Identy three advantages and three disadvantages of bioplastics

Answers

Answer 1

Explanation:

Advantages of bioplastics

1.Less oil is used to produce petrochemical (oil-based) plastics which pose a great risk to the environment.

2.The common bioplastics can be injection molded and shaped to take the same form as traditional thermoplastics. In some cases, the bioplastics are stronger and lighter, too, so they are not necessarily only suitable for very niche applications.

3.Bioplastics are more marketable, for example, their usage may improve the value-add of a product through a green marketing campaign. After all, studies have shown that ‘80% of European customers want to buy products with a minimal impact on the environment,’ so bioplastics may represent a useful argument for brands.

Disadvantages of bioplastics

1.First, bioplastics are generally NOT cost-competitive compared to their oil-based counterparts. They are generally two or three times more expensive than the major conventional plastics such as PE or PET, and their production is plagued by low yields and being expensive. This disadvantage should be less acute when manufacturing plants become larger and benefit from economies of scale. A good example is Braskem’s 200,000-tonne bio polyethylene plant (equivalent to about 20% of the world’s current bioplastics production).

2.There is a concern that bioplastics based on terrestrial crops could harm food supplies; however, new innovations using food waste could be helpful in this regard and the concerns would seem to be unfounded as: ‘Perhaps 300,000 hectares are used to grow the crops which the industry processes into plastics. For comparison, this is about 0.02% of the world’s total naturally irrigated area available for cultivation. Even if half the world’s plastics were made from crops grown on food land, the industry would only require 3% of the world’s cultivated acreage.’

3.Crop-based bioplastics require fertile land, water, fertilizers, and are reliant on weather conditions. This means that the supply of raw materials for bioplastics are at risk of natural phenomena, such as drought.

Answer 2

Answer:

Three advantages of bioplastics:

1. Saving fossil fule

2. Reduction of greenhouse gas emission

3. Reclamation of by-products

Three disadvantages of bioplastics:

1. It won't biodegrade in a landfill

2. It contaminate plastic recycling streams

3. It encourage people to litter more

Explanation:

Hope it will help u


Related Questions

is when a system is in motion but is balanced because it experiences no net change.
A. Dynamic equilibrium
OB. A convection current
OC. Static equilibrium
D. Co-evolution

Answers

Answer:

dynamic equilibrium is the answer.

Dynamic - motion

Equilibrium - no net change

At the time Hutton proposed his ideas about the age of rocks, how old was Earth believed to be by most people in Scotland?

Answers

Answer:

In the late eighteenth century, when Hutton was carefully examining the rocks, it was generally believed that Earth had come into creation only around six thousand years earlier (on October 22, 4004 B.C.

James Hutton was a Scottish naturalist and geologist who discovered the age of the earth. The earth was believed to be 6000 years old by the Scottish people.

Who was James Hutton?

James Hutton is the father of modern geology and was involved in the discovery of the earth's age and the soil formation from the parent rocks. He made his contribution to discovering the age of Earth based on his observation rather than on assumptions.

Before he discovered the earth age, it was believed by the Scottish people that the planet was six thousand years old. He discovered the process of soil formation by weathering the parent and bog rocks that accumulated as sediments over years and allowed the discovery of the planet's age.

Therefore, it is believed that the earth was 6000 years old.

Learn more about James Hutton here:

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Polymers are formed via dehydration reactions by molecules. Which of the following best describes a dehydration reaction?

Assembling molecules in either carbonyl or carboxyl functional groups
Assembling molecules in either hydroxyl or carboxyl functional groups
Dissembling molecules in carboxyl functional groups
Dissembling molecules in hydroxyl functional groups

Answers

The correct answer is; "Assembling molecules in either hydroxyl or carboxyl functional groups"

Polymers are formed from monomers either by condensation or by addition of monomers.

A polymer is formed by the joining of one or more monomers. This can happen in either of the following ways;

condensationaddition

Condensation polymerization involves the loss of a small molecule. When the molecule that is lost is water, we can call it dehydration. Loss of molecules does not occur in addition polymerization.

The two monomer molecules that join to yield the polymer by dehydration must have H and OH moieties in suitable positions for dehydration to occur. A typical example is assembling molecules in either hydroxyl or carboxyl functional groups.

