Weiyel Reference Materials
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| Subculture | Nutritional gravy medium (English name: NA/NB): beef paste 3.0g, peptone 10.0g,NaCl 5.0g, agar 20.0g (not included in liquid medium), distilled water 1.0L,pH 7.0. Sterilization at 121 ℃ for 15min. [Note] Adding 5 mgMnSO4 · H2O to culture Bacillus is beneficial to produce spores. |
| Subculturing | When using the essential control product, it should be moved to room temperature (20~25 ℃) for 10 minutes, dissolved with 1mL of sterile water or sterile physiological saline, with a minimum sampling amount of 200uL, a concentration value of 108 ~ 109PFU/mL, and a reference concentration of 1.3 × 108PFU/mL. |
| Storage conditions | -20 ℃ |
| Safety level | 1 |
| Application | The E. coli phage T7 quantitative standard quality control, through the cultivation of E. coli host bacteria and phage T7, the collection of phage. The phage titer and lysis efficiency were determined by double-layer agar counting method, which was mainly used for phage T7 positive quality control. |
| Sharing mode | Public welfare sharing |
Standard quality control samples of heat-resistant coliform bacteria in drinking water (multi-tube fermentation method)
BNCC360414
Escherichia coli EHEC O157:H7-sfgfp green fluorescent marker strain
BNCC363779
Fecal coliform negative control sample (Membrane membrane method)
BNCC359577
Reference material of total bacterial count in food
BNCC359084
Fecal coliform standard quality control sample (Multitube fermentation method)
BNCC359289
Campylobacter jejuni subsp nucleic acid detection standard
BNCC362621