During 1991-1993,the activity levels of the bone-coal mines were investigated in Zhejiang,Hubei,Hunan,Jiangxi and Anhui Province,respectively,where the reserve of bone-coal is about 90% of our country’s total reserve...During 1991-1993,the activity levels of the bone-coal mines were investigated in Zhejiang,Hubei,Hunan,Jiangxi and Anhui Province,respectively,where the reserve of bone-coal is about 90% of our country’s total reserve.The average of γ radiation doserate level measured for bone-coal,bone-coal cinder(BCC) and bone-coal cinder brick(BCCB) in these provinces is about 500 nGy/h,400 nGy/h and 700 nGy/h respectively,while that for fields,roads and houses made of BCCB in corresponding regions of these provinces is about 200 nGy/h,260 nGy/h and 300 nGy/h respectively.It is shown that the environmental activity level of bone-coal mining area is about 3 times higher than the reference spots.展开更多
It was investigated that the radon concentrations in bone-coal mining areas,in outside and inside BCCB houses and ordinary red-brick (ORB) houses of the reference points in Hubei,Hunan,Jiangxi,Zhejiang and Anhui Provi...It was investigated that the radon concentrations in bone-coal mining areas,in outside and inside BCCB houses and ordinary red-brick (ORB) houses of the reference points in Hubei,Hunan,Jiangxi,Zhejiang and Anhui Provinces. It was shown that the average annual radon concentration inside BCCB houses in the bone-coal mining areas in the five provinces ranges from 85.7 to 303 Bq/m3,with an average of 151 Bq/m3,which is 3 times that inside ORB houses at the reference points. The average annual radon concentration outside BCCB houses in the bone-coal mining areas in the five provinces ranges from 12.0 to 73.8 Bq/m3,with an average of 34.9 Bq/m3,which is 1.5 times that outside ordinary ORB at the reference points. And the radon concentration in shafts of Hubei and Zhejiang Prov- ince is 9.51×103 Bq/m3 and 965 Bq/m3,respectively. This report also shows the changing patterns of radon concen- trations with day,season,height,etc.展开更多
目的检测肠易激综合征大鼠肠道菌群及体内氨基酸的变化,探索应激致肠易激综合征的发生机制。方法采用母婴分离应激的方法建立肠易激综合征动物模型,收集大鼠的粪便和血清。采用高通量测序技术对粪便样本中所有细菌16S r DNA的V3、V4和V...目的检测肠易激综合征大鼠肠道菌群及体内氨基酸的变化,探索应激致肠易激综合征的发生机制。方法采用母婴分离应激的方法建立肠易激综合征动物模型,收集大鼠的粪便和血清。采用高通量测序技术对粪便样本中所有细菌16S r DNA的V3、V4和V6区进行测序,并进行菌群的生物信息学分析。采用全自动氨基酸分析仪检测分析大鼠粪便和血清样本的20种常见氨基酸含量。结果与正常大鼠相比,肠易激综合征大鼠肠道菌群的Shannon指数下降,表明菌群多样性有所下降。肠易激综合征大鼠的毛螺菌科、克里斯滕森菌科、单形拟杆菌、δ变形菌纲以及脱硫弧菌目、脱硫弧菌科和脱硫弧菌属的相对丰度均显著升高。同时,肠易激综合征大鼠粪便中的苏氨酸、丝氨酸、蛋氨酸、赖氨酸和脯氨酸浓度显著增高,血清中蛋氨酸、脯氨酸和苯丙氨酸浓度显著升高,甘氨酸和赖氨酸浓度则显著下降。结论应激引起肠道菌群失调以及氨基酸代谢异常,该变化可能与慢性应激导致的肠易激综合征有关。展开更多
基金Supported by State Environment Protection Bureau and Chinese Nuclear Industry Corporation (Project No.90201001)
文摘During 1991-1993,the activity levels of the bone-coal mines were investigated in Zhejiang,Hubei,Hunan,Jiangxi and Anhui Province,respectively,where the reserve of bone-coal is about 90% of our country’s total reserve.The average of γ radiation doserate level measured for bone-coal,bone-coal cinder(BCC) and bone-coal cinder brick(BCCB) in these provinces is about 500 nGy/h,400 nGy/h and 700 nGy/h respectively,while that for fields,roads and houses made of BCCB in corresponding regions of these provinces is about 200 nGy/h,260 nGy/h and 300 nGy/h respectively.It is shown that the environmental activity level of bone-coal mining area is about 3 times higher than the reference spots.
基金Supported by State Environment Protection Bureau and Chinese Nuclear Industry Corporation (Project No.90201001)
文摘It was investigated that the radon concentrations in bone-coal mining areas,in outside and inside BCCB houses and ordinary red-brick (ORB) houses of the reference points in Hubei,Hunan,Jiangxi,Zhejiang and Anhui Provinces. It was shown that the average annual radon concentration inside BCCB houses in the bone-coal mining areas in the five provinces ranges from 85.7 to 303 Bq/m3,with an average of 151 Bq/m3,which is 3 times that inside ORB houses at the reference points. The average annual radon concentration outside BCCB houses in the bone-coal mining areas in the five provinces ranges from 12.0 to 73.8 Bq/m3,with an average of 34.9 Bq/m3,which is 1.5 times that outside ordinary ORB at the reference points. And the radon concentration in shafts of Hubei and Zhejiang Prov- ince is 9.51×103 Bq/m3 and 965 Bq/m3,respectively. This report also shows the changing patterns of radon concen- trations with day,season,height,etc.
文摘目的检测肠易激综合征大鼠肠道菌群及体内氨基酸的变化,探索应激致肠易激综合征的发生机制。方法采用母婴分离应激的方法建立肠易激综合征动物模型,收集大鼠的粪便和血清。采用高通量测序技术对粪便样本中所有细菌16S r DNA的V3、V4和V6区进行测序,并进行菌群的生物信息学分析。采用全自动氨基酸分析仪检测分析大鼠粪便和血清样本的20种常见氨基酸含量。结果与正常大鼠相比,肠易激综合征大鼠肠道菌群的Shannon指数下降,表明菌群多样性有所下降。肠易激综合征大鼠的毛螺菌科、克里斯滕森菌科、单形拟杆菌、δ变形菌纲以及脱硫弧菌目、脱硫弧菌科和脱硫弧菌属的相对丰度均显著升高。同时,肠易激综合征大鼠粪便中的苏氨酸、丝氨酸、蛋氨酸、赖氨酸和脯氨酸浓度显著增高,血清中蛋氨酸、脯氨酸和苯丙氨酸浓度显著升高,甘氨酸和赖氨酸浓度则显著下降。结论应激引起肠道菌群失调以及氨基酸代谢异常,该变化可能与慢性应激导致的肠易激综合征有关。
