Results 31 to 40 of about 5,170,686 (370)

Indole-3-Carboxylic Acid Enhanced Anti-cancer Potency of Doxorubicin via Induction of Cellular Senescence in Colorectal Cells [PDF]

open access: yesActa Poloniae Pharmaceutica
Background: Colorectal cancer (CRC) is the most common gastrointestinal malignancy. Doxorubicin (DOX) is a widely utilized chemotherapy drug, but its efficacy is limited due to dose-dependent toxicity.
Yao Zhou   +4 more
doaj   +1 more source

Enabling Heterogeneous Catalysis to Achieve Carbon Neutrality: Directional Catalytic Conversion of CO$_2$ into Carboxylic Acids [PDF]

open access: yesarXiv, 2022
The increase in anthropogenic carbon dioxide (CO$_2$) emissions has exacerbated the deterioration of the global environment, which should be controlled to achieve carbon neutrality. Central to the core goal of achieving carbon neutrality is the utilization of CO$_2$ under economic and sustainable conditions.
arxiv  

Bromopyrrole alkaloids from the caribbean sponge Agelas cerebrum

open access: yesQuímica Nova, 2011
Bioguided fractionation of Agelas cerebrum crude extract resulted in isolation of four bromopyrrole and four bromopyrrole aminoimidazole alkaloids, identified as 5-bromopyrrole-2-carboxylic acid (1), 4-bromopyrrole-2-carboxylic acid (2), 3,4-bromopyrrole-
Erik L. Regalado   +4 more
doaj   +1 more source

Ringed spherulitic and undulated textures in the nematic phase of a mixture of trans-4-hexylcyclohexanecarboxylic and benzoic acids [PDF]

open access: yesPhase Transitions, Volume 82, Issue 8 August 2009 , pages 620 - 631, 2009
We present a polarising optical microscopy study of a liquid-crystal mixture of trans-4-hexylcyclohexanecarboxylic acid (C6) and benzoic acid. Both materials have carboxylic groups that can form dimers through hydrogen bonding. The mixture is nematic and room temperature and has the clearing point at 88 Celsius.
arxiv   +1 more source

Chiral Carboxylic Acid Enabled Achiral Rhodium(III)-Catalyzed Enantioselective C-H Functionalization.

open access: yesAngewandte Chemie, 2018
Reported is an achiral Cpx RhIII /chiral carboxylic acid catalyzed asymmetric C-H alkylation of diarylmethanamines with a diazomalonate, followed by cyclization and decarboxylation to afford 1,4-dihydroisoquinolin-3(2H)-one. Secondary alkylamines as well
Luqing Lin   +5 more
semanticscholar   +1 more source

Heterocycles [h]-Fused Onto 4-Oxoquinoline-3-Carboxylic Acid, Part VIII [1]. Convenient Synthesis and Antimicrobial Properties of Substituted Hexahydro[1,4]diazepino[2,3-h]quinoline-9-carboxylic acid and Its Tetrahydroquino[7,8-b]benzodiazepine Analog

open access: yesMolecules, 2008
[1,4]Diazepino[2,3-h]quinolone carboxylic acid 3 and its benzo-homolog tetrahydroquino[7,8-b]benzodiazepine-3-carboxylic acid 5 were prepared via PPAcatalyzed thermal lactamization of the respective 8-amino-7-substituted-1,4-dihydroquinoline-3-carboxylic
Yusuf M. Al-Hiari   +2 more
doaj   +1 more source

5,6-dihydroxyindole-2-carboxylic acid (DHICA): a First Principles Density-Functional Study [PDF]

open access: yesChem. Phys. Lett. 402, 111 (2005)., 2004
We report first principles density functional calculations for 5,6-dihydroxyindole-2-carboxylic acid (DHICA) and several reduced forms. DHICA and 5,6-dihydroxyindole (DHI) are believed to be the basic building blocks of the eumelanins. Our results show that carboxylation has a significant effect on the physical properties of the molecules.
arxiv   +1 more source

Diamondoids are not forever: microbial biotransformation of diamondoid carboxylic acids

open access: yesMicrobial Biotechnology, 2020
Summary Oil sands process‐affected waters (OSPW) contain persistent, toxic naphthenic acids (NAs), including the abundant yet little‐studied diamondoid carboxylic acids.
Benjamin D. Folwell   +2 more
doaj   +1 more source

Valorization of Lignin by Partial Wet Oxidation Using Sustainable Heteropoly Acid Catalysts

open access: yesMolecules, 2017
The production of carboxylic acids by partial wet oxidation of alkali lignin at elevated temperatures and pressures was studied experimentally. Two different heteropoly acids, phosphotungstic acid (H3PW12O40) and phosphomolybdic acid (H3PMo12O40), were ...
Abayneh Getachew Demesa   +3 more
doaj   +1 more source

Nonlinear optical properties of mono-functional 1,2-dihydro-1,2-methanofullerene[60]-61-carboxylic acid /polymer composites [PDF]

open access: yesChem. Phys. Lett. 369 (2003) 281-286, 2002
By using nanosecond laser pulses at 532-nm wavelength, we have studied the nonlinear optical properties of composites which consist of mono-functional 1,2-dihydro-1,2-methanofullerene[60]-61-carboxylic acid (FCA) and poly(styrene-co-4-vinylpyridine).
arxiv   +1 more source

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