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LDM MediumLDM Medium Modification of Lewin's marine diatom medium. Directions For 1 L Total To approximately 950 mL of seawater (30 ppt), add each of the components in the order specified (except vitamins) while stirring continuously. Bring total volume to 1 L with non pasteurized seawater. For 1. 5% (w v) agar medium, add 15 g of agar into the flask; do not mix. Cover and autoclave medium. When cooled add sterile vitamins. For agar medium add vitamins, mix,
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LDM Medium

Modification of Lewin's marine diatom medium.

Directions

For 1 L Total
  1. To approximately 950 mL of seawater (30 ppt), add each of the components in the order specified (except vitamins) while stirring continuously.
  2. Bring total volume to 1 L with non-pasteurized seawater.
    • For 1.5% (w/v) agar medium, add 15 g of agar into the flask; do not mix.
  3. Cover and autoclave medium.
  4. When cooled add sterile vitamins.
    • For agar medium add vitamins, mix, and dispense before agar solidifies.
  5. Store at refrigerator temperature.

# Component Amount Stock Solution Concentration Final Concentration
1 Seawater (30 ppt) 950 mL
2 NaNO3
(Fisher BP360-500)
1 mL/L 10 g/400mL dH2O 0.29 mM
3 CaCl22H2O
(Sigma C-3881)
1 mL/L 1 g/400mL dH2O 0.017 mM
4 MgSO47H2O
(Sigma 230391)
1 mL/L 3 g/400mL dH2O 0.03 mM
5 K2HPO4
(Sigma P 3786)
1 mL/L 3 g/400mL dH2O 0.043 mM
6 KH2PO4
(Sigma P 0662)
1 mL/L 7 g/400mL dH2O 0.129 mM
7 NaCl
(Fisher S271-500)
1 mL/L 1 g/400mL dH2O 0.043 mM
8 P-IV Metal Solution 6 mL/L
9 Tryptone
(Sigma T 9410)
1 g/L
10 Vitamin B12 1 mL/L
11 Biotin Vitamin Solution 1 mL/L

LDM Medium

Item no : 19842767897
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