黄色小说视频-日本少妇高潮抽搐-国内自拍av-天堂中文资源在线-蜜桃视频在线入口www-91久久综合-亚洲视频在线一区-日日夜夜拍-国产精品资源在线观看-欧美激情国产精品免费-人妻少妇久久中文字幕-成人免费无码大片a毛片-香蕉污视频在线观看-日本电影成人-国内精品久久99人妻无码

1. Harvest cells from a culture that is at or near peak density by centrifugation at 800 x g for 5 min. The cells grown in a medium containing agar are concentrated by centrifugation, a solid pellet does not form. The soft pellet is resuspended to desired cell concentration with agar-free supernatant.
2. Adjust the concentration of cells to 2 x 10⁶ - 2 x 10⁷/mL in fresh medium.
3. While cells are centrifuging prepare a 10% (v/v) solution of sterile DMSO in fresh medium.

1. Add 1.0 mL of DMSO to an ice cold 20 x 150 mm screw-capped test tube;
2. Place the tube on ice and allow the DMSO to solidify (~5 min) and then add 9.0 mL of ice cold medium;
3. Invert several times to dissolve the DMSO;
4. Allow to warm to room temperature.

4. Mix the cell preparation and the DMSO in equal portions. Thus, the final concentration will be 10⁶ - 10⁷ cells/mL and 5% (v/v) DMSO. The time from the mixing of the cell preparation and DMSO stock solution before the freezing process is begun should no less than 15 min and no longer than 30 min.
5. Dispense in 0.5 mL aliquots into 1.0 - 2.0 mL sterile plastic screw-capped cryules (special plastic vials for cryopreservation).
6. Place the vials in a controlled rate freezing unit.  From room temperature cool at -1°C/min to -40°C.  If the freezing unit can compensate for the heat of fusion, maintain rate at -1°C/min through the heat of fusion.  At -40°C plunge into liquid nitrogen. Alternatively, place the vials in a Nalgene 1°C freezing apparatus.  Place the apparatus at -80°C for 1.5 to 2 hours and then plunge ampules into liquid nitrogen.  (The cooling rate in this apparatus is approximately -1°C/min.)  
7. The frozen preparations should be stored in either the vapor or liquid phase of a nitrogen refrigerator. Frozen preparations stored below -130°C are stabile indefinitely. Those stored at temperatures above -130°C are progressively less stabile as the storage temperature is elevated. Vials should not be stored above -55°C.
8. To establish a culture from the frozen state place an ampule in a water bath set at 35°C. Immerse the vial just to a level just above the surface of the frozen material. Do not agitate the vial.
9. Immediately after thawing, do not leave in the water bath, aseptically remove the contents of the ampule and inoculate a 16 x 125 mm screw-capped test tube containing either 9 mL of ATCC medium 360 (completed with serum) or 13 mL ATCC Medium 2154.
10. Incubate the culture at 35°C with the cap screwed on tightly (tube should be vertical for medium 360 or on a 15° horizontal slant for medium 2154).

Girard YA, et al. Trichomonas stableri n. sp., an agent of trichomonosis in Pacific Coast band-tailed pigeons (Patagioenas fasciata monilis). Int. J. Parasitol. Parasites Wildl 3(1): 32-40, 2013. PubMed: 24918075

Nucleotide (GenBank) : EU215367 Trichomonas sp. RWG-2007-2 isolate BTPN2 internal transcribed spacer 1, partial sequence; 5.8S ribosomal RNA gene and internal transcribed spacer 2, complete sequence; and 28S ribosomal RNA gene, partial sequence

Nucleotide (GenBank) : KC660128 Trichomonas stableri hydrogenosomal Fe-hydrogenase gene, partial cds