Publications by authors named "Sheng-pei Chen"

Purpose: This study demonstrates noninvasive prenatal testing (NIPT) for Duchenne muscular dystrophy (DMD) using a newly developed haplotype-based approach.

Methods: Eight families at risk for DMD were recruited for this study. Parental haplotypes were constructed using target-region sequencing data from the parents and the probands.

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  • Researchers successfully created Pt triambic icosahedral nanocrystals (TIH NCs) using an electrochemical method in deep eutectic solvents.
  • These nanocrystals featured {771} high-index facets, which contributed to their unique properties.
  • The TIH NCs demonstrated superior electrocatalytic activity and stability for ethanol electrooxidation compared to a commercial Pt black catalyst.
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Preimplantation genetic diagnosis and screening are widely accepted for chromosomal abnormality identification to avoid transferring embryos with genetic defects. Massively parallel sequencing (MPS) is a rapidly developing approach for genome analysis with increasing application in clinical practice. The purpose of this study was to use MPS for identification of aneuploidies and unbalanced chromosomal rearrangements after blastocyst biopsy.

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Improved performance through milling: A method for enhancing the catalytic activity of supported metal nanoparticles is reported. This method enhances the activity for the ethanol electro-oxidation of a supported palladium catalyst. The much higher catalytic performance is ascribed to the increased electrochemically active surface area as well as the generation of high-index facets at the milled nanoparticle surface.

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  • Fe nanocrystal catalysts were synthesized using electrochemistry, resulting in shape transformations from rhombic dodecahedra and tetragonal bipyramids to complex polyhedra and eventually to cubes with distinct facet compositions.
  • The morphology change involved varying proportions of {110} and {100} facets throughout the transformation process.
  • Research demonstrated that the electrocatalytic activity for nitrite reduction improved as the percentage of {100} facets on the surface of the Fe nanocrystals increased.
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Electrochemical in situ Fourier transform infrared reflection spectroscopy was used in the investigation of electrocatalytic reduction of oxalic acid on Pb electrode. The multi-step potential FTIRS and time-resolved FTIRS procedures were used in the present study. The results of MSFTIRS demonstrate that glyoxylic acid could be detected below -0.

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Carbon supported PtSn catalyst (PtSn/C) was prepared by a modified polyol method and characterized by means of XRD. It was showed that the metal particle size was 2.2 nm and the unit cell parameter increased compared with Pt/C.

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The adsorption and oxidation of 1-butanol in alkaline media on a platinum electrode were investigated mainly by EQCM and in situ FTIR spectroscopy. The experimental results demonstrate that the electrooxidation of 1-butanol is closely relative to solution acidity. Since no chemically adsorbed species, such as CO, were evidenced by in situ FTIR spectroscopy, the adsorption of 1-butanol or its dissociative products on Pt surface is suggested by EQCM and CV data.

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  • A new method using ion chromatography (IC) and a conductivity detector has been developed to analyze glyoxal, glycolic acid, oxalic acid, and glyoxylic acid, marking its first application in glyoxylic acid electrosynthesis.
  • The method enables simultaneous separation and quantification of these substances during electrochemical reactions, with an ideal eluent being either Na2CO3-NaHCO3 or NaOH-Na2CO3.
  • Results show high detection sensitivity (better than ppm), consistency with variation coefficients below 2%, and recovery rates between 97-103%, proving the method to be selective, fast, and easy to use.
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  • A new method combining electrochemical in situ microscope IR reflection spectroscopy and step-scan time-resolved FTIR was developed using specific instruments and a custom synchronizer for data collection.
  • The techniques were applied to investigate the infrared properties of 2D nanomaterials, specifically examining how CO adsorption reveals changes in the nanostructured Pt microelectrodes.
  • Results showed that as potential cycling time increased, the behavior of the CO absorption changed, enhancing the sensitivity and allowing for rapid time-resolution measurements at solid/liquid interfaces.
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Thin films of different nanostructures on an array of nine Pt microelectrodes were prepared by applying a square wave potential treatment for different times (tau). It has been measured from the cyclic voltammetric studies that the relative surface roughness of the films was increased slightly and reached a maximal value of about 2.5.

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Electrocatalytic properties of three electrodes for formic acid oxidation were studied by using electrochemical in situ FTIR spectroscopy and cyclic voltammetry in this paper. It is demonstrated that the electrocatalytical mechanism of formic acid oxidation on platinum-dispersed carbon(Pt/GC) is similar to that on massive platinum, which involves two paths, i.e.

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