Results 51 to 60 of about 25,120 (256)

Método colorimétrico para determinação de dióxido de nitrogênio atmosférico com preconcentração em coluna de c-18

Química Nova, 2002
An alternative analytical method for nitrogen dioxide (NO2) in atmosphere was developed. The collection of NO2 is performed by a Sep-Pack C-18 cartridge impregnated with 11% (v/v) of triethanolamine plus 3,6 % (v/v) of ethylene glycol plus 25 % (v/v) of ...
Ugucione Cássia, Gomes Neto José de Anchieta, Cardoso Arnaldo Alves   +2 more
doaj  

Setting time, compressive strength, and microstructural characterization of high early strength cement mortars containing metakaolin, calcium nitrate and triethanolamine

Frontiers in Built Environment
The experimental investigation encompassed the development of predictive models for the setting time and compressive strength of high early strength cement mortars (HESCM) incorporating metakaolin (MK), calcium nitrate (Ca(NO3)2), and triethanolamine ...
Polipati Ananyachandran, Manikandan Periyasamy, Avuluri Vijaya Bhaskar, M. Helen Santhi, U. Johnson Alengaram, V. Vasugi   +5 more
doaj   +1 more source

The Effects of Various Additive Components on the Sound Absorption Performances of Polyurethane Foams

Advances in Materials Science and Engineering, 2015
Flexible polyurethane (PU) foams comprising various additive components were synthesized to improve their acoustic performances. The purpose of this study was to investigate the effects of various additive components of the PU foams on the resultant ...
Shuming Chen, Yang Jiang, Jing Chen, Dengfeng Wang   +3 more
doaj   +1 more source

Influence of various cosolvents on the calcium oxide-catalyzed ethanolysis of sunflower oil [PDF]

Journal of the Serbian Chemical Society, 2019
Ten organic solvents (triethanolamine, diethanolamine, ethylene glycol, methyl ethyl ketone, n-hexane, triethylamine, ethylene glycol dimethyl ether, glycerol, tetrahydrofuran and dioxane) were applied as cosolvents in the CaO-catalyzed ethanolysis of ...
Đokić-Stojanović Dušica R., Todorović Zoran B., Troter Dragan Z., Stamenković Olivera S., Veselinović Ljiljana M., Zdujić Miodrag V., Manojlović Dragan D., Veljković Vlada B.   +7 more
doaj   +1 more source

4D Materials of Tough and Rapid Thermoresponsive Hydrogel by PET‐RAFT Polymerization

Journal of Applied Polymer Science, EarlyView.
NIPAm‐containing bilayer hydrogels using a novel hydrogel formation method utilizing oxygen‐tolerant PET‐RAFT polymerization to investigate their temperature‐responsive behavior. The material properties strongly depend on NIPAm concentration and polymer density. Finally, we demonstrated a model gripper with optimized compositions.
Chanhyuk Jee, Mina Shigeyama, Kakeru Ohbayashi, Ken Kojio, Hikaru Matsumoto, Masanori Nagao, Yoshiko Miura   +6 more
wiley   +1 more source

The Role of Chemical Activation in Strengthening Iron Ore Tailings Supplementary Cementitious Materials

Buildings
The preparation of iron ore tailings (IOTs) into supplementary cementitious materials (SCMs) is an effective approach to achieve value-added utilization of industrial solid waste.
Zhihang Hu, Xiaowei Gu, Baojun Cheng, Qing Wang, Jianping Liu, Xiaowei Ge, Shiqi Yin   +6 more
doaj   +1 more source

Unlocking Enhanced Hydrogen Storage in Naphthalene via K‐Induced Acidity and Metal Dispersion in Dendritic Catalysts

Carbon and Hydrogen, EarlyView.
Dendritic micro‐mesoporous composite catalysts through K‐induced enhancement of acidity and metal dispersion were developed. ABSTRACT Novel dendritic ZSM‐22/DMSNs (ZD) micro‐mesoporous composites with center–radial pore structure and suitable acidity were developed by nano‐assembly strategy. Subsequently, Pt/ZD‐K catalysts were synthesized based on the
Dongze Li, Liang Qiao, Yutong Zou, Chunhui Zhou, Zhentao Liu, Penglei Ni, Xiaochun Zhu, Chunya Wang, Chunming Xu, Xilong Wang   +9 more
wiley   +1 more source

A travel though the atrane route, a versatile tool for the materials soft‐synthesis: A twenty‐five years perspective

Nano Select
The use of triethanolamine in the preparation of materials has been a fertile area of research during the last decades. It is used in sol‐gel synthesis because of its ability to regulate pH, act as a structure‐directing agent, and form atrane complexes ...
María Dolores Garrido, Miriam Benítez, Jose V. Ros‐Lis, Pedro Amorós   +3 more
doaj   +1 more source

Safety assessment of the substance (triethanolamine‐perchlorate, sodium salt) dimer, for use in food contact materials

EFSA Journal, 2020
The EFSA Panel on Food Contact Materials, Enzymes and Processing Aids (CEP) assessed the safety of the substance (triethanolamine‐perchlorate, sodium salt) dimer, FCM substance No 1080, intended to be used as a thermal stabiliser at up to 0.15% w/w in ...
EFSA Panel on Food Contact Materials, Enzymes and Processing Aids (CEP), Vittorio Silano, José Manuel Barat Baviera, Claudia Bolognesi, Andrew Chesson, Pier Sandro Cocconcelli, Riccardo Crebelli, David Michael Gott, Konrad Grob, Claude Lambré, Evgenia Lampi, Marcel Mengelers, Alicja Mortensen, Inger‐Lise Steffensen, Christina Tlustos, Henk Van Loveren, Laurence Vernis, Holger Zorn, Laurence Castle, Emma Di Consiglio, Roland Franz, Nicole Hellwig, Maria Rosaria Milana, Karla Pfaff, Eric Barthélémy, Gilles Rivière   +25 more
doaj   +1 more source

Boosting Electron‐Hole Charge Separation in CO2 Photoreduction through Fluoroporphyrin‐Linked Nickel(II)‐Acetylide Frameworks

Carbon Energy, EarlyView.
A NiII‐acetylide framework, H2TFPP‐Ni‐AF, demonstrates outstanding photocatalytic CO2 reduction performance: 13.16 mmol h−1 g−1 of CO with 97.9% selectivity. Synergistic interactions, including d‐p orbital hybridization within NiII‐bis(acetylide) moieties ( − C ≡ C−NiII(PBu3)2 − C ≡ C − ) and the efficient charge transport afforded by π‐conjugated ...
Lifen Chen, Lian Duan, Yidi Wang, Yasuteru Shigeta, Kowit Hengphasatporn, Linli Xu, Wai‐Yeung Wong   +6 more
wiley   +1 more source