15 results on '"Zhang, Yubin"'
Search Results
2. Characterization of the interaction between allicin and soy protein isolate and functional properties of the adducts.
- Author
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Li, Yunliang, Jia, Shifang, Zhang, Yubin, Huang, Liurong, He, Ronghai, and Ma, Haile
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SOY proteins ,GLOBULAR proteins ,FOOD emulsifiers ,SOYBEAN meal ,SULFHYDRYL group - Abstract
Background: Soybean meal, a by‐product of the soybean oil production industry, has a high protein content but the compact globular structure of the protein from soybean meal limits its wide application in food processing. Allicin has been found to have numerous functional properties. In this study, allicin was interacted with soy protein isolate (SPI). The functional properties of the adducts were investigated. Results: Binding with allicin significantly quenched the fluorescence intensity of SPI. Static quenching was the main quenching mechanism. The stability of adducts decreased with increasing temperature. The greatest extent of binding between allicin and sulfhydryl groups (SH) of SPI was obtained at an allicin/SH molar ratio of 1:2. The amino groups of SPI did not bind with allicin covalently. Soy protein isolate was modified by allicin through covalent and non‐covalent interactions. Compared with SPI, the emulsifying activity index and foaming capacity of adducts with a ratio of 3:1 were improved by 39.91% and 64.29%, respectively. Soy protein isolate‐allicin adducts also exhibited obvious antibacterial effects. The minimum inhibitory concentrations (MICs) of SPI‐allicin adducts on Escherichia coli and Staphylococcus aureus were 200 and 160 μg mL−1, respectively. Conclusion: The interaction of allicin with SPI is beneficial for the functional properties of SPI. These adducts can be used in different food formulations as emulsifiers, foamers, and transport carriers. © 2023 Society of Chemical Industry. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
3. Recurrent pacemaker‐mediated arrhythmia with a right bundle branch block pattern in a patient with a cardiac resynchronization therapy device.
- Author
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Zhang, Yubin, Han, Yiru, and Zheng, Liangrong
- Abstract
Under certain conditions, cardiovascular implantable electronic devices can be directly involved in initiating and sustaining pacemaker‐mediated arrhythmias (PMA), of which repetitive reentrant ventriculoatrial synchrony (RRVAS) is the most well‐known and common type. RRVAS, also known as pacemaker‐mediated tachycardia, was commonly secondary to atrioventricular (AV) dissociation and subsequent ventriculoatrial (VA) conduction. RRVAS in a biventricular system is rare due to its less predisposition to the appearance of AV dissociation and subsequent VA conduction, but urgent in its adverse impact on cardiac resynchronization therapy (CRT), which may predispose to exacerbated heart failure. We present a rare case of recurrent PMA manifested as a right bundle branch block pattern in a patient with a CRT device. Notably, most episodes of PMA were triggered by a premature atrial contraction accompanied by the appearance of VA conduction with no prolongation of AV delay. In this study, we have demonstrated the impact of the appearance of VA conduction due to the loss of capture of right ventricular lead and its potential risk for inducing RRVAS in a CRT device. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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4. Indexing of superimposed Laue diffraction patterns using a dictionary–branch–bound approach.
- Author
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Seret, Anthony, Gao, Wenqiang, Juul Jensen, Dorte, Godfrey, Andy, and Zhang, Yubin
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IMAGE converters ,X-ray diffraction ,CRYSTAL orientation ,OPTICAL diffraction - Abstract
X‐ray Laue diffraction is an important method for characterizing the local crystallographic orientation and elastic strain in polycrystalline materials. Existing analysis methods are designed mainly to index a single or a few Laue diffraction pattern(s) recorded in a detector image. In this work, a novel method called dictionary–branch–bound (DBB) is presented to determine the crystallographic orientations of multiple crystals simultaneously illuminated by a parallel X‐ray incident beam, using only the spot positions in a detector image. DBB is validated for simulated X‐ray Laue diffraction data. In the simulation, up to 100 crystals with random crystallographic orientations are simultaneously illuminated. Fake spots are randomly added to the detector image to test the robustness of DBB. Additionally, spots are randomly removed to test the resilience of DBB against true spots that are undetected due to background noise and/or spot overlap. Poisson noise is also added to test the sensitivity of DBB to less accurate positions of detected spots. In all cases except the most challenging one, a perfect indexing with a mean angular error below 0.08° is obtained. To demonstrate the potential of DBB further, it is applied to synchrotron microdiffraction data. Finally, guidelines for using DBB in experimental data are provided. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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5. A sudden change in pacing rate: Normal or malfunction?
