Redox mechanism of ferrocene, acetylferrocene, ferrocenyl cinnamenyl ketone at a platinum electrode was studied with cyclic voltammetry (CV) and in-situ Fourier transform infrared (FTIR) spectroelectrochemistry. The ...Redox mechanism of ferrocene, acetylferrocene, ferrocenyl cinnamenyl ketone at a platinum electrode was studied with cyclic voltammetry (CV) and in-situ Fourier transform infrared (FTIR) spectroelectrochemistry. The IR bands in the range of 2000-1000 cm-1 attributed to the stretching and ring vibrations of these materials show the main spectral changes in the processes.展开更多
AIM:To investigate the relationship between the ironmetabolism-related gene expression profiles and efficacy of antiviral therapy in chronic hepatitis C patients.METHODS:The hepatic expression profile of ironmetabolis...AIM:To investigate the relationship between the ironmetabolism-related gene expression profiles and efficacy of antiviral therapy in chronic hepatitis C patients.METHODS:The hepatic expression profile of ironmetabolism-related genes was analyzed and its association with virological response to pegylated-interferon plus ribavirin combination therapy was evaluated.A hundred patients with chronic hepatitis C(genotype1b,n = 50; genotype 2,n = 50) were enrolled and retrospectively analyzed.Liver biopsy samples were subjected to quantitative polymerase chain reaction for iron-metabolismrelated genes and protein expression(Western blotting analysis) for ferroportin.As a control,normal liver tissue was obtained from 18 living donors of liver transplantation.Serum hepcidin level was measured by sensitive liquid chromatography/electrospray ionization tandem mass spectrometry.RESULTS:Iron overload is associated with liver damage by increasing oxidative stress and hepatitis C virus(HCV)is reported to induce iron accumulation in hepatocytes in vivo.Conversely,iron administration suppresses HCV replication in vitro.Therefore,the association between HCV infection and iron metabolism remains unclear.Compared with controls,patients had significantly higher gene expression for transferrin,iron-regulatoryproteins 1 and 2,divalent metal transporter 1,and ferroportin,but similar for transferrin receptors 1 and2,and hepcidin.When the expression profiles were compared between sustained virological response(SVR)and non-SVR patients,the former showed significantly lower transcription and protein expression of hepcidin and ferroportin.Expression of hepcidin-regulating genes,BMPR1,BMPR2,and hemojuvelin,was significantly increased,whereas BMP2 was decreased in HCV-infected liver.BMPR2 and hemojuvelin expression was significantly lower in the SVR than non-SVR group.HCV infection affects the expression of iron-metabolism-related genes,leading to iron accumulation in hepatocytes.CONCLUSION:Decreased expression of hepcidin and ferroportin in SVR patients indicates the importance of hepatocytic iron retention for viral response during pegylated-interferon plus ribavirin treatment.展开更多
The study by the author of magnetic scattering neutrons in the structures of ferrimagnets, as well as his experiments with the separation of magnetic charges in dipole pairs ±g in magnetic field, showed that fund...The study by the author of magnetic scattering neutrons in the structures of ferrimagnets, as well as his experiments with the separation of magnetic charges in dipole pairs ±g in magnetic field, showed that fundamental magnetic particles (magnetic charges) are real structural components of atoms and substance. It is the magnetic poles, and not the moving electric charges are the direct sources of all magnetic fields and magnetic manifestations in Nature. Basic reasons of ignoring the magnetic fundamental particles by world physical theory, for almost 150 years, are the ultra-harsh confinement of these particles in substance which radically is different from the confinement electrons, as well as the vicious concept of the electric magnetism Maxwell. Rotating magnetic dipoles in conductors which are untwisted by electric current, are direct sources of the vortex magnetic field rot<em><strong>H</strong></em>. One should also expect the formation of a vortex electric field rot<em><strong>E </strong></em>forming by rotating electric dipoles which are untwisted by the current of magnetic charges. This article provides an experimental answer to the question: what field is formed around a conductor if joint direct currents of electric<em> <strong style="white-space:normal;"><em>J</em></strong></em><sub>e</sub> and magnetic<strong><em> J</em></strong><sub>g</sub> charges are passed through it? The author’s experiments have shown that in this case the vortex electromagnetic current is realized which manifests itself as the vortex electromagnetic (gravitational) field. It is possible to implement such a process, according to the results of the author’s research, exclusively in superconductors. The vector character of the gravitational field is in many respects similar to the vortex magnetic field which makes it possible to introduce such it states as paragravitation and ferrogravitation into representations. To create joint currents of electric and magnetic charges, the author used the inertial forces of these particles under conditions of acceleration and deceleration of the rotational motion of the closed lead superconductor. The result of this experiment was the gravitational, as it turned out later, the ferrogravitational field, which was detected by effect repulsion of trial cargos from the coil with a superconducting winding at the stage of its untwist. The latter process is defined by the author as an effect of the gravitational (ferrogravitational) levitation. The values of ferrogravitational (levitational) forces noted in this experiment were: 120 mg for a tungsten trial cargo and 50 and 25 mg for a lead cargo with an error of ±15 mg. The values of ferrogravitational (levitational) forces noted in this experiment are: 120 mg for from tungsten trial cargo and 50 and 25 mg for a cargo from lead, with an error of ±15 mg. The “anomaly” noted by the author in this study was in the absence of any absence of a gravitational effect on stage a braking of the coil. Probable cause of the noted “anomaly” is discussed in the Discussion of Results chapter.展开更多
