نتایج جستجو برای: beta particles

تعداد نتایج: 341549  

2008
Utpal Sarkar

A natural explanation for the smallness of the neutrino mass requires them to be Majorana particles violating lepton number by two units. Since lepton number violation can have several interesting consequences in particle physics and cosmology, it is of utmost importance to find out if there is lepton number violation in nature and what is its magnitude. The neutrinoless double beta decay exper...

Journal: :The Journal of Experimental Medicine 1974
L. J. Ignarro T. F. Lint W. J. George

The purpose of this investigation was to examine the effects of autonomic neurohormones, cyclic nucleotides, and related agents on the immunologic discharge of lysosomal enzymes from, and phagocytosis by, purified human neutrophils. In order to discern the possible intracellular mechanisms by which certain neurohormones influence neutrophil function, the concentrations of cyclic AMP and cyclic ...

Journal: :The Journal of Cell Biology 1993
S J Samuelsson P W Luther D W Pumplin R J Bloch

We used quick-freeze, deep-etch, rotary replication and immunogold cytochemistry to identify a new structure at focal contacts. In Xenopus fibroblasts, elongated aggregates of particles project from the membrane to contact bundles of actin microfilaments. Before terminating, a single bundle of microfilaments interacts with several aggregates that appear intermittently over a distance of several...

2018
Mohammed M. Seddik

The beta-gamma directional correlation involving the first forbidden,2.52 Mev, <#-group in coincidence with the 1.465 Mev 72 S' transition, in the 14-hours decay of Ga, has been measured as a function of energy of the beta-particles . The correlation coefficient A^ was determined at five (Z energies ranging from 1.839 to 2.248 Mev as given below :

2004
Maite Muniesa Aurora García Elisenda Miró Beatriz Mirelis Guillem Prats Juan Jofre Ferran Navarro

We evaluated the presence of various Beta-lactamase genes within the bacteriophages in sewage. Results showed the occurrence of phage particles carrying sequences of bla(OXA-2), bla(PSE-1) or bla(PSE-4) and bla(PSE)-type genes. Phages may contribute to the spread of some Beta-lactamase genes.

2001
P. M. Ivanov I. N. Nesterenko

For particles with small betatron amplitudes the beambeam interaction is like additional linear focusing which results in the beta function distortion. In this paper the observations of this so-called dynamic beta effect for various bunch lengths at the VEPP-2M collider are presented.

Journal: :Antimicrobial agents and chemotherapy 2008
Ruth A Bryan Xianchun Huang Alfred Morgenstern Frank Bruchertseifer Arturo Casadevall Ekaterina Dadachova

We evaluated the clonogenic survival, membrane permeability, metabolic activity (XTT reduction), and apoptosis (FLICA binding) of Cryptococcus neoformans cells subjected to gamma rays from an external source, and beta and alpha particles delivered to fungal cells by capsule-specific antibody. We found that gamma, beta, and alpha radiation affected cells through different pathways.

Journal: :Physical review 2021

We have studied the correlations among three absolute neutrino mass observables---the effective Majorana (${m}_{ee}$) which can be obtained from neutrinoless double beta decay, electron (${m}_{\ensuremath{\beta}}$) is measured in single decay experiments, and sum of light masses ($\mathrm{\ensuremath{\Sigma}}$) constrained cosmological observations, context minimal left-right symmetric model. T...

2016
Tajinder Singh

Bremsstrahlung spectral photon distributions produced by continuous beta particles of beta emitter 147Pm and 45Ca in thick targets studied in a photon energy region 10-30 keV. The bremsstrahlung spectral photon distribution measured with X-PIPS Si (Li) detector. The experimental results were compared with the theoretical bremsstrahlung distribution obtained from ordinary bremsstrahlung (OB) the...

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