- Author
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Han, Yiru, Zhang, Yubin, Liu, Tong, and Zheng, Liangrong
- Abstract
A woman with a dual‐chamber pacemaker was examined for recurrent chest discomfort and palpitations at our hospital. The Holter monitor test recorded recurrent episodes of a sudden increase in pacing rate from 60 to 105 bpm, which corresponded to the symptoms. Orthodromic pacemaker‐mediated arrhythmia (OPMA), caused by ventricular lead dislodgement and atrial far‐field sensing, caused the recurrent episodes of a sudden change in pacing rate. The occurrence of OPMA may represent a rare but noteworthy pacemaker problem. To our knowledge, our study reports the first case of PMA that only occurs, and is maintained, in the DDI mode. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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6. Three‐dimensional grain resolved strain mapping using laboratory X‐ray diffraction contrast tomography: theoretical analysis.
- Author
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Lindkvist, Adam and Zhang, Yubin
- Subjects
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X-ray diffraction , *TOMOGRAPHY , *STRAIN tensors , *GRAIN , *GRAIN size , *LABORATORIES - Abstract
Laboratory diffraction contrast tomography (LabDCT) is a recently developed technique to map crystallographic orientations of polycrystalline samples in three dimensions non‐destructively using a laboratory X‐ray source. In this work, a new theoretical procedure, named LabXRS, expanding LabDCT to include mapping of the deviatoric strain tensors on the grain scale, is proposed and validated using simulated data. For the validation, the geometries investigated include a typical near‐field LabDCT setup utilizing Laue focusing with equal source‐to‐sample and sample‐to‐detector distances of 14 mm, a magnified setup where the sample‐to‐detector distance is increased to 200 mm, a far‐field Laue focusing setup where the source‐to‐sample distance is also increased to 200 mm, and a near‐field setup with a source‐to‐sample distance of 200 mm. The strain resolution is found to be in the range of 1–5 × 10−4, depending on the geometry of the experiment. The effects of other experimental parameters, including pixel binning, number of projections and imaging noise, as well as microstructural parameters, including grain position, grain size and grain orientation, on the strain resolution are examined. The dependencies of these parameters, as well as the implications for practical experiments, are discussed. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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7. Imbalanced GSH/ROS and sequential cell death.
- Author
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Liu, Ting, Sun, Li, Zhang, Yubin, Wang, Yonglin, and Zheng, Jiang
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CELL death ,UNSATURATED fatty acids ,REACTIVE oxygen species ,BIOMACROMOLECULES ,FREE radicals ,BIOMOLECULES - Abstract
Reactive oxygen species (ROS) are produced in cells during metabolic processes. Excessive intracellular ROS may react with large biomolecules, such as DNA, RNA, proteins, and small biomolecules, that is, glutathione (GSH) and unsaturated fatty acids. GSH has physiological functions, including free radical scavenging, anti‐oxidation, and electrophile elimination. The disruption of ROS/GSH balance results in the deleterious oxidation and chemical modification of biomacromolecules, which eventually leads to cell‐cycle arrest and proliferation inhibition, and even induces cell death. Imbalanced ROS/GSH may result from a direct increase of ROS, consumption of GSH, intracellular oxidoreductase interference, or thioredoxin activity reduction. Some chemicals including arsenic trioxide (ATO), pyrogallol (PG), and carbobenzoxy‐Leu‐Leu‐leucinal (MG132) could also disrupt the balance of GSH and ROS. This article reviews the occurrence and consequences of the imbalance between GSH and ROS and introduces factors responsible for the disruption of cellular ROS and GSH balance, resulting in cell death. "GSH" and "ROS" were used as keywords to search the relevant literaturess. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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8. Optimizing laboratory X‐ray diffraction contrast tomography for grain structure characterization of pure iron.
