The Experts below are selected from a list of 312 Experts worldwide ranked by ideXlab platform
H Hoste - One of the best experts on this subject based on the ideXlab platform.
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ellagitannins inhibit the exsheathment of haemonchus contortus and trichostrongylus colubriformis larvae the efficiency increases together with the Molecular Size
Journal of Agricultural and Food Chemistry, 2020Co-Authors: Maarit Karonen, Jeffrey R Ahern, Lucie Legroux, Jussi Suvanto, Marica T Engstrom, Jari Sinkkonen, Juhapekka Salminen, H HosteAbstract:Worldwide, parasitic gastrointestinal nematodes continue to threaten animal health, welfare and production in outdoor breeding systems of small ruminants. For more than 50 years, the control of the...
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ellagitannins inhibit the exsheathment of haemonchus contortus and trichostrongylus colubriformis larvae the efficiency increases together with the Molecular Size
Journal of Agricultural and Food Chemistry, 2020Co-Authors: Maarit Karonen, Jeffrey R Ahern, Lucie Legroux, Jussi Suvanto, Marica T Engstrom, Jari Sinkkonen, Juhapekka Salminen, H HosteAbstract:Worldwide, parasitic gastrointestinal nematodes continue to threaten animal health, welfare, and production in outdoor breeding systems of small ruminants. For more than 50 years, the control of th...
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ellagitannins inhibit the exsheathment of haemonchus contortus and trichostrongylus colubriformis larvae the efficiency increases together with the Molecular Size
Journal of Agricultural and Food Chemistry, 2020Co-Authors: Maari Karone, Jussi Suvanto, Marica T Engstrom, Jeffrey R Ahe, Lucie Legrou, Jari Sinkkone, Juhapekka Salmine, H HosteAbstract:Worldwide, parasitic gastrointestinal nematodes continue to threaten animal health, welfare, and production in outdoor breeding systems of small ruminants. For more than 50 years, the control of these parasitic worms has relied on the use of commercial synthetic anthelmintics. However, anthelmintic resistance in worm populations is nowadays widespread and requires novel solutions. The use of tannin-rich plants has been suggested as an alternative to synthetic anthelmintics to control gastrointestinal nematodes. The majority of previous studies have focused on the activity of proanthocyanidins (syn condensed tannins), and less is known about ellagitannins. In this study, the effects of 30 structurally unique ellagitannins on the exsheathment of third-stage infective larvae were examined on Haemonchus contortus and Trichostrongylus colubriformis by the in vitro larval exsheathment inhibition assay. Ellagitannins were found to be promising natural anthelmintics as they showed direct inhibition on larval exsheathment for both nematode species. In general, ellagitannins were more efficient at inhibiting the exsheathment of H. contortus larvae than those of T. colubriformis. The efficiency of inhibition increased as the degree of oligomerization or the Molecular weight of the ellagitannin increased. Otherwise, we found no other structural features of ellagitannins that significantly affected the anthelmintic activity on the third-stage infective larvae. The effective concentrations were physiologically relevant and should be achievable in the gastrointestinal tract also in in vivo conditions.
Lian Yu - One of the best experts on this subject based on the ideXlab platform.
