The technique of specular neutron reflection has been used to study the structure and composition of single and mixed surfactant layers adsorbed from aqueous solution onto self-assembled monolayers of octadecyl trichlorosilane on silicon oxide. The surfactants used were the anionic sodiumn-dodec...
Voltage-gated sodium channels participate in the propagation of action potentials in excitable cells. Eukaryotic Navs are pseudo homotetrameric polypeptides, comprising four repeats of six transmembrane segments (S1–S6). The first four segments form the voltage-sensing domain and S5 and S6 crea...
Endosulfan – an agricultural insecticide and banned by Stockholm Convention – is produced as a 2:1 to 7:3 mixture of isomers endosulfan I (ESI) and endosulfan II (ESII). Endosulfan is transformed under aerobic conditions into endosulfan sulfate (ESS). The study shows for 76 sampling locations ...
SummarySodium sulfates 11–14, 29–32, 35 and 37 of various alkyl glycyrrhizin and related compounds were synthesized. In vitro anti-HIV activities of the sulfates were compared to the activities of glycyrrhizin 1 in the inhibition of replications of HTLV-III and GUN-4. The activities of the sul...
Nanoparticles of a poorly water-soluble drug, probucol, have been obtained by co-grinding with PVP and SDS. The purpose of this study was to investigate the effect of the alkyl chain length of sodium alkyl sulfates (CnS, n = 6, 8, 12, 16 and 18) on probucol nanoparticle formation. From the resul...
The paper describes the indirect determination of sulfates by in-electrode coulometric indication method. The principle of the determination of sulfates consists in the on-line coupling of the exchange column filled with barium chromate and the flow-through coulometric analyser. In the column Ba...
An environmentally friendly approach was reported for recovering vanadium (V) from aqueous media with aqueous two-phase system (ATPS) formed by poly (ethylene glycol) 2000 (PEG2000) and sodium sulfate with octadecyl amine ethoxylate ethers as extractants. The effect of aqueous pH, the type of ex...
IntroductionThe use of chelating agents in endodontic treatment is required to remove the smear layer and to achieve better disinfection within the root canal system. The aim of this study was to evaluate the residual antimicrobial activity of 17% ethylenediaminetetraacetic acid (EDTA), 7% malei...
IntroductionThe use of root canal filling materials with antibacterial activity can be considered beneficial to reduce the remaining microorganisms in the root canal system, where Enterococcus faecalis is often found, and prevent recurrent infection. The aim of this study was to evaluate the ant...
IntroductionChelating agents, such as EDTA or citric acid, can be incorporated into irrigants in order to provide different properties in a single compound. Maleic acid has recently been proposed as an alternative irrigant to EDTA given its better smear layer removal and biocompatibility; howeve...
IntroductionTo reach an adequate control of dentin infection and to promote success in endodontic therapy, antimicrobial irrigating solutions with confirmed substantivity are recommended. The aim of the present study was to evaluate the antimicrobial substantivity against Enterococcus faecalis o...
Macromolecules of various surfactants and polymers are being used to prepare nano hydroxyapatites (HAp) of varied morphology. Here we report the successful preparation of shell-like nano HAp spheres with fine morphology, uniform size around 200 nm, and stoichiometry ratio 1.7 with 56% nano- (
IntroductionThe use of root canal filling materials with antibacterial activity could be considered beneficial to reduce any remaining microorganisms and prevent recurrent infection. The aim of this study was to evaluate the physical properties of AH Plus (Dentsply DeTrey, Konstanz, Germany) alo...
A mechanism showing different modes of interaction of benzalkonium chloride and cetrimide with the stationary and mobile phase has been proposed which leads to the separation of this surfactant mixture. Other combination of cationic surfactants was also separated from their binary mixture by the...
IntroductionEnterococcus faecalis is the most commonly isolated bacteria from root canals of teeth with persistent periapical periodontitis. Its ability to grow as a biofilm impedes the elimination of E. faecalis by using irrigating solutions. The purpose of this study was to assess the efficacy...
Cetrimide was proven to be an effective selective extractant for uranium from phosphoric acid solutions of comparable concentration to the wet process phosphoric acid (WPPA). Several experiments have thus been performed to determine the relevant factors of both uranium extraction and stripping u...
It is the first time to use calcination methods to remove the residual surfactant Cetyl Trimethyl Ammonium Bromide (CTAB) acting as soft template or structure directing agent for supercapacitor MnO2 electrodes. MnO2 was synthesized by liquid co-precipitation in the presence of CTAB. The as-prepa...
To determine the appropriate operating conditions for separating carbon dioxide from flue gas via the hydrate formation, the effects of the concentrations of dodecyl trimethyl ammonium chloride (DTAC) in 0.29 mol% Tetra-n-butyl ammonium bromide (TBAB) aqueous solution and the initial pressures o...
Butane-1,4-bis(dodecyl dimethyl ammonium bromide) (gBDDA) and dodecyl trimethyl ammonium bromide (DTMA) in same stoichiometric amounts were applied to modify montmorillonite (Mt) under microwave and ultrasound conditions. The composition and structure of products were obtained through multiple c...
The denaturation of glucose oxidase has been studied as a function of dodecyl trimethyl ammonium bromide (DTAB) concentration at temperatures between 25 and 65°C, with 2.5 mM phosphate buffer and pH 6.4. DTAB was found to be very effective in denaturing glucose oxidase, normally resistent to ot...
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