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Calculation of the excited states properties of pigment complexes is one of the key problems in the photosynthesis research. The excited states of LH1 complex of Thermochromatium tepidum were studied by means of the high-precision quantum chemistry methods. The influence of different parameters of the calculation procedure was examined. The optimal scheme of calculation was chosen by comparison of calculated results with the experimental data on absorption, electronic and magnetic circular dichroism spectra. The high importance of the account of the second excited states of bacteriochlorophylls and of site heterogeneity was shown. © 2018 Wiley Periodicals, Inc.

The eriophyoid mites are tiny but ancient and very diverse-over 5000 species have been named and described so far (Chetverikov et al. 2015;Bolton et al. 2017;Xue et al. 2017). They have received tremendous attention from acarologists over the last two decades or so. Major books-such as world catalogue (Amrine & Stasny 1994), key to genera (Amrine et al. 2003) and volumes of comprehensive review articles on its taxonomy, biology and control (Lindquist et al. 1996;Ueckermann 2010)-have facilitated the discovery and study of these mites in recent years. Surveys of new mite species described during 2007 to 2015 revealed that more new species of this superfamily have been described than any other mite superfamily (

The carotenoid molecules such as lutein play an important role in the absorption of light and the following transfer of energy during photosynthesis. However, the study of these processes by the experimental methods only is quite difficult because some of the transitions between the electronic states of carotenoids are optically forbidden and the effect of vibrational states change also must be taken into account. In the present work, electronic-vibrational states of the lutein molecule in the LHCII complex of higher plants and in the diethyl ether solution were described using the ab initio methods. For lutein of LHCII, the electronic energy transfer processes were modeled. The role of the “hot” S1 states of lutein was shown to be of great importance.