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Recovery Method of Pyrolytic Carbon Surface after Exposure to Chlorine Trifluoride Gas

Advances in Chemical Engineering and Science 2021年第1期11卷 65-76页

作者： Masaya Hayashi Keisuke Kurashima Hitoshi Habuka Akio Ishiguro Shigeaki Ishii Yoshiaki Daigo Hideki Ito Ichiro Mizushima yoshinao takahashi Yokohama National University Hodogaya Yokohama Japan NuFlare Technology Inc. Yokohama Japan KANTO DENKA KOGYO CO. LTD. Marunouchi Chiyoda Tokyo Japan

An annealing process was developed for the practical recover of a purified py-rolytic carbon (PPyC) surface from damage, such as color change and peeling, due to fluorination during exposure to chlorine trifluoride gas at high tempera-tures for the cleaning of a silicon carbide chemical vapor deposition reactor. The PPyC surface was annealed at 900°C for 10 min in ambient nitrogen con-taining oxygen at the concentrations of 0.01% - 20%. The rainbow-like colored surface returned to the dark gray color of the original PPyC. Simultaneously, the thin peeled films disappeared. The Raman spectra showed that the PPyC surface chemical bonding returned to that of the original one. The oxygen concentration as low as 0.01% could recover the PPyC surface along with re-ducing the surface pit formation, when the combination of the exposure to chlorine trifluoride gas and the recovery was repeated.

关键词： Pyrolytic Carbon Recovery Chlorine Trifluoride Fluorine Out-Diffusion Annealing

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Mucinous phenotype and CD10 expression of primary adenocarcinoma of the small intestine

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World Journal of Gastroenterology 2015年第9期21卷 2700-2710页

作者： Reiko Kumagai Kenichi Kohashi Shunsuke takahashi Hidetaka Yamamoto Minako Hirahashi Kenichi Taguchi Kenichi Nishiyama yoshinao Oda Department of Anatomic Pathology Pathological SciencesGraduate School of Medical SciencesKyushu UniversityFukuoka 812-8582Japan Department of Pathology National Hospital Organization Kyushu Cancer CenterFukuoka 811-1395Japan Division of Pathology Japanese Red Cross Fukuoka HospitalFukuoka 815-8555Japan

AIM:To clarify the correlation with phenotypic expression,clinicopathological features,genetic alteration and microsatellite-instability status in small intestinal adenocarcinoma(SIA).METHODS:The cases of 47 patients diagnosed with primary SIAs that were surgically resected at our institution in 1975-2005 were *** reviewed clinicopathological findings(age,gender,tumor size,gross appearance,histological morphologic type,invasion depth,lymphatic permeation,venous invasion,and lymph node metastasis),and the immunohistochemical expression of MUC5 AC,MUC6,MUC2,CD10,and mismatch-repair(MMR) proteins(MLH1 and MSH2).We analyzed KRAS and BRAF gene mutations,and the microsatellite instability(MSI) *** immunohistochemical staining of CD10,MUC2,MUC5 AC and MUC6 was considered positive when distinct staining in > 5% of the adenocarcinoma cells was *** evaluate of MMR protein expression,we used adjacent normal tissue including lymphoid follicles,inflammatory cells,and stromal cells as an internal positive *** without nuclear staining in the tumor cells were considered to have lost the expression of the respective MMR ***:There were 29 males and 18 females patients(mean age 59.9 years,range:23-87 years).Tumors were located in the duodenum in 14 cases(30%),the jejunum in 21 cases(45%),and the ileumin 12 cases(25%).A phenotypic expression analysis revealed 20 MUC2-positive tumors(42.6%),11 MUC5AC-positive(23.4%),4 MUC6-positive(8.5%),and 7 CD10-positive(14.9%).The tumor sizes of the MUC2(+) tumors were significantly larger than those of the MUC2(-) tumors(mean,5.7 ± 1.4 cm vs 4.7 ± 2.1 cm,P < 0.05).All three tumors with adenomatous component were positive for MUC2(P < 0.05).Polypoid appearance was seen significantly more frequently in the CD10(+) group than in the CD10(-) group(P < 0.05).The tumor size was significantly larger in the CD10(+) group than in the CD10(-) group(mean,5.9 ± 1.4 cm vs 5.0 ± 2.1 cm,P < 0.05).Of 34 SIAs with succ

关键词： Small intestine Adenocarcinoma Mucin CD10 Microsat

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