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neutrino mixing matrix and masses from a particular two-zero texture based on A_(4) symmetry

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Communications in Theoretical Physics 2023年第5期75卷 128-141页

作者： n Razzaghi Department of Physics Qazvin BranchIslamic Azad UniversityQazvinIran

The current study aims to investigate the particular case of two zeros in a Majorana neutrino mass matrix based on A_(4) symmetry,where charged lepton mass matrix is *** texture is M_(ν)^(S7) with(μ,μ)and(τ,τ)vanishing element of the neutrino mass *** texture M_(ν)^(S7) has magic and μ−τsymmetry,with a tribimaximal form of the mixing matrix,which leads to θ_(13)=0 that it is not consistent with experimental data and at first,does not seem to be *** θ_(13) a small mixing angle compared to others neutrino mixing angles justifies the use of perturbation *** propose that,θ_(13),and the Dirac phase δ,and two Majorana phases ρ and σ could be generated by using a complex symmetric perturbation mass matrix in the mass basis and find that δm^(2)≡m_(2)^(2)-m_(1)^(2)≠0affect to the atmospheric mixing *** show that only the predictions of the case I,with Δnd Re(α)nsistent with the experimental ***,the allowed range of our parameter space and complex elements of perturbation mass matrix are found,which led to finding the allowed region of the neutrino masses,the Majorana phases,the effective neutrino mass for the neutrinoless double beta decay,the allowed deviation of θ_(23) from 45°,and to predict the normal neutrino mass *** predicted region of and θ_(23) are in line with the current experimental data which indicate the accuracy of our model and its *** results of the case II,with Δ>0 and Re(α)>0,are ruled out.

关键词： two-zero texture A_(4)symmetry tribimaximal mixing matrix perturbation method CP violation phases

On the nature of χ_(c2)(2P):two-gluon decay

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Chinese Physics C 2017年第12期41卷 11-23页

作者： n.n.Achasov 康现伟 Laboratory of Theoretical Physics Sobolev Institute for Mathematics College of nuclear Science and Technology Beijing Normal University Institute of Physics Academia Sinica

We expect that BR（χc2（2P）→gluongluon） ≥2% if the Particle Data Group as well as the Ba Bar and Belle collaborations have correctly identified the state. In reality, this branching ratio corresponds to the one ... 详细信息

关键词： charmonium branching ratio two-gluon decay mode

Monitoring of ground subsidence movements over territory of mines being flooded in Budyonnovsky and Proletarsky districts in Donetsk city with help of GPS-technology

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中国有色金属学会会刊：英文版 2005年第S1期15卷 266-268页

作者： A.V. Antsiferov Y.n. Gavrilenko n.n. Kiselyov UkrnIMI nAS Ukraine Donetsk 83121 UkraineDonetsk National Technical University Donetsk 83000 UkraineUkrNIMI NAS Ukraine Donetsk 83121 Ukraine

This paper considers the processes of activation in ground subsidence movements in flooding mine workings of mines being liquidated in two districts in Donetsk city on the area of more than 60km^2. A concept is given to build up control network of geomechanical monitoring in conditions of existing old mining operations at shallow depths (down to 100m), strong damages of objects of urban building. Given are GPS network structure, layouts for location of basic and local profile lines, special control stations for monitoring ground subsidence movements over the territory of mines being flooded. Results of the series of observations made are discussed and their accuracy is analyzed.

关键词： ground surface movement activation GPS network geomechanical monitoring mine

Site-Specific Conjugation of Cell Wall Polyrhamnose to Protein SpyAD Envisioning a Safe Universal Group A Streptococcal Vaccine

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Infectious Microbes & Diseases 2021年第2期3卷 87-100页

作者： nina J.Gao Satoshi Uchiyama Lucy Pill Samira Dahesh Joshua Olson Leslie Bautista Shilpa Maroju aym Berges Janet ZLiu Raym.nd HZurich nina Mvan Sorge Jeff Fairman neeraj Kapoor Victor nizet Division of Host-Microbe Systems and Therapeutics Department of PediatricsUC San DiegoLa JollaCaliforniaUSA Vaxcyte Inc.Foster CityCaliforniaUSA Department of Medical Microbiology and Infection Prevention Amsterdam University Medical CenterUniversity of AmsterdamAmsterdamThe Netherlands netherlands Reference Laboratory for Bacterial Meningitis Amsterdam University Medical CenterUniversity of AmsterdamAmsterdamThe Netherlands Skaggs School of Pharmacy and Pharmaceutical Sciences UC San DiegoLa JollaCaliforniaUSA

