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A measurement of the Ni⁶⁰ directional correlation with a tunnel diode coincidence circuitClark, Gary Edwin. January 1966 (has links)
LD2668 .T4 1966 C57 / Master of Science
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The decay of 103Pd and 67Ga investigations with two gamma scintillation spectrometers in coincidence.Rietjens, Leonardus Henricus Theodorus. January 1956 (has links)
Proefschrift--Utrecht. / Summary in Dutch. Bibliography: p. 77-79.
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THE RADIOASSAY OF CALCIUM-45 AND STRONTIUM-89 FROM BIOLOGICAL SYSTEMS BY LIQUID SCINTILLATION COUNTINGHardcastle, James Edward, 1932- January 1967 (has links)
No description available.
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The decay of 103Pd and 67Ga; investigations with two gamma scintillation spectrometers in coincidence.Rietjens, Leonardus Henricus Theodorus. January 1956 (has links)
Proefschrift--Utrecht. / Summary in Dutch. Bibliography: p. 77-79.
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Theoretical study of the turbulence-induced scintillation of a dirty laser beam /Duncan, Donald Dean January 1977 (has links)
No description available.
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Total absorption scintillation spectrometerKielkopf, Edward C., 1933- January 1967 (has links)
No description available.
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The measurement of the fast neutron flux at the fast beam port of the KSU Triga Mark II reactorHabiger, Kenneth Edward. January 1966 (has links)
Call number: LD2668 .T4 1966 H116 / Master of Science
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The application of scintillation spectroscopy to an investigation of the neutron induced europium activitiesButler, Harold Sims. January 1956 (has links)
Call number: LD2668 .T4 1956 B87 / Master of Science
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A beta dosimeter and spectrometer utilizing plastic scintillators and a large-area avalanche photodiodeKriss, Aaron A. 03 June 2004 (has links)
The purpose of this research was to develop and test a radiation detector to perform
beta dosimetry and spectroscopy. The detector utilizes plastic scintillator volumes to
produce scintillation light in proportion to the amount of energy deposited in them,
and a large-area avalanche photodiode to convert the light to electrical signals. Pulse
processing electronics transform the electrical signals into a format useful for analysis,
and various software programs are used to analyze the resulting data. The detector
proved capable of measuring dose, as compared to Monte Carlo n-Particle simulations,
to within about 50% or better, depending on geometry and source type. Spectroscopy
results, in conjunction with MCNP-based spectral enhancement methods, proved the
detector capable of recording beta spectra with endpoint energies greater than about
250 keV. The detector shows promise for further development as a portable beta
detector for field use in beta-contaminated areas. / Graduation date: 2005
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Estudo de mineralização, degradação, sorção-dessorção e lixiviação do herbicida aminociclopiraclor em solos brasileiros / Study of mineralization, degradation, sorption-desorption and leaching of the herbicide aminocyclopyrachlor in Brazilian soilsFrancisco, Jeane Gisele 10 September 2014 (has links)
O aminociclopiraclor é o primeiro herbicida sintetizado do grupo químico ácido pirimidinocarboxílico, pertence à classe das auxinas sintéticas, atua em um amplo espectro de plantas daninhas, e está em fase de registro junto a ANVISA. A literatura sobre o aminociclopiraclor ainda é limitada, mas sabe-se que suas principais vantagens são o amplo espectro de controle de plantas daninhas, elevada eficácia em baixas doses de aplicação, e baixa toxicidade a organismos não alvo. Estudos como degradação, sorção - dessorção e lixiviação de herbicidas em diferentes tipos de solos são indispensáveis para revelar a dinâmica do seu comportamento no solo promovendo subsídios para evitar efeitos prejudiciais ao ambiente e as culturas subsequentes. O presente trabalho teve como objetivo a avaliação da dinâmica do herbicida aminociclopiraclor através de ensaios de degradação e mineralização, sorção-dessorção e lixiviação em três solos brasileiros: Latossolo Vermelho distrófico (LVd - textura arenosa), Plintossolo Pétrico concrecionário (FFc - textura argilosa) e Latossolo Vermelho eutrófico (LVe - textura muito argilosa). Os estudos foram realizados no Laboratório de Ecotoxicologia do CENA/USP seguindo as normas da \"Organisation For Economic Co-operation and Development\" (OECD). As taxas de mineralização do aminociclopiraclor nos solos avaliados foram inferiores a 10%, e seguem a seguinte ordem: FFc < LVd < LVe. A concentração extraível do aminociclopiraclor foi reduzida em 37% após 126 dias, indicando a tendência à formação de resíduos ligados. O sistema de eluição utilizado na técnica de cromatografia em camada delgada não foi adequado para separar e qualificar a presença de metabólitos extraíveis. O modelo de Freundlich apresentou ajuste adequado para a sorção e dessorção do aminociclopiraclor, com coeficientes de correlação superiores a 0,99 para os três solos avaliados. Os coeficientes de sorção variaram entre 0,37 e 1,34 enquanto os de dessorção variaram entre 3,62 a 5,36. Os coeficientes de sorção apresentam correlação positiva significativa com os teores de argila, o mesmo comportamento não foi verificado em relação ao pH. Nos solos de textura argilosa (FFc e LVe), o aminociclopiraclor apresentou médias de lixiviação inferiores a 1%, e no solo de textura arenosa (LVd) superior a 3%. As concentrações do herbicida na primeira camada do solo (0-5 cm) apresentaram correlação positiva significativa com os teores de argila e capacidade de troca catiônica, o mesmo não foi observado em relação a matéria orgânica / The aminocyclopyrachlor is the first herbicide of the chemical group pyrimidinecarboxylic acid, belongs to the class of synthetic auxin, acts in a broad spectrum of weeds and is under registration at ANVISA. The literature on the aminocyclopyrachlor is still limited, but it is known that its main advantages are the broad spectrum of weed control, high efficacy at low application rates, and low toxicity to non-target organisms. Studies such as degradation, sorption-desorption and leaching of herbicides in different types of soils are essential to reveal the dynamics of its behavior in the soil promoting subsidies to avoid adverse environmental effects and the subsequent cultures. This study aimed to evaluate the dynamics of herbicide aminociclopiraclor by testing degradation and mineralization, sorption-desorption and leaching in three Brazilian soils: Latossolo Vermelho distrofico (LVd - sandy texture), Plintossolo Petrico concrecionãrio (FFc - clay texture) and Latossolo Vermelho eutrofico (LVe - clay texture). The studies were conducted at the Laboratory of Ecotoxicology CENA/USP, following the rules of the Organisation For Economic Co-operation and Development (OECD). Mineralization rates in the aminocyclopyrachlor evaluated soils were lower than 10%, and follow the following order: FFc <LVd <LVe. The concentration of extractable aminocyclopyrachlor was reduced by 37% after 126 days, indicating the tendency to formation of bound residues. The system elution technique used in thin layer chromatography was inadequate to separate and qualify the presence of extractable metabolites. The Freundlich model showed an adequate fit for the sorption and desorption of aminocyclopyrachlor, with correlation coefficients higher than 0.99 for the three test soils. The sorption coefficients ranged from 0.37 to 1.34 while the desorption ranged from 3.62 to 5.36. The sorption coefficients showed a significant positive correlation with the clay, the same behavior was not observed in relation to pH. In clay soils (FFc and LVe), the aminocyclopyrachlor presented averages less than 1% leaching, and sandy soil (LVd) exceeding 3%. The concentrations of the herbicide in the topsoil (0-5 cm) showed significant positive correlation with clay content and cation exchange capacity, the same was not observed for organic matter
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