Browsing Scientific Production by Issue Date
Now showing items 1-20 of 79732
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Dilatação térmica linear de refratários silico-aluminosos nacionais
(1955) [Journal article]No presente trabalho é determinada a dilatação térmica linear reversivel de alguns refratários sílico-aluminosos nacionais, notadamente dos produzidos pelas indústrias de refratários do Estado do Rio Grande do Sul (Brasil), ... -
Problemas de pesquisa na indústria nacional de produtos estruturais de argila
(1957) [Journal article] -
Ensaio de uma teoria eclética da ação
(1958) [Journal article] -
Investigation of medium and heavy nuclei by quasi-free-proton scattering
(1960) [Journal article] -
A importância do tono vasomotor na regulação da taquicardia compensadora
(1961) [Journal article]Com o objetivo de investigar qual o mecanismo mais importante ria regulação da taquicardia compensadora provocada em cães por meio da administração de diferentes doses de acetilcolina, foram utilizados animais com ligadura ... -
Quantum electrodynamics with zero bare ferminon mass
(1964) [Journal article] -
Análise do complexo de ativação ventricular no pós-operatório da comunicação interatrial
(1966) [Journal article]Estudamos o comportamento do eletrocardiograma - complexo de ativação ventricular - em 60 casos comprovados de CIA do tipo ostium secundum. Analisamos as características morfológicas, de tempo, de magnitude e orientação ... -
Spontaneously broken symmetries and current conservation
(1966) [Journal article] -
Studies of quadrupole interactions by means of angular correlations
(1967) [Journal article]Measurements of the nuclear quadrupole interaction have been made for the first 5/2+ excited state of Ta181 in severa! compounds of Hf, and for the first 5/2+ excited state of Cdll1 in In metal by time-differential and by ... -
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Evidence for sinusoidal phase modulation in small self-trapped filaments
(1968) [Journal article]Evidence is presented indicating that, in some cases at least, a sinusoidal phase modulation is responsible for the spectral broadening Observed in trapped filaments of laser (and Raman) light. This kind of modulation has ... -
Charge commutator for any momentum
(1969) [Journal article]The nucleon matrix elements of the charge commutation relations are considered for arbitrary momentum. The resulting expression is exact. The high-momentum limit reduces to the Alder-Weisberger sum rule. For zero momentum ... -
Mossbauer effect in frozen solutions of nitroprusside
(1969) [Journal article] -
Interpretation of nuclear quadrupole constants in compounds of 181Ta
(1969) [Journal article] -
Measurement of the g-factor of the 3/sup -/ octopole vibrational state in /sup 208/pb
(1969) [Journal article]The nuclear g-factor of the collective 3- level at 2615 keV in 208pb has been measured by the perturbed angular correlation technique. The result of g(3-) = 0.58 ± 0.14 confirms the strongly collective character of the state. -
Internal magnetic fields at Hg and TI in ferromagnets
(1969) [Journal article]With the perturbed angular correlation method the hyperfine magnetic fields acting at 198Hg nuclei embedded in Fe, Co and Ni lattices are found to be -440 J: 105 kG, -370 :~ 78 kG and -86 J: 22 kG, respectively. The measured ... -
Influence of simultaneous static and time dependent quadrupole interactions on gamma-gamma angular correlations
(1969) [Journal article]We derive the forro of the perturbation factors for the angular correlation of two successive Y rays when the intermediate state is under the influence of an axially symmetric static electric field gradient plus a small ... -
Renormalization and gauge invariance in quantum electrodynamics
(1970) [Journal article]The connection between the field theory and the perturbation expansion of quantum electrodynamics is studied. As a starting point the usual Lagrangian is taken but with bare electron mass and the renormalization constant ... -
Isomer shift and electronegativy in compounds of tin and group -VI elements
(1970) [Journal article]Using the Mössbauer effect in 119Sn we have measured the isomer shift in compounds of divalent and tetravalent tin with elements of Group VI. The isomer shift is linearly dependent on the values of electronegativity in ... -
Rare-earth tri-iodides-mossbauer effect using /sup 129/i
(1970) [Journal article]
