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749 results on '"Zhong, Zhiyong"'

201. Accordion-like composite of carbon-coated Fe3O4 nanoparticle decorated Ti3C2 MXene with enhanced electrochemical performance.

Author

Wang, Xiaoyi, Chen, Wenhao, Liao, Yulong, Xiang, Quanjun, Li, Yuanxun, Wen, Tianlong, and Zhong, Zhiyong

Subjects
ELECTRODE potential, ENERGY storage, NANOPARTICLES, LITHIUM-ion batteries, CHEMICAL stability, TITANIUM composites
Abstract

MXene-based materials are considered to be promising candidates for electrodes in energy storage field owing to their features of two-dimensional layered structure, good conductivity, and chemical stability. Carbon-coated Fe3O4 nanoparticles (C@Fe3O4 NPs)-decorated Ti3C2 MXene composites were synthesized via a facile method for the first time. The prepared C@Fe3O4 NPs/Ti3C2 MXene composite was characterized by various techniques (XRD, SEM, TEM, TGA, and XPS), and the results showed that C@Fe3O4 NPs (diameter: 60 nm, layer thickness: 10 nm) were homogeneously distributed on the surfaces of Ti3C2 MXene interlayers while the accordion-like structure maintained. It is noted that the specific surface areas dramatically increased from 7.8 m2/g to 37.0 m2/g after introducing the nanoparticles. The C@Fe3O4 NPs/Ti3C2 MXene products exhibited a specific capacity of 231.5 mAh g−1 after 200 cycles under 100 mA/g when serving as anode materials for Li-ion batteries, which was markedly higher than that of pure Ti3C2 MXene (107.8 mAh g−1). This study presents and investigates a novel kind of MXene-based composite, which has the potential as electrode materials for energy storage. [ABSTRACT FROM AUTHOR]

Published
2021
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202. Interfacial chemical states and recoverable spin pumping in YIG/Pt.

Author

Li, Mingming, Zhang, Dainan, Jin, Lichuan, Liu, Bo, Zhong, Zhiyong, Tang, Xiaoli, Meng, Hao, Yang, Qinghui, Zhang, Lei, and Zhang, Huaiwu

Subjects
SPIN Hall effect, ION bombardment, SPINTRONICS, X-ray photoelectron spectroscopy, CHEMICAL properties
Abstract

Ion etching is an essential step in the processing of spintronic devices. In this work, we investigated the role of argon ion (Ar+) bombardment in the spin pumping and inverse spin Hall effect in the Y3Fe5O12/Pt (YIG/Pt) heterostructure. The inverse spin Hall voltage is found to reduce by an order of two when the argon ion bombardment is employed on the YIG surface before the deposition of the Pt layer. This giant inhibition of spin injection efficiency is undesirable. In this work, we propose an experimental technique for its recovery via a chemical route. The interface property and chemical state were identified by transmission electron microscopy, Raman spectroscopy, and x-ray photoelectron spectroscopy. We found that the argon ion bombardment on the YIG surface leads to an increase in the ratio of Fe2+ ions in the YIG/Pt interface region. Moreover, the interface magnetic moment reduces in the presence of Fe2+ ions, which resulted in the decrease in spin injection efficiency. A strong oxidizing solution (a mixture of concentrated H2SO4 and 30% H2O2 of 1:1 volume ratio) was used to recover the valence of iron and subsequently the interface magnetic moment. Our results are helpful for the understanding of the importance of interface properties and the optimization of spintronic device processing technology. [ABSTRACT FROM AUTHOR]

Published
2021
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203. Large magnon band gaps created by introducing additional lattice scatterers.

