Filters
Results 1 - 10 of 7025
Results 1 - 10 of 7025.
Search took: 0.035 seconds
Sort by: date | relevance |
Pires, M.A.F.; Bellintani, S.A.
Instituto de Pesquisas Energeticas e Nucleares, Sao Paulo (Brazil)1985
Instituto de Pesquisas Energeticas e Nucleares, Sao Paulo (Brazil)1985
AbstractAbstract
[en] A simple, fast and sensitive method is outlined for determining fluoride in urine of workers who handle fluoride compounds. The determination is based on the measurement of fluoride by ion selective electrode. Cationic interferents like Ca++, Mg++, Fe+++ and Al+++ are complexed by EDTA and citric acid. Common anions present in urine, such as Cl-, PO---4 and SO--4 do not interfere in the method. (Author)
[pt]
Apresenta-se um metodo simples, rapido e sensivel para a determinacao de fluoreto em urina de pessoal que tem contato com compostos fluorados. A analise baseia-se na medida do ion fluoreto por meio de eletrodo seletivo. Provaveis interferentes cationicos como Ca++, Mg++, Fe+++ e Al+++ sao complexados por EDTA e acido citrico. Anions comumente presentes na urina, como Cl-, PO---4 e SO---4 nao interferem no metodo. (Autor)Original Title
Metodo para a determinacao rotineira de fluoreto em urina por meio de eletrodo seletivo de ions
Primary Subject
Source
1985; 10 p
Record Type
Report
Report Number
Country of publication
LanguageLanguage
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] A simple efficient procedure for extracting and concentrating arginine-8-vasopressin (AVP) from urine has been coupled with a specific and sensitive radioimmunoassay in order to measure antidiuretic hormone (ADH) excretion in normal human under various physiological stimuli. Antisera have been raised in rabbits injected with lysine-vasopressin (LVP) or AVP coupled with bovine serum albumin. The antiserum selected for the assay which inhibits the antidiuresis induced in the rat by AVP is used at a final dilution of 1 : 50,000 and possesses a high association constant of 1x1011 l.mol-1. The limit of detection of the RIA system is 0.5 μUI/ml of urine (1.25 pg). Urinary ADH has been extracted from urine by Miller and Moses method. Mean recovery of added vasopressin averaged 90.2%+-11 (SD) and assay of serial dilutions of such extracts showed that they behave in the assay system in the same way as synthetic AVP standards. Moreover comparison of the results obtained by the RIA to those given by the biological method using the ethanol anesthetized rat showed excellent correlation (r=0.9p<0.001). Under ad libitum fluid and food intake, mean daily urinary excretion of AVP (uncorrected for recovery) determined in 22 subjects was found to be 30.58+-11.64mU/h with no significant difference between men and women. In response to an oral waterload ADH became undetectable at the peak of diuresis. Following a 16 hr fluid deprivation, ADH rose moderately. A significant correlation has been found between urine osmolality and AVP excretion rate
[fr]
Le dosage radioimmunologique de l'ADH urinaire decrit a permis d'etudier l'elimination hormonale dans differentes conditions physiologiques ou pathologiques. Les antiserums ont ete obtenus avec de l'AVP ou de la LVP couplee a de la serum albumine bovine. Les immunserums qui sont capables d'inhiber l'antidiurese induite par l'AVP sur le rat anesthesie a l'ethanol sont utilises a la dilution de 1/50 000 et ont une constante d'association de 1x1011 l.mol-1. La limite de detection est de 0,5 μU/ml d'urine (1,25 pg). L'extraction de l'ADH se fait suivant le protocole de Miller et Moses avec un rendement de 90,2%+-11 et les dilutions successives des extraits montrent que le comportement de ceux-ci est identique a celui de l'AVP. Par ailleurs, la comparaison des resultats obtenus par cette methode et par dosage biologique sur le rat anesthesie a l'ethanol montre une tres bonne correlation (r=0,9 p<0,001). L'elimination d'ADH par 24 heures est de 30,58+-11,64 mU chez 22 sujets normaux sans difference significative entre hommes et femmes. Au maximum de l'elimination d'une charge hydrique, l'ADH n'est plus detectable. Sous restriction hydrique moderee (16 h) l'elimination d'ADH s'eleve moderement. Une correlation tres significative a ete mise en evidence entre l'osmolalite urinaire et l'elimination d'ADHOriginal Title
Dosage radioimmunologique de l'ADH dans les urines chez l'homme
Primary Subject
Record Type
Journal Article
Journal
Annales d'Endocrinologie (Paris); ISSN 0003-4266;
; v. 40(2); p. 99-110

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] An evaluation of Cs-137 elimination in urine is presented. (authors)
Original Title
Studiu privind eliminarea Cs-137 prin urina la un an dupa accidentul nuclear din 26.04.1986
