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Latest Bruce Buchholz Stories

2013-03-05 10:35:15

Human activities are not the primary cause of arsenic found in groundwater in Bangladesh. Instead, a team of researchers from Lawrence Livermore National Laboratory, Barnard College, Columbia University, University of Dhaka, Desert Research Institute and University of Tennessee found that the arsenic in groundwater in the region is part of a natural process that predates any recent human activity, such as intensive pumping. The results appear in the March 4 edition of the Proceedings...

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2010-10-28 14:19:46

Anne M Stark, Lawrence Livermore National Laboratory Beta cells, which make insulin in the human body, do not replicate after the age of 30, indicating that clinicians may be closer to better treating diabetes. Type 1 diabetes is caused by a loss of beta cells by auto-immunity while type 2 is due to a relative insufficiency of beta cells. Whether beta cells replicate after birth has remained an open issue, and is critically important for designing therapies for diabetes. By using radioactive...

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2010-05-19 14:03:24

In a large natural disaster, such as the Haitian earthquake earlier this year, or in an unsolved homicide case, knowing the birth date of an individual can guide forensic investigators to the correct identity among a large number of possible victims. Livermore researcher Bruce Buchholz and colleagues at the Karolinska Institute are looking at victim's teeth to determine how old they are at the time of death. Using the Lawrence Livermore's Center for Accelerator Mass Spectrometry, Buchholz...

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2009-04-03 11:25:00

Researchers have used the amount of carbon 14 in the atmosphere from nuclear testing in the 1950s and 1960s to determine that human heart cells continue to regenerate into adulthood. About 50 percent of heart cells a human is born with will regenerate during their lifetime, scientists reported in the journal Science.The new finding could suggest that doctors could one day be able to artificially stimulate heart cell renewal in patients who have suffered myocardial damage from a heart attack,...

2009-04-03 10:25:30

By using the amount of carbon 14 in the atmosphere from above-ground nuclear testing in the 1950s and 1960, researchers have determined that cells in the human heart develop into adulthood.But as humans age, the percentage of new heart cells decreases markedly. By age 25, renewal of heart cells gradually decrease from 1 percent turning over annually to .45 percent by the age of 75. About 50 percent of the heart cells a human is born with will regenerate during a lifetime.Researchers have...

2008-06-05 07:40:08

Want to get rid of some fat cells as you age? Fat chance. You're stuck with the number of fat cells you have acquired by about age 20, a new study finds. Researchers have known that people gain and lose weight at least in part by changing how much fat is in their fat cells. The new finding is particularly important for obese people, who the researchers say can have twice as many fat cells as their lean counterparts. The finding also suggests that obesity in adulthood is at...


Word of the Day
cruet
  • A vial or small glass bottle, especially one for holding vinegar, oil, etc.; a caster for liquids.
This word is Middle English in origin, and ultimately comes from the Old French, diminutive of 'crue,' flask.
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