1,102 research outputs found
David Stewart Jenkinson. 25 February 1928 — 16 February 2011
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David Jenkinson was one of the most influential soil scientists of his generation, bringing new insights into the transformations of organic matter and nitrogen in soil. He spent the majority of his career at Rothamsted Research, Harpenden, UK. His studies were influential regarding the role of soil carbon stocks in the context of climate change and the role of nitrogen fertilizer in delivering adequate supplies of food for a growing world population. His research encompassed both fundamental studies on soil processes and immensely practical applications of this knowledge, often utilizing the Rothamsted long-term experiments that have run for over 170 years. He is particularly well known for his development of a method for determining the quantity of organic carbon held in the cells of living micro-organisms in soil, termed the ‘soil microbial biomass’. This breakthrough opened the way for a new wave of soil biological research. David developed one of the earliest computer models for the turnover of organic carbon in soil, known as the Rothamsted Carbon Model, RothC. This model, conceptually very simple, has proved highly successful in simulating and predicting changes in soil organic carbon (SOC) content under different management practices worldwide, being used by over 2600 people in 115 countries. His research using the stable isotope of nitrogen,
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N, in large-scale field experiments drew attention to the factors leading to inefficiencies in the use of nitrogen fertilizer but also demonstrated that it is possible to achieve high efficiency if good agricultural management practices are followed. It also demonstrated, more clearly than previously, the great importance of soil organic matter as a source of nitrogen for crops and the role of the soil microbial biomass both in immobilizing a proportion of applied fertilizer nitrogen and also in causing confusion in the interpretation of such experiments. By calculating nitrogen budgets for the Rothamsted long-term experiments he quantified the deposition of nitrogen compounds from atmosphere to land, laying foundations for later studies concerning the ecological and agricultural impacts of this significant input of nitrogen.
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The role of N-Ras mutation in leukaemia cells John David Jenkinson
No full textAvailable from British Library Document Supply Centre- DSC:DXN055562 / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo
Thomas Jenkinson Woodward, Bungay, [Suffolk], to James Edward Smith
No full textConfirms he will not be attending Linnean Society anniversary meeting. [Robert] Stone [(c 1751-1829), botanist] severely ill with gout in his stomach but now recovered; he had thought of quitting the Linnean Society but now does not. Recommends [David Elisha] Davy of Yoxford, [Suffolk], who is to visit London, "a very diligent young botanist" who intends to join the Linnean Society once he knows more of the science
Thomas Jenkinson Woodward, Bungay, [Suffolk], to James Edward Smith
No full textConfirms he will not be attending Linnean Society anniversary meeting. [Robert] Stone [(c 1751-1829), botanist] severely ill with gout in his stomach but now recovered; he had thought of quitting the Linnean Society but now does not. Recommends [David Elisha] Davy of Yoxford, [Suffolk], who is to visit London, "a very diligent young botanist" who intends to join the Linnean Society once he knows more of the science
The Public Philosophy Experiment
No full textThis episode of Why? is a special one–our 50th–and to celebrate we’re changing things around. Our most frequent guest Clay Jenkinson interviews host Jack Russell Weinstein. That’s right, after almost four years of asking other people about their research, it’s his turn on the hot seat. So tune in for a s spirited and spontaneous discussion.
