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thorium n.【化學】釷。

thorn

Thorium ore , uranium ore , or mixed ore of uranium and thorium in which the rate of content weight uranium and thorium is higher than five - ten thousandths 一釷礦物、鈾礦物或鈾釷混合之礦物,其含有鈾、釷之成份重量比在萬分之五以上者。

Trace amounts of natural radioactive materials , such as uranium , thorium and potassium with half - lives of up to one billion years , exist in soil 泥土中含有微量的鈾、釷和鉀等天然放射性物質,這些放射性同位素的半衰期可以長達10億年。

Methods for the analysis of magnesium and magnesium alloys - determination of manganese in magnesium alloys containing zirconium , rare earths , thorium and or silver photometric method 鎂和鎂合金分析方法.第10部分:含稀土元素鋯釷和

Chemical compounds and mixtures containing uranium and thorium are active in direct proportion to the amount of these metals contained in them 含鈾和釷的化合物和混合物活躍的程度與這些化合物和混合物中這兩種金屬的含量直接相關。

Uranium and thorium in physical or chemical form or the mixture of uranium and thorium , excluding the nuclear fuel indicated in article 3 二任何物理或化學形式之鈾、釷或二者之混合物;但不包括第三條所指之核子燃料在內。

Methods for chemical analysis of aluminum fluoride for industrial use - the distillation - thorium nitrate volumetric method for the determination of fluoride content 工業用氟化鋁化學分析方法蒸餾-硝酸釷容量法測定氟量

Standard test method for analysis of total and isotopic uranium and total thorium in soils by inductively coupled plasma - mass spectrometry 通過感應耦合等離子體度譜數對土壤中總的和同位素鈾及總釷分析的標準試驗方法

I found in this way that of the other elements known , only the cornpounds of thorium behave like the compounds of uranium 于是我發現在其他所有已知元素中,只有針化合物才有像鈾化合物一樣的特性。

I measured the activity of a number of minerals ; all of then ~ that appear to be radioactive always contain uranium or thorium 我測量了一些礦物的活性,所有顯示放射性的物質均含有鈾和針。

Methods for chemical analysis of sodium fluoride - the distillation nitric thorium volumetric method for determination of fluorine content 氟化鈉化學分析方法蒸餾硝酸釷容量法測定氟量

Standard test method for analysis of uranium and thorium in soils by energy dispersive x - ray fluorescence spectroscopy 用能量色散x射線熒光光譜法分析土壤中鈾和釷的標準試驗方法

Methods for chemical analysis of iron ores - the thorium nitrate volumetric method for the determination of fluorine content 鐵礦石化學分析方法硝酸釷容量法測定氟量

Methods for chemical analysis of monazite concentrates - determination of total rare earth and thorium oxide content 獨居石精礦化學分析方法稀土和釷氧化物總量的測定

The team ' s measurement of thorium revealed the overall abundance pattern of heavy elements for this object 該隊的測量發現釷的總體格局豐富的重元素,為這個目的

Neutron fluence measurement - part 6 : fast - neutron fluence determination with thorium fission detectors 中子注量測量.第6部分:用釷裂變探測器測定快中子注量

Methods for chemical analysis of rare earth chloride and carbonate - determination of thorium oxide content 氯化稀土碳酸稀土化學分析方法氧化釷量的測定

Thorium shells are now green at 300 engineering ( was orange at 300 eng . before this patch ) 瑟銀彈現在是綠色的,在300工程看,是綠色的(以前是橙色的

Regulations for safe management of radioactive wastes from the mining and milling of uranium and thorium ores 鈾釷礦冶放射性廢物安全管理技術規定

Methods for chemical analysis of monazite concentrates - determination of thorium oxide content 獨居石精礦化學分析方法氧化釷量的測定