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51.
52.
Yu.Ts. Oganessian V.K. Utyonkov Yu.V. Lobanov F.Sh. Abdullin A.N. Polyakov I.V. Shirokovsky Yu.S. Tsyganov G.G. Gulbekian S.L. Bogomolov B.N. Gikal A.N. Mezentsev S. Iliev V.G. Subbotin A.M. Sukhov O.V. Ivanov G.V. Buklanov K. Subotic A.A. Voinov M.G. Itkis K.J. Moody J.F. Wild N.J. Stoyer M.A. Stoyer R.W. Lougheed C.A. Laue 《The European Physical Journal A - Hadrons and Nuclei》2002,15(1-2):201-204
This paper presents results of the experiments aimed at producing long-lived superheavy elements located near the spherical-shell
closures with Z ⩾ 114 and N ⩾ 172 in the 244Pu + 48Ca and 248Cm + 48Ca reactions. The large measured α-particle energies of the newly observed nuclei, together with the long decay times and
spontaneous fission terminating the chains, offer evidence of the decay of nuclei with high atomic numbers. The decay properties
of the synthesized nuclei are consistent with the consecutive α-decays originating from the parent nuclides 288, 289114 and 292116, produced in the 3n and 4n evaporation channels with cross-sections of about a picobarn. The present observations can be considered as experimental
evidence of the existence of the “island of stability” of superheavy elements.
Received: 21 March 2002 / Accepted: 16 May 2002 / Published online: 31 October 2002
RID="a"
ID="a"e-mail: utyonkov@sungns.jinr.ru 相似文献
53.
Alcalde E Ayala C Dinarès I Mesquida N Sánchez-Ferrando F 《The Journal of organic chemistry》2001,66(7):2281-2290
A convergent "5 + 1" and "5 + 3" synthetic strategy allowed the synthesis of the first examples of bis-betaines 2 and 3, a prototype of phanes that incorporate heterocyclic betaines. The structure of the quadrupolar macrocyclic systems 2 and 3 together with the dicationic [1(6)]- and [1(8)] meta-heterophane precursors 5*2X and 6*2X were examined by spectroscopy using 1H and 13C NMR techniques together with 1H-DNMR studies and electrospray ionization mass spectrometry. 相似文献
54.
Mark Kerzhner Dinar Abdullin Jennifer Więcek Dr. Hideto Matsuoka Dr. Gregor Hagelueken Prof. Dr. Olav Schiemann Prof. Dr. Michael Famulok 《Chemistry (Weinheim an der Bergstrasse, Germany)》2016,22(34):12113-12121
Site‐directed spin labeling of RNA based on click chemistry is used in combination with pulsed electron‐electron double resonance (PELDOR) to benchmark a nitroxide spin label, called here d? . We compare this approach with another established method that employs the rigid spin label Çm for RNA labeling. By using CD spectroscopy, thermal denaturation measurements, CW‐EPR as well as PELDOR we analyzed and compared the influence of d? and Çm on a self‐complementary RNA duplex. Our results demonstrate that the conformational diversity of d? is significantly reduced near the freezing temperature of a phosphate buffer, resulting in strongly orientation‐selective PELDOR time traces of the d? ‐labeled RNA duplex. 相似文献
55.
Darya A. Kuznetsova Dinar R. Gabdrakhmanov Denis M. Kuznetsov Svetlana S. Lukashenko Valery M. Zakharov Anastasiia S. Sapunova Syumbelya K. Amerhanova Anna P. Lyubina Alexandra D. Voloshina Diana V. Salakhieva Lucia Ya. Zakharova 《Molecules (Basel, Switzerland)》2021,26(8)
The solution behavior and physicochemical characteristics of polymer–colloid complexes based on cationic imidazolium amphiphile with a dodecyl tail (IA-12) and polyacrylic acid (PAA) or DNA decamer (oligonucleotide) were evaluated using tensiometry, conductometry, dynamic and electrophoretic light scattering and fluorescent spectroscopy and microscopy. It has been established that PAA addition to the surfactant system resulted in a ca. 200-fold decrease in the aggregation threshold of IA-12, with the hydrodynamic diameter of complexes ranging within 100–150 nm. Electrostatic forces are assumed to be the main driving force in the formation of IA-12/PAA complexes. Factors influencing the efficacy of the complexation of IA-12 with oligonucleotide were determined. The nonconventional mode of binding with the involvement of hydrophobic interactions and the intercalation mechanism is probably responsible for the IA-12/oligonucleotide complexation, and a minor contribution of electrostatic forces occurred. The latter was supported by zeta potential measurements and the gel electrophoresis technique, which demonstrated the low degree of charge neutralization of the complexes. Importantly, cellular uptake of the IA-12/oligonucleotide complex was confirmed by fluorescence microscopy and flow cytometry data on the example of M-HeLa cells. While single IA-12 samples exhibit roughly similar cytotoxicity, IA-12–oligonucleotide complexes show a selective effect toward M-HeLa cells (IC50 1.1 µM) compared to Chang liver cells (IC50 23.1 µM). 相似文献
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57.
Reaction of Methyl (2-Methylidene)-3-oxolup-20(29)-en-28-oate with Dimethyl Trimethylsilyl Phosphite
Tsepaeva O. V. Nemtarev A. V. Abdullin T. I. Kuznetsova E. V. Mironov V. F. 《Russian Journal of General Chemistry》2018,88(9):1944-1947
Russian Journal of General Chemistry - A method of phosphorylation of pentacyclic triterpenoids derivatives containing an α,β-unsaturated carbonyl fragment in the ring A was described by... 相似文献
58.
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The interaction of the plasma formed at emission centers of an electron source using explosive electron emission with the cathode surface is studied. It is found that the plasma flux does not flow around obstacles located in its path and is effectively deionized upon incidence on the wall.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 11, pp. 26–29, November, 1981. 相似文献
60.
F. A. Nizamov P. N. Togulev D. R. Abdullin S. M. Khantimerov P. Balaya N. M. Suleimanov 《Physics of the Solid State》2016,58(3):475-480
Electron paramagnetic resonance (EPR) studies have been performed with the aim of determining the valence state and local crystal structure of the nearest environment of vanadium ions in the initial, charged, and discharged samples of the cathode material NaxV2(PO4)3 (1 ≤ x ≤ 3). It has been found that the charged sample (x = 1) is characterized by an intense signal corresponding to V4+ ions located in a highly distorted octahedral crystal field. An EPR signal with the g-factor close to the g-factor of the V4+ ion has also been observed in the initial sample (x = 3), where the intensity of the resonance signal is one order of magnitude lower than that in the charged sample. It has been revealed that the resonance signal under consideration is associated with the formation of antisite defects when a part of vanadium ions are located in sites of sodium ions. It has also been found that the intensity of this signal increases after a complete charge–discharge cycle (x = 3). 相似文献