培养基对微生物腐蚀的影响

吕美英, 李振欣, 杜敏, 万紫轩

Effect of Culture Medium on Microbiologically Influenced Corrosion

LV Meiying, LI Zhenxin, DU Min, WAN Zixuan

表1 主要营养元素的来源与功能

Table 1 Source and function of main nutrients

Nutrient element Common source Physiological function C Glucose, sucrose, starch, beef extract, etc. It constitutes the cellular material of microorganisms, the skeleton of organic macromolecules, and provides energy for life activities N Yeast extract, beef extract, peptone, urea, ammonium salt, etc. It is the main element that constitutes proteins, nucleic acids, etc. In addition, ammonium and nitrate can also be used as energy sources for some bacteria P KH2PO4, K2HPO4 It is the key component of nucleic acid, nuclear protein and many coenzymes; Moreover, phosphate is an important buffer in cells S (NH4)2SO4, MgSO4 It is the component of sulfur-containing amino acids (cystine, cysteine, methionine, etc.) and sulfur-containing vitamins (biotin, thiamine, etc.); Sulfur and sulfides are also sources of energy for some autotrophic microorganisms K KH2PO4, K2HPO4 It is the cofactor of some enzymes (fructokinase, phosphopyruvate transphosphatase, etc.); It is also involved in the composition of the intracellular material transport system, and regulates membrane permeability, potential difference, and osmotic pressure Na NaCl, NaNO3 It can maintain osmotic pressure; It is essential for some bacteria and cyanobacteria Ca Ca(NO3)2, CaCl2 It is the stabilizer of some extracellular enzymes and the cofactor of proteases; It can also regulate the colloidal state in cells and reduce the permeability of the cell membrane Mg MgSO4 It is the cofactor of nitrogenase and the component of chlorophyll; It can also stabilize ribosomes and cytoplasmic membranes Fe FeSO4 It can constitute cytochrome, chlorophyll and some enzymes involved in the electron transfer process