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  1. Article ; Online: High-Precision Photoacoustic Nitrogen Dioxide Gas Analyzer for Fast Dynamic Measurement.

    Qi, Hongchao / Zhang, Guangyin / Xu, Lin / Yang, Ling / Wang, Zhengzhi / Xu, Yufu / Chen, Ke

    Analytical chemistry

    2024  Volume 96, Issue 3, Page(s) 1354–1361

    Abstract: A high-precision photoacoustic (PA) gas analyzer for fast dynamic measurement of ambient nitrogen dioxide ( ... ...

    Abstract A high-precision photoacoustic (PA) gas analyzer for fast dynamic measurement of ambient nitrogen dioxide (NO
    Language English
    Publishing date 2024-01-09
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1508-8
    ISSN 1520-6882 ; 0003-2700
    ISSN (online) 1520-6882
    ISSN 0003-2700
    DOI 10.1021/acs.analchem.3c05084
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 4033: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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  2. Article ; Online: Rapid Photoacoustic Exhaust Gas Analyzer for Simultaneous Measurement of Nitrogen Dioxide and Sulfur Dioxide.

    Qi, Hongchao / Zhao, Xinyu / Xu, Yufu / Yang, Ling / Liu, Junjun / Chen, Ke

    Analytical chemistry

    2024  Volume 96, Issue 13, Page(s) 5258–5264

    Abstract: A rapid photoacoustic (PA) exhaust gas analyzer is presented for simultaneous measurements of nitrogen dioxide ( ... ...

    Abstract A rapid photoacoustic (PA) exhaust gas analyzer is presented for simultaneous measurements of nitrogen dioxide (NO
    Language English
    Publishing date 2024-03-19
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1508-8
    ISSN 1520-6882 ; 0003-2700
    ISSN (online) 1520-6882
    ISSN 0003-2700
    DOI 10.1021/acs.analchem.3c05936
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 4033: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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  3. Article ; Online: High-Precision Multipass Fiber-Optic Photoacoustic Gas Analyzer Based on 2

    Xu, Yufu / Wang, Heng / Qi, Hongchao / Zhao, Xinyu / Guo, Min / Zhang, Yajie / Li, Chenxi / Chen, Ke

    Analytical chemistry

    2024  Volume 96, Issue 6, Page(s) 2543–2549

    Abstract: A self-calibration fiber-optic photoacoustic (PA) gas analyzer based on ... ...

    Abstract A self-calibration fiber-optic photoacoustic (PA) gas analyzer based on 2
    Language English
    Publishing date 2024-02-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1508-8
    ISSN 1520-6882 ; 0003-2700
    ISSN (online) 1520-6882
    ISSN 0003-2700
    DOI 10.1021/acs.analchem.3c04951
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 4033: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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  4. Article: Integrated near-infrared fiber-optic photoacoustic sensing demodulator for ultra-high sensitivity gas detection.

    Zhao, Xinyu / Li, Chenxi / Qi, Hongchao / Huang, Jiayu / Xu, Yufu / Wang, Zhengzhi / Han, Xiao / Guo, Min / Chen, Ke

    Photoacoustics

    2023  Volume 33, Page(s) 100560

    Abstract: An integrated near-infrared fiber-optic photoacoustic sensing demodulator was established for ultra-high sensitivity gas detection. The demodulator has capacities of interference spectrum acquisition and calculation, laser modulation control as well as ... ...

    Abstract An integrated near-infrared fiber-optic photoacoustic sensing demodulator was established for ultra-high sensitivity gas detection. The demodulator has capacities of interference spectrum acquisition and calculation, laser modulation control as well as digital lock-in amplification. FPGA was utilized to realize all the control and signal processing functions, which immensely improved the integration and stability of the system. The photoacoustic signal detection based on fiber-optic Fabry-Perot (F-P) acoustic sensor was realized by applying ultra-high resolution spectral demodulation technique. The detectable frequency of photoacoustic signal achieved 10 kHz. The system integrated lock-in amplification technology, which made the noise sound pressure and dynamic response range of sound pressure detection reached 3.7 μPa/√Hz @1 kHz and 142 dB, respectively. The trace C
    Language English
    Publishing date 2023-09-20
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2716706-9
    ISSN 2213-5979
    ISSN 2213-5979
    DOI 10.1016/j.pacs.2023.100560
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Silicon-Cantilever-Enhanced Single-Fiber Photoacoustic Acetylene Gas Sensor.

    Zhang, Zhengyuan / Fan, Xinhong / Xu, Yufu / Wang, Yongqi / Tang, Yiyao / Zhao, Rui / Li, Chenxi / Wang, Heng / Chen, Ke

    Sensors (Basel, Switzerland)

    2023  Volume 23, Issue 17

    Abstract: A single-fiber photoacoustic (PA) sensor with a silicon cantilever beam for trace acetylene ( ... ...

