Browsing by Issue Date, starting with "2019-06-13"

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Asymmetries in Porous Membranes: Fabrication of Anodic Aluminum Oxide Membranes with Double-Sized Nanopores and Controlled Surface Properties
(2019-06-13)
Liu, Chih-Ting
;
Lin, Yu-Liang
;
Chu, Chien-Wei
;
Chang, Chun-Wei
;
Chiu, Yu-Jing
Recently, anodic aluminum oxide (AAO) membranes with ordered and monodispersed nanopores have attracted significant attention because the pore sizes and lengths of the AAO membranes can be systematically controlled by changing the anodization parameters. Asymmetries of geometry, wettability, charge, and polarity in nanoporous AAO membranes are now highly desired for applications such as drug delivery, membrane filtration, and catalysis. Although the asymmetries in AAO membranes have been widely studied, AAO membranes whose nanopores simultaneously possess more than two asymmetric properties still need to be developed. In this work, we present a simple method to fabricate asymmetric AAO membranes by combining the post-treatments with the three-step anodization method. The asymmetries of the AAO membranes simultaneously possessing larger nanopores with higher hydrophobicity and smaller nanopores with lower hydrophobicity are characterized by scanning electron microscopy, water contact angle measurements, and energy-dispersive X-ray spectroscopy. Using the asymmetric AAO membranes, nanowires of polystyrene and poly(styreneb/ock-dimethylsiloxane) with double-sized diameters are also fabricated via the melt and solvent wetting methods, exhibiting that the AAO membranes with double-sized diameters can be used as the templates for generating double-sized polymer nanowires.
Cardiac characteristics and natural progression in Taiwanese patients with mucopolysaccharidosis III
(2019-06-13)
Lin, Hsiang-Yu
;
Chen, Ming-Ren
;
Lin, Shan-Miao
;
Hung, Chung-Lieh
;
Niu, Dau-Ming
BackgroundMucopolysaccharidosis type III (MPS III), or Sanfilippo syndrome, is caused by a deficiency in one of the four enzymes involved in the lysosomal degradation of heparan sulfate. Cardiac abnormalities have been observed in patients with all types of MPS except MPS IX, however few studies have focused on cardiac alterations in patients with MPS III.MethodsWe reviewed medical records, echocardiograms, and electrocardiograms of 26 Taiwanese patients with MPS III (five with IIIA, 20 with IIIB, and one with IIIC; 14 males and 12 females; median age, 7.4years; age range, 1.8-26.5years). The relationships between age and each echocardiographic parameter were analyzed.ResultsEchocardiographic examinations (n=26) revealed that 10 patients (38%) had valvular heart disease. Four (15%) and eight (31%) patients had valvular stenosis or regurgitation, respectively. The most prevalent cardiac valve abnormality was mitral regurgitation (31%), followed by aortic regurgitation (19%). However, most of the cases of valvular heart disease were mild. Three (12%), five (19%) and five (19%) patients had mitral valve prolapse, a thickened interventricular septum, and asymmetric septal hypertrophy, respectively. The severity of aortic regurgitation and the existence of valvular heart disease, aortic valve abnormalities and valvular stenosis were all positively correlated with increasing age (p<0.05). Z scores >2 were identified in 0, 38, 8, and 27% of left ventricular mass index, interventricular septal end-diastolic dimension, left ventricular posterior wall end-diastolic dimension, and aortic diameter, respectively. Electrocardiograms in 11 patients revealed the presence of sinus arrhythmia (n=3), sinus bradycardia (n=2), and sinus tachycardia (n=1). Six patients with MPS IIIB had follow-up echocardiographic data at 1.9-18.1years to compare with the baseline data, which showed some patients had increased thickness of the interventricular septum, as well as more patients had valvular abnormalities at follow-up.ConclusionsCardiac involvement in MPS III is less common and milder compared with other types of MPS. The existence of valvular heart disease, aortic valve abnormalities and valvular stenosis in the patients worsened with increasing age, reinforcing the concept of the progressive nature of this disease.
Enhancing thermoelectric performance by Fermi level tuning and thermal conductivity degradation in (Ge1-xBix)Te crystals
(2019-06-13)
Wei, Pai-Chun
;
Cai, Cheng-Xun
;
Hsing, Cheng-Rong
;
Wei, Ching-Ming
;
Yu, Shih-Hsun
In this work, a high thermoelectric figure of merit, zT of 1.9 at 740 K is achieved in Ge1-xBixTe crystals through the concurrent of Seebeck coefficient enhancement and thermal conductivity reduction with Bi dopants. The substitution of Bi for Ge not only compensates the superfluous hole carriers in pristine GeTe but also shifts the Fermi level (E-F) to an eligible region. Experimentally, with moderate 6-10% Bi dopants, the carrier concentration is drastically decreased from 8.7 x 10(20) cm(-3) to 3-5 x 10(20) cm(-3) and the Seebeck coefficient is boosted three times to 75 mu VK-1. In the meantime, based on the density functional theory (DFT) calculation, the Fermi level E-F starts to intersect with the pudding mold band at L point, where the band effective mass is enhanced. The enhanced Seebeck coefficient effectively compensates the decrease of electrical conductivity and thus successfully maintain the power factor as large as or even superior than that of the pristine GeTe. In addition, the Bi doping significantly reduces both thermal conductivities of carriers and lattices to an extremely low limit of 1.57W m(-1)K(-1) at 740 K with 10% Bi dopants, which is an about 63% reduction as compared with that of pristine GeTe. The elevated figure of merit observed in Ge1-xBixTe specimens is therefore realized by synergistically optimizing the power factor and downgrading the thermal conductivity of alloying effect and lattice anharmonicity caused by Bi doping.
