what is the disadvantage to smaller particle size of the stationary phase?
Answers
Answer:The disadvantage of a smaller particle size of the stationary phase is that it leads to a higher pressure drop across the column.
Explanation:
The stationary phase is the part of a chromatography column that does not move. It is usually a solid or a liquid coated onto a solid support. The smaller the particle size of the stationary phase, the greater the surface area of the particles, which allows for more efficient separation of the components in the mixture. However, smaller particles also lead to a higher pressure drop across the column, which can limit the flow rate of the mobile phase and increase the time required for the separation. This can be a disadvantage because it can reduce the throughput of the system and limit the amount of sample that can be processed in a given amount of time.
The primary disadvantage to smaller particle size of the stationary phase is on separation efficiency.
Because the smaller particles have a lower interstitial capacity, they reduce sample dilution in column chromatography, which has a major impact on separation efficiency.
In column chromatography, a mixture of molecules is divided into a mobile phase and a stationary phase depending on their differences in partitioning.
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Related Questions
1.
How many different kinds of coin were available in old Italy?
Answers
Around 90 different coin kinds were in use in Italy in 1859, creating a financial mess that was only resolved after the country was united. Consequently, establishing a currency union for the emerging business region was of utmost importance.
Italy's previous currency was the lira.The florin served as the benchmark for coinage throughout Europe and evolved into the preferred trade coin that was more valuable than silver. By introducing their own currencies, many European countries started to adopt the florin as their model. The Italian lira replaced the florin as the country's currency in the sixteenth century.
What currency do you believe to be the oldest?Stator of Lydia The World's Oldest Coin. Various academics contend that the Lydian stater is regarded as the oldest coin remaining in existence. These ancient coins, known as electrum, were produced in the country of Lydia, in what is now modern day Turkey, circa 600 BCE.
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Which of these igneous rocks cooled so quickly that crystals
did not form, creating a natural glassy look?
Answers
Erwin Chargaff's research determined the percentage of the nitrogen bases within a strand of DNA. His work determined thatthe concentration of adenine is twice the concentration of thymine and the concentration of cytosine is twice the concentration of guanine.the percent of adenine is equal to the percent of guanine and the percent of cytosine is equal to the percent of thymine.the percent of adenine is equal to the percent of thymine and the percent of cytosine is equal to the percent of guanine.the concentrations of adenine, thymine, guanine, and cytosine are all equal.
Answers
Erwin Chargaff's research determined the composition of the nitrogen bases within a strand of DNA. His work determined that DNA composition varies, but the amount of adenine is always the same as thymine and the amount of cytosine is always the same as guanine. Chargaff also found that the composition of DNA varied from one species to another.
We can conclude that the correct answer is:
Answer:the percent of adenine is equal to the percent of thymine and the percent of cytosine is equal to the percent of guanine.How would you describe dominant in a different way then this? In a easy way?
Refers to a trait that appears more frequently than another trait, resulting from interactions between gene alleles.
Answers
Answer:
A dominant allele is a variation of a gene that will produce a certain phenotype, even in the presence of other alleles. A dominant allele typically encodes for a functioning protein. The allele is dominant because one copy of the allele produces enough enzyme to supply a cell with plenty of a given product.
Please Hurry WILL GIVE BRAINLIST
An example of sunlight passing through clouds during sunset, results in what is often called the cloud's silver lining. Pastel shades of blue, pink, purple, and green can be observed at times of cloud cover. What is the cause of these patterns in the sky?
Responses
Water in the atmosphere and within the clouds themselves cause light waves to refract and reflect, creating an assortment of colors.
Water in the atmosphere and within the clouds themselves cause light waves to refract and reflect, creating an assortment of colors., EndFragment,
The patterns occur when light is diffracted from water droplets within the clouds. The amount of diffraction that occurs depends on the wavelength of the light, and shorter wavelengths are diffracted at a greater angle than longer ones.
The patterns occur when light is diffracted from water droplets within the clouds. The amount of diffraction that occurs depends on the wavelength of the light, and shorter wavelengths are diffracted at a greater angle than longer ones.
StartFragment, The patterns occur when light is diffracted from water droplets within the clouds. The amount of diffraction that occurs depends on the wavelength of the light, and shorter wavelengths are diffracted at a greater angle than longer ones., The patterns occur when light is diffracted from water droplets within the clouds. The amount of diffraction that occurs depends on the wavelength of the light, and shorter wavelengths are diffracted at a greater angle than longer ones., EndFragment, ,
The patterns occur when light is absorbed by water droplets within the clouds. The amount of absorption that occurs depends on the temperature of the air.
