The Experts below are selected from a list of 30 Experts worldwide ranked by ideXlab platform
Feipeng Jiao - One of the best experts on this subject based on the ideXlab platform.
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Super-hydrophobic and super-lipophilic functionalized graphene oxide/polyurethane sponge applied for oil/water separation
Chinese Journal of Chemical Engineering, 2018Co-Authors: Huiwen Meng, Tao Yan, Feipeng JiaoAbstract:Abstract Nowadays, oil spills have led to a serious environmental crisis of the world. To deal with this problem, inspired from super-hydrophobic lotus leaf, this study fabricated super-hydrophobic and super-lipophilic functionalized graphene oxide/polyurethane (FGP) sponge by a simple and inexpensive dip coating method. The resulting FGP sponge was characterized by infrared spectroscopy, X-ray diffraction, scanning electron microscopy and water contact angle. The results expressed that FGP sponge exhibited a similar surface structure to that of a lotus leaf, and possessed the super-hydrophobic characteristic with the water contact angle (WAC) of 152° ± 1°. The absorption capacity and reusability were also investigated. It can be seen that, the FGP sponge can remove a wide range of oils and organic solvents from water with good absorption capacities (up to 35 times of its own mass). Significantly, after 10 cycles the absorption capacity of the oils and organic solvents was higher than 90% for the reused FGP sponge, demonstrating the good reusability of the FGP sponge. Therefore, this study probably provided a simple way to remove the pollutions of oil spills and Toxic Organism from water.
Seo Y - One of the best experts on this subject based on the ideXlab platform.
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Use of sodium transfer tissue biosensor (STTB) for monitoring of marine Toxic Organism.
Journal of environmental biology, 2004Co-Authors: Young-chae Song, Seo YAbstract:A highly sensitive sodium (Na+) transfer tissue biosensor (STTB) was designed using a frog bladder membrane to measure paralytic shellfish poisons (PSP). The STTB consists, of a Na+ electrode covered by the membrane, which was then integrated into a flow-through system for continuous measurements. In the absence of Na+ channel blocker, active transfer of Na+ occurred from inside to outside across the frog membrane. When the STTB was used to measure the Na+ -dependent dissociation of PSP, it was able to detect PSB at a level contained in a single cell. However, 5 fg or higher (100 cells or more) is needed for accurate and reproducible measurements. The Toxicity obtained by the STTB was significantly correlated (r = 0.9449) to that determined by the HPLC. Therefore, the simple method of the STTB can be used not only to detect a low level PSP in Toxic plankton populations, but also to monitor poisons in shellfish.
Huiwen Meng - One of the best experts on this subject based on the ideXlab platform.
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Super-hydrophobic and super-lipophilic functionalized graphene oxide/polyurethane sponge applied for oil/water separation
Chinese Journal of Chemical Engineering, 2018Co-Authors: Huiwen Meng, Tao Yan, Feipeng JiaoAbstract:Abstract Nowadays, oil spills have led to a serious environmental crisis of the world. To deal with this problem, inspired from super-hydrophobic lotus leaf, this study fabricated super-hydrophobic and super-lipophilic functionalized graphene oxide/polyurethane (FGP) sponge by a simple and inexpensive dip coating method. The resulting FGP sponge was characterized by infrared spectroscopy, X-ray diffraction, scanning electron microscopy and water contact angle. The results expressed that FGP sponge exhibited a similar surface structure to that of a lotus leaf, and possessed the super-hydrophobic characteristic with the water contact angle (WAC) of 152° ± 1°. The absorption capacity and reusability were also investigated. It can be seen that, the FGP sponge can remove a wide range of oils and organic solvents from water with good absorption capacities (up to 35 times of its own mass). Significantly, after 10 cycles the absorption capacity of the oils and organic solvents was higher than 90% for the reused FGP sponge, demonstrating the good reusability of the FGP sponge. Therefore, this study probably provided a simple way to remove the pollutions of oil spills and Toxic Organism from water.
