Results 111 to 120 of about 95,013 (144)

Potential energy surface of triplet O4

The Journal of Chemical Physics, 2018
We present a global ground-state potential energy surface (PES) for the triplet spin state of O4 that is suitable for treating high-energy vibrational–rotational energy transfer and collision-induced dissociation in electronically adiabatic spin-conserving O2–O2 collisions.
Yuliya Paukku, Zoltan Varga, Donald G. Truhlar   +2 more
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O4-methyl-, O4-ethyl-, and O4-isopropylthymidine 5'-triphosphates as analogs of thymidine 5'-triphosphate: kinetics of incorporation by Escherichia coli DNA polymerase I

Biochemistry, 1986
O4-Methyl-, O4-ethyl-, and O4-isopropylthymidine 5'-triphosphates, which can be formed by N-nitroso carcinogens, were tested for their ability to substitute for thymidine 5'-triphosphate (dTTP) in synthesis catalyzed by Escherichia coli DNA polymerase I (Pol I) by using activated DNA or synthetic polymers as templates. All could substitute for dTTP for
B, Singer, F, Chavez, S J, Spengler
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Structure, properties, and photodissociation of O4−

The Journal of Chemical Physics, 2001
We present the results of an ab initio quantum-chemical investigation of the structure of the anion O4− and potential energy surfaces for several electronic states. In addition to ground-state vibrational frequencies, which are in good agreement with other calculations and with matrix isolation experiments, we have investigated both photodissociation ...
Adelia J. A. Aquino, Peter R. Taylor, Stephen P. Walch   +2 more
openaire   +1 more source

Specific heat of low doped magnetite, Fe3−Ti O4 and Fe3−Zn O4

Journal of Magnetism and Magnetic Materials, 1995
Abstract Systematic studies of specific heat and entropy of the Verwey transition in Fe3−xTixO4 and Fe3−yZnyO4 series are reported. The results of these investigations demonstrate that in Fe3−xTixO4 and Fe3−yZnyO4 systems exists only one, well defined phase transition.
A. Kozłowski, Z. Kąkol, R. Zalecki, J.M. Honig   +3 more
openaire   +1 more source

Unraveling the mysteries of metastable O4*

The Journal of Chemical Physics, 1999
A recent report from our laboratory described 1+1 resonant photoionization spectra of an energetic, metastable O4 species produced in a dc discharge [Bevsek et al., Faraday Discuss. 108, 131 (1998)]. Although a definitive assignment of the spectra was lacking, the long-predicted covalent forms of O4, either cyclic (D2d) or “pinwheel” (D3h), were ...
Darcy S. Peterka, Musahid Ahmed, Arthur G. Suits, Kenneth J. Wilson, Anatoli Korkin, Marcel Nooijen, Rodney J. Bartlett   +6 more
openaire   +1 more source

Theoretical study of the O4 molecule

Journal of Molecular Structure: THEOCHEM, 1995
Abstract MCSCF molecular orbital calculations show that the D2h structure of the O4 molecule is more stable than the D4th structure. The O 4 (D 2h , 1 A 1 ) → 2O 2 ( 3 Σ g − ) dissociation energy is in agreement with the dissociation energy predicted by Lewis.
A.C. Pavão, G.M. Seabra, C.A. Taft
openaire   +1 more source

Direct detection and spectroscopy of O4*

Faraday Discussions, 1997
We have produced and directly detected a metastable state of tetraoxygen in a molecular beam, both by means of a dc discharge and by photodissociation of ozone in the collision region. The O4* produces a complex spectrum from which general conclusions may be made about its energetics and structure.
Holly M. Bevsek, Musahid Ahmed, Darcy S. Peterka, F. Cortney Sailes, Arthur G. Suits   +4 more
openaire   +1 more source

Two proliferative stages of the oligodendrocyte lineage (A2B5+O4- and O4+GaIC-) under different mitogenic control

Neuron, 1990
Cell proliferation during successive stages of oligodendrocyte development was delineated in the rat brain and optic nerve. Surface antigens, A2B5, O4, and galactocerebroside (GalC) identified three cell populations emerging in sequence; the incorporation of bromodeoxyuridine into newly synthesized DNA identified the proliferative cells.
A L, Gard, S E, Pfeiffer
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Proton positions in spinel H0.9Li0.1[Li0.33Ti1.67]O4, an ion-exchanged spinel Li1[Li0.33Ti1.67]O4

Physica B: Condensed Matter, 2004
Abstract Spinel Li1[Li0.33Ti1.67]O4 is an attractive candidate for the use as anode material in Li-ion batteries. This work focusses on the structural changes of spinel Li1[Li0.33Ti1.67]O4 upon the exchange of Li-ions with protons leading to the composition H0.9Li0.1[Li0.33Ti1.67]O4.
M Wagemaker, D.R Simon, E.M Kelder, J Schoonman, F.M Mulder   +4 more
openaire   +1 more source

?????????????????????? ???????????????????? ?????????????????? ?? ?????????????????????? ?????????????????????????? ?????????????? ?????????????? NiAlxFe2?????O4

2015
?? ?????????????????????????? ???????????????????? ??????????????????? ???? ???????????? ?????????????????????? ?????????????????????? ?????????? ?????????????? ?????????????? NiAlxFe2?????O4. ???????????????? ???????????????? ?????????????????????? ?????????? ??????????????. ??????????????????????, ???? ?????? x = 1,3 ???????????? ?????????????????????
openaire   +1 more source