Tetraethylammonium
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Structure-Directing Behaviors of Tetraethylammonium Cations toward Zeolite Beta Revealed by the Evolution of Aluminosilicate Species Formed during the Crystallization Process Open
Organic structure-directing agents (OSDAs) have been widely used for the synthesis of zeolites. In most cases, OSDAs are occluded in zeolites as an isolated cation or molecule geometrically fitted within the zeolite cavities. This is not t…
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Ionic Selectivity and Permeation Properties of Human PIEZO1 Channels Open
Members of the eukaryotic PIEZO family (the human orthologs are noted hPIEZO1 and hPIEZO2) form cation-selective mechanically-gated channels. We characterized the selectivity of human PIEZO1 (hPIEZO1) for alkali ions: K+, Na+, Cs+ and Li+;…
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High yield synthesis of high-silica chabazite by combining the role of zeolite precursors and tetraethylammonium: SCR of NOx Open
The synthesis of chabazite with high solid yields is achieved by the rational combination of directing effects of a source of Si and Al coming from USY zeolites and the inexpensive tetraethylammonium.
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Template–Framework Interactions in Tetraethylammonium‐Directed Zeolite Synthesis Open
Zeolites, having widespread applications in chemical industries, are often synthesized using organic templates. These can be cost‐prohibitive, motivating investigations into their role in promoting crystallization. Herein, the relationship…
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Incorporation of Mn into the vacant T-atom sites of a BEA zeolite as isolated, mononuclear Mn: FTIR, XPS, EPR and DR UV-Vis studies Open
A MnSiBEA zeolite has been prepared via a two-step postsynthesis procedure which consisted, in the first step, of the treatment of a tetraethylammonium BEA zeolite with nitric acid for the formation of vacant T-atom sites and then, in the …
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Fe‐Containing Zeolites for NH<sub>3</sub>‐SCR of NO<sub><i>x</i></sub>: Effect of Structure, Synthesis Procedure, and Chemical Composition on Catalytic Performance and Stability Open
The direct preparation of different iron‐containing Beta and CHA zeolites has been attempted under diverse synthesis conditions, including in alkaline and fluoride media, to evaluate the influence of their physicochemical properties on the…
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Rational design of MXene/activated carbon/polyoxometalate triple hybrid electrodes with enhanced capacitance for organic-electrolyte supercapacitors Open
17 pages. -- File includes supplementary data: Synthesis of MXene/AC; In-situ growth MXene/TEAPW12
\nDelamination of MXene with TEAOH; Synthesis of MXene/TEAPW12; Preparation of activated carbon electrode for asymmetric capacitors; Charge …
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Carbon nanoparticles enhance potassium uptake via upregulating potassium channel expression and imitating biological ion channels in BY-2 cells Open
Background Carbon nanoparticles (CNPs) have been reported to boost plant growth, while the mechanism that CNPs enhanced potassium uptake for plant growth has not been reported so far. Results In this study, the function that CNPs promoted …
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Vasorelaxant properties of <i>Vernonia amygdalina</i> ethanol extract and its possible mechanism Open
The vasorelaxation effect of VAE involves upregulation of NO/cGMP and PGI2 signalling pathways, and modulation of calcium/potassium channels, and muscarinic and β2-adrenergic receptor levels.
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Synthesis of SAPO-34 Using Different Combinations of Organic Structure-Directing Agents Open
The effects of different mixtures of organic structure-directing agents (OSDAs) on the formation of SAPO-34 structure have been investigated. Different OSDAs, namely, triethylamine (TEA), tetraethylammonium hydroxide (TEAOH), and morpholin…
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TRPM2 Oxidation Activates Two Distinct Potassium Channels in Melanoma Cells through Intracellular Calcium Increase Open
Tumor microenvironments are often characterized by an increase in oxidative stress levels. We studied the response to oxidative stimulation in human primary (IGR39) or metastatic (IGR37) cell lines obtained from the same patient, performin…
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Endothelial-derived hyperpolarization contributes to acetylcholine-mediated vasodilation in human skin in a dose-dependent manner Open
Cutaneous acetylcholine (ACh)-mediated dilation is commonly used to assess microvascular function, but the mechanisms of dilation are poorly understood. Depending on dose and method of administration, nitric oxide (NO) and prostanoids are …
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K<sup>+</sup> channel mechanisms underlying cholinergic cutaneous vasodilation and sweating in young humans: roles of K<sub>Ca</sub>, K<sub>ATP</sub>, and K<sub>V</sub> channels? Open
Acetylcholine released from cholinergic nerves is involved in heat loss responses of cutaneous vasodilation and sweating. K + channels are thought to play a role in regulating cholinergic cutaneous vasodilation and sweating, though which K…
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Memristors: Memory elements in potato tubers Open
A memristor is a nonlinear element because its current-voltage characteristic is similar to that of a Lissajous pattern for nonlinear systems. This element was postulated recently and researchers are looking for it in different biosystems.…
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Resveratrol attenuates cortical neuron activity: roles of large conductance calcium-activated potassium channels and voltage-gated sodium channels Open
As BKCa channels and sodium channels are critical molecular determinants for seizure generation, our findings suggest that regulation of these two channels in cortical neurons probably makes a considerable contribution to the antiseizure a…