The patterns occur when light is absorbed by water droplets within the clouds. The amount of absorption that occurs depends on the temperature of the air., EndFragment,
The patterns occur when light is reflected from water droplets within the clouds. The amount of reflection that occurs depends on the wavelength of the light, and shorter wavelengths are reflected at a greater angle than longer ones.
Answers
The cause of the color patterns in the sky is when light is diffracted from water droplets within the clouds, the amount of diffraction that occurs depends on the wavelength of the light, and shorter wavelengths are diffracted at a greater angle than longer ones which is therefore denoted as option D.
What is Diffraction?This is a term which is described as the process of light bending around an obstacle or spreading out after it moves through a small or tiny space.
We should also be aware that it is dependent on the wavelength of the light such that those with a shorter wavelengths are usually diffracted at a greater angle than longer ones which is therefore the reason why the color pattern is observed in the sky and is therefore the reason why it was chosen as the correct answer.
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Figure 2 shows some structures involved in the coordination of a reflex action.
Describe how the structures shown in Figure 2 help to coordinate a reflex action.
Answers
Answer:
You got this!
Determine which equation is false, based on the solution set S:{4}.
3t = 12
3m + 7 = 14
4(4c + 1) = 68
9 = 5p − 11
Explanation:
How will building a road through the rainforest affect the plants and animals
Answers
Answer:
it will kill paints remove animal homes take more area that was for animals so they will fight over territory even more
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colorblindness is an x-linked recessive genetic trait. the frequency of the mutant colorblind allele is 1/50. what is the probability that k will be colorblind if he is male? it is not known if anyone in the family is colorblind
Answers
The probability of K being colorblind if he is male is equal to the probability of the mother carrying the mutant colorblind allele, which is 1/50.
Colorblindness is an X-linked recessive genetic trait, meaning it is associated with genes located on the X chromosome. In males, who have one X chromosome, the presence of the colorblind allele on that chromosome determines whether they will be colorblind or not.
The given information states that the frequency of the mutant colorblind allele in the population is 1/50, which means that in a random individual, there is a 1/50 chance of having the colorblind allele.
Since it is not known if anyone in K's family is colorblind, we assume that the mother's allele frequency is the same as the general population. Therefore, the probability of the mother carrying the mutant colorblind allele is also 1/50.
As K is male, he inherits his X chromosome from his mother. If his mother carries the mutant colorblind allele and passes it on to him, he will be colorblind. Thus, the probability of K being colorblind if he is male is equal to the probability of the mother carrying the mutant colorblind allele, which is 1/50.
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A student conducted an experiment to test the strength differences between an orb spider's web and a black widow spider's web. The student calculated the strength of the wob by using the number of seconds each web held a 4 gram weight What type of results did the student calculate in this experiment?
A) Qualitative results
B) Problem-solving results
C) Hypothetical results
D)Quantitative results
Answers
Answer: D
Explanation:
Quantitative type of result the student calculate in this experiment.
What is Quantitative type of results?Quantitative research is based on the collection and interpretation of numeric data. It focuses on measuring (using inferential statistics) and generalizing results.
The student have no hypothetical formula to calculate the actual strength of the web of both spider, so he always use to get quantitative type of result in his results.Hence option D is correct.
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ASSIGNMENT 2.1.2. Give the numbers and names of the places (regions) where Chlorophyll-containing cells occur. 2.1.3. In which of the places in question 2.1.2 does most photosynthesis occur? 2.1.4. How is the part named in question 2.1.3. structurally adapted for process of photosynthesis? 2.1.5. Give the number and name of the tissue that transports the prod of photosynthesis to the rest of the plant. E.1.6. Name the components of tissue in question 2.1.5.
Answers
2.1.2. The numbers and names of the places (regions) where Chlorophyll-containing cells occur are:
1. Epidermis2. Mesophyll3. PhloemWhat is the parts for photosynthesis?2.1.3. The mesophyll is the primary site of photosynthesis in plants. The mesophyll is a layer of cells that lies between the epidermis and the phloem. The mesophyll cells contain chlorophyll, which is the green pigment that captures sunlight and uses it to convert carbon dioxide and water into oxygen and glucose.
2.1.4. The mesophyll cells are structurally adapted for photosynthesis in several ways. First, the mesophyll cells are packed with chloroplasts, which contain chlorophyll. Second, the mesophyll cells have a large surface area, which allows them to absorb more sunlight. Third, the mesophyll cells have a thin layer of cytoplasm, which allows for the rapid diffusion of gases and nutrients.
