Natural de Sevilla. Licenciado en Química. Máster en Química Analítica (univ. de Sevilla y Aberdeen). Profesor de Física y Química y ... lo que haga falta.
Sevilla
Joined February 2012
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- Following1.9K
- Followers834
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Bernardo Rivero retweeted
El químico austriaco Hugo Weidel (1849 - 1899) describió la estructura del ácido nicotínico, el cual había obtenido por oxidación de la nicotina en 1873.
👇🏻
"Del veneno (la nicotina) a la vitamina (el ácido nicotínico)". share.google/nIOBrcosnTN6aAE…
Bernardo Rivero retweeted
Biblioteca de Geografía e Historia, en la Universidad de Santiago de Compostela.
"Biblioteca" es una palabra que no ha cambiado en miles de años
Viene del griego biblion, "libro" y theke, "armario", significa "lugar para guardar los libros"
Es uno los mejores lugares, ya lo escribió Borges, "el Paraíso tiene forma de biblioteca"
Hoy es el #diadelabiblioteca
Bernardo Rivero retweeted
El catedrático Antonio Casares (1812 - 1888) fue pionero en España de la ESPECTROSCOPÍA aplicada al análisis químico.
En la Universidad de Santiago de Compostela 👇
El químico austriaco Hugo Weidel (1849 - 1899) describió la estructura del ácido nicotínico, el cual había obtenido por oxidación de la nicotina en 1873.
👇🏻
"Del veneno (la nicotina) a la vitamina (el ácido nicotínico)". share.google/nIOBrcosnTN6aAE…
Bernardo Rivero retweeted
¿Un sismómetro de hace 2000 años?
¡Sí! ¡En el año 132, Zhang Heng inventó uno capaz de detectar terremotos a gran distancia! ¡Cuando se producía un seísmo, el dragón mejor orientado dejaba caer la bola en la boca del sapo correspondiente!
📷Reproducción (Museo de Toulouse)
Bernardo Rivero retweeted
'Paul Halpern’s The Great Atom Debate is a dual biography that should be of interest even to people who don’t care a whit about physics but love a good story, especially one showcasing two fascinating, driven characters.'
-Forbes
Preorder now:
amazon.com/gp/product/154160…
greatatomdebate.com
Link to the full review: forbes.com/sites/rebeccacoff…
Bernardo Rivero retweeted
What is colder than outer space itself?
A cloud of gas called the Boomerang Nebula. It blows gas away so fast that it cools below the faint afterglow of the Big Bang that fills the rest of the sky, making it the coldest known natural place.
At the other end, the Large Hadron Collider smashes lead nuclei together to make a droplet of quark-gluon plasma, the kind of matter that filled the universe in its first microseconds. It lives for a tiny fraction of a second.
Lord Kelvin proposed measuring temperature from absolute zero in 1848, which is why this ladder starts at the floor of the scale.
Peso en distintos planetas. El peso depende del lugar (según el valor de g; P = mg), la masa no.
Nota: kg es la unidad de masa en el SI. La unidad de peso es el Newton (N). Si medimos el peso en kg realmente son kgf o kp; kilogramos de fuerza o kilopondios.
Bernardo Rivero retweeted
Ondas 👇🏻
Why does a straw look bent in water, a violin ring in a hall, and a siren change pitch as it passes?
Waves, and the same nine ideas explain all of them. Light, sound and a ripple on a pond obey one rulebook.
The story starts in 1801, when Thomas Young shone light through two narrow slits and saw stripes of light and dark. Only waves can cancel each other like that, and that settled the argument about light for a century. Polarization later told us light waves wiggle sideways, which sound waves in air do not.
Pick any card and you will find it again in music, radio or a camera lens. Which one do you meet every day without noticing?
Bernardo Rivero retweeted
Alfred WEGENER, el meteorólogo que revolucionó la geología.
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Today Nov 1. #OTD in 1880 meteorologist Alfred Wegener was born. During his lifetime was known for research in meteorology and as a polar pioneer. Today known as originator of the continental drift hypothesis- suggesting that the continents are slowly drifting around the Earth.
Bernardo Rivero retweeted
Acuarela de las columnas romanas de la Alameda de Hércules, en Sevilla. Culminando las columnas de granito, capiteles y estatuas renacentistas (Hércules y Julio César).
La Alameda es el primer parque público de Europa (siglo XVI).
Autora: Enriqueta Martínez Torres.
LEVADURAS, detección de NEUTRINOS procedentes del espacio y más contenido muy interesante en el último "A hombros de gigantes" de @radio5_rne .
¿Te lo vas a perder?
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rneaudio.rtve.es/a/17289627
Ondas 👇🏻
Why does a straw look bent in water, a violin ring in a hall, and a siren change pitch as it passes?
Waves, and the same nine ideas explain all of them. Light, sound and a ripple on a pond obey one rulebook.
The story starts in 1801, when Thomas Young shone light through two narrow slits and saw stripes of light and dark. Only waves can cancel each other like that, and that settled the argument about light for a century. Polarization later told us light waves wiggle sideways, which sound waves in air do not.
Pick any card and you will find it again in music, radio or a camera lens. Which one do you meet every day without noticing?
Alfred WEGENER, el meteorólogo que revolucionó la geología.
👇🏻
Today Nov 1. #OTD in 1880 meteorologist Alfred Wegener was born. During his lifetime was known for research in meteorology and as a polar pioneer. Today known as originator of the continental drift hypothesis- suggesting that the continents are slowly drifting around the Earth.
Bernardo Rivero retweeted
¿Quién no ha usado la fenolftaleína?
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Eminent German chemist Adolf van Baeyer born #OTD in 1835 first synthesized indigo dye and the pH indicator phenolphthalein in addition to other discoveries. He also lends his name to the Baeyer-Villiger reaction for oxidation of ketones to esters and was awarded the 1905 Nobel Prize in Chemistry for his theories on ring strain. The German Chemical Society recognizes outstanding research in organic chemistry with an award in his name.