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Potassium Efflux and Cytosol Acidification as Primary Anoxia-Induced Events in Wheat and Rice Seedlings Open
Both ion fluxes and changes of cytosolic pH take an active part in the signal transduction of different environmental stimuli. Here we studied the anoxia-induced alteration of cytosolic K+ concentration, [K+]cyt, and cytosolic pH, pHcyt, i…
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Characterization of ion channels and O<sub>2</sub>sensitivity in gill neuroepithelial cells of the anoxia-tolerant goldfish (<i>Carassius auratus</i>) Open
The neuroepithelial cell (NEC) of the fish gill is an important model for O 2 sensing in vertebrates; however, a complete picture of the chemosensory mechanisms in NECs is lacking, and O 2 chemoreception in vertebrates that are tolerant to…
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Relaxation Effect of Patchouli Alcohol in Rat Corpus Cavernous and Its Underlying Mechanisms Open
In this study, we investigated the relaxation effect and mechanisms of patchouli alcohol (PA) on rat corpus cavernosum. Corpus cavernosum strips were used in organ baths for isometric tension studies. The results showed that PA demonstrate…
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Analysis of erectile responses to H<sub>2</sub>S donors in the anesthetized rat Open
Hydrogen sulfide (H 2 S) is a biologically active endogenous gasotransmitter formed in penile tissue that has been shown to relax isolated cavernosal smooth muscle. In the present study, erectile responses to the H 2 S donors sodium sulfid…
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Rapid volume pulsation of the extracellular space coincides with epileptiform activity in mice and depends on the NBCe1 transporter Open
Key points Extracellular space (ECS) rapid volume pulsation (RVP) accompanying epileptiform activity is described for the first time. Such RVP occurs robustly in several in vitro and in vivo mouse models of epileptiform activity. In the in…
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Protective desilication of highly siliceous H-ZSM-5 by sole tetraethylammonium hydroxide for the methanol to propylene (MTP) reaction Open
Protective desilication of highly siliceous H-ZSM-5 was effectively realized by dissolution and recrystallization in tetraethylammonium hydroxide (TEAOH) solution.
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Pu-Erh Tea Relaxes the Thoracic Aorta of Rats by Reducing Intracellular Calcium Open
Previous studies suggested that pu-erh tea aqueous extract could lower blood pressure and ameliorate hypertension symptoms. However, the antihypertension mechanisms of pu-erh tea remain unclear. In this work, the direct effects of pu-erh t…
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Assay Conditions Influence Affinities of Rat Organic Cation Transporter 1: Analysis of Mutagenesis in the Modeled Outward-Facing Cleft by Measuring Effects of Substrates and Inhibitors on Initial Uptake Open
The effects of mutations in the modeled outward-open cleft of rat organic cation transporter 1 (rOCT1) on affinities of substrates and inhibitors were investigated. Human embryonic kidney 293 cells were stably transfected with rOCT1 or rOC…
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Dopamine maintains network synchrony via direct modulation of gap junctions in the crustacean cardiac ganglion Open
The Large Cell (LC) motor neurons of the crab cardiac ganglion have variable membrane conductance magnitudes even within the same individual, yet produce identical synchronized activity in the intact network. In a previous study we blocked…
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Cell swelling increases the severity of spreading depression in<i>Locusta migratoria</i> Open
Progressive accumulation of extracellular potassium ions can trigger propagating waves of spreading depression (SD), which are associated with dramatic increases in extracellular potassium levels ([K + ] o ) and arrest in neural activity. …
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Mechanism of use-dependent Kv2 channel inhibition by RY785 Open
Understanding the mechanism by which ion channel modulators act is critical for interpretation of their physiological effects and can provide insight into mechanisms of ion channel gating. The small molecule RY785 is a potent and selective…
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Endothelium-dependent and endothelium-independent vasorelaxant effects of tiliacorinine 12′-O-acetate and mechanisms on isolated rat aorta Open
Tiliacorinine 12'-O-acetate is a modified analog of Tiliacorinine, a major compound in Tiliacora triandra. The present study explored the vasorelaxation property of tiliacorinine 12'-O-acetate and its mechanism in isolated rat aorta using …
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Organocatalytic clean synthesis of densely functionalized 4<i>H</i>-pyrans by bifunctional tetraethylammonium 2-(carbamoyl)benzoate using ball milling technique under mild conditions Open
A green and simple method has been developed for efficient preparation of diverse annulated 2-amino-3-cyano-4H-pyran derivatives in the presence of a low loading of tetraethylammonium 2-(carbamoyl)benzoate (TEACB), as a bifunctional organo…
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Voltage-gated Ca<sup>2+</sup>channel activity modulates smooth muscle cell calcium waves in hamster cremaster arterioles Open
Cremaster muscle arteriolar smooth muscle cells (SMCs) display inositol 1,4,5-trisphosphate receptor-dependent Ca 2+ waves that contribute to global myoplasmic Ca 2+ concentration and myogenic tone. However, the contribution made by voltag…
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Elucidating the Role of Tetraethylammonium in the Silicate Condensation Reaction from <i>Ab Initio</i> Molecular Dynamics Simulations Open
The understanding of the formation of silicate oligomers in the initial stage of zeolite synthesis is important. The use of organic structure-directing agents (OSDAs) is known to be a key factor in the formation of different silicate speci…