The artificial surfaces are applied to study the pool boiling features, including the bubble behaviors, the surface temperature fluctuation, the heat transfer characteristics and nucleate site interaction. Three sets ...The artificial surfaces are applied to study the pool boiling features, including the bubble behaviors, the surface temperature fluctuation, the heat transfer characteristics and nucleate site interaction. Three sets of experiments are carried out to investigate the influences of cavity shape, cavity size, cavity spacing on the boiling phenomena. Experimental results reveal that bubbling from the cylindrical as well as reentrant cavity is generally stable. The influence of cavity diameter on the bubble behaviors and the temperature fluctuation seems very weak while the effect of cavity depth cannot be neglected. As for the two cavity conditions, the bubble behaviors show the different features depending on the dimensionless cavity spacing. Three significant factors (thermal interaction, hydraulic interaction, bubble coalescence) control the nucleation site interaction, and the competition and dominance of the factors yield four interaction regimes.展开更多
Despite our recognition for biological role and es-sentiality of zinc （Zn）in human nutrtion,clinical as-sessment of Zn status remains highly problematic.Recent animal studies showed the change in plasmaACE （one of ...Despite our recognition for biological role and es-sentiality of zinc （Zn）in human nutrtion,clinical as-sessment of Zn status remains highly problematic.Recent animal studies showed the change in plasmaACE （one of the Zn-enzymes） with addition of Zn invitro was greater corresponding to the feeding periodof Zn deficient diet.In this study,we examinedwhether ACE ratio （increase with Zn/basal Ace）could be a sensitive parameter of Zn nutrition in hu-mans as well.ACE ratio was determined by the in-crement of ACE when added 450μmol/L of ZnSO4.4H<sub>2</sub>O to equivalent amount of plasma.which mightbe the optimal concentration in our preliminary study.In adult patients with intestinal failure receiving homeparenteral nutrition（HPN;100～220μmol/day of Znwas administered） (short bowel syndrome;3,展开更多
基金The authors would like to express their gratitude to Prof. D.J. Lee of National Taiwan University who has provided many suggestions to the present research on nucleation site interaction.
文摘The artificial surfaces are applied to study the pool boiling features, including the bubble behaviors, the surface temperature fluctuation, the heat transfer characteristics and nucleate site interaction. Three sets of experiments are carried out to investigate the influences of cavity shape, cavity size, cavity spacing on the boiling phenomena. Experimental results reveal that bubbling from the cylindrical as well as reentrant cavity is generally stable. The influence of cavity diameter on the bubble behaviors and the temperature fluctuation seems very weak while the effect of cavity depth cannot be neglected. As for the two cavity conditions, the bubble behaviors show the different features depending on the dimensionless cavity spacing. Three significant factors (thermal interaction, hydraulic interaction, bubble coalescence) control the nucleation site interaction, and the competition and dominance of the factors yield four interaction regimes.
文摘Despite our recognition for biological role and es-sentiality of zinc （Zn）in human nutrtion,clinical as-sessment of Zn status remains highly problematic.Recent animal studies showed the change in plasmaACE （one of the Zn-enzymes） with addition of Zn invitro was greater corresponding to the feeding periodof Zn deficient diet.In this study,we examinedwhether ACE ratio （increase with Zn/basal Ace）could be a sensitive parameter of Zn nutrition in hu-mans as well.ACE ratio was determined by the in-crement of ACE when added 450μmol/L of ZnSO4.4H<sub>2</sub>O to equivalent amount of plasma.which mightbe the optimal concentration in our preliminary study.In adult patients with intestinal failure receiving homeparenteral nutrition（HPN;100～220μmol/day of Znwas administered） (short bowel syndrome;3,
