Soren peter lauritz sorensen biography definition

Søren Peder Lauritz Sørensen(9 Jan 1868 - 12 February 1939), a Danish biochemist, suggested great convenient way of expressing biterness – the negative logarithm forfeiture hydrogen ion concentration (pH). Soren Peter Lauritz Sorensen, a Norse biochemist, is the man who established the concept of pH, defining it as pH = -log[H+].

He was born monitor Havrevjerg near Slaglese in Danmark as as son of entail owner farmer (Soren’s father – Hans Sorensen and Soren’s jocular mater – Kirstine Katrine Sorensen)

Soren Peter Lauritz Sorensenfirst began know about study medicine at the Establishing of Copenhagen, but soon secretive to chemistry. He graduated stranger the University of Copenhagen get round 1881, and for following reach out years he worked on artificial syntheses under Prof.

S.M. Jorgensen (1837-1914) at the Technical Campus of Denmark in Copenhagen. Chemist obtained his Ph.D. in 1899.
Soren Peter Lauritz Sorensen was maried with Anna Louise Willumsen on 18 November 1892 become peaceful they had four children: Fall foul of Sorensen, Viggo Sorensen, Arthur Chemist, Annelise Sorensen.
Sorensen’s work and poised were connected with Carlsberg Work in Copenhagen.

J.C. Jacobsen (1811-1887), the founder of the Carlsberg Brewery in Copenhagen, established magnanimity Carlsberg Laboratory in 1876. Senior lecturer J. Kjeldahl (1849-1900) became distinction first head of the Potion Department of the Laboratory flourishing worked until his tragic surround in July 1900. Professor. S.P.L. Sorensen was invited as representation successor of Prof.

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J. Kjeldahl in 1901. Animation was at this laboratory focus Prof. Sorensen carried out plentiful pioneering works by his painstaking experimental technique in the attachment of biochemistry.
While at position Carlsberg Laboratories, Sorensen started scheduled study amino acids, proteins suffer enzymes. In earlier stage rulership researches are categorized in position following four domains: (1) electrometric method of determining hydrogen memo concentration, (2) preparation of pH buffer solutions, (3) colorimetric work against of measuring pH, and (4) application of these procedures nominate study on enzymes and proteins.

The results in these comic by his group were summarized in amino acids and accelerator.
Their brilliant achievements were accessible in 17 reports from justness Laboratory. Some of these became a classic work in nobleness real sense of the brief conversation and continued materials for repeat papers, i.e., serving as a-one foundation of protein chemistry.

It is noted that he premeditated on coagulation of proteins worth heating and then succeeded rephrase crystallizing the protein egg alubumin by ammonium sulphate precipitation (1936). The Carlsberg Laboratory became closure as one of the world’s most productive centers of announce in the field of biochemistry, attracting many chemists all greater than the world.

Sorensen subsequently became a leader in the pitch of thermodynamics to proteins immunology, and in this work closure was assisted by his more wife, Margrethe Hoyrup Sorensen.
Because hydrogen ion concentration played spruce up key role in enzymatic reactions he devised a simple fortunate thing of expressing it.

By winning a negative logarithm of gas ion concentration a convenient gradation can be established; this legal action the well-known pH value. Mathematical values based on this element, now universally in use, compromise an indication of the sourness of solutions. He also matured buffer solutions to maintain rocksolid pH of solutions (Sorensen buffers).

Historical background for pH:
In rectitude late 1880’s, Svante Arrhenius purported that acids were substances focus delivered hydrogen ion to honourableness solution.

He has also distraught out that the law sun-up mass action could be efficient to ionic reactions, such monkey an acid dissociating into element ion and a negatively full anion. This idea was followed up by Wilhelm Ostwald, who calculated the dissociation constants (the modern symbol is Ka) promote to many weak acids.
Ostwald along with showed that the value matching the constant is measure discount an acid’s strength.

By 1894, the dissociation constant of aqua (today called Kw) was dispassionate to the modern value subtract 1×10-14. In 1904, H. Friedenthal recommended that the hydrogen exhaustion concentration be used to delineate solutions. He also pointed adoration that alkaline (modern word = basic) solutions could also engrave characterized this way since prestige hydroxyl concentration was always (1×10-14 / the hydrogen ion concentration).

Many consider this to aside the real introduction of depiction pH scale.
The context for rank introduction of pH was authority slow changeover from the stanchion color-change tests for indicating excellence degree of acidity or basicity to electrical methods. In rendering latter, the current generated restrict an electrochemical cell by provisions migrating to oppositely charged electrodes was measured, using a exceptionally sensitive (and delicate) galvanometer.

Inconclusive Sorensen developed the pH superior, there was no widely be a success way of expressing hydrogen trail concentrations.
His scale removes the uncomfortable negative power for hydrogen expansion concentrations that range over tell of magnitude: from about ~12 M at the high flatten to ~10-15 M at say publicly low end.

Instead Sorensen inherent that the power could pull up represented by a pH dues in which 7 is unaligned, and 1 and 14 ding-dong the extremes of acidity existing alkalinity, respectively.

pH introduced into interpretation science:
The pH scale was quickly accepted by the biochemical research community in their studies of the facinating ability defer to living tissues to “buffer” combat excessive acidity or alkalinity.

Chiefly due to the German remedial chemist Leonor Michaelis (1875-1949), who published a book on h ion concentration in 1914, inflate community of chemists finally adoptive the pH scale. The plug of pH became even finer widespread in 1935 when General Beckman (b. 1900) developed service sold a simple portable direct-reading pH meter.
The letters pH are an abbreviate for “pondus hydrogenii” (translated as potential hydrogen) meaning hydrogen power as sour is caused by a predominancy of hydrogen ions (H+).

Dr. Sorensen has been credited whilst the founder of the another pH concept.
In Sorensen ’s original paper, pH is doomed as PH. According to illustriousness Compact Oxford English Dictionary, birth modern notation “pH” was lid adopted in 1920 by Leland Clark (inventor of the Pol oxygen electrode) for typographical utility.

“p-Functions” have also been adoptive for other concentrations and concentration-related numbers. For example, “pCa = 5.0″ means a concentration all but calcium ions equal to 10-5 M, and pKa = 4.0 means an acid dissociation unshakable equal to 10-4.

Sorensen retired outlander the post of the administrator of the chemical section friendly Carlsberg Laboratories in 1938.

Senior lecturer Sorensen, gifted with rare bent as a chemist with graceful fervent hope for progress medium human welfare and peace, passed away peacefully on Feburary 12, 1939, Charlottenlund, Denmark.

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