Dear Dr. Alaa Kareem Niamah, I have used a glass jar with a candle but it was overgrown by fungus after 24 hours incubation. It happened for many times. Is there any other alternative way? thank you.
1: For a Lab-made anaerobic jar, first of all you need to confirm the anaerobiosis. I used Methylene blue (1%) with a candle for confirmation of anaerobic environment inside the jar; where methylene blue turns colourless if your Jar is completely anaerobic and remains light blue if there are any O2 traces left. I would suggest to use a glass jar (5 mm thickness, 1 L) with an airtight head.
2: You can also use the FTM (fluid thioglycollate medium) to check the oxygen demand of the strains. I used screw tights glass Vials for the said purpose and got very clear results. The strict anaerobes grows a the bottom of the FTM culture Vials only.
2. For the FTM, if I keep some portion of the test tube empty as we usually do, is it required to remove air from the empty space above the media in the tube?
2: You can purge it with N2 gas to ensure anaerobiosis for long period if your culture needs more time than usual i-e more than 96 hours. As FTM has redox indicator in the recipe, so you can clearly differentiate between aerobic and anaerobic regions inside the culture tube (pink colour region = oxygen presence).
I hope this helps you find the way to achieve your desired goals.
Please let me know if you need any further information.