Application of rare earth as mordant for the dyeing of ramie fabrics with natural dyes

Guang Hong Zheng,Hong Bin Fu,Guang Ping Liu 한국화학공학회 2011 Korean Journal of Chemical Engineering Vol.28 No.11

Selecting appropriate metallic compounds as mordants is essential for dyeing with natural dyes. This paper presents the application of rare earth compounds as mordant for the dyeing of ramie fabrics with four kinds of natural dyes. The influences of pre-mordanting, simultaneous mordanting, and post-mordanting on the dyeing effect were explored. The post-mordanting was proved to give rise to the highest dye uptake. The effects of dyeing conditions including dyeing temperature and time, dyeing bath pH and the concentration of rare earth on the dye uptake were investigated systematically. The fabrics dyed with natural dyes in presence of rare earth as mordant exhibited high color shade stability in the baths with pH varying from being acidic to neutral and alkaline. Employing rare earth as mordant apparently raised the color fastness to washing, rubbing and light of the ramie fabrics dyed with the natural extracts. In comparison with the commonly used metallic salts, using rare earth chlorides as mordants can greatly reduce the ionic concentration employed in natural dyeing. This study proved that rare earth would be a kind or promising environmentally friendly mordant in natural dyeing.

Anticancer effects of KI-10F: A novel compound affecting apoptosis, angiogenesis and cell growth in colon cancer

HONG, SANG-WON,JUNG, KYUNG HEE,CHOI, MYUNG-JOO,KIM, DA YOUNG,LEE, HEE-SEUNG,ZHENG, HONG-MEI,LI, GUANG YONG,EL-DEEB, IBRAHIM M.,PARK, BYUNG SUN,LEE, SO HA,HONG, SOON-SUN Spandidos Publications 2012 International journal of oncology Vol.41 No.5

<P>The anticancer effect of a new pyrazole derivative, KI-10F (2-(4-(2-(4-(dimethylamino) phenyl)pyridin-4-yl)-5-(3-methoxy-5-methylphenyl)-1H-pyrazol?1-yl) acetonitrile)?3.5HCl) was evaluated in human colon cancer cells. KI-10F strongly suppressed the growth of human colon cancer cells and induced apoptosis by increasing the proportion of sub-G1 presenting apoptotic cells as well as causing cell cycle arrest at the G2/M phase. Apoptosis by KI-10F was confirmed by observation of an increase in the expression of cleaved caspase-3, caspase-8, caspase-9 and Bax, and the decrease of Bcl-2. Decreased expression of HIF-1α and VEGF, and the inhibition of HUVEC tube formation and migration showed that KI-10F effectively inhibited the angiogenesis process. Furthermore, in?vivo study in a mouse xenograft model showed that KI-10F produced a stronger antitumor activity than 5-FU, a conventional anticancer drug prescribed for the treatment of colon cancer. The effects of KI-10F on tumor proliferation (PCNA), angiogenesis (CD34) and apoptosis (cleaved caspase-3) were evaluated by immunohistochemistry using isolated tumor tissue samples. Taken together, our results demonstrated that KI-10F induces apoptosis and inhibits cell growth and angiogenesis both in?vitro and in?vivo. We suggest that KI-10F is an effective chemotherapeutic candidate for use against colon cancer.</P>

The Correlation between the Injury Patterns of the Medial Patellofemoral Ligament in an Acute First-Time Lateral Patellar Dislocation on MR Imaging and the Incidence of a Second-Time Lateral Patellar Dislocation

Guang-ying Zhang,Hong-xia Zhu,En-miao Li,Hao Shi,Wei Liu,Lei Zheng,Zheng-wu Bai,Hong-yu Ding 대한영상의학회 2018 Korean Journal of Radiology Vol.19 No.2

