منابع مشابه
Defusing redox bombs?
Proteins catalyze crucial reactions via unstable, high-energy chemical intermediates. In the absence of physiological substrates, activated redox cofactors become ticking time bombs, capable of producing oxidative damage to the protein. In PNAS, Gray and Winkler (1) propose that chains of tryptophan (Trp) and tyrosine (Tyr) residues may serve as escape routes for potentially damaging, highly ox...
متن کاملMagma balloons or bombs?
To the Editor — Detailed analysis of volcanic materials1 allows the study of eruptions that have not been witnessed directly. Rotella et al.2 undertake the challenge of interpreting submarine volcaniclastic deposits around Macauley Volcano, part of the Kermadec Arc in the southwest Pacific Ocean. They propose a ‘Tangaroan’ eruption style, based on the textural characteristics of dredged pumice ...
متن کاملCluster Bombs: The Indiscriminate Killer
Extensively used by US forces in Vietnam, the 1991 Gulf War, Kosovo and Afghanistan, and by Israel in the 1982 siege of West Beirut, cluster bombs have received severe condemnation from human rights and humanitarian organisations. There is consensus in the international community that these weapons are unacceptable and in breach of international humanitarian law, with many calling for a morator...
متن کاملDirty Bombs: The Threat Revisited
On March 6 of the same year, the Senate Foreign Relations Committee held a hearing on the question of radiological dispersion devices (RDDs), the technical term for dirty bombs, and their ability to cause casualties and damage. At that hearing, experts from inside and outside government testified that, while an RDD could cause economic harm, it was unlikely to cause deaths or injuries beyond th...
متن کاملSpectral Analysis of Ellerman Bombs
By use of the high-resolution spectral data obtained with THEMIS on 2002 September 5, the characteristics of 14 well-observed Ellerman bombs (EBs) have been analyzed. Our results indicate that 9 of the 14 EBs are located near the longitudinal magnetic polarity inversion lines. Most of the EBs are accompanied by mass motions. The most obvious characteristic of the EB spectra is the two emission ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Science
سال: 2013
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.339.6117.253-c