Tag Archives: Greece

NANoReg invites you to April 11, 2014 workshop in Athens, Greece

For anyone interested in nanomaterials and/or attending an EHS-themed (environment, health, and safety) event in Athens, Greece, NANoREG is holding an April 2014 workshop at the Industrial Technologies 2014 conference (April 9 – 11, 2014). From a March 14, 2014 news item on Nanowerk (Some links have been removed),

NANoREG will identify EHS [environment, health, and safety] aspects that are most relevant from a regulatory point of view. It will provide tools for testing the EHS aspects and the assessment and management of the risks to the regulators and other stakeholders.

To assure that the final results of the project can be implemented in an efficient and effective way, Industry and Regulators are strongly involved in the project.
We kindly invite you to attend the NANoREG workshop and to give your opinion on the regulatory testing of nanomaterials, as a valuable contribution to future economic success of nanotechnology!

The workshop will take place on Friday, April 11, 2014 from 11:15 a.m. to 1:30 p.m. in Athens, Greece, as part of the Industrial Technologies 2014 event. For registration please use the offi cial registration portal: www.naturalway.gr/industrial_technologies

Here’s more about the workshop from the NANoREG workshop page on the Industrial Technologies 2014 website,

1. The NANoREG approach: Answers from Science to the questions/needs of Industry and the Regulation Authorities.
2. First entrypoints, the regulatory questions and needs, an overview, matching of needs
3. NANoREG results: Materials, SOPs and the advancement of Regulatory Risk Assessment and Testing.
4.Overview of the NANoREG projects.
5. Whe window for industry participation, keeping pace with innovation.
6. Modes of collaboartion [sic] for industry.
7. Outlook

A joint workshops of EU FP7 Projects SANOWORK, nanoMICEX and Scaffold funded under the topic NMP.2011.1.3-2 “Worker Protection and exposure risk management strategies for nanomaterials production, use and disposal”, will focus on the main achievements of the three Projects in the related area. All three projects are committed to support the needs of companies and aim to provide a practical overview of the results of current research in the field of management of exposure to nanomaterials.

Here are links to the other three projects collaborating on the NANoREG workshop  SANOWORKnanoMICEX, and Scaffold.

600 BCE (before the common era) was a very good year for French wine

It’s quite the detective story, almost 20 years to unravel the mystery of where and when viniculture started in France. A Penn Museum June 3 (?), 2013 news release (also found on EurekAlert) provides some fascinating detail about the detective work and about wine,

9,000-year-old ancient Near Eastern ‘wine culture,’ traveling land and sea, reaches southern coastal France, via ancient Etruscans of Italy, in 6th-5th century BCE

Imported ancient Etruscan amphoras and a limestone press platform, discovered at the ancient port site of Lattara in southern France, have provided the earliest known biomolecular archaeological evidence of grape wine and winemaking—and point to the beginnings of a Celtic or Gallic vinicultural industry in France circa 500-400 BCE. Details of the discovery are published as “The Beginning of Viniculture in France” in the June 3, 2013 issue of Proceedings of the National Academy of Sciences (PNAS). Dr. Patrick McGovern, Director of the Biomolecular Archaeology Laboratory at the University of Pennsylvania Museum of Archaeology and Anthropology and author of Ancient Wine: The Search for the Origins of Viniculture (Princeton University Press, 2006) is the lead author on the paper, which was researched and written in collaboration with colleagues from France and the United States.

For Dr. McGovern, much of whose career has been spent examining the archaeological data, developing the chemical analyses, and following the trail of the Eurasian grapevine (Vitis vinifera) in the wild and its domestication by humans, this confirmation of the earliest evidence of viniculture in France is a key step in understanding the ongoing development of what he calls the “wine culture” of the world—one that began in the Turkey’s Taurus Mountains, [sic[ the Caucasus Mountains, and/or the Zagros Mountains of Iran about 9,000 years ago.

“Now we know that the ancient Etruscans lured the Gauls into the Mediterranean wine culture by importing wine into southern France. This built up a demand that could only be met by establishing a native industry, likely done by transplanting the domesticated vine from Italy, and enlisting the requisite winemaking expertise from the Etruscans.”

The news release provides a high level (general with too few details for my taste) description of the technology used for this research,

After sample extraction, ancient organic compounds were identified by a combination of state-of-the-art chemical techniques, including infrared spectrometry, gas chromatography-mass spectrometry, solid phase microextraction, ultrahigh-performance liquid chromatography tandem mass spectrometry, and one of the most sensitive techniques now available, used here for the first time to analyze ancient wine and grape samples, liquid chromatography-Orbitrap mass spectrometry.

All the samples were positive for tartaric acid/tartrate (the biomarker or fingerprint compound for the Eurasian grape and wine in the Middle East and Mediterranean), as well as compounds deriving from pine tree resin. Herbal additives to the wine were also identified, including rosemary, basil and/or thyme, which are native to central Italy where the wine was likely made. (Alcoholic beverages, in which resinous and herbal compounds are more easily put into solution, were the principle medications of antiquity.)

