All posts by LL

Greening Mortar With Olive Waste

The cement industry is one of the world’s largest producers of atmospheric carbon dioxide. The reason is that cement’s calcium carbonate releases the greenhouse gas. Now researchers have shown that they can replace up to 10% of the cement in mortar mixtures without harming the strength of the widely used masonry paste. The cement’s replacement is environmentally friendly, to boot: a waste product from olive oil production (Environ. Sci. Technol., DOI: 10.1021/es200968a).

Continue reading Greening Mortar With Olive Waste

New self-reporting for GM crops

Companies seeking approval for new biotech crops can now prepare their own environmental study or hire an outside contractor to do so. The new options, announced by the US Department of Agriculture’s Animal and Plant Health Inspection Service (APHIS) in April, are part of a two-year voluntary pilot program designed to speed up document preparation, although critics argue such self-reporting is inevitably biased. Currently, genetically modified (GM) crops can take years to approve, as the agency faces a backlog of nearly two dozen petitions, according to APHIS deputy administrator Michael Gregoire. Before a crop can be deregulated, the law requires a preliminary environmental study, followed by a more comprehensive environmental assessment conducted by APHIS (the regulatory arm of the US Department of Agriculture (USDA). The environmental assessment costs the petitioner $75,000–$100,000, although the USDA may decide a crop warrants a more detailed environmental impact statement, which can cost over a million dollars. Continue reading New self-reporting for GM crops

Clunia excavation: One week in

20110710-113821.jpgThis month I’m wearing a different hat. I’m helping English-speaking archaeology students get fieldwork experience at an excavation of an abandoned Roman city about 160 kilometers north of Madrid called Clunia. A Spanish archaeology team is trying to wrap up the remaining corner of a large theatre after about a decade of work there.

Actually, I don’t normally wear a hat at all, but for this dig I’m pressing into service a straw hat I bought 6 years ago for a climbing trip to California’s Sierra Nevada. It’s not Indy’s fedora, but so far it’s fending off the Spanish sun. Thanks to one of the students, Indigo, for this photo.

My friend Mike, a journalist most of the year, has been coordinating ArchaeoSpain, which brings in foreign archaeological students, for the last few years. Before that he’d dug during summers here and at Tiermes, another Roman city in the neighboring province of Soria. He’ll pop in and out of this and some other ArchaeoSpain sites this month. His assistant here at Clunia, Aixa, has worked at Tiermes, Clunia, and at a dig in Egypt. I’ll be helping her wrangle the nine students here this month.

The theatre shows some signs of the city’s rise to regional prominence, decline, looting and abandonment. We’re working on an ash layer right now and some walls that were probably built within the shell of the original theatre a century or two after it was built.

We’re staying in the modern-day hamlet of Peñalba de Castro, perched on the shoulder of old Clunia. Clunia is on high ground–the Romans favored aquifers over river water–so we have energizing views of the neighboring wheat fields. I especially like the fallow ones, which glow bright red thanks to the region’s iron soil.

Mike rents a pair of apartments from Vicente and Consuelo, a couple who also operate the Meson Clunia, where we take our lunch and dinner most days. I share one apartment with four of the ArchaeoSpain students. They hail from Ireland, Australia, and the US, though both Americans are studying in Scotland. Aixa is staying in the other apartment in the same building with five more students from Australia, the US, and Scotland.

We meet every morning at a compound across from the mesón, which contains a warehouse for artifacts and a house for the Spanish archaeologists working on the site. Then we stroll over to the theatre, about 100 meters away, and divide into small groups to work on sections of the site.

The Spanish archaeologists decide what they want us to work on, and Aixa and I translate and explain to the ArchaeoSpain students. We also pitch in wherever we’re most useful.

The first day we cleared a protective layer of sand and textile from the unexcavated portion of the site. We also moved some of the rocks visible in the bottom left corner of the above image. Here’s a picture of one of the local caretakers, Raul, and one of the students, Stephen, moving one:

Most days we work from about 7:30 to about 14:30, take a long lunch, and then shower and nap and spend time on the internet in the afternoon. Dinners are at 21ish. But Thursday last week we went for an afternoon excursion to another site near Aranda de Duero. The site, which another team of archaeologists opened just Monday, contains 50 or 60 skeletons. The remains are from victims of executions during the Spanish Civil War. Local anthropologists had a secondhand tip from a shepherd about the mass grave, which turned out to be much bigger than they expected.

One of the archaeologists told us the grave appeared to have been used six times, with room left for more burials. The skeletons were mostly intact. Some had unique features, such as a glass eye, or a train service vest, which anthropologists hope to use to identify them. A rosary rested on the right hand of one victim. Rubber soles remained attached to most of the bodies’ feet. They will also take the bones to the lab for DNA analysis. As we walked in, anthropologists were recording interviews with locals who either were around in 1936 when the first part of the grave was probably dug, or heard stories from neighbors and family who were. One man was close to tears.

Mass graves are a touchy subject in Spain right now. Victims of the Spanish Republic were quickly disinterred under Franco’s regime and reburied in normal graves with memorials. Victims of Franco were left undocumented and underground until about ten years ago, when the first serious efforts to find them began. Now the government is funding some of the work, but not everybody is happy with it. Mike was at another site, which he reported on for Archaeology, and a passing driver shouted to leave the bodies at rest. Of course, family of Franco’s victims might ask why their family are lost in mass graves while victims of the Republic are in hero’s graves.

Overwhelmed drug regulators seek cure in cooperation

Regulatory authorities such as the US Food and Drug Administration and European Medicines Agency face continual criticism for their plodding pace of drug approval decisions. In 2009, the last year for which complete data are available, the median time for a standard review of a drug application in the US was 13 months—30% longer than the agency’s target for such reviews. But even with this situation, it’s undeniable that both agencies devote far more human and financial resources to the process than most other countries can afford to spend on their own.

To keep up, many other medical regulatory authorities are banding together with one another to share the expertise and clinical results needed to make faster decisions. Continue reading Overwhelmed drug regulators seek cure in cooperation