Results 31 to 40 of about 20,918,698 (229)

Crystal structure of 9,9′-{(1E,1′E)-[1,4-phenylenebis(azanylylidene)]bis(methanylylidene)}bis(2,3,6,7-tetrahydro-1H,5H-pyrido[3,2,1-ij]quinolin-8-ol)

Acta Crystallographica Section E: Crystallographic Communications, 2016
The whole molecule of the title compound, C32H34N2O2, is generated by inversion symmetry; the central benzene ring being situated about the crystallographic inversion center.
Md. Serajul Haque Faizi, Akram Ali, Vadim A. Potaskalov   +2 more
doaj   +1 more source

Impact of environmentally friendly nanoparticles on physical properties of poly p-phenylenediamine

Egyptian Journal of Petroleum, 2020
Eggshell is a bio-friendly substance containing by weight of 95% CaCO3 and 5% the oxides (Mn, Si, Al, Fe, Cr, Cu and Ca) and organic substances. The oxidation was used to prepare the poly(p-phenylenediamine) in the presence of potassium persulphate as an
Dalia S. Fathy, N.A. Mansour, Maher A. El-Hashash, Azza M. Mazrouaa, Manal G. Mohamed   +4 more
doaj   +1 more source

Prevention of diabetes in NOD mice by repeated exposures to a contact allergen inducing a sub-clinical dermatitis. [PDF]

PLoS ONE, 2010
BACKGROUND: Type 1 diabetes is an autoimmune disease, while allergic contact dermatitis although immune mediated, is considered an exposure driven disease that develops due to epicutaneous contact with reactive low-molecular chemicals.
Kaare Engkilde, Karsten Buschard, Axel Kornerup Hansen, Torkil Menné, Jeanne Duus Johansen   +4 more
doaj   +1 more source

Patterns, variability, and predictors of p-phenylenediamine quinones and parent p-phenylenediamines in pregnant women across three trimesters

Environment International
p-Phenylenediamine quinones (PPD-Qs), oxidative derivatives of rubber antioxidant p-phenylenediamines (PPDs), have garnered increasing concern due to their environmental ubiquity and toxicity.
Jing Zhang, Hongxiu Liu, Hongzhi Zhao, Qingyuan Dai, Wei Wang, Fuyue Wang, Guodong Cao, Yanqiu Zhou, Shunqing Xu, Zongwei Cai   +9 more
doaj   +1 more source

p-Phenylenediamine Derivatives in Tap Water: Implications for Human Exposure

Water
Human exposure to p-phenylenediamine derivatives (PPDs) may induce hepatotoxicity and altered glycolipid metabolism. Recent studies have demonstrated the wide presence of PPDs in environmental matrixes.
Jianqiang Zhu, Ruyue Guo, Fangfang Ren, Shengtao Jiang, Hangbiao Jin   +4 more
semanticscholar   +1 more source

Crystalline polyimides [PDF]

, 1979
Aromatic crystalline polyimides are disclosed that are synthesized from polyamide-acid and when heated to 200 C to 300 C become cyclized to afford an opaque polymer.
St.clair, A. K., St.clair, T. L.
core   +1 more source

p-Nitrophenyl ester of (diphenylphosphoryl)acetic acid as a reagent for the synthesis of 2-(phosphorylmethyl)benzimidazole

Журнал органічної та фармацевтичної хімії, 2020
Aim. To expand the synthetic potential of the activated esters of diphenylphosphorylacetic acid for the synthesis of phosphorylated benzimidazoles. Results and discussion.
Oleksandra O. Chaikovska, Radomyr V. Smaliy, Nataliya A. Shtyl, Oleksandr M. Кostyuk   +3 more
doaj   +1 more source

Characterization of the aggregation-induced enhanced emission of N,N'-bis(4-methoxysalicylide)benzene-1,4-diamine [PDF]

, 2015
© 2015 Springer Science+Business Media New York. N,N′-bis(4-methoxysalicylide)benzene-1,4-diamine (S1) was synthesized from 4-methoxysalicylaldehyde and p-phenylenediamine and it was found to exhibit interesting aggregation-induced emission enhancement ...
Mu, Lan, Redshaw, Carl, Wei, Gang, Wu, Fuyong, Xu, Guangjun, Zeng, Xi   +5 more
core   +1 more source

Alterations of human lipid profile and mitochondrial DNA copy number induced by PPD exposure

Ecotoxicology and Environmental Safety
As a class of industrial antioxidants, N, N’-substituted p-phenylenediamines (PPDs) find extensive application in rubber product stabilization, leading to significant human exposure and various toxic implications.
Chenchen Wang, Yi Xiong, Hongliang Zheng, Jianli Qu, Weili Mao   +4 more
doaj   +1 more source

N,N'-Diacetyl-p-phenylenediamine restores microglial phagocytosis and improves cognitive defects in Alzheimer's disease transgenic mice. [PDF]

Proc Natl Acad Sci U S A, 2019
Significance Microglial dysfunction accompanying the loss of phagocytic ability and the overexpression of neurotoxic factors presents a positive-feedback loop that contributes to the rapid progression of neurodegeneration.
Park MH, Lee M, Nam G, Kim M, Kang J, Choi BJ, Jeong MS, Park KH, Han WH, Tak E, Kim MS, Lee J, Lin Y, Lee YH, Song IS, Choi MK, Lee JY, Jin HK, Bae JS, Lim MH.   +19 more
europepmc   +2 more sources