The Experts below are selected from a list of 7746 Experts worldwide ranked by ideXlab platform
Geoffrey W Coates - One of the best experts on this subject based on the ideXlab platform.
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tunable high performance cross linked alkaline anion exchange membranes for fuel cell applications
Journal of the American Chemical Society, 2010Co-Authors: Nicholas J Robertson, Henry A Kostalik, Timothy J Clark, Paul F Mutolo, Hector D Abruna, Geoffrey W CoatesAbstract:Fuel cells are energy conversion devices that show great potential in numerous applications ranging from automobiles to portable electronics. However, further development of fuel cell components is necessary for them to become commercially viable. One component critical to their performance is the polymer electrolyte membrane, which is an ion Conductive Medium separating the two electrodes. While proton conducting membranes are well established (e.g., Nafion), hydroxide conducting membranes (alkaline anion exchange membranes, AAEMs) have been relatively unexplored by comparison. Operating under alkaline conditions offers significant efficiency benefits, especially for the oxygen reduction reaction; therefore, effective AAEMs could significantly advance fuel cell technologies. Here we demonstrate the use of ring-opening metathesis polymerization to generate new cross-linked membrane materials exhibiting high hydroxide ion conductivity and good mechanical properties. Cross-linking allows for increased ion i...
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tunable high performance cross linked alkaline anion exchange membranes for fuel cell applications
Journal of the American Chemical Society, 2010Co-Authors: Nicholas J Robertso, Henry A Kostalik, Timothy J Clark, Paul F Mutolo, Hector D Abruna, Geoffrey W CoatesAbstract:Fuel cells are energy conversion devices that show great potential in numerous applications ranging from automobiles to portable electronics. However, further development of fuel cell components is necessary for them to become commercially viable. One component critical to their performance is the polymer electrolyte membrane, which is an ion Conductive Medium separating the two electrodes. While proton conducting membranes are well established (e.g., Nafion), hydroxide conducting membranes (alkaline anion exchange membranes, AAEMs) have been relatively unexplored by comparison. Operating under alkaline conditions offers significant efficiency benefits, especially for the oxygen reduction reaction; therefore, effective AAEMs could significantly advance fuel cell technologies. Here we demonstrate the use of ring-opening metathesis polymerization to generate new cross-linked membrane materials exhibiting high hydroxide ion conductivity and good mechanical properties. Cross-linking allows for increased ion incorporation, which, in turn supports high conductivities. This facile synthetic approach enables the preparation of cross-linked materials with the potential to meet the demands of hydrogen-powered fuel cells as well as direct methanol fuel cells.
Si Young Song - One of the best experts on this subject based on the ideXlab platform.
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first clinical trial of the miro capsule endoscope by using a novel transmission technology electric field propagation
Gastrointestinal Endoscopy, 2009Co-Authors: Seungmin Bang, Jeong Youp Park, Seok Jeong, Young Ho Kim, Han Bo Shim, Tae Song Kim, Don Haeng Lee, Si Young SongAbstract:Background We developed a capsule endoscope (CE), "MiRo," with the novel transmission technology of electric-field propagation. The technology uses the human body as a Conductive Medium for data transmission. Specifications of the prototype include the ability to receive real-time images; size, 10.8 × 24 mm; weight, 3.3 g; field of view, 150°; resolution of power, 320 × 320 pixels; and transmittal speed, 2 frames per second. Objective To evaluate the clinical safety and diagnostic feasibility of the prototype MiRo, we conducted a multicenter clinical trial. Design and Patients All volunteers underwent baseline examinations, including EGD and electrocardiography for the screening of GI obstructive and cardiovascular diseases, before the trial. In the first 10 cases, 24-hour Holter monitoring was also performed. To evaluate the diagnostic feasibility, transmission rate of the captured images, inspection rate of the entire small bowel, and quality of transmitted images (graded as outstanding, excellent, good/average, below average, and poor) were analyzed. Results Of the 49 healthy volunteers, 45 were included in the trial, and 4 were excluded because of baseline abnormalities. No adverse effects were noted. All CEs were expelled within 2 days, and the entire small bowel could be explored in all cases. The transmission rates of the captured image in the stomach, small bowel, and colon were 99.5%, 99.6%, and 97.2%, respectively. The mean total duration of image transmission was 9 hours, 51 minutes, and the mean transit time of the entire small bowel was 4 hours, 33 minutes. Image quality was graded as good or better in 41 cases (91.1%). Details of the villi and vascular structures of the entire small bowel were clearly visualized in 31 cases (68.9%). Conclusions MiRo is safe and effective for exploring the entire small bowel, with good image quality and real-time feasibility. This novel transmission technology may have applications beyond the field of capsule endoscopy.
