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Li, Shijun,Huang, Jianying,Cook, Timothy R.,Pollock, J. Bryant,Kim, Hyunuk,Chi, Ki-Whan,Stang, Peter J. American Chemical Society 2013 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.135 No.6
<P>We describe the formation of a suite of [3]catenanes via multicomponent coordination-driven self-assembly and host–guest complexation of a rectangular scaffold comprising a 90° Pt-based acceptor building block with a pseudorotaxane bis(pyridinium)ethane/dibenzo-24-crown-8 linear dipyridyl ligand and three dicarboxylate donors. The doubly threaded [3]catenanes are formed from a total of 10 molecular components from four unique species. Furthermore, the dynamic catenation process is reversible and can be switched off and on in a controllable manner by successive addition of KPF<SUB>6</SUB> and 18-crown-6, as monitored by <SUP>1</SUP>H and <SUP>31</SUP>P NMR spectroscopy.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/2013/jacsat.2013.135.issue-6/ja3118812/production/images/medium/ja-2012-118812_0008.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja3118812'>ACS Electronic Supporting Info</A></P>
Chi-Nan Hung,Hui-Pei Huang,Chau-Jong Wang,Kai-Li Liu,Chong-Kuei Lii 한국식품영양과학회 2014 Journal of medicinal food Vol.17 No.10
Endothelial dysfunction is an early indicator of cardiovascular diseases. Increased stimulation of tumor necrosis factor-a (TNF-a) triggers the inflammatory mediator secretion of endothelial cells, leading to atherosclerotic risk. In this study, we investigated whether sulforaphane (SFN) affected the expression of intracellular adhesion molecule-1 (ICAM-1) in TNF-a-induced ECV 304 endothelial cells. Our data showed that SFN attenuated TNF-a-induced expression of ICAM-1 in ECV 304 cells. Pretreatment of ECV 304 cells with SFN inhibited dose-dependently the secretion of proinflammatory cytokines, such as interleukin (IL)-1b, IL-6, and IL-8. SFN inhibited TNF-a-induced nuclear factor-jB (NF-jB) DNA binding activity. Furthermore, SFN decreased TNF-a-mediated phosphorylation of IjB kinase (IKK) and IjBa, Rho A, ROCK, ERK1/2, and plasminogen activator inhibitor-1 (PAI-1) levels. Collectively, SFN inhibited the NF-jB DNA binding activity and downregulated the TNF-a-mediated induction of ICAM-1 in endothelial cells by inhibiting the Rho A/ROCK/NF-jB signaling pathway, suggesting the beneficial effects of SFN on suppression of inflammation within the atherosclerotic lesion.
Li-Yun Lin,Chi-Yun Huang,Kuan-Chou Chen,Robert Y. Peng 한국원예학회 2021 Horticulture, Environment, and Biotechnology Vol.62 No.3
Grapefruit (G) parts contain abundant phenolic acids and fl avonoids (PPNs and FLVs). The wastes created from exocarps,mesocarps (G wastes, GW) and waste blanching water (WBW) lead to a considerable loss of PPNs and FLVs. Here, weassessed Buntan (CB), Buntan Hayata (CBH), and Peiyu (CP) cultivars and observed considerable amounts of PPNs andFLVs. The ethanolic extracts of GW (GWE) and WBW contained gallic acid, protocatechuic acid, chlorogenic acid, caff eicacid, ferulic acid, coumaric acid, naringin, hesperidin, diosmin, quercetin, hesperetin, nobiletin, and tangeretin (GWC). GWEhas previously been reported to be a relatively active antioxidant, anti-infl ammatory (based on the expression of TNF-αin Raw264.7 cells), antihypertensive, and anti-hyperglycemic compound. The IC 50 values for antihyperglycemic activitywith WBW for α-amylase were as follows: CB (27.96 ± 0.03 mg/mL) < CP (28.13 ± 0.19 mg/mL) < CBH (41.60 ± 0.16 mg/mL), and those for α-glucosidase were CB (1.80 ± 0.03 mg/mL) < CP (2.97 ± 0.29 mg/mL) < CBH (9.10 ± 0.51 mg/mL). GWC upregulated Glut4 in HepG2 cells, as well as the insulin secretion capability, and intracellular levels in RIN-m5Fcells, and it downregulated DPP4 in HepG2 cells. The IC 50 values for the angiotensin-converting enzyme activity were:CBP (5.10 ± 0.02 mg/mL) < CB (7.24 ± 0.65 mg/mL) < CP (8.60 ± 2.03 mg/mL). Our results indicate that PPNs and FLVspresent in GW are worth reclaiming.
Li-Hsiang Wang,Ming-Fen Tsai,Chin-Yen Stacey Han,Yi-Chi Huang,Hsueh-Erh Liu 한국간호과학회 2016 Asian Nursing Research Vol.10 No.3
Purpose: Urinary catheterization is a common technique in clinical practice. There is, however, no consensus on management prior to removal of the indwelling catheter for short-term patients. This systematic review examined the necessity of clamping before removal of an indwelling urinary catheter in short-term patients. Methods: A systematic literature review was conducted using eight databases and predetermined keywords-guided searches. Some 2,515 studies were evaluated. Ten studies that met the inclusion criteria were selected. Results: The quality of the studies was assessed using the Jadad scoring system. Only 40.0% of studies were rated as high quality. This review found that catheter clamping prior to removal was not necessary for the short-term patient. When made a comparison with the unclamping group, there was no significant difference in recatheterization risk, risk of urine retention, patients’ subjective perceptions and rate of urinary tract infection. Conclusions: This review indicated that bladder training by clamping prior to removal of urinary catheters is not necessary in short-term catheter patients. In addition, clamping carries the risk of complications such as prolonging urinary catheter retention and urinary tract injury. Further investigation requires higher quality methodologies and more diverse study designs.
