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  • IOP Publishing  (23)
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  • IOP Publishing  (23)
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  • 1
    Online Resource
    Online Resource
    Round robin test for height valuation methods, LEL and W/3, in China
    IOP Publishing ; 2020
    In:  Measurement Science and Technology Vol. 31, No. 12 ( 2020-12-01), p. 125010-
    Details
    In: Measurement Science and Technology, IOP Publishing, Vol. 31, No. 12 ( 2020-12-01), p. 125010-
    Abstract: In the field of optical microscopy, height valuations, or calibrations, are critical to ensure accuracy and traceability. Height assessment, however, may be controversial, particularly for measurements on large steps or narrow grooves. Thus, standard setting and instrument operations are essential. In this paper, the limited energy lost (LEL) method, which is a Chinese solution, and the well-known ISO W/3 method were both applied in a two-year round robin test to verify their theoretical compatibility and promote their corresponding applications throughout China. The results show that the LEL method successfully predicted outlier growth for progressively narrowing grooves. In addition, compared with the W/3 method, 71% of the results from 24 measurements showed improved repeatability when applying the LEL method. This paper supports the LEL method with evidence from a large sample, after its original publishing in 2016 and the subsequent publication, as a key part of China’s standard on confocal microscopy, in 2017. These results indicate that dynamic model-based valuation might be the future trend for 3D optical micro-nano metrology.
    Type of Medium: Online Resource
    ISSN: 0957-0233 , 1361-6501
    URL: Article
    DOI: 10.1088/1361-6501/aba6ba
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 1362523-8
    detail.hit.zdb_id: 1011901-2
    SSG: 11
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  • 2
    Online Resource
    Online Resource
    Preparation of double-doped Cu, N-nano-TiO 2 photocatalyst and photocatalytic inactivation of Escherichia coli in ballast water
    IOP Publishing ; 2020
    In:  IOP Conference Series: Earth and Environmental Science Vol. 450, No. 1 ( 2020-02-01), p. 012020-
    Details
    In: IOP Conference Series: Earth and Environmental Science, IOP Publishing, Vol. 450, No. 1 ( 2020-02-01), p. 012020-
    Abstract: With more and more international economic exchanges, ship transport becomes more and more frequent, which further increases the exchange capacity of ship ballast water in different sea areas, thus causing more and more serious marine problems of alien microbial invasion. Therefore, in this paper, on the basis of microbial inactivation of ship ballast water treated by uv irradiation, the influencing factors of its catalytic activity were explored by adding photocatalyst TiO 2 into the bacterial suspension, That is to change the catalytic activity of titanium dioxide noble metal and other modified substances and doping amount. Firstly, the UV-sterilization was used as a control, and the modified photocatalyst nano-TiO 2 was added. It was found that the sterilization rate increased greatly, indicating that the photocatalyst-modified nano-TiO 2 has a very strong reinforcing effect on ultraviolet sterilization. Secondly, the photocatalyst itself was changed. It was found that the amount of photocatalyst nano-TiO 2 had a great influence on UV sterilization. Within a certain range, the more the photocatalyst nano-TiO 2 is, the better the sterilization effect is. Finally, changing the external conditions of the photocatalyst, it was found that the photocatalyst nano-TiO 2 had the best activity at higher temperature (33 °C), alkaline (pH=8.5) or neutral (pH=7.5) and long-wave ultraviolet radiation.
