The alpha-case formation reactions between Ti and investment molds （Al-2O-3,ZrSiO-4,ZrO-2,CaO stabilized ZrO-2） were evaluated in a plasma arc melting furnace.Regardless of thermodynamic approaches,there were distin...The alpha-case formation reactions between Ti and investment molds （Al-2O-3,ZrSiO-4,ZrO-2,CaO stabilized ZrO-2） were evaluated in a plasma arc melting furnace.Regardless of thermodynamic approaches,there were distinct alpha-case formations.The reaction products were characterized by electron probe micro-analysis and transmission electron microscopy.Theα-case generation between Ti and Al-2O-3 mold was not able to be explained by the conventionalα-case formation mechanism,which is known to be formed by the interstitials,especially oxygen dissolved from mold materials.However,from our experimental results and thermodynamic calculations,it was confirmed that theα-case is formed not only by an interstitial element but also by substitutional metallic elements dissolved from mold materials.Our newly establishedα-case formation mechanism will surely lead to a variety of significant applications of theα-case controlled Ti casting.展开更多
BACKGROUND The aim of the present study was to examine the clinical characteristics of hepatoid adenocarcinoma of the stomach (HAS) and its diagnosis,treatment,and prognosis.CASE SUMMARY A retrospective analysis of 13...BACKGROUND The aim of the present study was to examine the clinical characteristics of hepatoid adenocarcinoma of the stomach (HAS) and its diagnosis,treatment,and prognosis.CASE SUMMARY A retrospective analysis of 13 HAS cases was performed.The mean age of the 13patients was 66.08 years,and 10 of the 13 patients were male.Prior to treatment,the alpha-fetoprotein levels in the serum were elevated in 7 patients,the tumour was located in the distal or gastric body in 11 patients,and the gastroscopy pathological results showed that 3 patients had poorly differentiated tumours and that 8 patients had moderately/poorly differentiated tumours.Abdominal CT scans showed local stomach wall thickening,and enlarged lymph nodes were visible around the stomach in 8 patients.Of the 13 patients,11 underwent radical surgery.The clinical pathological staging was as follows:Stage Ⅱ in 2 cases;stage Ⅲ in 8 cases;and stage Ⅳ in 1 case.A total of 3 patients were lost to follow-up.Otherwise,as of the last follow-up,3 patients had survived for 56 mo,and the other 7 patients failed to achieve long-term survival (survival period of 1-56 mo).CONCLUSION HAS is a special type of gastric cancer,and the prognosis of HAS has improved compared with past prognoses.Measurement of alpha-fetoprotein,early diagnosis,active surgical treatment,and application of new diagnostic and treatment techniques are conducive to improving the prognosis of HAS.展开更多
文摘The alpha-case formation reactions between Ti and investment molds （Al-2O-3,ZrSiO-4,ZrO-2,CaO stabilized ZrO-2） were evaluated in a plasma arc melting furnace.Regardless of thermodynamic approaches,there were distinct alpha-case formations.The reaction products were characterized by electron probe micro-analysis and transmission electron microscopy.Theα-case generation between Ti and Al-2O-3 mold was not able to be explained by the conventionalα-case formation mechanism,which is known to be formed by the interstitials,especially oxygen dissolved from mold materials.However,from our experimental results and thermodynamic calculations,it was confirmed that theα-case is formed not only by an interstitial element but also by substitutional metallic elements dissolved from mold materials.Our newly establishedα-case formation mechanism will surely lead to a variety of significant applications of theα-case controlled Ti casting.
文摘BACKGROUND The aim of the present study was to examine the clinical characteristics of hepatoid adenocarcinoma of the stomach (HAS) and its diagnosis,treatment,and prognosis.CASE SUMMARY A retrospective analysis of 13 HAS cases was performed.The mean age of the 13patients was 66.08 years,and 10 of the 13 patients were male.Prior to treatment,the alpha-fetoprotein levels in the serum were elevated in 7 patients,the tumour was located in the distal or gastric body in 11 patients,and the gastroscopy pathological results showed that 3 patients had poorly differentiated tumours and that 8 patients had moderately/poorly differentiated tumours.Abdominal CT scans showed local stomach wall thickening,and enlarged lymph nodes were visible around the stomach in 8 patients.Of the 13 patients,11 underwent radical surgery.The clinical pathological staging was as follows:Stage Ⅱ in 2 cases;stage Ⅲ in 8 cases;and stage Ⅳ in 1 case.A total of 3 patients were lost to follow-up.Otherwise,as of the last follow-up,3 patients had survived for 56 mo,and the other 7 patients failed to achieve long-term survival (survival period of 1-56 mo).CONCLUSION HAS is a special type of gastric cancer,and the prognosis of HAS has improved compared with past prognoses.Measurement of alpha-fetoprotein,early diagnosis,active surgical treatment,and application of new diagnostic and treatment techniques are conducive to improving the prognosis of HAS.
