Determination Of Magnetic Moment Research Articles

Anticancer, Antioxidant and Antimicrobial Evaluation of Cr (III) and Rh(III) Complexes Derived from A New Mannich Base

The Mannich base ligand was synthesized in an ethanol medium through a condensation reaction of 2-mercaptobenzimidazole and ciprofloxacin at room temperature. Subsequently, several metal complexes of this ligand were prepared. To characterize both the base ligand and the metal complexes, various techniques were employed, including elemental analysis, FT-IR spectroscopy, UV-Vis spectroscopy, molar conductivity measurements, magnetic moment determination, and melting point analysis. The results were shown that the metal complexes formed have the formula [Cr(L)2Cl2] Cl.H2O and [Rh(L)2(H2O)2] Cl3.H2O, where L= mannich base ligand. Based on spectroscopic analytical, coordination with metal ions involves the 'N' donor atom of mannich base and 'N' atom of piprizaing ring, and two complexes are A six-coordinated octahedral structure is suggested. Molar conductivity of these complexes showed that they were electrolytic in nature. In this study, the anticancer and antioxidant potential of the Mannich base ligand and its metal complexes were investigated against MDA-MB-231 cell lines and using the DPPH free radical scavenging assay. Moreover, the in vitro efficacy of the ligand and its complexes against Gram-negative bacteria (E. coli) and Gram-positive bacteria (Staphylococcus aureus), as well as the fungal strain Candida albicans, was evaluated using the disc diffusion method. The results indicated that Cr (III) and Rh(III) complexes demonstrated the highest levels of cytotoxicity against MDA-MB-231 cell lines, enhances antioxidant and antimicrobial activity more than the free ligand. These findings suggest that these metal complexes may have promising applications in the development of novel anticancer, antioxidant and antimicrobial agents.

Green synthesis and biological significance of chromone derivatives with amino acid and their metal complexes as antimicrobial, anti-diabetic and anti-oxidant

A new organic compound designed by reaction of 3-formyl-6-methylchromone with alanine amino acid and its metal chelates of Ni(II), Fe(II), Co(II), Zn(II) and Zr(IV) ions were synthesized by employing two approaches i.e. green method (microwave irradiation)and conventional method that further compared with each other. All compounds were characterized with various physical analysi (melting point determination, elemental analysis, molar conductance measurement, magnetic moment determination), chemical analysis and various spectral techniques i.e., UV–Vis, FTIR, 1H NMR, Mass spectra and evaluated for in vitro antimicrobial (antifungal: C. albicans, T. reesei; antibacterial: B. subtilis, S. aureus, E. coli), anti-diabetic and anti-oxidant activities. Synthesized compounds were investigated for their thermal stability and crystallinity through thermogravimetric analysis and powder-XRD technique. All analytical data suggested that the 3d series transition metal complexes have tetrahedral geometry and Zr(IV) complex has octahedral geometry. Fe(II) complex exhibited good to moderate both antibacterial and antifungal activity against all selected pathogens. Other metal complexes has shown almost similar antimicrobial potential as ligand. Among all synthesized compounds Ni(II) complex displayed highest anti-diabetic (IC50 = 61.71 mg/L) and anti-oxidant activity (IC50 = 592.38 mg/L). Other metal chelates are less effective for anti-diabetic and anti-oxidant activity compared to ligand.

DNA interaction, biological, and structural identification studies of bivalent nano‐sized Nickel, Palladium, and Platinum chelates of 2‐(((Z)‐6‐chloro‐3‐((E)‐([2‐hydroxyphenyl]imino)methyl)‐4H‐chromen‐4‐ylidene)amino)phenol Schiff base ligand

