Results 201 to 210 of about 6,035 (254)
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Larvicidal activity of para-Benzoquinones
Parasitology Research, 2010Plant products may be alternative sources of mosquito larval control agents, since they constitute a rich source of bioactive compounds that are biodegradable into nontoxic products. It has been reported that quinones and derivatives present toxic activity against mosquito larvae Aedes aegypti.
Damião P, De Sousa +5 more
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Reaction of selenomethionine with o-benzoquinone
Analytical Biochemistry, 1981Abstract A new reaction of selenomethionine with o-benzoquinone is described. This reaction can be used to distinguish between methionine and selenomethionine.
M N, Gupta, R, Gopinath, K, Raju
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Stereoregular Poly(benzoquinone imines) from Methyl-Substituted Benzoquinones
Macromolecules, 1997Stereoregular poly(benzoquinone imine)s have been synthesized by polycondensation of dimethylbenzoquinone with 4,4'thiodianiline and 4,4'methylendianiline.
Harold W. Boone +4 more
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The complexing of histamine with p-benzoquinone
Biochimica et Biophysica Acta (BBA) - General Subjects, 1972Histamine interacts with p-benzoquinone to form an unstable complex which breaks down to give hydroquinone. Rate constants and thermodynamic data have been obtained for the interaction from spectrophotometric measurements using digital simulation techniques.
G H, Moxon, M A, Slifkin
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The Journal of Organic Chemistry, 1996
The structure and energetics of protonated p-benzoquinone (pBQ) have been investigated using high-pressure mass spectrometry and ab initio calculations. The experimental proton affinity of pBQ is 801.4 +/- 8.9 kJ/mol (191.5 +/- 2.1 kcal/mol) (1sigma) from bracketing measurements and hydration thermochemistry.
Karl K., Irikura +4 more
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The structure and energetics of protonated p-benzoquinone (pBQ) have been investigated using high-pressure mass spectrometry and ab initio calculations. The experimental proton affinity of pBQ is 801.4 +/- 8.9 kJ/mol (191.5 +/- 2.1 kcal/mol) (1sigma) from bracketing measurements and hydration thermochemistry.
Karl K., Irikura +4 more
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The reaction of benzoquinone with amines and proteins
Archives of Biochemistry and Biophysics, 1969Abstract It has been shown that benzoquinone will form 1,4 addition products with amines, amino acids, and proteins. The substituted quinones produced via this reaction have altered redox potentials. The quinone amine adduct can be reduced by ascorbate and oxidized by oxygen to produce hydrogen peroxide. This sequence of reactions can be conveniently
M, Morrison, W, Steele, D J, Danner
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Aqueous Photochemistry of Methyl-Benzoquinone
The Journal of Physical Chemistry A, 2008Chemical trapping studies combined with optical and electron paramagnetic resonance measurements were employed to examine the mechanisms of the aqueous photochemistry of methyl-benzoquinone (mBQ) at both low and high quinone concentrations. At low [mBQ], dimethylsulfoxide (DMSO) reacted with a photogenerated intermediate to form a methyl radical, but ...
Daqing, Gan +4 more
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Amino-substituted p-benzoquinones
Journal of Medicinal Chemistry, 1986Based on the observation of outstanding antineoplastic activity of a number of amino-substituted anthraquinones, thioxanthones, and N-(aminoethyl)-substituted naphthalimides, four types of amino-substituted p-benzoquinones were designed, synthesized, and their biological activity evaluated. Although none of these compounds exhibited inhibitory activity
A E, Mathew, R K, Zee-Cheng, C C, Cheng
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High-pressure infrared spectra of 1,4-benzoquinone and tetrafluoro-1,4-benzoquinone
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 1996Abstract The pressure dependence of the infrared spectra (600–1800, 2500–3600 cm −1 ) has been measured for 1,4-benzoquinone(2,5-cyclohexadiene-1,4-dione) and fluoranil (2,3,5,6-tetrafluoro-2,5-cyclohexadiene-1,4-dione). No phase changes occur in either compound over the pressure range from ambient pressure to 50 kbar in benzoquinone and to 40 kbar ...
Jianfang Wang, D.F.R. Gilson
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Journal of the American Chemical Society, 1990
Etude des especes transitoires obtenues par irradiation a 355 et 532 nm de la benzoquinone-1,4 avec le t-butylethylene, les tetramethyl- et tetraphenyl ...
Schnapp, Karyln A. +4 more
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Etude des especes transitoires obtenues par irradiation a 355 et 532 nm de la benzoquinone-1,4 avec le t-butylethylene, les tetramethyl- et tetraphenyl ...
Schnapp, Karyln A. +4 more
openaire +1 more source