Synthesis of acetic acid-[(hydrazinylthioxomethyl)thio]-sodium and its application on the flotation separation of molybdenite from galena

Zhigang Yin,Wei Sun,Yuehua Hu,Runqing Liu,Wei Jiang,Chenhu Zhang,Qingjun Guan,Chenyang Zhang 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.52 No.-

A novel organic compound acetic acid-[(hydrazinylthioxomethyl)thio]-sodium was synthesized andcharacterized. Theflotation performance and adsorption mechanism of AHS to galena were investigatedby micro, benchflotation tests, UV spectra, zeta potential, FTIR and XPS measurements. The resultsdemonstrated that AHS exhibited superior depressing power to galena and could be used as selectivedepressant forflotation separation of molybdenite from galena. The results of UV spectra, FTIR, zetapotential and XPS measurements demonstrated that AHS chemisorb on galena surface by formingfivememberedcheat ring with releasing of H ions. Therefore, the possible adsorption mode of AHS on galenasurface was recommended.

Characteristics of Velocity Ambiguity for CINRAD-SA Doppler Weather Radars

Zhigang Chu,Yan Yin,Songshan Gu 한국기상학회 2014 Asia-Pacific Journal of Atmospheric Sciences Vol.50 No.2

The velocity ambiguity in Doppler weather radars hasinhibited the application of wind field data for long time. One effectivesolution is software-based velocity dealiasing algorithm. In thispaper, in order to better design, optimize and validate velocitydealiasing algorithms for CINRAD-SA, data from operational radarswere used to statistically characterize velocity ambiguity. The analyzedcharacteristic parameters included occurrence rate, and inter-station,inter-type, temporal, and spatial distributions. The results show that14.9% of cloud-rain files and 0.3% of clear-air files from CINRADSAradars are ambiguous. It is also found that echoes of weakconvections have the highest occurrence rate of velocity ambiguitythan any other cloud types, and the probability of ambiguity is higherin winter than in summer. A detailed inspection of the occurrence ofambiguity in various cases indicates that ambiguous points usuallyoccur in areas with an elevation angle of 6.0o, an azimuth of 70o or250o, radial distance of 50-60 km, and height of 5-6 km, and that99.4% of ambiguous points are in the 1st-folding interval. Suggestionsfor performing dealiasing at different locations and different timepoints are provided.

Factors controlling the geochemical differences between two types of rhyolites in the middle Okinawa Trough

Yuxiang Zhang,Zhigang Zeng,Xiaoyuan Wang,Shuai Chen,Xuebo Yin 한국지질과학협의회 2020 Geosciences Journal Vol.24 No.1

The origin of the felsic volcanic rocks in the Okinawa Trough (OT) remains uncertain. In the middle Okinawa Trough (MOT), two types of rhyolites (type 1 and type 2 rhyolites) have been recognized. Research on the diverse volcanic rocks should be prioritized to determine the magmatic origins of these rocks. Consequently, in this article, the geochemical differences and controlling factors for these two types of MOT rhyolites are systematically discussed. Type 2 rhyolites have higher Dy/Yb and Nb/Ta ratios than type 1 rhyolites, implying that the former might be influenced by a greater contribution of amphibole. Quantitative models suggest that type 1 rhyolites could have formed via the remelting of andesites when amphiboles remain in the source, whereas type 2 rhyolites could have formed without residual amphiboles. These two distinct melting models effectively explain most discrepancies between the major and trace element compositions of type 1 and 2 rhyolites. Additionally, the lower Mg# and δEu values of type 2 rhyolites are partly caused by significant magmatic differentiation. Quasi-linear correlations between some major oxides, trace element ratios and Sr-Nd isotopic ratios for type 2 rhyolites suggest that these rhyolites might have been contaminated by crustal rocks or melts with compositions similar to those of the Kueishantao (KST) andesites or the Middle Miocene upper crustal rocks of SW Japan. Therefore, isotopically enriched crustal materials likely remain in the OT crust.

Recombinant Goat VEGF164 Increases Hair Growth by Painting Process on the Skin of Shaved Mouse

Bao, Wenlei,Yin, Jianxin,Liang, Yan,Guo, Zhixin,Wang, Yanfeng,Liu, Dongjun,Wang, Xiao,Wang, Zhigang Asian Australasian Association of Animal Productio 2014 Animal Bioscience Vol.27 No.9

To detect goat vascular endothelial growth factor (VEGF)-mediated regrowth of hair, full-length VEGF164 cDNA was cloned from Inner Mongolia cashmere goat (Capra hircus) into the pET-his prokaryotic expression vector, and the recombinant plasmid was transferred into E. coli BL21 cells. The expression of recombinant $6{\times}his-gVEGF164$ protein was induced by 0.5 mM isopropyl thio-${\beta}$-D-galactoside at $32^{\circ}C$. Recombinant goat VEGF164 (rgVEGF164) was purified and identified by western blot using monoclonal anti-his and anti-VEGF antibodies. The rgVEGF164 was smeared onto the dorsal area of a shaved mouse, and we noted that hair regrowth in this area was faster than in the control group. Thus, rgVEGF164 increases hair growth in mice.