The ferro resonance caused by an electromagnetic potential transformer is a frequently occurring internal overvoltage in the power distribution network, and it threatens the safe operation of the network. Fast and acc...The ferro resonance caused by an electromagnetic potential transformer is a frequently occurring internal overvoltage in the power distribution network, and it threatens the safe operation of the network. Fast and accurate detection is the prerequisite for suppression and elimination of ferro resonance. Wavelet transform provides a powerful tool for analysis of nonstationary signals. This paper applies wavelet transform to detect ferro resonance. Analysis results show that it makes extraction of failure information accurate, and fast algorithm makes detection real time.展开更多
The experimental results of the redox of manganese and ferro ions by manganese bacteria are described. Under the aerobic conditions, the manganese bacteria can oxidate Mn2+ into Mn4+. In the course of the manganese ba...The experimental results of the redox of manganese and ferro ions by manganese bacteria are described. Under the aerobic conditions, the manganese bacteria can oxidate Mn2+ into Mn4+. In the course of the manganese bacteria multiplication, the continual increaes of environmental pH is advantageous to the oxidation of manganese and the rise of environmental temperature helps the bacteria to speed the oxidation of manganese ions. The manganese bacteria can fastly oxidate Fe2+ in the culture containing low vaient ferro into Fe3+, its oxidation speed being faster than that of manganese oxide. Under the anaerobic conditions,the manganese bacteria can reduce high valent ferro in solutioninto low valent ferro and distinctly lower the environmental pH.展开更多
Structures and hydration activities of ferro-aluminates (Ca2Fe2-xAlxO5 ,x = 0.0. 57 and 0. 72) of cement minerals are studied by SCF-DV-Xa method. one of the molecular orbital calculating method in quantum chemistry. ...Structures and hydration activities of ferro-aluminates (Ca2Fe2-xAlxO5 ,x = 0.0. 57 and 0. 72) of cement minerals are studied by SCF-DV-Xa method. one of the molecular orbital calculating method in quantum chemistry. The calculated results of net charges, energy levels of molecular orbitals and covalent bond orders are all consistent with the increase of Al element, there is superior hydration activity of Ca2Fe2-xAlxO5.展开更多
In this study, a novel flocculant was prepared by an inorganic polymetric flocculant (IPF) - polysilicate ferro- aluminum sulfate (PSFA) and rectorite (REC). The structure of the PSFA-REC composite was characterized b...In this study, a novel flocculant was prepared by an inorganic polymetric flocculant (IPF) - polysilicate ferro- aluminum sulfate (PSFA) and rectorite (REC). The structure of the PSFA-REC composite was characterized by Fourier transform infrared (FT-IR) spectroscopy and X-ray diffraction (XRD), in order to determine the optimal temperature. The flocculation test was made at 25℃, 45℃ and 65℃, the results indicated that when the temperature was 65℃, the removal efficiency of the oil and COD was the best, which was 87.2% and 92.6% respectively. Then by comparisons among rectorite (REC), PSFA and the composite PSFA-REC at the temperature of 65℃ and the optimal dosage of 11 mg/L, the composite PSFA-REC showed better flocculation performance than flocculant REC and PSFA alone.展开更多
Glass-coated amorphous FeCuNbSiB microwires were prepared by Taylor-Ulitovsky technique. X-ray diffractometry and scanning electron microscopy were used to investigate the microstructure and morphology of the glass-co...Glass-coated amorphous FeCuNbSiB microwires were prepared by Taylor-Ulitovsky technique. X-ray diffractometry and scanning electron microscopy were used to investigate the microstructure and morphology of the glass-coated microwires respectively. The vibrating sample magnetometer and vector network analyzer were used to study the magnetostatic and microwave properties of glass-coated microwires. The experimental results show that the effective anisotropy of an array of 150 microwires of 10 mm in length is large than that of one microwire of 10 mm in diameter and an array of 150 microwires of 1 mm in diameter. The natural ferromagnetic resonance takes place as the microwave magnetic component is perpendicular to the microwires axis, and the electric dipole resonance takes place as the microwire is long or the short microwire concentration is moderate. The natural ferromagnetic resonance shifts to higher frequency with the larger microwire concentration. The electric dipole resonance is governed by the microwires length and concentration. The glass-coated FeCuNbSiB microwires can be used to design EMI filters and microwave absorbing materials.展开更多
