designed bisporphyrin (1) in toluene. …
Interaction of cinnamic acid derivatives with serum albumins: a fluorescence spectroscopic study.
Singh TS, Mitra S. Singh TS, et al. Spectrochim Acta A Mol Biomol Spectrosc. 2011 Mar;78(3):942-8. doi: 10.1016/j.saa.2010.11.046. Epub 2010 Dec 22. Spectrochim Acta A Mol Biomol Spectrosc. 2011. PMID: 21247795
Stern-Volmer analysis of the tryptophan fluorescence quenching data in presence of the added ligand reveals fluorescence quenching constant (kappa(q)), Stern-Volmer constant (K(SV)) and also the ligand-protein association constant (K(a)). ...
Stern-Volmer analysis of the tryptophan fluorescence quenching data in presence of the added ligand reveals fluorescence quenching constant …
Anticancer activity and cell death mechanism of Pt(II) complexes: Their in vitro bio-transformation to Pt(II)-DNA adduct formation and BSA binding study by spectroscopic method.
Bhaduri R, Mukherjee S, Mitra I, Ghosh S, Chatterji U, Dodda SR, Moi SC. Bhaduri R, et al. Spectrochim Acta A Mol Biomol Spectrosc. 2021 Dec 5;262:120096. doi: 10.1016/j.saa.2021.120096. Epub 2021 Jun 22. Spectrochim Acta A Mol Biomol Spectrosc. 2021. PMID: 34214741
At pH 4.0, C-2 - thiols interactions follow two consecutive steps: the first step is dependent, and the second is independent of [thiol]. The association equilibrium constant (K(E)), substitution rate constants for both steps (k(1) & k(2)), and activation …
At pH 4.0, C-2 - thiols interactions follow two consecutive steps: the first step is dependent, and the second is independent of [thiol]. Th …
Two types of calcium channels in guinea pig ventricular myocytes.
Mitra R, Morad M. Mitra R, et al. Proc Natl Acad Sci U S A. 1986 Jul;83(14):5340-4. doi: 10.1073/pnas.83.14.5340. Proc Natl Acad Sci U S A. 1986. PMID: 2425366 Free PMC article.
In a few cells, the current through both channels was enhanced by isoproterenol, a beta-adrenergic agonist, but only the high-threshold channel was enhanced by the Ca2+-channel agonist Bay K 8644. Thus, isolated guinea pig ventricular myocytes appear to have two types of C …
In a few cells, the current through both channels was enhanced by isoproterenol, a beta-adrenergic agonist, but only the high-threshold chan …
Studies on sorption kinetics and sorption isotherm for pervaporative separation of benzene from model pyrolysis gasoline using insitu nano silver/polyvinyl alcohol membrane.
Samanta M, Roychowdhury S, Mitra D. Samanta M, et al. J Environ Sci Health A Tox Hazard Subst Environ Eng. 2021;56(13):1397-1408. doi: 10.1080/10934529.2021.2002094. Epub 2021 Dec 1. J Environ Sci Health A Tox Hazard Subst Environ Eng. 2021. PMID: 34852721
The highest pervaporation separation index achieved for the selected system was 14.259 kg/m(2)/h at 303 K, with 30 volume% benzene in model Py gas using a downstream pressure of 1 mm of Hg. ...
The highest pervaporation separation index achieved for the selected system was 14.259 kg/m(2)/h at 303 K, with 30 volume% benzene in …
Study of non-covalent interaction between a designed monoporphyrin and fullerenes (C60 and C70) in absence and presence of silver nanoparticles.
Mitra R, Bauri AK, Bhattacharya S. Mitra R, et al. Spectrochim Acta A Mol Biomol Spectrosc. 2012 Oct;96:485-92. doi: 10.1016/j.saa.2012.05.040. Epub 2012 May 24. Spectrochim Acta A Mol Biomol Spectrosc. 2012. PMID: 22728285
While UV-Vis studies establish the ground state electronic interaction between fullerenes and 1 in absence and presence of AgNp, steady state fluorescence experiment enables us to determine the value of binding constant (K) for the fullerene-1 complexes in solution. Steady …
While UV-Vis studies establish the ground state electronic interaction between fullerenes and 1 in absence and presence of AgNp, steady stat …
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