منابع مشابه
Dosimetric effects of swelling or shrinking tissue during helical tomotherapy breast irradiation. A phantom study
During radiation therapy of the female breast, the actual target volume compared to the planning target volume may change due to swelling or shrinking of the tissue. Under- or overdosage is to be expected, especially when performing IMRT or tomotherapy techniques. The objective of this study is to develop a model-based quantification of these dose effects, with a particular focus on the changes...
متن کاملMembrane tension in swelling and shrinking molluscan neurons.
When neurons undergo dramatic shape and volume changes, how is surface area adjusted appropriately? The membrane tension hypothesis-namely that high tensions favor recruitment of membrane to the surface whereas low tensions favor retrieval-provides a simple conceptual framework for surface area homeostasis. With membrane tension and area in a feedback loop, tension extremes may be averted even ...
متن کاملSwelling and shrinking kinetics of a lamellar gel phase
David J. Fairhurst, Mark E. Baker, Neil Shaw, and Stefan U. Egelhaaf Department of Physics, Nottingham Trent University, Nottingham, NG11 8NS, United Kingdom Unilever Research, Port Sunlight Laboratory, Bebington, Wirral L63 3JW, United Kingdom Condensed Matter Physics Laboratory, Heinrich-Heine-University, 40225 Düsseldorf, Germany SUPA, School of Physics, The University of Edinburgh, Edinburg...
متن کاملMicropumps operated by swelling and shrinking of temperature-sensitive hydrogels.
This paper describes two types of polymeric micropumps based on the temperature-sensitive hydrogel poly(N-isopropylacrylamide). The gel actuators are realised as photopolymerised patterns and microgels. They are electrothermically controlled by resistive heating elements. The diffusion-based micropump contains a photopatterned monolithic actuator, which is placed within the pump chamber, and pr...
متن کاملEnergy recovery from solutions with different salinities based on swelling and shrinking of hydrogels.
Several technologies, including pressure-retarded osmosis (PRO), reverse electrodialysis (RED), and capacitive mixing (CapMix), are being developed to recover energy from salinity gradients. Here, we present a new approach to capture salinity gradient energy based on the expansion and contraction properties of poly(acrylic acid) hydrogels. These materials swell in fresh water and shrink in salt...
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: Nature
سال: 1997
ISSN: 0028-0836,1476-4687
DOI: 10.1038/37010