Objective: To evaluate the correlation between the injury patterns of the medial patellofemoral ligament (MPFL) on magnetic resonance imaging in an acute first-time lateral patellar dislocation (LPD) and incidence of a second-time LPD. Materials and Methods: Magnetic resonance images were prospectively analyzed in 147 patients after an acute first-time LPD with identical nonoperative management. The injury patterns of MPFL in acute first-time LPDs were grouped by location and severity for the analysis of the incidence of second-time LPD in a 5-year follow-up. Independent t tests, chi-square tests and Kruskal-Wallis tests were performed as appropriate. Results: Forty-six cases (46/147, 31.3%) of second-time LPD were present at the 5-year follow-up. Fourteen (14/62, 22.6%) and 31 cases (31/80, 38.8%) were present in the partial and complete MPFL tear subgroups, respectively. Twenty-five cases (25/65, 38.5%), 11 cases (11/26, 42.3%), and 8 cases (8/47, 17%) were present in the isolated femoral-side MPFL tear (FEM), combined MPFL tear (COM), and isolated patellar-side MPFL tear (PAT) subgroups, respectively. Compared with the partial MPFL tears, complete tears showed higher incidence of a second-time LPD (p = 0.04). The time interval between the two LPDs was shorter in the complete MPFL tear subgroup (24.2 months) than in the partial tear subgroup (36.9 months, p = 0.001). Compared with the PAT subgroup, the FEM and COM subgroups showed a higher incidence of a second-time LPD (p = 0.025). The time intervals between the two LPDs were shorter in the FEM and COM subgroups (20.8 months and 19.2 months) than in the PAT subgroup (32.5 months, p = 0.049). Conclusion: A complete MPFL tear, isolated femoral-side tear and combined tear in a first-time LPD predispose a second-time LPD.

Facile Fabrication of WO₃ Nanoplates Thin Films with Dominant Crystal Facet of (002) for Water Splitting

Zheng, Jin You,Song, Guang,Hong, Jisang,Van, Thanh Khue,Pawar, Amol Uttam,Kim, Do Yoon,Kim, Chang Woo,Haider, Zeeshan,Kang, Young Soo American Chemical Society 2014 Crystal Growth & Design Vol.14 No.11

<P>Single crystalline orthorhombic phase tungsten trioxide monohydrate (<I>O</I>-WO<SUB>3</SUB>·H<SUB>2</SUB>O, space group: <I>Pmnb</I>) nanoplates with a clear morphology and uniform size distribution have been synthesized by the hydrothermal method and fabricated on the surface of fluorine doped tin oxide (FTO) coated glass substrates with selective exposure of the crystal facet by the finger rubbing method. The rubbing method can easily arrange the <I>O</I>-WO<SUB>3</SUB>·H<SUB>2</SUB>O nanoplates along the (020) facet on the FTO substrate. The <I>O</I>-WO<SUB>3</SUB>·H<SUB>2</SUB>O nanoplate can be converted to monoclinic phase WO<SUB>3</SUB> (γ-WO<SUB>3</SUB>, space group: <I>P</I>21/<I>n</I>) with dominant crystal facet of (002) without destroying the plate structure. Crystal morphologies, structures, and components of the powders and films have been determined by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Raman, X-ray photoelectron spectroscopy, etc. The band gap energies of the <I>O</I>-WO<SUB>3</SUB>·H<SUB>2</SUB>O and γ-WO<SUB>3</SUB> nanoplates were determined as ca. 2.26 and 2.49 eV, respectively. Photoelectrochemical properties of the films with (002) dominant crystal facet have also been checked for discussion of further application in water oxidation. The advantage of (002) facet dominant film was investigated by comparing to one spin-coated γ-WO<SUB>3</SUB> thin film with the same thickness via photoelectrochemical characterizations such as photocurrent, incident photon to current efficiency, and electrochemical impedance spectroscopy.</P><P>Single crystalline orthorhombic phase <I>O</I>-WO<SUB>3</SUB>·H<SUB>2</SUB>O nanoplates with clear morphology and uniform size distribution have been synthesized by the hydrothermal method and fabricated as (020)-oriented film by the finger rubbing method. The (020)-oriented <I>O</I>-WO<SUB>3</SUB>·H<SUB>2</SUB>O film can be converted to monoclinic phase (002)-oriented γ-WO<SUB>3</SUB> film by calcination. Photoelectrochemical properties have been examined for further application in solar water oxidation.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/cgdefu/2014/cgdefu.2014.14.issue-11/cg5012154/production/images/medium/cg-2014-012154_0016.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/cg5012154'>ACS Electronic Supporting Info</A></P>

