Olfactory thresholds for four odorants were determined in groups of monozygotic and dizygotic human twins. Odorants were presented in an ascending dilution series in odorless solvent, using a three-way forced choice method. For two of the tested odorants, 5 alpha-androst-16-en-3-one and isoamyl acetate, the thresholds showed a strong genetic component. This was demonstrated by respective values of 0.78 and 0.73 for the intraclass correlation difference, and of z = 3.69 and z = 2.71 in a within-pair difference analysis. The results for isoamyl acetate are novel, and suggest that genetic polymorphism in the affinity of odorant receptor proteins contributes to the (nearly normal) threshold distribution for this odorant.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/0304-3940(92)90347-a | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Neonatal outcomes in twin pregnancies in Finland from 2008 to 2023.
Eur J Pediatr
January 2025
Institute of Clinical Medicine and Department of Pediatrics, University of Eastern Finland, Kuopio, Finland.
Unlabelled: Twin pregnancies are associated with higher risks of adverse maternal and neonatal outcomes compared to singleton pregnancies. This retrospective nationwide cohort study analyzed trends in twin pregnancy outcomes in Finland from 2008 to 2023 using data from the Finnish Medical Birth Register. Outcomes assessed included perinatal mortality, stillbirths, neonatal mortality, neonatal intensive care unit (NICU) admissions, and hospitalization rates at one week of age.
View Article and Find Full Text PDFTwo Babies, Two Bonds: Challenges in Attachment Relationships in Twins.
Cureus
December 2024
Department of Child and Adolescent Psychiatry, Local Health Unit of Santo António, Porto, PRT.
The attachment relationship constitutes the first emotionally significant affective bond, usually between the infant and the mother, serving as a model for subsequent relationships. It is considered a vital component of social and emotional development in the early years and an important early indicator of infant mental health. In twins, the attachment process may exhibit unique characteristics, influenced by the dual parenting dynamic and the individual needs of each baby.
View Article and Find Full Text PDFThe moderating and mediating role of the placenta in the association between prenatal exposure to air pollutants and birth weight: A twin study.
Environ Res
January 2025
Department of Epidemiology, NUTRIM School for Translational Research in Metabolism, Maastricht University Medical Centre, P.O. Box 616, 6200 MD Maastricht, The Netherlands. Electronic address:
Prenatal exposure to air pollution has been linked to lower birth weight, yet the role of the placenta in this association is often overlooked. This study investigates whether placental characteristics act as moderators or mediators in the association between prenatal exposure to particulate matter (PM) and nitrogen dioxide (NO) and birth weight in twins. The study included 3340 twins (born 2002-2013) from the East Flanders Prospective Twin Survey.
View Article and Find Full Text PDFMedical Digital Twin: A Review on Technical Principles and Clinical Applications.
J Clin Med
January 2025
Neuroradiology Unit, Ospedale del Mare ASL NA1 Centro, 80145 Naples, Italy.
The usage of digital twins (DTs) is growing across a wide range of businesses. The health sector is one area where DT use has recently increased. Ultimately, the concept of digital health twins holds the potential to enhance human existence by transforming disease prevention, health preservation, diagnosis, treatment, and management.
View Article and Find Full Text PDFNaturally occurring, rostrally conjoining chicken twins attempt to make a forebrain.
Dev Biol
January 2025
Institute of Life Sciences and Health (ILSH), School of Medicine, Pharmacy and Biomedical Sciences, University of Portsmouth, Portsmouth, PO1 2DT, UK. Electronic address:
Conjoined twinning is a special case of monozygotic, monoamniotic twinning. Human conjoined twinning, and vertebrate conjoined twinning in general, is a very rare phenomenon. It has been suggested that the risk of conjoined twinning increases with some medication and upon assisted reproduction.
View Article and Find Full Text PDFWant 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!