Jean paul walch (16 Ergebnisse)

Softcover. Zustand: Très bon. Ancien livre de bibliothèque avec équipements. Edition 2017. Ammareal reverse jusqu'à 15% du prix net de cet article à des organisations caritatives. ENGLISH DESCRIPTION Book Condition: Used, Very good. Former library book. Edition 2017. Ammareal gives back up to 15% of this item's net price to charity organizations.…

Zustand: Neuf.

Zustand: Neuf.

Zustand: New.

HRD. Zustand: New. New Book. Shipped from UK. Established seller since 2000.

HRD. Zustand: New. New Book. Shipped from UK. Established seller since 2000.

Zustand: New. In English.

Zustand: New. In English.

Zustand: New. pp. 242.

Zustand: New.

Zustand: New. 2023. 1st Edition. Hardback. . . . . . Books ship from the US and Ireland.

Zustand: New.

Buch. Zustand: Neu. Neuware - Symmetry and the causes of shifts in different types of symmetries in flowers follow specific patterns that are ruled by developmental and genetic factors. Using a unified system of phyllotaxic equations, we have modeled the molecular mechanisms and pressure forces that act in inflorescence and floral meristems, giving flowers their organ arrangement. In this book, we state general physical principles, whereby the symmetry of the perianth is derived from the symmetry of certain TCP gene expression. Thus, we define the interplay between the expression of CYC2-like genes and the phyllotactic mechanisms. This new evo-devo approach is applied to major groups of angiosperms with predominantly actinomorphic flowers (in which rare zygomorphy is positional) and groups with mainly bilaterally symmetrical flowers (in which zygomorphy is constitutional). It has thus allowed us to revisit the contributions of the great floral morphologists of the 20th and early 21st centuries.…

Buch. Zustand: Neu. Neuware - The equations of phyllotaxis were discovered by Douady and Couder: these describe the inhibition 'force' generated by an incipient primordium, preventing the initiation of other primordia in its vicinity: the method that was lacking was to take into account the distance of primordia to the meristem apex over the course of its development. With these parameters, our model integrates both biochemical 'forces' (inhibition due to auxin) and mechanical forces (contact pressure). This powerful tool allows us to revisit many important notions of plant biology. For example, we model auxin concentrations at the plant apex, as well as the development of vegetative and reproductive meristems. We also explain why the whorls of monocots are trimerous and those of plants with quincuncial perianths are pentamerous. We design a geometric method for reconstructing inflorescences from their building blocks, i.e. floral meristems. We also show that phyllotaxic spirals are only the application of a general property of symmetry, the advantages of which have been exploited by natural selection.…

Couverture souple. Zustand: Très bon. Zustand des Schutzumschlags: Très bon. Livre Tres bon etat general. Envoi soigne [en Stock]. Livre.

Couverture souple. Zustand: Comme neuf. Edition originale. Tirage limité à1000 exemplaires numéroté, celui-ci ne porte pas de numéro. De très nombreux schémas, photographies et croquis illustrent le guide de l'alpinisme. Deuxième titre de la collection guide, il vient compléter le fameux guide de la montagne.…