基礎講座 電気泳動(Electrophoresis)

The development of novel materials is a fundamental focal point of chemical research; and this interest is mandated by advancements in all areas of industry and technology. A good example of the synergism between scientific discovery and technological development is the electronics industry, where discoveries of new semiconducting materials resulted in the evolution from vacuum tubes to diodes and transistors, and eventually to miniature chips. The progression of this technology led to the development * To whom correspondence should be addressed. B.L.C.: (504) 2801385 (phone); (504) 280-3185 (fax); bcushing@uno.edu (e-mail). C.J.O.: (504)280-6846(phone);(504)280-3185(fax);coconnor@uno.edu (e-mail). 3893 Chem. Rev. 2004, 104, 3893−3946

http://depa.fquim.unam.mx/amyd//archivero/FidelmarLechugaSanabria_4940.pdf

Recent advances in the liquid-phase syntheses of inorganic nanoparticles.

1: Magnetic Particles: Preparation, Properties and Applications: M. Ozaki. 2: Maghemite (gamma-Fe2O3): A Versatile Magnetic Colloidal Material C.J. Serna, M.P. Morales. 3: Dynamics of Adsorption and Oxidation of Organic Molecules on Illuminated Titanium Dioxide Particles Immersed in Water M.A. Blesa, R.J. Candal, S.A. Bilmes. 4: Colloidal Aggregation in Two-Dimensions A. Moncho-Jorda, F. Martinez-Lopez, M.A. Cabrerizo-Vilchez, R. Hidalgo Alvarez, M. Quesada-PMerez. 5: Kinetics of Particle and Protein Adsorption Z. Adamczyk.

Surface and Colloid Science

This chapter introduces the finite element method (FEM) as a tool for solution of classical electromagnetic problems. Although we discuss the main points in the application of the finite element method to electromagnetic design, including formulation and implementation, those who seek deeper understanding of the finite element method should consult some of the works listed in the bibliography section.

Introduction to the Finite Element Method

Applied Numerical Analysis. By C.F. Gerald. Pp. xii, 340. £3·60. 1970. (Addison-Wesley.)

A theoretical analysis on the controlled release of an active reagent from an inwardly tapered polymeric disk with a central releasing hole proposed originally by Bechard and McMullen (J Pharm Sci 77:222–228, 1988) is conducted. Analytic expressions for the temporal variations in the amount of reagent released and the size of the unreleased portion of the device are derived. Relaxing their assumptions of pseudo-steady and constant reagent concentration in the hole, the problem is reanalyzed. The resultant model is suitable to the whole release period, and successfully describes their experimental data. To make the analytic result derived more readily applicable, the results for some special cases are also presented.

Modeling the release of a reagent from an inwardly tapered disk with a central hole

Although challenges remain, synergistic adjusting various microstructures and photo/electrochemical parameters of graphitic carbon nitride (g-C3 N4 ) in photocatalytic hydrogen evolution reaction (HER) are the keys to alleviating the energy crisis and environmental pollution. In this work, a novel nitrogen-defective and sulfur-doped g-C3 N4 (S-g-C3 N4 -D) is designed elaborately. Subsequent physical and chemical characterization proved that the developed S-g-C3 N4 -D not only displays well-defined 2D lamellar morphology with a large porosity and a high specific surface area but also has an efficient light utilization and carriers-separation and transfer. Moreover, the calculated optimal Gibbs free energy of adsorbed hydrogen (ΔGH* ) for S-g-C3 N4 -D at the S active sites is close to zero (≈0.24 eV) on the basis of first-principle density functional theory (DFT). Accordingly, the developed S-g-C3 N4 -D catalyst shows a high H2 evolution rate of 5651.5 µmol g-1  h-1 . Both DFT calculations and experimental results reveal that a memorable defective g-C3 N4 /S-doped g-C3 N4 step-scheme heterojunction is constructed between S-doped domains and N-defective domains in the structural configuration of S-g-C3 N4 -D. This work exhibits a significant guidance for the design and fabrication of high-efficiency photocatalysts.

Tailoring Advanced N-Defective and S-Doped g-C3 N4 for Photocatalytic H2 Evolution.

Quantifying qualitative relations about colors through fuzzy and statistical operations

The capillary electrophoresis (CE) technique has been widely used to improve our understanding of biochemistry, and has become one of the best choices to address critical issues in neurobiology. In this study, doubled-emulsified solid lipid nanoparticles (DESLNs) grafted with PPFLMLLKGSTR (PM12) were fabricated to carry retinoic acid (RnA) and nerve growth factor (NGF), and to differentiate induced pluripotent stem cells (iPSCs) into nerve cells. The membrane charge of differentiated neuron-like cells was investigated using a high-performance CE. We found that surface PM12 enhanced the uptake of RnA- and NGF-loaded DESLNs (RnA-NGF-DESLNs) via strong interaction with cellular integrin α3β1 and α5β1, as evidenced by immunofluorescence assay. Further, highly expressed βIII-tubulin, a typical neuronal marker, suggested the improved neurite outgrowth of differentiating iPSCs. The enhanced electrophoretic mobility also demonstrated the reproduction of neurons from iPSCs treated with various kinds of DESLNs. After longer induction, the major CE elution peak appeared in shorter time, evidencing an increase in electrostatic potential (more negative) and effective neuronal regeneration. Induction with PM12-RnA-NGF-DESLNs to differentiate iPSCs resulted in the largest electrophoretic mobility (more negative), zeta potential and membrane charge. Thus, this study showed the ability of CE to analyze the charge variation during guided differentiation of iPSCs with drug carriers, and the CE method can be promising in evaluating the formation of matured neurons from iPSCs.

Electrophoretic mobility of neuron-like cells regenerated from iPSCs with induction of retinoic acid- and nerve growth factor-loaded solid lipid nanoparticles

Jyh-Ping Hsu

Papers

Modeling the release of a reagent from an inwardly tapered disk with a central hole

Tailoring Advanced N-Defective and S-Doped g-C3 N4 for Photocatalytic H2 Evolution.

Quantifying qualitative relations about colors through fuzzy and statistical operations

Electrophoretic mobility of neuron-like cells regenerated from iPSCs with induction of retinoic acid- and nerve growth factor-loaded solid lipid nanoparticles

Ion transport in a non-isothermal electrokinetic energy conversion system