Results 131 to 140 of about 220,352 (294)

Albert Einstein visits Argentina [PDF]

open access: yesTodo es Historia 454 (May 2005), pp. 22-30, 2005
This is a detailed, day by day, account of Albert Einstein's activities, both social and scientific, during his 30-day stay in Argentina in 1925, including his lectures on relativity at the various local universities and his visit to the National Academy of Sciences, as follows from his personal Diary of the trip to South-America and other contemporary
arxiv  

In Situ Raman Spectroscopic Studies on Iron‐Based Catalysts During CO2 Fischer–Tropsch Synthesis

open access: yesChemCatChem, EarlyView.
Raman spectroscopy was employed to monitor iron‐catalzyed CO2‐Fischer–Tropsch synthesis toward higher hydrocarbons with alkali metal‐doped ferrous oxalate as precatalyst. The thermal transformation of MFeC2O4 into Fe3O4 as the major phase did not show a significant dependency on the presence and type of alkali metal dopant.
Jana Weiß   +3 more
wiley   +1 more source

Preliminary results from digestive adaptation: a new surgical proposal for treating obesity, based on physiology and evolution

open access: yesSão Paulo Medical Journal
CONTEXT AND OBJECTIVE: Most bariatric surgical techniques include essentially non-physiological features like narrowing anastomoses or bands, or digestive segment exclusion, especially the duodenum. This potentially causes symptoms or complications.
Sérgio Santoro   +5 more
doaj   +1 more source

On the scientific method learned from Albert Einstein in 2005 -- the World Year of Physics [PDF]

open access: yesarXiv, 2005
We review the physics at the end of the nineteenth century and summarize the process of the establishment of Special Relativity by Albert Einstein in brief. Following in the giant's footsteps, we outline the scientific method which helps to do research. We give some examples in illustration of this method.
arxiv  

Pyrazine‐Functionalized Ru(II)‐Complexes as Visible‐Light Activated Photobases

open access: yesChemistry – A European Journal, EarlyView.
Visible light excitation leads to the accumulation of electron density in pyrazine‐containing Ru(II) complexes via metal‐to‐ligand charge transfer (MLCT). In aqueous solutions of appropriate pH, excited‐state proton transfer (ESPT) takes place on a timescale of hundreds of ps.
Niklas Klosterhalfen   +6 more
wiley   +1 more source

Características clínicas e ecocardiográficas associadas à evolução do canal arterial em recém-nascidos com peso de nascimento inferior a 1.500g

open access: yesEinstein (São Paulo)
OBJETIVO: Identificar parâmetros clínicos e ecocardiográficos associados à evolução do canal arterial em recém-nascidos com peso de nascimento
Luiza Fortunato Visconti   +5 more
doaj   +1 more source

DFT‐Guided Synthesis, Electrochemical, and Photophysical Properties of Ruthenium(II) Polypyridyl Complexes Featuring Flavin‐Inspired π‐Extended Ligands

open access: yesChemistry – A European Journal, EarlyView.
The photophysical properties as well as the multielectron storage capacity of a several ruthenium(II) polypyridyl complexes with flavin‐inspired π‐extended ligands are investigated in a joint synthetic‐spectroscopic‐theoretical approach. Abstract Light‐driven electron transfer and subsequent multielectron storage is among the key aspects of ...
Nina Hagmeyer   +9 more
wiley   +1 more source

Matters of Gravity, The Newsletter of the Topical Group in Gravitation of the American Physical Society, Volume 32, Fall 2008 [PDF]

open access: yesarXiv, 2008
GGR News: - Remembering Wheeler, by Jim Isenberg; Research Briefs: - A Brief Summary of the WMAP5 Results, by Lyman Page; - Science with LIGO, by Maria Alessandra Papa; Conference Reports: - 7th LISA Symposium, by Edward K.
arxiv  

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