Franz Boll (26 February 1849,

Neubrandenburg Neubrandenburg (lit. ''New Brandenburg'', ) is a city in the southeast of Mecklenburg-Vorpommern, Germany. It is located on the shore of a lake called Tollensesee and forms the urban centre of the Mecklenburg Lakeland. The city is famous for its ...

– 19 December 1879,

Rome , established_title = Founded , established_date = 753 BC , founder = King Romulus (legendary) , image_map = Map of comune of Rome (metropolitan city of Capital Rome, region Lazio, Italy).svg , map_caption ...

) was a German physiologist and

histologist Histology, also known as microscopic anatomy or microanatomy, is the branch of biology which studies the microscopic anatomy of biological tissues. Histology is the microscopic counterpart to gross anatomy, which looks at larger structures vis ...

. He was the son of

Lutheran Lutheranism is one of the largest branches of Protestantism, identifying primarily with the theology of Martin Luther, the 16th-century German monk and Protestant Reformers, reformer whose efforts to reform the theology and practice of the Cathol ...

theologian Theology is the systematic study of the nature of the divine and, more broadly, of religious belief. It is taught as an academic discipline, typically in universities and seminaries. It occupies itself with the unique content of analyzing the ...

Franz Boll (1805–1875). Boll studied medicine in

Bonn The federal city of Bonn ( lat, Bonna) is a city on the banks of the Rhine in the German state of North Rhine-Westphalia, with a population of over 300,000. About south-southeast of Cologne, Bonn is in the southernmost part of the Rhine-Ru ...

Heidelberg Heidelberg (; Palatine German language, Palatine German: ''Heidlberg'') is a city in the States of Germany, German state of Baden-Württemberg, situated on the river Neckar in south-west Germany. As of the 2016 census, its population was 159,914 ...

and

Berlin Berlin ( , ) is the capital and List of cities in Germany by population, largest city of Germany by both area and population. Its 3.7 million inhabitants make it the European Union's List of cities in the European Union by population within ci ...

, and in 1870 worked at the physiological institute of

Emil du Bois-Reymond Emil Heinrich du Bois-Reymond (7 November 181826 December 1896) was a German physician and physiologist, the co-discoverer of nerve action potential, and the developer of experimental electrophysiology. Life Du Bois-Reymond was born in Berlin a ...

(1818–1896) in Berlin. Later he became a professor at the

University of Genoa The University of Genoa, known also with the acronym UniGe ( it, Università di Genova), is one of the largest universities in Italy. It is located in the city of Genoa and regional Metropolitan City of Genoa, on the Italian Riviera in the Liguri ...

, and from 1873 to 1879 was a professor of physiology in Rome. He died in Rome on 19 December 1879 at the age of 30.http://www.zeno.org/Pagel-1901/A/Boll,%2BFranz%2BChristian Biographical Dictionary of Doctors (1901) (translation from German) Boll is remembered for the discovery of rhodopsin, when he noticed that the light-sensitive

pigment A pigment is a colored material that is completely or nearly insoluble in water. In contrast, dyes are typically soluble, at least at some stage in their use. Generally dyes are often organic compounds whereas pigments are often inorganic compou ...

in the rods of the

retina The retina (from la, rete "net") is the innermost, light-sensitive layer of tissue of the eye of most vertebrates and some molluscs. The optics of the eye create a focused two-dimensional image of the visual world on the retina, which then ...

had a tendency to fade in the presence of illumination. He also published his findings in a pamphlet titled ''Sull'anatomia e fisiologia della retina'' (1877). His name is associated with the eponymous "Boll cells", being described as basal cells located in the

lacrimal gland The lacrimal glands are paired exocrine glands, one for each eye, found in most terrestrial vertebrates and some marine mammals, that secrete the aqueous layer of the tear film. In humans, they are situated in the upper lateral region of each or ...

. As a student of

Max Schultze Max Johann Sigismund Schultze (25 March 1825 – 16 January 1874) was a German microscopic anatomist noted for his work on cell theory. Biography Schultze was born in Freiburg im Breisgau (Baden). He studied medicine at Greifswald and Berlin, an ...

(1825–1874) at Bonn, he was the author of a significant histological treatise on

dental pulp The pulp is the connective tissue, nerves, blood vessels, and odontoblasts that comprise the innermost layer of a tooth. The pulp's activity and signalling processes regulate its behaviour. Anatomy The pulp is the neurovascular bundle centr ...

called Untersuchungen über die Zahnpulpa. He was married to the chemist and activist Margarete Traube, a daughter of the physician Ludwig Traube.

References

1849 births 1879 deaths People from Neubrandenburg German physiologists German histologists People from Mecklenburg-Strelitz University of Genoa faculty {{Germany-med-bio-stub