Using perturbed-angular-correlation ~PAC! spectroscopy, via the Hf→Ta probe, we have measured Mn-site electric-field gradients ~EFG’s! at Ta nuclei in ceramic samples of LaMnO3. Two crystallographic phases coexist over a temperature interval of '16 K near the orthorhombic-to-rhombohedral transition at '724 K, which shows a thermal hysteresis of '1.760.2 K. Concurrently, in the two phases, we de...

An Escherichia coli gene which is able to complement "ammonia-dependent growth" (adgA) mutations in Rhodobacter capsulatus was previously isolated from an R-prime plasmid and was shown to be located between 34 and 39 min on the E. coli chromosome (3). In the present study, a 10.9-kb HindIII-PstI fragment of genomic DNA was cloned from E. coli HB101 and shown to complement adgA mutations in R. c...

The meshless element-free Galerkin method was generalized and an algorithm was developed for 3D dynamic modeling of deformable bodies in real time. The efficacy of the algorithm was investigated in a 3D linear viscoelastic model of human spleen subjected to a time-varying compressive force exerted by a surgical grasper. The model remained stable in spite of the considerably large deformations o...

the structural stabilities, geometry and electronic properties of c24 and some its heterofullerenederivatives are compared at the b3lyp/6-311-efg**//b3lyp/6-31+g* level of theory. vibrationalfrequency calculations show that all the systems are true minima. the calculated binding energies ofheterofullerenes show c24 as the, most stable fullerenes by 9.03ev/atom. while decreasing bindingenergy in...