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effect of Molecular Size and hydrogen bonding on three surface facilitated processes in Molecular glasses surface diffusion surface crystal growth and formation of stable glasses by vapor deposition
Journal of Chemical Physics, 2019Co-Authors: Yinshan Chen, Zhenxuan Chen, Michael Tylinski, M D Ediger, Lian YuAbstract:Recent work has shown that diffusion and crystal growth can be much faster on the surface of Molecular glasses than in the interior and that the enhancement effect varies with Molecular Size and interMolecular hydrogen bonds (HBs). In a related phenomenon, some molecules form highly stable glasses when vapor-deposited, while others (notably those forming extensive HBs) do not. Here we examine all available data on these phenomena for quantitative structure-property relations. For the systems that form no HBs, the surface diffusion coefficient Ds decreases with increasing Molecular Size d (d = Ω1/3, where Ω is the Molecular volume); when evaluated at the glass transition temperature Tg, Ds decreases ∼5 orders of magnitude for 1 nm of increase in d. Assuming that center-of-mass diffusion is limited by the deepest part of the molecule in the surface-mobility gradient, these data indicate a mobility gradient in reasonable agreement with the Elastically Collective Nonlinear Langevin Equation theory prediction for polystyrene as disjointed Kuhn monomers. For systems of similar d, the Ds value decreases with the extent of interMolecular HB, x (HB), defined as the fraction of vaporization enthalpy due to HB. For both groups together (hydrogen-bonded and otherwise), the Ds data collapse when plotted against d/[1 − x(HB)]; this argues that the HB effect on Ds can be described as a narrowing of the surface mobility layer by a factor [1 − x(HB)] relative to the van der Waals systems. Essentially the same picture holds for the surface crystal growth rate us. The kinetic stability of a vapor-deposited glass decreases with x(HB) but is not better organized by the combined variable d/[1 − x(HB)]. These results indicate that surface crystal growth depends strongly on surface diffusion, whereas the formation of stable glasses by vapor deposition may depend on other factors.Recent work has shown that diffusion and crystal growth can be much faster on the surface of Molecular glasses than in the interior and that the enhancement effect varies with Molecular Size and interMolecular hydrogen bonds (HBs). In a related phenomenon, some molecules form highly stable glasses when vapor-deposited, while others (notably those forming extensive HBs) do not. Here we examine all available data on these phenomena for quantitative structure-property relations. For the systems that form no HBs, the surface diffusion coefficient Ds decreases with increasing Molecular Size d (d = Ω1/3, where Ω is the Molecular volume); when evaluated at the glass transition temperature Tg, Ds decreases ∼5 orders of magnitude for 1 nm of increase in d. Assuming that center-of-mass diffusion is limited by the deepest part of the molecule in the surface-mobility gradient, these data indicate a mobility gradient in reasonable agreement with the Elastically Collective Nonlinear Langevin Equation theory prediction ...
M D Edige - One of the best experts on this subject based on the ideXlab platform.
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effect of Molecular Size and hydrogen bonding on three surface facilitated processes in Molecular glasses surface diffusion surface crystal growth and formation of stable glasses by vapor deposition
Journal of Chemical Physics, 2019Co-Authors: Yinsha Che, Michael Tylinski, Zhenxua Che, M D EdigeAbstract:Recent work has shown that diffusion and crystal growth can be much faster on the surface of Molecular glasses than in the interior and that the enhancement effect varies with Molecular Size and interMolecular hydrogen bonds (HBs). In a related phenomenon, some molecules form highly stable glasses when vapor-deposited, while others (notably those forming extensive HBs) do not. Here we examine all available data on these phenomena for quantitative structure-property relations. For the systems that form no HBs, the surface diffusion coefficient Ds decreases with increasing Molecular Size d (d = Ω1/3, where Ω is the Molecular volume); when evaluated at the glass transition temperature Tg, Ds decreases ∼5 orders of magnitude for 1 nm of increase in d. Assuming that center-of-mass diffusion is limited by the deepest part of the molecule in the surface-mobility gradient, these data indicate a mobility gradient in reasonable agreement with the Elastically Collective Nonlinear Langevin Equation theory prediction for polystyrene as disjointed Kuhn monomers. For systems of similar d, the Ds value decreases with the extent of interMolecular HB, x (HB), defined as the fraction of vaporization enthalpy due to HB. For both groups together (hydrogen-bonded and otherwise), the Ds data collapse when plotted against d/[1 − x(HB)]; this argues that the HB effect on Ds can be described as a narrowing of the surface mobility layer by a factor [1 − x(HB)] relative to the van der Waals systems. Essentially the same picture holds for the surface crystal growth rate us. The kinetic stability of a vapor-deposited glass decreases with x(HB) but is not better organized by the combined variable d/[1 − x(HB)]. These results indicate that surface crystal growth depends strongly on surface diffusion, whereas the formation of stable glasses by vapor deposition may depend on other factors.Recent work has shown that diffusion and crystal growth can be much faster on the surface of Molecular glasses than in the interior and that the enhancement effect varies with Molecular Size and interMolecular hydrogen bonds (HBs). In a related phenomenon, some molecules form highly stable glasses when vapor-deposited, while others (notably those forming extensive HBs) do not. Here we examine all available data on these phenomena for quantitative structure-property relations. For the systems that form no HBs, the surface diffusion coefficient Ds decreases with increasing Molecular Size d (d = Ω1/3, where Ω is the Molecular volume); when evaluated at the glass transition temperature Tg, Ds decreases ∼5 orders of magnitude for 1 nm of increase in d. Assuming that center-of-mass diffusion is limited by the deepest part of the molecule in the surface-mobility gradient, these data indicate a mobility gradient in reasonable agreement with the Elastically Collective Nonlinear Langevin Equation theory prediction ...
