Results 321 to 330 of about 7,176,130 (391)

Effect of Indigenously Developed Nano-Hydroxyapatite Crystals from Chicken Egg Shell on the Surface Hardness of Bleached Human Enamel: An In Vitro Study.

Contemp Clin Dent, 2019
Kunam D, Sampath V, Manimaran S, Sekar M.   +3 more
europepmc   +1 more source

Some of the next articles are maybe not open access.

Related searches:

Hardness of Rough Surfaces

Nature Physical Science, 1971
DURING research on the contact of solid surfaces we have been examining the deformation under load of single asperities. These are formed by turning cones of base diameter about 0.2 mm on metal surfaces and are pressed against a hard anvil under known loads. The resulting flats are examined by relocation profilometry1 and by optical microscopy.
A. H. Uppal, T. R. Thomas, S. D. Probert
openaire   +2 more sources

The effects of intrinsic and extrinsic acids on nanofilled and bulk fill resin composites: Roughness, surface hardness, and scanning electron microscopy analysis

Microscopy research and technique (Print), 2019
The objective of this study was to examine the effects of extrinsic or intrinsic acids on nanofilled and bulk fill resin materials in vitro. A total of 90 disks were prepared using dental restorative material (Filtek Z350XT, GrandioSO, Filtek Bulk Fill ...
M. F. Alencar, Mirella T Pereira, M. R. de-Moraes, S. L. Santiago, V. Passos   +4 more
semanticscholar   +1 more source

The effect of surface hardness on friction

Wear, 1987
Abstract The influence of bulk hardness, surface hardness and strain-hardening rate on the frictional behavior of Cu-Sn and Cu-Al alloys was investigated. Unlubricated specimens were subjected to severe relative sliding against tool steel (D2) and aluminum bronze (Ampco 25) anvils under constant interference conditions.
John A. Schey, J.V. Reid
openaire   +2 more sources

The Generalized Soft-and-Hard Surface

30th European Microwave Conference, 2000, 2000
The well-known soft-and-hard surface (SHS) condition is one example of the ideal boundary condition defined by vanishing of the normal component of the complex Poynting vector at the boundary. It is shown that more general ideal boundary condition leads to a generalised SHS (GSHS) boundary where the real special direction on the surface is replaced by ...
Sergei A. Tretyakov, Ari J. Viitanen, Ismo V. Lindell   +2 more
openaire   +2 more sources

Hard surface cleaners

Journal of the American Oil Chemists' Society, 1981
AbstractThree key points for hard surface detergent making are: knowledge of raw materials, understanding of product application, and use of adequate test methods. The enormous variety of hard surface cleaner applications leads to a wide spectrum of product types.
openaire   +2 more sources

Random surfaces on hard spheres

Journal of Physics A: Mathematical and General, 1989
The relation between mass, M, and size, R, for self-avoiding random surfaces enclosing a hard sphere of radius r is examined. It is suggested that M approximately R2F((R - r)/r), with F proportional to the surface roughness. These functions are investigated using experimental data and theoretical arguments.
I J S Braga, C A F Castro, M A F Gomes
openaire   +2 more sources

A Hard Look at Running Surfaces

The Physician and Sportsmedicine, 1990
If running were controlled by OSHA, it probably would be banned. A runner hits the ground with a force of three to five times his or her body weight-a shock that is repeated over and over until the run ends. The type of surface can play a critical role in lessening the shock and therefore the risk of injury.
openaire   +3 more sources

Hard surface detergency

Journal of the American Oil Chemists' Society, 1961
In a study of hard surface detergency using glyceryl trioleate, oleic acid, and octanoic acid soils with three types of anionic and three types of nonionic syndets, only potassium laurate showed maximum detergency at the CMC (critical micelle concentration), with the potassium laurateoctanoic acid system being an exception.
openaire   +2 more sources