硬脂酸钙,Calcium stearate;6.6-7.4% Ca basis
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铜,Copper;powder (dendritic), <45 μm, 99.7% trace metals basis
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β-半乳糖苷酶来源于大肠杆菌,β-Galactosidase from Escherichia coli [Lactase];lyophilized powder, ≥500 units/mg protein
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丙酮酸,Pyruvic acid;98%
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石油醚,Petroleum ether;puriss. p.a., reag. Ph. Eur., high boiling, bp 50-70 °C
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乙酸铵 [醋酸铵],Ammonium acetate;BioXtra, ≥98%
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乳果糖,Lactulose;Pharmaceutical Secondary Standard; Certified Reference Material