Navigation Links
A buffet for early human relatives

through the enamel, and museum curators wouldn't like that."

Passey, who is working on his Ph.D. degree, "really made terrific advances in the lab to make this [study] possible," Cerling says.

The laser was used to remove samples at various points along the length of the tooth, which is marked by tiny ridges called perikymata. They run parallel to the tooth's crown and represent tooth growth, similar to tree rings. Perikymata are produced under the gums during the animal's juvenile years, when teeth are growing.

Each laser sampling vaporized enamel that formed during several months and thus represented what Paranthropus ate during that period. By taking several samples off the length of each tooth, the researchers reconstructed a few years of each creature's diet.

When the laser is used, the vaporized enamel is confined within a cylindrical chamber a few inches long. Carbon from carbonate in tooth enamel combines with oxygen to produce carbon dioxide gas, which then is analyzed by the mass spectrometer.

Your Teeth are What You Eat

If the sample has a relatively high ratio of carbon-13 to carbon-12, it means the early human relative was eating a diet rich in C4 plants most commonly found on the African savanna, such as seeds and roots from grasses, and grass-like plants called sedges, which include tubers. They also may have eaten animals that grazed on C4 plants.

If a sample has a relatively low ratio of carbon-13 to carbon-12, it means Paranthropus was eating C3 plants, including the leaves and fruits of trees and shrubs, as well as forbs, which are broadleaf herbs that are not grasses. Forests contain almost entirely C3 plants. African savanna has both C3 and C4 plants.

Analyses of the Paranthropus teeth revealed that the early human relatives had diets that varied in the proportion of C3 and C4 plants both seasonally and from year to year. The year-to-year variation in
'"/>

Source:University of Utah


Page: 1 2 3 4

Related biology news :

1. Deep sea buffet for bone-devouring worms
2. UCSB scientists probe sea floor venting to gain understanding of early life on Earth
3. Neuronal traffic jam marks early Alzheimers disease
4. New imaging method gives early indication if brain cancer therapy is effective, U-M study shows
5. In the migratory marathon, parasitized monarchs drop out early
6. Test for early detection of prostate cancer shows promise
7. PET/CT can identify new cancer lesions at early stage, allowing for prompt treatment
8. Confocal imaging promises early detection of skin cancer
9. Measles Deaths Worldwide Drop By Nearly 40% Over Five Years
10. Oldest cranial, dental and postcranial fossils of early modern European humans confirmed
11. A whole lot of shaking goin on triggers early hatching in red-eyed tree frogs
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: buffet for early human relatives