    Abstract A single-fiber photoacoustic (PA) sensor with a silicon cantilever beam for trace acetylene (C
    Language English
    Publishing date 2023-09-03
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2052857-7
    ISSN 1424-8220 ; 1424-8220
    ISSN (online) 1424-8220
    ISSN 1424-8220
    DOI 10.3390/s23177644
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Dynamic detection of ppb-level SO

    Zhao, Xinyu / Qi, Hongchao / Xu, Yufu / Li, Chenxi / Guo, Min / Zhao, Jikuan / Cui, Dongyu / Chen, Ke

    Optics letters

    2023  Volume 48, Issue 17, Page(s) 4558–4561

    Abstract: We design a photoacoustic (PA) ... ...

    Abstract We design a photoacoustic (PA) SO
    Language English
    Publishing date 2023-07-15
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4794
    ISSN (online) 1539-4794
    DOI 10.1364/OL.498908
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Seasonal variations in the diversity and benthic community structure of subtidal artificial oyster reefs adjacent to the Luanhe River Estuary, Bohai Sea.

    Xu, Min / Xu, Yufu / Yang, Jisong / Li, Jiaxing / Zhang, Haipeng / Xu, Kaida / Zhang, Yunling / Otaki, Takayoshi / Zhao, Qi / Zhang, Yi / Yin, Zengqiang / Komatsu, Teruhisa

    Scientific reports

    2023  Volume 13, Issue 1, Page(s) 17650

    Abstract: Artificial oyster reefs provide important spawning and nursery grounds for a variety of fishes and large mobile crustaceans. Between July 2016 and May 2017, seasonal surveys of species composition and community structure were performed in the artificial ... ...

    Abstract Artificial oyster reefs provide important spawning and nursery grounds for a variety of fishes and large mobile crustaceans. Between July 2016 and May 2017, seasonal surveys of species composition and community structure were performed in the artificial oyster reef area and control area adjacent to the Luanhe River Estuary in China. During the survey year, 56 species belonging to 50 genera, 45 families, and 19 orders were recorded. The dominant economically important fish and mobile crustaceans were Hexagrammos otakii, Pholis fangi, Sebastes schlegelii, Charybdis japonica, and Oratosquilla oratoria. Resident fishes belonged to the Cynoglossidae, Paralichthyidae, Pleuronectidae, and Gobiidae families. Seasonally important fish species included Lateolabrax japonicus, Konosirus punctatus, Thryssa kammalensis, Hexagrammos agrammus, and Acanthopagrus schlegelii. The ranges of H' values among stations were 1.18-2.16, 0.65-1.75, 1.18-2.06, and 0.62-1.92 in spring, summer, autumn, and winter, respectively. The benthic organisms present in the community of artificial oyster reef areas can be classified into groups according to month and season. The abundance biomass curves showed that the oyster reef area in spring, autumn, and winter experienced low disturbance, whereas the community structure in summer was subject to large variations from external disturbance. We also found that as the age of the oyster reefs increased, the percentage of oysters in the low shell height group (< 40 mm) decreased. The oyster density was 324 ind/m
    MeSH term(s) Humans ; Animals ; Ecosystem ; Seasons ; Estuaries ; Rivers ; Fishes ; Perciformes ; Ostreidae ; Brachyura ; Flounder ; Coral Reefs
    Language English
    Publishing date 2023-10-17
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-023-44176-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Insights into the Mechanism of the Mechanochemical Formation of Metastable Phases.

    Rana, Resham / Long, Daniel / Kotula, Paul / Xu, Yufu / Olson, Dustin / Galipaud, Jules / LeMogne, Thierry / Tysoe, Wilfred T

    ACS applied materials & interfaces

    2021  Volume 13, Issue 5, Page(s) 6785–6794

    Abstract: The mechanochemical reaction kinetics of sulfur with copper to form a metastable copper sulfide phase at room temperature is investigated in ultrahigh vacuum by modifying the properties of the copper during cleaning in vacuum. The measured kinetics is in ...

    Abstract The mechanochemical reaction kinetics of sulfur with copper to form a metastable copper sulfide phase at room temperature is investigated in ultrahigh vacuum by modifying the properties of the copper during cleaning in vacuum. The measured kinetics is in agreement with a theory first proposed by Karthikeyan and Rigney that predicts that the rate depends linearly both on the contact time and on the strain-rate sensitivity of the substrate. The mechanism for this process was investigated using thin samples of copper fabricated using a focused-ion-beam and by measuring the crystal structure and elemental composition of the copper subsurface region by electron microscopy after reaction. The measured sulfur depth distributions produced by shear-induced surface-to-bulk transport were in good agreement with values calculated using rate constants that also model the reaction kinetics. Sulfur was found both in crystalline regions and also concentrated along grain boundaries, implying that formation of metastable phases is facilitated by both the presence of dislocations and by grain boundaries.
    Language English
    Publishing date 2021-01-28
    Publishing country United States
    Document type Journal Article
    ISSN 1944-8252
    ISSN (online) 1944-8252
    DOI 10.1021/acsami.0c18980
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Catalytic pyrolysis and liquefaction behavior of microalgae for bio-oil production.

