New Open Access papers are published:
Experiments on the synthesis of isotopes of element 114 in the 242Pu + 48Ca reaction were carried out at a new gas-filled separator DGFRS-2 online to the DC-280 cyclotron of the Superheavy Element Factory at the Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research. The decay properties of 286Fl and 287Fl, as well as their α-decay products, were refined. The possibility of the existence of isomeric states in successive α-decays of 287Fl is discussed. The maximum cross section of 10.4(−2.1+3.5) pb was measured for the 242Pu(48Ca, 3n)287Fl reaction.
The authors propose a way of identifying the composition of paints by means of surface enhanced Raman spectroscopy using signal-amplifying substrates with arrays of vertically standing silver nanowires. A model tempera paint based on egg white with inorganic pigments (red lead, massicot, and emerald green) is used to show that with a reduced concentration of pigment, substrates can greatly improve sensitivity when detecting pigments in lower concentrations up to 0.01 g, compared to signals from the Raman scattering of light on foil. Reinforcing substrates allows the sensitivity of the technique to be improved in order to accurately identify components used individually and in mixtures.
The gigahertz longitudinal elastic modulus of hydrated gelatin films as a function of water content was studied using Brillouin spectroscopy. It was found that the elastic modulus increases with increasing protein concentration. Two ranges can be distinguished with different concentration behavior, which are associated with different proportions of bonded water molecules. The addition of glutaraldehyde has very little effect on the elastic modulus of hydrated gelatin films.
Yu. N. Kulchin, S. O. Kozhanov, A. S. Kholin, E. P. Subbotin, K. V. Kovalevsky, N. I. Subbotina & A. S. Gomolsky, The Linearly Polarized Light Effect on Maize Development // Bulletin of the Russian Academy of Sciences: Physics (2023). (Online First article)
The main purpose of the work was to study the linearly polarized light impact on the maize plants development. The other purpose was to confirm the model proposed earlier. The methods used in this work include the development of LED light sources, the polarization parameter (degree of polarization) assessment and statistical analysis. Maize (Zea mays L.) plants, Hansatech FMS 1+ pulsed fluorimeter and software TXP Series Instrumentation were used. The morphometric parameters measured on the 21st day demonstrated that maize plants of different varieties grown under linearly polarized light developed better than under non-polarized light conditions. In addition, the fact was confirmed by chlorophyll fluorescence measurements. The mechanism has been proposed to explain significant polarized radiation impact on maize, according to which this impact depends on the shape and arrangement of the leaf epidermal cells. The monocotyledonous maize plants have leaves with an ordered arrangement of epidermal cells in comparison with dicotyledonous plants, which cells placed in chaotic order and have no certain shape. Thus, the maize cells layer can transform linearly polarized radiation into elliptically polarized radiation, thus latter should be more efficiently absorbed by the chiral chromophores of photosensitive structures in underlying photosynthetic cells.
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