Michael Tylinski - One of the best experts on this subject based on the ideXlab platform.
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effect of Molecular Size and hydrogen bonding on three surface facilitated processes in Molecular glasses surface diffusion surface crystal growth and formation of stable glasses by vapor deposition
Journal of Chemical Physics, 2019Co-Authors: Yinshan Chen, Zhenxuan Chen, Michael Tylinski, M D Ediger, Lian YuAbstract:Recent work has shown that diffusion and crystal growth can be much faster on the surface of Molecular glasses than in the interior and that the enhancement effect varies with Molecular Size and interMolecular hydrogen bonds (HBs). In a related phenomenon, some molecules form highly stable glasses when vapor-deposited, while others (notably those forming extensive HBs) do not. Here we examine all available data on these phenomena for quantitative structure-property relations. For the systems that form no HBs, the surface diffusion coefficient Ds decreases with increasing Molecular Size d (d = Ω1/3, where Ω is the Molecular volume); when evaluated at the glass transition temperature Tg, Ds decreases ∼5 orders of magnitude for 1 nm of increase in d. Assuming that center-of-mass diffusion is limited by the deepest part of the molecule in the surface-mobility gradient, these data indicate a mobility gradient in reasonable agreement with the Elastically Collective Nonlinear Langevin Equation theory prediction for polystyrene as disjointed Kuhn monomers. For systems of similar d, the Ds value decreases with the extent of interMolecular HB, x (HB), defined as the fraction of vaporization enthalpy due to HB. For both groups together (hydrogen-bonded and otherwise), the Ds data collapse when plotted against d/[1 − x(HB)]; this argues that the HB effect on Ds can be described as a narrowing of the surface mobility layer by a factor [1 − x(HB)] relative to the van der Waals systems. Essentially the same picture holds for the surface crystal growth rate us. The kinetic stability of a vapor-deposited glass decreases with x(HB) but is not better organized by the combined variable d/[1 − x(HB)]. These results indicate that surface crystal growth depends strongly on surface diffusion, whereas the formation of stable glasses by vapor deposition may depend on other factors.Recent work has shown that diffusion and crystal growth can be much faster on the surface of Molecular glasses than in the interior and that the enhancement effect varies with Molecular Size and interMolecular hydrogen bonds (HBs). In a related phenomenon, some molecules form highly stable glasses when vapor-deposited, while others (notably those forming extensive HBs) do not. Here we examine all available data on these phenomena for quantitative structure-property relations. For the systems that form no HBs, the surface diffusion coefficient Ds decreases with increasing Molecular Size d (d = Ω1/3, where Ω is the Molecular volume); when evaluated at the glass transition temperature Tg, Ds decreases ∼5 orders of magnitude for 1 nm of increase in d. Assuming that center-of-mass diffusion is limited by the deepest part of the molecule in the surface-mobility gradient, these data indicate a mobility gradient in reasonable agreement with the Elastically Collective Nonlinear Langevin Equation theory prediction ...
