New for the Fauna of Ukraine Rotifers (Rotifera, Bdelloidea) of Adinetidae and Habrotrochidae Families

The whole list of rotifer species from class Bdelloidea found in Ukraine includes 84 species and subspecies of 10 genera and 3 families. Author have found 53 species and subspecies of Class Bdelloidea in poorly investigated biotopes of five Ukrainian reserves (Kanev natural reserve, ”Kam’yani mohyly”,”Roztoch’chya”,”Granitno-Stepove pobuzh’a”,Carpathian reserve). 23 of them proved new for the Ukrainian fauna. Redescriptions and drawings of nine bdelloid species of families Adinetidae and Habrotrochidae new for Ukraine are presented in the paper. These are Habrotrocha elegans (Milne), H. pavida Bryce, H. plana (?) Milne, Otostephanos cuspidilabris de Koning, O. donneri (?) Bartoš, O. monteti Milne, Adineta gracilis Janson, A. rhomboidea Berzins, A. steineri Bartoš.В настоящее время в фауне Украины насчитывают 84 вида и подвида коловраток (из 10 родов 3 семейств), относящихся к классу Bdelloidea. В мало- или недостаточно изученных в отношении Rotatoria местообитаниях (донные осадки, обрастания, наземные мхи, почва, поверхность тела водных членистоногих) пяти заповедных территорий Украины (Каневский природный и Карпатский заповедники, Каменные могилы, Расточье, Гранитностепное Побужье) автором найдены 53 вида и подвида бделлоидных коловраток, из которых 23 новые для фауны Украины. В данной статье приводятся краткие переописания и рисунки 9 видов из семейств Adinetidae, Habrotrochidae : Habrotrocha elegans (Milne), H. pavida Bryce, H. plana (?) Milne, Otostephanos cuspidilabris de Koning, O. donneri (?) Bartoš, O. monteti Milne, Adineta gracilis Janson, A. rhomboidea Berzins, A. steineri Bartoš

Chemical freeze-out of light nuclei in high energy nuclear collisions and resolution of the hyper-Triton chemical freeze-out puzzle

Indexación ScopusWe present a summary of the recent results obtained with the novel hadron resonance gas model with the multicomponent hard-core repulsion which is extended to describe the mixtures of hadrons and light (anti-, hyper-)nuclei. A very accurate description is obtained for the hadronic and the light nuclei data measured by STAR at the collision energy The most striking result discussed here is that for the most probable chemical freeze-out scenario for the STAR energy the found parameters allow us to reproduce the values of the experimental ratios S 3 and without fitting. © Published under licence by IOP Publishing Ltd.https://iopscience-iop-org.recursosbiblioteca.unab.cl/article/10.1088/1742-6596/1690/1/01212

Triple nuclear collisions – a new method to explore the matter properties under new extreme conditions

We suggest to explore an entirely new method to experimentally and theoretically study the phase diagram of strongly interacting matter based on the triple nuclear collisions (TNC).We simulated the TNC using the UrQMD 3.4 model at the beam center of- mass collision energies $\sqrt {{S_{NN}}} = 200\,{\rm{GeV}}\,{\rm{and}}\,\sqrt {{S_{NN}}} = 2.76\,{\rm{TeV}}$. It is found that in the most central and simultaneous TNC the initial baryonic charge density is about 3 times higher than the one achieved in the usual binary nuclear collisions at the same energies. As a consequence, the production of protons and Λ-hyperons is increased by a factor of 2 and 1.5, respectively. Using the MIT Bag model equation we study the evolution of the central cell in TNC and demonstrate that for the top RHIC energy of collision the baryonic chemical potential is 2-2.5 times larger than the one achieved in the binary nuclear collision at the same time of reaction. Based on these estimates, we show that TNC offers an entirely new possibility to study the QCD phase diagram at very high baryonic charge densities