Results 251 to 260 of about 46,982 (304)

Larvicidal activity of para-Benzoquinones

Parasitology Research, 2010
Plant 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, Ygor W, Vieira, Marciana P, Uliana, Manuela A, Melo, Timothy J, Brocksom, Sócrates C H, Cavalcanti   +5 more
openaire   +2 more sources

Aqueous Photochemistry of Methyl-Benzoquinone

The Journal of Physical Chemistry A, 2008
Chemical 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, Min, Jia, Pamela P, Vaughan, Daniel E, Falvey, Neil V, Blough   +4 more
openaire   +2 more sources

Benzoquinone imines. Part II. Hydrolysis of p-benzoquinone monoimine and p-benzoquinone di-imine

Journal of the Chemical Society B: Physical Organic, 1969
Kinetic studies of the hydrolysis of p-benzoquinone monoimine, over the pH range 2–10, have shown that the reaction exhibits first-order kinetics over the whole pH range. The pH dependence indicates a rate-controlling step involving the reaction of both the free imine and its protonated form with water, the latter being 1·8 × 103 more reactive than the
openaire   +1 more source

High-pressure infrared spectra of 1,4-benzoquinone and tetrafluoro-1,4-benzoquinone

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 1996
Abstract 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
openaire   +1 more source

Electron affinities of p-benzoquinone, p-benzoquinone imine and p-benzoquinone diimine, and spin densities of their p-benzosemiq

Journal of Computer-Aided Molecular Design, 1997
Restricted and unrestricted (U) Hartree–Fock (HF), second-order Moller–Plesset perturbation (MP2), density functional (DF), hybrid HF/DF and semiempirical (half-electron (HE) method) models have been used to calculate adiabatic electron affinities (EAad values) of p- benzoquinone (I), p-benzoquinone imine (VI) and p-benzoquinone diimine (XI), as well ...
Yitbarek H. Mariam, Lek Chantranupong
openaire   +1 more source

Occurrence and transformation of newly discovered 2-bromo-6-chloro-1,4-benzoquinone in chlorinated drinking water

Journal of Hazardous Materials, 2022
Shaoyang Hu, Beibei Zhang, Tingting Gong
exaly  

Benzoquinone-assisted heterogeneous activation of PMS on Fe3S4 via formation of active complexes to mediate electron transfer towards enhanced bisphenol A degradation

Water Research, 2022
Jiayu Tian
exaly  

1,4-Benzoquinone and 1,4-hydroquinone based determination of electron and superoxide radical formed in heterogeneous photocatalytic systems

Journal of Photochemistry and Photobiology A: Chemistry, 2021
Orsolya Fónagy, Ottó Horváth
exaly  

1,4-benzoquinone, 2-methyl-1,4-benzoquinone ve tetramethyl-1,4-benzoquinone moleküllerinin moleküler elektronik spektroskopi yöntemi ile incelenmesi

2020
ÖZET Yüksek Lisans Tezi l,4-BENZOQUİNONE, 2-METHYL-l,4-BENZOQUİNONE VE TETRAMETHYL-l,4-BENZOQUİNONE MOLEKÜLLERİNİN MOLEKÜLER ELEKTRONİK SPEKTROSKOPİ YÖNTEMİ İLE İNCELENMESİ Mevlüt KARABIYIK Selçuk Üniversitesi Fen Bilimleri Enstitüsü Fizik Anabilim Dalı Danışman : Yard.Doç.Dr. Erhan AKIN 2002, 66 Sayfa Jüri: Prof.Dr. Hüseyin YÜKSEL Doç.Dr. H.ŞükürKn,IÇ
openaire   +1 more source

Benzoquinone Ansamycins

2005
openaire   +2 more sources