Author

Wang, Qi, Zhong, Zhiyong, Jin, Lichuan, Tang, Xiaoli, Bai, Feimin, and Zhang, Huaiwu

Subjects
*MAGNONS, *PHONON-magnon interactions, *PLANE wavefronts, *CRYSTAL symmetry, *LATTICE theory
Abstract

Magnon band gaps (MBGs) in 2D square and honeycomb lattices of circular cross-section rods can be increased by introducing a smaller diameter rod into the center of each lattice unit cell. The additional lattice scatterers reduce the structure symmetry to create significantly larger band gaps for original lattice. Magnon band structures are numerically calculated using the plane-wave method. The results show that the normalized width of band gaps in square-hybrid-rods and honeycomb-hybrid-rods structure are 167% and 285% sizes of those in the corresponding square-single-rods and honeycomb-single-rods structure. Crystal symmetry reduction by introducing additional scatterers opens up a new way for engineering MBGs of 2D magnonic crystals. [ABSTRACT FROM AUTHOR]

Published
2013
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204. Effects of ruthenium seed layer on the microstructure and spin dynamics of thin permalloy films.

Author

Jin, Lichuan, Zhang, Huaiwu, Tang, Xiaoli, Bai, Feiming, and Zhong, Zhiyong

Subjects
THIN film research, ROTATIONAL motion, RUTHENIUM, PHYSICS research
Abstract

The spin dynamics and microstructure properties of a sputtered 12 nm Ni81Fe19 thin film have been enhanced by the use of a ruthenium seed layer. Both the ferromagnetic resonance field and linewidth are enhanced dramatically as the thickness of ruthenium seed layer is increased. The surface anisotropy energy constant can also be largely tailored from 0.06 to 0.96 erg/cm-2 by changing the seed layer thickness. The changes to the dynamics magnetization properties are caused by both ruthenium seed layer induced changes in the Ni81Fe19 structure properties and surface topography properties. Roughness induced inhomogeneous linewidth broadening is also seen. The damping constant is highly tunable via the ruthenium thickness. This approach can be used to tailor both the structure and spin dynamic properties of thin Ni81Fe19 films over a wide range. And it may benefit the applications of spin dynamics and spin current based devices. [ABSTRACT FROM AUTHOR]

Published
2013
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211. Semiconductor terahertz modulator arrays: the size and edge effect

Author

Wen, Tianlong, primary, Zhang, Chong, additional, Zhang, Xiaochen, additional, Liao, Yulong, additional, Xiang, Quanjun, additional, Wen, Qiye, additional, Zhang, Dainan, additional, Li, Yuanpeng, additional, Zhang, Huaiwu, additional, Jing, Yulan, additional, and Zhong, Zhiyong, additional

Published
2018
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216. Toxicity of Trimethyltin and Dimethyltin in Rats and Mice

Author

James R. Olson, Xuefeng Ren, Shenglai Liu, Xiaojiang Tang, Guanchao Lai, Zhong Zhiyong, Xin Wu, Banghua Wu, Amber M. Dubois, Hongbin Gao, Zhihong Gong, Gang Sui, and Zhongning Lin

Subjects
Male, Chronic exposure, Neurotoxicity Syndrome, Health, Toxicology and Mutagenesis, Hypokalemia, Environmental media, Pharmacology, Toxicology, Rats, Sprague-Dawley, Mice, Organotin Compounds, medicine, Animals, Trimethyltin Compounds, Chemistry, Blood potassium level, Neurotoxicity, General Medicine, medicine.disease, Pollution, Acute toxicity, Rats, Toxicity, Environmental Pollutants, Female, Neurotoxicity Syndromes, medicine.symptom, human activities
Abstract

Extensive uses of methyltin compounds in polyvinyl chloride (PVC) production have led to a dramatic increase of occupational-related methyltin poisoning accidents and the widespread contamination of methyltins in various environmental media. Here, we conducted studies to compare the acute toxicity induced by trimethyltin (TMT) and dimethyltin (DMT), and investigated the cumulative toxic effects of TMT in rats and mice. Neurobehavioral changes were observed in rats and mice treated with either DMT or TMT, but we also observed that both TMT and DMT exposure in rats significantly lowered the blood potassium level. Moreover, the cumulative toxic coefficient factor of TMT was 1.7 in rats versus 3.8 in mice, suggesting a high cumulative risk for rats and a moderate risk for mice. In summary, we demonstrated that acute and chronic exposure to methyltin compounds induced neurotoxicity and hypokalemia. Moreover, our study suggests that TMT can accumulate in the body and pose a risk for workers chronically exposed to a low dose of TMT.