Multiferroics, having both magnetic and electric orders withina single material, have been extensively studied for academiccuriosity and possible applications, including energy-efficientmemory and logic devices [1–3]...Multiferroics, having both magnetic and electric orders withina single material, have been extensively studied for academiccuriosity and possible applications, including energy-efficientmemory and logic devices [1–3]. Although several multiferroicmaterials have been reported for bulk single crystals, recentinterest has shifted towards atomically thin magnetic materials.Achieving multiferroic at the limit of few or single atomic layershas become a significant challenging [4,5].展开更多
We investigate the para-ferro magnetic transition of the repulsive SU(N) Hubbard model on a type of oneand two-dimensional decorated cubic lattices, referred as Tasaki lattices, which feature massive singleparticle gr...We investigate the para-ferro magnetic transition of the repulsive SU(N) Hubbard model on a type of oneand two-dimensional decorated cubic lattices, referred as Tasaki lattices, which feature massive singleparticle ground state degeneracy. Under certain restrictions for constructing localized many-particle ground states of flat-band ferromagnetism, the quantum model of strongly correlated electrons is mapped to a classical statistical geometric site-percolation problem, where the nontrivial weights of different configurations must be considered. We prove rigorously the existence of para-ferro transition for the SU(N) Hubbard model on one-dimensional Tasaki lattice and determine the critical density by the transfer-matrix method. In two dimensions, we numerically investigate the phase transition of SU(3),SU(4) and SU(10) Hubbard models by Metropolis Monte Carlo simulation. We find that the critical density exceeds that of standard percolation, and increases with spin degrees of freedom, implying that the effective repulsive interaction becomes stronger for larger N. We further rigorously prove the existence of flat-band ferromagnetism of the SUeNT Hubbard model when the number of particles equals to the degeneracy of the lowest band in the single-particle energy spectrum.展开更多
In this paper, we have established the existence theorem of the weak solution of theboundary problems for systems of ferro-magnetic chain ty means of the viscosity eliminatingmethod and the Leray-Schauder fixed point ...In this paper, we have established the existence theorem of the weak solution of theboundary problems for systems of ferro-magnetic chain ty means of the viscosity eliminatingmethod and the Leray-Schauder fixed point argument.展开更多
文摘Redox mechanism of ferrocene, acetylferrocene, ferrocenyl cinnamenyl ketone at a platinum electrode was studied with cyclic voltammetry (CV) and in-situ Fourier transform infrared (FTIR) spectroelectrochemistry. The IR bands in the range of 2000-1000 cm-1 attributed to the stretching and ring vibrations of these materials show the main spectral changes in the processes.
基金Supported by grants from Research Program of Intractable Disease provided by the Ministry of Health,Labor and Welfare of Japan,and a Grant-in-Aid for Clinical Research from the National Hospital Organization of Japan
文摘AIM:To investigate the relationship between the ironmetabolism-related gene expression profiles and efficacy of antiviral therapy in chronic hepatitis C patients.METHODS:The hepatic expression profile of ironmetabolism-related genes was analyzed and its association with virological response to pegylated-interferon plus ribavirin combination therapy was evaluated.A hundred patients with chronic hepatitis C(genotype1b,n = 50; genotype 2,n = 50) were enrolled and retrospectively analyzed.Liver biopsy samples were subjected to quantitative polymerase chain reaction for iron-metabolismrelated genes and protein expression(Western blotting analysis) for ferroportin.As a control,normal liver tissue was obtained from 18 living donors of liver transplantation.Serum hepcidin level was measured by sensitive liquid chromatography/electrospray ionization tandem mass spectrometry.RESULTS:Iron overload is associated with liver damage by increasing oxidative stress and hepatitis C virus(HCV)is reported to induce iron accumulation in hepatocytes in vivo.Conversely,iron administration suppresses HCV replication in vitro.Therefore,the association between HCV infection and iron metabolism remains unclear.Compared with controls,patients had significantly higher gene expression for transferrin,iron-regulatoryproteins 1 and 2,divalent metal transporter 1,and ferroportin,but similar for transferrin receptors 1 and2,and hepcidin.When the expression profiles were compared between sustained virological response(SVR)and non-SVR patients,the former showed significantly lower transcription and protein expression of hepcidin and ferroportin.Expression of hepcidin-regulating genes,BMPR1,BMPR2,and hemojuvelin,was significantly increased,whereas BMP2 was decreased in HCV-infected liver.BMPR2 and hemojuvelin expression was significantly lower in the SVR than non-SVR group.HCV infection affects the expression of iron-metabolism-related genes,leading to iron accumulation in hepatocytes.CONCLUSION:Decreased expression of hepcidin and ferroportin in SVR patients indicates the importance of hepatocytic iron retention for viral response during pegylated-interferon plus ribavirin treatment.
