A porous α-alumina support tube, polished with a finely powdered
X-type zeolite for use as
seeds, was placed vertically in an autoclave containing an aqueous
mixture of water glass and
sodium aluminate. Hydrothermal synthesis was carried out at 90
°C for 24 h. A polycrystalline
layer of Y-type zeolite was thus formed on the outer surface of the
support tube. After washing
and drying in air, permeances of single components and mixtures of
CO2 and N2, as well as
CH4, C2H6, and SF6,
were determined. The CO2 permeance was higher than
that of N2 at
temperatures of 30−130 °C. When an equimolar mixture of
CO2 and N2 was fed into the feed
side, the CO2 permeance was nearly equal to that for the
single-component system and the N2
permeance for the mixture was greatly decreased, especially at lower
permeation temperatures.
This was due to selective adsorption of CO2 in
subnanometer micropores of the membrane. At
30 °C, the permeance of CO2 was higher than
10-7
mol·m-2·s-1·Pa-1,
and the permselectivity of
CO2 to N2 was 20−100.
The posterior parietal cortex is included in the dorsal cortical visual pathway underlying the three-dimensional (3-D) visual recognition of space and objects. The neurons in the lateral intraparietal area (LIP) respond visually to the three-dimensional objects, whereas those in the anterior intraparietal area (AIP) respond to hand movements to grasp them. LIP receives visual inputs from V3A, whereas AIP projects to the premotor areas; however, it is not known whether the neurons in LIP project to AIP. We herein investigated the connectional substrates that underlie the transformation of three-dimensional vision to prehensile hand movements in the Japanese monkey (Macaca fuscata). After identifying the three-dimensional visually responsive region in the posterior part of LIP by the unit recordings, we injected a bidirectional tracer, wheat germ agglutinin conjugated to horseradish peroxidase, into one of the recording sites. We found that LIP receives neuronal projections from V3A and sends axons to AIP. To confirm our findings, we injected several orthograde tracers into V3A and retrograde tracers into AIP in the same hemispheres. We found that the V3A neurons projecting to LIP terminate in the vicinity of the LIP neurons projecting to AIP. The results suggest that the cortical connections of V3A-LIP-AIP in the lateral bank of the intraparietal sulcus play an important role in the visuomotor transformation for prehensile hand movements.
The present study is the first to evaluate EUS-HGAS. EUS-HGAS has clinical benefit for obtaining long stent patency and avoiding adverse events, although the possibility of acute pancreatitis as a result of obstruction of the orifice of the pancreatic duct must be considered.
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