Nearby, an ancient pressing platform, made of limestone and dated circa 425 BCE, was discovered. Its function had previously been uncertain. Tartaric acid/tartrate was detected in the limestone, demonstrating that the installation was indeed a winepress. Masses of several thousand domesticated grape seeds, pedicels, and even skin, excavated from an earlier context near the press, further attest to its use for crushing transplanted, domesticated grapes and local wine production. Olives were extremely rare in the archaeobotanical corpus at Lattara until Roman times. This is the first clear evidence of winemaking on French soil.

Here’s what the ancient wine press looks like,

Caption: This is an ancient pressing platform from Lattara, seen from above. Note the spout for drawing off a liquid. It was raised off the courtyard floor by four stones. Masses of grape remains were found nearby. Credit: Photograph courtesy of Michael Py, copyright l'Unité de Fouilles et de Recherches Archéologiques de Lattes.

Caption: This is an ancient pressing platform from Lattara, seen from above. Note the spout for drawing off a liquid. It was raised off the courtyard floor by four stones. Masses of grape remains were found nearby.
Credit: Photograph courtesy of Michael Py, copyright l’Unité de Fouilles et de Recherches Archéologiques de Lattes.

Here’s how McGovern describes his work and its relationship to the history of viniculture in Europe and the ancient Near East, from the news release,

For nearly two decades, Dr. McGovern has been following the story of the origin and expansion of a worldwide “wine culture”—one that has its earliest known roots in the ancient Near East, circa 7000-6000 BCE, with chemical evidence for the earliest wine at the site of Hajji Firiz in what is now northern Iran, circa 5400-5000 BCE. Special pottery types for making, storing, serving and drinking wine were all early indicators of a nascent “wine culture.”

Viniculture—viticulture and winemaking—gradually expanded throughout the Near East. From the beginning, promiscuous domesticated grapevines crossed with wild vines, producing new cultivars. Dr. McGovern observes a common pattern for the spreading of the new wine culture: “First entice the rulers, who could afford to import and ostentatiously consume wine. Next, foreign specialists are commissioned to transplant vines and establish local industries,” he noted. “Over time, wine spreads to the larger population, and is integrated into social and religious life.”

Wine was first imported into Egypt from the Levant by the earliest rulers there, forerunners of the pharaohs, in Dynasty 0 (circa 3150 BCE). By 3000 BCE the Nile Delta was being planted with vines by Canaanite viniculturalists. As the earliest merchant seafarers, the Canaanites were also able to take the wine culture out across the Mediterranean Sea. Biomolecular archaeological evidence attests to a locally produced, resinated wine on the island of Crete by 2200 BCE.

“As the larger Greek world was drawn into the wine culture, “ McGovern noted, “the stage was set for commercial maritime enterprises in the western Mediterranean. Greeks and the Phoenicians—the Levantine successors to the Canaanites—vied for influence by establishing colonies on islands and along the coasts of North Africa, Italy, France, and Spain. The wine culture continued to take root in foreign soil—and the story continues today.”

Where wine went, so other cultural elements eventually followed—including technologies of all kinds and social and religious customs—even where another fermented beverage made from different natural products had long held sway. In the case of Celtic Europe, grape wine displaced a hybrid drink of honey, wheat/barley, and native wild fruits (e.g., lingonberry and apple) and herbs (such as bog myrtle, yarrow, and heath

I wonder why wine displaced Celtic Europe’s hybrid honey drink. Did wine taste better and/or did get folks drunk faster?

For anyone who’s interested in the research, here’s a link to and a citation for the paper,

Beginning of viniculture in France by Patrick E. McGovern, Benjamin P. Luley, Nuria Rovira, Armen Mirzoiand, Michael P. Callahane, Karen E. Smithf, Gretchen R. Halla, Theodore Davidsona, and Joshua M. Henkina. Published online before print June 3, 2013, doi: 10.1073/pnas.1216126110 PNAS June 3, 2013

The paper is behind a paywall.

Antikythera; ancient computer and a 100 year adventure

This post has been almost two years in the making, which seems laughable when considering that the story starts in 100 BCE (before the common era).

Picture ancient Greece and a Roman sailing ship holding an object we know as an Antikythera, named after the Greek island near where the ship was wrecked and where it lay undiscovered until 1900. From the Dec.10, 2010 posting by GrrlScientist on the Guardian science blogs,

Two years ago [2008], a paper was published in Nature describing the function of the oldest known scientific computer, a device built in Greece around 100 BCE. Recovered in 1901 from a shipwreck near the island of Antikythera, this mechanism had been lost and unknown for 2000 years. It took one century for scientists to understand its purpose: it is an astronomical clock that determines the positions of celestial bodies with extraordinary precision. In 2010, a fully-functional replica was constructed out of Lego.

