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Alexander von Humboldt

Alexander von Humboldt

A Brief History of Medical Face Masks

If you happened to find yourself in 17th-century Naples, you were in for a rough time. The Plague of 1656 was in full swing and would claim an estimated 300,000 lives in Naples alone. If you were one of the unlucky souls to come down with the buboes and high…
bubmag
May 29, 2020
Alexander von Humboldt

Cross causes controversy atop reconstructed Berlin Palace

The hoisting of a Christianised dome to top off Berlin's rebuilt imperial palace-turned-museum complex has run into controversy. Critics say Germany is missing a chance to portray post-colonial multicultural diversity. Berlin wind-conditions permitting, a crane was due Friday to host the 17-ton dome reminiscent of Prussian imperialism to top off…
bubmag
May 29, 2020
Alexander von Humboldt

A Phosphinine‐Derived 1‐Phospha‐7‐Bora‐Norbornadiene: Frustrated Lewis Pair Type Activation of Triple Bonds

Abstract Salt metathesis of 1‐methyl‐2,4,6‐triphenylphosphacyclohexadienyl lithium and chlorobis(pentafluorophenyl)borane affords a 1‐phospha‐7‐bora‐norbornadiene derivative 2 . The C≡N triple bonds of nitriles insert into the P−B bond of 2 with concomitant C−B bond cleavage, whereas the C≡C bonds of phenylacetylenes react with 2 to form λ4‐phosphabarrelenes. Even though 2 must formally be…
bubmag
May 29, 2020
Alexander von Humboldt

‘Black nitrogen’

IMAGE: Dr. Dominique Laniel, Alexander von Humboldt Foundation research fellow, at the Bavarian Research Institute of Experimental Geochemistry & Geophysics (BGI). view more  Credit: Photo: Christian Wißler. In the periodic table of elements there is one golden rule for carbon, oxygen, and other light elements. Under high pressures they have similar…
bubmag
May 29, 2020
Alexander von Humboldt

Jean Louis Rodolphe Agassiz (1807)

This article is about the Swiss-American biologist and geologist. For the American ornithologist, illustrator and artist, see Louis Agassiz Fuertes. Louis Agassiz Born May 28, 1807Haut-Vully, Switzerland Died December 14, 1873 (aged 66)Cambridge, Massachusetts Citizenship United States Fields Paleontology Glaciology Geology Natural history Institutions University of NeuchâtelHarvard UniversityCornell University Alma mater…
bubmag
May 28, 2020
Alexander von Humboldt

[ASAP] Self-Healing Dyes—Keeping the Promise?

Fluorescence microscopy, including single-molecule and super-resolution imaging, has evolved as a powerful tool to study the structure and dynamics of biological systems in vitro and in vivo down to the molecular level. A greatly improved performance of the contrast agents—fluorescent dyes and proteins—is achieved via suppression of undesired long-lived and…
bubmag
May 28, 2020
Alexander von Humboldt

New clues to deep earthquake mystery

A new understanding of our planet's deepest earthquakes could help unravel one of the most mysterious geophysical processes on Earth. Deep earthquakes -- those at least 300 kilometers below the surface -- don't typically cause damage, but they are often widely felt. These earthquakes can provide vital clues to understanding…
bubmag
May 27, 2020
Alexander von Humboldt

New clues to deep earthquake mystery

Credit: CC0 Public Domain A new understanding of our planet's deepest earthquakes could help unravel one of the most mysterious geophysical processes on Earth. Deep earthquakes—those at least 300 kilometers below the surface—don't typically cause damage, but they are often widely felt. These earthquakes can provide vital clues to understanding…
bubmag
May 27, 2020
Alexander von Humboldt

New clues to deep earthquake mystery

A new understanding of our planet's deepest earthquakes could help unravel one of the most mysterious geophysical processes on Earth. Deep earthquakes -- those at least 300 kilometers below the surface -- don't typically cause damage, but they are often widely felt. These earthquakes can provide vital clues to understanding…
bubmag
May 27, 2020