New bleeding model of additives in a polypropylene film under atmospheric pressure

Many additives are commercially used to add more favorable qualities to films. The bleeding process by which the additive in a film comes to the surface is considered. A new bleeding model of additives in a polypropylene film under atmospheric pressure was investigated. Solubility and diffusion are found to be important for explaining this bleeding process. The solubilities and diffusion coefficients of higher fatty acid amides such as erucamide (13-cis-docosenamide) and behenamide (docosanamide) were determined between 40 and 70°C and the difference between the solubilities and the diffusion coefficients was discussed. The experimental results are explained more precisely by assuming two transport processes between the crystalline regions and the amorphous ones. © 2007 Wiley Periodicals, Inc

New bleeding model of additives in a polypropylene film under atmospheric pressure II

金沢大学大学院自然科学研究科出光興産㈱　先進技術研究所　解析技術センター 第二解析技術室Many additives are commercially used to add more favorable qualities to films. The bleeding process by which the additive in a film comes to the surface is considered. A new bleeding model of additives in a polypropylene film under atmospheric pressure was investigated. Solubility and diffusion are found to be important for explaining this bleeding process. It was found that the experimental results were explained more precisely by assuming a twostep transport process between the crystalline regions and the amorphous ones. The solubilities and diffusion coefficients of UV-stabilizers such as 2-(2H-benzotriazol-2-yl)-4(l,l,3,3-tetramethylbutyl)phenol and 2-(2H-benzotriazol-2yl)-4-methylphenol were determined at 4O°C. The difference between the saturation solubilities and the diffusion coefficients of UV-stabilizers was discussed by comparing with the results of molecular dynamics (MD) simulation. © 2007 Wiley Periodicals, Inc

Binder Parameter of a Heisenberg Spin-Glass Model in Four Dimensions

We studied the phase transition of the $\pm J$ Heisenberg model with and without a random anisotropy on four dimensional lattice $L\times L\times L\times (L+1)$ $(L\leq 9)$. We showed that the Binder parameters $g(L,T)$'s for different sizes do not cross even when the anisotropy is present. On the contrary, when a strong anisotropy exists, $g(L,T)$ exhibits a steep negative dip near the spin-glass phase transition temperature $T_{\rm SG}$ similarly to the $p-$state infinite-range Potts glass model with $p \geq 3$, in which the one-step replica-symmetry-breaking (RSB) occurs. We speculated that a one-step RSB-like state occurs below $T_{\rm SG}$, which breaks the usual crossing behavior of $g(L,T)$.Comment: 4 pages including 4 figures, submitted to Phys. Rev.

Role of Angiotensin II in Nucleus Tractus Solitarius

歯科基礎医学会ライオン学術

Dark streams observed on NOAA satellite images over the Katabatic wind zone, Antarctica

In the katabatic wind zone in Antarctica, some characteristic streams are frequently observed in NOAA satellite images especially in the winter season. We call these "dark streams" in this work. These dark streams are observed to move and change location and their width slightly in a series of succesive scenes of NOAA images; however, distributions seem to be restricted to areas of some specific topographies. We measured air temperature and wind speed at one point by means of one of our AWS (Automated Weather Station) system. Air temperature was not particularly low and remained steady, and wind speed was constantly high, 13m/s or more. TBB analyzed from NOAA AVHRR may provide surface temperatures which are thought to be proportional to the air temperature which is equalized to emittance temperature of the blowing and drifting snow particles. On the basis of these data, air temperature inside the stream was 15℃ or higher than that outside. Along the central line of the stream, air temperature was analyzed to vary with height at the dry adiabatic lapse rate. From these observational results it may be considered that these dark stream images are composed of a warmer air stream compared with that of the outside and a strongly forced downward current along the slope