2.1.5. Phloem
The phloem is a vascular tissue that transports food and nutrients throughout the plant. The phloem is made up of two types of cells: sieve tubes and companion cells. Sieve tubes are long, thin cells that are connected by small pores. Companion cells are smaller cells that are attached to sieve tubes. Companion cells help to provide energy and support for sieve tubes.
2.1.6. The components of the phloem tissue are:
Sieve tubesCompanion cellsPhloem parenchymaPhloem fibersFind out more on photosynthesis here: https://brainly.com/question/19160081
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Damaged tissues are normally repaired through replacement of damaged or dead cells through a process called fibrosis. True or false?.
Answers
Damaged tissues are normally repaired through replacement of damaged or dead cells through a process called regeneration, hence, it is false.
Damage to tissues can occur internally or externally. When this occurs, a series of events called tissue repair are set in motion to contain the damage and initiate the healing process. One of these processes is called regeneration.
When the body replaces damaged or dead cells using cells of the same type, it is called regeneration. This occurs in most skin injuries like cuts, minor burns or scrapes and often doesn't leave any major scar. The internal organ that regenerates outstandingly well is the liver. Since the same type of cells are used during regeneration, the normal function of the organ is restored after regeneration.
Fibrosis occurs only when the damage done to the organ or tissue is excessive. Scar tissue called fibroblasts are deposited forming scar tissue to hold the organ or tissue together.
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Unicellular organisms are made up of only one cell that carries out all of the functions needed by the organism, while multicellular organisms use many different cells to function.
Unicellular organisms include bacteria, protists, and yeast.
a. Why do you think unicellular organisms perform asexual reproduction? (give two reasons)
b. What type of asexual reproduction do bacteria most commonly use?
Answers
Answer:
A)
1: The offspring of the cell will contain the exact genes of the parent by reproducing asexually
2: They can reproduce rapidly by reproducing asexually.
B) Binary fission. One cell simply splits into two identical cells.
Explanation:
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Two fruit flies that are heterozygous for body color and eye color are crossed. Brown body color is dominant to black body color. Red eye color is dominant to brown eye color. Use the Punnett square to determine the ratio of offspring with: Brown body and red eyes Brown body and brown eyes : Black body and red eyes : Black body and brown eye.
Answers
The ratio of offspring that possess the following phenotype is as follows:
Brown body and red eyes: 9Brown body and brown eyes: 3Black body and red eyes : 3Black body and brown eye: 1This question involves two genes coding for body color and eye color in fruit flies respectively. The brown body color allele (B) is dominant over the black body color allele (b) in the first gene while the red eye color allele (R) is dominant over the brown eye color allele (r) in the second gene. In a dihybrid cross between two fruit flies that are heterozygous for both genes i.e. BbRr × BbRr, the allelic combinations of gametes produced by each parent fruit fly will be:BbRr- BR, Br, bR and brUsing these gametes to complete a punnet square (see attached image), 16 possible offsprings will be produced in a ratio 9:3:3:1 where;Brown body and red eyes (B_R_) : 9Brown body and brown eyes (B_rr) : 3 Black body and red eyes (bbR_) : 3Black body and brown eye (BbRr) : 1Hence, the ratio of the offsprings will be 9:3:3:1Learn more about punnet square at: https://brainly.com/question/14504341?referrer=searchResults
Answer:
9, 16, 3, 16, 3, 16, 1, 16
Explanation:
Brown body and red eyes ⇒ 9 ⇒ 16
Brown body and brown eyes ⇒ 3 ⇒ 16
Black body and red eyes ⇒ 3 ⇒ 16
Black body and brown eyes ⇒ 1 ⇒ 16
What system sends signals through the whole body?
Answers
Ghcyjfkcgbrhjh
Answer:
Nervous System
Explanation:
The nervous system works to send signals throughout the body. The Nervous System: Doctors estimate that every person has about 100 billion neurons in their brain, which are responsible for sending and receiving messages.
What is the name of the selective agent present in mitis-salivarius agar?
a. tellurite
b. phenol red
c. neutral red
d. eosin
Answers
a. Tellurite, is a selective agent which is present in mitis-salivarius agar.
Mitis Salivarius Agar with Tellurite (MSAT) is a type of an enriched selective medium which has application in the isolation of Streptococcus salivarius, Streptococcus mitis and the other oral Enterococci and Streptococci which are found in different clinical specimens.
Peptones are a source of nitrogen, carbon, vitamins etc. and are added to the MSAT. Potassium tellurite and crystal violet are selective agents and can inhibit the growth of most gram negative bacilli and also the most gram positive bacteria excluding Streptococci.
Hence, option a. is the correct option.
