The Experts below are selected from a list of 21780 Experts worldwide ranked by ideXlab platform
Hiroyuki Ohno - One of the best experts on this subject based on the ideXlab platform.
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design of phosphonium type zwitterion as an additive to improve Saturated Water Content of phase separated ionic liquid from aqueous phase toward reversible extraction of proteins
International Journal of Molecular Sciences, 2013Co-Authors: Yuki Kohno, Nobuhumi Nakamura, Hiroyuki OhnoAbstract:We designed phosphonium-type zwitterion (ZI) to control the Saturated Water Content of separated ionic liquid (IL) phase in the hydrophobic IL/Water biphasic systems. The Saturated Water Content of separated IL phase, 1-butyl-3-methyimidazolium bis(trifluoromethanesulfonyl)imide, was considerably improved from 0.4 wt% to 62.8 wt% by adding N,N,N-tripentyl-4-sulfonyl-1-butanephosphonium-type ZI (P555C4S). In addition, the maximum Water Content decreased from 62.8 wt% to 34.1 wt% by increasing KH2PO4/K2HPO4 salt Content in upper aqueous phosphate buffer phase. Horse heart cytochrome c (cyt.c) was dissolved selectively in IL phase by improving the Water Content of IL phase, and spectroscopic analysis revealed that the dissolved cyt.c retained its higher ordered structure. Furthermore, cyt. c dissolved in IL phase was re-extracted again from IL phase to aqueous phase by increasing the concentration of inorganic salts of the buffer solution.
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Addition of suitably-designed zwitterions improves the Saturated Water Content of hydrophobic ionic liquids
Chemical Communications, 2012Co-Authors: Yuki Kohno, Nobuhumi Nakamura, Hiroyuki OhnoAbstract:The Saturated Water Content in a hydrophobic ionic liquid, 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)-imide, was improved from 0.4 wt% to 17.8 wt% by adding a 3-(1-butyl-3-imidazolio)propanesulfonate-type zwitterion in appropriate amounts. The mixture containing 17.8 wt% Water successfully dissolved horse heart cytochrome c without significant change of the higher ordered structure.
Roaki H Ishii - One of the best experts on this subject based on the ideXlab platform.
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pushing the limits to tree height could foliar Water storage compensate for hydraulic constraints in sequoia sempervirens
Functional Ecology, 2014Co-Authors: Roaki H Ishii, Wakana Azuma, Keiko Kuroda, Stephen C SillettAbstract:Summary The constraint on vertical Water transport is considered an important factor limiting height growth and maximum attainable height of trees. Here, we show evidence of foliar Water storage as a mechanism that could partially compensate for this constraint in Sequoia sempervirens, the tallest species. We measured hydraulic and morpho-anatomical characteristics of foliated shoots of tall S. sempervirens trees near the wet, northern and dry, southern limits of its geographic distribution in California, USA. The ability to store Water (hydraulic capacitance) and Saturated Water Content (leaf succulence) of foliage both increased with height and light availability, maintaining tolerance of leaves to Water stress (bulk-leaf Water potential at turgor loss) constant relative to height. Transverse-sectional area of Water-storing, transfusion tissue in leaves increased with height, while the area of xylem tissue decreased, indicating increasing allocation to Water storage and decreasing reliance on Water transport from roots. Treetop leaves of S. sempervirens absorb moisture via leaf surfaces and have potential to store more than five times the daily transpirational demand. Thus, foliar Water storage may be an important adaptation that helps maintain physiological function of treetop leaves and hydraulic status of the crown, allowing this species to partially compensate for hydraulic constraints and sustain turgor for both photosynthesis and height growth.
Giora J Kidron - One of the best experts on this subject based on the ideXlab platform.
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towards moss biocrust effects on surface soil Water holding capacity soil Water retention curve analysis and modeling
Geoderma, 2021Co-Authors: Fuhai Sun, Bo Xiao, Giora J KidronAbstract:Abstract As ecosystem engineers in drylands, biocrusts possibly generate great influences on surface soil Water holding capacity and availability, but these effects have not yet been sufficiently investigated, especially through analyzing and modeling their soil Water retention curve (SWRC). On the Loess Plateau of China, the naturally developed moss biocrusts and surface bare soil were sampled in five replicates on loess soil and aeolian sand respectively, and their SWRCs from saturation (soil Water potential = 0 hPa) to dry (soil Water potential = −15,000 hPa) were measured with a sandbox (low Water potential range) in combination with a pressure plate (high Water potential range). The measured SWRCs were compared to the van Genuchten (VG), Brooks and Corey (BC), and Log-Normal Distribution (LND) models, and the model with best performance was adopted to further determine the effects of biocrusts on surface soil Water holding capacity and Water availability through comparing the differences in soil Water Content (θ) at specific Water potentials between the biocrusts and uncrusted soil. Our results showed that (i) the biocrusts always had higher θ as compared with the bare soil across the whole Water potential range, and the increasing effects of the biocrusts was much stronger on aeolian sand (165%) in comparison to that on loess soil (15%). (ii) As compared with the bare soil, the Saturated Water Content, field capacity, wilting point, and available Water Content of the aeolian sand increased by 52%, 256% (0.192 vs. 0.054 cm3 cm−3), 65%, and 1000% by the biocrusts, respectively; while that of the loess soil increased by 28%, 9% (0.240 vs.0.220 cm3 cm−3), 27%, and 8% by the biocrusts, respectively. (iii) The increased Water holding capacity of the biocrusts was possibly attributed to their higher percentage (18% vs. 16%) of microscopic pores (0.3–5 μm) on the loess soil and their increasing (16% vs. 1%) microscopic pores and decreasing (18% vs. 50%) medium pores (30–75 μm) on the aeolian sand. (iv) The VG and LND models performed better (R2 > 0.98, RMSE ≤ 0.019 cm3 cm−3, RE ≤ 7.4%) than the BC model in simulating the SWRCs of the biocrusts and bare soil, and their fitting errors were mostly distributed in the high (−500 to −1000 hPa) and low (
Yuki Kohno - One of the best experts on this subject based on the ideXlab platform.
