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20 Aktuelle Fachpublikationen zum Thema Addition

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[Report] An arboreal docodont from the Jurassic and mammaliaform ecological diversification

13.02.2015 | Qing-Jin Meng; Qiang Ji; Yu-Guang Zhang; Di Liu; David M. Grossnickle; Zhe-Xi Luo, Science , 2015

A new docodontan mammaliaform from the Middle Jurassic of China has skeletal features for climbing and dental characters indicative of an omnivorous diet that included plant sap. This fossil expands the range of known locomotor adaptations in docodontans to include climbing, in addition to ...

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[Report] Direct observation and kinetics of a hydroperoxyalkyl radical (QOOH)

06.02.2015 | John D. Savee; Ewa Papajak; Brandon Rotavera; Haifeng Huang; Arkke J. Eskola; Oliver Welz; Leonid Sheps; Craig A. Ta ..., Science , 2015

Oxidation of organic compounds in combustion and in Earth’s troposphere is mediated by reactive species formed by the addition of molecular oxygen (O2) to organic radicals. Among the most crucial and elusive of these intermediates are hydroperoxyalkyl radicals, often denoted “QOOH.” These species ...

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[Report] Origin of dramatic oxygen solute strengthening effect in titanium

06.02.2015 | Qian Yu; Liang Qi; Tomohito Tsuru; Rachel Traylor; David Rugg; J. W. Morris Jr.; Mark Asta; D. C. Chrzan; Andrew M. ..., Science , 2015

Structural alloys are often strengthened through the addition of solute atoms. However, given that solute atoms interact weakly with the elastic fields of screw dislocations, it has long been accepted that solution hardening is only marginally effective in materials with mobile screw ...

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[Perspective] Taking temperature at the nanoscale

06.02.2015 | Christian Colliex, Science , 2015

Measuring temperature has become commonplace since Fahrenheit, Celsius, and others introduced thermometers and temperature scales in the 18th century. However, the definition of temperature is not at all obvious, as it is now described as a statistical quantity given by the rate of change of ...

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[In Depth] Seafloor grooves record the beat of the ice ages

06.02.2015 | Eric Hand, Science , 2015

In addition to carving up the continents, the ice ages also tattoo the sea floor with rhythmic patterns, according to two studies published this week. At seafloor spreading centers, plates of ocean crust diverge and magma erupts in the gap, building new crust onto the plates' trailing edges. ...

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[Report] Composition-matched molecular “solders” for semiconductors

23.01.2015 | Dmitriy S. Dolzhnikov; Hao Zhang; Jaeyoung Jang; Jae Sung Son; Matthew G. Panthani; Tomohiro Shibata; Soma Chattopad ..., Science , 2015

We propose a general strategy to synthesize largely unexplored soluble chalcogenidometallates of cadmium, lead, and bismuth. These compounds can be used as “solders” for semiconductors widely used in photovoltaics and thermoelectrics. The addition of solder helped to bond crystal surfaces and ...

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[Feature] Runners-up

19.12.2014 | Science , 2014

In addition to its Breakthrough of the Year, Science named nine runners-up as significant scientific achievements of 2014.

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[Feature] Areas to watch in 2015

19.12.2014 | Science , 2014

Science is a moving target. In addition to looking back on achievements of the previous year, the Breakthrough staff also hazards a few informed guesses about developments likely to make news in months to come.

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[Special Issue Review] The melanoma revolution: From UV carcinogenesis to a new era in therapeutics

21.11.2014 | Jennifer A. Lo; David E. Fisher, Science , 2014

Melanoma, the deadliest form of skin cancer, is an aggressive disease that is rising in incidence. Although melanoma is a historically treatment-resistant malignancy, in recent years unprecedented breakthroughs in targeted therapies and immunotherapies have revolutionized the standard of care for ...

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[Special Issue Review] Antibodies in HIV-1 Vaccine Development and Therapy

13.09.2013 | Florian Klein; Hugo Mouquet; Pia Dosenovic; Johannes F. Scheid; Louise Scharf; Michel C. Nussenzweig, Science , 2013

Despite 30 years of study, there is no HIV-1 vaccine and, until recently, there was little hope for a protective immunization. Renewed optimism in this area of research comes in part from the results of a recent vaccine trial and the use of single-cell antibody-cloning techniques that uncovered ...

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