Results 121 to 130 of about 58,578 (164)

ALLELOPATHY AND FIRE CYCLE IN BRAZILIAN CERRADO

Revista Ibero-Americana de Humanidades, Ciências e Educação, 2023
Allelopathy refers to the effect of biochemical interactions from one plant to another plant including inhibitory and stimulatory effects. The products, allelochemicals are highly toxic, and the production of these compounds not only can be stimulated by plants and microorganism, but also by environment factors e.g.
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Branched GAX cycle gas fired heat pump

IECEC 96. Proceedings of the 31st Intersociety Energy Conversion Engineering Conference, 2002
GAX absorption heat pump cycles are characterized by the generator-absorber heat exchange (GAX) between the high-temperature end of the absorber and the low temperature end of the generator. The improved thermodynamic performance of the basic GAX cycle coupled with its mechanical simplicity has attracted substantial interest in using this cycle for gas-
D.C. Erickson, G. Anand, R.A. Papar
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Performance of externally fired combined cycle (EFCC)

International Journal of Exergy, 2005
The externally fired combined cycle (EFCC) which utilises coal as the primary fuel through a gas turbine cycle is a clean coal technology. Natural gas is used as the supplementary fuel, but the ultimate goal of the EFCC concept is a coal only option. In this study, the performance of the EFCC plant is evaluated based on the first and the second laws of
T. Dogan, T. Yesin
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Fire and the Nitrogen Cycle in California Chaparral

Science, 1973
Analysis of soils from burned and unburned chaparral indicates that high nitrate concentrations following fire are due to the addition of ammonium and organic nitrogen in the ash. Inhibition of mineralization in unburned chaparral results in low nitrate concentrations.
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Fire cycling in the larch-dominated communities

IGARSS 2003. 2003 IEEE International Geoscience and Remote Sensing Symposium. Proceedings (IEEE Cat. No.03CH37477), 2004
The fires return intervals and fire-danger cycling in the Siberian larch-dominated communities, with their relevance to the landscape elements were investigated. The goal of this study is to investigate wildfire cycling, and to formalize burns distribution over the different landscape elements.
V.I. Kharuk, M.L. Dvinskaya, K.J. Ranson
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Fire aerosols slow down the global water cycle

2022
<p>Fire is an important Earth system process and the largest source of global primary carbonaceous aerosols. Earlier studies have focused on the influence of fire aerosols on radiation, surface climate, air quality, and biogeochemical cycle.
Fang Li, David Lawrence, Yiquan Jiang, Xiaohong Liu   +3 more
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Neuronal firing in the pallidal region: firing patterns during sleep-wakefulness cycle in cats

Electroencephalography and Clinical Neurophysiology, 1987
Neuronal activity was investigated by extracellular microelectrodes in the pallidal region of freely moving cats during wakefulness (W), slow-wave sleep (SWS) and paradoxical sleep (PS). The firing of 150 units from 35 points was examined. On the basis of the modifications of firing rates and patterns during the sleep-wakefulness cycle, 5 groups of ...
L, Detari, G, Juhasz, T, Kukorelli
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Coal-Fired Open-Cycle MHD Plants

1984
Magnetohydrodynamics, MHD, offers an environmentally attractive approach for using the abundant U.S. cogresources to produce electric power at low cost and very high efficiency. MHD) generators produce electric power by expanding a high-velocity conducting fluid through a strong magnetic field.
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Fire and Nutrient Cycling in Temperate Ecosystems

BioScience, 1982
Wildfire is an integral component of many temperate ecosystems. The impact of wildfire on the nutrient dynamics of an ecosystem is dependent on the proportion of biomass and nutrients aboveground, which is therefore susceptible to combustion. Mechanisms for postfire nutrient conservation are most strongly developed in nutrient-poor (oligotrophic ...
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Fuel Moisturization for Natural Gas Fired Combined Cycles

Volume 5: Turbo Expo 2005, 2005
Natural gas fired combined cycles have enjoyed increasing success in power generation over the past several years, driven to a significant degree by their high efficiency. This paper discusses development of a fuel moisturization system targeted at new construction that improves plant efficiency (∼0.16% points.), increases plant output (∼1.3%), and ...
Raub W. Smith, Aarron D. Johansen, Jatila Ranasinghe   +2 more
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