Radioactivity
Mostrando 1-12 de 1658 artigos, teses e dissertações.
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1. Transport of Atrazine Via Leaching in Agricultural Soil with Mineral Oil Addition
RESUMO: Os adjuvantes, como os óleos minerais, são amplamente utilizados na aplicação de herbicidas por reduzir a deriva e a evaporação das gotas, bem como por aumentar a absorção do herbicida pela planta. Contudo, pouco se sabe como o óleo mineral se comporta quando em contato com o solo. Assim, o objetivo desta pesquisa foi avaliar o transporte de
Planta daninha. Publicado em: 17/10/2019
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2. Current Approach in Radiochemical Quality Control of the 99mTc-Radiopharmaceuticals: a mini-review
Abstract To present optimized chromatographic systems for radiochemical purity (RCP) evaluation of 99mTc-eluate and 99mTc-radiopharmaceuticals, as well as to assess doses calibrator reliability for routine purposes in hospital radiopharmacies. RCP was determined by different systems and radioactivity was quantified by TLC-scanner, doses calibrator and gamma-
Braz. arch. biol. technol.. Publicado em: 05/09/2019
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3. Nanotechnology for the treatment of deep endometriosis: uptake of lipid core nanoparticles by LDL receptors in endometriotic foci
OBJECTIVE: Rapidly dividing cells in multiple types of cancer and inflammatory diseases undergo high low density lipoprotein (LDL) uptake for membrane synthesis, and coupling an LDL-like nanoemulsion, containing lipid nanoparticles (LDE) to a chemotherapeutic agent efficiently targets these cells without significant systemic effects. This was a prospective
Clinics. Publicado em: 10/07/2019
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4. Translocation and Root Exudation of Glyphosate by Urochloa brizantha and its Transport on Sugarcane and Citrus Seedlings
RESUMO: O glyphosate é facilmente exsudado pelas raízes das plantas. No entanto, ainda falta informação na literatura científica sobre a braquiária (Urochloa brizantha) é capaz de exsudar o glyphosate a ponto de influenciar o crescimento de culturas, como cana-de-açúcar e citros. Assim, o objetivo desta pesquisa foi avaliar a translocação e exsuda
Planta daninha. Publicado em: 06/05/2019
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5. Knowledge that traveled between Italy and Spain during the Franco regime: the construction of radioactivity counters
Resumo Este artigo propõe uma reflexão sobre os instrumentos e o poder político. O objetivo é analisar como o conhecimento, as experiências, e práticas que circularam e viajaram entre a Itália e a Espanha, por meio dos contadores de radioatividade, construíram e influenciaram tanto a energia nuclear e o poder político durante o regime de Franco. O t
Hist. cienc. saude-Manguinhos. Publicado em: 2019-03
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6. Baseline and Quality Reference Values for Natural Radionuclides in Soils of Rio de Janeiro State, Brazil
ABSTRACT A first large-scale systematic survey of natural radioactivity contents of soils of the state of Rio de Janeiro is presented, focused on the establishment of Quality Reference Values (QRVs). Undisturbed soil samples were collected from 243 areas and analyzed by gamma spectrometry. The activity contents varied largely, ranging from 12.2 to 1,029 Bq k
Rev. Bras. Ciênc. Solo. Publicado em: 22/01/2018
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7. Influence of biomaterials on scintigraphic diagnosis of periprosthetic infections. Ceftizoxime-99m technetium model
Abstract Purpose: To compare the influence of two metallic implants in the diagnosis of periprosthetic infection using 99m technetium-labeled ceftizoxime. Methods: Twenty rats were randomly divided into four groups, which received sterile and contaminated titanium and stainless steel implants. After 3 weeks, scintilographic images were obtained using a ga
Acta Cir. Bras.. Publicado em: 2018-01
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8. Synthesis and antimicrobial evaluation of two peptide LyeTx I derivatives modified with the chelating agent HYNIC for radiolabeling with technetium-99m
Abstract Background Current diagnostic methods and imaging techniques are not able to differentiate septic and aseptic inflammation. Thus, reliable methods are sought to provide this distinction and scintigraphic imaging is an interesting option, since it is based on physiological changes. In this context, radiolabeled antimicrobial peptides have been inve
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 20/05/2016
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9. 40K, 226Ra AND 228Ra SERIES IN BOVINE AND POULTRY FEED AND IN DICALCIUM PHOSPHATE (DCP) SAMPLES BY GAMMA-RAY SPECTROMETRY
The aim of this study is to determine the amounts of radionuclides' activity present in samples of feed for young and adult chicken and feed for dairy and beef cattle, as well as in dicalcium phosphate (DCP) (CaHPO4), used as a nutritional supplement for animal feed. Radioactivity in these samples is due to the presence of the 238U and 232Th radioactive seri
Braz. arch. biol. technol.. Publicado em: 06/05/2016
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10. Scintigraphic imaging with technetium-99M-labelled ceftizoxime is a reliable technique for the diagnosis of deep sternal wound infection in rats
PURPOSE:To evaluate whether scintigraphy with technetium-99m-labeled ceftizoxime (99mTc-CFT) can differentiate mediastinitis from aseptic inflammation associated with sternotomy.METHODS:Twenty female Wistar rats were randomly distributed into four groups: S (control) -partial upper median sternotomy with no treatment; SW (control) - sternotomy and treatment
Acta Cir. Bras.. Publicado em: 2015-09
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11. Deleterious effects of prepubertal corticosterone treatment on rat prostate
PURPOSE:To investigate the structural and functional changes induced by corticosterone (CORT) in the ventral prostrate (VP) of rats in order to study chronic stress effects in the prepubertal phase.METHODS:Wistar rats received daily saline or CORT injections during the pubertal period from the 5th to 25th day of postnatal life. The animals were distributed i
Acta Cir. Bras.. Publicado em: 2015-06
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12. Influence of Annona muricata (soursop) on biodistribution of radiopharmaceuticals in rats
PURPOSE: To evaluate the effect of hydroalcoholic extract of A. muricata on biodistribution of two radiopharmaceuticals: sodium phytate and dimercaptosuccinic acid (DMSA), both labeled with 99mtechnetium.METHODS: Twenty four Wistar rats were divided into two treated groups and two controls groups. The controls received water and the treated received 25mg/kg/
Acta Cir. Bras.. Publicado em: 2014-03