Published
2013
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217. Mobilization and removing of cadmium from kidney by GMDTC utilizing renal glucose reabsorption pathway

Author

Zhong Zhiyong, Zhihong Gong, Jinlin Zhou, Guoding Li, Xiaolin Ruan, Minhui Luo, Xuefeng Ren, James R. Olson, Gaofeng Liu, Chenzi Zhang, Guangxian Li, Fan Fei, Jinqiu Zhu, and Xiaojiang Tang

Subjects
0301 basic medicine, Male, medicine.medical_specialty, medicine.medical_treatment, Intraperitoneal injection, Toxicology, Kidney, Article, Cell Line, Rats, Sprague-Dawley, 03 medical and health sciences, Methionine, Sodium-Glucose Transporter 2, Internal medicine, medicine, Toxicity Tests, Acute, Animals, Humans, Chelating Agents, Pharmacology, Glucose Transporter Type 2, Glucosamine, biology, business.industry, Lethal dose, Toxicity Tests, Subchronic, Glucose transporter, Renal glucose reabsorption, 030104 developmental biology, Endocrinology, medicine.anatomical_structure, Glucose, Sodium/Glucose Cotransporter 2, Toxicity, biology.protein, GLUT2, Female, Rabbits, business, Cadmium
Abstract

Chronic exposure to cadmium compounds (Cd(2+)) is one of the major public health problems facing humans in the 21st century. Cd(2+) in the human body accumulates primarily in the kidneys which leads to renal dysfunction and other adverse health effects. Efforts to find a safe and effective drug for removing Cd(2+) from the kidneys have largely failed. We developed and synthesized a new chemical, sodium (S)-2-(dithiocarboxylato((2S,3R,4R,5R)-2,3,4,5,6 pentahydroxyhexyl)amino)-4-(methylthio) butanoate (GMDTC). Here we report that GMDTC has a very low toxicity with an acute lethal dose (LD50) of more than 10,000mg/kg or 5000mg/kg body weight, respectively, via oral or intraperitoneal injection in mice and rats. In in vivo settings, up to 94% of Cd(2+) deposited in the kidneys of Cd(2+)-laden rabbits was removed and excreted via urine following a safe dose of GMDTC treatment for four weeks, and renal Cd(2+) level was reduced from 12.9μg/g to 1.3μg/g kidney weight. We observed similar results in the mouse and rat studies. Further, we demonstrated both in in vitro and in animal studies that the mechanism of transporting GMDTC and GMDTC-Cd complex into and out of renal tubular cells is likely assisted by two glucose transporters, sodium glucose cotransporter 2 (SGLT2) and glucose transporter 2 (GLUT2). Collectively, our study reports that GMDTC is safe and highly efficient in removing deposited Cd(2+) from kidneys assisted by renal glucose reabsorption system, suggesting that GMDTC may be the long-pursued agent used for preventive and therapeutic purposes for both acute and chronic Cd(2+) exposure.

