PLGA nanoparticbs system has been widely studied in nowadays because of its biocompatibility,biodegradability and ***,there are several drawbacks when applying this system to bad protein or peptide such as insulin due...
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PLGA nanoparticbs system has been widely studied in nowadays because of its biocompatibility,biodegradability and ***,there are several drawbacks when applying this system to bad protein or peptide such as insulin due to fow drug loading and low drug encapsulation efficbncy.
The nitrogen and oxygen co-doped hollow carbon spheres(HCSs) were prepared via a simple pyrolysis of solid melamine-formaldhyde resin spheres. The carbonization temperature has an important influence on the specific...
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The nitrogen and oxygen co-doped hollow carbon spheres(HCSs) were prepared via a simple pyrolysis of solid melamine-formaldhyde resin spheres. The carbonization temperature has an important influence on the specific surface area, pore-size distribution and heteroatom contents of HCSs. The synergistic effects of those physical and chemical properties on supercapacitor performance were systematically investigated. Among the HCSs obtained at different temperatures, HCSs-800(co-doped HCSs at 800℃) exhibits the best reversible specific capacitance in 2 mol/L H2SO4 electrolyte and meanwhile maintains a high-class capacitance retention capability. The nitrogen heteroatoms were confirmed to play a crucial role in improving capacitance in an acid medium. This kind of nitrogen doved HCSs is a potential candidate for an efficient electrode material for supercapacitors.
Soot formation and growth in propane/air diffusion flames in a wide range of mole ratio of propane to air from 0.01 to 0.1 have been studied experimentally and theoretically. The concentration of acetylene, soot yield...
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We go beyond the approximate series expansions used in the dispersion theory of finite-size atoms. We demonstrate that a correct, and nonperturbative, theory dramatically alters the dispersion self-energies of atoms. ...
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We go beyond the approximate series expansions used in the dispersion theory of finite-size atoms. We demonstrate that a correct, and nonperturbative, theory dramatically alters the dispersion self-energies of atoms. The nonperturbed theory gives as much as 100% corrections compared to the traditional series-expanded theory for the smaller noble gas atoms.
Recently, the acoustic performance of reactive mufflers under space constraint became important. In this paper the attenuation performance of single and double expansion-chambers under space constraint is presented us...
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This essay describes the findings of generating the electrode composite of polyaniline/activated carbon fiber (PANI/ACF) by repeatedly immersing eigenstate PANI into the solution of NMP and CHCl3 added with VC. A samp...
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Hollow silica core/mesoporous silica shell monodisperse uniform spheres were synthesized via a dual-templating method. Specifically designed polystyrene (PS) coated by silica as the core template, while cetyltrimethyl...
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Magnesium production by Pidgeon process has been developed very fast in China since 1990’s. The waste slag from magnesium production has attracted broad attention because the huge amounts of the slag. For each ton of...
Magnesium production by Pidgeon process has been developed very fast in China since 1990’s. The waste slag from magnesium production has attracted broad attention because the huge amounts of the slag. For each ton of magnesium produced, there will be 6-8 tons of the slag generated. A big part of the Mg slag exists as fine dust with particle size of D95 < 0.1mm, which may pollute air, soil and water surrounding the Mg industry. The fine particles are generated by phase transformations of dicalcium silicate C2S (2CaO⋅SiO2) during the slag cooling. There is a volume expansion of more than 10% with the transformation of β-C2S to γ-C2S phase, causing a disintegration or dusting of the Mg slag. In the present study, several chemical stabilizers were used to treat the dusting Mg slag at 1200°C, including borates, phosphates and rare earth oxides, in order to obtain volume stable slag aggregates for environmental protection and recycling of the Mg slag. The volume expanding rates of the samples were measured. XRD and SEM studies were carried out to confirm effects of the stabilizers. The results show that all of the stabilizers were effective for the stabilization of Mg slag. Some differences between the stabilizers were also described and discussed.
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