The atomic units are a system of natural units of measurement that is especially convenient for calculations in atomic physics and related scientific fields, such as computational chemistry …

The dalton or unified atomic mass unit (symbols: Da or u, respectively) is a unit of mass defined as ⁠ 1 / 12 ⁠ of the mass of an unbound neutral atom of carbon-12 in its nuclear and electronic …

原子质量单位（amu或u）有时称统一原子质量单位，或 道尔顿 （Dalton，Da，D）是用来衡量原子或分子质量的单位，它被定义为碳12原子质量的1/12。 1 u = 1/NA 克 = 1/ (1000 NA) 千克 …

United States customary units form a system of measurement units commonly used in the United States and most U.S. territories [1] since being standardized and adopted in 1832. [2] The …

2020年6月18日 · 把酶活力U看成和units(u)一样，ml和mg看成1ml水和1mg水的关系，不知道这样可以吗，刚好在做 发酵设计 的 物料衡算 ，我也遇到了你这个问题，百度了好久，我觉得我只 …

The dalton or unified atomic mass unit, abbreviated as u, amu or Da) is a unit of measurement for measuring the mass of atoms, equalling ¹⁄₁₂ of the mass of the carbon-12 isotope, the most …

2004年10月5日 · a unit of distance used to measure the height of the standard racks in which audio, video, or computer components are mounted. 1U is equal to 1.75 inches (44.45 …

2025年1月5日 · In chemistry, "u" is a common abbreviation used to represent a variety of units of measurement. In particular, it stands for uncupoise , which is a unit of mass. The term "u" is …

通过这种生物测定测试，将具有一定生物功效的最小效价单位称为“单位”（u）；国际共识指定的标准单位称为“国际单位”（IU）。 对于尚未建立国际标准的国家药品，可以制定国家标准。 “单 …

2008年12月1日 · The unified atomic mass unit (unit symbol: u) is a non-SI unit of mass, defined as one-twelfth the mass of a single 12 C atom in its ground state.