Results 31 to 40 of about 323,219 (285)

The diffusion-induced nova scenario. CK Vul and PB 8 as possible observational counterparts [PDF]

, 2011
We propose a scenario for the formation of DA white dwarfs with very thin helium buffers. For these stars we explore the possible occurrence of diffusion-induced CNO- flashes, during their early cooling stage. In order to obtain very thin helium buffers,
Althaus, Althaus, Althaus, Althaus, C. Olano, Castanheira, Clayton, De Marco, Duerbeck, Duerbeck, D’Antona, Evans, Flower, García-Berro, García-Rojas, Guandalini, Hajduk, Hansen, Harrison, Herwig, Herwig, Iben, Iben, Iben, Iben, Kalirai, Karakas, Karakas, Kato, Kimeswenger, Koester, L. G. Althaus, Lawlor, M. M. Miller Bertolami, Mazzitelli, Miller, Miller, Miller, Miller, N. Jiménez, Natta, Renedo, Salaris, Salaris, Schröder, Shara, Shara, Todt, Trimble, Vassiliadis, Werner, Wilcots, Yoon   +52 more
core   +3 more sources

Flaxseed Oil Testing to Determine its Suitability as an Alternative to Transformer Oil [PDF]

E3S Web of Conferences
This study aims to assess the feasibility of using flaxseed oil as an alternative to transformer oil. Petroleum, a non-renewable resource with a negative environmental impact, is the basis of the transformer oil currently in use.
Romadhona Gema, Ismara Ketut Ima, Nugraheni Mutiara, Sukarman Irwan Sukma   +3 more
doaj   +1 more source

Generation of Frenkel defects above the Debye temperature by proliferation of phonons near the Brillouin zone edge

New Journal of Physics, 2018
A novel, non-radiative mechanism is reported by which Frenkel pairs of vacancies and interstitials are generated in molar concentrations far above thermal equilibrium.
M Jongmanns, R Raj, D E Wolf
doaj   +1 more source

Production of modified bitumen from used engine oil, coal tar and waste tyre for construction applications

South African Journal of Chemical Engineering, 2020
Bitumen plays an important role especially in the community in terms of infrastructure where its properties are utilized. It is a semi-solid hydrocarbon product which is produced by removing the lighter fractions such as liquid petroleum gas from heavy ...
Nyaradzo Kamoto, Joseph Govha, Gwiranai Danha, Tirivaviri Mamvura, Edison Muzenda   +4 more
doaj   +1 more source

Fast Magnetic Twister and Plasma Perturbations in a 3-D Coronal Arcade

, 2014
We present results of 3-D numerical simulations of a fast magnetic twister excited above a foot-point of the potential solar coronal arcade that is embedded in the solar atmosphere with the initial VAL-IIIC temperature profile, which is smoothly extended
Murawski, K., Musielak, Z. E., Srivastava, A. K.   +2 more
core   +1 more source

Experimental Study of Thermal Properties and Dynamic Viscosity of Graphene Oxide/Oil Nano-Lubricant

Energies, 2021
This experimental study was carried out based on the nanotechnology approach to enhance the efficacy of engine oil. Atomic and surface structures of graphene oxide (GO) nanoparticles were investigated by using a field emission scanning electron ...
Ramin Ranjbarzadeh, Raoudha Chaabane
doaj   +1 more source

The Effect of Off-Spec Canola Biodiesel Blending on Fuel Properties for Cold Weather Applications

ChemEngineering, 2018
Biodiesel is a renewable and reduced-emission alternative fuel produced mainly from the alcoholysis of vegetable oils and/or animal fats. It is mainly used in blends with diesel fuel to reduce emissions, enhance lubrication and lower sulfur content ...
Ubaid Hassan, Isam Al-Zubaidi, Hussameldin Ibrahim   +2 more
doaj   +1 more source

Real‐time assay of ribonucleotide reductase activity with a fluorescent RNA aptamer

FEBS Letters, EarlyView.
Ribonucleotide reductases (RNR) synthesize DNA building blocks de novo, making them crucial in DNA replication and drug targeting. FLARE introduces the first single‐tube real‐time coupled RNR assay, which enables isothermal tracking of RNR activity at nanomolar enzyme levels and allows the reconstruction of allosteric regulatory patterns and rapid ...
Jacopo De Capitani, Noemi E. Nwosu, Viktoria Gocke, Müge Kasanmascheff, Hannes Mutschler   +4 more
wiley   +1 more source

Flash Point and Chemical Composition of Aviation Kerosene (Jet A) [PDF]

, 2000
The relationship between chemical composition, flash point, and ignition energy was examined for eight samples of aviation kerosene (Jet A) with flash points between 29°C (84°F) and 74°C (165°F).
Lee, J. J., Nuyt, C. D., Shepherd, J. E., Woodrow, J. E.   +3 more
core  

Flatness of the setting Sun [PDF]

, 2002
Atmospheric refraction is responsible for the bending of light-rays in the atmosphere. It is a result of the continuous decrease in the refractive index of the air as a function of altitude.
Györi L., S. Volkán-Kacsó, Thomas M. E., Z. Néda   +3 more
core   +2 more sources