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1

A critical assessment of the radiation doses at a pediatric hospital; Uma avaliacao critica das doses de radiacao em um hospital pediatrico  

Energy Technology Data Exchange (ETDEWEB)

No abstract prepared.

2006-07-01

2

Study of Maytenus aquifolium martius chemical compounds stability face to ionizing radiations (x radiation and gamma radiation); Estudo da estabilidade dos compostos quimicos de Maytenus aquifolium martius frente a radiacao ionizante (X e Y)  

Energy Technology Data Exchange (ETDEWEB)

No abstract prepared

1996-09-01

3

Modalidade de morte em mamiferos expostos a irradiacao de corpo inteiro (sindrome aguda da radiacao). (Modes of death in mammals exposed to whole body radiation (acute radiation syndromes)).  

Science.gov (United States)

When an animal is exposed to a sufficient amount of radiation, there will be changes in many organs of the body, and as a result of either the effects in one particular organ or the interaction of effects in several organs, the animal as a whole will show...

1990-01-01

4

Fusion of protoplasts with irradiated micro protoplasts as a tool for radiation hybrid panel in citrus;Fusao de protoplastos com microprotoplastos irradiados como ferramenta para painel hibrido de radiacao em citros  

Energy Technology Data Exchange (ETDEWEB)

The objective of this work was to combine asymmetric somatic hybridization (donor-recipient fusion or gamma fusion) to microprotoplast-mediated chromosome transfer, as a tool to be used for chromosome mapping in Citrus. Swinglea glutinosa micro protoplasts were irradiated either with 50, 70, 100 or 200 gamma rays and fused to cv. Ruby Red grapefruit or Murcott tangor protoplasts. Cell colonies were successfully formed and AFLP analyses confirmed presence of S. glutinosa in both 'Murcott' tangor and 'Ruby Red' grapefruit genomes. (author)

2009-12-15

5

Gamma radiation (Co{sup 60}) effects on active substances and microbe burden of medicinal plants; Avaliacao dos efeitos da radiacao gama (Co{sup 60}) sobre principios ativos e carga microbiana de plantas medicinais  

Energy Technology Data Exchange (ETDEWEB)

In order to evaluate the effects of radioactivity on active vegetal substances, samples of Fennel (Foeniculum vulgare Miller., fructus), Guarana (Paulinia cupana, Kunth, semen), Gingko (gingko biloba, L., folium), and Kawa-Kawa (Piper methysticum G. Forst, rhizoma), were treated with scaling doses (0 to 25 KGy) of gamma radiation (Co{sup 60}). The 'blind test' methodology was used. The active substances from each sample were analysed by qualitative and quantitative methods after radiation. There were no significant differences seen between the control sample (0 KGy) and the irradiated samples. Microbe contamination was significantly reduced, about 10000 CFU/g, with the initial 5 KGy dose. It was concluded that gamma radiation can be used as an alternative procedure to reduce microbiologic contamination in medicinal plants. Before this procedure can be extended to other medicinal plants, more specific analytical methods are recommended to verify possible structural ...

2001-04-01

6

Utilisation of gamma radiation of Cobalt-60 as quarantine treatment of medicinal plant, aromatic and seasoning plants dehydrated infested by Lasioderma serricorne (Fabricius, 1792) (Coleoptera, Anobiidae) and Plodia interpunctella (Hubner, 1813) (Lepidoptera, Pyralidae); Utilizacao da radiacao gama do Cobalto-60 como tratamento quarentenario de plantas medicinais, aromaticas e condimentares desidratadas infestadas por Lasioderma serricorne (Fabricius, 1792) (Coleoptera, Anobiidae) e Plodia interpunctella (Hubner, 1813) (Lepidoptera, Pyralidae)  

Energy Technology Data Exchange (ETDEWEB)

