Measurements of radon concentration

Adrović, Feriz; Jakupi, B.; Vasić, P.; Mitić, Dragana

doi:10.1016/1350-4487(95)00209-w

Cited by 3 publications

(2 citation statements)

References 1 publication

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“…The literature indicates that radiotherapy leads to dysregulation of microflora (especially intestinal), which is often manifested by a reduction in the number and diversity of intestinal microflora (40) . It is generally accepted that radiation exposure contributes to sterilization (41) . A significant increase in the diversity of microbial species within 1-7 months after finishing RT is most likely associated with a decline in the commensal bacteria counts noted right after the end of RT.…”

Section: Discussionmentioning

confidence: 99%

Urine microbiome changes during and after radiotherapy for prostate cancer

Złoch,

Sibińska,

Monedeiro

et al. 2024

Preprint

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Background: The urinary microbiome may play a new important role in the development of complications, but still, there is no information about their changes during and after radiotherapy (RT). This study aimed to use the matrix-assisted laser desorption/ionization mass spectrometry (MALDI MS) technique to identify the microbiome and assess its changes in urine samples of 88 patients irradiated for prostate cancer. Material and methods: Blood for biochemical analysis and urine samples for MALDI were collected at various time points before gold fiducial implantation (t1) at the beginning (t2) and end of radiotherapy (t3); during follow-up, 1 (t4), 4 (t5), 7 (t6) months after the end of treatment. Results: We identified 1801 different microbial isolates, in 89% (470/528) samples revealed the presence of at least one microbial species among which 79% (373/470) were polymicrobial. Species level: 136 G+, 29 G-, 2 Candida have been noted. The far most abundant group of the identified microorganisms was Staphylococcus members - 51.6% of all isolates followed by Micrococcus (9.1%), Enterococcus (7.6%), Kocuria (5.6%), Corynebacterium (5.4%), and Streptococcus (2.2%). A lower variety of microorganisms incident was observed at the end of RT. The total number of species (TNS) was 50 at t1, increased up to 61 at t2, and then fell to the initial value of 52 at t3. The increase in biodiversity was noted after radiotherapy t4-68, t5-86, and t6-75 (p<0.05). Changes in the biodiversity of the urinary microbiota were also reflected in the differences in the total number of isolates (TNI) - 261, 281, and 273 for time points t1-t3 compared to the 292, 362, and 332 for time points t4-t6 as well as in the total number of detected genera (TNG) - 25, 29, 23 (t1-t3) and 28, 38, 31 (t4-t6). Actinomyces, Corynebacterium, Staphylococcus, Streptococcus, demonstrated significant correlation with the RT stages. Concerning individual species, only K. rhizophila abundance significantly increased with time (p=0.045). Bacteria incidence was strongly correlated with glucose levels in urine. The same correlation was observed for glucose levels in blood, but in a weak manner. Staphylococcus presence was related to higher tPSA. Conclusion: RT for prostate cancer induces a dynamic response in the urinary microbiome, characterized by an initial reduction in diversity post-RT followed by a subsequent increase. Our findings highlight the significant influence of glucose levels in both urine and blood on the urinary microbiota. These insights contribute to the evolving understanding of the interplay between RT, the urinary microbiome, and patient health, paving the way for more targeted interventions and personalized approaches in prostate cancer treatment.

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Section: Discussionmentioning

confidence: 99%

Urine microbiome changes during and after radiotherapy for prostate cancer

Złoch,

Sibińska,

Monedeiro

et al. 2024

Preprint

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“…Their immediate predecessors are radium isotopes which decompose into radon by α-decay. Because of the very short half-life, as well as for the concentrations ratio 235 U/ 238 U in the nature, which is 0.00719, the isotope 219 Rn can be ignored, while the isotope 220 Rn is of less importance due of its short half-life [1].…”

Section: Introductionmentioning

confidence: 99%

Measurements of Environmental Radon Activity Concentration Outdoors in Bosnia and Hercegovina

Damjanovic¹,

Adrovic²,

Tresnjo³

et al. 2015

JMSE-A

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Radon is a unique natural element because it is an inert gas and at the same time radioactive in all of its isotopes. It is known fact that exposure of the population to high concentrations of radon gas, leads to irradiation of primarily respiratory organs, which can cause lung cancer. For reliable prospecting of radon activity concentration in the living environment, the first input parameter is the concentration of outdoor radon in the air. This paper presents the results of a three-year research of radon activity concentration in the air of Bosnia and Herzegovina. At the measurement locations were registered daily and seasonal variations of the outdoor radon concentrations, whose average values were in the range of 15-38 Bq/m 3 . They were measured with Alpha GUARD PQ 2000 radon portable measuring system (Genitron Instruments -Frankfurt).

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Etched track radiometers in radon measurements: a review

Nikolaev

Ilić

1999

Radiation Measurements

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Measurements of radon concentration

Cited by 3 publications

References 1 publication

Urine microbiome changes during and after radiotherapy for prostate cancer

Urine microbiome changes during and after radiotherapy for prostate cancer

Measurements of Environmental Radon Activity Concentration Outdoors in Bosnia and Hercegovina

Etched track radiometers in radon measurements: a review

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