Vibrational properties of uracil

Abstract

A semiempirical molecular dynamics model is developed to study the vibrational frequencies of uracil at very low kinetic temperature by using the Fourier transform of velocity autocorrelation function of trajectories of molecular dynamics simulations. The finite difference harmonic method is used to assign the vibrational frequency of each mode. The calculated frequencies are found to be in good agreement with experimental measurements. Moreover, we make up for the lost vibrational modes in experiments self-consistently. A total of 30 vibrational modes and their corresponding frequencies are reported.

Study on Integrated Climatic Index for Low Temperature Injury of Loquat in Putian

“…Putian city in Fujian province is located in the low mountains and hills in the central coastal, belong to typical subtropical marine monsoon climate, the temperature is moderate, winter is not too cold, summer is not too hot, water and heat resources are rich, and the distribution of theirs is good, the light is in full. Putian is the main production base of loquat in China [1]. The planting area of loquat reached 300000 mu, which accounts for a quarter of the national planting area, the yield of loquat was nearly 80000 tons, accounting for one-third of the national yield.…”