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lord [1]
2 years ago
14

Photodecomposition, photomutagenicity and photocytotoxicity of retinyl palmitate under He-Ne laser photoirradiation and its effe

cts on photodynamic therapy of cancer cells in vitro
Biology
1 answer:
Semmy [17]2 years ago
7 0

The effects on photodynamic therapy of cancer cells in vitro is that retinyl palmitate (RP) can be used 24 h before PDT to enhance its effects. RP is not mutagenic under irradiation with He–Ne laser.

HeLa cells with or without RP (retinyl palmitate) that was incubated with the cells for a short or long incubation period prior to PDT are typically used to test the effects of PDT (photodynamic therapy) using hematoporphyrin derivatives (HpD) as photosensitizer under He-Ne laser irradiation.

No photodecomposition of RP alone is visible, but a small amount is seen of in the presence of HpD under He-Ne laser irradiation is seen. No photomutagenicity is often seen under laser irradiation. HeLa cell viability can be dramatically reduced by RP alone. A 24 hour incubation period before PDT increased the cytotoxicity of PDT on HeLa cells.

Therefore, retinyl palmitate (RP) can be used 24 h before PDT to enhance its effects. RP is not mutagenic under irradiation with He–Ne laser.

Learn more about retinyl palmitate here:

brainly.com/question/24051570

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Because cell walls consist of a cross-linked network of long filaments embedded in a stiff surrounding material, they can be cal
Contact [7]

According to the research, the correct answer is fiber composites. Because cell walls consist of a cross-linked network of long filaments embedded in a stiff surrounding material, they can be called fiber composites.

<h3>What are cell walls?</h3>

It is a network that covers prokaryotic cells and plant cells that is located outside the plasma membrane, helping to form the structure.

In this sense, since it is made up of a network of carbohydrates, phospholipids and structural proteins, and the different cell types of plants can be identified by their characteristics, they can be called fiber composites.

Therefore, we can conclude that cell walls are a network embedded in a matrix composed of carbohydrates and proteins.

Learn more about cell walls here: brainly.com/question/965751

#SPJ1

8 0
1 year ago
There is little variety among organisms found in pools, ponds, and lakes.
aniked [119]
That's true. There is little variety among organisms found in pools, pounds and lakes. Despite that fact that many ponds are seasonal, lasting just a couple of month (for exemple sessile pools) while lakes can exist for more than hundred years. Lakes and ponds have limited species diversity because they are often limited from each other and from other water sources like rivers, seas and oceans. 
3 0
3 years ago
Read 2 more answers
Why are marsupials only found in Australia?
Vsevolod [243]

Answer:

B. Australia is isolated

Explanation:

They originated in South America and spread throughout the world, but due to competition on other continents, the other marsupials died out, while the ones on Australia lived.

5 0
3 years ago
Read 2 more answers
What is the difference between Deforestation and reforestation?
Ilya [14]

Answer:

deforestation is when an area of trees is cleared. reforestation is when a bunch of trees are planted and grown to revive what once was an area of trees.

7 0
3 years ago
Many prokaryotes reproduce through binary fission. The circular DNA is
Soloha48 [4]

Answer:

D

Explanation:

Mitosis is a form of reproduction in simple living organisms. The outcome of mitosis is two identical daughter cells, and it follows the process described in the prompt. It doesn't require genetic material from another organism, so it's asexual reproduction.

7 0
3 years ago
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