Institution
The Hertz Corporation
About: The Hertz Corporation is a based out in . It is known for research contribution in the topics: Population & Soil water. The organization has 9562 authors who have published 11044 publications receiving 447929 citations. The organization is also known as: Hertz Rental Car & Hertz Rent-a-Car.
Topics: Population, Soil water, Natural rubber, Virus, Hordeum vulgare
Papers published on a yearly basis
Papers
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TL;DR: In this article, a combination of experimental and modelling approaches can provide insights that are otherwise unattainable, including a basis for more precise advice on nitrogen cycle processes, including advice on N fertilization.
Abstract: . A quantitative knowledge of nitrogen cycle processes is required to design strategies for decreasing leakage of N from agriculture to the wider environment. However, it is remarkably difficult to make reliable measurements of many of the key processes under realistic field conditions. In impermeable soils hydrologically separated plots provide an invaluable method of measuring leaching and runoff. Estimates of nitrate leaching using porous ceramic cups agree well with lysimeter measurements on sandy soil but are suspect on more structured soils. Estimates of N2O flux from soil are subject to great spatial heterogeneity; developing long path-length measuring techniques may overcome this problem.
15N labelling is valuable for assessing fertilizer N loss, forms of N left in soil and the fate of N from crop residues. The combination of experimental and modelling approaches can provide insights that are otherwise unattainable, including a basis for more precise advice on N fertilization.
Mineralization of soil organic matter and crop or animal residues provides much of the nitrate leached during winter under the climatic conditions of north-west Europe, because mineralization is poorly synchronized with crop N uptake. Maintenance of crop cover during winter can greatly decrease leaching but the long-term effects on the N cycle of winter cover crops or incorporating cereal straw are not yet clear.
104 citations
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TL;DR: Oral administration of Ro 32-0432 inhibited subsequent phorbol ester-induced edema in rats demonstrating the systemic efficacy of the compound to inhibit PKC-driven responses and demonstrating the crucial role for PKC in T-cell activation and that selective p.o.C inhibitors are efficacious in preventing T- cell driven chronic inflammatory responses in vivo.
Abstract: Several lines of circumstantial evidence support the assumption that protein kinase C (PKC) activation together with elevated levels of cytosolic Ca++ are necessary for T-cell activation and proliferation in response to a physiological stimulus, i.e., MHC class II restricted antigen presentation. By using a potent, cell-permeable and selective inhibitor of PKC, Ro 32-0432, we have tested this hypothesis. Ro 32-0432 inhibits interleukin-2 (IL-2) secretion, IL-2 receptor expression in, and proliferation of, peripheral human T-cells stimulated with phorbol ester together with phytohemagglutin or anti-CD3, but does not inhibit IL-2 induced proliferation in cells already stimulated to express IL-2 receptors. Proliferation of the influenza peptide antigen HA 307-319-specific human T-cell clone (HA27) after exposure to antigen-pulsed autologous presenting cells was also inhibited by Ro 32-0432. Oral administration of Ro 32-0432 inhibited subsequent phorbol ester-induced edema in rats demonstrating the systemic efficacy of the compound to inhibit PKC-driven responses. Induction of more physiologically T-cell driven responses such as host vs. graft responses and the secondary paw swelling in adjuvant-induced arthritis were also inhibited by Ro 32-0432. These data demonstrate the crucial role for PKC in T-cell activation and that selective p.o. bioavailable PKC inhibitors are efficacious in preventing T-cell driven chronic inflammatory responses in vivo. Inhibition of PKC represents an important mechanistic approach to prevent T-cell activation and compounds of this class may have important therapeutic applicability to chronic inflammatory and autoimmune diseases.
104 citations
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TL;DR: In this article, the oral health of elderly occupants in a random sample of 55 of the 110 residential and nursing homes in West Hertfordshire was assessed in a structured interview and was conducted with all those residents who were able to respond.
104 citations
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TL;DR: In this paper, the effects of 15N-labeled urea, (NH4)2SO4 and KNO3 on ammonium fixation were examined under aerobic conditions in an acid tropical soil and in a neutral temperate soil.
Abstract: The effects of 15N-labelled urea, (NH4)2SO4 and KNO3 on immobilization, mineralization, nitrification and ammonium fixation were examined under aerobic conditions in an acid tropical soil (pH 4.0) and in a neutral temperate soil (pH 6.8). Urea, (NH4)2SO4 and KNO3 slightly increased net mineralization of soil organic nitrogen in both soils. There was also an apparent Added Nitrogen Interaction (ANI) i.e. added labelled NH4-N stood proxy for unlabelled NH4-N that would otherwise have been immobilized. So far as immobilization and nitrification were concerned, urea and (NH4)2SO4 behaved very similarly in each soil. Immobilization of NO3-N was negligible in both soils. Some of the added labelled NH4-N was rapidly fixed, more by the temperate soil than by the tropical soil. This labelled fixed NH4-N decreased during incubation, in contrast to labelled organic N, which did not decline.
104 citations
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TL;DR: Etude preliminaire des arriere-effets des metaux lourds dans un sol traite par des boues residuaires avant 1961 sur les mycorhizes aborigenes and sur une my-corhize introduite (Glomus mosseae) en essais en pots as mentioned in this paper.
Abstract: Etude preliminaire des arriere-effets des metaux lourds dans un sol traite par des boues residuaires avant 1961 sur les mycorhizes aborigenes et sur une mycorhize introduite (Glomus mosseae) en essais en pots
104 citations
Authors
Showing all 9562 results
Name | H-index | Papers | Citations |
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Pete Smith | 156 | 2464 | 138819 |
J. H. Hough | 117 | 904 | 89697 |
Christine H. Foyer | 116 | 490 | 61381 |
Steve P. McGrath | 115 | 483 | 46326 |
Nial R. Tanvir | 112 | 877 | 53784 |
Fang-Jie Zhao | 107 | 372 | 39328 |
Martin R Turner | 98 | 503 | 34965 |
Peter R. Shewry | 97 | 845 | 40265 |
Helen E. Heslop | 97 | 523 | 36292 |
Stephen E. Harris | 95 | 421 | 46780 |
Brian C. J. Moore | 93 | 711 | 38036 |
Ken E. Giller | 92 | 555 | 36374 |
Kingston H. G. Mills | 92 | 313 | 29630 |
Alex B. McBratney | 92 | 552 | 34770 |
David M. Glover | 92 | 301 | 24620 |