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ENHANCEMENT OF U-234 IN SPRINGWATERS OF AGUAS-DA-PRATA, SAO-PAULO, BRAZIL
(Amer Geophysical Union, 1993-07-01)
Springwater samples were collected at Aguas da Prata, an important spa in São Paulo State, Brazil. The U-238 and U-234 isotopes were evaluated for Platina, Paiol, Villela, Prata-Radioativa, Prata-Nova, Boi, Vitoria, and ...
Uranium isotopes in groundwater occurring at Amazonas State, Brazil
(Elsevier B.V., 2015-03-01)
This paper reports the behavior of the dissolved U-isotopes U-238 and U-234 in groundwater providing from 15 cities in Amazonas State, Brazil. The isotope dilution technique accompanied by alpha spectrometry were utilized ...
The transfer of uranium isotopes U-234 and U-238 to the waters interacting with carbonates from Mendip Hills area (England)
(Elsevier B.V., 2000-04-01)
Laboratory time-scale experiments were conducted on limestone and dolomite gravels from the Mendip Hills area, England, with the purpose of evaluating the release of U-238 and U-234 to different aqueous solutions. The ...
The transfer of uranium isotopes U-234 and U-238 to the waters interacting with carbonates from Mendip Hills area (England)
(Elsevier B.V., 2000-04-01)
Laboratory time-scale experiments were conducted on limestone and dolomite gravels from the Mendip Hills area, England, with the purpose of evaluating the release of U-238 and U-234 to different aqueous solutions. The ...
Incidencia del nivel freático en la capacidad portante del suelo del Pueblo Joven 3 de Octubre manzanas U1, U2, U3 y U4 Nuevo Chimbote - 2019
(Universidad César Vallejo, 2019)
La siguiente investigación se llevó al cabo en las manzanas u1, u2, u3 y u4 del Pueblo Joven
3 de Octubre, teniendo como principal objetivo Determinar la incidencia del nivel freático
en la capacidad portante del suelo ...
New insights into trypanosomatid U5 small nuclear ribonucleoproteins
(Fundacão Oswaldo Cruz, 2014)
Major and minor U small nuclear RNAs genes characterization in a neotropical fish genome: Chromosomal remodeling and repeat units dispersion in Parodontidae
(2022-06-05)
In association with many proteins, small nuclear RNAs (snRNAs) organize the spliceosomes that play a significant role in processing precursor mRNAs during gene expression. According to snRNAs genic arrangements, two kinds ...
Nonnegative solutions of semilinear elliptic equations in half-spaces
(2016)
We consider the semilinear elliptic problem {-Delta u = f (u) in R-+(N) (0.1) u = 0 on partial derivative R-+(N) where the nonlinearity f is assumed to be C-1 and globally Lipschitz with f (0) < 0, and R-+(N) = {x is an ...
Chromosomal Mapping of Repetitive DNA Sequences in Five Species of Astyanax (Characiformes, Characidae) Reveals Independent Location of U1 and U2 snRNA Sites and Association of U1 snRNA and 5S rDNA
(Karger, 2015-01-01)
Astyanax is a genus of Characidae fishes currently composed of 155 valid species. Previous cytogenetic studies revealed high chromosomal diversification among them, and several studies have been performed using traditional ...
A comparative method for evaluating the natural uranium isotopes 238U and 234U in waters
(2015-01-01)
238U is the principal isotope of natural U (99.72% abundance) and is the progenitor of the (4n+2) series of radioelements. The isotope 234U is radiogenic and the decay chain from 238U through 234U proceeds as follows: 238U ...