Results 51 to 60 of about 2,714,937 (184)

Alternative Empirical Formula for Predicting the Frictional Drag Penalty due to Fouling on the Ship Hull using the Design of Experiments (DOE) Method

open access: yesInternational Journal of Technology, 2021
Biofouling is known as one of the main problems in the maritime sector because it can increase the surface roughness of the ship’s hull, which will increase the hull’s frictional resistance  and consequently, the ship’s fuel consumption and
Muhammad Luqman Hakim   +3 more
doaj   +1 more source

On the effect of Ti on Oxidation Behaviour of a Polycrystalline Nickel-based Superalloy [PDF]

open access: yes, 2018
Titanium is commonly added to nickel superalloys but has a well-documented detrimental effect on oxidation resistance. The present work constitutes the first atomistic-scale quantitative measurements of grain boundary and bulk compositions in the oxide ...
Bagot, P. A. J.   +8 more
core   +1 more source

Preparation of Polyester/ Micro Eggshell Fillers Composite as Natural Surface Coating

open access: yesIbn Al-Haitham Journal for Pure and Applied Sciences, 2023
To fabricate an inexpensive surface coating with excellent mechanical properties with good water resistance and thermal diffusion, white eggshell fibers with particle size (~1micrometer) has been added by different weight percentages (1,2,3,4,5,6,7 and 8
Aveen N. Jassim, Widad H. Jassim
doaj   +1 more source

Chemical Resistance of Nano Silica Added Concrete

open access: yesInternational Journal of Innovative Technology and Exploring Engineering, 2019
This study investigated the effects of nano silica on acid and sulphate resistance of concrete. The changes in mass and compressive strength of the concrete specimens for different immersion periods were determined. It was observed that, M 30 grade concrete produced with 0 %, 1 %, 2 %, 3 % nano silica have shown mass loss of 11.24 %, 9.01 %, 5.10 % and
Rajput Babalu*, Pimplikar Sunil
openaire   +1 more source

Regulation of the \u3cem\u3eEscherichia coli\u3c/em\u3e Tryptophan Operon by Early Reactions in the Aromatic Pathway [PDF]

open access: yes, 1970
7-Methyltryptophan (7MT) or compounds which can be metabolized to 7MT, 3-methylanthranilic acid (3MA) and 7-methylindole, cause derepression of the trp operon through feedback inhibition of anthranilate synthetase. Tyrosine reverses 3MA or 7-methylindole
Held, William A., Smith, Oliver H.
core   +1 more source

The fructose–copper connection: Added sugars induce fatty liver and insulin resistance via copper deficiency

open access: yesJournal of Metabolic Health, 2018
Background: Evidence suggests that the overconsumption of added sugars can induce fatty liver disease and insulin resistance. Aim: To propose a hypothesis that added sugars induce copper deficiency which can lead to hepatic iron overload, fatty liver ...
James J. DiNicolantonio   +2 more
doaj   +1 more source

Durability of Concrete With Coal Gasification Slag and Coal Gangue Powder

open access: yesFrontiers in Materials, 2022
Lack and quality decrease of supplementary cementing materials (SCMs) such as fly ash and granulated blast-furnace slag is increasingly prominent in China.
Xiaoliang Zhu   +3 more
doaj   +1 more source

New Mixture Additives for Sustainable Bituminous Pavements [PDF]

open access: yes, 2018
In an effort to improve mechanical properties of asphalt concrete, an exploratory research using mixture additives was attempted. Two different types of additives on two material scales were used: asphalt concrete (AC) level and binder level.
Kim, Yong-Rak   +4 more
core   +1 more source

Adittional levels between Landau bands due to vacancies in graphene: towards a defect engineering [PDF]

open access: yes, 2008
We describe the effects of vacancies on the electronic properties of a graphene sheet in the presence of a perpendicular magnetic field: from a single defect to an organized vacancy lattice. An isolated vacancy is the minimal possible inner edge, showing
Pereira, A. L. C., Schulz, P. A.
core   +2 more sources

Approximating the Added Resistance Coefficient for a Bulk Carrier Sailing in Head Sea Conditions Based on its Geometrical Parameters and Speed

open access: yesPolish Maritime Research, 2016
The article presents the mathematical function to calculate the added wave resistance transfer function for bulk carriers. Based on this function, the statistical mean added wave resistance generated by an irregular head wave with arbitrary statistical ...
Cepowski Tomasz
doaj   +1 more source

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