Achieving high mass loading of Na₃V₂(PO₄)₃@carbon on carbon cloth by constructing three-dimensional network between carbon fibers for ultralong cycle-life and ultrahigh rate sodium-ion batteries

Guo, Donglei,Qin, Jinwen,Yin, Zhigang,Bai, Jinman,Sun, Yang-Kook,Cao, Minhua Elsevier 2018 Nano energy Vol.45 No.-

<P><B>Abstract</B></P> <P>The mass loading of the active materials in most flexible electrodes is relatively low, which greatly impedes their practical application. Here, we report a facile strategy to achieve high mass loading of Na<SUB>3</SUB>V<SUB>2</SUB>(PO<SUB>4</SUB>)<SUB>3</SUB>@carbon (NVP@C) supported on carbon cloth (NVP@C-CC) by a two-step coating followed by an annealing treatment and the resultant NVP@C-CC membrane can be used as a binder-free cathode for sodium ion batteries (SIBs). The NVP@C is not only uniformly anchored on the surface of carbon fibers of CC, but also filled between carbon fibers of CC in interconnected three-dimensional (3D) macroporous structure. It is because of the full use of the spaces between carbon fibers of CC that we achieve a high NVP@C mass loading. Thus-obtained NVP@C-CC exhibits excellent cyclability (82.0% capacity retention over 2000 cycles at 20C) and high rate capacity (96.8mAhg<SUP>−1</SUP> at 100C and 69.9mAhg<SUP>−1</SUP> at 200C) for sodium half cells and meanwhile the high mass loading of NVP@C on CC also endows the cell with fairly high energy and powder densities of 396Whkg<SUP>−1</SUP> and 97kWkg<SUP>−1</SUP>. Furthermore, it also presents superior cycling stability and rate performance when evaluated as full battery (NaTi<SUB>2</SUB>(PO<SUB>4</SUB>)<SUB>3</SUB>@C as the anode) cathode. This study offers a new strategy for achieving high mass loading of the active materials on flexible supports in flexible energy storage devices.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A two-step coating strategy is used to prepare NVP@C-CC electrode with high mass loading. </LI> <LI> The high mass loading is attributed to the full use of the spaces among carbon fibers by contructing three-dimensinal network. </LI> <LI> The NVP@C-CC exhibits excellent cycling performance and superior rate capacity for both sodium half cells and full cells. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>The NVP@C-CC electrode with high mass loading was achieved by contructing three-dimensinal network among carbon fibers. The NVP@C-CC electrode exhibits excellent cycling performance and superior rate capacity for both sodium half cells and full cell cathode (NaTi<SUB>2</SUB>(PO<SUB>4</SUB>)<SUB>3</SUB>@C as the anode). To further demonstrate its potential application, the as-prepared full cell can easy to power commercial red light-emitting diode bulb after being fully charged.</P> <P>[DISPLAY OMISSION]</P>

<i>OsASR5</i> enhances drought tolerance through a stomatal closure pathway associated with ABA and H ₂ O ₂ signalling in rice

Li, Jinjie,Li, Yang,Yin, Zhigang,Jiang, Jihong,Zhang, Minghui,Guo, Xiao,Ye, Zhujia,Zhao, Yan,Xiong, Haiyan,Zhang, Zhanying,Shao, Yujie,Jiang, Conghui,Zhang, Hongliang,An, Gynheung,Paek, Nam‐,Cho John Wiley and Sons Inc. 2017 Plant biotechnology journal Vol.15 No.2

<P><B>Summary</B></P><P>Drought is one of the major abiotic stresses that directly implicate plant growth and crop productivity. Although many genes in response to drought stress have been identified, genetic improvement to drought resistance especially in food crops is showing relatively slow progress worldwide. Here, we reported the isolation of <I>abscisic acid</I>,<I> stress</I> and <I>ripening</I> (<I>ASR</I>) genes from upland rice variety, IRAT109 (<I>Oryza sativa</I> L. ssp. <I>japonica</I>), and demonstrated that overexpression of <I>OsASR5</I> enhanced osmotic tolerance in <I>Escherichia coli</I> and drought tolerance in <I>Arabidopsis</I> and rice by regulating leaf water status under drought stress conditions. Moreover, overexpression of <I>OsASR5</I> in rice increased endogenous ABA level and showed hypersensitive to exogenous ABA treatment at both germination and postgermination stages. The production of H<SUB>2</SUB>O<SUB>2</SUB>, a second messenger for the induction of stomatal closure in response to ABA, was activated in overexpression plants under drought stress conditions, consequently, increased stomatal closure and decreased stomatal conductance. In contrast, the loss‐of‐function mutant, <I>osasr5</I>, showed sensitivity to drought stress with lower relative water content under drought stress conditions. Further studies demonstrated that OsASR5 functioned as chaperone‐like protein and interacted with stress‐related HSP40 and 2OG‐Fe (II) oxygenase domain containing proteins in yeast and plants. Taken together, we suggest that <I>OsASR5</I> plays multiple roles in response to drought stress by regulating ABA biosynthesis, promoting stomatal closure, as well as acting as chaperone‐like protein that possibly prevents drought stress‐related proteins from inactivation.</P>

