منابع مشابه
Quantitative Laws in Regeneration
It is well known that a long defoliated piece of stem of Bryophyllum calycinum forms shoots only at the apical or the two apical nodes, while when such a stem is cut into as many pieces as there are nodes each node produces shoots. It is shown in this paper that the dry weight of shoots produced in the apical nodes of a long piece of stem is approximately equal to the dry weight of shoots the s...
متن کاملQuantitative Laws in Regeneration. I
1. Equal masses of sister leaves of Bryophyllum calycinum produce equal masses of shoots and roots in equal time and under equal conditions. 2. The mass of shoots and roots produced by different masses of sister leaves in equal time and under equal conditions is approximately in direct proportion to the masses of the leaves. 3. When a piece of stem inhibits the production of shoots and roots in...
متن کاملA quantitative metabolomics peek into planarian regeneration.
The fresh water planarian species Schmidtea mediterranea is an emerging stem cell model because of its capability to regenerate a whole animal from a small piece of tissue. It is one of the best model systems to address the basic mechanisms essential for regeneration. Here, we are interested in studying the roles of various amines, thiols and nucleotides in planarian regeneration, stem cell fun...
متن کاملOn Quantitative Compactness Estimates for Hyperbolic Conservation Laws
We are concerned with the compactness in Lloc of the semigroup (St)t≥0 of entropy weak solutions generated by hyperbolic conservation laws in one space dimension. This note provides a survey of recent results establishing upper and lower estimates for the Kolmogorov ε-entropy of the image through the mapping St of bounded sets in L1 ∩ L∞, both in the case of scalar and of systems of conservatio...
متن کاملAxonal growth during regeneration: a quantitative autoradiographic study
The intraaxonal distribution of labeled glycoproteins in the regenerating hypoglossal nerve of the rabbit was studied by use of quantitative electron microscope autoradiography. 9 d after nerve crush, glycoproteins were labeled by the administration of [3H]fucose to the medulla. The distribution of transported 3H-labeled glycoproteins was determined 18 h later in segments of the regenerating ne...
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ژورنال
عنوان ژورنال: Journal of General Physiology
سال: 1922
ISSN: 1540-7748,0022-1295
DOI: 10.1085/jgp.4.4.447