Results 21 to 30 of about 40,291 (312)

Large-Eddy Simulation of combustion instabilities in a variable-length combustor. [PDF]

open access: yes, 2013
This article presents a simulation of a model rocket combustor with continuously variable acoustic properties thanks to a variable-length injector tube. Fully compressible Large-Eddy Simulations are conducted using the AVBP code.
Garby, Romain   +2 more
core   +3 more sources

OXIDATION OF DISPERSE CARBON MATERIALS

open access: yesТонкие химические технологии, 2018
It is proposed to consider the process of carbon materials oxidative activation from the positions of topochemical reactions involving chemisorption of the activating agent (oxidizer) on the material surface active centers followed by chemical ...
V. H. Nguyen   +3 more
doaj   +1 more source

Organic superbase-mediated synthesis of borohydride ionic liquids as novel composite hypergolic fuels

open access: yesEnergetic Materials Frontiers, 2023
This study prepared a series of novel hypergolic fluids based on borohydride ionic liquids and organic superbase using an in situ synthetic method. In these hypergolic fluids, ionic liquids in 1,5-diazabicyclo[4.3.0]non-5-ene (DBN) and 1,8-diazabicyclo[5.
Zhi Wang   +4 more
doaj   +1 more source

Cost Estimation Model Presentation for Cryogenic/Semi-Crogenic Space Propulsion Systems [PDF]

open access: yesفصلنامه علوم و فناوری فضایی, 2021
The purpose of this paper is to present the cost estimation model for Cryogenic/Semi-Crogenic space propulsion systems. Therefore, the space propulsion system selection from fuel and oxidizer type aspect and achieving the maximum performance and minimum ...
Mostafa Jafarpanah, Hassan Naseh
doaj   +1 more source

Experimental Investigation of the Continuous Transition of Flame-Spreading near the Blow-Off Limit

open access: yesJournal of Combustion, 2020
This study investigates the continuous transition from flame-spreading to stabilized combustion near the blow-off limit in opposed forced flow by using expanding solid fuel duct that makes distribution of oxidizer velocity in the axial direction.
K. Komizu, Y. Saito, A. Tsuji, H. Nagata
doaj   +1 more source

Oxidative stress: oxidants and antioxidants [PDF]

open access: yesExperimental Physiology, 1997
An imbalance between oxidants and antioxidants in favour of the oxidants, potentially leading to damage, is termed ‘oxidative stress’. Oxidants are formed as a normal product of aerobic metabolism but can be produced at elevated rates under pathophysiological conditions. Antioxidant defense involves several strategies, both enzymatic and non‐enzymatic.
openaire   +2 more sources

Oxidative Stress, Nitric Oxide, and Diabetes [PDF]

open access: yesThe Review of Diabetic Studies, 2010
In the recent decades, oxidative stress has become focus of interest in most biomedical disciplines and many types of clinical research. Increasing evidence from research on several diseases show that oxidative stress is associated with the pathogenesis of diabetes, obesity, cancer, ageing, inflammation, neurodegenerative disorders, hypertension ...
Pitocco, Dario   +6 more
openaire   +3 more sources

Estimating energy release performance of oxidizer-activated aluminum fuel particles under ultrafast stimulus

open access: yesDefence Technology, 2023
Aluminum (Al) particles are good fuel additives to improve the energy output performances of explosives. Under detonation environment, reaction delay of Al particles plays a key role in the energy release efficiency.
Ya-ru Li   +4 more
doaj   +1 more source

Oxidative Shielding or Oxidative Stress? [PDF]

open access: yesThe Journal of Pharmacology and Experimental Therapeutics, 2012
In this review I report evidence that the mainstream field of oxidative damage biology has been running fast in the wrong direction for more than 50 years. Reactive oxygen species (ROS) and chronic oxidative changes in membrane lipids and proteins found in many chronic diseases are not the result of accidental damage.
openaire   +2 more sources

Oxidation mechanism of perfluorooctanoic acid-functionalized aluminum metastable intermolecular composites regulated by Preignition reactions interface fuel-oxidizer ratio

open access: yesMaterials & Design, 2023
PFOA-functionalized Al Metastable Intermolecular Composites (MICs) refer to the system using aluminum nanoparticles as fuel and PFOA as oxidant. Aluminum is the most widely used metal fuel in energetic materials.
Tianqi Li   +3 more
doaj   +1 more source

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