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Home > Dictionary of Science Quotations > Scientist Names Index F > Walther Flemming Quotes

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Walther Flemming
(21 Apr 1843 - 4 Aug 1905)

German anatomist who was the first to observe and describe systematically the behaviour of chromosomes in the cell nucleus during normal cell division (mitosis, a term he coined in 1882). He coined several other terms.

Science Quotes by Walther Flemming (1 quote)

Further study of the division phenomena requires a brief discussion of the material which thus far I have called the stainable substance of the nucleus. Since the term nuclear substance could easily result in misinterpretation..., I shall coin the term chromatin for the time being. This does not indicate that this substance must be a chemical compound of a definite composition, remaining the same in all nuclei. Although this may be the case, we simply do not know enough about the nuclear substances to make such an assumption. Therefore, we will designate as chromatin that substance, in the nucleus, which upon treatment with dyes known as nuclear stains does absorb the dye. From my description of the results of staining resting and dividing cells... it follows that the chromatin is distributed throughout the whole resting nucleus, mostly in the nucleoli, the network, and the membrane, but also in the ground-substance. In nuclear division it accumulates exclusively in the thread figures. The term achromatin suggests itself automatically for the unstainable substance of the nucleus. The terms chromatic and achromatic which will be used henceforth are thus explained.
— Walther Flemming
Science quotes on:  |  Absorb (54)  |  Assumption (96)  |  Being (1276)  |  Brief (37)  |  Call (781)  |  Cell (146)  |  Chemical (303)  |  Chromatic (4)  |  Chromatin (4)  |  Composition (86)  |  Compound (117)  |  Definite (114)  |  Discussion (78)  |  Division (67)  |  Do (1905)  |  Dye (10)  |  Enough (341)  |  Explain (334)  |  Figure (162)  |  Follow (389)  |  Ground (222)  |  Indicate (62)  |  Know (1538)  |  Known (453)  |  Material (366)  |  Membrane (21)  |  Must (1525)  |  Network (21)  |  Nuclear (110)  |  Nucleus (54)  |  Remaining (45)  |  Require (229)  |  Result (700)  |  Study (701)  |  Substance (253)  |  Term (357)  |  Terms (184)  |  Thread (36)  |  Throughout (98)  |  Time (1911)  |  Treatment (135)  |  Whole (756)  |  Will (2350)

See also:
  • 21 Apr - short biography, births, deaths and events on date of Flemming's birth.
  • More for Walther Flemming on Today in Science History page.

Carl Sagan Thumbnail In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion. (1987) -- Carl Sagan
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