In May 2018,the primetime news casted a shocking report saying that radon concentration on a certain model of bed mattress found to be as high as 2200 Bq/m3.After a humble,the Nuclear Safety and Security Commission(NS...In May 2018,the primetime news casted a shocking report saying that radon concentration on a certain model of bed mattress found to be as high as 2200 Bq/m3.After a humble,the Nuclear Safety and Security Commission(NSSC)of Korea confirmed that significant amount of thoron gas is emanated from several mattress models marketed by a company claiming beneficial health effects of negative ions.Laboratory analysis showed that some internal fabric sheets of those mattresses contain high concentration of Th-232.It was revealed that the manufacture treated the material with so-called‘negative ion powder’procured from the market and NSSC found that its radioactive content is the monazite powder.Although measurements with reliable instruments resulted in somewhat lower values,the tentative but conservative estimates of doses to the users are still remarkable,ranging from a few to 14 mSv a year.Most of the affected models have been marketed from 2010 but earlier models,with lower thorium content,were supplied from 2006.As many as 88,000 mattresses have been produced.The manufacturer with help of the government,recalled all the affected models and separated the radioactive internals.A large amount of waste is waiting for the government decision on disposal method.Similar problems were identified in other consumer products including latex mattresses and pillows imported,hot pads,and several models of sanitary or health-aid goods.These episodes called for revisiting NORM control strategy in Korea.展开更多
The China Consumers' Association (CCA) confirmed in late July that it has ended its "3-15" certification program for consumer-friendly prod- ucts, and companies that had been certified will have to stop ...The China Consumers' Association (CCA) confirmed in late July that it has ended its "3-15" certification program for consumer-friendly prod- ucts, and companies that had been certified will have to stop using the designation after their agreement with the CCA expires.展开更多
Natural dyes taken from the barks of the tree Caesalpinia sappan has been used in many consumer products.Hence it is imperative to test the toxicity of this dye.In the present study an investigation was conducted to f...Natural dyes taken from the barks of the tree Caesalpinia sappan has been used in many consumer products.Hence it is imperative to test the toxicity of this dye.In the present study an investigation was conducted to find out the toxic effect of aqueous extract of the dye C.sappan in test animal Wister albino rats.Acute oral toxicity showed no clinical signs of toxicity and no mortality even at a dose level of 100–2000 mg/kg in 14 days observation period.When a dose level above 2500 mg/kg was given for 28 days,no death was noticed up to the dose level 5000 mg/kg body weight.The weight of the tested rats was not significantly reduced,when compared with the control group.The organ-body weight ratio of kidney,liver and abdomen did not change when compared to the control group in the observation period.The less toxicity of the dyes of C.sappan.展开更多
文摘In May 2018,the primetime news casted a shocking report saying that radon concentration on a certain model of bed mattress found to be as high as 2200 Bq/m3.After a humble,the Nuclear Safety and Security Commission(NSSC)of Korea confirmed that significant amount of thoron gas is emanated from several mattress models marketed by a company claiming beneficial health effects of negative ions.Laboratory analysis showed that some internal fabric sheets of those mattresses contain high concentration of Th-232.It was revealed that the manufacture treated the material with so-called‘negative ion powder’procured from the market and NSSC found that its radioactive content is the monazite powder.Although measurements with reliable instruments resulted in somewhat lower values,the tentative but conservative estimates of doses to the users are still remarkable,ranging from a few to 14 mSv a year.Most of the affected models have been marketed from 2010 but earlier models,with lower thorium content,were supplied from 2006.As many as 88,000 mattresses have been produced.The manufacturer with help of the government,recalled all the affected models and separated the radioactive internals.A large amount of waste is waiting for the government decision on disposal method.Similar problems were identified in other consumer products including latex mattresses and pillows imported,hot pads,and several models of sanitary or health-aid goods.These episodes called for revisiting NORM control strategy in Korea.
文摘The China Consumers' Association (CCA) confirmed in late July that it has ended its "3-15" certification program for consumer-friendly prod- ucts, and companies that had been certified will have to stop using the designation after their agreement with the CCA expires.
文摘Natural dyes taken from the barks of the tree Caesalpinia sappan has been used in many consumer products.Hence it is imperative to test the toxicity of this dye.In the present study an investigation was conducted to find out the toxic effect of aqueous extract of the dye C.sappan in test animal Wister albino rats.Acute oral toxicity showed no clinical signs of toxicity and no mortality even at a dose level of 100–2000 mg/kg in 14 days observation period.When a dose level above 2500 mg/kg was given for 28 days,no death was noticed up to the dose level 5000 mg/kg body weight.The weight of the tested rats was not significantly reduced,when compared with the control group.The organ-body weight ratio of kidney,liver and abdomen did not change when compared to the control group in the observation period.The less toxicity of the dyes of C.sappan.