New nano‐sized Ni(II), Pd(II), and Pt(II) Schiff base chelates of 2‐(((Z)‐6‐chloro‐3‐((E)‐([2‐hydroxyphenyl]imino)methyl)‐4H‐chromen‐4‐ylidene)amino)phenol were designed and manufactured. The structural characterization of these isolated compounds was accomplished through spectral measurements, thermal and elemental analyses, and magnetic moment and conductivity determinations. The nano‐sized metal(II) complexes molar conductance indicated that they exhibited non‐electrolytic behavior. The UV–Vis spectral data and magnetic moment provided evidence for producing octahedral geometries in the nano‐sized complexes of Ni(II), Pd(II), and Pt(II). Metal chelates' thermal characteristics and decomposition kinetics were examined through Coats‐Redfern technique. The kinetic aspects, including pre‐exponential factor (A), the entropy of activation (ΔS), and activation energy (E) were enumerated. The X‐ray diffraction (XRD) calculations results of the trivalent metal complexes showed that sharp and intense diffraction peaks signify their crystalline properties with nanoscale particle size, and another proof was obtained from the images of SEM, TEM, EDX, and AFM also homogeneous distribution over the complex surface was confirmed. Molecular modeling techniques were adopted to optimize the metal complexes geometry. The viscosity and UV–Vis absorption determinations were utilized to assess the calf thymus DNA (CT‐DNA) interaction with the nano‐sized metal(II) chelates. The acquired data revealed that the complexes exhibit a non‐intercalative or incomplete binding pattern when interacting with DNA. The calculated DNA‐complexes binding constants are 3.93 ± 0.02 × 10,4 1.67 ± 0.3 × 105 and 2.88 ± 0.03 × 105 M−1, for nano‐sized Ni(II), Pd(II) and Pt(II) Schiff base chelates, successively. Both Gram‐negative (Escherichia coli and Pseudomonas aeruginosa) and Gram‐positive (Bacillus subtilis and Streptococcus pneumoniae) micro‐organisms were tested against H2L Schiff base ligand and its nano‐sized metal(II) complexes. Candida albicans and Aspergillus fumigatus were tested for antifungal activity, revealing that most complexes had activity lower than H2L ligand, while the complex of Ni(II) exhibited no discernible antifungal activities. Furthermore, the manufactured complexes underwent testing for their in‐vitro anticancer and antibacterial effectiveness. Furthermore, the complexes antioxidant activity was appraised through DPPH and ABTS inhibition tests, revealing distinct scavenging abilities on DPPH radicals. The complexes were ordered according to their scavenging capacity as follows: Ni(II) complex > Pd(II) complex > Pt(II) complex. Finally, the study of cell cycle arrest by the Ni(II), Pd(II), and Pt(II) complexes on HEPG2 has also been performed through flow cell cytometry.

Correction to: Analytical Determination of Mass and Magnetic Moment of Baryons in Diquark Model

Correction to: Analytical Determination of Mass and Magnetic Moment of Baryons in Diquark Model

Accurate determination of 6,7Li nuclear magnetic moments

We report an accurate determination of the nuclear magnetic dipole moments of 6,7Li from the measured ratio of the nuclear and the electron g-factors in atomic Li. The obtained results significantly improve upon the literature values and stress the importance of reliable theoretical calculations of the nuclear shielding corrections.

Analytical Determination of Mass and Magnetic Moment of Baryons in Diquark Model

Analytical Determination of Mass and Magnetic Moment of Baryons in Diquark Model

Nuclear Dipole Moments and Shielding Constants of Light Nuclei Measured in Magnetic Fields

Nuclear magnetic resonance (NMR) is a branch of spectroscopy commonly used for identifying the chemical structure of various materials. One of the areas in which NMR provides accurate data is the determination of nuclear magnetic moments. This work reviews NMR experiments with the nuclei of light elements in simple molecules. Since nuclear shielding constants from up-to-date quantum calculations are now available, very accurate dipole moments of many nuclei can be determined. Recent experimental measurements of 1H, 2H, 3H, 3He, 6Li, 7Li, 9Be, 10B, and 11B nuclear magnetic moments and the appropriate theoretical predictions are presented and commented upon. Several achievements in this field using different methodologies, such as NMR spectroscopy, molecular beam experiments, and the Penning trap method are reported.

Unraveling the Magnetic Signal of Individual Grains in a Hawaiian Lava Using Micromagnetic Tomography