For more about condensation polymerization, see

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Sometimes the most practical way to do an experiment is not to perform it in an animal, but to look at cell responses in culture. Cells from mice, humans, and other mammals have been used to establish cell culture lines that have been very important for research. You are studying a novel water-soluble mouse hormone. You know cell culture can be a practical model to reveal protein function, so you apply the hormone to yeast cells, but nothing happens. What is a likely explanation for why nothing happened in your experiment

Answers

Answer:

Yeast cells likely do not have receptors that bind to this specific water-soluble mouse hormone

Explanation:

Receptors are molecules capable of binding specific signaling molecules (i.e., ligands). For example, steroid receptors can only bind to specific steroid hormones (e.g. estrogen, progesterone). Plasma membrane receptors are protein receptors that bind to water-soluble ligands. These receptors are embedded in the cell plasma membrane and usually contain several transmembrane domains. Examples of cell membrane receptors include G protein-coupled receptors (GPCRs), enzyme-linked protein receptors and ion channel receptors.

how is the cell membrane adapted to it's function

Answers

Cell membrane is made up of Lipid Bilayer which are fluid in nature , means they move continuosly , due to this fluid nature they are selectively permeable to compounds.

Which structures of this organism work together to carry out all of its life
functions?

Answers

Answer:

nucleus

Explanation:

Does anyone know the answer for the question four?

Answers

Answer:

I think it's A

Explanation:

it is because the populations of trees are decreasing as deforestation continues, so there is less resistance to greenhouse gases. please correct me if I'm wrong

what is photosynthetic pigment's​

Answers

Photosynthetic pigments are the only pigments that have the ability to absorb energy from sunlight

Answer:

A photosynthesis pigment ( accessory pigment ; chloroplast pigment ; antenna pigment ) is a pigment that is present in chloroplasts or photosynthetic bacteria and captures the light energy neccessary for photosynthesis.

Explanation:

hope it is helpful to you

MiraculousNisha

A woman took contraceptive pills to prevent pregnancy. The pill inhibits secretions of the Follicle Stimulating Hormone(FSH) from the pituitary gland. Explain the effects of taking contraceptive pills on the menstrual cycle.

I need an answer now... Pls help​

Answers

lighter bleeding, and others may skip their periods entirely. An abnormal lapse in monthly menstruation

healthline

Water pollution is an environmental factor due to rapid population growth.(True or False)?​

Answers

Answer:

False

Explanation:

Water pollution is caused by factory workers

If eukaryotes all came about due to endosymbiosis, what would result from that?

Answers

your question isnt clear. but endosymbiosis means earlier bigger prokaryotes engulfed prokaryotes that carried out aerobic respiration(later became mitochondria) and other prokaryotes that carried out photosynthesis(later became chloroplasts). these “now” mitochondria and chloroplasts “realised” that they couldnt survive without the bigger prokaryotes that engulfed them hence they remained part of the larger prokaryotes. hope that explains it.

Endosymbiosis occurs when larger prokaryotes envelop prokaryotes that perform aerobic metabolism (later known as mitochondria) and prokaryotic cells that do photosynthesis.

These "now" mitochondrion's "came to realise" that they really can not live without the bigger prokaryotes that swallowed them, and therefore they stayed with them. 

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Write the name of the forces A and B in the diagram.​​

Answers

Answer:

is that a line segment

three types of transpiration​

Answers

Answer:

1) Stomatal Transpiration

2) Lenticular Transpiration

3) Cuticular Transpiration

OAmalOHopeO

Questions for Activity 3: Making Molecular Models of Aerobic and Anaerobic Respiration

Text BoxDraw what you think the models of aerobic and anaerobic respiration would look like if you constructed them using models like in figures 3-6

Answers

kaka ddjzomssomx dmdxjsomdmsxk

Irineu vc não sabe nem eu

sksosmmsos!s s s s s. s sim cofmc. kc c. ocmc c. ximc.

heheheheheheheheheheeheheheeheh

sou toxic

toma trou xa deu mtos pontos atoa kakakakakaja

What releases oxygen into the atmosphere?
A. Iron-bearing rocks
O B. All living things
O C. Animals
th, D. Plants
S

Answers

D. plants we wouldn’t be alive without them

Certain antibacterial drugs such as trimethoprim and the sulfonamide drugs (e.g., sulfadiazine, sulfamethoxazole) selectively inhibit the synthesis and function of nucleic acids and certain essential amino acids by impairing the production of ______ in bacterial cells.

Answers

Answer:

Folic acid

Explanation:

Antibacterial drugs helps fight the bacterial infections. these drugs helps release essential amino acids by impairing the production of folic acids in bacterial cells. Bacteria infection may get severe and hazardous if they are leave untreated.

Name five types of evidence that support the theory of evolution. Write one sentence for each, explaining why it demonstrates evidence. (10 points)

Answers

The five evidences that support the theory of evolution are: Fossils, Anatomy, Embryology, Molecular Biology (or Biochemistry), and Biogeography.

