نتایج جستجو برای: al3

تعداد نتایج: 1330  

Journal: :The Biochemical journal 1990
C Schöfl A Sanchez-Bueno C J Dixon N M Woods J A Lee K S Cuthbertson P H Cobbold J D Birchall

Aluminium is known to be toxic to cells from bone, brain and bone marrow but the molecular target(s) affected by Al3+ are not known. We show here that Al3+ disrupts the oscillatory free Ca2+ responses of hepatocytes exposed to the Ca2(+)-mobilizing agonist phenylephrine. Al3+ initially increases the frequency of the oscillations and later induces broad Ca2+ spikes lasting several minutes. These...

Journal: :Clinical chemistry 1986
R B Martin

The increasing number of roles discovered for Al3+ in physiological processes demands an understanding of how Al3+ interacts with compounds in biological systems. Al3+ is expected to complex with oxygen donor ligands, especially phosphates, and it does so in soils, in the gastrointestinal tract, and in cells. The stability of Al3+ complexes has generally been misjudged because of lack of recogn...

Journal: :Virology 2001
S B Settlage A B Miller W Gruissem L Hanley-Bowdoin

Geminiviruses replicate their small, single-stranded DNA genomes through double-stranded DNA intermediates in plant nuclei using host replication machinery. Like most dicot-infecting geminiviruses, tomato golden mosaic virus encodes a protein, AL3 or C3, that greatly enhances viral DNA accumulation through an unknown mechanism. Earlier studies showed that AL3 forms oligomers and interacts with ...

Journal: :Brain research 1993
D Büsselberg B Platt H L Haas D O Carpenter

The effects of the trivalent cation aluminum (Al3+) on voltage activated calcium channel currents were examined. Al3+ blocks sustained and transient components of voltage activated calcium channel currents of cultured rat dorsal root ganglion (DRG) cells. Currents were elicited by voltage jumps from -80 to 0 mV. The channel block was use dependent. Steady state blockade occurred after 1 to 5 mi...

Journal: :Environmental Health Perspectives 1986
P O Ganrot

Literature regarding the biochemistry of aluminum and eight similar ions is reviewed. Close and hitherto unknown similarities were found. A hypothetical model is presented for the metabolism, based on documented direct observations of Al3+ and analogies from other ions. Main characteristics are low intestinal absorption, rapid urinary excretion, and slow tissue uptake, mostly in skeleton and re...

2005
V. Sakalauskas

To study the mechanism of aluminium toxicity in plant cells, the effects of aluminium on the electrogenesis of plasma membrane were investigated. We analyzed Al3+ induced membrane potential (Em) changes and potential changes during generation of the action potential (AP) in the internodal cells of Nitellopsis obtusa. Al3+ modified Em decrease significantly. Al3+ didn’t attenuate the amplitude o...

2014
Daniel Rettenwander Peter Blaha Robert Laskowski Karlheinz Schwarz Patrick Bottke Martin Wilkening Charles A. Geiger Georg Amthauer

We investigate theoretically the site occupancy of Al3+ in the fast-ion-conducting cubic-garnet Li7-3x Al3+x La3Zr2O12 (Ia-3d) using density functional theory. By comparing calculated and measured 27Al NMR chemical shifts an analysis shows that Al3+ prefers the tetrahedrally coordinated 24d site and a distorted 4-fold coordinated 96h site. The site energies for Al3+ ions, which are slightly dis...

Journal: :The Analyst 2013
Chang-Hung Chen De-Jhong Liao Chin-Feng Wan An-Tai Wu

A simple Schiff-base receptor 2 was prepared. It exhibits an “off-on-type” mode with high sensitivity in the presence of Al3+. The receptor 2 exhibited a high association constant with submicromolar detection for Al3+ in EtOH–H2O (95:5 v/v) solution. The addition of EDTA quenches the fluorescence of the receptor 2·Al3+ complex offering receptor 2 as a reversible chemosensor.

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Phytochelate is a charged compound that is bonded to the elements. For this purpose, in 2012, in the greenhouse of the University of Bu Ali Sina, The  effects of Si2+ and Al3+on total Phytochelate,  Phytochelate bond with  Si2+ and Al3+and distribution of Si2+ and  Al3+ ions in two rice cultivars (Shirudi and Aus) with different resistance to salinity. In this study, 30-day-old seedlings of ric...

2017
Surendra Shinde Dae-Young Kim Rijuta Ganesh Saratale Asad Syed Fuad Ameen Gajanan Ghodake

A simple green route has been developed for the synthesis of casein peptide functionalized gold nanoparticles (AuNPs), in which casein peptide acts as a reducing as well as the stabilizing agent. In this report, AuNPs have been characterized on the basis of spectroscopic and microscopic results; which showed selective and sensitive response toward Al3+ in aqueous media, and Al3+ induces aggrega...

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