SEARCH · Engineering Papers
Results for “activation”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Fe-based single-atom catalysis for oxidizing contaminants of emerging concern by activating peroxide
Explore the source record for details and available documents.
Structural Basis of Protein Arginine Methyltransferase Activation by a Catalytically Dead Homolog (P
Explore the source record for details and available documents.
Optimal test and sensor selection for active fault diagnosis using integer programming
Not provided.
Higher-order oligomerization of a chimeric αβγ bifunctional diterpene synthase with prenyltransferase and class II cyclase activities is concentration-dependent
Explore the source record for details and available documents.
Recognition of physiological phosphorylation sites by p21-activated kinase 4
Not Available
Numerical simulations of membrane distillation systems with actively heated membranes
Membrane distillation (MD) is a thermal desalination process that is gaining attention for treating hypersaline brines. One recent approach uses composite membranes with a thermally conductive layer that delivers heat to the membrane–feed interface, where it drives evaporation. Though this increases single-pass recovery, it comes with the challenge of promoting lateral heat conduction through the thin membrane. Herein, we develop a 3D, computational fluid dynamics (CFD) model that simulates conjugate heat, mass, and momentum transport in the feed channel and composite membrane. We then use the CFD to verify a simpler numerical model that approximates the feed velocity field analytically. We validate the numerical model experimentally, and use it to investigate the impacts of the conductive layer thickness, feed channel geometry, and operating conditions on temperature and concentration polarization, permeate production, and specific energy consumption. Overall, we find that lateral heating increases permeate production at the expense of increased concentration polarization. In extreme cases, the concentration increases more than four-fold along the membrane surface. Furthermore, we show however, that the feed flow rate and conductive layer thickness can be tailored to mitigate concentration polarization, for only a small reduction in permeate production.
Charging activation and desulfurization of MnS unlock the active sites and electrochemical reactivity for Zn-ion batteries
Not Available
Motivation and physical activity levels in bariatric patients involved in a self-determination theory-based physical activity program
Not Available
Identification of Radiolytically-Active Thermal Transition Phases in Boehmite
Abstract not provided
An Aromatic Cluster in the Active Site of epi-Isozizaene Synthase Is an Electrostatic Toggle for Divergent Terpene Cyclization Pathways
Explore the source record for details and available documents.
Transient-State Analysis of Human Isocitrate Dehydrogenase I: Accounting for the Interconversion of Active and Non-Active Conformational States
Abstract not provided