Publication Year: 2013 / Subject term: 2,2-diphenyl-1-picrylhydrazyl and microwave treatment

Author:: Manuela M. Moreira; Simone Morais; Daniel O. Carvalho; Aquiles A. Barros; Cristina Delerue-Matos; Luís. F. Guido
Source:: Food research international 2013 v.54 no.1 pp. 382-388
ISSN:: 0963-9969
Subject:: 2,2-diphenyl-1-picrylhydrazyl; antioxidant activity; antioxidants; chocolate; industry; malt; microwave treatment; p-coumaric acid; spent grains; temperature
Abstract:: ... The antioxidant activity and phenolic composition of brewer's spent grain (BSG) extracts obtained by microwave-assisted extraction from two malt types (light and dark malts) were investigated. The total phenolic content (TPC) and antioxidant activity among the light BSG extracts (pilsen, melano, melano 80 and carared) were significantly different (p<0.05) compared to dark extracts (chocolate and b ...
DOI:: 10.1016/j.foodres.2013.07.023
: https://doi.org/10.1016/j.foodres.2013.07.023

Author:: Fouad Menaceur; Ahmed Benchabane; Mohamed Hazzit; Aoumeur Baaliouamer
Source:: Journal of Biologically Active Products from Nature 2013 v.3 no.1 pp. 87-96
ISSN:: 2231-1874
Subject:: 2,2-diphenyl-1-picrylhydrazyl; Juniperus phoenicea; alpha-pinene; antioxidant activity; antioxidants; butylated hydroxytoluene; chemical composition; essential oils; ethanol; gallic acid; gas chromatography-mass spectrometry; hydrodistillation; leaves; microwave treatment; quercetin; small fruits; solvents
Abstract:: ... Essential oils of Algerian Juniperus phoenicea L. obtained from leaves and berries by hydrodistillation (HD) and from berries by Solvent Free Microwave Assisted Extraction (SFMAE) were investigated using both capillary GC and GC-MS techniques. The monoterpene hydrocarbons constituted the most prominent group of constituents (43.2-86.5 %) in the three essential oils with α-pinene (34.4-80.8 %) as t ...
DOI:: 10.1080/22311866.2013.782754
: https://doi.org/10.1080/22311866.2013.782754

Author:: Lee Choon Young; Held Rich; Sharma Ajit; Baral Rom; Nanah Cyprien; Dumas Dan; Jenkins Shannon; Upadhaya Samik; Du Wenjun
Source:: Journal of organic chemistry 2013 v.78 no.22 pp. 11221-11228
ISSN:: 1520-6904
Subject:: 2,2-diphenyl-1-picrylhydrazyl; ambient temperature; antioxidant activity; antioxidants; catalysts; copper; dendrimers; granules; inhibitory concentration 50; microwave radiation; microwave treatment; organic chemistry; polyphenols
Abstract:: ... Syringaldehyde- and vanillin-based antioxidant dendrimers were synthesized via microwave-assisted alkyne–azide 1,3-dipolar cycloaddition using copper granules as a catalyst. The use of Cu(I) as a catalyst resulted in copper contaminated dendrimers. To produce copper-free antioxidant dendrimers for biological applications, Cu(I) was substituted with copper granules. Copper granules were ineffective ...
DOI:: 10.1021/jo401603d
PubMed:: 24127771
PubMed Central:: PMC3875327
: https://doi.org/10.1021/jo401603d

Author:: Zenggen Liu; Jun Dang; Qilan Wang; Minfeng Yu; Lei Jiang; Lijuan Mei; Yun Shao; Yanduo Tao
Source:: International journal of biological macromolecules 2013 v.61 pp. 127-134
ISSN:: 0141-8130
Subject:: polysaccharides; Lycium ruthenicum; hydrogen peroxide; 2,2-diphenyl-1-picrylhydrazyl; response surface methodology; Fourier transform infrared spectroscopy; microwave treatment; superoxide anion; antioxidant activity
Abstract:: ... Dynamic microwave-assisted extraction (DMAE) technique was employed for the extraction of polysaccharides from Lycium ruthenicum (LRP). The extracting parameters were optimized by using three-variable-three-level Box–Behnken design and response surface methodology (RSM) based on the single-factor experiments. RSM analysis indicated good correspondence between experimental and predicted values. The ...
DOI:: 10.1016/j.ijbiomac.2013.06.042
: https://doi.org/10.1016/j.ijbiomac.2013.06.042

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