منابع مشابه
Phototropic Curvature in Phycomyces
The distribution of curvature and of bending speed along the cell's growing region are studied during steady state phototropic bending. At the start, elemental bending speed parallels the known axial distribution of growth rate. Hence regional phototropic sensitivity is initially determined by the local growth rate, and unilateral visible light acts proportionally at all levels of the growth zo...
متن کاملPlant Phototropic Growth
Plants are photoautotrophic sessile organisms that use environmental cues to optimize multiple facets of growth and development. A classic example is phototropism - in shoots this is typically positive, leading to growth towards the light, while roots frequently show negative phototropism triggering growth away from the light. Shoot phototropism optimizes light capture of leaves in low light en...
متن کاملThe Phototropic Excitation of Limax
The photic orientation of Limax creeping geotropically upon a vertical plate is such that the phototropic vector determining the angular deflection beta from the vertical path is proportional to log I. This is proved by the fact that with horizontal illumination tan beta is directly proportional to log I; with non-horizontal light rays from a small source the ratio See PDF for Equation is direc...
متن کاملThe Phototropic Mechanism in Ranatra
Definite proof is obtained that in the phototropic orientation of Ranatra the relative postures of the appendages, resulting in a bilateral difference of effective stroke in swimming, is the mechanism of orientation; the frequency of locomotor movements is the same on the two sides of the body.
متن کاملPhototropic Circus Movements of Limax As
The forms of the quanitative relationship between temperature and the responses of animals to light might be expected to differ according to the aspect of reaction which is measured as index of excitation. Thus in the clam Mya (Hecht, 1919-20, a) the primary photic excitation process for siphon retraction has a very low temperature coefficient such as is characteristic of photochemical changes,...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Chemical Education
سال: 2001
ISSN: 0021-9584,1938-1328
DOI: 10.1021/ed078p1596.1