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Lai, Yi An,Lai, I Hsiang,Tseng, Chi Feng,Lee, James,Mao, Simon J.T. Korean Society for Biochemistry and Molecular Biol 2007 Journal of biochemistry and molecular biology Vol.40 No.6
Human plasma Hp is classified as 1-1, 2-1, and 2-2. They are inherited from two alleles Hp 1 and Hp 2, but there is only Hp 1 in almost all the animal species. Hp 2-2 molecule is extremely large and heterogeneous associated with the development of inflammatory-related diseases. In this study, we expressed entire bovine Hp in E. coli as a $\alpha\beta$ linear form. Interestingly, the antibodies prepared against this form could recognize the subunit of native Hp. In stead of a complicated column method, the antibody was able to isolate bovine Hp via immunoaffinity and gelfiltration columns. The isolated Hp is polymeric containing two major molecular forms (660 and 730 kDa). Their size and hemoglobin binding complex are significantly larger than that of human Hp 2-2. The amino-acid sequence deducted from the nucleotide sequence is similar to human Hp 2 containing a tandem repeat over the $\alpha$ chain. Thus, the Hp 2 allele is not unique in human. We also found that there is one additional -SH group (Cys-97) in bovine $\alpha$ chain with a total of 8 -SH groups, which may be responsible for the overall polymeric structure that is markedly different from human Hp 2-2. The significance of the finding and its relationship to structural evolution are also discussed.
Particle Size and Loading Effects on Particle-Laden Flow with Mono-sized Droplets
( Wei Hsiang Lai ),( Wei Fu Lu ),( Keh Chin Chang ) 한국액체미립화학회 2010 한국액체미립화학회 학술강연회 논문집 Vol.2010 No.-
Turbulence modulation is an interaction between phases that occurs in multiphase flow, and turbulence intensity traditionally can be represented as an indicator of turbulence modulation. Many researchers paid attention on the subject, but no coincident conclusion can be proposed. A general cognition is that larger particles induced wake to enhance the fluid turbulence intensity and smaller particles suppressed the fluid turbulence intensity since the fluid eddy imparted energy to the smaller particle. Here, the authors orderly changed particle size of dispersed phase and mass loading ratio (LR) to study the change on fluid turbulence intensity. Mono-dispersed droplets with a narrow size distribution were used to load into a homogeneous turbulence to investigate the turbulence modulation. Particle Dynamic Analyzer (PDA) was used to measure the particle (droplets and tracers) dynamic information. The particle concentration effect can be significantly observed. After coupling particle concentration and particle wetting area (πd2), a linear relationship can be obtained and it represents the turbulence modulation dominated the dilute two-phase flow as our expectation.
Ethanol and Water Atomization of Like- and Unlike-Doublet Impinging Jets
( Wei Hsiang Lai ),( Shun Jie Yang ),( Wen Non Huang ) 한국액체미립화학회 2005 한국액체미립화학회 학술강연회 논문집 Vol.2005 No.-
The objective of the present study is to further investigate the general influence of the physical properties and environment effects on the mean drop size generated by like- and unlike-doublet impinging jets with 95% ethanol and purified water. The orifice of the injector element are 0.3, 0.5, and 0.7 mm in diameter, with depth-to-diameter ratio of 10, the impinging angle is set to be 60°, 90° and 120° respectively. In order to measure the mean drop size, the jet velocity is varied from 2 m/s to 30 m/s, the environment pressure is designated as 1, 2, 5 and 9 bar. Results show that in liquid shape mode, the larger impinging angle, the lower jet velocity threshold of mode transition is observed. Regarding the liquid film size, an empirical equation can be used to calculate the ψ angle, and the equation induced by Ibrahim et al.(1991) can figure out the film length by multiply a constant, which is related to the viscosity. The SMD of unlike-doublet impinging is highly influenced by the surface tension. High ambient pressure has no effect on film size, but it causes the liquid shape change mode in lower jet velocity.
Interleukin-20 targets podocytes and is upregulated in experimental murine diabetic nephropathy
Yu-Hsiang Hsu,Hsing-Hui Li,Junne-Ming Sung,Wei-Yu Chen,Ya-Chin Hou,Yun-Han Weng,Wei-Ting Lai,Chih-Hsing Wu,Ming-Shi Chang 생화학분자생물학회 2017 Experimental and molecular medicine Vol.49 No.-
Interleukin (IL)-20, a proinflammatory cytokine of the IL-10 family, is involved in acute and chronic renal failure. The aim of this study was to elucidate the role of IL-20 during diabetic nephropathy development. We found that IL-20 and its receptor IL-20R1 were upregulated in the kidneys of mice and rats with STZ-induced diabetes. In vitro, IL-20 induced MMP-9, MCP-1, TGF-β1 and VEGF expression in podocytes. IL-20 was upregulated by hydrogen peroxide, high-dose glucose and TGF-β1. In addition, IL-20 induced apoptosis in podocytes by activating caspase-8. In STZ-induced early diabetic nephropathy, IL-20R1-deficient mice had lower blood glucose and serum BUN levels and a smaller glomerular area than did wild-type controls. Anti-IL-20 monoclonal antibody (7E) treatment reduced blood glucose and the glomerular area and improved renal functions in mice in the early stage of STZ-induced diabetic nephropathy. ELISA showed that the serum IL-20 level was higher in patients with diabetes mellitus than in healthy controls. The findings of this study suggest that IL-20 induces cell apoptosis of podocytes and plays a role in the pathogenesis of early diabetic nephropathy.
