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March 24, 2017

Science

[Distant Galaxies] Identifying the hosts of quasar absorbers

If the line of sight from Earth to a distant quasar passes through foreground material, some of the quasar's light is absorbed. If a galaxy-sized quantity of gas intervenes, it forms – [Read More]

by Keith T. Smith at March 24, 2017 12:00 AM

[Cell Signaling] Cell projections set up pigment pattern

Macrophages eliminate dead or dying cells and identify and destroy invading microbes. However, they also exhibit nonimmune functions in development and homeostasis. Eom and Parichy – [Read More]

by Beverly A. Purnell at March 24, 2017 12:00 AM

[Metallurgy] Nanograined metals avoid going soft

The Hall-Petch relationship links a metal's increasing hardness with decreasing grain size, but it breaks down when grains become very small. This is unfortunate because nanograined – [Read More]

by Brent Grocholski at March 24, 2017 12:00 AM

[Catalysis] Metal-oxide synergy

The hydrogenation of carbon dioxide is a key step in the industrial production of methanol. Catalysts made from copper (Cu) and zinc oxide (ZnO) on alumina supports are often used. – [Read More]

by Phil Szuromi at March 24, 2017 12:00 AM

[Psychology] Using “you” to generalize from me to others

Sometimes “you” is used when addressing another person, but in many situations, “you” is used to indicate anyone or everyone—the generic “you.” Orvell et al. studied the u – [Read More]

by Gilbert Chin at March 24, 2017 12:00 AM

[Dengue Virus] Estimating transmission chains for dengue

Dengue virus (DENV) causes a large number of asymptomatic infections, so surveillance captures only a fraction of cases. Salje et al. developed a method for identifying the – [Read More]

by Caroline Ash at March 24, 2017 12:00 AM

[Immunological Memory] Helping T cells feel at home in the liver

Liver-resident T cells defend against infections such as malaria and hepatitis B virus. McNamara et al. found that liverresident CD8+ T cells up-regulate LFA-1 and – [Read More]

by Angela Colmone at March 24, 2017 12:00 AM

[Neuroscience] Why pain and stress lead to depression

Chronic stress or pain is associated with the development of depression. Descalzi et al. examined gene expression changes in the brain in mouse models of nerve injury–or c – [Read More]

by Leslie K. Ferrarelli at March 24, 2017 12:00 AM

[Cancer Etiology] Cancer and the unavoidable R factor

Most textbooks attribute cancer-causing mutations to two major sources: inherited and environmental factors. A recent study highlighted the prominent role in cancer of replicative (R) – [Read More]

by Paula A. Kiberstis at March 24, 2017 12:00 AM

[Volcanology] Making magma chambers from mush

Shallow magma chambers either erupt as volcanoes or solidify as intrusive magma bodies. These magma bodies are traditionally considered to be long-lived and dominated by melt. Cashman – [Read More]

by Brent Grocholski at March 24, 2017 12:00 AM