Results 51 to 60 of about 323,461 (284)

Metal ligand vibrations of [Cd(nh3) 4] (re04]) 2 with 110Cd/116Cd and h/d isotopic substitution

Semina: Ciências Sociais e Humanas, 2010
Raman and ir. Spectra of [Cd(nh3) 4] (re04]) 2 with 110Cd/116Cd and h/d isotopic substitution have been obtained. The frequencies and isotopic shift for the framework of the [Cd(nh3) 4] (re04]) + 2 cation complex are reported.
Cláudio Alberto Tellez
doaj   +1 more source

Fusion pores with low conductance are cation selective

Cell Reports, 2021
Summary: Many neurotransmitters are organic ions that carry a net charge, and their release from secretory vesicles is therefore an electrodiffusion process.
Joannalyn B. Delacruz, Satyan Sharma, Shailendra Singh Rathore, Meng Huang, Joan S. Lenz, Manfred Lindau   +5 more
doaj   +1 more source

Sound velocity and density of magnesiowüstites: Implications for ultralow-velocity zone topography [PDF]

, 2017
We explore the effect of Mg/Fe substitution on the sound velocities of iron-rich (Mg_(1 – x)Fe_x)O, where x = 0.84, 0.94, and 1.0. Sound velocities were determined using nuclear resonance inelastic X-ray scattering as a function of pressure, approaching ...
Jackson, Jennifer M., Sturhahn, Wolfgang, Wicks, June K., Zhang, Dongzhou   +3 more
core   +2 more sources

Structural biology of ferritin nanocages

FEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

Achieving High Thermoelectric Performance in Rare-Earth Element-Free CaMg2Bi2 with High Carrier Mobility and Ultralow Lattice Thermal Conductivity

Research, 2020
CaMg2Bi2-based compounds, a kind of the representative compounds of Zintl phases, have uniquely inherent layered structure and hence are considered to be potential thermoelectric materials. Generally, alloying is a traditional and effective way to reduce
Muchun Guo, Fengkai Guo, Jianbo Zhu, Li Yin, Qian Zhang, Wei Cai, Jiehe Sui   +6 more
doaj   +1 more source

Synchrotron X-ray study of polycrystalline wurtzite Zn1-xMgxO (0 <= x <= 0.15): Evolution of crystal structure and polarization

, 2006
The effect of Mg-substitution on the crystal structure of wurtzite ZnO is presented based on synchrotron X-ray diffraction studies of polycrystalline Zn1-xMgxO (0
Kim, Young-Il, Page, Katharine, Seshadri, Ram   +2 more
core   +1 more source

Computer simulations of iron in magnesium silicate perovskite [PDF]

, 2008
We use atomistic computer simulation techniques to investigate the site partitioning of iron in (Mg,Fe)SiO_{3} perovskites. Our calculations predict that the most energetically favourable reaction for iron substitution will be a direct exchange of Fe^{2+}
Price, GD, Wright, K
core   +1 more source

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

d-Orbital steered active sites through ligand editing on heterometal imidazole frameworks for rechargeable zinc-air battery

Nature Communications, 2020
Low intrinsic activity and accessibility of active sites limit the application of metal-organic framework as catalyst for Zn-air battery. Here, authors present a cation substitution strategy to regulate the electronic state of metal sites and modify its ...
Yi Jiang, Ya-Ping Deng, Ruilin Liang, Jing Fu, Rui Gao, Dan Luo, Zhengyu Bai, Yongfeng Hu, Aiping Yu, Zhongwei Chen   +9 more
doaj   +1 more source

Three water sites in upper mantle olivine and the role of titanium in the water weakening mechanism [PDF]

Infrared spectroscopy on synthetic olivines has established that there are at least four different mechanisms by which hydrogen is incorporated into the crystal structure.
Berry, A. J., Hermann, J., O'Neill, H. S., Walker, A. M.   +3 more
core   +1 more source