25 26 This article describes the development, validation and application of a rapid screening method 27 for the detection and identification of undesirable organic compounds in aquaculture products. 28 A generic sample treatment was applied without any purification or preconcentration step. After 29 extracting the samples with acetonitrile/water 80:20 (0.1% formic acid), the extracts were 30 ce...

1,4-Benzoquinones have been found to prevent olefin isomerization of a number of allylic ethers and long-chain aliphatic alkenes during ruthenium-catalyzed olefin metathesis reactions. Electron-deficient benzoquinones are the most effective additives for the prevention of olefin migration. This mild, inexpensive, and effective method to block olefin isomerization increases the synthetic utility...

Consider a linear time-invariant continuous-time control system _ x(t) = Ax(t) +Bu(t); y(t) = Cx(t) (1) with state x(t) 2 Rn , input u(t) 2 Rm and output y(t) 2 Rp . The matrices A;B and C are constant and of appropriate dimension. Under the implicit assumption that _ x(t) = Ax(t) is unstable, we want to stabilize (1) by introducing feedback into the system. It is well-known that, under mild co...

Fires will become an increasingly frequent perturbation even under the conditions of mild climate zone and interfere with agricultural landscape. Fire is a natural phenomenon, depending on ecosystems, vegetation may develop contribute to occurrence spread fire. Vegetation sour cherry orchard located in climatically dry South Moravian Region, Czech Republic (CR), was evaluated. assessment perfor...

The commutation process causes current ripple to be generated in the drive system of brushless DC (BLDC) motor. This, in turn, leads to output torque ripple. Mechanical vibration and acoustic noise are its influences which are undesirable phenomenon in some applications. A new method is presented in this paper which reduces torque ripple and commutation period in the entire range of motor speed...

This study aims to evaluate the economic and environmental efficiency of Asian African economies. In model proposed, Gross Domestic Product (GDP) is considered as desired output Greenhouse Gases (GHG), like carbon dioxide (CO2) emissions, undesirable output. Capital, labor, fossil fuels, renewable energy consumption are regarded inputs, GDP/CO2 ratio output, by using a log-linear Translog produ...