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How does water scarcity affect species in the saltwater biome?
please dude I need help
Answers
the echocardiogram demonstrates akinesis of the LV apex. which coronary artery is most likely affected by coronary artery disease?
Answers
The left anterior descending artery is most likely affected by coronary artery disease.
Coronary artery sickness is due to plaque buildup inside the wall of the arteries that deliver blood to the heart (referred to as coronary arteries). Plaque is made up of cholesterol deposits.
Coronary heart ailment cannot be cured however treatment can assist manipulate the signs and decrease the possibilities of troubles including heart attacks. remedy can encompass: way of life changes, which includes everyday workout and preventing smoking.
A very blocked coronary artery will cause a coronary heart attack. The classic symptoms and signs of a coronary heart assault encompass crushing chest pain or strain, shoulder or arm ache, shortness of breath, and sweating.
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a basin-like formation defined by high points and divides that descends into lower elevation is a/an
A. Aquifer
B. Permeable rock layer
C. Watershed
Answers
Explanation:
watershed Is a basin like landform
In a group of jaguars, some individuals have a black coat and others have a spotted coat. In this group, the gene for the coat pattern trait has two alleles. The allele A is for a black coat, and the allele a is for a spotted coat.
Oracle, a jaguar from this group, has a black coat. Oracle has one allele for a black coat and one allele for a spotted coat.
Answers
Answer:
mark me brilliant
Explanation:
If Oracle has one allele for a black coat and one allele for a spotted coat, then the genotype of Oracle would be heterozygous. This can be represented as Aa, where A represents the allele for a black coat and a represents the allele for a spotted coat. Because the allele for a black coat is dominant over the allele for a spotted coat, the phenotype of Oracle would be black.
Some cells send signals to themselves by secreting molecules that bind to receptors in their own plasma membranes. what is this known as?
Answers
Some cells send signals to themselves by secreting molecules that bind to receptors in their own plasma membranes known as Autocrine signaling.
Cell signals emitted by a cell can attach to the same cell, or "self," in a process known as autocrine signaling. Autocrine agents or autocrine signals are the chemicals that the cells produce as signals.
The hormones or chemical signals known as autocrine agents work as ligands and attach to receptors found on the cells that produce them. Autocrine receptors are the name given to such receptors. Upon their binding to the receptors (autocrine stimulation), these autocrine substances start the essential chemical reaction inside the cell. This is often noticed during the first phases of development, when organ creation takes place and pain and inflammation are regulated.
Virus-infected cells are also a result of autocrine signalling. In order to maintain cellular homeostasis, autocrine signalling is also essential. Progesterone, for instance, has been demonstrated to function as an autocrine signal in breast cancer.
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What have scientist learned from the human genome project
Answers
Answer:The HGP found that, in fact, humans have only about 20,000-25,000 genes (current estimates peg this to the lower end of that range). This number was quite a surprise to many scientists – many other organisms, such as rice and water fleas, actually have many more genes than we do!
Explanation:
Why are plants and animals called multicellular organisms?
Answers
Answer:
Plants and animals are called multicellular organisms because they are made up of more than one cell. Unlike unicellular organisms such as bacteria and protozoa, which consist of a single cell, plants and animals have specialized cells that are organized into tissues, organs, and organ systems. These cells work together to perform specific functions, such as obtaining nutrients, exchanging gases, and responding to the environment.
Multicellularity allows plants and animals to achieve a higher level of complexity and specialization than unicellular organisms, which can only perform limited functions. It also allows for greater efficiency in tasks such as movement, growth, and reproduction. The specialization of cells and tissues in multicellular organisms is one of the key features that distinguishes them from unicellular organisms, and it is essential for the proper functioning of these organisms as a whole.
I NEED HELP WITH THESE QUESTIONS PLEASE
1. Explain how the use of Chief to produce offspring had both advantages and disadvantages
2. Explain how genetic engineering or CRISPR could be used to improve the chance that more of Chief’s offspring would survive.
3. State one reason why modifying tomatoes to have proteins that are poisonous to insects could be seen as negative.
4. State one method that can be used to produce many identical tomato plants of this special GMO type without having to repeat the steps of genetic modification every time you want a new tomato plant.
Answers
In agriculture and the food sector, genetic technology has both advantages and problems. While it can help produce more food and enhance agricultural and animal quality and efficiency, it can also have detrimental implications on the environment and human health.
As a result, it's critical to carefully consider the dangers and advantages of every genetic alteration or engineering effort and to make sure it's done responsibly and sustainably.
Scientists must collaborate with farmers, policymakers, and consumers to set rules and standards that balance the potential benefits of genetic technology with the hazards associated with it, and to guarantee that it is used in a way that benefits everyone involved.
