Results 31 to 40 of about 3,455,784 (138)
An efficient method for LEED crystallography [PDF]
, 1990 Determination of periodic surface structures from analysis of LEED intensity data is usually based on the evaluation of continuous I/V-spectra for a large number of model structures for which all the structural parameters have to be refined ...
Clarke +26 more
core +1 more source
1,2-Bis(phenylphosphoryl)ethane [PDF]
, 2008 The geometric parameters of the molecule of the title compound, C14H16O2P2, are in the usual ranges. It is a meso compound with the two chiral P atoms having opposite configurations.
Dornhaus, Franz +2 more
core +1 more source
, 2008 The title compound, C18H15BrSi, crystallizes with two almost identical molecules (r.m.s. deviation for all non-H atoms = 0.074 Å) in the asymmetric unit. It is isomorphous with chlorotriphenylsilane. Key indicators: single-crystal X-ray study; T = 173 K;
Hannah Steinert +8 more
core +2 more sources
4,40-Dimethyl-2,20-bipyridinium dichloride [PDF]
, 2008 In the title compound, C12H14N22+·2Cl-, the 4,4'-dimethyl-2,2'-bipyridinium cation is essentially planar (r.m.s. deviation for all non-H atoms = 0.004 Å) and is located on a crystallographic inversion centre. The cations and chloride anions lie in planes
Bolte, Michael +2 more
core
The structure of atomic nitrogen adsorbed on Fe(100) [PDF]
, 1982 Nitrogen atoms adsorbed on a Fe(100) surface cause the formation of an ordered c(2 × 2) overlayer with coverage 0.5. A structure analysis was performed by comparing experimental LEED I–V spectra with the results of multiple scattering model calculations.
Bozso +19 more
core +1 more source
Consistent estimation of high-dimensional factor models when the factor number is over-estimated [PDF]
, 2020 A high-dimensional $r$-factor model for an $n$-dimensional vector time series is characterised by the presence of a large eigengap (increasing with $n$) between the $r$-th and the $(r+1)$-th largest eigenvalues of the covariance matrix.
Barigozzi, Matteo, Cho, Haeran
core +4 more sources
R Factor Transfer in Rhizobium leguminosarum [PDF]
Microbiology, 1974 SUMMARY: R factors of the compatibility class P were transferred between strains of Escherichia coli k12 and Rhizobium leguminosarum. These R factors were stable in R. leguminosarum and conferred similar levels of antibiotic resistance to those in the corresponding R+ E.
openaire +2 more sources
R-Factor elimination by thymine starvation
Genetical Research, 1971 SUMMARYR-factor 1818, which is refractory to curing by acridines or ethidium bromide fromEscherichia coliK 12 andKlebsiella aerogenes418 hosts, was eliminated from thymineless mutants of these organisms under conditions of thymine starvation. Neither R-7268 nor R-TEM could be eliminated by this method. The concurrence of R-TEM with R-1818 inhibited the
R J, Pinney, J T, Smith
openaire +2 more sources
The amount of energy used in a home is greatly impacted by the type of materials used in constructing the home. In particular, the thermal conductivity of the materials will affect how quickly heat is allowed to enter or leave the home.
John Pratte
core
Determining the structure of Ru(0001) from low-energy electron diffraction of a single terrace
, 2006 While a perfect hcp (0001) surface has three-fold symmetry, the diffraction patterns commonly obtained are six-fold symmetric. This apparent change in symmetry occurs because on a stepped surface, the atomic layers on adjacent terraces are rotated by 180
Baddorf +26 more
core +1 more source