منابع مشابه
Preventing mercury vapor release from broken fluorescent lamps during shipping.
Fluorescent lamps are estimated to annually release 1 t of mercury into the air in the United States; transport of used lamps may play an important role in these emissions. In 1999, the U.S. Environmental Protection Agency added lamps to the universal waste rule to encourage recycling by allowing shipment to recycling facilities by common carrier. The rules required that lamp packaging must be ...
متن کاملThe replicometer is broken: telomeres activate cellular senescence in response to genotoxic stresses
Telomeres, the ends of our linear chromosomes, can function as 'replicometers', capable of counting cell division cycles as they progressively erode with every round of DNA replication. Once they are critically short, telomeres become dysfunctional and consequently activate a proliferative arrest called replicative senescence. For many years, telomeres were thought to be autonomous structures, ...
متن کاملBroken heart: Broken mind.
The increased frequency of sudden cardiac death after earthquakes and bombings has long proposed that emotional distress plays a role in acute coronary syndromes and arrhythmias. Since the 1960s, several controlled, prospective, epidemiological studies have reported emotional distress as a major risk factor for the onset and worsening of coronary heart disease (CHD) [1]. The Interheart study, a...
متن کاملTelomeres
What are they? Telomeres are the natural tips of chromosomes. They consist of tandem arrays of simple G-rich repetitive DNA sequences that are complexed with proteins. The fundamental tools for keeping telomeres healthy are amazingly similar in both single cell eukaryotes, such as yeast and ciliated protozoa, and human cells. What do they do? Telomeres have two important duties. First, they are...
متن کاملP REPARATION OF A NEW MEDIUM FOR IN VITRO CULTURE OF BORRELIA MICROTTI AND BORRELIA PERSICA
Borrelia microtti and Borrelia persica are two Iranian strains of spirochetes whose vectors are Ornithodorous tholozani and Ornithodorous erraticus which are responsible for relapsing fever. BSK medium has been used for in vitro culture of other strains of borrelia, although the two mentioned strains could not be successfully cultured in it. We have modified BSK medium by using guinea pig ...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 2010
ISSN: 0021-9258
DOI: 10.1074/jbc.m110.150060