Mikhail Semyonovich Tsvet, also spelt Tsvett, Tswett, Tswet, Zwet, and Cvet (
Russian
Russian(s) may refer to:
*Russians (), an ethnic group of the East Slavic peoples, primarily living in Russia and neighboring countries
*A citizen of Russia
*Russian language, the most widely spoken of the Slavic languages
*''The Russians'', a b ...
: Михаил Семёнович Цвет; 14 May 1872 – 26 June 1919) was a Russian-Italian
botanist
Botany, also called plant science, is the branch of natural science and biology studying plants, especially Plant anatomy, their anatomy, Plant taxonomy, taxonomy, and Plant ecology, ecology. A botanist or plant scientist is a scientist who s ...
who invented
chromatography
In chemical analysis, chromatography is a laboratory technique for the Separation process, separation of a mixture into its components. The mixture is dissolved in a fluid solvent (gas or liquid) called the ''mobile phase'', which carries it ...
. His
last name is Russian for "colour" and is also the root word of "
flower
Flowers, also known as blooms and blossoms, are the reproductive structures of flowering plants ( angiosperms). Typically, they are structured in four circular levels, called whorls, around the end of a stalk. These whorls include: calyx, m ...
."
Biography
Mikhail Tsvet was born on 14 May 1872 in
Asti
Asti ( , ; ; ) is a ''comune'' (municipality) of 74,348 inhabitants (1–1–2021) located in the Italy, Italian region of Piedmont, about east of Turin, in the plain of the Tanaro, Tanaro River. It is the capital of the province of Asti and ...
, Italy. His mother was Italian, and his father was a Russian official. His mother died soon after his birth, and he was raised in
Geneva
Geneva ( , ; ) ; ; . is the List of cities in Switzerland, second-most populous city in Switzerland and the most populous in French-speaking Romandy. Situated in the southwest of the country, where the Rhône exits Lake Geneva, it is the ca ...
, Switzerland. He received his
BS degree from the Department of Physics and Mathematics at the
University of Geneva
The University of Geneva (French: ''Université de Genève'') is a public university, public research university located in Geneva, Switzerland. It was founded in 1559 by French theologian John Calvin as a Theology, theological seminary. It rema ...
in 1893. However, he decided to dedicate himself to
botany
Botany, also called plant science, is the branch of natural science and biology studying plants, especially Plant anatomy, their anatomy, Plant taxonomy, taxonomy, and Plant ecology, ecology. A botanist or plant scientist is a scientist who s ...
and received his PhD degree in 1896 for his work on
cell physiology
Physiology (; ) is the science, scientific study of function (biology), functions and mechanism (biology), mechanisms in a life, living system. As a branches of science, subdiscipline of biology, physiology focuses on how organisms, organ syst ...
. He moved to
Saint Petersburg
Saint Petersburg, formerly known as Petrograd and later Leningrad, is the List of cities and towns in Russia by population, second-largest city in Russia after Moscow. It is situated on the Neva, River Neva, at the head of the Gulf of Finland ...
, Russia, in 1896 because his father was recalled from the foreign service. There he started to work at the Biological Laboratory of the
Russian Academy of Sciences
The Russian Academy of Sciences (RAS; ''Rossíyskaya akadémiya naúk'') consists of the national academy of Russia; a network of scientific research institutes from across the Russian Federation; and additional scientific and social units such ...
. His Geneva degrees were not recognized in Russia, and he had to earn Russian degrees. In 1897 he became a teacher of botany courses for women. In 1902 he became a laboratory assistant at the Institute of Plant Physiology of the
Warsaw University
The University of Warsaw (, ) is a public research university in Warsaw, Poland. Established on November 19, 1816, it is the largest institution of higher learning in the country, offering 37 different fields of study as well as 100 specializat ...
(now in Poland). In 1903 he became an assistant professor and taught also at other Warsaw universities. After the beginning of
World War I
World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...
, the
Warsaw University of Technology
The Warsaw University of Technology () is one of the leading institutes of technology in Poland and one of the largest in Central Europe. It employs 2,453 teaching faculty, with 357 professors (including 145 titular professors). The student body ...
was evacuated to Moscow, Russia, and in 1916 again to
Gorki near Moscow. In 1917 he became a Professor of Botany and the director of the
botanical garden
A botanical garden or botanic gardenThe terms ''botanic'' and ''botanical'' and ''garden'' or ''gardens'' are used more-or-less interchangeably, although the word ''botanic'' is generally reserved for the earlier, more traditional gardens. is ...
s at the
University of Tartu
The University of Tartu (UT; ; ) is a public research university located in the city of Tartu, Estonia. It is the national university of Estonia. It is also the largest and oldest university in the country. (Yuryev) (now in
Estonia
Estonia, officially the Republic of Estonia, is a country in Northern Europe. It is bordered to the north by the Gulf of Finland across from Finland, to the west by the Baltic Sea across from Sweden, to the south by Latvia, and to the east by Ru ...