Primary Subject
Source
Central Inst. of Physics, Bucharest (Romania); 828 p; 1988; p. 584-585; Advances in Physics; Progrese in Fizica; Constanta (Romania); 6-8 Oct 1988
Record Type
Miscellaneous
Literature Type
Conference
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
No abstract available
Original Title
Dosage radio-immunologique des produits d'activation de la prothrombine. Application a l'etude du catabolisme de la molecule
Primary Subject
Source
Published in abstract form only.
Record Type
Journal Article
Journal
Nouvelle Revue Francaise d'Hematologie; ISSN 0029-4810;
; v. 24(2); p. 112-113

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] The urinary excretion database built up at Sellafield since the early 1950s was made available for analysis as part of a research programme into plutonium biochemistry. A set of cases was selected for which the data were adequate to support analysis based on a standard pharmacokinetics approach. Cases include exposures from both inhalation and wound deposition, and from plutonium nitrate, oxalate and metal. Data sets extended from 12 years post-exposure up to 25+ year post-exposure. The pharmacokinetics approach was found to be valuable, calling into question certain aspects of ICRP methodology and highlighting areas where further research is required. In particular, it suggested that the distribution equilibrium phase, reached within 3 to 4 years post-exposure, was followed by a terminal equilibrium phase with a half-life of some 12 years. This long-term half-life, which was much shorter than those in ICRP models, persisted for over 20 years in some cases. (author)
Primary Subject
Source
Workshop on intakes of radionuclides: occupational and public exposure; Avignon (France); 15-18 Sep 1997; Available online at http://ntp.org.uk/; Country of input: South Africa
Record Type
Journal Article
Literature Type
Conference
Journal
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
External URLExternal URL
AbstractAbstract
[en] At AWE plc, workers potentially exposed to long-lived alpha emitters, such as plutonium, provide urine samples on a routine basis. Each sample is collected during working hours over a number of days. The activity concentrations in the samples are determined by radiochemical analysis. The creatinine in the samples and the ICRP reference daily excretion rate (1700 mg and 1000 mg for men and women respectively) are used to normalise the activity to a nominal twenty-four hour excretion for dose assessment purposes. This study examines the average and daily variation of creatinine excretion in healthy male and female adults. The advantages of taking samples over an extended period are assessed. There is a large variation in creatinine excretion between individuals and significant deviation from the ICRP recommended values. (author)
Primary Subject
Source
Workshop on intakes of radionuclides: occupational and public exposure; Avignon (France); 15-18 Sep 1997; Available online at http://ntp.org.uk/; Country of input: South Africa
Record Type
Journal Article
Literature Type
Conference
Journal
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
External URLExternal URL
AbstractAbstract
[en] A method for the determination of chromium in urine by atomic absorption spectrometry, using electrothermic atomization with pyrolytic graphite tubes, is proposed. The determinations are performed by standard addition. The method is applicable to biologic monitoring of populations with different degrees of exposition. It is also used in the analysis of chromium in sediments. Results of chromium in urine of a population group non-exposed to the metal are presented. 11 refs
Original Title
Evaluacion de un metodo para la determinacion de cromo en orina por espectrometria atomica
Primary Subject
Record Type
Journal Article
Journal
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] The application of the chemiluminescence system oxide acid-fluorescer-peroxy compound-carbodiimide to biochemical analysis in protic solvents is described. By measuring the integrated chemi-luminescence emission generated by the above reaction, very low concentrations of oxalate (down to 10 mmol l-1) can be determined. Optimized reaction conditions and preanalytical factors permit direct and rapid measurements of urinary oxalate without calcium oxalate precipitation. The system also permits rapid quantitative analysis for urinary porphyrins down to about 200 μg l-1. (author). 12 refs.; 2 figs
Primary Subject
Record Type
Journal Article
Journal
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Thanh, V.T.K.; Orskov, E.R.; Susmel, P.
