Results 1 to 10 of about 4,234,454 (416)
Ionized Nitrogen Mono-hydride Bands are Identified in the Pre-solar and Carbonado Diamond Spectra [PDF]
Meteoritics & Planetary Science 47, 1-7 (2012), 2010 None of the well established Nitrogen related IR absorption bands, common in synthetic and terrestrial diamonds, have been identified in the pre-solar diamond spectra. In the carbonado diamond spectra only the single nitrogen impurity (C centre) is identified and the assignments of the rest of the nitrogen-related bands are still debated.
Adams +33 more
arxiv +3 more sources
EarthN: A new Earth System Nitrogen Model [PDF]
, 2018 The amount of nitrogen in the atmosphere, oceans, crust, and mantle have important ramifications for Earth's biologic and geologic history. Despite this importance, the history and cycling of nitrogen in the Earth system is poorly constrained over time.
Condie K. C. +8 more
arxiv +5 more sources
A secular increase in continental crust nitrogen during the Precambrian [PDF]
Geochem. Persp. Let. (2017) 4, 24-28, 2017 Recent work indicates the presence of substantial geologic nitrogen reservoirs in the mantle and continental crust. Importantly, this geologic nitrogen has exchanged between the atmosphere and the solid Earth over time. Changes in atmospheric nitrogen (i.e. atmospheric mass) have direct effects on climate and biological productivity. It is difficult to
Goldblatt, Colin, Johnson, Benjamin W
arxiv +5 more sources
Chemical Reviews, 2020 Nitrogen is ubiquitous in both natural and laboratory-grown diamond, but the number and nature of the nitrogen-containing defects can have a profound effect on the diamond material and its properties. An ever-growing fraction of the supply of diamond appearing on the world market is now lab-grown.
Michael N R Ashfold +2 more
exaly +6 more sources
Titan's past and future: 3D modeling of a pure nitrogen atmosphere and geological implications [PDF]
, 2014 Several clues indicate that Titan's atmosphere has been depleted in methane during some period of its history, possibly as recently as 0.5-1 billion years ago. It could also happen in the future. Under these conditions, the atmosphere becomes only composed of nitrogen with a range of temperature and pressure allowing liquid or solid nitrogen to ...
Charnay, Benjamin +4 more
arxiv +4 more sources
Oxygen molecule dissociation on carbon nanostructures with different types of nitrogen doping [PDF]
, 2011 Energy barrier of oxygen molecule dissociation on carbon nanotube or graphene with different types of nitrogen doping is investigated using density functional theory. The results show that the energy barriers can be reduced efficiently by all types of nitrogen doping in both carbon nanotubes and graphene.
Blochl +43 more
arxiv +3 more sources
Tracing the atomic nitrogen abundance in star-forming regions with ammonia deuteration [PDF]
, 2018 Partitioning of elemental nitrogen in star-forming regions is not well constrained. Most nitrogen is expected to be partitioned among atomic nitrogen, molecular nitrogen (N2), and icy N-bearing molecules, such as ammonia (NH3) and N2. Atomic nitrogen is not directly observable in the cold gas.
Furuya, Kenji, Persson, Magnus V.
arxiv +5 more sources
Source and sink mechanisms of nitrogen transport and use
New Phytologist, 2018 Contents Summary 35 I. Introduction 35 II. Nitrogen acquisition and assimilation 36 III. Root-to-shoot transport of nitrogen 38 IV. Nitrogen storage pools in vegetative tissues 39 V. Nitrogen transport from source leaf to sink 40 VI. Nitrogen import into
Mechthild Tegeder +1 more
exaly +2 more sources
Advanced Energy Materials, 2018 Crumpled nitrogen‐doped MXene nanosheets with strong physical and chemical coadsorption of polysulfides are synthesized by a novel one‐step approach and then utilized as a new sulfur host for lithium–sulfur batteries. The nitrogen‐doping strategy enables
Chengyin Wang, Dan Wang, Guoxiu Wang
exaly +2 more sources