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design of phosphonium type zwitterion as an additive to improve Saturated Water Content of phase separated ionic liquid from aqueous phase toward reversible extraction of proteins
International Journal of Molecular Sciences, 2013Co-Authors: Yuki Kohno, Nobuhumi Nakamura, Hiroyuki OhnoAbstract:We designed phosphonium-type zwitterion (ZI) to control the Saturated Water Content of separated ionic liquid (IL) phase in the hydrophobic IL/Water biphasic systems. The Saturated Water Content of separated IL phase, 1-butyl-3-methyimidazolium bis(trifluoromethanesulfonyl)imide, was considerably improved from 0.4 wt% to 62.8 wt% by adding N,N,N-tripentyl-4-sulfonyl-1-butanephosphonium-type ZI (P555C4S). In addition, the maximum Water Content decreased from 62.8 wt% to 34.1 wt% by increasing KH2PO4/K2HPO4 salt Content in upper aqueous phosphate buffer phase. Horse heart cytochrome c (cyt.c) was dissolved selectively in IL phase by improving the Water Content of IL phase, and spectroscopic analysis revealed that the dissolved cyt.c retained its higher ordered structure. Furthermore, cyt. c dissolved in IL phase was re-extracted again from IL phase to aqueous phase by increasing the concentration of inorganic salts of the buffer solution.
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Addition of suitably-designed zwitterions improves the Saturated Water Content of hydrophobic ionic liquids
Chemical Communications, 2012Co-Authors: Yuki Kohno, Nobuhumi Nakamura, Hiroyuki OhnoAbstract:The Saturated Water Content in a hydrophobic ionic liquid, 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)-imide, was improved from 0.4 wt% to 17.8 wt% by adding a 3-(1-butyl-3-imidazolio)propanesulfonate-type zwitterion in appropriate amounts. The mixture containing 17.8 wt% Water successfully dissolved horse heart cytochrome c without significant change of the higher ordered structure.
Bo Xiao - One of the best experts on this subject based on the ideXlab platform.
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towards moss biocrust effects on surface soil Water holding capacity soil Water retention curve analysis and modeling
Geoderma, 2021Co-Authors: Fuhai Sun, Bo Xiao, Giora J KidronAbstract:Abstract As ecosystem engineers in drylands, biocrusts possibly generate great influences on surface soil Water holding capacity and availability, but these effects have not yet been sufficiently investigated, especially through analyzing and modeling their soil Water retention curve (SWRC). On the Loess Plateau of China, the naturally developed moss biocrusts and surface bare soil were sampled in five replicates on loess soil and aeolian sand respectively, and their SWRCs from saturation (soil Water potential = 0 hPa) to dry (soil Water potential = −15,000 hPa) were measured with a sandbox (low Water potential range) in combination with a pressure plate (high Water potential range). The measured SWRCs were compared to the van Genuchten (VG), Brooks and Corey (BC), and Log-Normal Distribution (LND) models, and the model with best performance was adopted to further determine the effects of biocrusts on surface soil Water holding capacity and Water availability through comparing the differences in soil Water Content (θ) at specific Water potentials between the biocrusts and uncrusted soil. Our results showed that (i) the biocrusts always had higher θ as compared with the bare soil across the whole Water potential range, and the increasing effects of the biocrusts was much stronger on aeolian sand (165%) in comparison to that on loess soil (15%). (ii) As compared with the bare soil, the Saturated Water Content, field capacity, wilting point, and available Water Content of the aeolian sand increased by 52%, 256% (0.192 vs. 0.054 cm3 cm−3), 65%, and 1000% by the biocrusts, respectively; while that of the loess soil increased by 28%, 9% (0.240 vs.0.220 cm3 cm−3), 27%, and 8% by the biocrusts, respectively. (iii) The increased Water holding capacity of the biocrusts was possibly attributed to their higher percentage (18% vs. 16%) of microscopic pores (0.3–5 μm) on the loess soil and their increasing (16% vs. 1%) microscopic pores and decreasing (18% vs. 50%) medium pores (30–75 μm) on the aeolian sand. (iv) The VG and LND models performed better (R2 > 0.98, RMSE ≤ 0.019 cm3 cm−3, RE ≤ 7.4%) than the BC model in simulating the SWRCs of the biocrusts and bare soil, and their fitting errors were mostly distributed in the high (−500 to −1000 hPa) and low (
