Effects of chronic γ-irradiation were investigated in the aquatic microcosm consisting of flagellate algae Euglena gracilis as producers, ciliate protozoa Tetrahymena thermophila as consumers and bacteria Escherichia coli as decomposers. At 1.1 Gy day(-1), no effects were observed. At 5.1 Gy day(-1), cell densities of E. coli showed a tendency to be lower than those of controls. At 9.7 and 24.7 Gy day(-1), population decrease was observed in E. coli. E. gracilis and T. thermophila died out after temporal population decrease and subsequent population increase in T. thermophila. It is likely that this temporal population increase was an indirect effect due to interspecies interactions. Effect dose rates of γ-rays were compared with effect concentrations of some metals using the radiochemoecological conceptual model and the effect index for microcosm. Comparison of these community-level effects data with environmental exposure data suggests that ionising radiation, gadolinium and dysprosium have low risks to affect aquatic microbial communities while manganese, nickel and copper have considerable risks. Effects of chronic irradiation were smaller than those of acute irradiation, and an acute to chronic ratio was calculated to be 28 by dividing an acute dose by chronic daily dose rate at which the effect index was 10%. This ratio would be useful for community-level extrapolation from acute to chronic radiation effects.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.jenvrad.2011.09.005 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
The PROPHECI trial: a phase II, double-blind, placebo-controlled, randomized clinical trial for the treatment of pseudoxanthoma elasticum with oral pyrophosphate.
Trials
January 2025
Université Côte d'Azur, CNRS, LP2M, Nice, France.
Background: /aims. Pseudoxanthoma Elasticum (PXE, OMIM 264800) is an autosomal, recessive, metabolic disorder characterized by progressive ectopic calcification in the skin, the vasculature and Bruch's membrane. Variants in the ABCC6 gene are associated with low plasma pyrophosphate (PPi) concentration.
View Article and Find Full Text PDFWake-up call for recovery: a paradigm shift to address the deep crisis in Israel's public mental health services in the shadow of October 7, 2023.
Isr J Health Policy Res
January 2025
Geha Mental Health Center, Helsinki 1st, Petach-Tikva, +9729258220, Israel.
Background: The events of October 7, 2023, and the subsequent war have starkly exposed the shortcoming of Israel's public mental health system. This system, already strained by years of underfunding and the COVID-19 pandemic, was unprepared for the surge in mental health needs resulting from these traumatic events. This paper outlines the systemic failures and proposes a comprehensive overhaul reform towards an integrative community-based, recovery-oriented mental health service.
View Article and Find Full Text PDFEmerging strategies for nitric oxide production and their topical application as nanodressings to promote diabetic wound healing.
J Nanobiotechnology
January 2025
Department of Biobmedical Engineering and Technology, Institute of Basic Theory for Chinese Medicine, China Academy of Chinese Medical Sciences, Beijing, 100700, China.
The challenges associated with prolonged healing or non-healing of chronic diabetic wounds contribute significantly to the increased incidence of lower limb amputation. A pivotal factor in the impediment of healing is the reduced production of endogenous nitric oxide (NO) due to the hyperglycemic microenvironment typical of chronic diabetes. While both endogenous and exogenous NO have been shown to promote the healing process of diabetic wounds, the direct application of NO in wound management is limited due to its gaseous nature and the risk of explosive release.
View Article and Find Full Text PDFGlucagon like peptide-1 (GLP-1) agonists and cardiometabolic protection: historical development and future challenges.
Cardiovasc Diabetol
January 2025
Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
Glucagon-like peptide-1 receptor agonists (GLP-1RAs) have revolutionized the treatment of cardiometabolic diseases, extending their therapeutic applications far beyond glycemic control in type 2 diabetes (T2D) and obesity. This editorial synthesizes key milestones, from the discovery of GLP-1 to recent clinical trials highlighting the pleiotropic effects of GLP-1RAs in addressing the interconnected spectrum of cardiometabolic conditions, with a focus on cardiovascular, renal, and hepatic benefits. In addition, as GLP-1RAs continue to reshape the management of cardiometabolic disease and global public health, we discuss future challenges to better elucidate their mechanisms of cardiometabolic protection and maximize their therapeutic potential.
View Article and Find Full Text PDFThe moderating effects of nurses' characteristics on the perceptions and practices of family-centered care for chronically ill children and their families in Saudi Arabia.
BMC Nurs
January 2025
Department of Psychiatric and Mental Health, and Community Health, College of Nursing, Qassim University, 51452, Buraydah, Saudi Arabia.
Background/purpose: Nurses play a vital role in providing effective family-centered care (FCC) to enhance the quality of healthcare for children with chronic illnesses and increase family satisfaction. This study aimed to investigate nurses' perceptions and practices of FCC for children with chronic illnesses, and how nursing characteristics influence this relationship.
Method: This multicenter cross-sectional study involved a convenience sample of 405 nurses, each with at least six months of experience caring for chronically ill children, infants, and toddlers in Saudi Arabia.
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!