PRESS-NEWS.org - Press Release Distribution
PRESS RELEASES DISTRIBUTION

Leonardo da Vinci definitely did not sculpt the Flora bust

Leonardo da Vinci definitely did not sculpt the Flora bust
2021-04-16
(Press-News.org) "It is machination, it is deception," said the Director General of the Berlin Royal Museums in his defence when criticized for buying a fake. Wilhelm Bode did not budge an inch: the sculpture he acquired in 1909 was an as yet unknown production of the great Renaissance master, Leonardo da Vinci. After one hundred years and numerous controversies, a group of scientists led by a CNRS researcher* has just proven him wrong once and for all. The Flora wax bust, conserved at the Bode Museum in Berlin, recently underwent radiocarbon (14C) dating, which provided both a precise date and an incontrovertible result: it was made in the nineteenth century, nearly 300 years after da Vinci's death. As the sculpture was made primarily from spermaceti, a kind of wax extracted from whales, the researchers had to develop a new calibration method to accurately date the work of art. Their results, which were published on 15 April 2021 in Scientific Reports, show how 14C dating can be applied to unusual materials.

*- The researchers involved work at the Chemistry Research Institute of Paris (CNRS/Chimie ParisTech), the Centre for Research and Restoration of Museums of France (Ministry of Culture), and the Carbon-14 Measurement Laboratory (CEA/CNRS/IRD/IRSN/Ministry of Culture), a national platform managed by the Laboratory for Sciences of Climate and Environment (CNRS/CEA/Université de Versailles Saint-Quentin-en-Yvelines).

INFORMATION:


[Attachments] See images for this press release:
Leonardo da Vinci definitely did not sculpt the Flora bust

ELSE PRESS RELEASES FROM THIS DATE:

Long-term consequences of CO2 emissions

Long-term consequences of CO2 emissions
2021-04-16
The life of almost all animals in the ocean depends on the availability of oxygen, which is dissolved as a gas in seawater. However, the ocean has been continuously losing oxygen for several decades. In the last 50 years, the loss of oxygen accumulates globally to about 2% of the total inventory (regionally sometimes significantly more). The main reason for this is global warming, which leads to a decrease in the solubility of gases and thus also of oxygen, as well as to a slowdown in the ocean circulation and vertical mixing. A new study published today in the scientific journal Nature Communications ...

Generation of super-resolved optical needle and multifocal array using graphene oxide metalenses

Generation of super-resolved optical needle and multifocal array using graphene oxide metalenses
2021-04-16
In a new publication from Opto-Electronic Advances; DOI https://doi.org/10.29026/oea.2021.200031, Researchers led by Professor Baohua Jia at Swinburne University of Technology, Victoria, Australia, Professor Cheng-Wei Qiu at National University of Singapore, Singapore and Professor Tian Lan at Beijing Institute of Technology, Beijing, China considered the generation of super-resolved optical needle and multifocal array using graphene oxide metalenses. Ultrathin and lightweight, metalenses are becoming increasingly significant for their use in photonic chips, biosensors and micro imaging systems such as smart phone cameras. Compared to conventional lenses, metalenses can improve the image quality of current cameras, ...

Egg and sperm cell size evolved from competition

2021-04-16
In most living animals, egg cells are vastly larger than sperm cells. In humans, for example, a single egg is 10 million times the volume of a sperm cell. In a new study, Northwestern University researchers found that competition and natural selection drove this curious size discrepancy. Using mathematical modeling, the researchers considered a time very early in evolution when primordial species reproduced using external fertilization. In the model, bigger reproductive cells, or gametes, presented a competitive edge because they could hold more nutrients for a potential zygote. Smaller gametes, however, required fewer resources to make, which put less stress on the parent. "Organisms either needed to produce the biggest gametes with the most provisions ...

Experiments cast doubts on the existence of quantum spin liquids

Experiments cast doubts on the existence of quantum spin liquids
2021-04-16
When temperatures drop below zero degrees Celsius, water turns to ice. But does everything actually freeze if you just cool it down enough? In the classical picture, matter inherently becomes solid at low temperatures. Quantum mechanics can, however, break this rule. Therefore, helium gas, for example, can become liquid at -270 degrees, but never solid under atmospheric pressure: There is no helium ice. The same is true for the magnetic properties of materials: at sufficiently low temperatures, the magnetic moments known as 'spins', for example, arrange themselves in such a way that they are oriented opposite/antiparallel to their respective neighbors. One can think of this as arrows pointing alternating up and down along a chain or in a checkerboard pattern. It ...

Alpine plants are losing their white "protective coat"

Alpine plants are losing their white protective coat
2021-04-16
Snow cover in the Alps has been melting almost three days earlier per decade since the 1960s. This trend is temperature-related and cannot be compensated by heavier snowfall. By the end of the century, snow cover at 2,500 meters could disappear a month earlier than today, as simulations by environmental scientists at the University of Basel demonstrate. Global warming demands huge adjustments in tourism, hydropower generation and agriculture in alpine areas. But the fauna and flora also have to adapt to rising temperatures. By the end of the century, ...