Published
2016

218. Neuroleptic malignant syndrome and subsequent clozapine-withdrawal effects in a patient with refractory schizophrenia

Author

Wen, Shenglin, Cheng,Minfeng, Gu,Huaying, Zheng,Liangrong, wang,houliang, and Zhong,Zhiyong

Subjects
Neuropsychiatric Disease and Treatment
Abstract

Minfeng Cheng,* Huaying Gu,* Liangrong Zheng, Houliang Wang, Zhiyong Zhong, Shenglin Wen Department of Psychiatry, Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, People’s Republic of China *These authors contributed equally tothis work Abstract: Here, we report a female patient developing neuroleptic malignant syndrome following the use of a combination of clozapine and haloperidol. Subsequently, the patient presented withdrawal effects after an abrupt discontinuation of clozapine. Psychiatrists not aware of possible clozapine-withdrawal effects may misdiagnose as a part of the primary mental illness or as the initial symptoms worsening, if unrecognized. Keywords: clozapine, neuroleptic malignant syndrome, withdrawal effect, schizophrenia

Published
2016

226. Alterations of white matter fractional anisotropy in unmedicated obsessive–compulsive disorder

Author

Tao,Jiong, Wang,Xianglan, Zhong,Zhiyong, Han,Hongying, Liu,Sha, Wen,Shenglin, Guan,Nianhong, Li,Lingjiang, Tao,Jiong, Wang,Xianglan, Zhong,Zhiyong, Han,Hongying, Liu,Sha, Wen,Shenglin, Guan,Nianhong, and Li,Lingjiang

Abstract

Jiong Tao,1,2 Xianglan Wang,2 Zhiyong Zhong,1,2 Hongying Han,2 Sha Liu,3 Shenglin Wen,4 Nianhong Guan,2 Lingjiang Li1 1Mental Health Institute of the Second Xiangya Hospital, Central South University, Changsha, 2Department of Psychiatry, The Third Affiliated Hospital of Sun Yat-sen University, 3Department of Radiology, Guangzhou Huiai Hospital, Guangzhou, 4Department of Psychiatry, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, People’s Republic of China Background: Abnormalities in white matter (WM) have previously been reported in patients with obsessive–compulsive disorder (OCD). However, there was some inconsistency in the results obtained for altered regions of WM. The aim of this study was to investigate fractional anisotropy (FA) in the WM of the whole brain in patients with OCD by using diffusion tensor imaging (DTI).Methods: In total, 28 unmedicated patients with OCD and 28 healthy volunteers underwent DTI scan. A voxel-based analysis was used to compare FA values in WM of the two groups at a voxel threshold of P<0.005 with an extent threshold of k>72 voxels (P<0.05; Alphasim correction). Subsequently, correlation analysis was conducted in order to find the correlation between the mean FA values in significantly altered brain regions and Yale–Brown Obsessive Compulsive Scale (Y-BOCS) scores of the OCD patients.Results: Compared with healthy volunteers, the OCD patients had lower FA value in the left lingual gyrus, right midbrain, and right precuneus. There were no regions with significantly higher FA values in OCD patients compared with healthy volunteers. The mean FA values in the above regions (left lingual, r=0.019, P=0.923; right midbrain, r=-0.208, P=0.289; and right precuneus, r=-0.273, P=0.161) had no significant correlation with the Y-BOCS scores of the OCD patients.Conclusion: The findings of this study suggest that alterations in WM of the left lingual gyrus, right midbr

Published
2016

227. Brief behavioral treatment for patients with treatment-resistant insomnia

Author

Wang,Jihui, Wei,Qinling, wu,xiali, Zhong,Zhiyong, Li,Guanying, Wang,Jihui, Wei,Qinling, wu,xiali, Zhong,Zhiyong, and Li,Guanying

