The first-order phase transition in the one-dimensional q-state Potts model with long-range interactions decaying with distance as 1/r 1+σ has been studied by Monte Carlo numerical simulations for 0 < σ ≤ 1 and integer values of q > 2. On the basis of finite-size scaling analysis of interface free energy ∆F L , specific heat and Binder's fourth order cumulant, we obtain the first-order transiti...

Cation-p interactions in protein structures are identified and evaluated by using an energy-based criterion for selecting significant sidechain pairs. Cation-p interactions are found to be common among structures in the Protein Data Bank, and it is clearly demonstrated that, when a cationic sidechain (Lys or Arg) is near an aromatic sidechain (Phe, Tyr, or Trp), the geometry is biased toward on...

mangrove sediments were collected during wet and dry seasons from nine stations in khamir,laft and natural reservoir mangrove-dense areas of hormozgan province in the south of iran. σ pcbs ranged from 5.33 to 15.5 ng/g dry weight and the dominant congener was no.153. average σ ddts for khamir and laft mangroves were 16.58 ± 1.51 and 18.8 ± 9.98 ng/g dry weight. ddt was more abundant than dde an...

mangrove sediments were collected during wet and dry seasons from nine stations in khamir,laft and natural reservoir mangrove-dense areas of hormozgan province in the south of iran. σ pcbs ranged from 5.33 to 15.5 ng/g dry weight and the dominant congener was no.153. average σ ddts for khamir and laft mangroves were 16.58 ± 1.51 and 18.8 ± 9.98 ng/g dry weight. ddt was more abundant than dde an...