Results 81 to 90 of about 9,679,616 (302)

Mechanical Programming of PEGDA‐β‐CD Polyrotaxane‐Based Hydrogels via Host–Guest Molecular Recognition

Advanced Functional Materials, EarlyView.
A mechanically programmable hydrogel for tissue engineering is developed by modulating the molecular threading density of poly(ethylene glycol) diacrylate‐β‐cyclodextrin (PEGDA‐β‐CD) polyrotaxane and combining it with β‐CD‐modified gelatin. The polyrotaxane‐guided transition from disordered pores to laminar microstructures enables precise tuning ...
Shiyi Chen, Xudan Xing, Haopu Su, Dominik Voll, Xiaohe Xu, Jiafeng Wan, Tongtong Cui, Christian W. Schmitt, Stefan Bräse, Peng Li, Patrick Théato   +10 more
wiley   +1 more source

Bias of ostracod stable isotope data caused by drying of sieve residues from water [PDF]

, 2007
Stable isotope analysis of ostracod shells is used routinely for palaeoenvironmental studies of ostracod-bearing records. Sample treatment usually involves the disaggregation of sediments and sieving; before the sieving residues were washed with water ...
Börner, Anko, Mischke, Steffen, Zhang, Chengjun   +2 more
core   +1 more source

Non-linear dependence of ion heat flux on plasma density at the L–H transition of JET NBI-heated deuterium–tritium plasmas

Nuclear Fusion
Recent JET D–T campaigns opened the possibility of unique isotope studies to investigate the L–H transition physics in view of reactor plasmas and to study the origin of the observed power threshold minimum.
P. Vincenzi, E.R. Solano, E. Delabie, C. Angioni, G. Birkenmeier, C. Maggi, R.B. Morales, H.J. Sun, E. Tholerus, JET Contributors   +9 more
doaj   +1 more source

Isotope effects observed in diluted D2O/H2O mixtures identify HOD-induced low-density structures in D2O but not H2O

Scientific Reports, 2022
Normal and heavy water are solvents most commonly used to study the isotope effect. The isotope effect of a solvent significantly influences the behavior of a single molecule in a solution, especially when there are interactions between the solvent and ...
Anna Stefaniuk, Sylwester Gawinkowski, Barbara Golec, Aleksander Gorski, Kosma Szutkowski, Jacek Waluk, Jarosław Poznański   +6 more
doaj   +1 more source

Water Organization and Hydration‐Dependent Hydroxide Transport in Anion Exchange Membranes (AEM)

Advanced Functional Materials, EarlyView.
Hydroxide transport in anion exchange membranes is governed by the organization of water within the polymer rather than by hydration alone. A hydration‐window framework is presented to unify transport, swelling, and mechanical stability, providing guidance for designing durable membranes for fuel cells and other hydroxide‐based electrochemical ...
Phumlani F. Msomi
wiley   +1 more source

Ion Beam Analysis of Hydrogen Isotope Effect at Ti-Mo Interdiffusion Interface

Yuanzineng kexue jishu, 2022
In order to explore the effect of Ti-Mo interdiffusion on metal hydrogen absorption, hydrogen absorption isotope effects at the TiMo alloy due to the interdiffusion at interface were investigated by using ion beam analysis (IBA) which is a non ...
DUAN Yiming;LI Cong;ZHANG Weiguang;WANG Meng;SHI Liqun
doaj  

Chlorine Isotope Effects from Isotope Ratio Mass Spectrometry Suggest Intramolecular C-Cl Bond Competition in Trichloroethene (TCE) Reductive Dehalogenation

Molecules, 2014
Chlorinated ethenes are prevalent groundwater contaminants. To better constrain (bio)chemical reaction mechanisms of reductive dechlorination, the position-specificity of reductive trichloroethene (TCE) dehalogenation was investigated.
Stefan Cretnik, Anat Bernstein, Orfan Shouakar-Stash, Frank Löffler, Martin Elsner   +4 more
doaj   +1 more source

Nitrogen Isotope Fractionation During Archaeal Ammonia Oxidation: Coupled Estimates From Measurements of Residual Ammonium and Accumulated Nitrite

Frontiers in Microbiology, 2020
The naturally occurring nitrogen (N) isotopes, 15N and 14N, exhibit different reaction rates during many microbial N transformation processes, which results in N isotope fractionation. Such isotope effects are critical parameters for interpreting natural
Maria Mooshammer, Ricardo J. E. Alves, Barbara Bayer, Michael Melcher, Michaela Stieglmeier, Lara Jochum, Simon K.-M. R. Rittmann, Margarete Watzka, Christa Schleper, Gerhard J. Herndl, Gerhard J. Herndl, Wolfgang Wanek   +11 more
doaj   +1 more source

Electrochemical Pathways for Nitrate Conversion to Ammonia: From Environmental Challenges to Ammonia Economy

Advanced Functional Materials, EarlyView.
This perspective presents recent advances in electrocatalytic nitrate reduction, focusing on reaction mechanisms, catalyst design, and electrolyzer configurations. Key challenges in selectivity, stability, and practical wastewater treatment are highlighted, while future directions for advancing sustainable ammonia synthesis and nitrate remediation are ...
Xintong Li, Yunpeng Zuo, Xiaoran Zhang, Jieqiong Shan, Kenneth Mei Yee Leung, Bin Liu, Peter Strasser, Adrian Fisher, Zonglong Zhu, Xin Wang   +9 more
wiley   +1 more source

An isotope study of the felsic units of the Bushveld Large Igneous Province, South Africa [PDF]

, 2010
Includes abstract.An O, H, Sr and Nd isotope study was carried out on the ~ 2059 Ma Bushveld granites and granophyres.
Fourie, Duane
core   +1 more source