AbstractMicromagnetic Tomography (MMT) is a new technique that allows the determination of magnetic moments of individual grains in volcanic rocks. Current MMT studies either showed that it is possible to obtain magnetic moments of relatively small numbers of grains in ideal sample material or provided important theoretical advances in MMT inversion theory and/or its statistical framework. Here, we present a large‐scale application of MMT on a sample from the 1907‐flow from Hawaii's Kilauea volcano producing magnetic moments of 1,646 grains. We produced 261,305 magnetic moments in total for these 1,646 grains, an increase of three orders of magnitude compared to earlier studies to assess the robustness of the MMT results, and a major step toward the number of grains that is necessary for paleomagnetic applications of MMT. Furthermore, we show that the recently proposed signal strength ratio is a powerful tool to scrutinize and select MMT results. Despite this progress, still only relatively large iron‐oxide grains with diameters >1.5–2 μm can be reliably resolved, impeding a reliable paleomagnetic interpretation. To determine the magnetic moments of smaller (<1 μm) grains that may exhibit pseudo‐single domain behavior and are therefore better paleomagnetic recorders, the resolution of the microcomputed tomography and magnetic scans necessary for MMT must be improved. Therefore, it is necessary to reduce the sample size in future MMT studies. Nevertheless, our study is an important step toward making MMT a useful paleomagnetic and rock‐magnetic technique.

Electronic Structure and Magnetic Properties of a High-Spin MnIII Complex: [Mn(mesacac)3 ] (mesacac=1,3-Bis(2,4,6-trimethylphenyl)-propane-1,3-dionato).

Metal acetylacetonates of the general formula [M(acac)3 ] (MIII =Cr, Mn, Fe, Co) are among the best investigated coordination compounds. Many of these first-row transition metal complexes are known to have unique electronic properties. Independently, photophysical research with different β-diketonate ligands pointed towards the possibility of a special effect of the 2,4,6-trimethylphenyl substituted acetylacetonate (mesacac) on the electron distribution between ligand and metal (MLCT). We therefore synthesized and fully characterized the previously unknown octahedral title complex. Its solid-state structure shows a Jahn-Teller elongation with two Mn-O bonds of 2.12/2.15 Å and four Mn-O bonds of 1.93 Å. Thermogravimetric data show a thermal stability up to 270 °C. High-resolution mass spectroscopy helped to identify the decomposition pathways. The electronic state and spin configuration of manganese were characterized with a focus on its magnetic properties by measurement of the magnetic susceptibility and triple-zeta density functional theory (DFT) calculations. The high-spin state of manganese was confirmed by the determination of an effective magnetic moment of 4.85 μB for the manganese center.

Synthesis and characterization of the new ligand, 1,2,4-triazino[5,6-b]indol-3-ylimino methyl naphthalene-2-ol and its Ni(II) and Cu(II) complexes: comparative studies of their in vitro DNA and HSA Binding.

A new ligand 1,2,4-triazino[5,6-b]indol-3-ylimino methyl naphthalene-2-ol (HL) was derived from 5H-[1,2,4]triazino[5,6-b]indol-3-amine and 2-hydroxy-1-naphthaldehyde. The metal complexes of the type [Ni(L)(Bipy)]1/2SO4 (1), [Cu(L)(Bipy)(H2O)2]1/2SO4 (2), [Ni(L)(Phen)]1/2SO4 (3) and [Cu(L)(Phen)(H2O)2]1/2SO4 (4) were synthesized. The ligand (HL) and complexes 1-4 were thoroughly characterized by elemental analysis and spectroscopic methods (FT-IR, ToF-MS, 1H NMR, 13C NMR), molar conductance and magnetic moment determination. The Ni(II) complexes 1 and 3 adopt the square planar geometry and Cu(II) complexes 2 and 4 acquire distorted octahedral arrangement. In vitro DNA binding behavior of ligand (HL) and metal complexes 1-4 was explored by fluorescence spectral and ethidium bromide studies. The outcomes reveal that the complexes interact with DNA via non-covalent groove binding and electrostatic interactions. The higher binding constant (K) values of 4.35 × 104 and 9.12 × 104M-1 for complexes 2 and 4 indicate stronger binding ability with DNA. Moreover, in vitro human serum albumin (HSA) binding experiment with HL and complexes 1-4 reveals conformational modulations in the Trp-214 microenvironments in the subdomain IIA pocket.