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first clinical trial of the miro capsule endoscope by using a novel transmission technology electric field propagation
Gastrointestinal Endoscopy, 2009Co-Authors: Seungmin Bang, Jeong Youp Park, Seok Jeong, Han Bo Shim, Si Young SongAbstract:BACKGROUND: We developed a capsule endoscope (CE), "MiRo," with the novel transmission technology of electric-field propagation. The technology uses the human body as a Conductive Medium for data transmission. Specifications of the prototype include the ability to receive real-time images; size, 10.8 x 24 mm; weight, 3.3 g; field of view, 150 degrees; resolution of power, 320 x 320 pixels; and transmittal speed, 2 frames per second. OBJECTIVE: To evaluate the clinical safety and diagnostic feasibility of the prototype MiRo, we conducted a multicenter clinical trial. DESIGN AND PATIENTS: All volunteers underwent baseline examinations, including EGD and electrocardiography for the screening of GI obstructive and cardiovascular diseases, before the trial. In the first 10 cases, 24-hour Holter monitoring was also performed. To evaluate the diagnostic feasibility, transmission rate of the captured images, inspection rate of the entire small bowel, and quality of transmitted images (graded as outstanding, excellent, good/average, below average, and poor) were analyzed. RESULTS: Of the 49 healthy volunteers, 45 were included in the trial, and 4 were excluded because of baseline abnormalities. No adverse effects were noted. All CEs were expelled within 2 days, and the entire small bowel could be explored in all cases. The transmission rates of the captured image in the stomach, small bowel, and colon were 99.5%, 99.6%, and 97.2%, respectively. The mean total duration of image transmission was 9 hours, 51 minutes, and the mean transit time of the entire small bowel was 4 hours, 33 minutes. Image quality was graded as good or better in 41 cases (91.1%). Details of the villi and vascular structures of the entire small bowel were clearly visualized in 31 cases (68.9%). CONCLUSIONS: MiRo is safe and effective for exploring the entire small bowel, with good image quality and real-time feasibility. This novel transmission technology may have applications beyond the field of capsule endoscopy.
Seungmin Bang - One of the best experts on this subject based on the ideXlab platform.
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first clinical trial of the miro capsule endoscope by using a novel transmission technology electric field propagation
Gastrointestinal Endoscopy, 2009Co-Authors: Seungmin Bang, Jeong Youp Park, Seok Jeong, Young Ho Kim, Han Bo Shim, Tae Song Kim, Don Haeng Lee, Si Young SongAbstract:Background We developed a capsule endoscope (CE), "MiRo," with the novel transmission technology of electric-field propagation. The technology uses the human body as a Conductive Medium for data transmission. Specifications of the prototype include the ability to receive real-time images; size, 10.8 × 24 mm; weight, 3.3 g; field of view, 150°; resolution of power, 320 × 320 pixels; and transmittal speed, 2 frames per second. Objective To evaluate the clinical safety and diagnostic feasibility of the prototype MiRo, we conducted a multicenter clinical trial. Design and Patients All volunteers underwent baseline examinations, including EGD and electrocardiography for the screening of GI obstructive and cardiovascular diseases, before the trial. In the first 10 cases, 24-hour Holter monitoring was also performed. To evaluate the diagnostic feasibility, transmission rate of the captured images, inspection rate of the entire small bowel, and quality of transmitted images (graded as outstanding, excellent, good/average, below average, and poor) were analyzed. Results Of the 49 healthy volunteers, 45 were included in the trial, and 4 were excluded because of baseline abnormalities. No adverse effects were noted. All CEs were expelled within 2 days, and the entire small bowel could be explored in all cases. The transmission rates of the captured image in the stomach, small bowel, and colon were 99.5%, 99.6%, and 97.2%, respectively. The mean total duration of image transmission was 9 hours, 51 minutes, and the mean transit time of the entire small bowel was 4 hours, 33 minutes. Image quality was graded as good or better in 41 cases (91.1%). Details of the villi and vascular structures of the entire small bowel were clearly visualized in 31 cases (68.9%). Conclusions MiRo is safe and effective for exploring the entire small bowel, with good image quality and real-time feasibility. This novel transmission technology may have applications beyond the field of capsule endoscopy.