The research had as objective the use of the gamma radiation of the Cobalto-60 as quarantine treatment of the medicinal plant, aromatic and seasoning plants dehydrated infested by Lasioderma serricorne and Plodia interpunctella determining the disinfestation doses to attend the criterion in the not emergency of adults of the species in study and analysing through the Chromatography of Thin Layer the effect of the gamma radiation of the cobalto-60 on the active principle of extract dehydrated of Chamomilla recutita, Pimpinella anisum, Origanum vulgare, Cymbopogon citratus, Ocimum basilicum and Thymus vulgaris. The work was developed in the Laboratorio de Inseticidas in the Instituto Biologico in Sao Paulo in the period of August of 2005 the June of 2007. The radiation source used gamma was an experimental irradiator of Cobalto-60, model Gamacell 220, located in the Instituto de Pesquisas Energeticas e Nucleares - IPEN, located in Sao Paulo. In the period of 30 days after the irradiation ...

2007-07-01

7

Study of the electron beam irradiation effect on some properties of aromatic aliphatic copolyester films; Estudo do efeito da radiacao por feixe de eletrons nas propriedades de filmes de copoliester alifatico aromatico  

Energy Technology Data Exchange (ETDEWEB)

Biodegradable and green plastics are the new tendency in the world. The effect of the electron beam irradiation in aromatic aliphatic copolyester and the blend with corn starch films (Ecoflex{sup R} and Ecobras{sup R}) were studied by tensile strength at break, elongation at break, Scanning Electronic Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FT-IR), Differential Scanning Calorimetry (DSC), crosslinking degree and biodegradability. The measurements in both, the machine direction and the transverse direction were made for mechanical tests. It was found that, the electron irradiation caused an increase in the strength at break of the blend with corn starch film, when doses of up to 10 kGy were applied. A significant decrease of the elongation at break of the blend with corn starch was observed at doses of 10 kGy and 40 kGy. It was not found important change in tensile properties for aromatic aliphatic copolyester. Structural changes of the samples (crosslinking or ...

2008-07-01

8

Study of the effect of gamma radiation on the molecule of tetracycline concerning its behavior as complexing and extracting agent; Estudo do efeito da radiacao gama sobre a molecula de tetraciclina relativamente ao seu comportamento como agente complexante e extrator  

Energy Technology Data Exchange (ETDEWEB)

Both solvent extraction and spectrophotometric techniques were used to show the alterations that gamma radiation causes in the behavior of tetracycline molecule as far as its extracting and complexing power are concerned. The effect of gamma radiation on the solid tetracycline molecule, benzyl alcohol and on the solution of both was examined in solvent extraction systems whose aqueous phases were made up by {sup 152} Eu-{sup 154}Eu radioactive tracer solutions and whose organic phases were constituted by tetracycline-benzyl alcohol solutions. Experiments were performed in order to determine whether or not the water used for the pre-saturation of benzyl alcohol would influence the radiolysis of tetracycline. Solvent extraction and spectrophotometry were the techniques used to obtain the necessary data. Absorption spectra of irradiated tetracycline benzyl alcohol solutions submitted to several gamma radiation doses were examined and the alterations shown by these spectra were examined. ...

1982-07-01

9

Determination of volatiles produced during radiation processing in food and medicinal herbs; Determinacao de volateis produzidos durante o processamento por radiacao em ervas alimenticias e medicinais  

Energy Technology Data Exchange (ETDEWEB)

In order to protect food from pathogenic microorganisms as well as to increase its shelf life while keeping sensorial properties (e.g. odor and taste), once the latter are one of the main properties required by spice buyers, it is necessary to analyze volatile formation from irradiation of medicinal and food herbs. The aim of the present study was to analyze volatile formation from Co irradiation of Laurus Cinnamomum, Piper Nigrum, Origanum Vulgare and Myristica Fragans. Possible changes on the odor of these herbs are evaluated by characterizing different radiation doses and effects on sensorial properties in order to allow better application of irradiation technology. l he samples have been irradiated in plastic packages by making use of a {sup 60}Co Gamma irradiator. Irradiation doses of 0, 5, 10, 15, 20 and 25kGy have been tested. For the analysis of the samples, SPME has been applied, while for the analysis of volatile compounds, CG/MS. Spice irradiation has promoted mostly ...

2008-07-01