Fossils show the physical change in a species over time, suggesting evidence for evolution. For an example, we can trace the origins of dolphins and whales all the way to a four-legged, dog-like hoofed mammal from about 50 mya. These mammals were fish eaters and so decided to spend a lot of time in the water. In fact, they spent so much time in the water, that in a few million years, they evolved a longer body and webbed feet. Then another few million years passed and they swapped their webbed feet for flippers and swapped their tail of a fin. Eventually, we get a fish-like mammal that once walked on land.

For anatomy, or structures, there's three types of structure comparisons: Homologous structures, Vestigial structures, and Analogous structures (or Convergent Evolution). Homologous structures show similarities between the structures between species, but serve different purposes. For an example, all mammals share common features within their arms, such as having 5 fingers. However, they serve different purposes, from whale fins for swimming, to bat wings for flying, to human hands for grabbing and for using tools.

Vestigial structures were structures that once served a purpose and have been reduced in size/power to the point where it's useless. For an example, large theropods such as the T. Rex spent so much time evolving more jaw muscles and biting power, that they sacrificed their arm muscles for such power. This explains why their arms were so short.

Another example would be ratites, flightless birds such as ostriches, emus, and cassowaries (penguins and kakapos are from a different group). They spent so much time evolving powerful legs as well as evolving in size, that there was no need to fly when they could just run with their improved legs. And also the fact that they're too heavy to even fly anyways.

Analogous structures is the similar functions of structures between species, but have separately evolved these functions. For an example, the wings from insects, birds, bats, and pterosaurs are very similar in shape and can be used to fly, but they've evolved separately. For an example, birds use feathers to fly while bats and pterosaurs use/used (pterosaurs are extinct) membrane between their bones to fly. Although they do have strikingly similar evolutionary histories, with their ancestors starting off as tree dwellers, they've evolved their flight abilities separately during different earth periods.

Embryology is evidence for evolution by using embryos from different species to suggest a common ancestor. For an example, we can prove that we're more related to whales than to fish by using embryos. The fish embryo will evolve gills while the embryos of humans and whales will not, since we do not breath by extracting oxygen from water.

Molecular biology is a more recent way of providing evidence for evolution. By taking the DNA from cells from different species, we can get an estimate of how related one species is to another. The more similar amino acid sequences are between species, the more recent their common ancestor is. For an example, by comparing amino acid sequences between humans and chimpanzees, we get an estimated amount that we once shared a common ancestor seven million years ago. Without molecular biology, we would still be digging for fossils to find that number.

Biogeography is the geographic distribution of species on earth that can be explained by evolution. For an example, we can tell that Australia separated first from Pangea rather than Asia or North America since Australia doesn't have bears while the Asia and North America do, with China having pandas and North America having brown and black bears. And also with the fact that Australia is the only continent with monotremes (egg-laying mammals like the platypus).

Similar to biogeography, there's also direct observation, which is evolution that has happened in our own eyes. An example would be the underground London mosquito. Mosquitoes usually target birds like pigeons. But after an underground tunnel was built in London, some mosquitoes managed to get inside and instead of birds, they targeted, mice, rats, and of course, humans. After only a few hundred years, a mosquito from the underground tried to mate with another mosquito from land and they could not, simply because they were different species. This shows that their new choice of feeding on mammalian blood has actually altered their DNA and created a new species, during the existence of humanity!

Each piece of DNA called a
carries
the code for
human characteristic. The whole human code
contains about
sections or

Answers

Answer:

sorry dear!! can't understand your question. Can you please rewrite this question^_^

Answer:

what is the question

Explanation:

• Categorise the materials of the following productes into 'can be recycled' and 'Cannot be recycled:

Telephone instrumentes, plastic toys Cooker handles, carry bages, ball point penos, plastic bowles plastic covering on electrical wired plastic chairs, electrical switches.

Plz give me soon answer plzzz

Answers

Answer:

Telephone instrumentes, plastic toys Cooker handles, carry bages, ball point penos, plastic bowles plastic covering on electrical wired plastic chairs, electrical switches.

Which of the following represents a tragedy of the commons?
Plastic trash in the neighborhood park
Two hospitals for the town's residents Trash pile in a person's backyard
Not enough fruit at a local market​

Answers

Tragedy is when a person feels distress due to some event or something. There can be various tragedies a person might face in his life.

In a persons life tragedy might represent an event which causes an unhappy feeling or emotional distress.

This also represent a situation which every one wants to avoid, no one welcomes a tragic event with happiness or joy.

The most annoying tragedy is a trash pile which is stinking in the backyard. A person will have to remove the pile so that the there is less pollution.

The correct answer is Trash pile in a person's backyard.

