To control the authenticity of an old wine without opening the bottle, we developed a few years ago a method based on the measurement of the (137)Cs activity. However, for recent vintages, the (137)Cs activity drops to far too low values (most of the time less than 10 mBq/L for a 10-year-old wine) for this method to perform correctly. In this paper we examine the possibility to date wines using the natural radio-element (210)Pb which has a 22-year period. This new method we propose implies the opening of the bottle and the follow-on destruction of the wine itself, which means that it can only be used for investigating non-expensive bottles or wine lots where there are multiple bottles of the same provenance. Uncertainties on the resulting (210)Pb radioactivity values are large, up to more than 50%, mainly due to local atmospheric variations, which prevents us to carry out precise dating. However it can be used to discriminate between an old wine (pre-1952) and a young wine (past-1990), an information that cannot be obtained with the other techniques based on other isotopes ((137)Cs, (14)C or tritium).
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.jenvrad.2015.01.017 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A Highly Efficient System for Separating Glandular and Non-glandular Trichome of Cucumber Fruit for Transcriptomic and Metabolomic Analysis.
Bio Protoc
January 2025
Department of Vegetable Science, College of Horticulture, China Agricultural University, Beijing, China.
Cucumber () trichomes play a critical role in resisting external biological and abiotic stresses. Glandular trichomes are particularly significant as they serve as sites for the synthesis and secretion of secondary metabolites, while non-glandular trichomes are pivotal for determining the appearance quality of cucumbers. However, current methods for separating trichomes encounter challenges such as low efficiency and insufficient accuracy, limiting their applicability in multi-omics sequencing studies.
View Article and Find Full Text PDFNurses' Techniques for Bottle-Feeding of Infants with Feeding Difficulties: A Qualitative Descriptive Study.
Nutrients
October 2024
Department of Health Sciences, Faculty of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan.
This study identified bottle-feeding techniques for infants with feeding difficulties. Between December 2021 and April 2022, a survey was distributed to nurses with at least 5 years of experience in caring for infants at 1109 hospitals in Japan. The questionnaire included open-ended questions regarding preparation before bottle-feeding, methods of nipple insertion, methods of assisting with sucking, and criteria for continuing bottle-feeding.
View Article and Find Full Text PDFProtecting group free synthesis of nitroxide-functionalized poly(2-oxazoline)s: direct access to electroactive polynitroxides.
Chem Commun (Camb)
November 2024
Centre for Materials Science, School of Chemistry and Physics, Queensland University of Technology, 2 George Street, Brisbane, QLD 4000, Australia.
Herein, we report the simple and direct cationic ring opening polymerization (CROP) of a nitroxide bearing 2-oxazoline monomer to yield redox-active poly[1-oxyl-2,2,6,6-tetramethylpiperidin-4-(2-oxazoline)] (PTOx) with no requirement for protecting group chemistries. The spin and redox activity of the polymer are quantitatively retained as confirmed by cyclic voltammetry and electron paramagnetic resonance spectroscopy, while yielding a comparable oxidation potential to that of PTMA in preliminary electrochemical characterization.
View Article and Find Full Text PDFAssessment of Breastfeeding and Weaning Practices and Their Effects on Infant Growth in Western Maharashtra: A Cross-Sectional Study.
Cureus
September 2024
Family Medicine, Krishna Institute of Medical Sciences, Karad, IND.
Article Synopsis
- Breastfeeding is essential for infant development, providing vital nutrients and antibodies; the World Health Organization recommends exclusive breastfeeding for the first six months, followed by complementary feeding while continuing breastfeeding for up to two years or more.
- * This study focuses on understanding breastfeeding and weaning practices among mothers of infants aged 9-12 months, conducted at Krishna Hospital using a validated questionnaire.
- * Results showed that most mothers began weaning between six to seven months, commonly using dal and rice for feeding, with a significant number using plastic bottles; some mothers also delayed breastfeeding initiation and did not feed colostrum.
Chain-End Controlled Depolymerization Selectivity in α,α-Disubstituted Propionate PHAs with Dual Closed-Loop Recycling and Record-High Melting Temperature.
J Am Chem Soc
October 2024
Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States.
Within the large poly(3-hydroxyalkanoate) (PHA) family, C3 propionates are much less studied than C4 butyrates, with the exception of α,α-disubstituted propionate PHAs, particularly poly(3-hydroxy-2,2-dimethylpropionate), P3H(Me)P, due to its high melting temperature ( ∼ 230 °C) and crystallinity (∼76%). However, inefficient synthetic routes to its monomer 2,2-dimethylpropiolactone [(Me)PL] and extreme brittleness of P3H(Me)P largely hinder its broad applications. Here, we introduce simple, efficient step-growth polycondensation (SGP) of a hydroxyacid or methyl ester to afford P3H(Me)P with low to medium molar mass, which is then utilized to produce lactones through base-catalyzed depolymerization.
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!