Results 21 to 30 of about 869 (133)

Photometry of active Centaurs: Colors of dormant active Centaur nuclei [PDF]

open access: yes, 2019
We present multiband photometric observations of nine Centaurs. Five of the targets are known active Centaurs (167P/CINEOS, 174P/Echeclus, P/2008 CL94, P/2011 S1, and C/2012 Q1), and the other four are inactive Centaurs belonging to the redder of the two
Brown, Michael E.   +2 more
core   +3 more sources

Proterozoic to Quaternary Events of Fracture Mineralisation and Oxidation in SE Sweden [PDF]

open access: yes, 2008
Fracture minerals and altered wall rock have been analysed to reveal the low-temperature evolution, especially regarding redox conditions, of the Simpevarp area, SE Sweden.
Drake, Henrik
core   +1 more source

Comparison of Three Sequential Extraction Methods for the Determination of Iron, Manganese, and Thallium in Asphaltite Samples [PDF]

open access: yes, 2020
Asphaltite, which is based on petroleum, contains many elements that exist in different forms. In this study, the BCR sequential extraction (BCRSE), Tessier sequential extraction (TSE) and Stover sequential extraction (SSE) procedures were applied for ...
Aydın, Fırat   +3 more
core   +2 more sources

Near-Infrared Mapping and Physical Properties of the Dwarf-Planet Ceres [PDF]

open access: yes, 2007
We study the physical characteristics (shape, dimensions, spin axis direction, albedo maps, mineralogy) of the dwarf-planet Ceres based on high-angular resolution near-infrared observations.
A'Hearn   +50 more
core   +4 more sources

Thermogravimetric and kinetic analysis of energy crop Jerusalem artichoke using the distributed activation energy model [PDF]

open access: yes, 2013
Jerusalem artichoke has great potential as future feedstock for bioenergy production because of its high tuber yield (up to 90 t ha(-1)), appropriate biomass characteristics, low input demand, and positive environmental impact.
Li, Lili   +4 more
core   +1 more source

Preparation of Stabilized Fiber from Avgamasya Asphaltite

open access: yesEnergy & Fuels, 1999
This paper describes different procedures applied for the preparation of stabilized fibers from Avgamasya asphaltite products. Three different methods of solvent extraction, vacuum distillation of fluidized bed pyrolysis tar, and air blowing of the vacuum distilled products were used in this study.
Hadi A. El Akrami   +2 more
  +5 more sources

Взаимосвязь удельного показателя поглощения нефтей, природных битумов и их компонентов в видимой области спектра с параметрами их состава [PDF]

open access: yes, 2003
Актуальность работы обусловлена необходимостью экспрессной оценки группового состава нефтей, их некоторых физико-химических и технологических свойств, в том числе для контроля над разработкой нефтяных месторождений.
Diedrich, Klaus   +4 more
core   +1 more source

THERMAL BEHAVIOR AND PYROLYSIS OF AVGAMASYA ASPHALTITE [PDF]

open access: yesOil Shale, 2021
Y. Tonbul, A. Saydut
doaj   +1 more source

The Surface of 2003 EL_(61) in the Near-Infrared [PDF]

open access: yes, 2007
We report the detection of crystalline water ice on the surface of 2003 EL_(61). Reflectance spectra were collected from the Gemini North telescope in the 1.0 to 2.4 μm wavelength range and from the Keck telescope across the 1.4-2.4 μm wavelength range ...
Barkume, Kristina   +4 more
core  

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