The Experts below are selected from a list of 18942 Experts worldwide ranked by ideXlab platform
Yong Wang - One of the best experts on this subject based on the ideXlab platform.
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supported metal catalysts for Alcohol Sugar Alcohol steam reforming
ChemInform, 2014Co-Authors: Stephen D. Davidson, He Zhang, Yong Wang, Junming SunAbstract:Despite extensive studies on hydrogen production via steam reforming of Alcohols and Sugar Alcohols, catalysts typically suffer a variety of issues from poor hydrogen selectivity to rapid deactivation. Here, we summarize recent advances in fundamental understanding of functionality and structure of catalysts for Alcohol/Sugar Alcohol steam reforming, and provide perspectives on further development required to design highly efficient steam reforming catalysts.
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Supported metal catalysts for Alcohol/Sugar Alcohol steam reforming
Dalton Transactions, 2014Co-Authors: Stephen D. Davidson, He Zhang, Yong WangAbstract:Despite extensive studies on hydrogen production via steam reforming of Alcohols and Sugar Alcohols, catalysts typically suffer a variety of issues from poor hydrogen selectivity to rapid deactivation. Here, we summarize recent advances in fundamental understanding of functionality and structure of catalysts for Alcohol/Sugar Alcohol steam reforming, and provide perspectives on further development required to design highly efficient steam reforming catalysts.
Stephen D. Davidson - One of the best experts on this subject based on the ideXlab platform.
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supported metal catalysts for Alcohol Sugar Alcohol steam reforming
ChemInform, 2014Co-Authors: Stephen D. Davidson, He Zhang, Yong Wang, Junming SunAbstract:Despite extensive studies on hydrogen production via steam reforming of Alcohols and Sugar Alcohols, catalysts typically suffer a variety of issues from poor hydrogen selectivity to rapid deactivation. Here, we summarize recent advances in fundamental understanding of functionality and structure of catalysts for Alcohol/Sugar Alcohol steam reforming, and provide perspectives on further development required to design highly efficient steam reforming catalysts.
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Supported metal catalysts for Alcohol/Sugar Alcohol steam reforming
Dalton Transactions, 2014Co-Authors: Stephen D. Davidson, He Zhang, Yong WangAbstract:Despite extensive studies on hydrogen production via steam reforming of Alcohols and Sugar Alcohols, catalysts typically suffer a variety of issues from poor hydrogen selectivity to rapid deactivation. Here, we summarize recent advances in fundamental understanding of functionality and structure of catalysts for Alcohol/Sugar Alcohol steam reforming, and provide perspectives on further development required to design highly efficient steam reforming catalysts.
Hyun-sub Park - One of the best experts on this subject based on the ideXlab platform.
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Spontaneous detachment of Streptococcus mutans biofilm by synergistic effect between zwitterion and Sugar Alcohol
Scientific Reports, 2017Co-Authors: Sang-hun Song, Hyun-sub ParkAbstract:A biofilm, a community of microorganisms, is highly resistant to antibiotics, resulting in massive losses in various areas. We herein present a strategy to remove Streptococcus mutans biofilms through a spontaneous exfoliation by the synergistic effect between zwitterion and Sugar Alcohols. It is assumed that the anionic site of zwitterion can be coupled with Sugar Alcohols and the cationic site remains in the state of lacking electrons. The cationic site allows the complexes to be delivered to negatively charged exopolysaccharides of biofilms. This strategy facilitates a significant increase in the ability of Sugar Alcohols to disperse aggregated exopolysaccharides. In this work, it was demonstrated that the mixture of betaine and erythritol existed as a complex in water and that the complex induced a spontaneous detachment of biofilms from the surface to which the biofilms had been adhered. This detachment resulted from a reduction in adhesive forces of the biofilms due to an increase in solubility of bacterial exopolysaccharides. The effects triggered by the formation of complex between zwitterion and Sugar Alcohol provide a simple and safe way to remove biofilms without antibiotics and physical forces.
Sang-hun Song - One of the best experts on this subject based on the ideXlab platform.