Here’s the video mentioned by Grrl Scientist,

As noted in the video, it is a replica that requires twice as many gears as the original to make the same calculations. It seems we still haven’t quite caught up with the past.

Bob Yirka’s April 4, 2011 article for phys.org describes some of the research involved in decoding the mechanism,

If modern research is correct, the device worked by hand cranking a main dial to display a chosen date, causing the wheels and gears inside to display (via tabs on separate dials) the position of the sun, moon, and the five known planets at that time, for that date; a mechanical and technical feat that would not be seen again until the fourteenth century in Europe with precision clocks.

Now James Evans and his colleagues at the University of Puget Sound in Washington State, have shown that instead of trying to use the same kind of gear mechanism to account for the elliptical path the Earth takes around the sun, and subsequent apparent changes in speed, the inventor of the device may have taken a different tack, and that was to stretch or distort the zodiac on the dial face to change the width of the spaces on the face to make up for the slightly different amount of time that is represented as the hand moves around the face.

In a paper published in the Journal for the History of Astronomy, Evans describes how he and his team were able to examine x-rays taken of the corroded machine (69 then later 88 degrees of the circle) and discovered that the two circles that were used to represent the Zodiac and Egyptian calendar respectively, did indeed differ just enough to account for what appeared to be the irregular movement during different parts of the year.

Though not all experts agree on the findings, this new evidence does appear to suggest that an attempt was made by the early inventor to take into account the elliptical nature of the Earth orbiting the sun, no small thing.

Jenny Winder’s June 11, 2012 article for Universe Today and republished on phys.org provides more details about the gears and the theories behind the device,

The device is made of bronze and contains 30 gears though it may have had as many as 72 originally. Each gear was meticulously hand cut with between 15 and 223 triangular teeth, which were the key to discovering the mechanism’s various functions. It was based on theories of astronomy and mathematics developed by Greek astronomers who may have drawn from earlier Babylonian astronomical theories and its construction could be attributed to the astronomer Hipparchus or, more likely, Archimedes the famous Greek mathematician, physicist, engineer, inventor and astronomer. … [emphases mine]

I’ve highlighted the verbs which suggest they’re still conjecturing as to where the theories and knowledge to develop this ancient computer came from. Yirka’s article mentions that some folks believe that the Antikythera may be the result of alien visitations, along with the more academic guesses about the Babylonians and the Greeks.

I strongly recommend reading the articles and chasing down more videos about the Antikythera on Youtube as the story is fascinating and given the plethora of material (including a book and website by Jo Marchant, Decoding the Heavens), I don’t seem to be alone in my fascination.

Strawberries, silver nanoparticles, and whipped cream

You can hold the whipped cream and strawberries (save them for a dessert) as you process silver nanoparticles using strawberry tree leaves in an environmentally friendly fashion. From the July 11, 2012 news release on EurekAlert,

Strawberry tree leaf (Arbutus unedo) and silver nitrate (AgNO3). With just these two ingredients scientists can now produce silver nanoparticles, a material that is used in advanced technologies from compounds for distributing medicines through to electronic devices, catalysts, contaminant solvents.

The technique has been developed by scientists at the Aristotle University of Thessaloniki (Greece) and Madrid’s Carlos III University (UC3M) and consists of adding an extract of the leaf to a silver nitrate aqueous solution. Silver nanoparticles form immediately after stirring the mixture for some minutes.

“There are other methods for producing them but this process is the most simple, low cost and easy to implement given that a non-toxic plant is used at a temperature of between 25ºC and 80ºC”, outlines Sophia Tsipas, UC3M researcher and coauthor of the study, which is published on the Materials Letters journal.

Tsipas offers more details about the ability to control particle size and geometry,

Tsipas adds that “the innovation of this method lies in the fact that it allows us to control the parameters for obtaining nanoparticles of a known size (from 5 to 40 nm) and geometry (spheres, pyramids, cubes). The nanoparticles produced remained stable over long periods of time of up to 6 months.”

Strawberry tree leaves facilitate such stability as they form an organic layer of various nanometres around the silver particles. What is more, the extract acts as a reducing agent and stabilizer for the entire product.

The nanoparticles obtained have been characterised and verified with various techniques (transmission electron microscopy, ultraviolet spectroscopy and FTIR). As well as optimising the process, the team is currently studying how to produce similar nanometric sized particles with other metals like gold and copper.

The study has been published,

Pantelis Kouvaris, Andreas Delimitis, Vassilis Zaspalis, Dimitrios Papadopoulos, Sofia A. Tsipas, Nikolaos Michailidis. “Green synthesis and characterization of silver nanoparticles produced using Arbutus Unedo leaf extract”. Materials Letters 76: 18, June 2012. Doi:10.1016/j.matlet.2012.02.025.

For those of us in the Northern Hemisphere, happy summer weekend! We are enjoying strawberry season here in BC, Canada.