The Experts below are selected from a list of 27990 Experts worldwide ranked by ideXlab platform
Bin Ding - One of the best experts on this subject based on the ideXlab platform.
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slip effect functional air filter for efficient purification of pm2 5
Scientific Reports, 2016Co-Authors: Xinglei Zhao, Shan Wang, Jianyong Yu, Bin DingAbstract:Fabrication of air filtration materials (AFM) that allow air to easily flow through while retaining particles is a significant and urgent need due to the harmful airborne particulate matter pollution; however, this is still a challenging research area. Herein, we report novel slip-effect functional nanofibrous membranes with decreased air resistance (reduction rate of 40%) due to the slip flow of air molecules on the periphery of nanofibers. This was achieved through careful control over the diameters of electrospun polyacrylonitrile fibers and Aperture Size of fiber assembly. Fiber assembly with 86% of fiber diameters between 60–100 nm was found to be most effective for slip flow, as these diameters are close to the mean free path of air molecules (65.3 nm). Significantly, an equilibrium factor τ = df/d2 has been introduced to elucidate the effect of distance of adjacent fibers on the drag force of airflow. Furthermore, the most effective Aperture Size (>3.5 μm) for slip-effect has been determined. Ultimately, the new material displayed low air resistance of 29.5 Pa, high purification efficiency of 99.09%, good transmittance of 77%, and long service life. The successful fabrication of such materials can facilitate the development of high-performance AFMs for various applications.
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slip effect functional air filter for efficient purification of pm 2 5
Scientific Reports, 2016Co-Authors: Xinglei Zhao, Shan Wang, Xia Yin, Bin DingAbstract:Fabrication of air filtration materials (AFM) that allow air to easily flow through while retaining particles is a significant and urgent need due to the harmful airborne particulate matter pollution; however, this is still a challenging research area. Herein, we report novel slip-effect functional nanofibrous membranes with decreased air resistance (reduction rate of 40%) due to the slip flow of air molecules on the periphery of nanofibers. This was achieved through careful control over the diameters of electrospun polyacrylonitrile fibers and Aperture Size of fiber assembly. Fiber assembly with 86% of fiber diameters between 60–100 nm was found to be most effective for slip flow, as these diameters are close to the mean free path of air molecules (65.3 nm). Significantly, an equilibrium factor τ = df/d2 has been introduced to elucidate the effect of distance of adjacent fibers on the drag force of airflow. Furthermore, the most effective Aperture Size (>3.5 μm) for slip-effect has been determined. Ultimately, the new material displayed low air resistance of 29.5 Pa, high purification efficiency of 99.09%, good transmittance of 77%, and long service life. The successful fabrication of such materials can facilitate the development of high-performance AFMs for various applications.
Baoshan Huang - One of the best experts on this subject based on the ideXlab platform.
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laboratory investigation of particle Size effects on the shear behavior of aggregate geogrid interface
Construction and Building Materials, 2018Co-Authors: Bingye Han, Jianming Ling, Xiang Shu, Hongren Gong, Baoshan HuangAbstract:Abstract As an effective method to explore the interaction mechanism between aggregate particles and geogrids, a large-scale direct shear test was employed to study the shear behavior of aggregate-geogrid interface and the effects of particle Size on the interfacial shear strength. Two types of geogrids with rectangular or triangular Aperture and three single-Sized coarse aggregates, 12.5–19 mm, 19–25 mm, 25–37.5 mm, were tested in this study. Multiple parameters were employed to investigate the reinforcement of geogrids in aggregate, including peak shear strength, residual shear strength, vertical displacement and interfacial shear strength efficiency coefficient, α. Results show that the values of α ranged from 0.78 to 1.01, and the aggregate-geogrid interface of AGG2 achieved the highest α among the three aggregates, indicating that the 19–25 mm aggregate had the best interlocking effect reinforced with geogrids used in this study. The combinations of geogrids and aggregate exhibited different interaction mechanisms and failure modes. Based on the test results, the method was improved for determining the appropriate geogrid Aperture Size for an aggregate gradation. Effective interlock could be achieved when the ratio of the equivalent Aperture Size to particle diameter was 1.30–1.71 for biaxial geogrids and 1.08–1.43 for triaxial geogrids.
Xinglei Zhao - One of the best experts on this subject based on the ideXlab platform.