Magnetic moments of leptons, charged lepton flavor violations and dark matter phenomenology of a minimal radiative Dirac neutrino mass model

In a simple extension of the standard model (SM), a pair of vector like lepton doublets (L1 and L2) and a SU(2)L scalar doublet (η) have been introduced to help in accommodating the discrepancy in determination of the anomalous magnetic moments of the light leptons, namely, e and μ. Moreover, to make our scenario friendly to a Dirac like neutrino and also for a consistent dark matter phenomenology, we specifically add a singlet scalar (S) and a singlet fermion (ψ) in the set-up. However, the singlet states also induce a meaningful contribution in other charged lepton processes. A discrete symmetry {mathcal{Z}}_2times {mathcal{Z}}_2^{prime } has been imposed under which all the SM particles are even while the new particles may be assumed to have odd charges. In a bottom-up approach, with a minimal particle content, we systematically explore the available parameter space in terms of couplings and masses of the new particles. Here a number of observables associated with the SM leptons have been considered, e.g., masses and mixings of neutrinos, (g − 2) anomalies of e, μ, charged lepton flavor violating (cLFV) observables and the dark matter (DM) phenomenology of a singlet-doublet dark matter. Neutrinos, promoted as the Dirac type states, acquire mass at one loop level after the discrete {mathcal{Z}}_2^{prime } symmetry gets softly broken, while the unbroken {mathcal{Z}}_2 keeps the dark matter stable. The mixing between the singlet ψ and the doublet vector lepton can be constrained to satisfy the electroweak precision observables and the spin independent (SI) direct detection (DD) cross section of the dark matter. In this analysis, potentially important LHC bounds have also been discussed.

Nuclear magnetic shielding in HD and HT

We perform a calculation of the nuclear magnetic shielding in HD and HT molecules, with complete and perturbative accounts for nuclear masses. From the difference in shielding, we obtain the deuteron and triton magnetic moments in agreement with the CODATA value, with the accuracy limited only by nuclear magnetic resonance measurements. Most importantly, our calculations indicate a potential for improved determination of nuclear magnetic moments.

Исследование ЯМР-сигналов рубидия в водных растворах и определение магнитных моментов ядер Rb-85 и Rb-87

Study of NMR signals of rubidium in aqueous solutions and determination of the magnetic moments of Rb-85 and Rb-87 nuclei Yuriy Ilyich Neronov, Anton Nikolaevich Pronin All-Russian Research Institute of Metrology named after V.I. D. I. Mendeleeva, St. Petersburg, Russia, yineronov@mail.ru, and a.n.pronin@vniim.ru Annotation. The problem of increasing the accuracy of determining the magnetic moments of rubidium-85 and rubidium-87 nuclei based on the study of NMR signals of RbNO3 and RbCl solutions in water is considered. The spectral linewidth of the NMR signals from the 85Rb and 87Rb nuclei is a hundred times greater than the similar width of the signals from the nuclei for other neighboring alkaline elements of the periodic table, and such a broadening limits the possibilities for precision registration of nuclear resonance frequencies. Simultaneous registration of nuclear magnetic resonance signals from water protons and from rubidium nuclei was used in the work, which makes it possible to minimize the spread of data for the resonance frequency ratio. The ratios of the resonance frequencies of water protons and 85Rb, 87Rb nuclei were determined for aqueous solutions of RbCl and RbNO3 with concentrations from 0.5 to 2.0 mol/kg H2O. As a result, the ratios of magnetic moments (87Rb)/(85Rb) = 2.0333981(2) were calculated with a relative uncertainty d ≈ 10-7. The data on the resonance frequency ratio f(1H)/f(87Rb) for the content of rubidium salts in water were extrapolated to zero concentrations and f(1H)/f(87Rb) = 3.0561795(2) was determined for rubidium ions surrounded by water molecules . As a result, the magnetic moments are determined (85Rb)=1.353067(37); (87Rb)=2.751324(74). The obtained results are compared with the data of previous works. Annotation. The problem of increasing the accuracy of determining the magnetic moments of rubidium-85 and rubidium-87 nuclei based on the study of NMR signals of RbNO3 and RbCl solutions in water is considered. The spectral linewidth of the NMR signals from the 85Rb and 87Rb nuclei is a hundred times greater than the similar width of the signals from the nuclei for other neighboring alkaline elements of the periodic table, and such a broadening limits the possibilities for precision registration of nuclear resonance frequencies. Simultaneous registration of nuclear magnetic resonance signals from water protons and from rubidium nuclei was used in the work, which makes it possible to minimize the spread of data for the resonance frequency ratio. The ratios of the resonance frequencies of water protons and 85Rb, 87Rb nuclei were determined for aqueous solutions of RbCl and RbNO3 with concentrations from 0.5 to 2.0 mol/kg H2O. As a result, the ratios of magnetic moments (87Rb)/(85Rb) = 2.0333981(2) were calculated with a relative uncertainty d ≈ 10-7. The data on the resonance frequency ratio f(1H)/f(87Rb) for the content of rubidium salts in water were extrapolated to zero concentrations and f(1H)/f(87Rb) = 3.0561795(2) was determined for rubidium ions surrounded by water molecules . As a result, the magnetic moments are determined (85Rb)=1.353067(37); (87Rb)=2.751324(74). The obtained results are compared with the data of previous works. Keywords: precision determination of nuclear magnetic moments, simultaneous registration of NMR signals from two types of nuclei, quantum radiophysics

