Using the replica-exchange molecular dynamics method (REMD), we have investigated the size dependence of the melting behavior of iron nanoparticles. Comparing to conventional molecular dynamics (MD), the REMD method is found to be very efficient in determining the melting point by avoiding superheating and undercooling phenomena. With accurate determination of the melting point, we find that th...

We present a phenomenological model of melting in nanoparticles with facets that are only partially wet by their liquid phase. We show that in this model, as the solid nanoparticle seeks to avoid coexistence with the liquid, the microcanonical melting temperature can exceed the bulk melting point, and that the onset of coexistence is a first-order transition. We show that these results are cons...

We investigate an extension of the lattice model of melting of semiflexible polymers originally proposed by Flory. Along with a bending penalty epsilon, present in the original model and involving three sites of the lattice, we introduce an interaction energy epsilon (p), corresponding to the presence of a pair of parallel bonds and an interaction energy epsilon (h), associated with a hairpin t...

A full scale snow melting system with heat pipe technology is built in this work, which avoids the negative effects on concrete structure and environment caused by traditional deicing chemicals. The snow melting, ice-freezing performance and temperature distribution characteristics of heat pipe concrete runway were discussed by the outdoor experiments. The results show that the temperature of t...

We report a molecular dynamics simulation of melting of tungsten (W) nanoparticles. The modified embedded atom method (MEAM) interatomic potentials are used to describe the interaction between tungsten atoms. The melting temperature of unsupported tungsten nanoparticles of different sizes are found to decrease as the size of the particles decreases. The melting temperature obtained in the prese...

UNLABELLED MELTING computes the enthalpy and entropy of an oligonucleotide duplex helix-coil transition, and then its melting temperature. The program uses the method of nearest-neighbours. The set of thermodynamic parameters can be easily customized. The program provides several correction methods for the concentration of salt. MELTING is a free program, available at no cost and open-source. P...

Fluorescent nucleic acid detection in polymerase chain reaction (PCR) generally uses oligonucleotide probes labeled with covalently attached dyes. However, unlabeled oligonucleotides in the presence of saturating DNA dyes can also serve as hybridization probes. The DNA dye, LCGreen Plus, and a 3'-blocked unlabeled probe are added before amplification, and asymmetric PCR is performed at a 1:5 to...

Crystal growth experiments (micro-pulling down or Czochralski methods, respectively) and DTA/TG measurements with Fe containing olivines (fayalite–forsterite solid solution) and with FeO (wustite) are performed. For both substances the oxygen partial pressure pO2 of the growth atmosphere had to be adjusted within the stability region of Fe 2+ for all temperatures ranging from room temperature t...