    Type of Medium: Online Resource
    ISSN: 1755-1307 , 1755-1315
    URL: Article
    DOI: 10.1088/1755-1315/450/1/012020
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 2434538-6
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  • 3
    Online Resource
    Online Resource
    The investigation and simulation of the UVOM ballast water treatment device
    IOP Publishing ; 2020
    In:  IOP Conference Series: Earth and Environmental Science Vol. 450, No. 1 ( 2020-02-01), p. 012026-
    Details
    In: IOP Conference Series: Earth and Environmental Science, IOP Publishing, Vol. 450, No. 1 ( 2020-02-01), p. 012026-
    Abstract: The marine environments are threatened by discharged wastewater from ships, especially ballast water. In this study, a novel ballast water treatment device (UVOM) was designed and operated for ballast water treatment. The main process of UVOM consists of membrane filter, venture tubes, the UV catalytic TiO 2 unit and an ozone generator. Salinity, flow rate and UV intensity was investigated for their efforts on process efficiency. Results indicated that salinity cause less effects on the removal efficiency of UVOM, and flow rate and UV intensity played more important roles. For UV intensity of 50 W and the flow rate no more than 200 L/h, and UV intensity of 75 W and the flow rate no more than 400 L/h, the discharged ballast water can meet the D-2 standard. Back propagation neural network (BPNN) was constructed for simulating the process performance, and it can better describe the process with less deviation between predictive values and real values. The deviation of the total bacteria was from 4.14% to 6.16%, and the deviation of E. coli was from 3.6% to 7.2%. In addition, the results showed that the relative importance of flow rate (65.96%) was significantly larger than UV intensity (34.04%).
    Type of Medium: Online Resource
    ISSN: 1755-1307 , 1755-1315
    URL: Article
    DOI: 10.1088/1755-1315/450/1/012026
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 2434538-6
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  • 4
    Online Resource
    Online Resource
    Anticancer effects of DBD plasma-activated saline within different discharge modes
    IOP Publishing ; 2023
    In:  Journal of Physics D: Applied Physics Vol. 56, No. 34 ( 2023-08-24), p. 345205-
    Details
    In: Journal of Physics D: Applied Physics, IOP Publishing, Vol. 56, No. 34 ( 2023-08-24), p. 345205-
    Abstract: With a change in ambient temperature and discharge power, air discharge plasma can switch between two typical modes, namely the ozone mode and the NO x mode. Here, we analyze the physicochemical properties and anticancer effects of air dielectric barrier discharge (DBD) plasma-activated saline (PAS) treated by ozone-riched gas produced in an ozone discharge mode, NO x -riched gas produced in a NO x discharge mode, and a mixture of both produced in the combined two modes simultaneously. The results show that gaseous and aqueous reactive oxygen species (ROS) and reactive nitrogen species (RNS) generated by plasma vary in different discharge modes, correlating to the amount of high-valance nitroxides. In the ozone mode, ozone and minor N 2 O 5 are generated in the gaseous phase and are transformed to aqueous ROS and RNS. In the NO x mode, low-valance RNS are generated in the gaseous phase but are transformed into less aqueous RNS. For the PAS produced by the mixed gases, not only the highest concentrated ROS are generated, but also the most abundant gaseous high-valence RNS are produced and transformed to aqueous RNS in the saline. In vitro experiments reveal that, although A375 cells incubated with these three PASs (30%) could all inhibit their viability by enhancing intracellular oxidative stress and inducing cell apoptosis, the PAS produced by the mixed gases has the strongest anticancer effects. Further studies suggest that high-valence RNS play a key role in PAS-induced anticancer effects.
    Type of Medium: Online Resource
    ISSN: 0022-3727 , 1361-6463
    URL: Article
    DOI: 10.1088/1361-6463/acd0bb
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2023
    detail.hit.zdb_id: 209221-9
    detail.hit.zdb_id: 1472948-9
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  • 5
    Online Resource
    Online Resource
    Evaluation of the transdermal permeation and anticancer effects of plasma-activated Aristoflex AVC hydrogel in an artificial skin model
    IOP Publishing ; 2023
    In:  Journal of Physics D: Applied Physics Vol. 56, No. 26 ( 2023-06-29), p. 265202-
    Details
    In: Journal of Physics D: Applied Physics, IOP Publishing, Vol. 56, No. 26 ( 2023-06-29), p. 265202-
    Abstract: Plasma-activated hydrogels have promising application prospects in the field of transdermal penetration therapy, such as subcutaneous tumours, due to their long-lasting, slow-release properties and ability to be easily applied to skin. In this study, surface air plasma was used to prepare plasma-activated Aristoflex AVC hydrogel (PAH) and plasma-activated water (PAW) by irradiation. The characteristics of PAH and PAW were further studied in terms of reactive oxygen species (ROS) storage, transdermal permeation, and in vitro anticancer effects in an artificial skin model. The experimental results showed that PAH had a prolonged storage time of ROS and more transdermal permeation of ROS through artificial skin in Franz diffusion cell after 30 h compared to PAW, which means PAH could be superior to PAW for long-term applications on the skin surface. The in vitro anticancer effects of PAH in an artificial skin model were also better than those of PAW, reducing the viability of A375 cells without causing damage to HaCaT cells. Our study shows that PAH is superior to PAW in body-surface coating applications and can be used for subcutaneous anticancer applications.
