The Experts below are selected from a list of 3783 Experts worldwide ranked by ideXlab platform
Zuliang Chen - One of the best experts on this subject based on the ideXlab platform.
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adsorption of methylene blue and orange ii onto unmodified and surfactant modified zeolite
Journal of Colloid and Interface Science, 2008Co-Authors: Xiaoying Jin, Mingqin Jiang, Xaioquan Shan, Zhiguo Pei, Zuliang ChenAbstract:Adsorption of cationic methylene blue and anionic orange II onto unmodified and surfactant-modified zeolites was studied using a batch equilibration method. The effects of equilibrium time, solution pH, and sorption temperature were examined. The results suggested that 2% sodium dodecyl benzenesulfonate (SDBS)- and 3% sodium dodecyl sulfate (SDS)-modified zeolites had higher adsorption capacities for methylene blue than the unmodified zeolite, while 2% Cetylpyridinium bromide hexadecyl (CPB)- and 2% hexadecylammonium bromide (HDTMA)-modified zeolites were the best adsorbents for orange II. The adsorption conditions were optimized, and the mechanisms of adsorption are briefly discussed.
Bart Van Meerbeek - One of the best experts on this subject based on the ideXlab platform.
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rechargeable anti microbial adhesive formulation containing Cetylpyridinium chloride montmorillonite
Acta Biomaterialia, 2019Co-Authors: Kenya Matsuo, Kumiko Yoshihara, Noriyuki Nagaoka, Yoji Makita, Hideki Obika, Takumi Okihara, Akihiro Matsukawa, Yasuhiro Yoshida, Bart Van MeerbeekAbstract:Abstract Long-term anti-bacterial effect is a desired ability of any dental material in combating tooth caries as one of the most common and widespread persistent diseases today. Among several cationic quaternary ammonium compounds with antiseptic properties, Cetylpyridinium chloride (CPC) is often used in mouthrinses and toothpastes. In this study, we incorporated CPC in a soft phyllosilicate mineral (clay), referred to as montmorillonite (Mont), to enable gradual CPC release with rechargeability. Besides measuring CPC release and recharge, we examined the anti-bacterial effect, cytotoxicity and bonding effectiveness of five experimental adhesive formulations, prepared by adding 1 and 3 wt% CPC_Mont, 3 wt% Mont (without CPC), and 1 and 3 wt% CPC (without Mont) to the commercial adhesive Clearfil S3 Bond ND Quick (‘C-S3B’; Kuraray Noritake). Strong inhibition of Streptococcus mutans biofilm formation by CPC_Mont adhesives was confirmed by optical density and SEM. CPC release from CPC_Mont adhesives was higher and lasted longer than from CPC adhesives, while CPC_Mont adhesives could also be recharged with CPC upon immersion in 2 wt% CPC. In conclusion, CPC_Mont technology rendered adhesives anti-bacterial properties with recharge ability, this without reducing its bonding potential, neither increasing its cytotoxicity. Statement of significance Dental caries is one of the most prevalent chronic diseases in the population worldwide and is the major cause of tooth loss. In this study, we developed Cetylpyridinium chloride (CPC) loaded montmorillonite (CPC-Mont) with a long-term antibacterial efficacy to prevent caries. CPC is an antibacterial agent approved by FDA, used as an OTC drug and contained in oral hygiene aids. CPC-Mont was incorporated in a dental adhesive to gradually release CPC. CPC_Mont technology rendered adhesives anti-bacterial properties with rechargeability, this without reducing its bonding potential, neither increasing its cytotoxicity.
Kumiko Yoshihara - One of the best experts on this subject based on the ideXlab platform.
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rechargeable anti microbial adhesive formulation containing Cetylpyridinium chloride montmorillonite
Acta Biomaterialia, 2019Co-Authors: Kenya Matsuo, Kumiko Yoshihara, Noriyuki Nagaoka, Yoji Makita, Hideki Obika, Takumi Okihara, Akihiro Matsukawa, Yasuhiro Yoshida, Bart Van MeerbeekAbstract:Abstract Long-term anti-bacterial effect is a desired ability of any dental material in combating tooth caries as one of the most common and widespread persistent diseases today. Among several cationic quaternary ammonium compounds with antiseptic properties, Cetylpyridinium chloride (CPC) is often used in mouthrinses and toothpastes. In this study, we incorporated CPC in a soft phyllosilicate mineral (clay), referred to as montmorillonite (Mont), to enable gradual CPC release with rechargeability. Besides measuring CPC release and recharge, we examined the anti-bacterial effect, cytotoxicity and bonding effectiveness of five experimental adhesive formulations, prepared by adding 1 and 3 wt% CPC_Mont, 3 wt% Mont (without CPC), and 1 and 3 wt% CPC (without Mont) to the commercial adhesive Clearfil S3 Bond ND Quick (‘C-S3B’; Kuraray Noritake). Strong inhibition of Streptococcus mutans biofilm formation by CPC_Mont adhesives was confirmed by optical density and SEM. CPC release from CPC_Mont adhesives was higher and lasted longer than from CPC adhesives, while CPC_Mont adhesives could also be recharged with CPC upon immersion in 2 wt% CPC. In conclusion, CPC_Mont technology rendered adhesives anti-bacterial properties with recharge ability, this without reducing its bonding potential, neither increasing its cytotoxicity. Statement of significance Dental caries is one of the most prevalent chronic diseases in the population worldwide and is the major cause of tooth loss. In this study, we developed Cetylpyridinium chloride (CPC) loaded montmorillonite (CPC-Mont) with a long-term antibacterial efficacy to prevent caries. CPC is an antibacterial agent approved by FDA, used as an OTC drug and contained in oral hygiene aids. CPC-Mont was incorporated in a dental adhesive to gradually release CPC. CPC_Mont technology rendered adhesives anti-bacterial properties with rechargeability, this without reducing its bonding potential, neither increasing its cytotoxicity.