Aydogan Ozcan - One of the best experts on this subject based on the ideXlab platform.
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A deep learning-enabled portable imaging flow cytometer for cost-effective, high-throughput, and label-free analysis of natural water samples
Light: Science & Applications, 2018Co-Authors: Zoltán Gӧrӧcs, Miu Tamamitsu, Vittorio Bianco, Patrick Wolf, Shounak Roy, Koyoshi Shindo, Kyrollos Yanny, Hatice Ceylan Koydemir, Yair Rivenson, Aydogan OzcanAbstract:We report a deep learning-enabled field-portable and cost-effective imaging flow cytometer that automatically captures phase-contrast color images of the contents of a continuously flowing water sample at a throughput of 100 mL/h. The device is based on partially coherent lens-free holographic microscopy and acquires the diffraction patterns of flowing micro-objects inside a microfluidic channel. These holographic diffraction patterns are reconstructed in real time using a deep learning-based phase-recovery and image-reconstruction method to produce a color image of each micro-object without the use of external labeling. Motion blur is eliminated by simultaneously illuminating the sample with red, green, and blue light-emitting diodes that are pulsed. Operated by a laptop computer, this portable device measures 15.5 cm × 15 cm × 12.5 cm, weighs 1 kg, and compared to standard imaging flow cytometers, it provides extreme reductions of cost, size and weight while also providing a high volumetric throughput over a large object size range. We demonstrated the capabilities of this device by measuring ocean samples at the Los Angeles coastline and obtaining images of its micro- and nanoplankton composition. Furthermore, we measured the concentration of a potentially Toxic alga ( Pseudo-nitzschia ) in six public beaches in Los Angeles and achieved good agreement with measurements conducted by the California Department of Public Health. The cost-effectiveness, compactness, and simplicity of this computational platform might lead to the creation of a network of imaging flow cytometers for large-scale and continuous monitoring of the ocean microbiome, including its plankton composition. A portable device that combines holographic imaging with artificial intelligence can rapidly detect potentially harmful algae in ocean water. Aydogan Ozcan, Zoltan Gorocs and colleagues from the University of California Los Angeles in the United States developed an inexpensive flow cytometer that pumps water samples containing tiny marine Organisms, past an LED chip pulsing red, blue, and green light simultaneously. Deep learning algorithms trained to recognize background signals automatically analyze the holographic interference patterns created by the marine Organisms and rapidly generate color images with microscale resolution. Sample throughput is boosted 10-fold over conventional imaging flow cytometry by avoiding the use of lenses. Using a lightweight and inexpensive prototype, the team monitored plankton levels at six public beaches and detected a likely Toxic Organism, the algae Pseudo-nitzschia, at levels matching those from public health laboratories.
Young-chae Song - One of the best experts on this subject based on the ideXlab platform.
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Use of sodium transfer tissue biosensor (STTB) for monitoring of marine Toxic Organism.
Journal of environmental biology, 2004Co-Authors: Young-chae Song, Seo YAbstract:A highly sensitive sodium (Na+) transfer tissue biosensor (STTB) was designed using a frog bladder membrane to measure paralytic shellfish poisons (PSP). The STTB consists, of a Na+ electrode covered by the membrane, which was then integrated into a flow-through system for continuous measurements. In the absence of Na+ channel blocker, active transfer of Na+ occurred from inside to outside across the frog membrane. When the STTB was used to measure the Na+ -dependent dissociation of PSP, it was able to detect PSB at a level contained in a single cell. However, 5 fg or higher (100 cells or more) is needed for accurate and reproducible measurements. The Toxicity obtained by the STTB was significantly correlated (r = 0.9449) to that determined by the HPLC. Therefore, the simple method of the STTB can be used not only to detect a low level PSP in Toxic plankton populations, but also to monitor poisons in shellfish.