Proceedings of the American Philosophical Society Held at Philadelphia for Promoting Useful Knowledge, Том 68American Philosophical Society, 1929 |
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Сторінка 152
... root tip showed a beautiful correlation . The first slide gives a representative count on II control and II leaded roots . It is seen that in the central half the percentage mitosis in the normal root is twice as high as in the outer ...
... root tip showed a beautiful correlation . The first slide gives a representative count on II control and II leaded roots . It is seen that in the central half the percentage mitosis in the normal root is twice as high as in the outer ...
Сторінка 153
... roots from these ex- periments and cell size measured and mitotic percentages com- puted from nuclear counts . The ... root tip , there developed the working hypothesis that mi- tosis is stopped by lead because a compound essential for ...
... roots from these ex- periments and cell size measured and mitotic percentages com- puted from nuclear counts . The ... root tip , there developed the working hypothesis that mi- tosis is stopped by lead because a compound essential for ...
Сторінка 155
... root growth in length reaction of a few representative experiments . It is seen that stimulation is produced . In other experiments roots were first inhibited by lead and then transferred to sulfhydryl containing cultures after thorough ...
... root growth in length reaction of a few representative experiments . It is seen that stimulation is produced . In other experiments roots were first inhibited by lead and then transferred to sulfhydryl containing cultures after thorough ...
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Mans Future in the Light of His Past and Present By ALEŠ | 1 |
The Vegetation of the Screes or Talus Slopes of Western North | 13 |
Saxifraga Tolmiei Torr Gray a screecoverer | 20 |
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