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Svet_ta [14]
3 years ago
9

Why is alchemy no longer accepted?

Biology
2 answers:
Elza [17]3 years ago
8 0
The answer is D. Scientists used evidence, analysis,and experiments to disprove alchemy
deff fn [24]3 years ago
8 0

Answer:

The correct answer is D. Scientists used evidence, analysis, and experiments to disprove  alchemy.

Explanation:

Alchemy was based on changing a non-precious material into a precious material like lead into gold. It was considered as magic and science before the 19th century because in the 19th-century scientist get to know about the nature of metals and the periodic table that disproved alchemy.

Alchemist said that everything is made up of soil, water, fire, and earth but after the advancement of chemistry and physics it became clear that everything is made up of atoms, and lead is also made up of atom which can not be converted into gold.

So scientist used evidence, analysis, and experiments to disprove alchemy. Therefore the correct answer is D.

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Given that polyurethane is a huge polymer (mw >>?????????,????????? daltons), why is it important that the polyurethanase
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Polyurethanase is an enzyme emitted by the microorganism so as to break polyurethane. Since the polymer is a significant wellspring of energy for the life form, it should be separated all together for etpum"s development.

Further details

Polyurethane

It is a polymer made out of organic units and carbamate links join them. While most polyurethanes are thermosetting polymers that don't liquefy when warmed, thermoplastic polyurethanes are likewise accessible. Polyurethanes are available in numerous parts of present-day life. They present a class of polymers that have discovered a far-reaching use in the medical and mechanical fields. Polyurethanes can be found in items such as furniture, coatings, cement, constructional materials, paints, elastomers, filaments and paddings. Polyurethane ought to be curtailed to PUR in consistence with authority German and International benchmarks.

Polyurethanase

It can be defined as such an enzyme which is secreted by microbes and used for the breakdown of polyurethane. In this breakdown process energy is released that is utilized by microorganisms.

Bio-degradation of Polyurethane

In spite of their microbial obstruction, polyurethane is attacked by microscopic organisms however the component to explain its bio-degradation is unknown. There are reports from microscopic organisms and parasites that are equipped for the breakdown of polyurethane yet the examinations about the proteins that assault the plastic are centered around bacterial compounds as it were. The enzyme is of sort esterase and protease for the most part since these chemicals are unspecific and can perceive a few regions in the polyurethane particle and hydrolyze it.

Answer details

Subject: Biology

Level: College

Keywords

  • Polyurethane
  • Polyurethanase
  • Bio-degradation of Polyurethane

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