Coumarin
compounds can be extracted by the following methods except __.
A: Solvent extraction
B: Maceration with cold water
C: Extract with alkaline and precipited with acid
D: Steam Distillation
E: Sublimation
compounds can be extracted by the following methods except __.
A: Solvent extraction
B: Maceration with cold water
C: Extract with alkaline and precipited with acid
D: Steam Distillation
E: Sublimation
B
举一反三
- Which of the following methods do not belong to solvent extraction? () A: Simultaneous distillation and extraction; B: Solvent assisted flavor evaporation; C: Solid phase microextraction; D: Direct solvent extraction
- Which<br/>of the following techniques is not commonly used for taste compounds<br/>extraction? () A: Solvent extraction; B: Headspace extraction; C: Ultrafiltration; D: Ultrasonic technique
- The purification methods commonly used in the analysis of traditional<br/>Chinese medicine preparations include ( ) A: Liquid-liquid extraction B: chromatography C: precipitation method D: distillation
- Ionic compounds have the following properties except for ________. A: have high melting and boiling points. B: are soluble in water C: can conduct electricity D: shatter easily
- 检索有关extraction、extract、extracting、extracted的英文文献，以下最合适的截词为（ ）。
内容
- 0
Water engineering can be used in the following ways except _________.
- 1
Kate drinks cold water except with tea.
- 2
Which<br/>of following is the best choice for storage of extracted DNA<br/>sample:____ A: ultrapure<br/>water B: TE<br/>buffer C: 75%<br/>ethanol D: TBE<br/>buffer
- 3
The methods of multi-focus image extraction are as follows A: spatialdomain methods B: transform domain methods C: Binarization method D: Segmentation and extraction method
- 4
The following metabolites are involved in both the TCA cycle and the glyoxylate cycle except: A: citric acid B: succinate acid C: fumaric acid D: malic acid