نتایج جستجو برای: hg2 ions

تعداد نتایج: 137275  

Journal: :Dalton transactions 2011
Paramjit Kaur Sandeep Kaur Kamaljit Singh Parduman Raj Sharma Tandeep Kaur

An indole based "ratiometric" and "turn-off" tris(N-methylindolyl)methane based chemosensor depicting a contrasting fluorescent behavior towards Hg(2+) and Cu(2+) ions, exhibited NOR and YES logic functions, and also imaged intracellular Hg(2+) in cervix cancer (HeLa) cells.

Journal: :Heliyon 2023

In this study, a proper and reliable fluorometric method is introduced for screening acetylcholinesterase (AChE) its inhibitors, using carbon quantum dots (CQDs) as the signal reporter. Pure, S-doped, P-doped CQDs, were synthesized their recoverable fluorescence quenching properties observed, when exposed to Hg2+, Cu2+, Fe3+ ions, respectively. The study on recovery of emission showed that afte...

Journal: :The Journal of pharmacology and experimental therapeutics 2001
V T Cannon R K Zalups D W Barfuss

The primary aim of the present study was to test the hypothesis that amino acid transport systems are involved in absorptive transport of dicysteinylmercury (cysteine-Hg-cysteine). Luminal disappearance flux [JD, fmol x min(-1) (mm tubular length)(-1)] of inorganic mercury (Hg2+), in the form of dicysteinylmercury, was measured in isolated perfused S2 segments with various amino acids or amino ...

Journal: :Zeitschrift fur Naturforschung. Section C, Biosciences 1982
P Zipper G Ribitsch J Schurz H Bünemann

The binding of Hg2+ and 3,6-bis-(acetatomercurimethyl)-dioxane (BAMD) to sonicated calf thymus DNA was studied by small-angle X-ray scattering and viscosity measurements. The scattering experiments with DNA complexed by different amounts of mercurials (for Hg2+ rb=0-0.79, for BAMD rb=0-0.86 mol of mercurial bound per mol of base pairs) established that the rod-like character of the DNA molecule...

Journal: :Journal of bacteriology 1989
G Nucifora L Chu S Silver T K Misra

The structural basis for induction of the mercury resistance operon with inorganic mercury and with the organomercurial compound phenylmercuric acetate was addressed by DNA sequencing analysis and by lac fusion transcription experiments regulated by merR in trans from broad-spectrum-resistance plasmid pDU1358 (Hg2+ and phenylmercury responding). The lac fusion results were compared with those f...

2016
Romina Brasca María C. Onaindia Héctor C. Goicoechea Arsenio Muñoz de la Peña María J. Culzoni

A method for the detection and quantitation of Hg2+ in aqueous samples by fluorescence spectroscopy is presented. It consists of a turn-on sensor developed by coupling Gold nanoparticles (AuNPs) with the rhodamine 6G derivative FC1, in which the response is generated by a mercury-induced ring-opening reaction. The AuNPs were included in order to improve the sensitivity of the method towards the...

Journal: :The Analyst 2003
Wassana Yantasee Yuehe Lin Thomas S Zemanian Glen E Fryxell

The anodic stripping voltammetry at a carbon paste electrode modified with thiol terminated self-assembled monolayer on mesoporous silica (SH-SAMMS) provides a new sensor for simultaneous detection of lead (Pb2+) and mercury (Hg2+) in aqueous solutions. The overall analysis involved a two-step procedure: an accumulation step at open circuit, followed by medium exchange to a pure electrolyte sol...

Journal: :Toxicological sciences : an official journal of the Society of Toxicology 2006
Stamatina E Ziemba Raymond R Mattingly Michael J McCabe Allen J Rosenspire

Little is known as to the molecular mechanisms involved with mercury intoxication at very low levels. Although the mechanism is not known, animal studies have nevertheless shown that low levels of mercury may target the immune system. Inorganic mercury (Hg2+) at very low (but non-toxic) levels can disrupt immune system homeostasis, in that genetically susceptible rodents develop idiosyncratic a...

Journal: :Organic & biomolecular chemistry 2009
Shubha Pandey Amir Azam Siddharth Pandey H M Chawla

Covalently-attached fluorophores may impart enhanced chemosensing capabilities to calixarene frameworks. Synthesis and characterization of six novel dansyl-appended calix[4]arenes, namely, H/Dan4, NO2/Dan4, H/(OH)2Dan2, H/(Ester)2(Dan)2, t-Bu/(OH)2Dan2, and t-Bu/(Ester)2Dan2, containing two or four dansyl moieties are reported. Among these, fluorescence intensity of NO2/Dan4 is observed to decr...

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