(1) The microorganism in fermentation tank 1 is yeast, and the microorganism in fermentation tank 2 is acetobacter. The main difference in structure is that the former has a nucleus surrounded by a nuclear membrane. To ensure the normal progress of alcoholic fermentation and acetic acid fermentation, in addition to meeting appropriate temperature, pH and other conditions, it is also necessary that alcoholic fermentation does not require the introduction of oxygen, while acetic acid fermentation requires the continuous introduction of oxygen.
(2) Based on the morphology and quantity of microorganisms in fermentation tank 1, it can be determined which type is the dominant strain. The simplest method is the direct counting method under a microscope or the dilution coating plate method. Since the microscopic counting method may include dead yeasts, the number of dominant strains obtained by this method is greater than the number of viable strains of dominant strains in fermenter 1, while the number of dominant strains obtained by using the dilution coating plate method is The number is equal to the number of viable bacteria of the dominant strain in fermentation tank 1.
(3) The first process shown in the figure is the plate streaking method, and the second process is the dilution coating plate method. If you want to separate the dominant strains from the fermentation tank 2, you should use the second process. The reason is that the second process can not only Bacterial strains can be isolated and counted.
So the answer is:
(1) A cell nucleus surrounded by a nuclear membrane (a formed nucleus)? Alcohol fermentation does not require the introduction of oxygen, while acetic acid fermentation requires continuous introduction of oxygen.
(2) Microscope direct counting method (or dilution coating plate method)? Greater than (equal to)
(3) Plate marking? Dilution coating plate method? Two? Process two Not only can bacterial strains be isolated, but they can also be counted