J. Wang

Harbin Institute of Technology

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Elvira Fortunato

Universidade Nova de Lisboa

Fangfa Fu

Harbin Institute of Technology

Chengxin Zhao

Institute of Modern Physics

Rodrigo Martins

Universidade Nova de Lisboa

Q. Wang

Jiangsu University of Science and Technology

M. Peres

Instituto de Engenharia de Sistemas e Computadores Microsistemas e Nanotecnologias

Y. Wang

Fudan University

E. Elangovan

SRM Institute of Science and Technology

Yansong Wang

Northeast Forestry University

Frans Munnik

Helmholtz-Zentrum Dresden-Rossendorf

Cooperative Institutions

Harbin Institute of Technology

Chinese Academy of Sciences

University of Lisbon

Institute of Modern Physics

University of Chinese Academy of Sciences

Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento

Instituto Politécnico de Lisboa

Instituto Superior Técnico

Centre National de la Recherche Scientifique

Instituto de Engenharia de Sistemas e Computadores Microsistemas e Nanotecnologias

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Exploration of Aflatoxin B1 Degradation Products via Kocuria rosea: Structure Elucidation and Toxicity Analysis

Applied Sciences (2024)

J. Wang Jun Nan Qiqi Chen Ying Zhou Xiujun Gao

Aflatoxin B1, a natural mycotoxin produced by Aspergillus fungi with high toxicity and carcinogenicity to humans and animals, has attracted more and more attention in the past 40 years. In the study of the biological detoxification of aflatoxin B1—although it has been confirmed that Kocuria rosea has the ability to efficiently remove aflatoxin B1—the degradation products, degradation pathways, and toxicity of the degradation products of aflatoxin B1 have not been clarified. Therefore, in this study, it was found that the functional groups of aflatoxin B1 changed after being cultured with Kocuria rosea, indicating the production of aflatoxin B1 degradation products. Ten main AFB1 degradation products (including aflatoxicol, aflatoxin D1, and aflatoxin D2) were identified, and their structures and fragmentation mechanisms were further elucidated by the parent ions and fragment ions of the products. The possible degradation pathway of aflatoxin B1 was proposed according to the structure of the degradation products. Additionally, the toxicity of the degradation products was analyzed according to the quantitative structure–activity relationship theory, and cytotoxicity experiments and dead–live cell staining experiments showed that the toxicity of the degradation products was significantly less than that of aflatoxin B1. In this study, the mechanism of aflatoxin B1 degradation by Kocuria rosea was explored from several perspectives, indicating that aflatoxin B1 degradation by Kocuria rosea is a promising biological method.

10.3390/app142311024

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Structural and optical properties of nitrogen doped ZnO films

Vacuum (2009)

E. Alves N. Franco N.P. Barradas Frans Munnik T. Monteiro

Elastic recoil detection

Rutherford backscattering spectrometry

10.1016/j.vacuum.2009.03.022

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Citations (11)

Study on Tensile Property and Fracture of Welded Joint of Ti-6.5Al-2Zr-1Mo-1V Alloy by Hydrogen Processing

Materials science forum (2010)

Q. Wang Dong Sun Hui Yang J. Wang

The microstructural evolution of TIG welded joint in Ti-6.5Al-2Zr-1Mo-1V alloy treated by thermo hydrogen processing was investigated by optical microscopy, transmission electron microscopy and scanning electronic microscopy and the mechanical properties of welded joints were tested and analysed. The results showed that δ-hydride formed after hydrogenising at 700°C for 3 hours, and it is a face-centered cubic crystal. And these hydrides brought a strong fuzzy effect on microstructure. A lot of rhombic martensite phase α" generated in the area of welded joint. Metastable β(H) phase and α" phase were gradually decomposed to α and δ phases during aging. Hydrides were dissolved, the hydrogen was removed from the alloy and the recrystallization occurred in the process of annealing in vacuum. After hydrogen treatment, the refinement effect of grains in the fusion area was very obviously, that is, coarse columnar grains changed to finer equiaxed grains. Non-equilibrium phase reduced in grains. After hydrogen treatment (hydrogenization at 700°C for 3 hours, eutectoid at 300°C for 8 hours and annealing at 750°C for 8 hours in vacuum), the tensile strength of welded samples increased by 25.7%, and the elongation increased by 37.6% compared with welded samples without hydrogen treatment. After hydrogen treatment, the surface morphology of tensile fracture was relative flatness.

Equiaxed crystals

10.4028/www.scientific.net/msf.654-656.883

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Effect of substrate temperature on the properties of pyrolytically deposited nitrogen-doped zinc oxide thin films

Materials Science and Engineering B (2012)

S. Golshahi Seyed Mohammad Rozati A.M. Botelho do Rego J. Wang E. Elangovan

10.1016/j.mseb.2012.10.021

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Design of a cyclic column-parallel ADC for Monolithic Active Pixel Sensor

Journal of Instrumentation (2020)

Yansong Wang Wen Yan Wei Lü Hai Wang Ying Wang

This paper describes a 5-bit cyclic column-parallel ADC for Monolithic Active Pixel Sensor. The column-parallel ADC combines the dedicated sample phase and the signal conversion phase into a single phase. Moreover, it has a high tolerance to the offset of the comparators in the ADC by generating 1.5 bit in every stage. Each column-parallel ADC covers a small area of 100 μm × 200 μm, consumes 4.5 mW at 3.3 V supply and provides the sampling rate of 10 MS/s with the dynamic range of 1000 mV. The results show that the ADC has a signal-to-noise and distortion ratio (SNDR) of 28.47 dB. Its DNL and INL are −0.039/0.055 LSB and −0.048/0.095 LSB, respectively.

12-bit

SIGNAL (programming language)

10.1088/1748-0221/15/02/c02004

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Design of a fast-stop centroid finder for Monolithic Active Pixel Sensor

Journal of Instrumentation (2019)

Y. Wang Fangfa Fu Y. Wang J. Wang Fangxing Lai

The heavy-ion experiments at the Heavy Ion Research Facility in Lanzhou (HIRFL) and the future High-Intensity Heavy-Ion Accelerator Facility (HIAF) in China drives the development of Monolithic Active Pixel Sensor (MAPS) for particle tracking detectors. To reduce the data volume from the MAPS based detectors, a centroid finder that can calculate the geometric centroid of the region of the energy deposition quickly has been designed. The centroid calculation is realized by distance screening among the coordinates of the pixels in the fired region. Performance study with the data from heavy-ion experiments in HIRFL proves that the centroid finder can accurately find the centroids and reduce the data volume from the MAPS by approximately one order of magnitude.

Centroid

Tracking (education)

10.1088/1748-0221/14/12/c12006

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Citations (2)