16,231 research outputs found
New perspective in fisheries product development: importance of seaweeds as biomass resources
Brown seaweeds have an important role to preserve coastal ecosystems. Brown seaweeds are also major
class for aquacultured seaweeds. They contain valuable nutrients and bioactive components and some of
them have not been found in terrestrial plants. Especially, much attention has been paid to brown seaweed
lipids because of their high functionality. Several brown seaweeds show high total lipids (TL) contents,
ranging from 10-20 wt% per dry weight. The lipids are rich in functional 18:4n-3, 20:5n-3 and 20:4n-6.
Brown seaweed TL also contains fucoxanthin as a key functional compound. Brown seaweed lipids show
anti-obesity and anti-diabetic effects, which are mainly due to the up-regulatory effect of fucoxanthin on
energy expenditure in abdominal white adipose tissue and glucose utilization in muscle
Quantum Field Induced Orderings in Fully Frustrated Ising Spin Systems
We study ordering mechanisms which are induced by the quantum fluctuation in
fully frustrated Ising spin systems. Since there are many degenerated states in
frustrated systems, "order by thermal disorder" often takes place due to a kind
of entropy effect. To consider "order by quantum disorder" in fully frustrated
Ising spin systems, we apply transverse field as quantum fluctuation. There
exists a ferromagnetic correlation in each sublattice. The sublattice
correlation at zero temperature is enlarged due to transverse field. The
quantum fluctuation enhances the solid order at zero temperatures. This is an
example of quantum field induced ordering in fully frustrated systems. We also
study a case in which the transverse field induces a reentrant behavior as
another type of order by quantum disorder, and compare correspondent cases in
the classical systems.Comment: 3 pages, 4 figures, submitted to Proceedings of Symposia "Nanoscience
and Quantum Physics
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