An innovative technology of high-voltage pulse discharge(HVPD)was proposed to investigate the comminution characteristics of galena ore.The optimal experiment parameters were determined as follows:spark gap spacing of...An innovative technology of high-voltage pulse discharge(HVPD)was proposed to investigate the comminution characteristics of galena ore.The optimal experiment parameters were determined as follows:spark gap spacing of 25 mm,pulse number of 120,and voltage of 25 k V.The mass fraction with size<0.074 mm in ground products was improved by the HVPD.Meanwhile,the relative grindability declined with the increase of the grinding time,which indicated that the superiority of HVPD was weakened.The ground products of HVPD were distributed more homogeneously than those of mechanical crushing.The liberation of breakage products was improved by 24.57%via the HVPD.Moreover,the Brunauer–Emmett–Teller(BET)specific surface area,pore volume,and average pore size were increased via the HVPD.Scanning electron microscopy(SEM)and energy-dispersive X-ray spectroscopy(EDS)analyses suggested that obvious grain-boundary breakage and several stomatal traces were observed in the HVPD products.展开更多
Objective： The aim of the study was to investigate the relationship between expressions of estrogen receptor （ER）, progesterone receptor （PR） and gender, age, tumor size, lymph node metastasis, capsular invasion ...Objective： The aim of the study was to investigate the relationship between expressions of estrogen receptor （ER）, progesterone receptor （PR） and gender, age, tumor size, lymph node metastasis, capsular invasion and histological type of differentiated thyroid carcinoma （DTC）. Methods： Seventy cases of DTC who received surgery in our hospital （No. 401 Hospital of People＇s Liberation Army, Qingdao, China） between January 2008 and December 2011 were selected. Among them, 61 cases were papillary carcinoma and 9 cases were follicular carcinoma. Twenty cases were normal thyroid tissue adjacent to the tumor which was used as control. Immunohistochemical SP method was employed to detect the expression of ER and PR. Results： The positive rates of ER and PR in tumor tissues of DTC patients were 21.4% （15/70） and 31.4% （22/70）, respectively, and no expression of ER or PR were founded in normal thyroid tissue （P 〈 0.01）. The expressions of ER and PR were related to the lymph node metastasis and capsular invasion （X2 = 16.913 and 6.327, P 〈 0.05; x2 = 7.516 and 12.727, P 〈 0.05）. No relationship was observed between the expressions of EPJPR and gender, age, and histological type （P 〉 0.05） of DTC patients. Conclusion： The expression levels of ER and PR in the tumor tissue of DTC patients were higher than those in the normal thyroid tissue nearby the tumor. Therefore, ER and PR expression might be clinical markers for DTC and its prognosis.展开更多
基金financial supports from the National Natural Science Foundation of China(No.51974063)the Fundamental Research Funds for the Central Universities of China(No.N180104016)the China Postdoctoral Science Foundation(No.2020M670783)。
文摘An innovative technology of high-voltage pulse discharge(HVPD)was proposed to investigate the comminution characteristics of galena ore.The optimal experiment parameters were determined as follows:spark gap spacing of 25 mm,pulse number of 120,and voltage of 25 k V.The mass fraction with size<0.074 mm in ground products was improved by the HVPD.Meanwhile,the relative grindability declined with the increase of the grinding time,which indicated that the superiority of HVPD was weakened.The ground products of HVPD were distributed more homogeneously than those of mechanical crushing.The liberation of breakage products was improved by 24.57%via the HVPD.Moreover,the Brunauer–Emmett–Teller(BET)specific surface area,pore volume,and average pore size were increased via the HVPD.Scanning electron microscopy(SEM)and energy-dispersive X-ray spectroscopy(EDS)analyses suggested that obvious grain-boundary breakage and several stomatal traces were observed in the HVPD products.
文摘Objective： The aim of the study was to investigate the relationship between expressions of estrogen receptor （ER）, progesterone receptor （PR） and gender, age, tumor size, lymph node metastasis, capsular invasion and histological type of differentiated thyroid carcinoma （DTC）. Methods： Seventy cases of DTC who received surgery in our hospital （No. 401 Hospital of People＇s Liberation Army, Qingdao, China） between January 2008 and December 2011 were selected. Among them, 61 cases were papillary carcinoma and 9 cases were follicular carcinoma. Twenty cases were normal thyroid tissue adjacent to the tumor which was used as control. Immunohistochemical SP method was employed to detect the expression of ER and PR. Results： The positive rates of ER and PR in tumor tissues of DTC patients were 21.4% （15/70） and 31.4% （22/70）, respectively, and no expression of ER or PR were founded in normal thyroid tissue （P 〈 0.01）. The expressions of ER and PR were related to the lymph node metastasis and capsular invasion （X2 = 16.913 and 6.327, P 〈 0.05; x2 = 7.516 and 12.727, P 〈 0.05）. No relationship was observed between the expressions of EPJPR and gender, age, and histological type （P 〉 0.05） of DTC patients. Conclusion： The expression levels of ER and PR in the tumor tissue of DTC patients were higher than those in the normal thyroid tissue nearby the tumor. Therefore, ER and PR expression might be clinical markers for DTC and its prognosis.