). In 1918 when German troops occupied the city, the university was evacuated to
Voronezh
Voronezh ( ; , ) is a city and the administrative centre of Voronezh Oblast in southwestern Russia straddling the Voronezh River, located from where it flows into the Don River. The city sits on the Southeastern Railway, which connects wes ...
, a large city in the south of
Central Russia
Central Russia is, broadly, the various areas in European Russia.
Historically, the area of Central Russia varied based on the purpose for which it is being used. It may, for example, refer to European Russia (except the North Caucasus and ...
. Tsvet died of a chronic inflammation of the throat on 26 June 1919 at the age of 47.
Chromatography
Mikhail Tsvet invented chromatography in 1900 during his research on plant
pigment
A pigment is a powder used to add or alter color or change visual appearance. Pigments are completely or nearly solubility, insoluble and reactivity (chemistry), chemically unreactive in water or another medium; in contrast, dyes are colored sub ...
s. He used liquid-adsorption
column chromatography
Column chromatography in chemistry is a chromatography method used to isolate a single chemical compounds, chemical compound from a mixture. Chromatography is able to separate substances based on differential absorption of compounds to the adsorbe ...
with
calcium carbonate
Calcium carbonate is a chemical compound with the chemical formula . It is a common substance found in Rock (geology), rocks as the minerals calcite and aragonite, most notably in chalk and limestone, eggshells, gastropod shells, shellfish skel ...
as
adsorbent
Adsorption is the adhesion of atoms, ions or molecules from a gas, liquid or dissolved solid to a surface. This process creates a film of the ''adsorbate'' on the surface of the ''adsorbent''. This process differs from absorption, in which a ...
and
petrol ether/
ethanol
Ethanol (also called ethyl alcohol, grain alcohol, drinking alcohol, or simply alcohol) is an organic compound with the chemical formula . It is an Alcohol (chemistry), alcohol, with its formula also written as , or EtOH, where Et is the ps ...
mixtures as
eluent to separate
chlorophyll
Chlorophyll is any of several related green pigments found in cyanobacteria and in the chloroplasts of algae and plants. Its name is derived from the Greek words (, "pale green") and (, "leaf"). Chlorophyll allows plants to absorb energy ...
s and
carotenoid
Carotenoids () are yellow, orange, and red organic pigments that are produced by plants and algae, as well as several bacteria, archaea, and fungi. Carotenoids give the characteristic color to pumpkins, carrots, parsnips, corn, tomatoes, cana ...
s. The method was described on 30 December 1901 at the XI Congress of Naturalists and Physicians (XI съезд естествоиспытателей и врачей) in St. Petersburg. The first printed description was in 1905, in the ''Proceedings of the Warsaw Society of Naturalists, biology section''. He first used the term "chromatography" in print in 1906 in his two papers about chlorophyll in the German botanical journal, ''Berichte der Deutschen botanischen Gesellschaft''. In 1907 he demonstrated his chromatograph for the German Botanical Society.
For several reasons, Tsvet's work was long ignored: the violent political upheaval in Russia at the beginning of the 20th century, the fact that Tsvet originally published only in Russian (making his results largely inaccessible to western scientists), and an article denying Tsvet's findings.
Richard Willstätter
Richard Martin Willstätter FRS(For) HFRSE (, 13 August 1872 – 3 August 1942) was a German organic chemist whose study of the structure of plant pigments, chlorophyll included, won him the 1915 Nobel Prize for Chemistry.
Life
Willstätter wa ...
and
Arthur Stoll tried to repeat Tsvet's experiments, but because they used an overly aggressive adsorbent (destroying the chlorophyll), were not able to do so. They published their results and Tsvet's chromatography method fell into obscurity. It was revived 10 years after his death thanks to Austrian
biochemist
Biochemists are scientists who are trained in biochemistry. They study chemical processes and chemical transformations in living organisms. Biochemists study DNA, proteins and Cell (biology), cell parts. The word "biochemist" is a portmanteau of ...
Richard Kuhn
Richard Johann Kuhn (; 3 December 1900 – 31 July 1967) was an Austrian-German biochemist who was awarded the Nobel Prize in Chemistry in 1938 "for his work on carotenoids and vitamins".
Biography
Early life
Kuhn was born in Vienna, Austria ...
and his student, German scientist
Edgar Lederer as well as the work of
A. J. Martin and
R. L. Synge.
Botanical author abbreviation
The standard
botanical author abbreviation Tswett is applied to plants that he described.
References
External links
*
R. Willstätter, A. Stoll, Untersuchungen über Chlorophyll Springer, Berlin (1913)
Biography of Mikhail S. Tsvet(pdf, in German)
Berichte der Deutschen botanischen Gesellschaft 24, 316–323 (1906)
{{DEFAULTSORT:Tsvet, Mikhail
1872 births
1919 deaths
19th-century botanists from the Russian Empire
Expatriates from the Russian Empire in Italy
Expatriates from the Russian Empire in Switzerland
Academic staff of the University of Tartu
Inventors from the Russian Empire
Botanists with author abbreviations
Chromatography
Russian scientists