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Naoya Mizutani,Tomohiro Iwasaki,Satoru Watano,Takeshi Yanagida,Tomoji Kawai 한국물리학회 2010 Current Applied Physics Vol.10 No.3
The size of magnetite nanoparticles was controlled by means of coexistence effects of anions in the starting solution of organic solvent-free hydrothermal synthesis via coprecipitation. As the coexisting anions,lactate ion, which forms relatively stable complex with ferric ion, and sulfate ion were used. The hydrothermal synthesis was carried out at various concentrations of lactate and sulfate ions. The obtained magnetite nanoparticles were characterized by a scanning electron microscope, transmission electron microscope, powder X-ray diffractometer, dynamic light scattering particle size analyzer and superconducting quantum interference device. The formation mechanism of magnetite nanoparticles in this system was investigated based on the experimental results. The coexisting anions remarkably influenced both formation of crystalline nuclei and dispersion stabilization of formed precipitates. The particle size depended strongly on the concentration of lactate and sulfate ions. It has been clarified that lactate ion has the effect to decrease the particle size and sulfate ion promotes the particle growth. By adjusting the concentration of lactate and sulfate ions properly as the operating factor, we could control successfully the particle size from 9.5 to 38.6 nm in median size.
Sato, Masayuki,Wakamatsu, Hiroki,Arai, Masayuki,Ichino, Kenichi,Iwasaki, Kazuhiko,Asakawa, Takeshi Korea Information Processing Society 2008 Journal of information processing systems Vol.4 No.4
VLSI chips have been tested using various automatic test equipment (ATE). Although each ATE has a similar structure, the language for ATE is proprietary and it is not easy to convert a test program for use among different ATE vendors. To address this difficulty we propose a tester structure expression language, a tester language with a novel format. The developed language is called the general tester language (GTL). Developing an interpreter for each tester, the GTL program can be directly applied to the ATE without conversion. It is also possible to select a cost-effective ATE from the test program, because the program expresses the required ATE resources, such as pin counts, measurement accuracy, and memory capacity. We describe the prototype environment for the GTL and the tester selection tool. The software size of the prototype is approximately 27,800 steps and 15 manmonths were required. Using the tester selection tool, the number of man-hours required in order to select an ATE could be reduced to 1/10. A GTL program was successfully executed on actual ATE.
Optimal Timing to Assess Drain Amylase Concentration after Elective Gastrectomy
Wakahara, Tomoyuki,Kanemitsu, Kiyonori,Miura, Susumu,Tsuchida, Shinobu,Iwasaki, Takeshi,Sasako, Mitsuru The Korean Gastric Cancer Association 2021 Journal of gastric cancer Vol.21 No.1
Purpose: While the amylase concentration of the drainage fluid (dAmy) has been reported to be a predictor of postoperative pancreas-related complications (PPRC), the optimal timing for its measurement has not been fully investigated. Materials and Methods: The clinicopathological data of 387 patients who underwent elective gastrectomy for gastric cancer were reviewed. Laboratory data, including dAmy on postoperative days 1 (dAmy1) and 3 (dAmy3), and serum C-reactive protein (sCRP) concentrations on postoperative days 1 (sCRP1) and 3 (sCRP3) were compared between patients with PPRC and without PPRC. Results: Nineteen of the 387 patients (4.9%) developed PPRC. The optimal cutoff values of dAmy1, dAmy3, sCRP1, and sCRP3 were 1514 IU/L, 761 IU/L, 8.32 mg/dL, and 15.15 mg/dL, respectively. The area under the curve of dAmy1 was greater than that of dAmy3 (0.915 vs. 0.826), and that of sCRP3 was greater than that of sCRP1 (0.820 vs. 0.659). In the multivariate analysis, dAmy1 (P<0.001) and sCRP3 (P=0.004) were significant predictors of PPRC, while dAmy3 (P=0.069) and sCRP1 (P=0.831) were not. Thirteen (41.9%) of 31 patients with both dAmy1 ≥1,545 IU/L and sCRP3 ≥15.15 mg/dL had PPRC ≥Clavien-Dindo II. In contrast, among 260 patients with both dAmy1 <1,545 IU/L and sCRP3 <15.15 mg/dL, none developed PPRC. Conclusions: dAmy1 was more useful than dAmy3 in predicting PPRC. The combination of dAmy1 and sCRP3 may be a useful criterion for the removal of drains on postoperative day 3.