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We present accurate element abundance patterns based on the non-localthermodynamic equilibrium (non-LTE, NLTE) line formation for 14 chemicalelements from He to Nd for a sample of nine A9 to B3 type stars with welldetermined atmospheric parameters and low rotational velocities. We constructednew model atom of Zr II-III and updated model atoms for Sr II and Ba II byimplementing the photoionization cross sections from calculations with theDirac B-spline R-matrix method. The NLTE abundances of He to Fe in the starsHD~17081, HD~32115, HD~160762, and HD~209459 are found to be consistent withthe solar abundances, and HD~73666 being a Blue Struggler does not revealdeviations from chemical composition of the Praesepe cluster. Three of thesestars with an effective temperature of lower than 10500~K have supersolarabundances of Sr, Zr, Ba, and Nd, and our results suggest the presence of apositive correlation between stellar effective temperature and abundance. Foreach star, enhancement of Ba is higher than that for any other heavy element.We propose that the solar Ba abundance is not representative of the galactic Baabundance at modern epoch. The status of HD~145788 was not clarified: this starhas solar abundances of C to Si and enhancements of Sr to Ba similar to thatfor superficially normal stars of similar temperature, while overabundant Ca,Ti, and Fe. The NLTE abundances of Vega support its status of a mildlambda~Bootis star.

Chemical diversity among A-B stars with low rotational velocities: non-LTE abundance analysis