Development of an effective vaccine against the leading human bacterial pathogen group A Streptococcus(GAS)is a public health *** species defining group A cell wall carbohydrate(GAC,Lancefield antigen)can be engineered to remove its immunodominant n-acetylglucosamine(GlcnAc)side chain,implicated in provoking autoimmune cross-reactivity in rheumatic heart disease,leaving its polyrhamnose core(GACPR).Here we generate a novel protein conjugate of the GACPR and test the utility of this conjugate antigen in active *** of conjugation to a standard carrier protein,we selected SpyAD,a highly conserved GAS surface protein containing both B-cell and T-cell epitopes relevant to the bacterium that itself shows promise as a vaccine *** was synthesized using the XpressTM cell-free protein expression system,incorporating a non-natural amino acid to which GACpr was conjugated by site-specific click chemistry to yield high molecular mass SpyAD-GACPR conjugates and avoid disruption of important T-cell and B-cell immunological *** conjugated SpyAD-GACPR elicited antibodies that bound the surface of multiple GAS strains of diverse M types and promoted opsonophagocytic killing by human *** immunization of mice with a multivalent vaccine consisting of SpyAD-GACPR,together with candidate vaccine antigens streptolysin O and C5a peptidase,protected against GAS challenge in a systemic infection model and localized skin infection model,without evidence of cross reactivity to human heart or brain tissue *** general approach may allow GAC to be safely and effectively included in future GAS subunit vaccine formulations with the goal of broad protection without autoreactivity.

关键词： group A Streptococcus Streptococcus pyogenes group A carbohydrate Lancefield antigen conjugate vaccine XpressCFTM non-natural amino acids SpyAD Introduction

OH and O radicals production in atmospheric pressure air/Ar/H_2O gliding arc discharge plasma jet

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Plasma Science and Technology 2017年第12期19卷 71-80页

作者： n C ROY M R TALUKDER A n CHOWDHURY Plasma Science and Technology Laboratory Department of Applied Physics and Electronic EngineeringUniversity of RajshahiRajshahi 6205Bangladesh Bangladesh Council of Scientific and Industrial Research Laboratory Rajshahi Rajshahi 6206Bangladesh

Atmospheric pressure air/Ar/H_2O gliding arc discharge plasma is produced by a pulsed dc power supply. An optical emission spectroscopic（OES） diagnostic technique is used for the characterization of plasmas and for identifications of OH and O radicals along with other species in the plasmas. The OES diagnostic technique reveals the excitation Tx？≈？5550–9000 K, rotational Tr？≈？1350–2700 K and gas Tg？≈？850–1600 K temperatures, and electron density n？（1.1-1.9） ′101 4 cm^（-3） e under different experimental conditions. The production and destruction of OH and O radicals are investigated as functions of applied voltage and air flow rate. Relative intensities of OH and O radicals indicate that their production rates are increased with increasing Ar content in the gas mixture and applied voltage. nereveals that the higher densities of OH and O radicals are produced in the discharge due to more effective electron impact dissociation of H_2O and O_2 molecules caused by higher kinetic energies as gained by electrons from the enhanced electric field as well as by enhanced n *** productions of OH and O are decreasing with increasing air flow rate due to removal of Joule heat from the discharge region but enhanced air flow rate significantly modifies discharge maintenance properties. Besides, Tgsignificantly reduces with the enhanced air flow rate. This investigation reveals that Ar plays a significant role in the production of OH and O radicals.

关键词： reactive oxygen species(ROS) optical emission spectroscopy(OES) gliding arc discharge plasma kinetics broadening mechanism

First isolation of glutinol and a bioactive fraction with good antiinflammatory activity from n-hexane fraction of Peltophorum africanum leaf

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Asian Pacific Journal of Tropical Medicine 2017年第1期10卷 42-46页

作者： Salmon A Adebayo Leshweni J Shai Jacobus n Eloff Phytomedicine Programme Department of Paraclinical SciencesUniversity of Pretoria Department of Biomedical Sciences Faculty of ScienceTshwane University of Technology