Abstract

Jihui Wang, Qinling Wei, Xiaoli Wu, Zhiyong Zhong, Guanying Li Department of Psychiatry, The Third Affiliated Hospital of Sun-Yat Sen University, Guangzhou, Guangdong, People’s Republic of China Objective: To evaluate the efficacy of brief behavioral treatment for insomnia (BBTI) in treating patients with treatment-resistant insomnia.Methods: Seventy-nine adults with treatment-resistant insomnia were randomly assigned to receive either individualized BBTI (delivered in two in-person sessions and two telephone “booster” sessions, n=40) or sleep hygiene education (n=39). The primary outcome was sub­jective (sleep diary) measures of self-report symptoms and questionnaire measures of Pittsburgh sleep quality index (PSQI), insomnia severity index (ISI), Epworth sleeping scale (ESS), and dysfunctional beliefs and attitudes about sleep scale (DBAS).Results: The repeated-measures analysis of variance showed significant time effects between pretreatment and posttreatment in the scale ratings of PSQI, ESS, DBAS, ISI, sleep latency (SL), time in bed (TIB), sleep efficiency (SE), and wake after sleep onset (WASO) in both groups and group × time interaction (FPSQI =3.893, FESS =4.500, FDBAS =5.530, FISI =15.070, FSL =8.909, FTIB =7.895, FSE =2.926, and FWASO =2.595). The results indicated significant differences between BBTI and sleep hygiene in change scores of PSQI, ESS, DBAS, ISI, SL, TIB, SE, and WASO. Effect sizes were moderate to large.Conclusion: BBTI is a simple and efficacious intervention for chronic insomnia in adults. Keywords: brief behavioral treatment, treatment-resistant, insomnia

Published
2016

228. Neuroleptic malignant syndrome and subsequent clozapine-withdrawal effects in a patient with refractory schizophrenia

Author

Cheng,Minfeng, Gu,Huaying, Zheng,Liangrong, wang,houliang, Zhong,Zhiyong, Wen,Shenglin, Cheng,Minfeng, Gu,Huaying, Zheng,Liangrong, wang,houliang, Zhong,Zhiyong, and Wen,Shenglin

Abstract

Minfeng Cheng,* Huaying Gu,* Liangrong Zheng, Houliang Wang, Zhiyong Zhong, Shenglin Wen Department of Psychiatry, Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, People’s Republic of China *These authors contributed equally to this work Abstract: Here, we report a female patient developing neuroleptic malignant syndrome following the use of a combination of clozapine and haloperidol. Subsequently, the patient presented withdrawal effects after an abrupt discontinuation of clozapine. Psychiatrists not aware of possible clozapine-withdrawal effects may misdiagnose as a part of the primary mental illness or as the initial symptoms worsening, if unrecognized. Keywords: clozapine, neuroleptic malignant syndrome, withdrawal effect, schizophrenia

Published
2016

234. Mobilization and removing of cadmium from kidney by GMDTC utilizing renal glucose reabsorption pathway

Author

Tang, Xiaojiang, primary, Zhu, Jinqiu, additional, Zhong, Zhiyong, additional, Luo, Minhui, additional, Li, Guangxian, additional, Gong, Zhihong, additional, Zhang, Chenzi, additional, Fei, Fan, additional, Ruan, Xiaolin, additional, Zhou, Jinlin, additional, Liu, Gaofeng, additional, Li, Guoding, additional, Olson, James, additional, and Ren, Xuefeng, additional

Published
2016
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250. Improving the high-frequency magnetic properties of as-deposited CoFe films by ultra-low gas pressure.

Author

Tang, XiaoLi, Yu, You, Su, Hua, Zhang, HuaiWu, Zhong, ZhiYong, and Jing, YuLan

Subjects
IRON-cobalt alloys, THIN films, ARGON, MAGNETIC anisotropy, SPUTTERING (Physics), ATOMIC force microscopy
Abstract

CoFe films without buffer layers were deposited at different ultra-low argon pressures ranging from 0.085 to 0.847 mTorr. This pressure range was one to two orders lower than the normal sputtering pressure. As a consequence, the static magnetic properties, including coercivity and magnetic anisotropy field, were improved with decrease argon pressure. The high-frequency permeability spectra showed that the resonance frequency and the damping factor of the films also reached optimal values at ultra-low pressure. Basing on atomic force microscopy observations, we attributed the excellent properties to the improved morphologies of the films and released internal stress. [ABSTRACT FROM AUTHOR]

Published
2018
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