Results 321 to 330 of about 922,585 (380)

Comparison and Evaluation of Various Drying Methods on Surface Hardness of Type IV Dental Stones: An <i>In vitro</i> Study.

J Pharm Bioallied Sci
Sriteja D, Thorreti VL, Ravindra SV, Rohit M, Pudi S, Kumar AK.   +5 more
europepmc   +1 more source

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Hard to Swallow

New England Journal of Medicine, 2021
Hard to Swallow A previously healthy 20-year-old college student presented before the Covid-19 pandemic with a 3-day history of throat pain, malaise, cough, and chills.
Mary W Montgomery, Amy L. Miller, Joseph Loscalzo, Kirstin M. Small, Michael J Litt   +4 more
openaire   +3 more sources

Effect of reinforced aluminium alloy LM30 with pure ceramic particles to evaluate hardness and wear properties

Materials research innovations (Print), 2020
In this paper, the hardness and wear properties of pure ceramic particles like silicon carbide, boron carbide and graphite are considered in micron size with the reinforced aluminium LM30 metal matrix composites. The stir casting setup is used to prepare
T. Sathish, Somasundaram Saravanan, V. Vijayan   +2 more
semanticscholar   +1 more source

Hard Times [PDF]

SSRN Electronic Journal, 2011
We show that the stock market downturns of 2000–2002 and 2007–2009 have very different proximate causes. The early 2000s saw a large increase in the discount rates applied to profits by rational investors, while the late 2000s saw a decrease in rational expectations of future profits.
Campbell, John, Giglio, Stefano, Polk, Christopher   +2 more
openaire   +3 more sources

Absolute hardness: companion parameter to absolute electronegativity

, 1983
For neutral and charged species, atomic and molecular, a property called absolute hardness eta is defined. Let E(N) be a ground-state electronic energy as a function of the number of electrons N. As is well-known, the derivative of E(N) with respect to N,
R. Parr, R. Pearson
semanticscholar   +1 more source

Absolute Electronegativity and Hardness: Application to Inorganic Chemistry

, 1988
The recent concepts of absolute electronegativity, {chi}, and absolute hardness, {eta}, are briefly reviewed. Experimental values for a large number of molecules and radicals are presented.
R. Pearson
semanticscholar   +1 more source