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insulin is a hormone secreted by the islets of langerhans and is essential for the metabolism of carbohydrates, fats, and protein. the nurse understands the physiologic importance of gluconeogenesis, which refers to the:
Answers
The nurse understands the physiologic importance of gluconeogenesis, glucose synthesis from non-carbohydrate sources. This mostly happens in the liver.
Creating glucose from sources other than carbs is known as glucoseneogenesis. To suit the needs of the body, it aims to keep the blood's level of glucose stable. During the recovery period following prolonged muscular effort, the liver's mechanism of producing blood glucose from lactate is highly active. Non-carbohydrate substrates (such lactate, amino acids, and glycerol) are converted into glucose by a process known as "gluconeogenesis". Both lactate and alanine are first transformed into pyruvate, which is subsequently taken up by pyruvate carboxylase and carboxylated to oxaloacetate (OAA) in the mitochondrion (PC).
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Read through the following scenario and answer the questions that follow. \begin{tabular}{|l|} \hline Scenario A \\ Tshepiso has accepted a new job as a medical sales representative at PharmCo Inc. Sh
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Tshepiso has accepted a new job as a medical sales representative at PharmCo, Inc. She is excited to start working for the company. Tshepiso has a background in sales and marketing, and she is looking forward to using her skills in her new role. However, Tshepiso knows that she will need to learn a lot about the pharmaceutical industry to be successful in her new role. She plans to work hard and learn as much as she can so that she can excel in her new position.
1. What is Tshepiso's new job title?
Tshepiso's new job title is medical sales representative.
2. What skills does Tshepiso have that will be useful in her new role?
Tshepiso has a background in sales and marketing, and she is looking forward to using her skills in her new role.
3. What does Tshepiso plan to do to be successful in her new role?
Tshepiso plans to work hard and learn as much as she can so that she can excel in her new position.
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Two haploid daughter cells are produced during what phase
Answers
Answer:
The phase in which two haploid daughter cells are produced is telophase.
Explanation:
a cell whose haploid number is 12 will have how many chromosomes present at prometaphase of mitosis?
Answers
At prometaphase of mitosis, a cell whose haploid number is 12 will have 12 chromosomes. This is because the haploid number is the total number of chromosomes present in a gamete (sex cell). At the beginning of mitosis, the number of chromosomes is equal to the haploid number, so a cell with a haploid number of 12 will have 12 chromosomes at prometaphase.
In mitosis, two sets of replicated chromosomes (i.e. two copies of each chromosome) are present. Thus, at prometaphase, there will be a total of 24 chromosomes in the cell - 12 replicated chromosomes, each containing the same genetic information.
This number of chromosomes can be further divided into two sets of homologous pairs, each containing one set of replicated chromosomes.
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3. After watching the video "Changes in Global CO2", what patterns do you recognize from the data gathered since 1958? What changes to global CO2 have been noticed?
Answers
Since 1958, the global CO₂ levels have been steadily increasing. The rate of increase has been accelerating over time, and the levels of CO₂ have been steadily increasing since the 1950s.
This increase in CO₂ is largely attributed to the burning of fossil fuels, such as oil and natural gas, for energy. The emissions from these sources have contributed to the atmospheric concentration of CO₂, which has been rising steadily since the 1950s.
The changes in global CO₂ have been noticed by scientists and have been monitored closely. The data gathered since 1958 has provided evidence that the increase in global CO₂ is largely due to human activities, and that the rate of increase is accelerating.
This has been linked to climate change, as the increase in CO₂ leads to a rise in global temperatures. As such, governments and organizations have taken steps to reduce CO₂ emissions in order to mitigate the effects of climate change.
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Which of the following is an appropriate hypothesis to answer the question, why are leaves green?
A: To study the coloring of leaves, scientists grew 250 maple trees within a greenhouse over the course of six months and analyzed the structure of over 1,000 leaves.
B: Leaves are green due to the presence of chlorophyll, a pigmented compound found within the leaves.
C: Based upon the given data, which spans 25 years of research, scientists determined that leaves are green due to the presence of chlorophyll, a pigmented compound found within leaves.
D: Using the work of previous scientists and adding new data to their information, scientists have found that leaves are green due to the presence of chlorophyll, a pigmented compound found within leaves.
PLEASE HELP FAST !!!!!!!!!!!!!!!!!
Answers
Answer:D
Explanation:
Answer:
D. Using the work of previous scientists and adding new data to their information, scientists have found that leaves are green due to the presence of chlorophyll, a pigmented compound found within leaves.
Explanation:
13. What are the two parts of a scientific name? *
Answers
Answer:
1. genus
2. species ............