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le livre d'or

Merci à tous ceux qui ont laissé une trace de leur passage...
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mandingOO

- 28/06/2012

rowr

- 28/06/2012

Il ya quelques points qui attirent l'attention dans le temps sur cet article mais je ne sais pas si je vois tous les centre cardiaque . Il peut y avoir une certaine validite , mais je vais prendre l'opinion attente jusqu'a ce que je examiner de plus pres . Bon article , merci , et nous aimerions de plus! Ajoute a FeedBurner ainsi

Feourevf

- 27/06/2012

Ïðåäëàãàþ ðàññûëêó ïî ôîðóìàì,áëîãàì,ãîñòåâûì êíèãàì,êàòàëîãàì,
äîñêàì,ñïåöèàëüíûì äâèæêàì.
Ðîñò áýêëèíêîâ,PR,òðàôèê.
Öåíû îò 10$.
ICQ 623935432

Hextteleimigo

- 25/06/2012

Invention of Lithium
Dr. Doug Stewart
Lithium was discovered past Johan Arfvedson in 1817, during an analysis of petalite
(LiAlSi4O10).

He create the petalite contained ¡°silica, alumina and an alkali.¡± (1)

The unknown alkali metal in the petalite had harmonious ' properties.

It required more acid to neutralize it than sodium and its carbonate was no more than sparingly soluble in water ¨C distant from sodium carbonate.

The imaginative alkali differed from potassium because it did not exchange a reckless with tartaric acid.

Arfvedson tried to produce a pure sample of the new metal past electrolysis, but he was ineffective; the battery he reach-me-down was not effectual enough. (2)

The utter metal was unique the following year by both William Brande and Humphry Davy working independently.

Davy obtained a minuscule volume of lithium metal aside electrolysis of lithium carbonate. (3)

He notable the modish ingredient had a red flame color a certain extent like strontium and produced an alkali explanation when dissolved in water.

In days less safety-conscious than the record, Brande said of lithium, ¡°its fluid tastes acrid like the other persistent alkalies.¡± (4)

Via 1855 Robert Bunsen and Augustus Matthiessen were independently producing the metal in hefty quantities not later than electrolysis of molten lithium chloride.

Lithium¡¯s name is derived from the Greek facts ¡®lithos¡¯ significance, ¡®stone.¡¯

iicefey

- 24/06/2012

When buying your inception investment riches, something to over concerning is the possibility of being a holdings supervisor or perhaps hiring everyone if being a innkeeper is not appealing.