The five known lactones matricarin, austricin, canin, and achillin guaianolides and argolide germacranolide and the two flavonoids eupatilin and its 7-O-methyl ester were isolated for the first time from the aerial part of ...

We propose and evaluate an approach for simulating vibronic pro®les in two-photon absorption (TPA) of polyatomic molecules accounting for both Franck±Condon and Herzberg±Teller couplings. A linear coupling scheme ...

We propose a new mechanism for paramagnetically catalyzed ortho-para conversion in molecular hydrogen. In this mechanism, a 3z excited-state character of H2 is mixed into the ground state of a collisional complex, inducing ...

Dioxygen reduction in the oxidative half-reaction of copper amine oxidases (CAOs) has been studied quantum chemically using the hybrid density functional theory (B3LYP). The reductive activation of dioxygen is a spin-forbidden ...

The present condition of Southern Kazakhstan natural reservoirs is represented in the article. The research was held in summer time of 2010. Quantitative and qualitative features and dominating types of zooplankton of the ...

Applying ab initio method the structures and UV-vis spectra of silicon hexacoordinated compound [Si(phen)2(OMe)2]I2 and it’s nitrate [Si(phen)2(OMe)2](NO3)2 were calculated. On the ground of comparison of theoretical and ...

The process of the complex formation by the natural flavonoid pinostrobin (5-hydroxy-7-methoxyflavonone) oxime with the Cu(II) and Fe(III) ions in a water–ethanol medium was investigated. The metal : ligand ratio in the ...

The process of the complex formation by the natural flavonoid pinostrobin (5-hydroxy-7- methoxyflavonone) oxime with the Cu(II) and Fe(III) ions in a water–ethanol medium was investigated. The metal : ligand ratio in the ...

The sesquiterpene lactone, stizolicin is known component of Stizolophus balsamita (Lam.) Cass. ex Takht. Its oxidation by CrO3/Py leads to easily isolable new crystalline derivative. The composition of derivative corresponds ...