The reactions of the chemical warfare agents (CWAs) 2,2'-dichloroethyl sulfide (HD), O-ethyl S-2-(diisopropylamino)-ethyl methylphosphonothioate (VX) and isopropyl methylphosphonofluoridate (GB) with various metal oxide-supported quaternary ammonium fluorides (QAF) and/or potassium fluoride (KF) reagents are described. These active sorbents, which were prepared by a modified procedure, include ...

A series of novel ferrocenyl- and aryl-phosphonofluorodithioic salts, adducts, and esters has been prepared. The reaction of 2,4-diferrocenyl-1,3,2,4-diathiadiphosphetane 2,4-disulfide {[FcP(μ-S)S]2, FcLR} with dry KF or tetrabutylammonium fluoride (TBAF) led to the corresponding potassium and tetrabutylammonium salts of ferrocenyldithiofluorophosphinic acids. Treating potassium ferrocenyldithi...

Objective: This clinical trial was conducted to compare the efficacy of fluoride varnish containing xylitol coated calcium and phosphate or potassium nitrate gel versus conventional in management hypersensitivity non-carious exposed root surfaces adult patients. Material Methods: 35 patients having 105 hypersensitive teeth were randomly allocated be treated either using Embrace (PULPDENT Corpor...

Dentin hypersensitivity or sensitive teeth is one of the most disturbing diseases caused by opening dentinal tubules which can transmit fluid to pulp nerves tooth, so that patient feel a short and sharp pain when exposed triggering agents. This cause physical psychological problems for patient. In addition, it have negative impact on person's quality life, especially regarding food selection, p...

For forty years researchers on ferroelectric switching have used the Kay-Dunn theory to model the thickness-dependence of the coercive field; it works surprisingly well, despite the fact that it is based upon homogeneous nucle-ation and a small-field expansion, neither of which is realized in thin films. Here we demonstrate that this result can be obtained from a more general Kolmogorov-Avrami ...

The title compound, C(20)H(33)ClN(2)O(3), was obtained via a tandem asymmetric Michael addition-elimination reaction of 3,4-dichloro-5-(S)-(l-menth-yloxy)furan-2(5H)-one and 1-ethyl-piperazine in the presence of potassium fluoride. The mol-ecular structure contains an approximately planar five-membered furan-one ring [maximum atomic deviation = 0.024 (2) Å] and two six-membered rings adopting c...

The potassium-selective glass membranes like KAS,,_, and NAS,,_, are approx. IO times more sensitive to K+ than to Na +lp3. Since the concentration ratio of Na+/K+ in blood serum is around 35-40 and since there is at best a K+ over Naf selectivity in glass electrodes of IO, a separate measurement of the Na+ concentration is needed to correct the reading of the K+ sensor 4. Because of the depend...

A spike that is the result of calcium permeability through potassium channels was separated from the action potential is squid giant axons internally perfused with a 30 mM NaF solution and bathed in a 100 mM CaCl2 solution by blocking sodium channels with tetrodotoxin. Currents through potassium channels were studied under voltage clamp. The records showed a clear voltage-dependent inactivation...

The aim of this randomized, controlled, split-mouth, clinical study was to differentiate and clinically qualify the effectiveness of different desensitizing agents in the treatment of painful symptoms caused by cervical dentin hypersensitivity (CDH). Two hundred-and-fifty-two teeth of 42 patients were distributed into seven groups (n = 36): G1 - placebo; G2, G3, G4 and G6 - fluoride varnishes; ...