Results 41 to 50 of about 827,770 (161)

Synthetic Derivatives of Natural Alkaloid Harmine

Eurasian Chemico-Technological Journal, 2009
The indole alkaloid harmine was extracted from underground part of Peganum harmala L. With the purpose of obtaining the new biological active derivatives on base of alkaloid harmine the chemical modification was carried out.
M. M. Ismagulova, Zh. S. Nurmaganbetov, A. Zh. Turmukhambetov, T. S. Seitembetov, S. M. Adekenov   +4 more
doaj   +1 more source

Circular and Bio‐Sourced Polymers for Energy Applications: Natural Feedstocks, Recycling, and Upcycling Routes

EcoEnergy, EarlyView.
This review provides a critical comparative analysis of circular and bio‐sourced polymers for energy storage, systematically evaluating natural feedstocks alongside recycling and upcycling strategies for battery components. Key structure–property–performance relationships and inherent trade‐offs between sustainability metrics and electrochemical ...
Priyank Sinha, Amul Jain, Koushik Mahata, Sanjib Banerjee   +3 more
wiley   +1 more source

Loss of CO₂ from Monodeprotonated Phthalic Acid upon Photodissociation and Dissociative Electron Detachment

, 2021
The decarboxylation (CO2 loss) mechanism of cold monodeprotonated phthalic acid was studied in a photodissociation action spectrometer by quantifying mass-selected product anions and neutral particles as a function of the excitation energy.
Jennifer A. Noble, Claude Dedonder-Lardeux, Ernesto Marceca (1953796), Ernesto Marceca, Christophe Jouvet, Jennifer A. Noble (4735377), Claude Dedonder-Lardeux (1325442), Christophe Jouvet (1303305)   +7 more
core   +1 more source

Optical properties in the UV and visible spectral region of organic acids relevant to tropospheric aerosols [PDF]

Atmospheric Chemistry and Physics, 2004
Refractive and absorption indices in the UV and visible region of selected aqueous organic acids relevant to tropospheric aerosols are reported. The acids investigated are the aliphatic dicarboxylic acids oxalic, malonic, tartronic, succinic and glutaric
C. E. Lund Myhre, C. J. Nielsen
doaj  

Lattice‐Strained Cu2O‐Ni/NiO Heterostructure Enables Selective Electrocatalytic C–C Coupling of Alcohols to Cinnamaldehyde in Aqueous Medium

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This study achieved the selective oxidation C–C coupling of PhCH2OH with EtOH to form cinnamaldehyde (CAL) on a designed Cu2O‐Ni/NiO heterojunction catalyst. By employing a salt precipitation strategy to balance the pH and cation concentration, an 86% conversion rate of PhCH2OH and a 67% high selectivity for CAL were realized.
Tian Cheng, Kaizhi Gu, Jiani Liu, Yujing Liu, Jianlong Wei, Zhaoling Ma, Hengyue Xu, Jia Zhang, Hanwen Liu, Yiqiong Zhang, Shuangyin Wang   +10 more
wiley   +1 more source

Introducing a ramped pyrolysis/oxidation‐14CO2 analysis system operated with mobile molecular sieve traps

Limnology and Oceanography: Methods, EarlyView.
Abstract A novel instrument for the thermal degradation of sedimentary organic matter was set up at the Alfred Wegener Institute (AWI) in Bremerhaven, Germany, with the aim of enabling Ramped Pyrolysis/Oxidation‐14C analysis as direct CO2 gas measurement.
Laura Kattein, Malte Höhn, Hendrik Grotheer, Torben Gentz, Gesine Mollenhauer   +4 more
wiley   +1 more source

gamma-Radiation and H2O2 induced oxidative dissolution of uranium(iv) oxide in aqueous solution containing phthalic acid

, 2020
This study aims to reveal possible involvements of organic acids in the oxidative dissolution of UO2. Using phthalic acid as a model compound, we have measured adsorption on UO2 and investigated effects on the reaction between H2O2 and UO2 and on ...
Kumagai, Yuta,, Jonsson, Mats,
core   +1 more source

Concentrations of higher dicarboxylic acids C₅–C₁₃ in fresh snow samples collected at the High Alpine Research Station Jungfraujoch during CLACE 5 and 6 [PDF]

Atmospheric Chemistry and Physics, 2009
Samples of freshly fallen snow were collected at the high alpine research station Jungfraujoch (Switzerland) in February and March 2006 and 2007, during the Cloud and Aerosol Characterization Experiments (CLACE) 5 and 6. In this study a new technique has
K. Sieg, G. K. Moortgat, E. Fries, J. Williams, M. Kippenberger, R. Winterhalter   +5 more
doaj  

A Bifunctional UiO‐66 Platform Enabled by Schiff‐Base Engineering for CO2 Conversion and Epoxide–Anhydride Copolymerization

Small, EarlyView.
Bifunctional UiO‐66‐Schiff‐base‐M(II) (M = Zn, Cu, Ni) MOF catalysts enable efficient and selective epoxide/anhydride copolymerization and CO2/epoxide coupling under mild conditions. The catalysts feature tunable Lewis acidity, high recyclability, and structural robustness, offering a sustainable platform for green polymer synthesis and carbon dioxide ...
Chen‐Yen Tsai, Shih‐Yun Chou
wiley   +1 more source

Adsorption Characteristics of Benzene Carboxylic Acids from Aqueous Solution by Zr(IV)-loaded Collagen Fiber

工程科学与技术, 2010
:A novel adsorbent, Zr(IV)-loaded collagen fiber (ZLCF), was prepared and its adsorption characteristics to benzoic acid (BA), o-phthalic acid (o-PA), p-phthalic acid (p-PA) and m-phthalic acid (m-PA) from aqueous solution were investigated. It was found
Gu Yingchun, Liao Xuepin, Shi Bi
doaj