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slip effect functional air filter for efficient purification of pm2 5
Scientific Reports, 2016Co-Authors: Xinglei Zhao, Shan Wang, Jianyong Yu, Bin DingAbstract:Fabrication of air filtration materials (AFM) that allow air to easily flow through while retaining particles is a significant and urgent need due to the harmful airborne particulate matter pollution; however, this is still a challenging research area. Herein, we report novel slip-effect functional nanofibrous membranes with decreased air resistance (reduction rate of 40%) due to the slip flow of air molecules on the periphery of nanofibers. This was achieved through careful control over the diameters of electrospun polyacrylonitrile fibers and Aperture Size of fiber assembly. Fiber assembly with 86% of fiber diameters between 60–100 nm was found to be most effective for slip flow, as these diameters are close to the mean free path of air molecules (65.3 nm). Significantly, an equilibrium factor τ = df/d2 has been introduced to elucidate the effect of distance of adjacent fibers on the drag force of airflow. Furthermore, the most effective Aperture Size (>3.5 μm) for slip-effect has been determined. Ultimately, the new material displayed low air resistance of 29.5 Pa, high purification efficiency of 99.09%, good transmittance of 77%, and long service life. The successful fabrication of such materials can facilitate the development of high-performance AFMs for various applications.
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slip effect functional air filter for efficient purification of pm 2 5
Scientific Reports, 2016Co-Authors: Xinglei Zhao, Shan Wang, Xia Yin, Bin DingAbstract:Fabrication of air filtration materials (AFM) that allow air to easily flow through while retaining particles is a significant and urgent need due to the harmful airborne particulate matter pollution; however, this is still a challenging research area. Herein, we report novel slip-effect functional nanofibrous membranes with decreased air resistance (reduction rate of 40%) due to the slip flow of air molecules on the periphery of nanofibers. This was achieved through careful control over the diameters of electrospun polyacrylonitrile fibers and Aperture Size of fiber assembly. Fiber assembly with 86% of fiber diameters between 60–100 nm was found to be most effective for slip flow, as these diameters are close to the mean free path of air molecules (65.3 nm). Significantly, an equilibrium factor τ = df/d2 has been introduced to elucidate the effect of distance of adjacent fibers on the drag force of airflow. Furthermore, the most effective Aperture Size (>3.5 μm) for slip-effect has been determined. Ultimately, the new material displayed low air resistance of 29.5 Pa, high purification efficiency of 99.09%, good transmittance of 77%, and long service life. The successful fabrication of such materials can facilitate the development of high-performance AFMs for various applications.
Surendra Singh - One of the best experts on this subject based on the ideXlab platform.
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diffraction of orbital angular momentum carrying optical beams by a circular Aperture
Optics Letters, 2014Co-Authors: Anindya Ambuj, Reeta Vyas, Surendra SinghAbstract:Far field diffraction of Laguerre–Gauss vortex (LGV) beams of different angular momentum index by a circular Aperture placed at different locations with respect to incident beam waist is studied experimentally. The experiments reveal a surprisingly simple structure for the diffraction pattern and its dependence on the orbital angular momentum index of the incident beam when the Aperture Size is small compared to the beam radius.
G A Freed - One of the best experts on this subject based on the ideXlab platform.
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a new mechanism for the regulation of stomatal Aperture Size in intact leaves accumulation of mesophyll derived sucrose in the guard cell wall of vicia faba
Plant Physiology, 1997Co-Authors: W H Outlaw, B G Smith, G A FreedAbstract:At various times after pulse-labeling broad bean (Vicia faba L.) leaflets with 14CO2, whole-leaf pieces and rinsed epidermal peels were harvested and subsequently processed for histochemical analysis. Cells dissected from whole leaf retained apoplastic contents, whereas those from rinsed peels contained only symplastic contents. Sucrose (Suc)-specific radioactivity peaked (111 GBq mol-1) in palisade cells at 20 min. In contrast, the 14C content and Sucspecific radioactivity were very low in guard cells for 20 min, implying little CO2 incorporation; both then peaked at 40 min. The guard-cell apoplast had a high maximum Suc-specific radioactivity (204 GBq mol-1) and a high Suc influx rate (0.05 pmol stoma-1 min-1). These and other comparisons implied the presence of (a) multiple Suc pools in mesophyll cells, (b) a localized mesophyll-apoplast region that exchanges with phloem and stomata, and (c) mesophyll-derived Suc in guard-cell walls sufficient to diminish stomatal opening by approximately 3 [mu]m. Factors expected to enhance Suc accumulation in guard-cell walls are (a) high transpiration rate, which closes stomata, and (b) high apoplastic Suc concentration, which is elevated when mesophyll Suc efflux exceeds translocation. Therefore, multiple physiological factors are integrated in the attenuation of stomatal Aperture Size by this previously unrecognized mechanism.