傑出校友連加恩勉勵學弟妹：台灣需要像海盜的人才
(國立陽明大學, 2019-06-14)
陽明電子報編輯小組
即將進入六月畢業季，在非洲行醫多年的連加恩校友，5月28日應陽明國際衛生學程邀請回到台灣。在對全校的演講中，他勉勵學生要當一...
【孟德爾之夢：遺傳的百年探索】展覽
(國立陽明大學, 2019-06-14)
陽明電子報編輯小組
【2019醫藥發展暨新知研討會】
(國立陽明大學, 2019-06-14)
陽明電子報編輯小組
【科創講堂 Tech-Talk FORUM 2019】智慧醫療
(國立陽明大學, 2019-06-14)
陽明電子報編輯小組
首度參加龍舟競賽，陽明一戰成名
(國立陽明大學, 2019-06-14)
陽明電子報編輯小組
陽明今年首度組隊參加「北投洲美龍舟競渡」，便締造出2分14秒73的佳績，在28支隊伍中名列第四。初次成軍就身手不凡，擊敗眾多隊伍...
Ex-situ soft X-ray absorption spectroscopic investigation of NiCo2O4 annealed in different gases for hydrogen generation by electrolysis of urea
(2019-06-14)
Chang, Han-Wei
;
Dong, Chung-Li
;
Lu, Ying-Rui
;
Huang, Yu-Cheng
;
Chen, Chi-Liang
Electrochemical and ex-situ X-ray absorption spectroscopic (XAS) measurements of NiCo2O4 that have been annealed in different gases (Ar and air) were made to evaluate the efficiency of its electrocatalysis of hydrogen generation by the electrolysis of urea. The electrochemical and XAS measurements demonstrated that NCO-Ar contain significant amounts of Co2+ in octahedral coordination was more favorable than NCO-air for urea electrolysis owing to the effective exposure of electrochemical active sites to participate in the Faradic redox reaction. Further insight into the electrocatalytic mechanism of NiCo2O4-based materials during urea electrolysis was obtained using ex-situ soft XAS. The results of ex-situ soft XAS revealed that the variation of the octahedral and tetrahedral coordinations of Co2+ in NCO-Ar and NCO-air importantly contributes to electrocatalytic behavior. NCO-Ar exhibits excellent electrocatalytic activity towards the Co redox couples in a repetitive cycling process owing to the creation of highly efficient active sites (octahedral Co2+). This study presents importantly x-ray spectroscopic determination of the change in electronic structure of catalyst for hydrogen production. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
《異星入境》（Arrival）
(國立陽明大學, 2019-06-14)
黃柏威
;
陽明電子報編輯小組
Ni and Pd N-confused porphyrin complexes as catalysts for the synthesis of cyclic carbonates from epoxides and CO2
(2019-06-14)
dela Cruz, Jay-ar B.
;
Ruamps, Mirko
;
Arco, Susan
;
Hung, Chen-Hsiung
;
應用化學系
We have demonstrated the design of a novel bifunctional catalyst that is based on an N-confused tetraphenylporphyrin (NCTPP) motif for the cycloaddition of an epoxide to carbon dioxide via cooperative activation of the epoxide through a Pd(II) or Ni(II) metal center and a peripheral benzoate moiety with percent conversions of up to 99% and TON = 7000.
【讀風──張曉風特展】
(國立陽明大學, 2019-06-14)
陽明電子報編輯小組
【解剖所專題演講】
(國立陽明大學, 2019-06-14)
陽明電子報編輯小組
【補充工作新動力】曾歲月幾何？馬祖列島的前世與今生
(國立陽明大學, 2019-06-14)
陽明電子報編輯小組
感恩有您，陽明餐會感謝「璞玉計畫」捐助者
(國立陽明大學, 2019-06-14)
陽明電子報編輯小組
為讓多元人才有機會接受生醫專業訓練，本校從2015年開辦璞玉組招生，至今共有38名弱勢學生透過這項招生管道進入陽明就讀。「璞玉...
GLORIA 亞東醫院輔導說明會，協助臨床研發創新與商品化
(國立陽明大學, 2019-06-14)
陽明電子報編輯小組
看準醫療機構所蘊涵的深厚臨床研發能量，科技部產學司委託陽明大學執行的國際產學聯盟計畫（GLORIA），於3月6日在亞東醫院舉辦補...
另一種光影──藍花楹文學獎與攝影獎雙料冠軍訪談
(國立陽明大學, 2019-06-14)
龔郁雯
;
陽明電子報編輯小組
藍花楹文學獎與攝影獎雙料冠軍訪談。
友華生技再捐120萬，助越南生至本校進修學習
(國立陽明大學, 2019-06-14)
陽明電子報編輯小組
本校生藥所積極辦理越南學生交流與招生，取得不錯成效，今年再獲友華生技醫藥股份有限公司捐助新台幣120萬元，資助越南學生來台交...
【生醫產業創新創業人才培育課程】
(國立陽明大學, 2019-06-14)
陽明電子報編輯小組
Exploring the formation of thermally detuned transverse patterns in a broad-area square VCSEL
(2019-06-15)
Tuan, P. H.
;
Yu, Y. T.
;
Huang, K. F.
;
Chen, Y. F.
;
電子物理學系
The formation of thermally detuned transverse patterns of a broad-area square-aperture vertical-cavity surface-emitting laser (VCSEL) via cryogenic cooling is explored. It is found that the transverse wave vector gradually rotates from the horizontal or vertical direction to the diagonal direction of the square boundary as the transverse mode order increases. A model based on the quantum billiards with a finite potential well is developed to emulate the transition behavior of lasing modes. Combining the effective modal gain analysis with the response wave function of driven finite potential billiards, all experimental lasing patterns under different operation temperatures are well recon- structed. (C) 2019 Optical Society of America