Robert Hill FRS (2 April 1899 – 15 March 1991), known as Robin Hill, was a British plant biochemist who, in 1939, demonstrated the '

Hill reaction The Hill reaction is the light-driven transfer of electrons from water to Hill reagents (non-physiological oxidants) in a direction against the chemical potential gradient as part of photosynthesis. Robin Hill discovered the reaction in 1937. He d ...

' of

photosynthesis Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's activities. Some of this chemical energy is stored i ...

, proving that

oxygen Oxygen is the chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as wel ...

evolved Evolution is change in the heritable characteristics of biological populations over successive generations. These characteristics are the expressions of genes, which are passed on from parent to offspring during reproduction. Variation t ...

during the light requiring steps of photosynthesis. He also made significant contributions to the development of the

Z-scheme Light-dependent reactions is jargon for certain photochemical reactions that are involved in photosynthesis, the main process by which plants acquire energy. There are two light dependent reactions, the first occurs at photosystem II (PSII) and ...

of oxygenic photosynthesis.

Education and early life

Hill was born in New Milverton, a suburb of

Leamington Spa Royal Leamington Spa, commonly known as Leamington Spa or simply Leamington (), is a spa town and civil parish in Warwickshire, England. Originally a small village called Leamington Priors, it grew into a spa town in the 18th century following ...

Warwickshire Warwickshire (; abbreviated Warks) is a county in the West Midlands region of England. The county town is Warwick, and the largest town is Nuneaton. The county is famous for being the birthplace of William Shakespeare at Stratford-upon-Avon an ...

. He was educated at

Bedales School Bedales School is a co-educational, boarding and day independent school in the village of Steep, near the market town of Petersfield in Hampshire, England. It was founded in 1893 by John Haden Badley in reaction to the limitations of conventio ...

, where he became interested in

biology Biology is the scientific study of life. It is a natural science with a broad scope but has several unifying themes that tie it together as a single, coherent field. For instance, all organisms are made up of cells that process hereditary i ...

and

astronomy Astronomy () is a natural science that studies astronomical object, celestial objects and phenomena. It uses mathematics, physics, and chemistry in order to explain their origin and chronology of the Universe, evolution. Objects of interest ...

(he published a paper on

sunspot Sunspots are phenomena on the Sun's photosphere that appear as temporary spots that are darker than the surrounding areas. They are regions of reduced surface temperature caused by concentrations of magnetic flux that inhibit convection. Sun ...

s in 1917), and

Emmanuel College, Cambridge Emmanuel College is a constituent college of the University of Cambridge. The college was founded in 1584 by Sir Walter Mildmay, Chancellor of the Exchequer to Elizabeth I. The site on which the college sits was once a priory for Dominican mon ...

, where he read

Natural Sciences Natural science is one of the branches of science concerned with the description, understanding and prediction of natural phenomena, based on empirical evidence from observation and experimentation. Mechanisms such as peer review and repeatab ...

. During the

First World War World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fightin ...

he served in the Anti-gas Department of the

Royal Engineers The Corps of Royal Engineers, usually called the Royal Engineers (RE), and commonly known as the ''Sappers'', is a corps of the British Army. It provides military engineering and other technical support to the British Armed Forces and is heade ...

Career

In 1922, he joined the Department of Biochemistry at Cambridge, where he was directed to research

hemoglobin Hemoglobin (haemoglobin BrE) (from the Greek word αἷμα, ''haîma'' 'blood' + Latin ''globus'' 'ball, sphere' + ''-in'') (), abbreviated Hb or Hgb, is the iron-containing oxygen-transport metalloprotein present in red blood cells (erythrocyte ...

. He published a number of papers on hemoglobin, and in 1926 he began to work with

David Keilin David Keilin FRS (21 March 1887 – 27 February 1963) was a Jewish scientist focusing mainly on entomology. Background and education He was born in Moscow in 1887 and his family returned to Warsaw early in his youth. He did not attend scho ...

on the

haem Heme, or haem (pronounced / hi:m/ ), is a precursor to hemoglobin, which is necessary to bind oxygen in the bloodstream. Heme is biosynthesized in both the bone marrow and the liver. In biochemical terms, heme is a coordination complex "consist ...

containing

protein Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues. Proteins perform a vast array of functions within organisms, including catalysing metabolic reactions, DNA replication, respo ...

cytochrome c The cytochrome complex, or cyt ''c'', is a small hemeprotein found loosely associated with the inner membrane of the mitochondrion. It belongs to the cytochrome c family of proteins and plays a major role in cell apoptosis. Cytochrome c is hig ...

. In 1932, he commenced work on plant biochemistry, focusing on photosynthesis and the oxygen evolution of

chloroplast A chloroplast () is a type of membrane-bound organelle known as a plastid that conducts photosynthesis mostly in plant and algal cells. The photosynthetic pigment chlorophyll captures the energy from sunlight, converts it, and stores it in ...

s, leading to the discovery of the 'Hill reaction'. From 1943, Hill's work was funded by the Agricultural Research Council (ARC), although he continued to work in the Cambridge Biochemistry Department. Hill continued to receive most of his recognition for his earlier work on photosynthesis, and beginning in the late 1950s, his work concentrated on the energetics of photosynthesis. In collaboration with Fay Bendall, he made his second great contribution to photosynthesis research with the discovery of the 'Z scheme' of electron transport. Hill retired from the ARC in 1966, although his research at Cambridge continued until his death in 1991. In his later years Hill worked on the issue of the application of the

Second Law of Thermodynamics The second law of thermodynamics is a physical law based on universal experience concerning heat and Energy transformation, energy interconversions. One simple statement of the law is that heat always moves from hotter objects to colder objects ( ...

to photosynthesis. He was an expert on

natural dye Natural dyes are dyes or colorants derived from plants, invertebrates, or minerals. The majority of natural dyes are vegetable dyes from plant sources—roots, berries, bark, leaves, and wood—and other biological sources such as fungi. Archaeol ...

s and cultivated plants such as madder and woad. He painted watercolours using pigments he himself extracted. In the 1920s, he developed a fish-eye camera and used it to take stereoscopic whole-sky images, recording cloud patterns in three dimensions.

Awards and honours

The Robert Hill Institute at the

University of Sheffield , mottoeng = To discover the causes of things , established = – University of SheffieldPredecessor institutions: – Sheffield Medical School – Firth College – Sheffield Technical School – University College of Sheffield , type = Pu ...

, from which he received an

honorary degree An honorary degree is an academic degree for which a university (or other degree-awarding institution) has waived all of the usual requirements. It is also known by the Latin phrases ''honoris causa'' ("for the sake of the honour") or ''ad hono ...

in 1990, was named after him. Hill was elected a Fellow of the Royal Society (FRS) in 1946, his certificate of election reads: He was awarded the

Royal Medal The Royal Medal, also known as The Queen's Medal and The King's Medal (depending on the gender of the monarch at the time of the award), is a silver-gilt medal, of which three are awarded each year by the Royal Society, two for "the most important ...

in 1963, and the

Copley Medal The Copley Medal is an award given by the Royal Society, for "outstanding achievements in research in any branch of science". It alternates between the physical sciences or mathematics and the biological sciences. Given every year, the medal is t ...

in 1987.

References

{{DEFAULTSORT:Hill, Robin 1899 births 1991 deaths People from Leamington Spa Alumni of Emmanuel College, Cambridge English biochemists Fellows of the Royal Society Foreign associates of the National Academy of Sciences Recipients of the Copley Medal Researchers of photosynthesis Royal Medal winners People educated at Bedales School