Learn more at https://brainly.com/question/24384533

Answer:

it is Plastic trash in the neighborhood park

Explanation:

tragity of the colloms means a problem in which every individual has an incentive to consume a shared resource, but at the expense of every other individual, depleting or spoiling the shared resource by their collective actions. SOO YEA SORRY ABT THAT OTHER GUY >:)

A 42 year old male decides to try to break the world record of starting the hottest grill fire in history by pumping liquid oxygen into his grill. Needless to say he now has arrived surprisingly conscious in your ER with several issues due to the ensuing explosion.

Answers

Answer:

Um well the 42 year old man should have reserched what would happen. When pumping liquid oxygen into his grill So that way he could know more of what was happening and the consequinces

Explanation:

Although your question is incomplete a more general answer is provided.  pumping of liquid oxygen into fire will lead to Vigorous burning/explosion

Liquid oxygen is oxygen compressed and stored in the form of liquid in cylinders. liquid oxygen is made available for patients with difficult in breathing and it also used for industrial process. Liquid oxygen have a boiling point that is below -238°F.  therefore

Some of the hazards associated with liquid oxygen are

when exposed to burning materials ( as seen in the grill ) it will lead to a vigorous burning in the material when in direct contact with human it can cause ; skin and eye irritationsexposure to cold temperatures    

Hence The hazard associated with liquid oxygen that led to 42 year old male been rushed to the ER is due to the Vigorous burning/explosion associated with the exposure of liquid oxygen to flame.

learn more about liquid oxygen : https://brainly.com/question/24147167

A man has three sons.

What is the chance of his next child being a son?

Answers

50%, his previous children’s gender doesn’t effect the probability of his future ones.

Substance A and substance B are mixed together. To separate the mixture, water is added, and substance A is filtered out. Then, the remaining liquid is heated to remove the water, leaving a residue of substance B. Which statement about substance A and substance B could be correct?
Substance A is rice, and substance B is sugar.
Substance A is rice, and substance B is sugar.

Substance A is sugar, and substance B is instant coffee.
Substance A is sugar, and substance B is instant coffee.

Substance A is sand, and substance B is alcohol.
Substance A is sand, and substance B is alcohol.

Substance A is alcohol, and substance B is salt.

Answers

The correct answer would be that substance A is rice, and substance B is sugar.

For substance A to be filtered out, it means that A is a water-insoluble substance and for substance B to be recoverable by evaporating off the water, it means that B is water-soluble.

Thus, A can neither be sugar nor alcohol because neither can be recovered by filtration. Also, B can neither be coffee nor alcohol because they can not be recovered as residue through evaporation of water.

Therefore, the only correct answer is that substance A is rice, and substance B is sugar because rice can be filtered out from water while the water-soluble sugar can be recovered by evaporating the water.

More about separating mixtures here: https://brainly.com/question/2827008

Answer:

substance A is rice, and substance B is sugar.

Explanation:

Which of the following statements is correct with respect to the photosynthetic pathway of grass or a cactus?

Answers

Answer:

Where are statement

Explanation:

Please tell

The vertebrate digestive system consists of a two-way tube with
A. a separate mouth and anus and accessory organs.
B. a one-way tube with a separate mouth and anus and accessory organs.
C. a two-way tube with a separate mouth and anus.
D. a tube with a single opening that serves as mouth and anus.
E. a one-way tube with a separate mouth and anus and no accessory organs.

Answers

[tex]Hello![/tex]

It's option B.

I'm sure about that.

The vertebrate digestive system consists of a two-way tube with...[tex]ANSWER:[/tex]

B. A one-way tube with a separate mouth and anus and accessory organs.

how does a classification key help identify an organism , help me please

Answers

Answer:

Classification keys are tools that provide a means to correctly identify different organisms, based on observable traits. A dichotomous key is a listing of specific characteristics, such as structure and behavior, in such a way that an organism can be identified through a process of elimination.

what is the term for female reproductive cell ?

Answers

Answer:

female reproductive call are called ova

Egg is the term for a female reproductive cell.

What is fermentation

Answers

Answer:

Fermentation is a metabolic process that produces chemical changes in organic substrates through the action of enzymes.......I am sure this is helpful for you....And have you a great future.....study well plz....first you read your book.....

What does red bone marrow make? HELP ASAP PLSSS

Answers

Answer:

it makes blood cells. :) have a nice day!

It is involved in the production of blood cells

Un tractor tira de un remolque cargado sobre un camino plano libre de fricción, con una fuerza horizontal constante de 440 N. Si la masa total del remolque y su contenido es de 275 kg, ¿Qué aceleración tiene el remolque? Formula a utilizar : Ʃ F = m . A *

Answers

Answer:

1,6 m / s ^ 2

Explanation:

De las leyes de Newton;

Fuerza = masa × aceleración

masa = 275 kg

Fuerza = 440 N

Aceleración = Fuerza / masa

Aceleración = 440N / 275Kg

Aceleración = 1,6 m / s ^ 2

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