Search results for: Cheng-Chun Chen

Items from 1 to 10 out of 10 results

article

Brønsted Acid‐Promoted Benzannulation of o‐Alkynylbenzaldehyde and Alkyne, and the Positive Effect of Propargyl Alcohol

Cheng‐Chun Chen, Tzu‐Hsuan Kuan, Wen‐Wei Yuan, Shih‐En Chen, more

Advanced Synthesis & Catalysis > 364 > 23 > 4122 - 4134

Bromotrimethylsilane‐promoted benzannulation of o‐alkynylbenzaldehydes and alkynes to yield 1‐naphthyl aryl ketones is reported. The reaction conditions are mild, metal‐free, and do not require pretreatment/protection of the substrates. We found that aryl propargyl alcohols were very effective substrates for this reaction, compared with other alkynes. Studies on the reaction scope, monitoring the...

article

Enhanced surfactin production via the addition of layered double hydroxides

Shu-Chen Kan, Chih-Chen Lee, Yu-Che Hsu, Yu-Hsiang Peng, more

Journal of the Taiwan Institute of Chemical Engineers > 2017 > 80 > C > 10-15

In this study, Mg–Al layered double hydride (LDH) was prepared and the impact of LDH addition on the biomass and surfactin yield for cultures of Bacillus subtilis CWS1 was examined. Various solid additives, including montmorillonite (MMT), activated carbon (AC) and LDH, were tested. Among these, LDH triggered the highest surfactin yield at 3789 mg/L. The optimal conditions for surfactin production...

article

Susceptibility-weighted imaging of the venous networks around the brain stem

Ming Cai, Xiao-Fen Zhang, Hui-Huang Qiao, Zhong-Xiao Lin, more

Neuroradiology > 2015 > 57 > 2 > 163-169

Introduction The venous network of the brainstem is complex and significant. Susceptibility-weighted imaging (SWI) is a practical technique which is sensitive to veins, especially tiny veins. Our purpose of this study was to evaluate the visualization of the venous network of brainstem by using SWI at 3.0 T. Methods The occurrence rate of each superficial veins of brainstem was evaluated...

article

Visible images of the catalytic combustion of methanol in a micro-channel reactor

Chih-Hsing Leu, Shun-Chih King, Jia-Ming Huang, Cheng-Chun Chen, more

Chemical Engineering Journal > 2013 > 226 > Complete > 201-208

The supply of heat to endothermic reactions through combustion reactions is the most direct and effective strategy for facilitating such reactions. The catalytic combustion of methanol at room temperature can provide broader applications of technologies that involve heat demand for chemical reactions. Hydrogen production from methanol steam reforming is a practical example. In recent years, the miniaturization...

article

Low-level CO in hydrogen-rich gas supplied by a methanol processor for PEMFCs

Cheng-Chun Chen, Ming-Shan Jeng, Chih-Hsing Leu, Chang-Chung Yang, more

Chemical Engineering Science > 2011 > 66 > 21 > 5095-5106

The present study developed a low-CO methanol processor for the online supply of hydrogen to a proton exchange membrane fuel cell (PEMFC) composed of a steam reformer, a catalytic combustor and a reactor for the removal of CO. Commercial Cu/ZnO/Al ₂ O ₃ - and Pt/Al ₂ O ₃ -based catalysts were used in the methanol steam reforming and the preferential oxidation (PROX)...

article

Influence of CuO/ZnO/Al2O3 wash-coating slurries on the steam reforming reaction of methanol

Chih-Hsing Leu, Cheng-Chun Chen, Shun-Chih King, Jia-Ming Huang, more

International Journal of Hydrogen Energy > 2011 > 36 > 19 > 12231- 12237

A micro-channel reactor for methanol steam reforming is a candidate to supply hydrogen on-site to fuel cells. Micro-channel beds wash-coated with poor quality slurry formulations lead to poorer performance than packed beds using pellet catalysts. This study explored the morphology, X-ray Diffraction (XRD) spectrum, BET surface area and activity of wash-coating catalyst layers from a series of catalyst...

article

Sectional anatomy of the fetal brain in uterus at term on the sagittal plane

Fan-Zhen Kong, Fei Huang, Qing Xu, Zhen-Ping Li, more

Taiwanese Journal of Obstetrics & Gynecology > 2011 > 50 > 2 > 172-178

To provide sectional anatomic data for the precise localization of developmental malformation of fetal brain in sagittal magnetic resonance imaging (MRI).After abdominal and pelvic MRI scanning, the gravid specimen was cut into serial sagittal slices in correspondence with MRI in a low temperature laboratory to demonstrate the structures of fetal brain.(1) Directional determination of the sloping...

article

Investigation of the packed bed and the micro-channel bed for methanol catalytic combustion over Pt/A12O3 catalysts

Chih-Hsing Leu, Shun-Chih King, Cheng-Chun Chen, Jia-Ming Huang, more

Applied Catalysis A, General > 2010 > 382 > 1 > 43-48

On site hydrogen production from methanol steam reforming is an attractive topic for fuel cells. Methanol steam reforming is an endothermic reaction in which the heat can be supplied from methanol catalytic combustion. This study designed similar experimental conditions to compare the differences between the packed bed and the micro-channel bed for methanol catalytic combustion over Pt/Al ₂ ...

article

Sectional Anatomy of the Optic Pathways on the Coronal Plane

Cheng-Chun Chen, Fei Huang, Hua-Xin Shao, Jian-Hua Jin, more

Journal of the Chinese Medical Association > 2009 > 72 > 10 > 515-520

The purpose of this study was to provide practical data for the imaging diagnosis of the optic pathways. Sectional anatomy of the optic pathways on the coronal plane was investigated on 15 sets of serial coronal sections of the head of Chinese adult cadavers and 6 sets of serial coronal magnetic resonance imaging of normal adults. On the coronal plane, we recognized the special structures of...

chapter

Design and implementation of spiral-type Marchand Balun using glass-based IPD technology

Chien-Hsiang Huang, Tzu-Chiang Wei, Tzyy-Sheng Horng, Sung-Mao Wu, more

2008 Asia-Pacific Microwave Conference > 1 - 4

2008 Asia Pacific Microwave Conference

In this paper, a spiral-type Marchand balun design in glass-based IPD technology has been presented. The EM simulation results show good agreement with measurements. The balun in this design has excellent return and insertion loss characteristics. In addition, it is also with good amplitude and phase balance and can achieve high CMRR performance. This balun design has been successfully employed in...

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INFONA - science communication portal

Search results for: Cheng-Chun Chen

Brønsted Acid‐Promoted Benzannulation of o‐Alkynylbenzaldehyde and Alkyne, and the Positive Effect of Propargyl Alcohol

Enhanced surfactin production via the addition of layered double hydroxides

Susceptibility-weighted imaging of the venous networks around the brain stem

Visible images of the catalytic combustion of methanol in a micro-channel reactor

Low-level CO in hydrogen-rich gas supplied by a methanol processor for PEMFCs

Influence of CuO/ZnO/Al2O3 wash-coating slurries on the steam reforming reaction of methanol

Sectional anatomy of the fetal brain in uterus at term on the sagittal plane

Investigation of the packed bed and the micro-channel bed for methanol catalytic combustion over Pt/A12O3 catalysts

Sectional Anatomy of the Optic Pathways on the Coronal Plane

Design and implementation of spiral-type Marchand Balun using glass-based IPD technology

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