Lag time of modern bomb-pulse radiocarbon in human bone tissues: New data from Brazil.

Forensic Sci Int

Instituto Nacional de Criminalística. Edifício INC, SPO, Quadra 07 Lote 23, Asa Sul, Brasília, DF 70610-200, Brazil. Electronic address:

Published: February 2022

Radiocarbon analysis with reference to the modern bomb-curve was conducted using 68 bone samples of a vertebral body, femoral diaphysis, occipital bone, and parietal bone of 17 adults from Brazil. All individuals were born in 1963, thus analysis focused on the correlation with atmospheric values during the more recent, falling portion of the curve. Ages at death ranged from 43 to 54 years with representation of both sexes. Lag time (difference between the actual death date and the year of correspondence of the radiocarbon value with the curve) was evaluated for each individual and each tissue. The mean of the lag time values was 20.2 years, and the median was 22.0 years. The femur had the highest lag time median (29.5 years) among the bone groups, followed by the occipital (25.5 years), parietal (23.5 years) and the vertebra (8.0 years). The same pattern was observed for both sexes, but females tended to have lower lag time values than males. Different tissues presented considerable variation in lag time with vertebral bodies the least and the femoral diaphysis the greatest. These data suggest that individual age at death and the associated lag time must be considered in estimating the approximate death date. The lag time values for vertebral bodies were lower and with less variability in comparison with values for the occipital, parietal, and femur indicating greater consistency of that bone group for time since death estimation in the studied sample.

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.forsciint.2021.111143DOI Listing

Publication Analysis

Top Keywords

lag time
32
time values
12
lag
8
femoral diaphysis
8
time
8
vertebral bodies
8
years
7
bone
6
values
5
death
5

Similar Publications

Fibrin film on clots is increased by haematocrit but reduced by inflammation: implications for platelets and fibrinolysis.

J Thromb Haemost

January 2025

Discovery and Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, UK.

Background: Blood clot formation, triggered by vascular injury, is crucial for haemostasis and thrombosis. Blood clots are composed mainly of fibrin fibres, platelets and red blood cells (RBCs). Recent studies show that clot surface also develops a fibrin film, which provides protection against wound infection and retains components such as RBCs within the clot.

View Article and Find Full Text PDF

Scientific evaluation of the effectiveness of ecological restoration could provide support for sustainable management and protection of wetlands. However, due to the multiple and difficult to quantify factors affecting wetlands, commonly used spatiotemporal evaluation methods were difficult to scientifically reflect the actual effectiveness of ecological restoration. This paper took Tianjin Qilihai Wetland, a representative wetland in northern China, as the research object.

View Article and Find Full Text PDF
Article Synopsis
  • Benzene degradation under anoxic conditions has been studied for over 25 years, but the activation mechanism remains unclear due to challenges in cultivating anaerobic benzene-degrading cultures.
  • Our lab has maintained a slow-growing methanogenic enrichment culture named ORM2, which is a unique benzene fermenter related to other known degraders, but it has a long doubling time and lag phase.
  • We created a FISH probe to visualize ORM2 cells, discovering they cluster with methanogens and may produce substances that promote aggregation; higher benzene concentrations seem to hinder this aggregation, shedding light on the community dynamics to improve ORM2's growth rate.
View Article and Find Full Text PDF

Patients with radiographic axial spondyloarthritis (r-axSpA) experience a higher prevalence of fragility fractures, though the pathophysiology of osteoporosis associated with this disease remains poorly understood. The objective of this study was to evaluate the histomorphometric data in r-axSpA patients. Male r-axSpA patients up to 55 years old were enrolled in this cross-sectional study.

View Article and Find Full Text PDF

Effect of ambient O on respiratory mortality and synergies with meteorological factors in Shenyang, China.

Sci Rep

January 2025

Key Laboratory of Semi-Arid Climate Change, College of Atmospheric Sciences, Ministry of Education, Lanzhou University, Lanzhou, 730000, China.

The impact of O on the respiratory system is a significant global problem. Nevertheless, there is insufficient information about its impact on respiratory disorders in northeast China. In this study, we used a generalized additive model (GAM) to determine the correlation between O concentrations and respiratory deaths based on the daily meteorological data, pollutant concentrations, and respiratory deaths from 2014 to 2016 in Shenyang, a typical city in northeast China.

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!