Isolation, Purification, and Characterization of a Thermostable Xylanase from a Novel Strain, Paenibacillus campinasensis G1-1

( Hong Chen Zheng ),( Yi Han Liu ),( Xiao Guang Liu ),( Jian Ling Wang ),( Ying Han ),( Fu Ping Lu ) 한국미생물 · 생명공학회 2012 Journal of microbiology and biotechnology Vol.22 No.7

High levels of xylanase activity (143.98 IU/ml) produced by the newly isolated Paenibacillus campinasensis G1-1 were detected when it was cultivated in a synthetic medium. A thermostable xylanase, designated XynG1-1, from P. campinasensis G1-1 was purified to homogeneity by Octyl-Sepharose hydrophobic-interaction chromatography, Sephadex G75 gel-filter chromatography, and Q-Sepharose ion-exchange chromatography, consecutively. By multistep purification, the specific activity of XynG1-1 was up to 1,865.5 IU/mg with a 9.1-fold purification. The molecular mass of purified XynG1-1 was about 41.3 kDa as estimated by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE). Sequence analysis revealed that XynG1-1 containing 377 amino acids encoded by 1,134 bp genomic sequences of P. campinasensis G1-1 shared 96% homology with XylX from Paenibacillus campinasensis BL11 and 77%~78% homology with xylanases from Bacillus sp. YA- 335 and Bacillus sp. 41M-1, respectively. The activity of XynG1-1 was stimulated by Ca2+, Ba2+, DTT, and β- mercaptoethanol, but was inhibited by Ni2+, Fe2+, Fe3+, Zn2+, SDS, and EDTA. The purified XynG1-1 displayed a greater affinity for birchwood xylan, with an optimal temperature of 60oC and an optimal pH of 7.5. The fact that XynG1-1 is cellulose-free, thermostable (stability at high temperature of 70oC~80oC), and active over a wide pH range (pH 5.0~9.0) suggests that the enzyme is potentially valuable for various industrial applications, especially for pulp bleaching pretreatment.

Developments of Mg warm forming technologies

Shi-Hong Zhang,Guang-Sheng Song,Li Zheng 한국소성가공학회 2012 마그네슘 심포지엄 Vol.2012 No.11

Adaptive Synchronization of Master-Slave Large-Scale Systems against Bias Actuators and Network Attenuations

Xiao-Zheng Jin,Guang-Hong Yang,Wei-Wei Che 제어·로봇·시스템학회 2012 International Journal of Control, Automation, and Vol.10 No.6

This paper utilizes the adaptive technique to design a class of active synchronizing master-slave large scale systems against imperfect actuators and networked interconnections with bias faults and signal attenuations, respectively. Without the requirement of knowledge of eventual faulty factors of bias-actuators on systems, and attenuation factors of connected networks, an adaptive mechanism is de-signed to estimate each unknown faulty factor on-line for constructing a class of distributed adaptive controllers. Then based on the adaptive adjustment parameters and Lyapunov stability theory, Lyapunov functions are addressed to prove that the proposed adaptive master-slave large-scale system can be guaranteed to be asymptotic synchronization with the improper actuator and faulty transmitted signals. Finally, a multiple vehicle large-scale system is used to verify the efficiency of the method.