    Type of Medium: Online Resource
    ISSN: 0022-3727 , 1361-6463
    URL: Article
    DOI: 10.1088/1361-6463/acca2d
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2023
    detail.hit.zdb_id: 209221-9
    detail.hit.zdb_id: 1472948-9
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  • 6
    Online Resource
    Online Resource
    Photoisomerization and ultrasensitive fluorescence detection of toxic deoxyguanosine adduct AN dG: a theoretical study
    IOP Publishing ; 2022
    In:  Journal of Physics D: Applied Physics Vol. 55, No. 47 ( 2022-11-24), p. 475401-
    Details
    In: Journal of Physics D: Applied Physics, IOP Publishing, Vol. 55, No. 47 ( 2022-11-24), p. 475401-
    Abstract: The toxic deoxyguanosine adduct ( AN dG) is one of the most representative carcinogenic DNA adducts, resulting from human exposure to aromatic amine (AA). Accordingly, the ultrasensitive detection of AA-derived adduct in DNA with minimal disturbance to the native structures is key to elucidating carcinogenesis mechanisms and mitigating cancer risk. Considering the lack of adequate intrinsic optical emission in two obtained rotamers ( AN G1 and AN G2), a set of quasi-intrinsic fluorescent probes based on the complementary cytosine are proposed to identify covalent G-adduct. It is found that the expanded C-analogues in solution could bring red-shifted absorption maxima and enhanced photoluminescence due to the additional π -conjugation. In particular, because PhpC possesses large Stokes shift (98 nm) and the highest fluorescence intensity ( f flu. = 0.546) in emission, it is proposed as the biosensor to monitor the optical changes in the presence and absence of the considered AN G. Compared with native C base, the absorption maximum of PhpC is red-shifted by 145 nm, which contributes to the selective excitation after incorporating into the nucleic acids. More importantly, the fluorescence is insensitive to base pairing with natural guanine, while the efficient fluorescence quenching is observed after pairing with AN G1/ AN G2 as a result of the obvious excited state intermolecular charge transfer. To evaluate the direct application of the bright C-analogues with a high selectivity for deoxyguanosine adduct AN dG in DNA, we further examined the effect of linking deoxyribose on absorption and fluorescence emission, which are consistent with the experimental data.