Clay Jenkinson is the Director of The Dakota Institute through The Lewis & Clark Fort Mandan Foundation, Chief Consultant to The Theodore Roosevelt Center through Dickinson State University, Distinguished Humanities Scholar at Bismarck State College, and a columnist for the Bismarck Tribune. A cultural commentator who has devoted most of his professional career to public humanities programs, Clay is the host of public radio’s The Thomas Jefferson Hour. He has been honored by two United States presidents for his work. On November 6, 1989, he received one of the first five Charles Frankel Prizes, the National Endowment for the Humanities’ highest award (now called the National Humanities Medal), at the nomination of the NEH Chair, Lynne Cheney. Since his first work with the North Dakota Humanities Council in the late 1970s, including a pioneering first-person interpretation of Meriwether Lewis, Clay Jenkinson has made thousands of presentations throughout the United States and its territories, including Guam and the Northern Marianas. He is also the author of numerous bookshttps://commons.und.edu/why-radio-archive/1087/thumbnail.jp
THE TRAVEL DAIRY OF THE AMBASSADOR, TOURIST AND MERCHANT ANTONIO JENKINSON REFLECTS THE INFORMATION ABOUT STATE MANAGEMENT IN THE COUNTRIES OF CENTRAL ASIA
No full textIn this article, based on the work of Antonio Jenkinson, the author sheds on light on the issues of state management in Central Asia in the 16th century
Eric Sevareid and the Philosophy of Journalism
No full textWhat constitutes serious journalism? Can a reporter be a philosopher? How did broadcast journalism change the philosophy behind news reporting? These are just some of the questions that come to mind when one thinks about the life and work of Eric Sevareid. Born in Velva, North Dakota, Sevareid was one of America’s most influential broadcast journalists. One of “Murrow’s Boys” – named as such because of his extensive work with the legendary Edward R. Murrow – his reports on World War II captivated America. On this episode of Why?, Clay Jenkinson returns to examine Sevareid’s legacy and the ways in which journalism has changed since then. Discussing his current documentary project on the legendary reporter and Sevareid’s autobiography Not So Wild A Dream, Jenkinson will explore the impact journalism has on the world around us and ways in which autobiography reveals how one person, at least, crafted and pursued his personal mission.
The episode also celebrates the new “philosophy issue” of North Dakota Humanities Council’s magazine On Second Thought. Click here download a copy. Or, click here to read it online.
A cultural commentator who has devoted most of his professional career to public humanities programs, Clay Jenkinson is the host of public radio’s The Thomas Jefferson Hour. He has been honored by two United States presidents for his work. On November 6, 1989, he received one of the first five Charles Frankel Prizes, the National Endowment for the Humanities’ highest award (now called the National Humanities Medal), at the nomination of the NEH Chair, Lynne Cheney. Since his first work with the North Dakota Humanities Council in the late 1970s, including a pioneering first-person interpretation of Meriwether Lewis, Clay Jenkinson has made thousands of presentations throughout the United States and its territories, including Guam and the Northern Marianas. He is also the author of numerous books.
Why?’s host Jack Russell Weinstein says, “Sevareid is a romantic figure who builds his sense of self on an idealized North Dakota childhood. These days, Clay Jenkinson is probably America’s most recognized North Dakota romantic. I can therefore think of no better person to channel Sevareid and no more appropriate mind to explore these issues with. I’m thrilled for Clay’s return to the show and for the opportunity to once again examine how the lives of North Dakotans reveal the larger human experience.”https://commons.und.edu/why-radio-archive/1121/thumbnail.jp
Thomas Jenkinson Woodward, Bungay, [Suffolk], to James Edward Smith
No full textThanks for "[Botany of] New Holland" and specimens; glad to hear a second fasciculus is printing and a third "Icones [pictae]" will appear. Hopes death of Smith's brother, Richard, was natural, though knowing his situation and "perverseness" had his doubts and fears. Envies Smith his visit to Dr [Nichola] Gwyn in Ipswich, [Suffolk], and Harwich, [Essex]; finding of a 'Mentha' a "very capital discovery", should figure in "English botany", will inform [John] Pitchford, though doubts he will get through his mints. Gave [David Elisha] Davy Smith's specimen of 'Satyrium', as requested, does not grow near Bungay. Glad to see 'Linum tenuifolium'; distinct from their plant and specimens of wild 'L. angustifolium'.
Agrees to [Edmund] Davall's proposal to exchange specimens. Glad to hear of safe return of [Adam] Afzelius and François [Borone]. Has been studying 'Fucus abrotanifolius', 'F. foeniculaceus', and 'F. concatenatus'; detailed observations of each and character descripton of 'F. abrotanifolius'. Heard Smith is visiting Lady Rockingham and other botanical friends before returning to Frogmore [lecturing the Queen and Princesses]. Sends specimen of unknown plant picked at Lowestoft, [Suffolk] [Smith has annotated 'Spergula nodosa']
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