Graphene–Ferroelectric Hybrid Structure for Flexible Transparent Electrodes

Ni, Guang-Xin,Zheng, Yi,Bae, Sukang,Tan, Chin Yaw,Kahya, Orhan,Wu, Jing,Hong, Byung Hee,Yao, Kui,Ö,zyilmaz, Barbaros American Chemical Society 2012 ACS NANO Vol.6 No.5

<P>Graphene has exceptional optical, mechanical, and electrical properties, making it an emerging material for novel optoelectronics, photonics, and flexible transparent electrode applications. However, the relatively high sheet resistance of graphene is a major constraint for many of these applications. Here we propose a new approach to achieve low sheet resistance in large-scale CVD monolayer graphene using nonvolatile ferroelectric polymer gating. In this hybrid structure, large-scale graphene is heavily doped up to 3 × 10<SUP>13</SUP> cm<SUP>–2</SUP> by nonvolatile ferroelectric dipoles, yielding a low sheet resistance of 120 Ω/□ at ambient conditions. The graphene–ferroelectric transparent conductors (GFeTCs) exhibit more than 95% transmittance from the visible to the near-infrared range owing to the highly transparent nature of the ferroelectric polymer. Together with its excellent mechanical flexibility, chemical inertness, and the simple fabrication process of ferroelectric polymers, the proposed GFeTCs represent a new route toward large-scale graphene-based transparent electrodes and optoelectronics.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancac3/2012/ancac3.2012.6.issue-5/nn3010137/production/images/medium/nn-2012-010137_0008.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn3010137'>ACS Electronic Supporting Info</A></P>

Quasi-Periodic Nanoripples in Graphene Grown by Chemical Vapor Deposition and Its Impact on Charge Transport

Ni, Guang-Xin,Zheng, Yi,Bae, Sukang,Kim, Hye Ri,Pachoud, Alexandre,Kim, Young Soo,Tan, Chang-Ling,Im, Danho,Ahn, Jong-Hyun,Hong, Byung Hee,Ö,zyilmaz, Barbaros American Chemical Society 2012 ACS NANO Vol.6 No.2

<P>The technical breakthrough in synthesizing graphene by chemical vapor deposition methods (CVD) has opened up enormous opportunities for large-scale device applications. To improve the electrical properties of CVD graphene grown on copper (Cu-CVD graphene), recent efforts have focused on increasing the grain size of such polycrystalline graphene films to 100 μm and larger. While an increase in grain size and, hence, a decrease of grain boundary density is expected to greatly enhance the device performance, here we show that the charge mobility and sheet resistance of Cu-CVD graphene is already limited within a single grain. We find that the current high-temperature growth and wet transfer methods of CVD graphene result in quasi-periodic nanoripple arrays (NRAs). Electron-flexural phonon scattering in such partially suspended graphene devices introduces anisotropic charge transport and sets limits to both the highest possible charge mobility and lowest possible sheet resistance values. Our findings provide guidance for further improving the CVD graphene growth and transfer process.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancac3/2012/ancac3.2012.6.issue-2/nn203775x/production/images/medium/nn-2011-03775x_0005.eps'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn203775x'>ACS Electronic Supporting Info</A></P>

Distributed Adaptive Robust Tracking and Model Matching Control with Actuator Faults and Interconnection Failures

Xiao-Zheng Jin,Guang-Hong Yang 제어·로봇·시스템학회 2009 International Journal of Control, Automation, and Vol.7 No.5

: In this paper, direct adaptive-state feedback control schemes are developed to solve the robust tracking and model matching control problem for a class of distributed large scale systems with actuator faults, faulty and perturbed interconnection links, and external disturbances. The adaptation laws are proposed to update the controller parameters on-line when all the eventual faults, the upper bounds of perturbations and disturbances are assumed to be unknown. Then a class of distributed state feedback controllers is constructed to automatically compensate the fault, perturbation and disturbance effects based on the information from adaptive schemes. The proposed distributed adaptive tracking controller can ensure that the resulting adaptive closed-loop large-scale system is stable and the tracking error decreases asymptotically to zero in the presence of uncertain faults of actuators and interconnections, perturbations in interconnection channels, and disturbances. The proposed adaptive design technique is finally evaluated in the light of a simulation example.