Results 81 to 90 of about 449,097 (372)
Point groups in crystallography [PDF]
Acta Crystallographica Section A Foundations of Crystallography, 2008 Two dual spaces are extensively used in crystallography: the point space E n , hosting the crystal pattern; and the vector space V n , where face normals and reciprocal-lattice vectors are defined. The term "point group" is used in crystallography to indicate four different types of groups in these two spaces.
Nespolo, Massimo, Souvignier, Bernd
openaire +8 more sources
Unraveling the long-pursued Au144 structure by x-ray crystallography
Science Advances, 2018 A mysterious, long-pursued structure of a nanocluster-nanocrystal transition-sized nanoparticle is unraveled. The transition from nanocluster to nanocrystal is a central issue in nanoscience.
Nan Yan +6 more
semanticscholar +1 more source
Elastic‐Wave Propagation in Chiral Metamaterials: A Couple‐Stress Theory Perspective
Advanced Engineering Materials, EarlyView.The intrinsic chirality of chiral metamaterials renders an effective medium based on the classical continuum theory ineffective for predicting their acoustic activity. This limitation is addressed in the present study by employing augmented asymptotic homogenization to derive a couple‐stress‐based effective medium, enabling accurate predictions in the ...
Shahin Eskandari +5 more
wiley +1 more source
A Simple Technique to Improve Microcrystals Using Gel Exclusion of Nucleation Inducing Elements
Crystals, 2018 A technique is described for generating large well diffracting crystals from conditions that yield microcrystals. Crystallization using this technique is both rapid (crystals appear in <1 h) and robust (48 out of 48 co-crystallized with a fragment ...
Adafih Blackburn +9 more
doaj +1 more source
Journal of Cheminformatics, 2018 Computer descriptions of chemical molecular connectivity are necessary for searching chemical databases and for predicting chemical properties from molecular structure.
M. Quirós +4 more
semanticscholar +1 more source
Advanced Engineering Materials, EarlyView.Refractory high‐entropy alloys have attracted substantial attention for future ultrahigh‐temperature structural applications. Here the progression of key phase transformations in AlMo0.5NbTa0.5TiZr is established and correlated to the mechanical performance, highlighting the importance of the B2 phase.
George J. Wise +5 more
wiley +1 more source
Atroposelective Arene‐Forming Alkene Metathesis**
Angewandte Chemie, Volume 134, Issue 51, December 19, 2022., 2022 The feasibility of alkene metathesis to catalytically control stereogenic axes by traceless arene formation is reported. Key to the process is a selective conversion of stereodynamic trienes by a chiral molybdenum catalyst, providing configurationally‐stable atropisomers under mild conditions in excellent yields with up to 98 : 2 e.r.
Zlatko Jončev, Christof Sparr
wiley +2 more sources
The structure of protein molecules : in celebration of the International Year of Crystallography, 2014 [PDF]
, 2014 Many people, including laymen, are aware of the double helical nature of the DNA molecule. A few may actually realise that it was the technique of X-ray crystallography that was the key to solving this structure.
Bonetta, Rosalin +4 more
core +1 more source
Crystals, 2017 Due to the unique capacity for structural control, high magnetic fields (HMFs) have been widely applied to the solidification process of alloys. In zinc-based alloys, the primary zinc-rich crystals can be dendritic or needle-like in two dimensions.
Lei Li +8 more
doaj +1 more source
Veterinární Medicína, 2021 A seven-year-old male cat that was previously diagnosed with - and treated for - left hydronephrosis due to suspected idiopathic proteinaceous materials in the renal pelvis, presented with a short history of anorexia and vomiting.
Junyoung Kim +4 more
doaj +1 more source