文摘The study by the author of magnetic scattering neutrons in the structures of ferrimagnets, as well as his experiments with the separation of magnetic charges in dipole pairs ±g in magnetic field, showed that fundamental magnetic particles (magnetic charges) are real structural components of atoms and substance. It is the magnetic poles, and not the moving electric charges are the direct sources of all magnetic fields and magnetic manifestations in Nature. Basic reasons of ignoring the magnetic fundamental particles by world physical theory, for almost 150 years, are the ultra-harsh confinement of these particles in substance which radically is different from the confinement electrons, as well as the vicious concept of the electric magnetism Maxwell. Rotating magnetic dipoles in conductors which are untwisted by electric current, are direct sources of the vortex magnetic field rot<em><strong>H</strong></em>. One should also expect the formation of a vortex electric field rot<em><strong>E </strong></em>forming by rotating electric dipoles which are untwisted by the current of magnetic charges. This article provides an experimental answer to the question: what field is formed around a conductor if joint direct currents of electric<em> <strong style="white-space:normal;"><em>J</em></strong></em><sub>e</sub> and magnetic<strong><em> J</em></strong><sub>g</sub> charges are passed through it? The author’s experiments have shown that in this case the vortex electromagnetic current is realized which manifests itself as the vortex electromagnetic (gravitational) field. It is possible to implement such a process, according to the results of the author’s research, exclusively in superconductors. The vector character of the gravitational field is in many respects similar to the vortex magnetic field which makes it possible to introduce such it states as paragravitation and ferrogravitation into representations. To create joint currents of electric and magnetic charges, the author used the inertial forces of these particles under conditions of acceleration and deceleration of the rotational motion of the closed lead superconductor. The result of this experiment was the gravitational, as it turned out later, the ferrogravitational field, which was detected by effect repulsion of trial cargos from the coil with a superconducting winding at the stage of its untwist. The latter process is defined by the author as an effect of the gravitational (ferrogravitational) levitation. The values of ferrogravitational (levitational) forces noted in this experiment were: 120 mg for a tungsten trial cargo and 50 and 25 mg for a lead cargo with an error of ±15 mg. The values of ferrogravitational (levitational) forces noted in this experiment are: 120 mg for from tungsten trial cargo and 50 and 25 mg for a cargo from lead, with an error of ±15 mg. The “anomaly” noted by the author in this study was in the absence of any absence of a gravitational effect on stage a braking of the coil. Probable cause of the noted “anomaly” is discussed in the Discussion of Results chapter.
文摘The ferro resonance caused by an electromagnetic potential transformer is a frequently occurring internal overvoltage in the power distribution network, and it threatens the safe operation of the network. Fast and accurate detection is the prerequisite for suppression and elimination of ferro resonance. Wavelet transform provides a powerful tool for analysis of nonstationary signals. This paper applies wavelet transform to detect ferro resonance. Analysis results show that it makes extraction of failure information accurate, and fast algorithm makes detection real time.
文摘The experimental results of the redox of manganese and ferro ions by manganese bacteria are described. Under the aerobic conditions, the manganese bacteria can oxidate Mn2+ into Mn4+. In the course of the manganese bacteria multiplication, the continual increaes of environmental pH is advantageous to the oxidation of manganese and the rise of environmental temperature helps the bacteria to speed the oxidation of manganese ions. The manganese bacteria can fastly oxidate Fe2+ in the culture containing low vaient ferro into Fe3+, its oxidation speed being faster than that of manganese oxide. Under the anaerobic conditions,the manganese bacteria can reduce high valent ferro in solutioninto low valent ferro and distinctly lower the environmental pH.