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first clinical trial of the miro capsule endoscope by using a novel transmission technology electric field propagation
Gastrointestinal Endoscopy, 2009Co-Authors: Seungmin Bang, Jeong Youp Park, Seok Jeong, Han Bo Shim, Si Young SongAbstract:BACKGROUND: We developed a capsule endoscope (CE), "MiRo," with the novel transmission technology of electric-field propagation. The technology uses the human body as a Conductive Medium for data transmission. Specifications of the prototype include the ability to receive real-time images; size, 10.8 x 24 mm; weight, 3.3 g; field of view, 150 degrees; resolution of power, 320 x 320 pixels; and transmittal speed, 2 frames per second. OBJECTIVE: To evaluate the clinical safety and diagnostic feasibility of the prototype MiRo, we conducted a multicenter clinical trial. DESIGN AND PATIENTS: All volunteers underwent baseline examinations, including EGD and electrocardiography for the screening of GI obstructive and cardiovascular diseases, before the trial. In the first 10 cases, 24-hour Holter monitoring was also performed. To evaluate the diagnostic feasibility, transmission rate of the captured images, inspection rate of the entire small bowel, and quality of transmitted images (graded as outstanding, excellent, good/average, below average, and poor) were analyzed. RESULTS: Of the 49 healthy volunteers, 45 were included in the trial, and 4 were excluded because of baseline abnormalities. No adverse effects were noted. All CEs were expelled within 2 days, and the entire small bowel could be explored in all cases. The transmission rates of the captured image in the stomach, small bowel, and colon were 99.5%, 99.6%, and 97.2%, respectively. The mean total duration of image transmission was 9 hours, 51 minutes, and the mean transit time of the entire small bowel was 4 hours, 33 minutes. Image quality was graded as good or better in 41 cases (91.1%). Details of the villi and vascular structures of the entire small bowel were clearly visualized in 31 cases (68.9%). CONCLUSIONS: MiRo is safe and effective for exploring the entire small bowel, with good image quality and real-time feasibility. This novel transmission technology may have applications beyond the field of capsule endoscopy.
Hector D Abruna - One of the best experts on this subject based on the ideXlab platform.
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tunable high performance cross linked alkaline anion exchange membranes for fuel cell applications
Journal of the American Chemical Society, 2010Co-Authors: Nicholas J Robertson, Henry A Kostalik, Timothy J Clark, Paul F Mutolo, Hector D Abruna, Geoffrey W CoatesAbstract:Fuel cells are energy conversion devices that show great potential in numerous applications ranging from automobiles to portable electronics. However, further development of fuel cell components is necessary for them to become commercially viable. One component critical to their performance is the polymer electrolyte membrane, which is an ion Conductive Medium separating the two electrodes. While proton conducting membranes are well established (e.g., Nafion), hydroxide conducting membranes (alkaline anion exchange membranes, AAEMs) have been relatively unexplored by comparison. Operating under alkaline conditions offers significant efficiency benefits, especially for the oxygen reduction reaction; therefore, effective AAEMs could significantly advance fuel cell technologies. Here we demonstrate the use of ring-opening metathesis polymerization to generate new cross-linked membrane materials exhibiting high hydroxide ion conductivity and good mechanical properties. Cross-linking allows for increased ion i...