(Date:9/2/2014)... hot oven, you rapidly pull your hand away. Although ... and responding to such painful stimuli, they are still ... made a surprising discovery about the role of a ... built a structural model of the molecule. These discoveries, ... help direct new strategies to treat pain in people. ...
(Date:9/1/2014)... some modest improvement in the last decade in large ... unhealthy trans fats, but the gap in overall diet ... An unhealthy diet is closely linked to cardiovascular ... is an important part of the strategy to prevent ... is important because it can offer guidance for public ...
(Date:9/1/2014)... nucleotidethe basic building block of DNAcould initiate fragile X syndrome, the ... The Journal of Cell Biology . ... gene on the X chromosome called fragile X mental retardation ... 360 men carry a so-called premutation, in which a series of ... is slightly longer than normal. These repeats are prone to even ...
Breaking Biology News(10 mins):Surprising new role for calcium in sensing pain 2Surprising new role for calcium in sensing pain 3Quality of US diet improves, gap widens for quality between rich and poor 2Quality of US diet improves, gap widens for quality between rich and poor 3A nucleotide change could initiate fragile X syndrome 2
... (Sept. 26, 2008) -- Rice University has established a ... for preventing corrosion -- a problem that is estimated ... To develop the center, Rice is ... than 20,000 scientists, engineers and technicians around the world ...
... (September 25, 2008) A light-transmitting compound that could ... in sensors to detect biological and chemical weapons at ... structure was too difficult to examine. Luckily, scientists ... Northwestern University were able to determine the structure of ...
... enzyme called Uch37 is kept in check when it is ... were published in today,s issue of Molecular Cell . ... protein tags (called ubiquitin) from other proteins. The presence of ... it for destruction, but others serve as marks to affect ...
Cached Biology News:Rice University establishes National Corrosion Center 2Argonne scientists peer into heart of compound that may detect chemical, biological weapons 2
(Date:8/29/2014)... are based on electrons, but one of the most ... i.e. circuits based on light (photons) instead of electrons. ... a stream of single photons and control their direction. ... attempts to achieve this control, but now scientists at ... steady stream of photons emitted one at a time ...
(Date:8/29/2014)... , Aug. 29, 2014 /PRNewswire/ - iCo ... ICOTF), today reported financial results for the six ... otherwise, are expressed in Canadian dollars and presented ... Second Quarter 2014 Highlights , Announced ... acuity (VA) primary endpoint for subjects enrolled in ...
(Date:8/29/2014)... (PRWEB) August 29, 2014 A major ... the biotech start-up dense realm of Boston-Cambridge, is gaining ... able investors. James Sherley, the Director of Boston’s Adult ... the local and national visibility of his company an ... 2013. , In addition to a social media marketing ...
(Date:8/28/2014)... Best Sanitizers, Inc., the first company to ... asks food processors and food handling professionals to prepare ... currently using to Best Sanitizers’ Alpet® E3 Plus ... fighting cross-contamination and the spread of pathogens in the ... key criteria that make a hand sanitizer most effective, ...
Breaking Biology Technology:Breakthrough in light sources for new quantum technology 2iCo Therapeutics Announces Second Quarter 2014 Financial Results 2iCo Therapeutics Announces Second Quarter 2014 Financial Results 3iCo Therapeutics Announces Second Quarter 2014 Financial Results 4The Adult Stem Cell Technology Center, LLC Participates in Multiple Stem Cell and Regenerative Medicine Conferences Before Year End 2The Adult Stem Cell Technology Center, LLC Participates in Multiple Stem Cell and Regenerative Medicine Conferences Before Year End 3The Adult Stem Cell Technology Center, LLC Participates in Multiple Stem Cell and Regenerative Medicine Conferences Before Year End 4Food Processors and Food Handlers are Encouraged to Prepare for Fall Harvest by Evaluating Their Current Hand Sanitizer Using Nine Key Criteria 2Food Processors and Food Handlers are Encouraged to Prepare for Fall Harvest by Evaluating Their Current Hand Sanitizer Using Nine Key Criteria 3
... will receive state grants under the Department of ... governor's office said on Monday: , , InvivoSciences ... Developing tests to measure physiological responses of cells. ... planning and grant writing. Makes electronic systems ...
... two-part series looking at the successes of five students from a ... business. , ,Yet it is a widely held truth that biotechnology ... UW-Madisons Master of Science in Biotechnology degree program is ... the brave new world of biotech. , ,The mission of the ...
... Center shows a potential new avenue for stem cell-based ... could enable brain cells that generate dopamine, which helps ... the damage caused by disease. , ,The study involved ... called glial cell-derived neurotrophic factor, or GDNF, which has ...
Cached Biology Technology:UW biotech program launches graduates into evolving industry (part 1) 2UW biotech program launches graduates into evolving industry (part 1) 3Stem cells produce anti-disease protein in brain experiment 2
Mouse polyclonal antibody raised against a partial recombinant MHC2TA. NCBI Entrez Gene ID = 4261...
Mouse monoclonal antibody raised against a partial recombinant JRKL. NCBI Entrez Gene ID = JRKL...
... Polymorphic DNA Technologies also offers a DNA ... of templates including plasmids, PCR products, BACs, ... customer-provided templates such as purified plasmids or ... liquid handling robotics optimized for automated reaction ...
... a premium quality recombinant form of Thermus ... suitable for a wide range of PCR ... reproducible performance, each preparation is extensively tested ... NovaTaq DNA Polymerase possesses an integral 5′→3′ ...
Biology Products: