Studying phages, viruses that infect bacteria, can help researchers to better understand how portions of the world’s oceans function without oxygen.
Though small, viruses could hold the secrets of how vast portions of the world’s oceans function without oxygen.
University of Arizona undergraduate researcher Sarah Schwenck and postdoctoral associate Jennifer Brum are conducting a research project in the Tucson Marine Phage Lab, which is headed by assistant professor of ecology and evolutionary biology Matthew Sullivan. (more…)
Die erste Meereschutzkonferenz nach Rio+20 ist vorbei. Und das Schiff scheint Segel gesetzt zu haben, zwar langsam und gehemmt von eisigem Gegenwind, aber es ist in See gestochen. Zu diesem Ergebnis kommt das Bündnis „High Seas Alliance“ (HSA), an dem sich neben anderen Meeresschutzorganisationen auch Greenpeace beteiligt.
Im Zentrum der Verhandlungen stand ein neues Durchführungsabkommen im Sinne des Seerechtsübereinkommens der Vereinten Nationen (SRÜ). Dieses erhielt von vielen Staaten starke Unterstützung, darunter die G77 und China, die Europäische Union, Australien, Mexico und Neuseeland. Trotzdem verlangsamten die Blockadeversuche einer kleinen Minderheit dieses Prozess deutlich. (more…)
COLUMBIA, Mo. — CEOs need to demonstrate strong leadership and good decision-making skills, but CEOs with over-confidence can involve their companies in riskier ventures and put investors’ funds at risk, according to a new study from the University of Missouri, Georgia Tech University and the University of Texas-Arlington.
“Over-confident CEOs feel they have superior decision-making abilities and are more capable than their peers,” said Stephen Ferris, professor of finance in the MU Trulaske College of Business. “Unfortunately, they tend to make decisions about mergers or acquisitions that can be viewed as risky. For example, CEOs who are over-confident tend to target companies that do not focus on their core line of business. Generally speaking, mergers that diversify companies don’t work.” (more…)
Microcredit generally benefits borrowers, according to new research focused on Mexico’s biggest for-profit microlender — but it’s not lifting people out of poverty.
In a multi-year, randomized evaluation of microloans provided by Compartamos Banco, Yale University economist Dean Karlan, with collaborators Manuela Angelucci of the University of Michigan and Jonathan Zinman of Dartmouth College, show there are generally positive effects on average and find little evidence that some borrowers end up worse off while others end up better off. However, the canonical story that microcredit leads to higher enterprise income did not bear fruit. (more…)
A new look at conditions after a Manhattan-sized asteroid slammed into a region of Mexico in the dinosaur days indicates the event could have triggered a global firestorm that would have burned every twig, bush and tree on Earth and led to the extinction of 80 percent of all Earth’s species, says a new University of Colorado Boulder study.
Led by Douglas Robertson of the Cooperative Institute for Research in Environmental Sciences, or CIRES, the team used models that show the collision would have vaporized huge amounts of rock that were then blown high above Earth’s atmosphere. The re-entering ejected material would have heated the upper atmosphere enough to glow red for several hours at roughly 2,700 degrees Fahrenheit — about the temperature of an oven broiler element — killing every living thing not sheltered underground or underwater. (more…)
Billions of trees killed in the wake of mountain pine beetle infestations, ranging from Mexico to Alaska, have not resulted in a large spike in carbon dioxide released into the atmosphere, contrary to predictions, a UA-led study has found.
Massive tree die-offs release less carbon into the atmosphere than previously thought, new research led by the University of Arizona suggests.
Across the world, trees are dying in increasing numbers, most likely in the wake of a climate changing toward drier and warmer conditions, scientists suspect. In western North America, outbreaks of mountain pine beetles (Dendroctonus ponderosae) have killed billions of trees from Mexico to Alaska over the last decade. (more…)
The Isabella anomaly — indications of a large mass of cool, dehydrated material about 100 kilometers beneath central California — is in fact a surviving slab of the Farallon oceanic plate. Most of the Farallon plate was driven deep into the Earth’s mantle as the Pacific and North American plates began converging about 100 million years ago, eventually coming together to form the San Andreas fault.
PROVIDENCE, R.I. [Brown University] — Large chunks of an ancient tectonic plate that slid under North America millions of years ago are still present under parts of central California and Mexico, according to new research led by Brown University geophysicists. (more…)
New Microsoft-commissioned study also highlights dangers for those that use counterfeit software.
REDMOND, Wash. — Although some computer users may actively seek pirated software in hopes of saving money, the chances of infection by unexpected malware are one in three for consumers and three in 10 for businesses, according to a new study commissioned by Microsoft Corp. and conducted by IDC. As a result of these infections, the research shows that consumers will spend 1.5 billion hours and US$22 billion identifying, repairing and recovering from the impact of malware, while global enterprises will spend US$114 billion to deal with the impact of a malware-induced cyberattack.
The global study analyzed 270 websites and peer-to-peer networks, 108 software downloads, and 155 CDs or DVDs, and it interviewed 2,077 consumers and 258 IT managers or chief information officers in Brazil, China, Germany, India, Mexico, Poland, Russia, Thailand, the United Kingdom and the United States. Researchers found that of counterfeit software that does not come with the computer, 45 percent comes from the Internet, and 78 percent of this software downloaded from websites or peer-to-peer networks included some type of spyware, while 36 percent contained Trojans and adware. (more…)
