943 research outputs found
Detergent-resistant plasma membrane proteome to elucidate microdomain functions in plant cells
Although proteins and lipids have been assumed to be distributed homogeneously in the plasma membrane (PM), recent studies suggest that the PM is in fact non-uniform structure that includes a number of lateral domains enriched in specific components (i.e., sterols, sphingolipids, and some kind of proteins). These domains are called as microdomains and considered to be the platform of biochemical reaction center for various physiological processes. Microdomain is able to be extracted as detergent-resistant membrane (DRM) fractions, and DRM fractions isolated from some plant species have been used for proteome and other biochemical characterizations to understand microdomain functions. Profiling of sterol-dependent proteins using a putative microdomain-disrupting agent suggests specific lipid–protein interactions in the microdomain. Furthermore, DRM proteomes dynamically respond to biotic and abiotic stresses in some plant species. Taken together, these results suggest that DRM proteomic studies provide us important information to understand physiological functions of microdomains that are critical to prosecute plant’s life cycle successfully in the aspect of development and stress responses
Nutrition-Physiology-Gene Interactions in the Chicken
Nutrition entails the sum of processes involved in the ingestion of foods, digestion, absorption, transport of nutrients, intermediary metabolism, underlying anabolism and catabolism, and excretion of unabsorbed nutrients and metabolites. Research at the Animal Nutrition Laboratory is concerned with the identification of nutritional characteristics in several animal species with the aid of comparative biochemistry and molecular biology. This mini-review provides an overview of the nutritional regulation of metabolism, physiological functions and gene expression in avian species
Some results concerning the valences of (super) edge-magic graphs
A graph is called edge-magic if there exists a bijective function
such that is a constant (called the valence of ) for each . If , then is called a super
edge-magic graph. A stronger version of edge-magic and super edge-magic graphs
appeared when the concepts of perfect edge-magic and perfect super edge-magic
graphs were introduced. The super edge-magic deficiency of a graph is defined to be either the smallest
nonnegative integer with the property that is super
edge-magic or if there exists no such integer . On the other
hand, the edge-magic deficiency of a graph is the
smallest nonnegative integer for which is edge-magic, being
always finite. In this paper, the concepts of (super)
edge-magic deficiency are generalized using the concepts of perfect (super)
edge-magic graphs. This naturally leads to the study of the valences of
edge-magic and super edge-magic labelings. We present some general results in
this direction and study the perfect (super) edge-magic deficiency of the star
A method to compute the strength using bounds
A numbering of a graph of order is a labeling that assigns
distinct elements of the set to the vertices of . The
strength of is defined by , where . A few lower and upper bounds for the strength are known
and, although it is in general hard to compute the exact value for the
strength, a reasonable approach to this problem is to study for which graphs a
lower bound and an upper bound for the strength coincide. In this paper, we
study general conditions for graphs that allow us to determine which graphs
have the property that lower and upper bounds for the strength coincide and
other graphs for which this approach is useless
Multipass Welding Stresses in Very Thick Plates and Their Reduction from Stress Relief Annealing
High-temperature thermoelectric properties of the double-perovskite ruthenium oxide (SrLa)ErRuO
We have prepared polycrystalline samples of (SrLa)ErRuO
and (SrLa)YRuO, and have measured the resistivity, Seebeck
coefficient, thermal conductivity, susceptibility and x-ray absorption in order
to evaluate the electronic states and thermoelectric properties of the doped
double-perovskite ruthenates. We have observed a large Seebeck coefficient of
-160 V/K and a low thermal conductivity of 7 mW/cmK for =0.1 at 800 K
in air. These two values are suitable for efficient oxide thermoelectrics,
although the resistivity is still as high as 1 cm. From the
susceptibility and x-ray absorption measurements, we find that the doped
electrons exist as Ru in the low spin state. On the basis of the
measured results, the electronic states and the conduction mechanism are
discussed.Comment: 6 pages, 4 figures, J. Appl. Phys. (accepted
Recent studies on the super edge-magic deficiency of graphs
A graph is called edge-magic if there exists a bijective function
such that is a constant for each . Also,
is said to be super edge-magic if . Furthermore, the
super edge-magic deficiency of a graph is defined
to be either the smallest nonnegative integer with the property that is super edge-magic or if there exists no such integer
. In this paper, we introduce the parameter as the minimum
size of a graph of order for which all graphs of order and size at
least have , and provide
lower and upper bounds for . Imran, Baig, and
Fe\u{n}ov\u{c}\'{i}kov\'{a} established that for integers with , , where is the
cartesian product of the cycle of order and the complete graph
of order . We improve this bound by showing that when is even. Enomoto,
Llad\'{o}, Nakamigawa, and Ringel posed the conjecture that every nontrivial
tree is super edge-magic. We propose a new approach to attak this conjecture.
This approach may also help to resolve another labeling conjecture on trees by
Graham and Sloane
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