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Effect of chemical composition on the fracture toughness of bulk metallic glasses
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Quantifying the Chemical Composition and Real-Time Mass Loading of Nanoplastic Particles in the Atmosphere Using Aerosol Mass Spectrometry
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NEXAFS imaging to characterize the physio-chemical composition of cuticle from African Flower Scarab Eudicella gralli
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Assessing the roles of synthesis method and chemical composition in determining structure–property correlations in alloyed, ultrathin nanowire motifs for the methanol oxidation reaction
Using microscopy and spectroscopy to assess ultrathin nanowire structure.
Effects of chemical composition and physicochemical properties of poplar biomass on the performance of 3D printed poplar-reinforced PLA materials
Lignocellulosic biomass has been well-acknowledged as a filler for making 3D printed composites. The technical performances of composites were influenced by the characteristics of the components. The correlations between poplar biomass properties and the mechanical and thermal performances of the 3D printed poplar-plastic composites were investigated. The characteristics of poplar were modified by different pretreatment methods, including using hot water, dilute acid, and organic solvent (organosolv), and each treated poplar biomass was applied as a filler in a polylactic acid (PLA) polymer matrix to produce eco-friendly materials. These solvent pretreatments increased the hydrophobicity and surface area of poplar. Organosolv treated poplar showed the highest cellulose content and significantly increased Young's modulus of its biocomposites. Principal component analysis revealed that the specific surface area and water contact angle of biomass contributed to the thermal stability of biocomposites. Additionally, the degree of polymerization of cellulose and xylan content within the biomass correlated with the biocomposites' break stress. Notably, the crystallinity of biocomposites impacted the modulus of these materials. The reported relationships between biomass characteristics and 3D printed composite behaviors provide guidance for optimizing biomass processing in biocomposite applications.
New Insights into the Chemical Composition of Five Oort Cloud Comets after Re-analysis of Their Infrared Spectra
We present revised results for the main molecular species in five Oort Cloud comets observed with near-infrared echelle grating spectrometer (NIRSPEC) at the Keck Observatory between 1999 and 2012 (C/1999 S4 (LINEAR), C/2001 A2 (LINEAR), C/2007 W1 (Boattini), C/2012 F6 (Lemmon), and C/2012 S1 (ISON)). The re-evaluation of these data shows the improvement of results in some of the data sets, in particular for comets observed and analyzed before the advent of new and revised fluorescence models and terrestrial retrieval methods introduced since 2011. We observe significant improvements in the resulting rotational temperatures and the production rates for all species, and in mixing ratios of minor species (relative to water). The re-analysis also allowed us to quantify species not analyzed previously, mostly due to the lack of molecular models (e.g., ammonia and formaldehyde). We note, however, that the improvement of these revised values is less substantial for comets observed (and/or analyzed) since 2010.
Chemical Composition of Outbursting Comet C/2015 ER61 (PanSTARRS)
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The R -Process Alliance: detailed chemical composition of an r -process enhanced star with UV and optical spectroscopy
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JUPITER- CHEMICAL COMPOSITION, STRUCTURE, AND ORIGIN OF A GIANT PLANET
Data relating to composition and structure of atmosphere and interior of jupiter
JUPITER- CHEMICAL COMPOSITION, STRUCTURE, AND ORIGIN OF A GIANT PLANET
Data relating to composition and structure of atmosphere and interior of jupiter
On the variation of the microturbulence parameter with chemical composition
Stellar model atmosphere abundance analysis to correlate microturbulent velocity parameters with iron to hydrogen ratio for G dwarfs
The chemical composition of cosmic rays in the energy range 70-240 Mev/nucleon in 1966.
He 3 and 4 differential energy spectra and upper limits on primary deuteron flux obtained from balloon sounding for 70-240 Mev/nucleon
On the variation of the microturbulence parameter with chemical composition.
Microturbulent velocity parameter correlation to iron-to-hydrogen ratio for G dwarfs, using model atmosphere abundance analyses