Objective: To investigate the anti-inflammatory activity of different fractions and glutinol(isolated compound),using nitric oxide synthase and cyclooxygenase(COX) inhibition as an indication of anti-inflammatory activity,Methods: Anti-inflammatory activity was evaluated using an in vitro assay determining the inhibition of the activity of pro-inflammatory enzyme model,Cyclooxygenases and inducible nitric oxide synthase are crucial enzymes involved in the pathogenesis of many chronic inflammatory conditions,Results: Sub-fraction F3.3 that was derived from n-hexane fraction of PA leaves significantly inhibited(P = 0.01) the catalytic activity of COX-2(IC50 = 0.67 μg/m L) better than isolated compound,glutinol(IC50 = 1.22 μg/m L),compound 2(CP2)(IC50 = 1.71 μg/m L) and sub-fraction F3.3.0(IC50 = 1.30 μg/m L),A similar trend was observed in investigation of the inhibition of nitric oxide synthesis in RAW 264.7 cells by F3.3,glutinol,CP2 and F3.3.0,Inducible COX-2 and inducible nitric oxide synthase are among potent signalling enzymes that exacerbate inflammation,Conclusions: Bioactive sub-fractions(F3.3 and F3.3.0) derived from the n-hexane fraction of PA had good anti-inflammatory activity,and the isolated compound,and glutinol may be useful as a template for the development of new anti-inflammatory drugs.

关键词： Peltophorum africanum COX-1/COX-2 inOS nitric oxide Anti-inflammatory

Instantaneous frequency and wave mode identification in a magnetosheath using few spatial points

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Chinese Physics B 2013年第8期22卷 496-501页

作者： nathaniel E U Beloff n George n J Department of Physics Akwa Ibom State UniversityNigeria University of Sussex Brighton UK

Observational data such as those obtained from the magnetosheath in the downstream of Earth＇s bow shock have waveforms that differ from those of sinusoidal signals. In practice, they are not even aggregates of sinusoidal signals. Therefore, the frequency decomposition for the data requires technique that will account for the time-varying features of the data that will lead to deduction of physical meaning of the observations. The combination of empirical mode decompo- sition （EMD） and Hilbert transform has been used for extracting the various contributing oscillatory modes （EMDs） and the instantaneous frequency determination （Hilbert transform） of every physically meaningful mode called intrinsic mode func- tion （IMF）. The resulting instantaneous frequencies are used to determine instantaneous wave vectors. The combination of the instantaneous frequencies and wave vectors is useful in the identification of wave modes based on the characteristics of the waves. The results show that EMD-Hilbert can be more reliable than simple Hilbert transform alone.

关键词： EMD-Hilbert transform instantaneous frequency and wave vector

Synthesis, characterization,thermal behavior,and antifungal activity of La(Ⅲ) complexes with cinnamates and 4-methoxyphenylacetate

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Journal of Rare Earths 2013年第11期31卷 1106-1113页

作者： Alberto Aragón-Muriel Dorian Polo-Cerón Departamento de Química Universidad del Valle Calle 13 No 100-00 CaliColombia 76001000

In this study a series of trivalent lanthanum complexes with 4-（R）-cinnamate （4-Rcinn, R=H（1）, MeO（2）, Cl（3）） and 4-methoxyphenylacetate ligands （4） were prepared and their antifungal activity against Candida albicans, Aspergillus niger and Trichophyton mentagrophytes were examined. Compounds 1-4 were synthesized by a metathesis reaction and fully characterized by elemental analysis, IR, 1H and 13C nMR spectroscopy, fluorescence spectra, thermogravimetry （TG）, derivative thermogravimetry （DTG）, differential scanning calorimetry （DSC） and X-ray diffraction powder patterns. In emission studies, it was observed that lu-minescence intensity was enhanced in the presence of lanthanide ion. The results of X-ray diffraction patterns indicated that all com-plexes studied exhibited crystalline structure. Thermal behavior by TG, DTG, and DSC studies permitted to estimating the hydration degree of the compounds and showed the formation of decomposition products like lanthanum oxide. Determined by antifungal stud-ies, lanthanum complexes 1-4 demonstrated antifungal activity toward all pathogenic fungal strains tested. Compounds 2 and 4 showed significant growth inhibition for A. niger and C. albicans, respectively.

关键词： antifungal activity La(III) complexes cinnamates 4-methoxyphenylacetate infrared spectra excitation emission TG-DTG-DSC Candida albicans Aspergillus niger Trichophyton mentagrophytes rare earths

Heat Capacity and Thermal Expansion of Water and Helium

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Journal of Thermal Science 2017年第2期26卷 125-131页

作者： n.M.Putintsev D.n.Putintsev Department of Chemistry Murmansk State Technical UniversitySt.Sport 13183010MurmanskRussia Institute for Systems Analysis Federal Research Center《Computer Science and Controb》of the Russian Academy of SciencesPr.60-Letiya Oktyabrya9117312MoscowRussia

Original expressions for heat capacity CV and its components, vibrational and configurational components of thermal expansion coefficient were established. The values of CV, Cvib, Cconf, Cvib and Cconf for water and h... 详细信息

关键词： heat capacity thermal expansion coefficient isothermal compressibility vibrational input configurational input water helium 4.