Heavy metal ions and arsenic compounds inhibit enzyme as follows
A.Mercaptosylase
B.Cholinesterase
C.Carboxylase
D.Phosphatase
- · 有6位网友选择 B,占比66.67%
- · 有2位网友选择 A,占比22.22%
- · 有1位网友选择 C,占比11.11%
A.Mercaptosylase
B.Cholinesterase
C.Carboxylase
D.Phosphatase
A.Mercaptosylase 巯基酶
B.Cholinesterase 胆碱酯酶
C.Carboxylase 羧化酶
D.Phosphatase 磷酸酶
A、Exchangeable metal ions are removed by extraction with neutral ammonium acetate solution;
B、the carbonate fraction extracted using sodium acetate and acetic acid at pH 5;
C、metal ions bound to oxides are removed by reducing these oxides and solubilising the resultant ferrous and manganous species using hydroxylamine and acetic acid;
D、oxidation of organic matter is achieved using hydrogen peroxide in an acidic medium and the final residue metal fraction solubilised by an HF-HClO4 acid digest.
Which of the following types of heavy metal music is believed NOT to be very wholesome?
A.Speed metal.
B.Death metal.
C.Thrash metal.
D.Light metal.
A.drew in
B.drew on
C.drew up
D.drew out
A、heating
B、strong acid / alkali
C、heavy metal ion
D、urea
E、freezing
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