    Type of Medium: Online Resource
    ISSN: 0022-3727 , 1361-6463
    URL: Article
    DOI: 10.1088/1361-6463/ac9484
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 209221-9
    detail.hit.zdb_id: 1472948-9
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  • 7
    Online Resource
    Online Resource
    Analysis of Desulfurization Characteristics in Coal-Fired Power Plant by Numerical Simulation and Computer Simulation
    IOP Publishing ; 2021
    In:  Journal of Physics: Conference Series Vol. 2033, No. 1 ( 2021-09-01), p. 012063-
    Details
    In: Journal of Physics: Conference Series, IOP Publishing, Vol. 2033, No. 1 ( 2021-09-01), p. 012063-
    Type of Medium: Online Resource
    ISSN: 1742-6588 , 1742-6596
    URL: Article
    DOI: 10.1088/1742-6596/2033/1/012063
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 2166409-2
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  • 8
    Online Resource
    Online Resource
    Controlled synthesis of 3D urchinlike niobium tungsten oxide nanostructure for fast hydrogen ion storage
    IOP Publishing ; 2023
    In:  Journal of Physics D: Applied Physics Vol. 56, No. 18 ( 2023-05-04), p. 185501-
    Details
    In: Journal of Physics D: Applied Physics, IOP Publishing, Vol. 56, No. 18 ( 2023-05-04), p. 185501-
    Abstract: The shear crystal structure through metal doping can effectively promote the transport speed of ions and electrons in metal oxides, which has important dynamic significance for the design of high-performance energy storage materials. Herein, a 3D urchinlike niobium tungsten oxide (NWO) nanostructure as an efficient hydrogen ion storage material is reported for the first time, which exhibits a capacity of 88mAh g −1 at 20 °C (1 °C = 100 mA g −1 ). The large specific capacity of the 3D urchinlike NWO nanostructure is ascribed to the reversible reaction of a great quantity of W 6+ , W 5+ and W 4+ in the process of protonation and deprotonation processes. In addition, hydrogen ions can still be stored in large and stable quantities, even at rates as high as 100 °C (75 mAh g −1 at 100 °C). The improvement of hydrogen ion storage properties is arising from an optimized morphology of niobium tungsten oxide via tuning of the crystal structure. The high specific superficial area 3D urchinlike shape with rich one-dimensional nanostructures significantly shortens charge-carrier transport distances, ensuring rapid interfacial electronics movement to polish up ion storage kinetics. Consequently, this crystallographic shear structure strategy to boost hydrogen ion storage capacity may be universal and is likely to pave the way toward highly capacity hydrogen ion energy storage systems.
    Type of Medium: Online Resource
    ISSN: 0022-3727 , 1361-6463
    URL: Article
    DOI: 10.1088/1361-6463/acbc87
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2023
    detail.hit.zdb_id: 209221-9
    detail.hit.zdb_id: 1472948-9
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  • 9
    Online Resource
    Online Resource
    Effect of post oxidation annealing in nitric oxide on interface properties of 4H-SiC/SiO 2 after high temperature oxidation
    IOP Publishing ; 2015
    In:  Journal of Semiconductors Vol. 36, No. 9 ( 2015-09), p. 094003-
    Details
    In: Journal of Semiconductors, IOP Publishing, Vol. 36, No. 9 ( 2015-09), p. 094003-
    Type of Medium: Online Resource
    ISSN: 1674-4926
    URL: Article
    DOI: 10.1088/1674-4926/36/9/094003
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2015
    detail.hit.zdb_id: 2484682-X
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  • 10
    Online Resource
    Online Resource
    A new fast corner detection method based on template matching
    IOP Publishing ; 2019
    In:  IOP Conference Series: Materials Science and Engineering Vol. 563, No. 5 ( 2019-07-01), p. 052093-
    Details
    In: IOP Conference Series: Materials Science and Engineering, IOP Publishing, Vol. 563, No. 5 ( 2019-07-01), p. 052093-
    Abstract: Corner detection is the basic link of camera calibration, and its detection accuracy will directly affect the accuracy of camera calibration. In order to improve the extraction precision of the corners of the board, this paper put forward a new checkerboard corner detection method. Two kinds of corner point prototype templates are constructed by using the characteristics of the checkerboard. The similarity between the pixel points and the corner points is calculated by convolution of the convolution kernel and the image. The degree of similarity is used to distinguish the corner points from the non-corner points. The non-maximum suppression algorithm and the gradient statistical algorithm further screen out the target corner points. The experimental results show that the method used in this paper can accurately and quickly detect the corner position and has strong anti-interference ability.
    Type of Medium: Online Resource
    ISSN: 1757-8981 , 1757-899X
    URL: Article
    DOI: 10.1088/1757-899X/563/5/052093
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2019
    detail.hit.zdb_id: 2506501-4
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