Bidyut Saha - One of the best experts on this subject based on the ideXlab platform.
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combination of best promoter and micellar catalyst for chromic acid oxidation of d arabinose in aqueous media at room temperature
Tenside Surfactants Detergents, 2015Co-Authors: Suzanna Malik, Bidyut SahaAbstract:Abstract The present paper describes the kinetics and mechanism for oxidation of D-arabinose by Cr(VI) in the presence of a micellar media. The anionic surfactant sodium dodecyl sulphate (SDS) and nonionic surfactant Triton-X-100 (TX-100) accelerate the process while the cationic surfactant N-Cetylpyridinium chloride (CPC) retards the reaction. A suitable mechanism has been proposed. The reaction constants involved in different steps of the mechanism have been calculated. Formic acid and erythronic acid were reported as the products of oxidation of the sugar.
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combination of best promoter and micellar catalyst for cr vi oxidation of lactose to lactobionic acid in aqueous medium at room temperature
Tenside Surfactants Detergents, 2014Co-Authors: Susanta Malik, Kakali Mukherjee, Aniruddha Ghosh, Bidyut SahaAbstract:Abstract In aqueous acidic media, picolinic acid, 2,3-dipicolinic acid, and 2,6-dipicolinic acid promoted Cr(VI) oxidation of lactose to lactobionic acid has been carried out at room temperature. A possible reaction mechanism, which is based on the kinetic results and the product analysis, has been proposed. The anionic surfactant sodium dodecyl sulphate (SDS) and nonionic surfactant Triton-X-100 (TX-100) accelerate the process while the cationic surfactant N-Cetylpyridinium chloride (CPC) retards the reaction.
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selection of promoter and micellar catalyst for chromic acid oxidation of tartaric acid in aqueous medium at room temperature
Tenside Surfactants Detergents, 2013Co-Authors: Kakali Mukherjee, Sumanta K Ghosh, Rumki Nandi, Aniruddha Ghosh, Indrajit Saha, Rumpa Saha, Bidyut SahaAbstract:Abstract Chromic acid oxidation of tartaric acid in aqueous acid media produces glycolaldehyde very sluggishly at room temperature. Suitable combination of promoter (2,2′-bipyridine and 1,10-phenanthroline) and micellar catalyst (sodium dodecyl sulphate, Cetylpyridinium chloride, triton X-100) enhances the rate of reaction to almost 14-fold. Observation showed that anionic surfactant (SDS) and nonionic surfactant (TX-100) accelerates the process but cationic surfactant (CPC) retards the reaction. The efficient combination for the production of glycolaldehyde from tartaric acid is found to be 1,10-phenanthroline and SDS.
Xiaoying Jin - One of the best experts on this subject based on the ideXlab platform.
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adsorption of methylene blue and orange ii onto unmodified and surfactant modified zeolite
Journal of Colloid and Interface Science, 2008Co-Authors: Xiaoying Jin, Mingqin Jiang, Xaioquan Shan, Zhiguo Pei, Zuliang ChenAbstract:Adsorption of cationic methylene blue and anionic orange II onto unmodified and surfactant-modified zeolites was studied using a batch equilibration method. The effects of equilibrium time, solution pH, and sorption temperature were examined. The results suggested that 2% sodium dodecyl benzenesulfonate (SDBS)- and 3% sodium dodecyl sulfate (SDS)-modified zeolites had higher adsorption capacities for methylene blue than the unmodified zeolite, while 2% Cetylpyridinium bromide hexadecyl (CPB)- and 2% hexadecylammonium bromide (HDTMA)-modified zeolites were the best adsorbents for orange II. The adsorption conditions were optimized, and the mechanisms of adsorption are briefly discussed.