Results 41 to 50 of about 730,568 (347)
Computational Study on Parametric Variation with Solar Heat Induction of an Entrained Flow Gasifier
Energies, 2022 Gasification has played an important role in the sustainable use of waste biomass, providing useful combustible gases in the process. Gasification has an important role in waste management and promotes energy independence for many oil-deficit countries ...
Anirudh Singh +3 more
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, 2017 The objectives of this study were to evaluate the effects of different fertilizer types and application rates on ammonia volatilization loss and to explore nitrogen distribution and nitrogen use efficiency using the 15N isotope tracing technique in ...
Liu Yangyang +4 more
semanticscholar +1 more source
Current Biology, 2010 Plant volatiles are the metabolites that plants release into the air. The quantities released are not trivial. Almost one-fifth of the atmospheric CO2 fixed by land plants is released back into the air each day as volatiles. Plants are champion synthetic chemists; they take advantage of their anabolic prowess to produce volatiles, which they use to ...
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SSRN Electronic Journal, 2014 Estimating volatility from recent high frequency data, we revisit the question of the smoothness of the volatility process. Our main result is that log-volatility behaves essentially as a fractional Brownian motion with Hurst exponent H of order 0.1, at any reasonable time scale.
Gatheral, Jim +2 more
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Fate of allelochemicals in the soil Destino de aleloquímicos no solo
Ciência Rural, 1997 Allelochemicals are compounds released by one plant or plant residues that may have a negative or positive effect on other plant. The importance of allelopathy was extensively explored during the past three decades, with the work concentrating in the ...
Ribas Antonio Vidal, Thomas Trost Bauman
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Nitrogen loss by volatilization of nitrogen fertilizers applied to coffee orchard
, 2016 Ammonia volatilization (N-NH3) is one of the main pathways of Nitrogen loss reducing nitrogen use efficiency in coffee orchard. This work aimed at quantifying ammonia volatilization (N-NH3) losses from N-sources to be used in coffee plantations ...
Anderson William Dominghetti +5 more
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Philosophical Transactions of the Royal Society B: Biological Sciences, 2010 The high food prices experienced over recent years have led to the widespread view that food price volatility has increased. However, volatility has generally been lower over the two most recent decades than previously. Variability over the most recent period has been high but, with the important exception of rice, not out of line with historical ...
C. L. Gilbert, C. W. Morgan
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Estimating Stochastic Volatility under the Assumption of Stochastic Volatility of Volatility [PDF]
Risks, 2020 We propose novel nonparametric estimators for stochastic volatility and the volatility of volatility. In doing so, we relax the assumption of a constant volatility of volatility and therefore, we allow the volatility of volatility to vary over time. Our methods are exceedingly simple and far simpler than the existing ones. Using intraday prices for the
Moawia Alghalith +2 more
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Effect of rice intermittent irrigation on nitrogen cycle and emission in a lysimeter study [PDF]
Caspian Journal of Environmental SciencesAlthough intermittent irrigation is widely regarded as a saving irrigation water technology in paddy fields, it can cause water and air pollution by changing the nitrogen cycle.
Atefeh M. Soltani, Maryam Navabian
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Release of volatile organic compounds from natural rubber at different temperatures
Hecheng xiangjiao gongye, 2022 The effects of different temperatures （80 ℃ and 130 ℃） and different vulcanization temperatures （130 ℃， 140 ℃， and 150 ℃） on volatile organic compounds （VOCs） of two natural rubbers （SVR 3 L and SPR 10#） were investigated by static headspace coupled with
CHEN Xin1 a， ZHANG Bo-yu1 b， WANG Dan-ling2， DU Zhen-xia1 b， WU You-ping1 a
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