    Xu, Yufu / Hu, Yuanhua / Peng, Yubin / Yao, Lulu / Dong, Yinghui / Yang, Bingxun / Song, Ruhong

    Bioresource technology

    2019  Volume 300, Page(s) 122665

    Abstract: Microalgae bio-oil production is related to the sustainable use of world energy in the future. In the present work, catalytic pyrolysis and liquefaction behavior of microalgae for bio-oil production were investigated. The results show that the rare earth ...

    Abstract Microalgae bio-oil production is related to the sustainable use of world energy in the future. In the present work, catalytic pyrolysis and liquefaction behavior of microalgae for bio-oil production were investigated. The results show that the rare earth compounds as catalysts contributed to significantly accelerating the pyrolysis of microalgae via reducing the activation energy of pyrolysis process. Ce(II)/HZSM-5 presented the optimal catalytic pyrolysis and liquefaction effects by helping cut the microalgae molecule chains. The maximum bio-oil yield amounted to 49.71 wt% at the catalyst concentration of 5 wt%. The chemical components of the Spirulina bio-oil were composed of carboxylic acids, ketones, olefins, amides, ethers, esters, and partially cyclic N-containing compounds. Although the combustion performances of the Spirulina bio-oil are worse than those of the diesel fuel, it is superior to the reported rice husk bio-oil, suggesting a promising potential application prospect.
    MeSH term(s) Biofuels ; Catalysis ; Hot Temperature ; Microalgae ; Plant Oils ; Polyphenols ; Pyrolysis
    Chemical Substances Bio-Oil ; Biofuels ; Plant Oils ; Polyphenols
    Language English
    Publishing date 2019-12-24
    Publishing country England
    Document type Journal Article
    ZDB-ID 1065195-0
    ISSN 1873-2976 ; 0960-8524
    ISSN (online) 1873-2976
    ISSN 0960-8524
    DOI 10.1016/j.biortech.2019.122665
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    In stock of ZB MED Bonn / Germany

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  10. Article ; Online: Hydrothermal liquefaction of Chlorella pyrenoidosa for bio-oil production over Ce/HZSM-5.

    Xu, Yufu / Zheng, Xiaojing / Yu, Huiqiang / Hu, Xianguo

    Bioresource technology

    2014  Volume 156, Page(s) 1–5

    Abstract: This paper investigated a novel hydrothermal liquefaction process of Chlorella pyrenoidosa catalyzed by Ce/HZSM-5. The chemical groups and components of the residues of C. pyrenoidosa were analyzed by Fourier transform infrared spectrometry and Gas ... ...

    Abstract This paper investigated a novel hydrothermal liquefaction process of Chlorella pyrenoidosa catalyzed by Ce/HZSM-5. The chemical groups and components of the residues of C. pyrenoidosa were analyzed by Fourier transform infrared spectrometry and Gas Chromatograph-Mass Spectrometer. The crystal structure and micro surface topography of C. pyrenoidosa before and after catalytic liquefaction were characterized by X-ray diffraction and Scanning electron microscopy, respectively. The experimental results showed that the catalytic cracking effects of Ce/HZSM-5 were superior to that of HZSM-5 as a liquefaction catalyst of C. pyrenoidosa. Compared with HZSM-5, Ce/HZSM-5 has a significantly enhanced Lewis acid active center, smaller particle size, larger specific surface, and highly dispersed Ce4O7 with trivalent and tetravalent cerium in the zeolite skeleton channel that accelerate the catalytic liquefaction of C. pyrenoidosa. The rare earth modified zeolite Ce/HZSM-5 exhibits good potential and a beneficial nature for the preparation of bio-oil from microalgae with high efficiency.
    MeSH term(s) Biofuels ; Biotechnology/methods ; Catalysis ; Cerium/pharmacology ; Chlorella/drug effects ; Chlorella/metabolism ; Gas Chromatography-Mass Spectrometry ; Microscopy, Electron, Scanning ; Oils/metabolism ; Spectroscopy, Fourier Transform Infrared ; Temperature ; Water/chemistry ; X-Ray Diffraction ; Zeolites/pharmacology
    Chemical Substances Biofuels ; Oils ; Water (059QF0KO0R) ; Zeolites (1318-02-1) ; Cerium (30K4522N6T)
    Language English
    Publishing date 2014-03
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1065195-0
    ISSN 1873-2976 ; 0960-8524
    ISSN (online) 1873-2976
    ISSN 0960-8524
    DOI 10.1016/j.biortech.2014.01.010
    Database MEDical Literature Analysis and Retrieval System OnLINE

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