文摘Structures and hydration activities of ferro-aluminates (Ca2Fe2-xAlxO5 ,x = 0.0. 57 and 0. 72) of cement minerals are studied by SCF-DV-Xa method. one of the molecular orbital calculating method in quantum chemistry. The calculated results of net charges, energy levels of molecular orbitals and covalent bond orders are all consistent with the increase of Al element, there is superior hydration activity of Ca2Fe2-xAlxO5.
文摘In this study, a novel flocculant was prepared by an inorganic polymetric flocculant (IPF) - polysilicate ferro- aluminum sulfate (PSFA) and rectorite (REC). The structure of the PSFA-REC composite was characterized by Fourier transform infrared (FT-IR) spectroscopy and X-ray diffraction (XRD), in order to determine the optimal temperature. The flocculation test was made at 25℃, 45℃ and 65℃, the results indicated that when the temperature was 65℃, the removal efficiency of the oil and COD was the best, which was 87.2% and 92.6% respectively. Then by comparisons among rectorite (REC), PSFA and the composite PSFA-REC at the temperature of 65℃ and the optimal dosage of 11 mg/L, the composite PSFA-REC showed better flocculation performance than flocculant REC and PSFA alone.
基金Project(50371029) supported by the National Natural Science Foundation of ChinaProject(NCET-04-0702) supported by the New Century Excellent Talents in University, China
文摘Glass-coated amorphous FeCuNbSiB microwires were prepared by Taylor-Ulitovsky technique. X-ray diffractometry and scanning electron microscopy were used to investigate the microstructure and morphology of the glass-coated microwires respectively. The vibrating sample magnetometer and vector network analyzer were used to study the magnetostatic and microwave properties of glass-coated microwires. The experimental results show that the effective anisotropy of an array of 150 microwires of 10 mm in length is large than that of one microwire of 10 mm in diameter and an array of 150 microwires of 1 mm in diameter. The natural ferromagnetic resonance takes place as the microwave magnetic component is perpendicular to the microwires axis, and the electric dipole resonance takes place as the microwire is long or the short microwire concentration is moderate. The natural ferromagnetic resonance shifts to higher frequency with the larger microwire concentration. The electric dipole resonance is governed by the microwires length and concentration. The glass-coated FeCuNbSiB microwires can be used to design EMI filters and microwave absorbing materials.
文摘Multiferroics, having both magnetic and electric orders withina single material, have been extensively studied for academiccuriosity and possible applications, including energy-efficientmemory and logic devices [1–3]. Although several multiferroicmaterials have been reported for bulk single crystals, recentinterest has shifted towards atomically thin magnetic materials.Achieving multiferroic at the limit of few or single atomic layershas become a significant challenging [4,5].
基金supported by the National Key R&D Program of China(2018YFA0306501)the National Natural Science Foundation of China(11434011,11522436,and 11774425)+4 种基金the Beijing Natural Science Foundation(Z180013)the Research Funds of Renmin University of China(10XNL016 and 16XNLQ03)supported in part by the National Key R&D Program of China(2017YFB0405700)the National Natural Science Foundation of China(11704267)start-up funding from Sichuan University(2018SCU12063)
文摘We investigate the para-ferro magnetic transition of the repulsive SU(N) Hubbard model on a type of oneand two-dimensional decorated cubic lattices, referred as Tasaki lattices, which feature massive singleparticle ground state degeneracy. Under certain restrictions for constructing localized many-particle ground states of flat-band ferromagnetism, the quantum model of strongly correlated electrons is mapped to a classical statistical geometric site-percolation problem, where the nontrivial weights of different configurations must be considered. We prove rigorously the existence of para-ferro transition for the SU(N) Hubbard model on one-dimensional Tasaki lattice and determine the critical density by the transfer-matrix method. In two dimensions, we numerically investigate the phase transition of SU(3),SU(4) and SU(10) Hubbard models by Metropolis Monte Carlo simulation. We find that the critical density exceeds that of standard percolation, and increases with spin degrees of freedom, implying that the effective repulsive interaction becomes stronger for larger N. We further rigorously prove the existence of flat-band ferromagnetism of the SUeNT Hubbard model when the number of particles equals to the degeneracy of the lowest band in the single-particle energy spectrum.
基金Project supported by the National Natural, Science Foundation of China and CAEP.
文摘In this paper, we have established the existence theorem of the weak solution of theboundary problems for systems of ferro-magnetic chain ty means of the viscosity eliminatingmethod and the Leray-Schauder fixed point argument.
基金Project supported by the National Natural science Foundation of china and china Academy of Engineering Physics
文摘The global solvability of homogeneous boundary problem for a class of multidimensional generalized system of ferro-magnetic chain type is considered.
