http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Synthesis, cytotoxicity and bioimaging of a novel Hg2+ selective fluorogenic chemosensor
Saleem, M.,Abdullah, R.,Ali, A.,Park, B.,Choi, E.,Hong, I.,Lee, K. Royal Society of Chemistry 2014 Analytical methods Vol.6 No.11
A rhodamine B derivative 2 with a terminal mercapto thiadiazole moiety was successfully synthesized and applied for selective recognition of Hg2+ in aqueous-acetonitrile (1:1, v/v, pH 7) solution by employing its photophysical properties. Low toxicity and precise cell-permeability of the ligand were used to probe in vitro intracellular mercury contamination using L-929 cells (mouse fibroblast cells) and BHK-21 (hamster kidney fibroblast) through a confocal fluorescence microscopic experiment and bio-imaging results showed the equal applicability of the ligand toward both tested cell tines. Meanwhile, it exhibited distinct Hg2+ induced increment in the fluorescence and absorption intensities with induction of an apparent colorimetric change from colorless to reddish pink, providing naked eye mercury detection based on the metal-promoted intramolecular electronic rearrangement in the probe molecule. The probe responds selectively to Hg2+ over various competitive cations (Sc3+, Yb3+, In3+, Ce3+, Sm3+, Cr3+, Sn2+, Pb2+, Fe2+, Ni2+, Co2+, Cu2+, Ba2+, Ca2+, Mg2+, Ag+, Cs+, Cu+, and K+) with marked fluorogenic response and selective colorimetric changes with high sensitivity of 30 nM. We expect that the proposed method will serve as a practical tool for environmental sample analysis and biological studies.
Chromo/Fluorogenic Detection of Co2+, Hg2+ and Cu2+ by the Simple Schiff Base Sensor
Saleem, M.,Khang, C. H.,kim, M. H.,Lee, K. H. Springer Science + Business Media 2016 Journal of fluorescence Vol.26 No.1
<P>Herein, we reported the ditriazole Schiff base derivative 1 and evaluated its photophysical properties on induction of varieties of metal ions including Na+, Ag+, Ni2+, Mn2+, Pd2+, Co2+, Hg2+, Cu2+, Pb2+, Cd2+, Zn2+, Sn2+, Fe2+, Fe3+, Cr3+ and Al3+, in order to figure out its potential as ion sensor. The ligand 1 exhibited the strong colorimetric change in the reaction solution as well as absorption spectral shifting with the concomitant appearance of well-defined isosbestic points only upon Co2+, Hg2+ and Cu2+ addition corroborates its applicability as multichannel ion detector. The different extent of spectral shifting as well as unique chromogenic change in the probe solution upon Co2+, Hg2+ and Cu2+ introduction can be used as the discrimination tool for these metal ions. The ligand-metal binding stoichiometry was assessed by their optical response which was further supported by the FT-IR, NMR and mass spectrometric analysis. The association constant and the detection limits of the ligand toward Co2+, Hg2+ and Cu2+ ions were calculated to be 1.52 x 10(-8), 3.26 x 10(-9), 1.16 x 10(-8) and 3.87 x 10(-10), 5.47 x 10(-11), 8.91 x 10(-11) M, respectively, employing the Benesi-Hilderbrand equation and 3 sigma slope(-1) methods. Furthermore, the successive addition of Co2+, Hg2+ and Cu2+ induce the constant decline in the fluorescence emission signal intensity of the probe. The quenching efficiency of the probe upon metallic induction was fitted to the Stern-Volmer equation which yielded the upward curvature in case of all the three metals ions (Co2+, Hg2+ and Cu2+) when (I-o/I-1) was plotted against the quencher concentration indicating the occurrence of both the dynamic and static quenching process in the system with the average Stern-Volmer quenching constant values of 9.25 x 10(-7), 1.14 x 10(-7), 1.829 x 10(-7), respectively.</P>
K. Lavanya,M. A. Saleem Durai,N. Ch. S. N. Iyengar 보안공학연구지원센터 2015 International Journal of Multimedia and Ubiquitous Vol.10 No.6
In decision making, crisp ranking is not possible when the entire attribute characteristics and their degree of importance are known precisely. In real world situations decision making takes place in an environment where the goals, the constraints, and the consequences of possible actions are not known precisely. Thus the best condition for classic decision making problem may not be satisfied when the situation involves both fuzzy and crisp data. Site specific soil fertility and seasonal crop selection data are characterized by high degree of fuzziness and uncertainty. In our model, intuitionistic fuzzy rough set establishes a close connection between the concepts of similarity and dissimilarity thereby providing an excellent framework for ranking soil fertility. Further fuzzy Bayesian incorporates both fuzzy and uncertainty in the probability model yielding more realistic seasonal paddy variety selection. The decision model introduced in this paper is suitable for both data rich and data poor environment. The results illustrate that the soil fertility ranking and successive paddy variety selection can help to sustain the soil fertility in subsequent rotations and minimize the loss of nutrients from the sites.