Study of NMR signals of rubidium in aqueous solutions and determination of the magnetic moments of Rb-85 and Rb-87 nuclei

The problem of increasing the accuracy of determining the magnetic moments of rubidium-85 and rubidium-87 nuclei based on the study of NMR signals of RbNO3 and RbCl solutions in water is considered. The spectral linewidth of the NMR signals from the 85Rb and 87Rb nuclei is a hundred times greater than the similar width of the signals from the nuclei for other neighboring alkaline elements of the periodic table, and such a broadening limits the possibilities for precision registration of nuclear resonance frequencies. Simultaneous registration of nuclear magnetic resonance signals from water protons and from rubidium nuclei was used in the work, which makes it possible to minimize the spread of data for the resonance frequency ratio. The ratios of the resonance frequencies of water protons and 85Rb, 87Rb nuclei were determined for aqueous solutions of RbCl and RbNO3 with concentrations from 0.5 to 2.0 mol/kg H2O. As a result, the ratios of magnetic moments μ(87Rb)/μ(85Rb)=2.0333981(2) were calculated with a relative uncertainty delta~10-7. The data on the resonance frequency ratio f(^1H)/f(87Rb) for the content of rubidium salts in water were extrapolated to zero concentrations and f(^1H)/f(87Rb)=3.0561795(2) was determined for rubidium ions surrounded by water molecules. As a result, the magnetic moments are determined μ(85Rb)=1.353067(37), μ(87Rb)=2.751324(74). The obtained results are compared with the data of previous works. Keywords: precision determination of nuclear magnetic moments, simultaneous registration of NMR signals from two types of nuclei, quantum radiophysics. Keywords: precision assessment of nuclear magnetic moments, rubidium-87 in solution and spin-spin interaction, simultaneous registration of signals from two types of nuclei, quantum radiophysics.

QED Effect on the Nuclear Magnetic Shielding of ^{3}He.

The leading quantum electrodynamic corrections to the nuclear magnetic shielding in one- and two-electron atomic systems are obtained in a complete form, and the shielding constants of ^{1}H, ^{3}He^{+}, and ^{3}He are calculated to be 17.735 436(3)×10^{-6}, 35.507 434(9)×10^{-6}, and 59.967 029(23)×10^{-6}, respectively. These results are orders of magnitude more accurate than previous ones, and, with the ongoing measurement of the nuclear magnetic moment of ^{3}He^{+} and planned ^{3}He^{2+}, they open the window for high-precision absolute magnetometry using ^{3}He NMR probes. The presented theoretical approach is applicable to all other light atomic and molecular systems, which facilitates the improved determination of magnetic moments of any light nuclei.

Accurate measurement of atomic magnetic moments by minimizing the tip magnetic field in STM-based electron paramagnetic resonance

Electron paramagnetic resonance (EPR) performed with a scanning tunneling microscope (STM) allows for probing the spin excitation of single atomic species with MHz energy resolution. One of the basic applications of conventional EPR is the precise determination of magnetic moments. However, in an STM, the local magnetic fields of the spin-polarized tip can introduce systematic errors in the measurement of the magnetic moments by EPR. We propose to solve this issue by finding tip-sample distances at which the EPR resonance shift caused by the magnetic field of the tip is minimized. To this end, we measure the dependence of the resonance field on the tip-sample distance at different radiofrequencies and identify specific distances for which the true magnetic moment is found. Additionally, we show that the tip's influence can be averaged out by using magnetically bistable tips, which provides a complementary method to accurately measure the magnetic moment of surface atoms using EPR STM.

