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Luda [366]
3 years ago
8

What are four characteristics of a good extraction solvent?

Biology
1 answer:
ella [17]3 years ago
4 0

A good extraction solvent should have a strong solubilizing capability for the compound of interest, it should be immiscible or only weakly misciblewith the matrix solvent ( the first solution or mixture containing the compound from its natural source, e.g., water/ether. water/ chloroform, etc. If possible the extraction solvent should be non-flammable, non-toxic or of low toxicity, reasonably volatile, and of low eco-impact. Inexpensive and available, of high purity , and shelf stable. If one is determining the compound of interest by UV/Vis spectrophotometry or fluorescence, the solvent should have extremely low absobance or emission at the wavelength of analysis

• high solubility for the solute and low solubility for the carrier liquid.

• density difference vs. the carrier liquid greater than 150 kg/m. ...

• mid-level interfacial tension (5–30 dyne/cm)

• high resistance to thermal degradation.


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Archaea are different from bacteria in that Archaea A. have structures that are more similar to bacterial structures. B. have mo
Dmitrij [34]

A i wrong because it says that they are similar.


B is wrong because archaea are phylogenetically similar to eukaryotes


C is also true because archaea are more phylogenetically similar to eukaryotes than bacteria


D is true because the Archaea did develop before Bacteria


so your answer is C because D says that archaea are different from bacteria because the archaea domain developed first, it does not say that they are dissimilar because of their appearance

5 0
3 years ago
A rock is dropped into a graduated cylinder filled with 35 mL of water what is the volume of the rock helppp
Serga [27]

Answer:

C 5 cm3

Explanation:

4 0
3 years ago
Which sequence shows the correct order of living things in a food chain?
kkurt [141]

The correct answer is option (A) leaves > deer > wolf.

A food chain is a linear sequence of organisms through which the nutrients and energy flow as one organisms feeds on the other. They show organisms starting from the producers and end with consumers or sometimes with detrivores or decomposers. Each level of the food chain is called the trophic level. The producers which use solar energy and prepare their food occupy the first trophic level, followed by the primary, secondary, tertiary, quaternary consumers occupying the next trophic level.

In the food chain given above, leaves > deer > wolf, deers feed on the leaves which are maximum in number comparitively, wolf feeds on the deer which are comparitively more in number than the wolves. This is the correct sequence of food chain showing the tranfer of energy and decreasing number of organisms with subsequent increase in the trophic levels.

8 0
3 years ago
Explain why cells regulate the synthesis of enzymes
Degger [83]

Answer:

Here's Why:

Explanation:

In living cells there are hundreds of different enzymes working together in a coordinated manner, and since cells neither synthesize nor break down more material than is required for normal metabolism and growth, precise enzyme regulation is required for turning metabolic reactions on and off.

8 0
4 years ago
Apakah yang dimaksud gaya ?​
daser333 [38]

Answer:

Secara umum, gaya mengacu pada tampilan atau desain keseluruhan dari suatu objek, atau metode menyelesaikan tugas...hope it helps

3 0
3 years ago
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