Yu Huang,Houbin Li,Xiongzhi Zhang,Kaiqiao Fu,Chi Huang,Shiju Yuan 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.31 No.-
In the present study, a series of cationic spherical polyelectrolyte brushes (CSPB), consisting of a silicacore and a shell of copolymer of acrylamide (AM) and [2-(methacryloyloxy)ethyl] trimethylammoniumchloride (METAC), were synthesized. Then a dual-component system which was composed of CSPB andanionic polyacrylamide (APAM) was used to improve the retention and drainage properties of bleachedeucalyptus kraft pulp and precipitated calcium carbonate (PCC). Comparative researches about retentionand drainage properties between CSPB/APAM system and cationic starch/APAM system wereundertaken as well. Results showed that further improvement in first-pass retention (FPR) of pulp,FPR of PCC and drainage time could be achieved by CSPB/APAM system. It was also found that increase ofshear intensity led to a decrease in retention efficiency, while it had no significant influence on drainagetime of pulp. However, due to the symmetrical or quasi-symmetrical spherical brush structure, CSPB stillshowed better retention efficiency than cationic starch under different turbulent conditions. Furthermore, the flocculation mechanism of the CSPB/APAM dual-component system was proposedin the paper.
Yao-Chi Zeng,Gui-Ping Mu,Shu-Fen Huang,Xue-Hui Zeng,Hong Cheng,Zhong-Xin Li 한국영양학회 2014 Nutrition Research and Practice Vol.8 No.4
BACKGROUND/OBJECTIVES: The objectives of this study were to investigate the effects of lycopene on the migration, adhesion, tube formation capacity, and p38 mitogen-activated protein kinase (p38 MAPK) activity of endothelial progenitor cells (EPCs) cultivated with high glucose (HG) and as well as explore the mechanism behind the protective effects of lycopene on peripheral blood EPCs. MATERIALS/METHODS: Mononuclear cells were isolated from human peripheral blood by Ficoll density gradient centrifugation. EPCs were identified after induction of cellular differentiation. Third generation EPCs were incubated with HG (33 mmol/L) or 10, 30, and 50 μg/mL of lycopene plus HG. MTT assay and flow cytometry were performed to assess proliferation and apoptosis of EPCs. EPC migration was assessed by MTT assay with a modified boyden chamber. Adhesion assay was performed by replating EPCs on fibronectin-coated dishes, after which adherent cells were counted. In vitro vasculogenesis activity was assayed by Madrigal network formation assay. Western blotting was performed to analyze protein expression of both phosphorylated and non-phosphorylated p38 MAPK. RESULTS: The proliferation, migration, adhesion, and in vitro vasculogenesis capacity of EPCs treated with 10, 30, and 50 μg/mL of lycopene plus HG were all significantly higher comapred to the HG group (P < 0.05). Rates of apoptosis were also significantly lower than that of the HG group. Moreover, lycopene blocked phosphorylation of p38 MAPK in EPCs (P < 0.05). To confirm the causal relationship between MAPK inhibition and the protective effects of lycopene against HG-induced cellular injury, we treated cells with SB203580, a phosphorylation inhibitor. The inhibitor significantly inhibited HG-induced EPC injury. CONCLUSIONS: Lycopene promotes proliferation, migration, adhesion, and in vitro vasculogenesis capacity as well as reduces apoptosis of EPCs. Further, the underlying molecular mechanism of the protective effects of lycopene against HG-induced EPC injury may involve the p38 MAPK signal transduction pathway. Specifically, lycopene was shown to inhibit HG-induced EPC injury by inhibiting p38 MAPKs.
Integrated Calibration for the Cross Magnetic Gradiometer
Cheng Chi,Jun-Wei Lv,Dan Wang,Zhen-Tao Yu,Jing-Li Huang 한국자기학회 2017 Journal of Magnetics Vol.22 No.3
The magnetic gradiometer onboard a maneuverable vehicle is subjected to not only magnetometer errors and misalignment errors but also magnetic interference of vehicle. Measurement precision of the magnetic gradiometer is greatly affected by those errors, so an integrated error calibration method is proposed in this paper. Firstly, considering vector magnetometer errors and magnetic interference, an integrated error calibration model for vector magnetometer is established, and ellipsoid fitting parameters are calculated by the least square algorithm under ellipsoid restriction, then the error calibration matrices are solved by the Cholesky factorization. Secondly, the misalignment error calibration matrices are obtained by solving the Orthogonal Procrustes problem. Finally, simulations and experiments with a cross magnetic gradiometer are performed to verify effectiveness and robustness of the proposed method. Results show that the proposed method can effectively calibrate the cross magnetic gradiometer, and measurement accuracy of the cross magnetic gradiometer is increased greatly.
Liang, Chi-Te,Lin, Li-Hung,Kuang Yoa, Chen,Lo, Shun-Tsung,Wang, Yi-Ting,Lou, Dong-Sheng,Kim, Gil-Ho,Yuan-Huei, Chang,Ochiai, Yuichi,Aoki, Nobuyuki,Chen, Jeng-Chung,Lin, Yiping,Chun-Feng, Huang,Lin, Sh Springer 2011 Nanoscale research letters Vol.6 No.1
<P>A direct insulator-quantum Hall (I-QH) transition corresponds to a crossover/transition from the insulating regime to a high Landau level filling factor ν > 2 QH state. Such a transition has been attracting a great deal of both experimental and theoretical interests. In this study, we present three different two-dimensional electron systems (2DESs) which are in the vicinity of nanoscaled scatterers. All these three devices exhibit a direct I-QH transition, and the transport properties under different nanaoscaled scatterers are discussed.</P>