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October 3, 2011 - Volume 89, Number 40
- p. 35
Science & Technology Concentrates
More Science & Technology Concentrates
- Protein Signaling In Motion
- Mass spectrometry uncovers a crucial tugging action involved in G protein activation
- Silanediols Debut As New Catalyst Class
- Hydrogen bond donor compounds join other metal-free catalysts in the organic synthesis tool box
- Millipede Glow Deters Would-Be Predators
- For the first time, field tests show bioluminescence can function as a warning signal
- Nanostructures Sop Up Radioactive Ions
- Tiny titanate tubes and fibers could remediate contaminated water
- Sour-To-Sweet Miracle Mechanism Revealed
- Japanese researchers learn how African red berry’s glycoprotein alters human taste
- Hybrid Photocatalyst Produces H2Rapidly
- Coupling photosystem I and a cobalt complex yields an inexpensive yet active catalyst
- Enantiomeric Effects Of Pain Drugs Unfold
- Arctic Ozone Loss Qualifies As A Hole
- Ozone depletion in the stratosphere over the Arctic deepens, matching that of the Antarctic
Topics Covered
More Science Stories
October 24, 2011
Bryostatins Retain Promise
(October 24, 2011 | Vol. 89 Issue 43 | pp. 10-17)New results in total synthesis reinvigorate a 40-year-old field of research.
For Cave's Art, An Uncertain Future
(October 24, 2011 | Vol. 89 Issue 43 | pp. 38-40)Disagreement on conservation course of action complicates a potential reopening.
Cancer Stem Cells
(October 24, 2011 | Vol. 89 Issue 43 | pp. 41-43)Researchers zero in on the pathways that allow cancer to bounce back after treatment.
What's That Stuff? Blue Jeans
(October 24, 2011 | Vol. 89 Issue 43 | p. 44)Making the iconic pants requires both color-addition and color-removal chemistry.
Shedding Nanoparticles
(October 24, 2011 | Vol. 89 Issue 43 | p. 5)Materials Science: Chemists observe metal objects sloughing off ions to form nanoparticles.
Modifying Messenger RNA
(October 24, 2011 | Vol. 89 Issue 43 | p. 7)Chemical Biology: Methylated bases in mRNA may have roles in gene regulation and obesity.
Lab-On-A-Chip For Planets, Moons
(October 24, 2011 | Vol. 89 Issue 43 | p. 8)Microfluidics: Automated chip is designed to detect extraterrestrial amino acids.
New Editor For Analytical Chemistry
(October 24, 2011 | Vol. 89 Issue 43 | p. 9)Publishing: Jonathan Sweedler to take the helm.
Science & Technology Concentrates
(October 24, 2011 | Vol. 89 Issue 43 | p. 37)
October 17, 2011
Improving Shop Safety
(October 17, 2011 | Vol. 89 Issue 42 | pp. 56-57)Yale updates policies on machine shop use after student death.
Cleaning Acrylics
(October 17, 2011 | Vol. 89 Issue 42 | pp. 58-59)Conservation scientists seek new ways to keep modern paintings looking their best.
Detecting H2S In Vivo (Member Content)
(October 17, 2011 | Vol. 89 Issue 42 | p. 60)Studies could lead to sensitive and selective analyses for tiny signaling agent.
Rules For Design
(October 17, 2011 | Vol. 89 Issue 42 | p. 9)Materials Science: Guidelines predict structures formed by nanoparticles and DNA linkers.
Identifying Modified Cells
(October 17, 2011 | Vol. 89 Issue 42 | p. 11)Molecular Biology: Technique tags and enriches cells genetically altered by nucleases.
Linker-Free Molecular Wires
(October 17, 2011 | Vol. 89 Issue 42 | p. 12)Electronics: Metal-carbon bonds increase electrical conductance.
Asymmetry From A Guest
(October 17, 2011 | Vol. 89 Issue 42 | p. 13)Stereochemistry: Enzymelike pocket that hosts chiral species controls catalyst's enantioselectivity.
Science & Technology Concentrates
(October 17, 2011 | Vol. 89 Issue 42 | pp. 54-56)
Courtesy of Gloria Manney
2011 Arctic ozone loss (top, gray) is comparable to that lost in the Antarctic in some years.
For the first time, seasonal ozone loss in the stratosphere over the Arctic qualifies as a full-blown “ozone hole.” Although winter-spring ozone holes over the Antarctic, associated with extreme cold and chlorofluorocarbons and other ozone-depleting chemicals, have been documented since the 1980s, ozone loss over the milder Arctic had been far less dramatic. An international team led by Gloria L. Manney at NASA’s Jet Propulsion Laboratory now shows that in 2011 the amount of ozone loss in the Arctic was comparable to that in some early Antarctic ozone holes. (Nature, DOI: 10.1038/nature10556). The cause, they believe, stems from an unusually lengthy cold period—conditions that promote formation of stratospheric clouds, providing surfaces on which reactions that convert chlorine into ozone-destroying species such as ClO take place. The researchers comment that atmospheric behavior in the Arctic is still poorly understood, and thus scientists are unable to predict if or when another major ozone loss will occur there.
- Chemical & Engineering News
- ISSN 0009-2347
- Copyright © 2011 American Chemical Society
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