Plastic Container Diy For Rabbit

A spill of a compound X in soil. This product percolates to deeper layers and anaerobic conditions. Through a series of tastings is observed as the compound is disappearing and turning into other products due to the action of microorganisms in the soil. We also analyzed other compounds present in the soil, such as sulfates and carbonates. Below is a graph with those compounds that have been analyzed over time.

1 - What type of microorganisms degrade the compound X in the first three weeks? Explain why you think it's that kind of microorganisms. Name some kind.

2 - What kind or type of microorganisms appears from the third week? Explain why you think it's the genre or type.

3 - Why is the sulfate concentration curve is biphasic?

(Note: This issue was included in the 2 nd part of the subject of ongoing Environmental Microbiology 2008-9 as to allow a wider range of responses was not defined whether the compound X was organic or inorganic)

Hunter Wellingtons Ontario Canada

Aspergillus niger and citrate

The following issues are a topic of library research. Not a practical problem in itself.

In 1915, Italy decided to enter the First World War. Involvement in the conflict meant that a large part of the agricultural labor force available to be consumed on the front lines. One of the many consequences was that the citrus crop was spoiled in full, which caused a drop in industrial production of citric acid. And citric acid is one of the essential compounds of the modern chemical industry. So all the world's scientists went looking for an alternative source of these molecules.

was the American chemist James Currie who won the award in 1917. Discovered that the mold Aspergillus niger secreted large amounts of citric acid when grown in certain conditions.

Questions:

- What was so special about these conditions?

- What advantage will Citric acid is secreted to mold Aspergillus niger ?

- Why are there so few creatures that can take advantage of citric acid as a carbon source?