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C.B. van Niel's hypothesized that the oxygen released by plants during photosynthesis comes from carbon dioxide. In the 1930s, he studied photosynthesis in bacteria that make their carbohydrate from carbon dioxide but do not release oxygen. One such group used hydrogen sulfide, rather than water for photosynthesis, as illustrated by its chemical equation:
CO2 + 2 H2S-->[CH2O] + H2O + 2S
Since no oxygen was released in these experiments despite the presence of carbon dioxide, he concluded that carbon dioxide is not split into carbon and oxygen, at least in these bacteria, which helped to disprove the prevailing hypothesis of his day.
From his experiment results shown below, he also conjectured that all photosynthetic organisms require a hydrogen source although the source varies.
Sulfur bacteria: CO2 + 2 H2s-->[CH2O] + H2O + 2S
Plants: CO2 + 2 H2O--> [CH2O] + H2O + O2
General: CO2 + 2 H2X--> [CH2O] + H2O + 2X
Van Niel also used his inductive reasoning to hypothesize that the oxygen given off by photosynthetic plants is derived from water as plants split water as a source of electrons from hydrogen atoms, releasing oxygen as a byproduct, which later proven true two decades later as his hypothesis was tested using an isotope of oxygen that acts as a radioactive tracer to follow the oxygen atoms during photosynthesis.
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What is the verb of hypothesis?
hypothesize
Can you use the word hypothesize in a sentence?
yes,yes you can
How do scientists approach problems?
the scientific method: observe hypothesize predict experiment
Which of the following is not one of the steps in the scientific method Summarize Analyze Familiarize Hypothesize?
Familiarize
What are the 3 forces that scientists hypothesize move lithospheric plates?
scientist thought someone moved it
What is Niel van der Watt's birthday?
Niel van der Watt was born on December 28, 1962.
When was Niel van der Watt born?
Niel van der Watt was born on December 28, 1962.
When was C. B. van Niel born?
C. B. van Niel was born on 1897-11-04.
How old is Niel van der Watt?
Niel van der Watt is 48 years old (birthdate: December 28, 1962).
When did C. B. van Niel die?
Cees van Oyen died on November 9, 2007, in Leiden, Zuid-Holland, Netherlands.
What happens to all oxygen molecules that originated from carbon dioxide in the van niel experiment?
stuff happens
Explain van niel's hypothesis and describe how it contributed to our current understanding of photosynthesis?
Best Answer - Chosen by VotersIngenhousz's hypothesis that photosynthesis produces oxygen by splitting carbon dioxide was refuted about 150 years later by the Dutch-born microbiologist Cornelius van Niel (1897-1985) in America. Van Niel studied photosynthesis in anaerobic bacteria, rather than in higher plants. Like higher plants, these bacteria make carbohydrates during photosynthesis. Unlike plants, they do not produce oxygen during photosynthesis and they use bacteriochlorophyll rather than chlorophyll as a photosynthetic pigment. Van Niel found that all species of photosynthetic bacteria which he studied required an oxidizable substrate. For example, the purple sulfur bacteria use hydrogen sulfide as an oxidizable substrate and the overall equation for photosynthesis in these bacteria is: On the basis of his studies with photosynthetic bacteria, van Niel proposed that the oxygen which plants produce during photosynthesis is derived from water, not from carbon dioxide. In the following years, this hypothesis has proven true. Van Niel's brilliant insight was a major contribution to our modern understanding of photosynthesis
Is hypothesize a real word?
yes hypothesize is a real word and yes hypothesize is like hypothesis.
More info on niel van tonder south African poet?
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When did Niel Gow die?
Niel Gow died in 1807.
When was Niel Gow born?
Niel Gow was born in 1727.
When was Niel Nielson born?
Niel Nielson was born in 1954.
