Results 31 to 40 of about 39,755 (280)

Micro/Nanorobot for Drug Delivery—A Review of Material Selections

Advanced NanoBiomed Research, EarlyView.
This review explores material strategies for biomedical micro/nanorobots, emphasizing their roles in propulsion, navigation, drug delivery, and biodegradability. It highlights advancements in metallic, polymeric, and hybrid materials, while addressing clinical translation challenges such as toxicity, immune response, and manufacturability.
Xiaozhuo Wu, Bingyun Li, Malcolm Xing
wiley   +1 more source

Arrhenius Activation Energy on Viscous and Radiative Heating of Hybridized Chemical Reactive Magnetized‐Casson Nanofluid Flow in Saturated Porous Media With Varied Heat Source/Sink

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT This study analyzes the influence of Arrhenius activation energy on the chemically reactive, magnetohydrodynamic Casson hybrid nanofluid flow past an exponentially stretching surface embedded in a Darcy–Forchheimer porous medium with a non‐uniform heat source/sink.
Md. Sailanebaba, MD. Shamshuddin, S. O. Salawu   +2 more
wiley   +1 more source

Hybrid Rocket Engine Design Optimization at Politecnico di Torino: A Review

Aerospace, 2021
Optimization of Hybrid Rocket Engines at Politecnico di Torino began in the 1990s. A comprehensive review of the related research activities carried out in the last three decades is here presented.
Lorenzo Casalino, Filippo Masseni, Dario Pastrone   +2 more
doaj   +1 more source

Young people's occupational aspirations beyond the aspiration discourse: A sociocultural perspective

British Educational Research Journal, EarlyView.
Abstract Young people's aspirations have been the focus of many educational, sociological and psychological studies. This paper argues, firstly, that the concept of aspirations holds greater generative potential than suggested by the policy‐oriented ‘aspiration discourse’.
Jelena Popov
wiley   +1 more source

Thermal Interaction Mechanisms of Ammonium Perchlorate and Ammonia Borane

Molecules
Ammonia borane (AB), with a theoretical hydrogen content of 19.6 wt%, is constrained by its low crystalline density (0.758 g/cm3) and poor thermal stability (decomposing at 100 °C).
Yunlong Zhang, Rui Pu, Shaoli Chen, Qilong Yan   +3 more
doaj   +1 more source

Design and development of a filament wound composite overwrapped pressure vessel

Composites Part C: Open Access, 2020
A detailed design optimization of a composite over wrapped pressure vessel (COPV) is performed through finite element analysis (FEA) and testing. The design optimization of a type IV polymer-lined composite overwrapped pressure vessel is performed by ...
Shah Alam, Gregory R. Yandek, Richard C. Lee, Joseph M. Mabry   +3 more
doaj   +1 more source

Optical Diagnostics for Solid Rocket Plumes Characterization: A Review

Energies, 2022
In recent decades, solid fuel combustion propulsion of spacecraft has become one of the most popular choices for rocket propulsion systems. The reasons for this success are a wide range of applications, lower production costs, simplicity, and safety. The
Angelica Maria Toscano, Marco Rocco Lato, Donato Fontanarosa, Maria Grazia De Giorgi   +3 more
doaj   +1 more source

In Situ Methanation on Mars: A Process Concept Study on the Impact of H2/CO2 and Recycle Ratio

Chemie Ingenieur Technik, EarlyView.
The rocket propellant methane can be produced on Mars by in situ resource utilization. The H2/CO2 ratio is decisive, and excess H2 is favored for providing sufficient propellant purity. The operation mode—with or without recycling of unreacted reactants—depends on the resource availability of the selected landing site. Abstract For return missions from
Franz Braun, Thomas‐Oliver Nagel, Samuel Prinz, Jens Friedland, Robert Güttel   +4 more
wiley   +1 more source

Experimental studies on the influence of chlorides on the combustion and agglomeration characteristics of solid propellants

Fuel Processing Technology
The main approach to improving the performance of aluminum-containing propellants is to promote the rupture of the oxide film on the surface of aluminum.
Lu Liu, Geng Xu, Zhan Wen, Guoqiang He, Peijin Liu, Wen Ao   +5 more
doaj   +1 more source

Chronic Low‐Dose Unsymmetrical Dimethylhydrazine Exposure in Rats: Multiorgan Mechanisms and Biomarker Identification

Journal of Applied Toxicology, EarlyView.
ABSTRACT Unsymmetrical dimethylhydrazine (UDMH), a highly toxic rocket propellant with known multiorgan effects, requires urgent characterization of its chronic low‐dose toxicity. Using an integrated approach including exploratory transcriptomics (n = 3/group) and metabolomic (n = 4/group) approaches in male Sprague–Dawley rats exposed to high‐dose ...
Fuzhou Liu, Bing Liu, Keli Wang, Xiaoyu Wang, Zhen Sun, Xiaojuan Pan, Zengming Zhao   +6 more
wiley   +1 more source