Sentences with phrase «bone samples»

The team looked at a certain section of mitochondrial DNA extracted from 0.5 - gram bone samples about half the size of a sugar cube.

Albert Zink of Ludwig - Maximilians University in Munich and his colleagues tested the DNA of bone samples from 91 ancient Egyptian mummies and 70 from old Nubia — modern Sudan — to determine if they had suffered from leishmaniasis.

Bone cryostat sections (7 µm thick) were obtained after decalcification in 3 % nitric acid from 2 to 4 h, depending on the size of bone samples and their brittleness.

Morphological analysis of these ancient bone samples indicate the characteristic island fox morphology, even in the oldest sites [19].

Credits: Text / Project Management: Tara Marathe, Advisor: Laura Zahn, Design / Development: Martyn Green and Andrew Whitesell, Video Interviews: Robert Frederick, Timeline Contributions: Michael Balter and Elizabeth Culotta, Video Capture (Germany) Thanks to: Jörg Noack and Ronny Barr, Images: Johannes Krause (Vindija Cave), Svante Pääbo (map of Neandertal range), Christine Verna with arrangement by Knut Finstermeier (Neandertal bone samples)

Bone samples suggest that even small farms kept a cow or two, a sign of status back in Norway, and written records mention dairy products including cheese, milk, and a yogurt called skyr as essential parts of the diet.

To determine when this special lactose tolerance evolved in Europe, Thomas's team analysed the DNA from 55 bone samples belonging to eight Neolithic Europeans.

Just 7000 years ago, Europeans were unable to digest milk, according to a new analysis of fossilised bone samples — nowadays more than 90 % of this population can.

The Russians shipped bone samples to Germany, where Pääbo's postdoc, Johannes Krause, began grinding them to search for DNA.

Nuclear DNA was also successfully extracted from a 13,000 - year - old emu eggshell and a giant moa eggshell — something has proved difficult with fossil bone samples.

In Schweitzer's lab, bone samples reacted to an antibody to chicken collagen.

Using bone samples from people undergoing hip replacement surgery, the researchers were able to show that the drug — a protein that activates a molecular pathway called the «Wnt» pathway — causes stem cells found within bones to divide and to turn into more bone cells.

To address this debate, the researchers analyzed bone samples from 22 sites in eastern Africa, in inland, coastal and island contexts.

A total of 563 tooth and bone samples dating from the period were genetically screened for Y. pestis.

Their presence in the region may be corroborated by the introduction of the Magdalenians, who carried the genetic signature of Aurignacians and whose bone sample was found in a cave in Northern Spain.

Work has expanded to include new tissue specimens from the Denver Museum of Nature in Science, Denver, Colorado, and to include bone samples from the archaeological collections of the University of Michigan Museum of Zoology, Ann Arbor, Michigan and the professional collection of Dr. Gregory Sohrweide of New York.

Bone samples require a little more custom prep.

As further control, fresh femur bone samples of recent horse (Equus caballus) were also tested, with rates temperature of 60 ″ to 180 ″.

First on Pääbo's list: Neandertal bone samples, to try to produce a Neandertal genome to rival that of the little Denisovan girl.

Recent human bone samples were exposed at temperatures progressively ranging from 100 °C to 800 °C, using a Linkam TS 1500 system, at a constant rate of 100 °C / min.

We examined undecalcified and unstained ground sections, and decalcified and stained cryostat sections of bone samples.

In a paper published August 17, 2017 in the journal PLOS ONE, an international team of researchers, led by Director Nicole Boivin of the Max Planck Institute for the Science of Human History, used new techniques to analyze ancient DNA and proteins from 496 bone samples from 22 island, coastal and inland sites in eastern Africa.

In the 46 bone samples that yielded results in the new study, the team's tests uncovered 14 different haplotypes, or particular sets of genetic variation, 10 of which had never been seen in previous studies.

More of the DNA sequences from the clumped crystals can be reproduced than DNA sequences taken from ground - up whole - bone samples, team member Noreen Tuross of Harvard University in Cambridge, Massachusetts, US, told New Scientist.

Tiger blood, hair, and bone samples have all generated positive results, he says.

Researchers at the University of California, Santa Cruz, were able to estimate the proportion of human - derived food in bears» diets by analyzing chemical isotopes in hair and bone samples.

He teamed up with coauthor Paul Koch, a professor of Earth sciences and dean of physical and biological sciences at UC Santa Cruz, to do the isotope analysis of hair and bone samples.

When Anderson has a bone sample from someone he thinks he can identify but wants to know for sure, he asks the consulate to send saliva or blood samples from that person's family for Baker to analyze.

«Once we'd dealt with the tiny size of the bone samples, the highly degraded state of the DNA, and the lack of any similar genomes to compare to, the analysis was a piece of cake,» said Natural History Museum scientist Dr. Selina Brace.

Bodily fluids will be taken from the best preserved of the victims for study and bone samples will be taken from others.

A new study revealed the complex patterns of migration by ice age humans based on the analysis of their bone samples.

To better constrain the range of temperature of bone modification, we heated recent human and horse (Equus caballus) bone samples to temperatures that range from 100 ° to 800 °C (see data in Table 4), which are typical conditions for PDCs.

The osmium staining technique, developed by Yale researcher Mark Horowitz, PhD, allowed Styner's group to use micro CT scans to color code the bone samples based on the density of the osmium.

Sometimes, the accurate diagnosis also requires microscopic examination of a bone sample (biopsy), using a diagnostic technique called histopathology.