Results 21 to 30 of about 1,186,113 (254)

The St Andrews Periodic Table Wallchart and its Use in Teaching

open access: yesSubstantia, 2019
An early surviving copy of a periodic table of the elements wallchart is described and it is compared with other early versions of the periodic table. The status of chemistry teaching in St Andrews at the time and particularly the lectures of Professor ...
R. Alan Aitken, M. Pilar Gil
doaj   +1 more source

Molecular Classification of Pesticides Including Persistent Organic Pollutants, Phenylurea and Sulphonylurea Herbicides

open access: yesMolecules, 2014
Pesticide residues in wine were analyzed by liquid chromatography–tandem mass spectrometry. Retentions are modelled by structure–property relationships.
Francisco Torrens, Gloria Castellano
doaj   +1 more source

The Periodic Table in Croatia [PDF]

open access: yesKemija u Industriji, 2011
The Croatian (Yugoslav) Academy of Sciences and Arts was the first academy to elect D. I. Mendeleev as its honorary member (1882), whereas the periodic table of the elements has been taught regularly at the Zagreb University since 1888.
Raos, N.
doaj  

The Periodic Table and Kinetics?

open access: yesCHIMIA, 2019
Mendeleev in his first publication ordered the chemical elements following an apparent periodicity of properties such as atomic volume and valence. The reactivity of the elements was only studied systematically many years later.
Lothar Helm, André E. Merbach
doaj   +1 more source

A quasi-periodic oscillation in the blazar J1359+4011 [PDF]

open access: yes, 2013
The OVRO 40-m telescope has been monitoring the 15 GHz radio flux density of over 1200 blazars since 2008. The 15 GHz light curve of the flat spectrum radio quasar J1359+4011 shows a strong and persistent quasi-periodic oscillation. The time-scale of the
Hovatta, T.   +8 more
core   +4 more sources

Probing the (empirical) quantum structure embedded in the periodic table with an effective Bohr model

open access: yesQuímica Nova, 2013
The atomic shell structure can be observed by inspecting the experimental periodic properties of the Periodic Table. The (quantum) shell structure emerges from these properties and in this way quantum mechanics can be explicitly shown considering the ...
Wellington Nardin Favaro   +1 more
doaj   +3 more sources

Water and the Periodic Table

open access: yesSubstantia, 2019
Once upon a time, there was a Russian guy named Dmitri Mendeleev (1834-1907), who became Doctor of Science in 1865 at Saint Petersburg State University for his dissertation «On the Combinations of Water with Alcohol», a most important mixture in eastern ...
Marc Henry
doaj   +1 more source

Mendeleev’s discovery of the periodic table and the first European Academy of Sciences to honour him

open access: yesActa Pharmaceutica, 2023
The chemical science community will commemorate the 155th anniversary of Mendeleev’s groundbreaking discovery of the periodic table of elements in 2024.
Flegar Vanja Horvat, Inić Suzana
doaj   +1 more source

The state of food composition databases: data attributes and FAIR data harmonization in the era of digital innovation

open access: yesFrontiers in Nutrition
IntroductionFood composition databases (FCDBs) are essential resources for characterizing, documenting, and advancing scientific understanding of food quality across the entire spectrum of edible biodiversity.
Sarah Brinkley   +21 more
doaj   +1 more source

Universal Correction of Density Functional Theory to Include London Dispersion (up to Lr, Element 103) [PDF]

open access: yes, 2012
Conventional density functional theory (DFT) fails to describe accurately the London dispersion essential for describing molecular interactions in soft matter (biological systems, polymers, nucleic acids) and molecular crystals.
Choi, Jeong-Mo   +2 more
core   +2 more sources

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