First Study on Nihonium (Nh, Element 113) Chemistry at TASCA

Nihonium (Nh, element 113) and flerovium (Fl, element 114) are the first superheavy elements in which the 7p shell is occupied. High volatility and inertness were predicted for Fl due to the strong relativistic stabilization of the closed 7p1/2 sub-shell, which originates from a large spin-orbit splitting between the 7p1/2 and 7p3/2 orbitals. One unpaired electron in the outermost 7p1/2 sub-shell in Nh is expected to give rise to a higher chemical reactivity. Theoretical predictions of Nh reactivity are discussed, along with results of the first experimental attempts to study Nh chemistry in the gas phase. The experimental observations verify a higher chemical reactivity of Nh atoms compared to its neighbor Fl and call for the development of advanced setups. First tests of a newly developed detection device miniCOMPACT with highly reactive Fr isotopes assure that effective chemical studies of Nh are within reach.

ENDOMETRIOSIS AND OXIDATIVE-ANTIOXIDATIVE IMBALANCE STATUS. THE ROLE OF FLAVONOIDS, CURCUMIN AND N-ACETYLCYSTEINE

Endometriosis is a silent, unseen and painful female illness which is characterized by the presence of glands and stroma outside the uterine cavity. Approximately one in ten women in a reproductive age around the world suffer from endometriosis of whom nearly half is treated due to infertility. The pathogenesis and mechanisms that determines the occurence of the disease are still unknown. Immunological factors have been observed in the initiation and development of endometriosis. An imbalance between reactive oxygen species (molecules having an unpaired electron) and antioxidants leads to the upregulation of metalloproteinases, prostaglandins, cytokines and chemokines.

Antioxidant and Oxidative Stress

Antioxidants are compounds that eliminate oxidative stress in biological systems. Oxidative stress is caused by various radicals formed in the system as a result of oxygen entering the biological system. Structures with unpaired electron are either free radicals or radical ions. Antioxidants neutralize free radicals or radical ions due to the unpaired electron in their structure. The radical ions formed as a result of oxidation is removed from the system without damaging the biological system with the effect of antioxidants. There are many free radicals and radical ions. Among these radical groups are radical ions formed by oxygen which are important for biological systems. Antioxidants are responsible for the destruction of such radicals.

Molecular and supported Ti(iii)-alkyls: efficient ethylene polymerization driven by the π-character of metal–carbon bonds and back donation from a singly occupied molecular orbital

Ti(iii) alkyl species polymerize ethylene via an original mechanism, which involves back donation to the π*(C2H4) and a delocalization of the unpaired electron in the transition state of C2H4 insertion into the partially alkylidenic Ti(iii)–C bond.

Controlling the unpaired electron by electrostatic attraction in the solid state

One-electron reduction of 2,7-tBu2-pyrene-4,5,9,10-tetraone (1) with potassium afforded two monoradicals 1K(cryp) and 1K(18c6), a radical tetramer [1K(15c5)]4 and a radical polymer (1K)2n. From 1K(cryp) and 1K(18c6), we demonstrated large spin...

Simulation of nitrogen nuclear spin magnetization of liquid solved nitroxides

Nitroxide radicals are widely used in Electron Paramagnetic Resonance (EPR) applications. Nitroxides are stable organic radicals containing ${\rm N-O}^\bullet$ group with hyperfine coupled unpaired electron and nitrogen nuclear spins. In...

Valence Tautomeric Transformation in the [CrCo] Compound: Exploration of Cooperative Interactions

A crystal containing the heterometallic Cr-ligand-Co cluster with an unpaired electron on the ligand as a structural unit is examined. The developed model which describes the magnetic and polarizability characteristics...

New Complexes with Triazole Schiff Bases Derivative Ligand Containing Aspirin: Synthesis, Structure, Conductivity and Magnetic Susceptibility

Complexes of Cu(II) ), Ni (II) and Co (II) of a new triazole Schiff-base of two different ligand ,namely(E)-2-(4-((2-hydroxybenzylidene)amino)4H- 1,2,4-triazol-3-yl)phenyl acetate and (E)-2-(4-((2-hydroxy-4-methoxybenzylidene)amino)-4H-1,2,4-triazol-3-yl)phenyl acetate were prepared and characterized by elemental analysis, 1H, 13C-NMR, FTIR and UV-Visible spectroscopic data. The complex is found to be an ionic in nature by conductivity measurements and have been found to posses 1:2(M:2L) stoichiometry. The magnetic moment values of 1.540–1.7295.B.M. for Cu(II) complexes without doubt recommend octahedral geometry with one unpaired electron for Cu(II) complexes. The magnetic moment values of 3.863–4.039 B.M. for Co(II) complexes that recommend high spin octahedral geometry with three unpaired electron for Co(II) complexes. The magnetic moment value of 2.351B.M. for Ni(II) complex was matches to two unpaired electrons and octahedral geometry. Considerable variations in biological activity with structure and types are observed for these complexes.