Antioxidative and Hepatoprotective Effects of Magnolol on Acetaminophen-induced Liver Damage in Rats
Yung-Hsiang Chen,Feng-Yen Lin,Po-Len Liu,Yi-Tsau Huang,Jen-Hwey Chiu,Yi-Chun Chang,Kee-Ming Man,Chuang-Ye Hong,Yen-Yi Ho,Ming-Tsung Lai 대한약학회 2009 Archives of Pharmacal Research Vol.32 No.2
Acute liver failure (ALF), an often fatal condition characterized by massive hepatocyte necrosis, is frequently caused by drug poisoning, particularly with acetaminophen (N-acetyl-p-aminophenol/APAP). Hepatocyte necrosis is consecutive to glutathione (GSH) depletion and mitochondrial damage caused by reactive oxygen species (ROS) overproduction. Magnolol, one major phenolic constituent of Magnolia officinalis, have been known to exhibit potent antioxidative activity. In this study, the anti-hepatotoxic activity of magnolol on APAP-induced toxicity in the Sprague-Dawley rat liver was examined. After evaluating the changes of several biochemical parameters in serum, the levels of aspartate aminotransferase (AST), alanine aminotransferase (ALT), and lactate dehydrogenase (LDH) were elevated by APAP (500 mg/kg) intraperitoneal administration (8 and 24 h) and reduced by treatment with magnolol (0.5 h after APAP administration; 0.01, 0.1, and 1 μg/kg). Histological changes around the hepatic central vein, lipid peroxidation (thiobarbituric acid-reactive substance/TBARS), and GSH depletion in liver tissue induced by APAP were also recovered by magnolol treatment. The data show that oxidative stress followed by lipid peroxidation may play a very important role in the pathogenesis of APAP-induced hepatic injury; treatment with lipid-soluble antioxidant, magnolol, exerts anti-hepatotoxic activity. Our study points out the potential interest of magnolol in the treatment of toxic ALF.
Video Streaming over HTTP/2: Design and Evaluation of Adaptive Server-Paced Push
Huei-Wen Ferng,Shan-Hsiang Shen,Chih-Wei Lai 한국통신학회 2021 Journal of communications and networks Vol.23 No.2
By using the server push of the hypertext transfer pro tocol (HTTP) version 2.0, i.e., HTTP/2, along with the techniqueof server pacing, a novel scheme is proposed in this paper to de liver video segments. Furthermore, the load of bitrate adaptationis shifted to the server to avoid bandwidth competition and wastagecaused by bitrate switching. It can be explicitly shown that no sig nificant overhead is brought by our proposed scheme via complex ity analysis. Moreover, our proposed scheme generates one HTTPrequest only. With extensive simulations, we successfully demon strate that it is superior over the closely related schemes in termsof the average achievable bitrate, the number of buffer stalls, theratio of unclaimed pushes, etc., in particular, when a harsh networkcondition arises.
Yi-Hsuan Chen,Yi-Hsiang Lai,Ping-Heng Wu,Li-Syuan Chen,Yung-Sen Lin,Chih-Ming Chen 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.83 No.-
Surface metallization of polymer substrate andfilm adhesion are crucial to the development offlexibleelectronics. This study demonstrates the co-silanization engineering on the polyimide (PI)film by mutualintercropping of two organosilane molecules to improve their grafting orientability and enhance theadsorbability toward the PI substrate and loaded metal atoms. The mutual intercropping-inspired cosilanizationengineering is implemented by using 3-[(trimethylsilyl)ethynyl]pyridine (TEP) as asupporting organosilane to spatially confine the grafting orientation of the supported aminosilane, 3-[2-(2-aminoethylamino)ethylamino]propyl-trimethoxysilane (ETAS), leading to the formation of a wellorientedorganosilane composite nanolayer as adhesion promotion layer forflexible conductors. Theflexible Cu conductor electrolessly deposited on the PIfilm by co-silanization shows improved adhesionstrength (0.9 kgf/cm) compared to those based on mono-silanization (0.51 kgf/cm) and sputtered Ta/Cu(0.4 kgf/cm). Superior deformability (bendability) was also achieved for the co-silanized Cu/PI sample byretaining good electrical property after bending cycle up to 1000.