The chelating adsorption performance and mechanism of HQ-PHEMA/SiO2 towards Cu2+ and Ni2+ ions was studied, and the adsorption thermodynamics was investigated.
RESULTSThe experimental results show that HQ-PHEMA/SiO2 possesses a strong adsorption affinity for heavy metal ions owing to BKM120 the high density of the HQ group, and for Cu2+ and
Ni2+ ions, the adsorption capacities were up to 63.4 mg g(-1) and 51.1 mg g(-1), respectively. The adsorption behavior fits the Langmuir model, and the adsorption enthalpy change H is positive, indicating endothermic chemisorption. The value of the entropy change S is also positive, and the higher value of |TS| suggests that the adsorption process is entropically driven.
CONCLUSIONHQ-PHEMA/SiO2 is a promising material for the effective removal of heavy metal ions from water. (c) 2013 Society of Chemical Industry”
“SmCo5(0001) epitaxial films were prepared on Cu(111) single-crystal underlayers formed G418 chemical structure on Al2O3(0001) substrates at 500 degrees C. The nucleation and growth mechanism of (0001)-oriented SmCo5 crystal on Cu(111) underlayer
is investigated and a method to control the nucleation is proposed. The SmCo5 epitaxial thin film formed directly on Cu underlayer consists of two types of domains whose orientations are rotated around the film normal by 30 each other. By introducing a thin Co seed layer on the Cu underlayer, a SmCo5(0001) single-crystal thin film is successfully obtained. Nucleation of SmCo5 crystal on Cu underlayer seems controllable by varying the interaction between the Cu underlayer and the SmCo5 layer. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3090828]“
“OBJECTIVE
To evaluate the efficacy and safety of the low-fluence 1,064-nm Q-switched neodymium-doped yttrium aluminium garnet (QSNY) laser in treating infraorbital dark circles.
PARTICIPANTS AND METHODS
Thirty women with infraorbital dark circles (predominant color dark brown) participated in this open-label study. Participants underwent eight sessions of low-fluence QSNY laser treatment at 4.2 J/cm2 at 3- to 4-day intervals.
A spot click here size of 3.5 mm was used, with a pulse duration of 8 ns. The melanin deposition in the lesional skin was observed in vivo using reflectance confocal microscopy (RCM). Morphologic changes were evaluated using a global evaluation, an overall self-assessment, a narrow-band reflectance spectrophotometer, and a skin hydration measurement instrument.
RESULTS
Twenty-six of 30 patients showed global improvement that they rated as excellent or good. Twenty-eight rated their overall satisfaction as excellent or good. The melanin index indicated a substantial decrease, from 225.84 at baseline to 182.65 (p <.05). RCM results showed a dramatic decrease of melanin deposition in the upper dermis. Adverse effects were minimal.