This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1913 Excerpt: ...cells are impermeable for all strong bases (NaOH, KOH, tetraethylammoniumhydroxide) while they are permeable for weak bases like NH4OH or the amines.2 The bases as well as the acids must be able to diffuse into the egg in order to cause artificial parthenogenesis.3 3. When a trace of KCN is added to the alkaline ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1913 Excerpt: ...cells are impermeable for all strong bases (NaOH, KOH, tetraethylammoniumhydroxide) while they are permeable for weak bases like NH4OH or the amines.2 The bases as well as the acids must be able to diffuse into the egg in order to cause artificial parthenogenesis.3 3. When a trace of KCN is added to the alkaline solution its effect is diminished and the eggs must either remain longer in the alkaline solution or longer in the hypertonic solution in order to produce larvae. In former experiments on the unfertilized eggs of Strongylocentrotus the writer could show that the parthenogenetic effects (as well as the destructive effects) of NaOH can be inhibited if the solution is deprived of oxygen. 4. If the eggs of Arbacia are treated with alkali alone, without being afterward submitted to a treatment with a hypertonic solution, they may form fine gelatinous surface films (membranes) and begin to develop, but they will then disintegrate. To 50 c.c. m/2 (NaCl+KCl+CaCl2) were added 0.3 c.c. N/10 NH4OH, 0.3 c.c. N/10 NaOH, and 0.3 c.c. N/10 tetraethylammoniumhydroxide respectively. Unfertilized eggs of Arbacia were put into these three solutions for forty-two minutes and then transferred to normal sea-water. All of the eggs that had been in the solution containing the NH4OH segmented in a rather amoeboid way into two or four cells, after which the cells fell apart and disintegrated. All of the eggs that had been in 50 c.c. m/2 (NaCl+KCl+CaCl2)+0.3 c.c. N/10 NaOH for forty-two minutes remained practically intact and the same was true for the eggs that had been in the tetraethylammoniumhydroxide for forty-two minutes. In order to make sure that they did not only appear normal but were normal, sperm was added to these eggs the next morning. All those that had been in ...
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Add this copy of Artificial Parthenogenesis and Fertilization to cart. $30.01, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
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Add this copy of Artificial Parthenogenesis and Fertilization to cart. $105.00, very good condition, Sold by CooperTech. Books rated 1.0 out of 5 stars, ships from Long Beach, CA, UNITED STATES, published 1913 by U. of Chicago Press.
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Xl, vg; x, 312 p., illus, footnote references. ARTIFICIAL PARTHENOGENESIS and FERTILIZATION, Loeb, Jacques, xl, vg; x, 312 p., illus, footnote references, 23cm, orig cloth binding, He was the leading mechanist in U.S., tried to show that life phenomena can be reduced to physico-chemical law. Noted for 1899 art.