Dust at work can lead to rheumatic diseases

2021-04-16
If you are exposed to silica (quartz) dust at work - e.g. from working with concrete and granite - you have a greater risk of certain types of rheumatic disease. This is shown by results from Aarhus University and Aarhus University Hospital, which have just been published in the International Journal of Epidemiology. Exposure to silica dust at work, which is the case especially at workplaces within construction and industry, may lead to autoimmune rheumatic diseases. Photo: Unsplash. Exposure to silica dust at work, which is the case especially at workplaces within construction and industry, may lead to autoimmune rheumatic diseases. Photo: Unsplash. As the research results from Aarhus University show, exposure to ...

Press reporting on nuclear waste disposal: National models of watchdog journalism?

2021-04-16
The leading newspapers in two nuclear waste management forerunner countries, Finland and France, fulfil their "watchdog" roles in highly distinct ways. The Finnish Helsingin Sanomat (HS) tends to reproduce government and industry framings, whereas Le Monde cherishes its role as an independent critic of the powers that be. These differences reflect distinct cultural, political and media traditions in the two countries. "The critical watchdog model works in a liberal democracy such as the French, based on mistrust towards the governing elites. But would it backfire in Finland by undermining the very institutional trust that the Nordic democracies have been built upon throughout history?" asks the first author of the article, Research Fellow Markku Lehtonen from the Department of Humanities ...

Underweight and overweight women at higher risk of successive miscarriages

2021-04-16
A new study has shown that underweight and overweight women are at a significantly higher risk of experiencing recurrent miscarriages compared to those of average weight. A research team led by the University of Southampton assessed the link between women's lifestyle and risk of recurrent pregnancy loss, defined as women having two or more consecutive early miscarriages. The systematic review and meta-analysis study has been published in the journal Scientific Reports. Miscarriage is the most common complication of early pregnancy, affecting 15 - 20% of all pregnancies. Recurrent pregnancy loss is a complex disease and although often attributed to numerous medical factors and lifestyle influences, the cause is deemed "unexplained" ...

An antibody-drug combo to combat cancer

An antibody-drug combo to combat cancer
2021-04-16
Tokyo, Japan - Leukemias are debilitating cancers of the hematopoietic or blood-forming cells of the bone marrow. Now, researchers at Tokyo Medical and Dental University (TMDU) describe an ingenious strategy against chronic myelomonocytic leukemia (CMML) wherein an antibody-drug conjugate (ADC) comprising a cytotoxic drug payload linked to an antibody that selectively targets specific cell lines effectively blocks malignant cell proliferation at source. Hematopoietic stem and progenitor cells (HSPCs) continually differentiate into the entire panoply of blood cells, as many as 500 ...

Fast radio bursts shown to include lower frequency radio waves than previously detected

Fast radio bursts shown to include lower frequency radio waves  than previously detected
2021-04-16
Since fast radio bursts (FRBs) were first discovered over a decade ago, scientists have puzzled over what could be generating these intense flashes of radio waves from outside of our galaxy. In a gradual process of elimination, the field of possible explanations has narrowed as new pieces of information are gathered about FRBs - how long they last, the frequencies of the radio waves detected, and so on. Now, a team led by McGill University researchers and members of Canada's CHIME Fast Radio Burst collaboration has established that FRBs include radio waves at frequencies lower than ever detected before, a discovery that redraws the boundaries for theoretical astrophysicists trying to put their finger on the source of FRBs. "We ...

LAST 30 PRESS RELEASES:

The American Society of Tropical Medicine and Hygiene and the Bill & Melinda Gates Foundation announce new research fellowship in malaria genomics in honor of professor Dominic Kwiatkowski

Excessive screen time linked to early puberty and accelerated bone growth

First nationwide study discovers link between delayed puberty in boys and increased hospital visits

Traditional Mayan practices have long promoted unique levels of family harmony. But what effect is globalization having?

New microfluidic device reveals how the shape of a tumour can predict a cancer’s aggressiveness

Speech Accessibility Project partners with The Matthew Foundation, Massachusetts Down Syndrome Congress

Mass General Brigham researchers find too much sitting hurts the heart

New study shows how salmonella tricks gut defenses to cause infection

Study challenges assumptions about how tuberculosis bacteria grow

NASA Goddard Lidar team receives Center Innovation Award for Advancements

Can AI improve plant-based meats?

How microbes create the most toxic form of mercury

‘Walk this Way’: FSU researchers’ model explains how ants create trails to multiple food sources

A new CNIC study describes a mechanism whereby cells respond to mechanical signals from their surroundings

Study uncovers earliest evidence of humans using fire to shape the landscape of Tasmania

Researchers uncover Achilles heel of antibiotic-resistant bacteria

Scientists uncover earliest evidence of fire use to manage Tasmanian landscape

Interpreting population mean treatment effects in the Kansas City Cardiomyopathy Questionnaire

Targeting carbohydrate metabolism in colorectal cancer: Synergy of therapies

Stress makes mice’s memories less specific

Research finds no significant negative impact of repealing a Depression-era law allowing companies to pay workers with disabilities below minimum wage

Resilience index needed to keep us within planet’s ‘safe operating space’

How stress is fundamentally changing our memories

Time in nature benefits children with mental health difficulties: study

In vitro model enables study of age-specific responses to COVID mRNA vaccines

Sitting too long can harm heart health, even for active people

International cancer organizations present collaborative work during oncology event in China

One or many? Exploring the population groups of the largest animal on Earth

ETRI-F&U Credit Information Co., Ltd., opens a new path for AI-based professional consultation

New evidence links gut microbiome to chronic disease outcomes

[Press-News.org] Leonardo da Vinci definitely did not sculpt the Flora bust