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tunable high performance cross linked alkaline anion exchange membranes for fuel cell applications
Journal of the American Chemical Society, 2010Co-Authors: Nicholas J Robertso, Henry A Kostalik, Timothy J Clark, Paul F Mutolo, Hector D Abruna, Geoffrey W CoatesAbstract:Fuel cells are energy conversion devices that show great potential in numerous applications ranging from automobiles to portable electronics. However, further development of fuel cell components is necessary for them to become commercially viable. One component critical to their performance is the polymer electrolyte membrane, which is an ion Conductive Medium separating the two electrodes. While proton conducting membranes are well established (e.g., Nafion), hydroxide conducting membranes (alkaline anion exchange membranes, AAEMs) have been relatively unexplored by comparison. Operating under alkaline conditions offers significant efficiency benefits, especially for the oxygen reduction reaction; therefore, effective AAEMs could significantly advance fuel cell technologies. Here we demonstrate the use of ring-opening metathesis polymerization to generate new cross-linked membrane materials exhibiting high hydroxide ion conductivity and good mechanical properties. Cross-linking allows for increased ion incorporation, which, in turn supports high conductivities. This facile synthetic approach enables the preparation of cross-linked materials with the potential to meet the demands of hydrogen-powered fuel cells as well as direct methanol fuel cells.
Paul F Mutolo - One of the best experts on this subject based on the ideXlab platform.
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tunable high performance cross linked alkaline anion exchange membranes for fuel cell applications
Journal of the American Chemical Society, 2010Co-Authors: Nicholas J Robertson, Henry A Kostalik, Timothy J Clark, Paul F Mutolo, Hector D Abruna, Geoffrey W CoatesAbstract:Fuel cells are energy conversion devices that show great potential in numerous applications ranging from automobiles to portable electronics. However, further development of fuel cell components is necessary for them to become commercially viable. One component critical to their performance is the polymer electrolyte membrane, which is an ion Conductive Medium separating the two electrodes. While proton conducting membranes are well established (e.g., Nafion), hydroxide conducting membranes (alkaline anion exchange membranes, AAEMs) have been relatively unexplored by comparison. Operating under alkaline conditions offers significant efficiency benefits, especially for the oxygen reduction reaction; therefore, effective AAEMs could significantly advance fuel cell technologies. Here we demonstrate the use of ring-opening metathesis polymerization to generate new cross-linked membrane materials exhibiting high hydroxide ion conductivity and good mechanical properties. Cross-linking allows for increased ion i...
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tunable high performance cross linked alkaline anion exchange membranes for fuel cell applications
Journal of the American Chemical Society, 2010Co-Authors: Nicholas J Robertso, Henry A Kostalik, Timothy J Clark, Paul F Mutolo, Hector D Abruna, Geoffrey W CoatesAbstract:Fuel cells are energy conversion devices that show great potential in numerous applications ranging from automobiles to portable electronics. However, further development of fuel cell components is necessary for them to become commercially viable. One component critical to their performance is the polymer electrolyte membrane, which is an ion Conductive Medium separating the two electrodes. While proton conducting membranes are well established (e.g., Nafion), hydroxide conducting membranes (alkaline anion exchange membranes, AAEMs) have been relatively unexplored by comparison. Operating under alkaline conditions offers significant efficiency benefits, especially for the oxygen reduction reaction; therefore, effective AAEMs could significantly advance fuel cell technologies. Here we demonstrate the use of ring-opening metathesis polymerization to generate new cross-linked membrane materials exhibiting high hydroxide ion conductivity and good mechanical properties. Cross-linking allows for increased ion incorporation, which, in turn supports high conductivities. This facile synthetic approach enables the preparation of cross-linked materials with the potential to meet the demands of hydrogen-powered fuel cells as well as direct methanol fuel cells.