The Experts below are selected from a list of 3724122 Experts worldwide ranked by ideXlab platform
Gebisa Ejeta - One of the best experts on this subject based on the ideXlab platform.
-
Revitalizing agricultural research for global food security
Food Security, 2009Co-Authors: Gebisa EjetaAbstract:An imaginative American legislation, the Morrill Act of 1862, established the U. S. Land Grant University Model, where such universities would adopt a uniform, tri-partite function of education, research, and extension. It legislated that these universities would provide segments of society with practical and timely education that would be useful to their daily lives. A profound concept based on a system that focused on educating the next generation of agricultural scientists, providing support to the generation of new knowledge and technology, and communicating the results of the new discoveries to key stakeholders was born. Sustained support of this 19th century legislation and the commitment and drive of generations of agricultural scientists and farmers brought about remarkable advances, making 20th century American agriculture most productive and the envy of the world. These successes were replicated in North America, Europe, and in much of the developed world, and served as the impetus for the emergence of the Asian Green Revolution. Farming became a profitable business and consumers were accustomed to safe and relatively inexpensive supply of food, unfortunately leading to 21st century complacency. The recent food price crises seem to have reawakened world leaders and donor agencies to the necessity of assuring the food security of nations and to revitalizing and reinvesting in the agricultural sciences.
-
Revitalizing agricultural research for global food security
Food Security, 2009Co-Authors: Gebisa EjetaAbstract:An imaginative American legislation, the Morrill Act of 1862, established the U. S. Land Grant University Model, where such universities would adopt a uniform, tri-partite function of education, research, and extension. It legislated that these universities would provide segments of society with practical and timely education that would be useful to their daily lives. A profound concept based on a system that focused on educating the next generation of agricultural scientists, providing support to the generation of new knowledge and technology, and communicating the results of the new discoveries to key stakeholders was born. Sustained support of this 19th century legislation and the commitment and drive of generations of agricultural scientists and farmers brought about remarkable advances, making 20th century American agriculture most productive and the envy of the world. These successes were replicated in North America, Europe, and in much of the developed world, and served as the impetus for the emergence of the Asian Green Revolution. Farming became a profitable business and consumers were accustomed to safe and relatively inexpensive supply of food, unfortunately leading to 21st century complacency. The recent food price crises seem to have reawakened world leaders and donor agencies to the necessity of assuring the food security of nations and to revitalizing and reinvesting in the agricultural sciences.
Beyza S. Göncü - One of the best experts on this subject based on the ideXlab platform.
-
Biodegradable and biocompatible radiopaque iodinated poly-3-hydroxy butyrate: synthesis, characterization and in vitro/in vivo X-ray visibility
Polymer Bulletin, 2020Co-Authors: Arzu Erol, Derya B. Hazer Rosberg, Baki Hazer, Beyza S. GöncüAbstract:Some novel radiopaque biodegradable and biocompatible iodinated polymers based on poly-3-hydroxy butyrate (PHB) were obtained. Following the attachment of diethanol amine to PHB, the hydroxyl ends were capped with 4-iodobenzoic acid and 2,3,5-tri-iodobenzoic acid. In this manner, tri-novel radiopaque polymers were obtained. The resulting polymers were structurally characterized by NMR technique. They were evaluated with respect to their possible use as radiopaque implant biomaterials indicating X-ray visibility in a noninvasive manner using routine X-ray absorption imaging techniques. These polymers exhibited good radiopacity with conventional imaging X-ray techniques in vivo. Additionally, biocompatibility of these iodinated polymers was also evaluated. There were no signs of infection or abscess formation on the surgical area. These novel radiopaque PHBs should be promising biomaterials for a new-generation radiopaque materials.
Göncü, Beyza S. - One of the best experts on this subject based on the ideXlab platform.
-
Biodegradable and biocompatible radiopaque iodinated poly-3-hydroxy butyrate: synthesis, characterization and in vitro/in vivo X-ray visibility
'Springer Science and Business Media LLC', 2019Co-Authors: Erol Arzu, Rosberg, Derya B. Hazer, Hazer Baki, Göncü, Beyza S.Abstract:Some novel radiopaque biodegradable and biocompatible iodinated polymers based on poly-3-hydroxy butyrate (PHB) were obtained. Following the attachment of diethanol amine to PHB, the hydroxyl ends were capped with 4-iodobenzoic acid and 2,3,5-tri-iodobenzoic acid. In this manner, tri-novel radiopaque polymers were obtained. The resulting polymers were structurally characterized by NMR technique. They were evaluated with respect to their possible use as radiopaque implant biomaterials indicating X-ray visibility in a noninvasive manner using routine X-ray absorption imaging techniques. These polymers exhibited good radiopacity with conventional imaging X-ray techniques in vivo. Additionally, biocompatibility of these iodinated polymers was also evaluated. There were no signs of infection or abscess formation on the surgical area. These novel radiopaque PHBs should be promising biomaterials for a new-generation radiopaque materials. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature
Matthias Schmitt - One of the best experts on this subject based on the ideXlab platform.
-
Republished: Cardiac MRI of patients with implanted electrical cardiac devices
Postgraduate Medical Journal, 2014Co-Authors: Mark Ainslie, Christopher A. Miller, Benjamin Brown, Matthias SchmittAbstract:Implantable pulse generators and defibrillators have traditionally been considered contraindications to MRI. However, recent data have challenged this paradigm and demonstrated that patients with newer generation devices can safely undergo MRI, including cardiac MRI, provided basic precautions are taken. Indeed, the introduction of MRI conditional systems has led to a conceptual shift in clinical decision making-'can this patient undergo MRI safely?' is being superseded by 'should this patient be implanted with an MRI conditional device?'. This review outlines the risks associated with MRI in patients with implanted cardiac devices, and discusses practical measures to minimise risks and facilitate safe and diagnostic scanning.
-
Cardiac MRI of patients with implanted electrical cardiac devices
Heart, 2013Co-Authors: Mark Ainslie, Christopher A. Miller, Benjamin Brown, Matthias SchmittAbstract:Implantable pulse generators and defibrillators have traditionally been considered contraindications to MRI. However, recent data have challenged this paradigm and demonstrated that patients with newer generation devices can safely undergo MRI, including cardiac MRI, provided basic precautions are taken. Indeed, the introduction of MRI conditional systems has led to a conceptual shift in clinical decision making-'can this patient undergo MRI safely?' is being superseded by 'should this patient be implanted with an MRI conditional device?'. This review outlines the risks associated with MRI in patients with implanted cardiac devices, and discusses practical measures to minimise risks and facilitate safe and diagnostic scanning.
Zeting Yu - One of the best experts on this subject based on the ideXlab platform.
-
investigation on performance of an integrated solid oxide fuel cell and absorption chiller tri generation system
International Journal of Hydrogen Energy, 2011Co-Authors: Zeting YuAbstract:Abstract An integrated Tri-Generation system incorporating a solid oxide fuel cell (SOFC) and a double-effect water/Lithium Bromide absorption chiller is presented in this paper. The proposed Tri-Generation system can provide power, cooling or heating simultaneously with a typical gas produced from a gasication process. The system conguration and design are discussed, and the energy and mass balances are obtained through the matrix representation method and integrated into a simulation program by MATLAB soft package. The developed model comprises of three modules: SOFC module, exhaust combusting and HRSG module, and the absorption chiller module. Validation of the SOFC model is performed by comparison with a single tubular cell of Siemens-Westinghouse, and a specific case study of the system is presented. For parametric analysis, the fuel utilization ratio, fuel flow ratio and air inlet temperature are investigated and the results are discussed in detail.