Analysis of high speed bearing based on virtual rods model

Guang Zeng,Chunjiang Zhao,Xiaokai Yu,Yufeng Yin,Zhigang Xiao,Yijie Feng 대한기계학회 2020 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.34 No.5

The traditional high-speed ball bearing analysis is based on the quasi-static model proposed by Jones-Harris (J-H). This study gives another bearing analysis model based on the relative position of the ball center and the centers of curvature of the raceway grooves, described by the virtual rods. Specifically, the load and deformation of the virtual rods are determined according to the principle of force transmissibility, the translation theorem of a force, and elastic-contact deformation between steel ball bearings and raceway grooves. And the iterative variables such as the axial, radial and angular deformations are gradually introduced into the calculation model to solve the force and kinematic parameters under pure axial load, bidirectional and tri-directional combined loads. The correctness of the virtual rods model is verified by the contact angle for axial and bidirectional load. The influence of gyroscopic moment and raceway grooves control parameter on the actual contact angle under tridirectional loading conditions are calculated and analyzed respectively. The proposed model uses fewer equations and lower-dimension parameters than those used by the traditional highspeed ball bearing analysis method, improves the solution rate of the equations.

Facile Synthesis of Ag/ZnO Hollow Microspheres with Enhanced Photocatalytic Performance under Simulated Sunlight Irradiation

Lifeng Cui,Qiulin Zhang,Chaochuang Yin,Shifei Kang,Zhigang Ge,Qineng Xia,Yangang Wang,Xi Li 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2019 NANO Vol.14 No.3

Water pollution caused by intensive use of organic dyes has become an increasingly serious problem recently. Green and efficient processes are desperately needed to remove persistent organic pollutants from waste waters. Herein, Ag nanoparticles loaded ZnO hollow microspheres were synthesized through a simple solvothermal method and used as a photocatalyst for dye degradation. The calculated band gap of Ag/ZnO — 5% (2.97 eV) is much narrower than that of pure ZnO (3.37 eV). The obtained Ag/ZnO samples show a remarkable photocatalytic activity in photodegradation of Rhodamine B (RhB) under simulated sunlight irradiation. The degradation efficiency of RhB for Ag/ZnO — 5% is 98.8% after 100 min irradiation while only 52.8% degradation rate is obtained over pure ZnO. The enhancement is attributed to the exposed active ZnO (001) plane and the surface plasmon resonance (SPR) effect of Ag nanoparticles that promote the separation of photogeneated electrons and holes.

Adsorption mechanism of lead ions at ilmenite/water interface and its influence on ilmenite flotability

Pan Chen,Jihua Zhai,Wei Sun,Yue-hua Hu,Zhigang Yin,Xiangsheng Lai 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.53 No.-

In order to get further understanding of lead ions adsorption onto ilmenite surface, zeta potential analysis, adsorption density calculation, FT-IR and XPS analysis were employed. The results showed that the adsorption of lead ions onto ilmenite surface was a chemically dominating process. Lead species could interact with iron-hydroxyl complex compounds to form a Fe–O–Pb complex. The hydrophobic complex of Pb(OL)2 was also observed. Iron and adsorbed lead ions on ilmenite surface served as the main active-sites via chemisorption with oleate species. Introducing lead ions, as a surface modification means, can efficiently improve ilmenite flotability.

Stable Sheet-Beam Transport in Periodic Nonsymmetric Quadrupole Field

Zhanliang Wang,Yubin Gong,Yanyu Wei,Zhaoyun Duan,Huarong Gong,Zhigang Lu,Lingna Yue,Hairong Yin,Jin Xu,Yuanbao Li,Pukun Liu,Gun-Sik Park IEEE 2010 IEEE transactions on plasma science Vol.38 No.1

<P>Stable sheet electron-beam transport is critical for sheet-beam microwave device which is attractive for high-power millimeter wave to terahertz-regime radiation. This paper studies the stable sheet-beam transport in periodic nonsymmetric quadrupole field. First, the conditions for stable round- and sheet-beam transport in periodic magnetic quadrupole field are deduced. In the deduction, we find that the symmetric quadrupole field and the space-charge field of sheet beam are not well matched. In order to settle this problem, we use periodic nonsymmetric quadrupole field instead of periodic symmetric quadrupole field to transport sheet beam. Finally, 3-D PIC simulations verify the conditions for stable sheet-beam transport and show that periodic nonsymmetric quadrupole field is intrinsically well suited for sheet-beam transport.</P>