FAO/IAEA international symposium on sustainable improvement of animal production and health. Synopses2009
FAO/IAEA international symposium on sustainable improvement of animal production and health. Synopses2009
AbstractAbstract
[en] Three cattle calves (Bos Taurus) and three buffalo calves (Bos bubalus) were weaned after receiving colostrum and reared by bottle-feeding of milk. During the first month the animal did not have access to solid food. Urinary purine derivative (PD), concentration, basal PD excretion and glomerular filtrate rate (GFR) were determined during fasting and feeding. After one month the animals were given access to solid feed (urea-treated rice straw 80% and molasses 20%) to stimulate rumen development. At three months of age, while the solid food was given, urinary PD, basal PD excretion and GFR were again determined. Urinary PD excretion both during fasting and milk feeding did not differ significantly between buffaloes to cattle during the period of milk feeding (P > 0.05), but there were highly significant differences between cattle and buffaloes after 3 months of age and two months of access to solid feed (P < 0.01). The GFR was lower in buffaloes than cattle on both milk fed and solid feed periods. It is suggested that the lower GFR found in buffaloes may be the reason for the differences as PD stay longer in the blood to give more time for recycling to the rumen when the rumen is developed and are then metabolized by bacteria. Whether permeability of PD from blood to rumen is an additional factor is not known. (author)
Primary Subject
Source
Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna (Austria); United Nations, New York, NY (United States); World Organization for Animal Health, Paris (France); World Health Organization, Geneva (Switzerland); European Commission, Brussels (Belgium); 461 p; 2009; p. 56-57; FAO/IAEA international symposium on sustainable improvement of animal production and health; Vienna (Austria); 8-11 Jun 2009; IAEA-CN--174/27; Also available on-line: http://www-naweb.iaea.org/nafa/aph/BookOfExtendedSynopses.pdf; 3 refs, 1 fig., 1 tab
Record Type
Report
Literature Type
Conference
Report Number
Country of publication
Reference NumberReference Number
Related RecordRelated Record
INIS VolumeINIS Volume
INIS IssueINIS Issue
Samruaj, B.; Siripirom, L.
Health Physic Div., Office of Atomic Energy for Peace, Bangkok (Thailand)1997
Health Physic Div., Office of Atomic Energy for Peace, Bangkok (Thailand)1997
AbstractAbstract
[en] The separation technique is modified to meet the optimum condition for urinalysis of uranium in routine work. The procedures are based on co-precipitation of uranium with alkaline earth phosphate followed by anion exchange separation. Purified uranium is reduced to IV prior to co-precipitation with neodymium as fluoride. The baseline concentration of uranium isotopes in un-exposure occupations are found to be 0.0021 - 0.0344, 0.0002 - 0.0043 and 0.0044 - 0.0478 p Ci/l for U-238, U-235 and U-234, respectively. The average baseline concentration in term of natural uranium is 0.031 ± 0.018 microgram per litre with the average ratio U-234/U-238 1.72
Primary Subject
Source
Jun 1997; 30 p; ISBN 974-7400-18-9;
; ALSO AVAILABLE FROM OFFICE OF ATOMIC ENERGY FOR PEACE, BANGKOK (THAILAND)

Record Type
Report
Literature Type
Numerical Data
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
1 | 2 | 3 | Next |