Josef Herzig
Encyclopedia
Josef Herzig was an Austria
n chemist
.
Herzig was born in Sanok
, Galicia, which at that time was part of Austria-Hungary
. Herzig went to school in Breslau until 1874, started studying chemistry at the University of Vienna
but joined August Wilhelm von Hofmann
at the University of Berlin in the second semester. He worked with Robert Bunsen
at the University of Heidelberg and received his PhD for work with Ludwig Barth
at the University of Vienna
. He later became lecturer and, in 1897, professor at the University of Vienna
. He died in Vienna
in 1924.
s quercetin
, fisetin
and rhamnetin
as well as several alkaloid
s.
Austria
Austria , officially the Republic of Austria , is a landlocked country of roughly 8.4 million people in Central Europe. It is bordered by the Czech Republic and Germany to the north, Slovakia and Hungary to the east, Slovenia and Italy to the south, and Switzerland and Liechtenstein to the...
n chemist
Chemist
A chemist is a scientist trained in the study of chemistry. Chemists study the composition of matter and its properties such as density and acidity. Chemists carefully describe the properties they study in terms of quantities, with detail on the level of molecules and their component atoms...
.
Herzig was born in Sanok
Sanok
Sanok is a town in south-eastern Poland with 39,110 inhabitants, as of 2 June 2009. It's the capital of Sanok County in the Subcarpathian Voivodeship. Previously, it was in the Krosno Voivodeship and in the Ruthenian Voivodeship , which was part of the Lesser Poland province...
, Galicia, which at that time was part of Austria-Hungary
Austria-Hungary
Austria-Hungary , more formally known as the Kingdoms and Lands Represented in the Imperial Council and the Lands of the Holy Hungarian Crown of Saint Stephen, was a constitutional monarchic union between the crowns of the Austrian Empire and the Kingdom of Hungary in...
. Herzig went to school in Breslau until 1874, started studying chemistry at the University of Vienna
University of Vienna
The University of Vienna is a public university located in Vienna, Austria. It was founded by Duke Rudolph IV in 1365 and is the oldest university in the German-speaking world...
but joined August Wilhelm von Hofmann
August Wilhelm von Hofmann
August Wilhelm von Hofmann was a German chemist.-Biography:Hofmann was born at Gießen, Grand Duchy of Hesse. Not intending originally to devote himself to physical science, he first took up the study of law and philology at Göttingen. But he then turned to chemistry, and studied under Justus von...
at the University of Berlin in the second semester. He worked with Robert Bunsen
Robert Bunsen
Robert Wilhelm Eberhard Bunsen was a German chemist. He investigated emission spectra of heated elements, and discovered caesium and rubidium with Gustav Kirchhoff. Bunsen developed several gas-analytical methods, was a pioneer in photochemistry, and did early work in the field of organoarsenic...
at the University of Heidelberg and received his PhD for work with Ludwig Barth
Ludwig Barth
Ludwig Barth was a highly decorated Stabsfeldwebel in the Wehrmacht during World War II. He was also a recipient of the Knight's Cross of the Iron Cross. The Knight's Cross of the Iron Cross was awarded to recognise extreme battlefield bravery or successful military leadership...
at the University of Vienna
University of Vienna
The University of Vienna is a public university located in Vienna, Austria. It was founded by Duke Rudolph IV in 1365 and is the oldest university in the German-speaking world...
. He later became lecturer and, in 1897, professor at the University of Vienna
University of Vienna
The University of Vienna is a public university located in Vienna, Austria. It was founded by Duke Rudolph IV in 1365 and is the oldest university in the German-speaking world...
. He died in Vienna
Vienna
Vienna is the capital and largest city of the Republic of Austria and one of the nine states of Austria. Vienna is Austria's primary city, with a population of about 1.723 million , and is by far the largest city in Austria, as well as its cultural, economic, and political centre...
in 1924.
Work
Herzig was active in the chemistry of natural products. He succeeded in determining the structure of flavonoidFlavonoid
Flavonoids , are a class of plant secondary metabolites....
s quercetin
Quercetin
Quercetin , a flavonol, is a plant-derived flavonoid found in fruits, vegetables, leaves and grains. It also may be used as an ingredient in supplements, beverages or foods.-Occurrence:...
, fisetin
Fisetin
Fisetin is a flavonol, a structurally distinct chemical substance that belongs to the flavonoid group of polyphenols. It can be found in many plants, where it serves as a colouring agent...
and rhamnetin
Rhamnetin
Rhamnetin is an O-methylated flavonol, a type of chemical compound. It can be isolated from cloves.The structure of the molecule has been discovered by Austrian chemist Josef Herzig ....
as well as several alkaloid
Alkaloid
Alkaloids are a group of naturally occurring chemical compounds that contain mostly basic nitrogen atoms. This group also includes some related compounds with neutral and even weakly acidic properties. Also some synthetic compounds of similar structure are attributed to alkaloids...
s.