- Author
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Lindkvist, Adam, Fang, Haixing, Juul Jensen, Dorte, and Zhang, Yubin
- Subjects
X-ray diffraction ,TOMOGRAPHY ,PHOTON counting ,IRON ,DIFFRACTION patterns ,GRAIN - Abstract
Laboratory diffraction contrast tomography (LabDCT) is a recently developed technique for 3D nondestructive grain mapping using a conical polychromatic beam from a laboratory‐based X‐ray source. The effects of experimental parameters, including accelerating voltage, exposure time and number of projections used for reconstruction, on the characterization of the 3D grain structure in an iron sample are quantified. The experiments were conducted using a commercial X‐ray tomography system, ZEISS Xradia 520 Versa, equipped with a LabDCT module; and the data analysis was performed using the software package GrainMapper3D, which produces a 3D reconstruction from binarized 2D diffraction patterns. It is found that the exposure time directly affects the background noise level and thus the ability to distinguish weak spots of small grains from the background. With the assistance of forward simulations, it is found that spots from the first three strongest {hkl} families of a large grain can be seen with as few as 30–40 projections, which is sufficient for indexing the crystallographic orientation and resolving the grain shape with a reasonably high accuracy. It is also shown that the electron current is a more important factor than the accelerating voltage to be considered for optimizing the photon numbers with energies in the range of 20–60 keV. This energy range is the most important one for diffraction of common metals, e.g. iron and aluminium. Several suggestions for optimizing LabDCT experiments and 3D volume reconstruction are finally provided. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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9. Damage evolution around white etching layer during uniaxial loading.
- Author
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Jessop, Casey, Ahlström, Johan, Persson, Christer, and Zhang, Yubin
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DIGITAL image correlation ,ROLLING contact fatigue ,MATERIAL fatigue ,FRACTURE mechanics ,ROLLING contact ,FATIGUE cracks ,RESIDUAL stresses - Abstract
Rolling contact fatigue cracks and thermally induced defects are common problems in the railway industry especially as demands for increasing loads, speeds, and safety continue to rise. Often, the two types of defects are found together in the field, however, whether one causes the other to occur is not completely agreed upon. The effect of thermal damage, in the form of a martensite spot on pearlitic steel test bars, on the fatigue life in uniaxial low cycle fatigue experiments was investigated by the authors. However, the focus of the current work was to characterize the damage evolution from the low cycle fatigue (LCF) tests and correlate the crack initiation and propagation with the initial thermal damage. Residual stress measurements, digital image correlation, and X‐ray tomography were used to characterize the effects of the thermal damage before, during, and after fatigue testing, respectively. It was found that the thermal damage causes strain accumulation and crack initiation at the interface between the two materials. The strain evolution was visualized using digital image correlation (DIC), clearly showing the strain concentrations at the top and bottom of the white etching layers (WEL), where the residual stresses are also most tensile. X‐ray tomography confirmed the planar crack growth from the martensite spot. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
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10. Alignment of sample position and rotation during in situ synchrotron X‐ray micro‐diffraction experiments using a Laue cross‐correlation approach.
- Author
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Zhang, Chenglu, Zhang, Yubin, Wu, Guilin, Liu, Wenjun, Xu, Ruqing, Juul Jensen, Dorte, and Godfrey, Andrew
- Subjects
- *
SYNCHROTRONS , *DIGITAL image correlation , *X-rays , *ROTATIONAL motion , *DIFFRACTION patterns , *MECHANICAL properties of condensed matter - Abstract
Laue micro‐diffraction has proven to be able to reveal material properties at the sub‐grain scale for many polycrystalline materials and is now routinely available at several synchrotron facilities, providing an approach for nondestructive three‐dimensional probing of the microstructures and mechanical states of materials. However, for in situ experiments, maintaining the positioning of the sample throughout the experiment, to achieve a good alignment of the characterized volumes, is a challenging issue. The aim of the present work is to address this problem by developing an approach based on digital image correlation of focused‐beam Laue diffraction patterns. The method uses small changes in the diffraction signal as a focused X‐ray beam is scanned over a surface region to allow corrections to be made for both sample lateral movement and rotation. The method is demonstrated using a tensile deformation experiment on an Al sample with 2.5 µm average grain size. The results demonstrate an accuracy of 0.5 µm for sample position registration and a precision in sample rotation of ∼0.01°. The proposed method is fast to implement and does not require the use of additional surface markers. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
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11. "Unreasonable" ventricular pacings.