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Penetration of an antimicrobial zinc-Sugar Alcohol complex into Streptococcus mutans biofilms
Nature Publishing Group, 2018Co-Authors: Jong Hyun Lim, Sang-hun Song, Yongbeom Jeong, Jae-hyun Ahn, Jeong Rae Lee, Sang-min LeeAbstract:Abstract Mature biofilms are highly resistant to antimicrobial agents due to the presence of extracellular polymeric substances (EPS), which inhibit the penetration of external molecules. In this study, we developed a coordination compound consisting of zinc chloride and erythritol that exhibits penetrating and bactericidal activity against Streptococcus mutans biofilms. An in vitro biofilm model was established in microplates, and bactericidal activity against biofilms was evaluated using an Alamar blue assay. The cause of the antimicrobial activity of the zinc-erythritol mixture on mature biofilms was demonstrated using fast atom bombardment-mass spectrometry, confocal laser scanning microscopy and atomic force microscopy. We demonstrated that zinc chloride spontaneously formed cationic complexes with erythritol in water. The zinc-erythritol complexes reduced intra- and inter-molecular interactions between bacterial exopolysaccharides, a major component of EPS. This activity was confirmed by measuring the attenuation of the hardness of dried polysaccharides isolated from S. mutans biofilms. The reduction in the interactions between polysaccharides allowed the complexes to penetrate into biofilms and kill the embedded bacteria. While approximately 13% of biofilm-associated microbes were killed by a 10 min treatment with 6.6 mM zinc chloride, 45% were killed when a solution containing 19.8 mM erythritol and 6.6 mM zinc chloride was used. This strategy of leveraging the coordination properties of metal ions with Sugar Alcohols provides a simple way to effectively remove mature biofilms using only conventional substances without the need for intricate chemical synthesis processes
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Spontaneous detachment of Streptococcus mutans biofilm by synergistic effect between zwitterion and Sugar Alcohol
Scientific Reports, 2017Co-Authors: Sang-hun Song, Hyun-sub ParkAbstract:A biofilm, a community of microorganisms, is highly resistant to antibiotics, resulting in massive losses in various areas. We herein present a strategy to remove Streptococcus mutans biofilms through a spontaneous exfoliation by the synergistic effect between zwitterion and Sugar Alcohols. It is assumed that the anionic site of zwitterion can be coupled with Sugar Alcohols and the cationic site remains in the state of lacking electrons. The cationic site allows the complexes to be delivered to negatively charged exopolysaccharides of biofilms. This strategy facilitates a significant increase in the ability of Sugar Alcohols to disperse aggregated exopolysaccharides. In this work, it was demonstrated that the mixture of betaine and erythritol existed as a complex in water and that the complex induced a spontaneous detachment of biofilms from the surface to which the biofilms had been adhered. This detachment resulted from a reduction in adhesive forces of the biofilms due to an increase in solubility of bacterial exopolysaccharides. The effects triggered by the formation of complex between zwitterion and Sugar Alcohol provide a simple and safe way to remove biofilms without antibiotics and physical forces.
Sarath A Reddy - One of the best experts on this subject based on the ideXlab platform.
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facile approach to improve solar thermal energy storage efficiency using encapsulated Sugar Alcohol based phase change material
Solar Energy Materials and Solar Cells, 2018Co-Authors: Vignesh Pethurajan, Suresh Sivan, Alan Johny Konatt, Sarath A ReddyAbstract:Abstract Development of novel solar-based energy storage technologies are considered to be one of the primary solutions to fulfill the energy demand. Sugar Alcohol based phase change materials are gaining more attention as a storage medium in thermal energy storage applications. The current study focuses on the synthesis of D -Mannitol (DM) based capsules using the sol-gel technique. The main objective is to control the seepage of DM during phase transition and to increase the thermophysical properties of DM. The synthesis is carried out with pH ranging from 2.0 to 7.0. SEM images showed a well-defined morphology with the uniform spherical shape at pH between 2.6 and 3.0. FTIR spectrum showed the characteristic peaks of silica and DM which suggested the successful encapsulation of DM with silica shell from TEOS source. The average particle size of the microencapsulated DM (MEDM) varied in the range of 45–60 µm. MEDM is subjected to thermal cycling to study the change in heat transfer properties upon cycling. The thermal conductivity of MEDM is found to be 1.77 W/m K, an increase from 1.32 W/m K of DM. From DSC thermograms, the encapsulation ratio and efficiency were observed to be 89.60% and 85.02% respectively. DM exhibited a subcooling temperature of 44.21 °C which was reduced to 11 °C for MEDM. DM is found to degrade initially at a temperature of 276 °C whereas MEDM is found to be 302 °C. The charging and discharging characteristics showed that the time taken to complete one cycle by MEDM lowered compared to DM. The characteristic study of MEDM reveals that it can be used as potential PCM in solar thermal energy storage system.
