What is the procedure of preparing the mixture?1)Put the carrageenan solution in a 55-60 degrees Celsius water bath.2)Incubate at 55 degrees Celsius in the dark.3)Dissolved a certain amount of gelatin and carrageenan with KCl solution in water bath.4)Add a certain amount of TG enzyme to the dissolved gelatin solution while cooling.5)Mix the gelatin solution and the carrageenan solution.
A: 32154
B: 13524
C: 31452
D: 13254
A: 32154
B: 13524
C: 31452
D: 13254
C
举一反三
- Before the pin bars are dipped into the gelatin solution, the gelatin is distributed evenly around the pins.
- The gelatin solution has required _________. A: viscosity B: temperature C: moisture D: humidity
- Herschel observed that an otherwise colourless solution of _________ in water emitted a blue colour under certain circumstances.
- (1) The weak monoprotic acid HA is 2.5% dissociated in 0.10 mol·L-1solution. What is the acidity constant, Ka, of HA?(2)A certain solution of HA has a pH=2.51. What is the concentration of the solution?
- ______is an effective long-term solution to water problem.
内容
- 0
What kind of solution to China's water problem does the author suggest?
- 1
The passage mainly introduces the solution to water shortage problems.
- 2
Fehling's solution consists solution of A and B, a solution of ____, and a solution of potassium sodium copper tartrate.
- 3
Scientists are trying to find a solution to solve the problem of water shortage.
- 4
The sequence of reagents used in Gram staining is () A: Safranin solution → iodine solution → alcohol →<br/>crystal violet B: crystal violet → alcohol → iodine solution → Safranin<br/>solution C: Crystal violet → iodine solution → alcohol → Safranin<br/>solution D: Safranin solution → alcohol → crystal violet → iodine<br/>solution E: Safranin solution → crystal violet → iodine solution →<br/>alcohol