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effect of Molecular Size and hydrogen bonding on three surface facilitated processes in Molecular glasses surface diffusion surface crystal growth and formation of stable glasses by vapor deposition
Journal of Chemical Physics, 2019Co-Authors: Yinsha Che, Michael Tylinski, Zhenxua Che, M D EdigeAbstract:Recent work has shown that diffusion and crystal growth can be much faster on the surface of Molecular glasses than in the interior and that the enhancement effect varies with Molecular Size and interMolecular hydrogen bonds (HBs). In a related phenomenon, some molecules form highly stable glasses when vapor-deposited, while others (notably those forming extensive HBs) do not. Here we examine all available data on these phenomena for quantitative structure-property relations. For the systems that form no HBs, the surface diffusion coefficient Ds decreases with increasing Molecular Size d (d = Ω1/3, where Ω is the Molecular volume); when evaluated at the glass transition temperature Tg, Ds decreases ∼5 orders of magnitude for 1 nm of increase in d. Assuming that center-of-mass diffusion is limited by the deepest part of the molecule in the surface-mobility gradient, these data indicate a mobility gradient in reasonable agreement with the Elastically Collective Nonlinear Langevin Equation theory prediction for polystyrene as disjointed Kuhn monomers. For systems of similar d, the Ds value decreases with the extent of interMolecular HB, x (HB), defined as the fraction of vaporization enthalpy due to HB. For both groups together (hydrogen-bonded and otherwise), the Ds data collapse when plotted against d/[1 − x(HB)]; this argues that the HB effect on Ds can be described as a narrowing of the surface mobility layer by a factor [1 − x(HB)] relative to the van der Waals systems. Essentially the same picture holds for the surface crystal growth rate us. The kinetic stability of a vapor-deposited glass decreases with x(HB) but is not better organized by the combined variable d/[1 − x(HB)]. These results indicate that surface crystal growth depends strongly on surface diffusion, whereas the formation of stable glasses by vapor deposition may depend on other factors.Recent work has shown that diffusion and crystal growth can be much faster on the surface of Molecular glasses than in the interior and that the enhancement effect varies with Molecular Size and interMolecular hydrogen bonds (HBs). In a related phenomenon, some molecules form highly stable glasses when vapor-deposited, while others (notably those forming extensive HBs) do not. Here we examine all available data on these phenomena for quantitative structure-property relations. For the systems that form no HBs, the surface diffusion coefficient Ds decreases with increasing Molecular Size d (d = Ω1/3, where Ω is the Molecular volume); when evaluated at the glass transition temperature Tg, Ds decreases ∼5 orders of magnitude for 1 nm of increase in d. Assuming that center-of-mass diffusion is limited by the deepest part of the molecule in the surface-mobility gradient, these data indicate a mobility gradient in reasonable agreement with the Elastically Collective Nonlinear Langevin Equation theory prediction ...
Ángel Piñeiro - One of the best experts on this subject based on the ideXlab platform.
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a small Molecular Size system giving unexpected surface effects α cyclodextrin sodium dodecyl sulfate in water
Journal of Colloid and Interface Science, 2008Co-Authors: Jorge Hernandezpascacio, Silvia Perezcasas, Miguel Costas, Alfredo Amigo, Xavier Banquy, Ángel PiñeiroAbstract:Abstract Maximum drop volumes (MDV) and the resultant surface tension values (σ) of α-cyclodextrin (α-CD) + sodium dodecyl sulfate (SDS) aqueous mixtures have been determined over a broad concentration range of both solutes at 283.15, 293.15, 303.15, 313.15, and 323.15 K. Drops significantly larger than those of pure water (up to ∼25% larger) were observed at low temperatures for solutions with [α-CD]/[SDS] concentration ratios, ≳2, producing unexpectedly high surface tension values. Our results indicate that at certain solute concentration ratios and temperatures, the drop volume method provides wrong values for equilibrium surface tensions. This is due to the high viscoelasticity of the surface film whose effect is important even though the injection rate of the drops was slow and the solutes Molecular Sizes are small.
