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Jacob Christian Schäffer, alternatively Jakob, (31 May 1718 – 5 January 1790) was a German dean, professor of theology, botanist, mycologist, entomologist, ornithologist and inventor. He was a theologian and teacher at Ratisbon .
Jacob Joseph Taubenhaus (1884–1937) born in Safed, Palestine on October 20, 1884, was Chief of the Division of Plant Pathology and Physiology of the Texas Agricultural Experiment Station at the Agricultural and Mechanical College of Texas (now Texas A&M University) from 1916 until his death on December 13, 1937. [1]
Jacob Bernoulli published five treatises on infinite series between 1682 and 1704. The first two of these contained many results, such as the fundamental result that ∑ 1 n {\displaystyle \sum {\frac {1}{n}}} diverges, which Bernoulli believed were new but they had actually been proved by Pietro Mengoli 40 years earlier and was proved by ...
Three months prior to conducting the experiment, they maintained an average precipitation, air temperature, and overall subtropical environment. [6] Using 12 units, they filled them with aquifer water, sand and plants and kept them in isolation until the environment became suitable for phytoplankton to emerge. [6]
The experiment was only published posthumously in Ortus Medicinae (1648) and may have been inspired by Nicholas of Cusa who wrote on the same idea in De staticis experimentis (1450). Helmont grew a willow tree and measured the amount of soil, the weight of the tree and the water he added. After five years the plant had gained about 164 lbs (74 kg).
In 1699, John Woodward published his water-culture (hydroponic) experiments with spearmint. He found that plants in less pure water sources grew better than plants in distilled water. While still a student, he became interested in botany and natural history, and his attention during visits to Gloucestershire was drawn to the fossils found there ...
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Hartog Jakob or Hartog Jacob Hamburger (9 March 1859 – 4 January 1924) was a Dutch physiologist, born in Alkmaar. After completing the Hogere Burgerschool in Alkmaar, [ 1 ] Hamburger studied chemistry at Utrecht University , where he received his doctorate in 1883, [ 1 ] [ 2 ] on the determination of urea in urine. [ 1 ]