- Author
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Zhang, Yubin, Liu, Tong, and Korantzopoulos, Panagiotis
- Abstract
A 66‐year‐old man, implanted Abbott dual‐chamber pacemaker, was admitted to our hospital due to recurrent palpitation. ECG was recorded on admission, which created a diagnostic confusion: What accounts for the appearance of the VP in the setting of a stable intrinsic atrioventricular (AV) conduction? In this case, we will focus on the logical reasoning in the analysis of Pacing ECG. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
12. Application of Nano‐Polymer Emulsion for Inhibiting Shale Self‐Imbibition in Water‐Based Drilling Fluids.
- Author
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Xu, Jian‐gen, Qiu, Zhengsong, Zhao, Xin, Zhang, Yubin, Li, Gongrang, and Huang, Weian
- Subjects
SEDIMENTARY rocks ,FLUID mechanics ,CONTINUUM mechanics ,SURFACE chemistry ,ADATOMS - Abstract
Abstract: In order to effectively solve shale instability problems in the drilling process, the remarkable capillary effect of shale formations cannot be ignored. In this paper, we report the development and characterization of a nano‐polymer emulsion (SDPE) as a shale self‐imbibition control agent in water‐based drilling fluids. Spontaneous imbibition experiments, surface tension measurements, contact angle measurements, particle size distribution analysis, linear swelling tests, and hot‐rolling cuttings dispersion tests were conducted to evaluate the comprehensive performance of SDPE. The results show that the water absorption of shale samples in SDPE emulsions is significantly less than in deionized water. At a concentration of 2.0%, the absorption mass decreased from 7.51 to 2.59%. Reducing the surface tension of the testing fluids, increasing the contact angle of the shale samples, and maintaining the nanoscale size were the important considerations for SDPE to greatly decrease the capillary effect. The low swelling rate and high recovery rate indicate that SDPE also exhibits strong shale hydration inhibition performance. Compared with water‐based drilling fluids without SDPE, drilling fluids with SDPE present higher yield point/plastic viscosity values, and also decrease the filtration loss. Based on our findings, SDPE has the potential to be a good shale self‐imbibition control agent and to help mitigate the shale instability problems. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
13. Sensitive Electrochemical Detection of Bisphenol A Using Molybdenum Disulfide/Au Nanorod Composites Modified Glassy Carbon Electrode.
- Author
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Wang, Mingxia, Shi, Yifei, Zhang, Yubin, Wang, Yang, Huang, Huayu, Zhang, Jiangyi, and Song, Jinxi
- Subjects
ELECTROCHEMICAL electrodes ,BISPHENOL A ,MOLYBDENUM disulfide ,NANORODS ,CARBON electrodes ,ELECTROCHEMICAL sensors - Abstract
Bisphenol A, an important compound that is classified as an environmental hormone, has been proven to have harmful effects on human health and ecology. A molybdenum disulfide/Au nanorod-modified glassy carbon electrode was prepared as an electrochemical sensor for the detection of bisphenol A using a simple and convenient approach. UV-Vis spectrophotometry and transmission electron microscopy were employed to characterize the composite. The electrochemical behavior of bisphenol A at the modified electrode was investigated via differential pulse voltammetry and cyclic voltammetry. The results show that bisphenol A exhibits a good electrochemical signal at the modified electrode under optimized conditions, and a good linear relationship was observed between the bisphenol A concentration and peak current within the range of 0.01-50 μM, with a detection limit of 3.4 nM. Furthermore, the fabricated electrodes showed good anti-interference, reproducibility and stability. The proposed electrochemical method was successfully applied for the detection of bisphenol A in milk and water samples, and its potential for applications in pollutant detection was demonstrated. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
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14. Visualization investigation on flow field of journal bearing with partial texture surface.
- Author
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Lin, Qiyin, Wei, Zhengying, Ma, Shengli, Zhang, Yubin, and Wang, Ning
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JOURNAL bearings ,FLOW visualization ,BOUNDARY lubrication ,SURFACE texture ,SHAFTING machinery - Abstract
The effect of partial texture surface on flow field of journal bearing is investigated experimentally using a visualization apparatus, which was less reported before. The visualization results show that there is a speeding-up phenomenon in the movement of lubricant when lubricant flows from smooth surface region to dimple surface region, and the rising ratio of lubricant speed increases with the rotational speed of journal shaft. Copyright © 2016 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
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15. Histone deacetylase inhibitors FK228, N-(2-aminophenyl)-4-[ N-(pyridin-3-yl-methoxycarbonyl)amino- methyl]benzamide and m-carboxycinnamic acid bis-hydroxamide augment radiation-induced cell death in gastrointestinal adenocarcinoma cells.
- Author
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Zhang, Yubin, Adachi, Masaaki, Zhao, Xudong, Kawamura, Rina, and Imai, Kohzoh
- Published
- 2004
- Full Text
- View/download PDF
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