Browsing Journal Articles by Issue Date
Now showing items 1-20 of 37371
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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 ... -
Tumores mamários espontâneos no rato
(1963) [Journal article]O presente trabalho consta de uma revisão da literatura sôbre [sic] tumoress mamários espontâneos no rato, da descrição de dois casos observados em ratos Wistar e de um comentário sôbre [sic] a importância que representa ... -
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 ... -
Aminoácido do Eupatorium serratum sprengel
(1970) [Journal article]Our investigation have demonstred that amnoacids such as proline, L - glutamine, L - arginine, glutamic acid, isoleucine and others no identified aminoacids are present in a total plant aquous extract of Eupatorium serraton ... -
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 ...