Spectral studies and quantum chemical ab initio calculations for Copper(II) complexes of two heterocyclic aroylhydrazones

In the present study, five copper(II) complexes of quinoline-2-carbaldehyde benzoylhydrazone and a copper(II) complex of 2-benzoylpyridine benzoylhydrazone were synthesized. From the elemental analyses, conductivity measurements and by the determination of magnetic moments, the complexes were formulated. The complexes were characterized by IR, electronic and EPR spectroscopy. From the trend in g values, considerable covalent character is expected to the metal-ligand bonds and also, square pyramidal geometry is suggested for five coordinated complexes. Half field signals observed in the EPR spectra of [Cu(QCB)N3]2·H2O and [Cu2(BPB)2(μ-SO4)], in solid state at 298 K and in frozen solution, confirm the dimeric structure for the complexes. The quantum chemical results obtained from the ab initio calculations for the aroylhydrazones and their Cu(II)- complexes were evaluated to explain the observed reactivity tendency of the compounds.

Muon and electron g−2 and proton and cesium weak charges implications on dark Zd models

Theories beyond the standard model involving a sub-GeV-scale vector ${Z}_{d}$ mediator have been largely studied as a possible explanation of the experimental values of the muon and electron anomalous magnetic moments. Motivated by the recent determination of the anomalous muon magnetic moment performed at Fermilab, we derive the constraints on such a model obtained from the magnetic moment determinations and the measurements of the proton and cesium weak charge, ${Q}_{W}$, performed at low-energy transfer. In order to do so, we revisit the determination of the cesium ${Q}_{W}$ from the atomic parity violation experiment, which depends critically on the value of the average neutron rms radius of $^{133}\mathrm{Cs}$, by determining the latter from a practically model-independent extrapolation from the recent average neutron rms radius of $^{208}\mathrm{Pb}$ performed by the PREX-2 Collaboration. From a combined fit of all the aforementioned experimental results, we obtain rather precise limits on the mass and the kinetic mixing parameter of the ${Z}_{d}$ boson, namely ${m}_{{Z}_{d}}={47}_{\ensuremath{-}16}^{+61}\text{ }\text{ }\mathrm{MeV}$ and $ϵ={2.3}_{\ensuremath{-}0.4}^{+1.1}\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$, when marginalizing over the $Z\ensuremath{-}{Z}_{d}$ mass mixing parameter $\ensuremath{\delta}$.

Synthesis, characterization and antibacterial study of Co(II) and Cu(II) complexes of mixed ligands of piperaquine and diclofenac

Pathogenic microorganisms develop incessant resistance toward antibiotics through various cellular defense mechanisms, thereby creating a search for chemotherapeutic alternatives, the potentials of which metal complexes of small-molecule drugs offer. In this study, Cu(II) and Co(II) complexes of mixed piperaquine and diclofenac were synthesized and characterized via magnetic moment determination, elemental analysis, FTIR, UV-Visible, 1D 1H NMR, 13C NMR spectroscopy and powder XRD, then evaluated for biological activities in silico and in vitro. The results provide evidence of coordination of the metal ions to ligands through N, COO and Cl groups with proposed octahedral geometry, low spin, paramagnetic, polycrystalline complexes. The physicochemical and pharmacokinetic parameters predicted in silico support bio-functionality and safety of the complexes. The complexes demonstrate strong inhibition against bacterial strains especially Staphylococcus aureus in vitro. Specifically, Cu(II) complex at 1% w/w inhibited a zone of 100 mm which is in multi-folds of the effects of piperaquine and diclofenac with 32 and 25 mm respectively, and better than ciprofloxacin with 92 mm. On DPPH assay, both complexes display better antioxidant potentials with respective IC50 of 165.09 and 382.7 µg/mL compared to ascorbic acid with 7526 µg/mL. Thus, the complexes represent therapeutic models for overcoming antibacterial resistance upon further study.

Quantum electrodynamics with self-conjugated equations with spinor wave functions for fermion fields

Quantum electrodynamics (QED) with self-conjugated equations with spinor wave functions for fermion fields is considered. In the low order of the perturbation theory, matrix elements of some of QED physical processes are calculated. The final results coincide with cross-sections calculated in the standard QED. The self-energy of an electron and amplitudes of processes associated with determination of the anomalous magnetic moment of an electron and Lamb shift are calculated. These results agree with the results in the standard QED. Distinctive feature of the developed theory is the fact that only states with positive energies are present in the intermediate virtual states in the calculations of the electron self-energy, anomalous magnetic moment of an electron and Lamb shift. Besides, in equations, masses of particles and antiparticles have the opposite signs.