Radiochemical yields (G-values) of H-adducts of thymine bases of DNA (TH) in frozen (77 K) gamma-irradiated mouse and rat tissues were measured. The content of DNA and the number of TH radicals formed in DNA mass of 10(12)D at a dose of 1 Gy (beta parameter) were determined for each of the studied tissue. It was shown that beta parameter, which indicated DNA in situ radiosensitivity, was different for different tissues: it was higher for radiosensitive tissues. The possible causes of the effect observed are discussed.

Download full-text PDF

Source

Publication Analysis

Top Keywords

beta parameter
8
dna
6
[radiation-induced free
4
free radicals
4
radicals dna
4
dna dna
4
dna level
4
tissues
4
level tissues
4
tissues tissue
4

Similar Publications

Statement Of Problem: Clinical studies evaluating the levels of interleukin-1 beta (IL-1β) in tears and conjunctival secretions of patients with ocular defects after using ocular prostheses are lacking. Therefore, a comparative evaluation of IL-1β levels in the defective eye before and after placement of an ocular prosthesis is needed.

Purpose: The purpose of this clinical study was to compare the microbiota and IL-1β in tears and conjunctival secretions of patients with an ocular defect after using an ocular prosthesis.

View Article and Find Full Text PDF

Variable relative biological effectiveness (RBE) of carbon radiotherapy may be calculated using several models, including the microdosimetric kinetic model (MKM), stochastic MKM (SMKM), repair-misrepair-fixation (RMF) model, and local effect model I (LEM), which have not been thoroughly compared. In this work, we compared how these four models handle carbon beam fragmentation, providing insight into where model differences arise. Monoenergetic and spread-out Bragg peak carbon beams incident on a water phantom were simulated using Monte Carlo.

View Article and Find Full Text PDF

This study explores the development of electrospun nanofibers incorporating bioactive compounds from (Ashwagandha) root extract, focusing on optimizing extraction conditions and nanofiber composition to maximize biological activity and application potential. Using the Design of Experiment (DoE) approach, optimal extraction parameters were identified as 80% methanol, 70 °C, and 60 min, yielding high levels of phenolic compounds and antioxidant activity. Methanol concentration emerged as the critical factor influencing phytochemical properties.

View Article and Find Full Text PDF

Seasonal Pattern of Endo-β-Mannanase Activity During Germination of , Exhibiting Morphophysiological Dormancy.

Plants (Basel)

January 2025

Department of Interdisciplinary Program in Smart Agriculture, Kangwon National University, Chuncheon 24341, Republic of Korea.

Morphophysiological dormancy (MPD) is considered one of the most primitive dormancy classes among seed plants. While extensive studies have examined the occurrence of endo-β-mannanase in seeds with physiological dormancy (PD) or non-dormancy, little is known about the activity of this enzyme in seeds with MPD. This study aimed to investigate the temporal and spatial patterns of endo-β-mannanase activity during dormancy break and germination.

View Article and Find Full Text PDF

Combined Effects of Spirulina Liquid Extract and Endurance Training on Aerobic Performance and Muscle Metabolism Adaptation in Wistar Rats.

Nutrients

January 2025

BiOSSE, Biology of Organisms, Stress, Health, Environment, Institut Universitaire de Technologie, Département Génie Biologique, Le Mans Université, 53020 Laval, France.

Background: Physical activity, such as running, protects against cardiovascular disease and obesity but can induce oxidative stress. Athletes often consume antioxidants to counteract the overproduction of reactive oxygen and nitrogen species during exercise. , particularly its phycocyanin content, activates the Nrf2 pathway, stimulating antioxidant responses.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!