Thermogravimetric analysis of some characteristics in heating and oxidation process of coal
wang yunhe~(1; 2); liang dong~(1*); wang cheng-wei~1; xiao shu-heng~1; yu bing~3; chen yan-kuan~4(1.school of engineering; sun yat-sen university; guangzhou 510275; china; 2.school of civil engineering; guangzhou university; guangzhou 510006; china; 3.datong coal mine group; datong 037003; china; 4.xiaoming coal mine; tiefa coal mine group; tiefa 112700; china)
..............page:65-68
Natural radioactivity level of some building materials in Guangzhou
song gang~1; zhang bo-you~2; wei yong-zuo~3; chen di-yun~1; yin zhao-hui~4(1.school of environmantal science and engineering; guangzhou university; guangzhou 510006; china; 2.key laboratory of isotope geochronology and geochemistry; guangzhou institute of geochemistry; cas; guangzhou 510640; china; 3.tianhe construction quality security of guangzhou; guangzhou 510655; china; 4.the no.7 middle school of taojiang; hunan; taojiang 413400; china)
..............page:60-64