Results 81 to 90 of about 15,436 (313)

Performance simulation of multi-stage axial-flow compressor of turbo-shaft engine with account for erosive wear nonlinearity of its blades

open access: yesНаучный вестник МГТУ ГА, 2020
The construction and useful practice of gas-turbine engine diagnosis systems depend largely on the availability of the engine mathematical models and its certain components in their structure.
V. A. Potapov, A. A. Sanko
doaj   +1 more source

Rocketdyne's advanced coal slurry pumping program [PDF]

open access: yes, 1977
The Rocketdyne Division of Rockwell International Corporation is conducting a program for the engineering, fabrication, and testing of an experimental/prototype high-capacity, high-pressure centrifugal slurry feed pump for coal liquefaction purposes. The
Davis, D. E., Gilman, H. H., Wong, G. S.
core   +1 more source

Heteroatom‐Engineering Promoted Co9S8 Bi‐functional Electrocatalyst for Hydrazine‐Assisted Hydrogen Production at Industrial Current Density

open access: yesAdvanced Functional Materials, EarlyView.
Fe and P co‐doped Co9S8 nanocorals (Fe, P‐Co9S8) are successfully synthesized by a heteroatom engineering strategy, which exhibit outstanding bifunctional electrocatalytic performance for both the hydrogen evolution reaction (HER) and hydrazine oxidation reaction (HzOR).
Yuying Meng   +8 more
wiley   +1 more source

Improving the Erosion Corrosion Resistance Cavitation of Coatings TiN on Aluminum Exposed to Mixtures Bioetanol

open access: yesInternational Journal of Electrochemical Science, 2014
In the present work is determined, the increase in erosive wear resistance to cavitation, TiN coatings obtained by physical vapour deposition (PVD) on aluminium (99% commercially pure).
W. Aperador, E. Ruíz, A. Delgado
doaj   +1 more source

Structural Porosity and Low Mineral Density in Enamel Rods Drive Molar Incisor Hypomineralisation

open access: yesAdvanced Functional Materials, EarlyView.
This study uses advanced imaging modalities on multiple length scales to show that molar‐incisor hypomineralization does not present as a locally homogeneous pathology. Instead, microstructural defects, characterized through non‐mineralized, protein‐rich sheaths and an altered mineral structure in between prism rods, resulting in local differences in ...
Katharina Jähn‐Rickert   +14 more
wiley   +1 more source

Protective effect of green tea on dentin erosion and abrasion

open access: yesJournal of Applied Oral Science, 2009
OBJECTIVE: This in situ study evaluated the protective effect of green tea on dentin erosion (ERO) and erosion-abrasion (ABR). MATERIAL AND METHODS: Ten volunteers wore intraoral palatal appliances with bovine dentin specimens subjected to ERO or ERO ...
Melissa Thiemi Kato   +5 more
doaj   +1 more source

Etiopathogenetic consideration and definition of the clinical manifestation of erosive dental defects [PDF]

open access: yes, 2007
Dental defects of erosive nature are defined as irreversible losses of dental tissue, caused by long lasting and repeated action of acids that dissolve top layer of hydroxyapatite and fluorideapatites crystal structure, under assumption that aggressive ...
Blagojević Duška D., Stojšin Ivana M.
core   +1 more source

Bio‐Inspired Molecular Events in Poly(Ionic Liquids)

open access: yesAdvanced Functional Materials, EarlyView.
Originating from dipolar and polar inter‐ and intra‐chain interactions of the building blocks, the topologies and morphologies of poly(ionic liquids) (PIL) govern their nano‐ and micro‐processibility. Modulating the interactions of cation‐anion pairs with aliphatic dipolar components enables the tunability of properties, facilitated by “bottom‐up ...
Jiahui Liu, Marek W. Urban
wiley   +1 more source

Primary Crystallization of High Chromium Cast Steel in Metastable Conditions [PDF]

open access: yes, 2012
The analysis of the primary crystallization of wear corrosive-erosive high chromium cast steel was introduced in the article on the basis of investigations the widened method of the differential thermal analysis with testers DTA-C and DTA-Is.
A. Studnicki, J. Szajnar, M. Kondracki
core  

Monitoring the progression of erosive tooth wear (ETW) using BEWE index in casts and their 3D images : a retrospective longitudinal study [PDF]

open access: yes, 2018
Objective: To determine if the Basic erosive tooth wear index (BEWE index) is able to assess and monitor ETW changes in two consecutive cast models, and detect methodological differences when using the corresponding 3D image replicas.
Bottenberg, Peter   +4 more
core   +2 more sources

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