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3 years ago

What effect does the size of an amino acid on the retention factor?

2 answers:

6 0

According to proteomic data analysis, the N-terminus residues highly influence the retention of amino acids due to their role in ion-pairing. Every amino acid has a retention coefficient factor depending on the N-terminus residues it contains. Therefore, the longer the amino acid the higher the likelihood of it having high N-terminus residues and consequent high retention co-efficient.

Flura [38]3 years ago

6 0

The retention factor is a value used by chemists performing thin-layer chromatography which indicates the distance a particular compound traveled across a stationary phase in contrast to the solvent. While the size of an amino acid is not the only factor involved, generally, the larger the amino acid, the slower it will travel, ultimately leading to a smaller retention factor.

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60 PT!! PLZ HELP ;(

CaHeK987 [17]

1. 3.5

2. Polar covalent

3. Polar covalent

4. Polar covalent

5. The bonds in a CCl4 molecule are polar, but CCl4 itself is a nonpolar covalent.

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3 0

3 years ago

Which of the following is NOT a natural resource?

Marizza181 [45]

Answer:

fire is your answer i hope this helps

4 0

2 years ago

Read 2 more answers

What bone fragments were used to convict luetgert?

expeople1 [14]

Adolph Louis Luetgert, born on December 27, 1845, was originally named Adolph Ludwig Lütgert. He was born in a town called Gütersloh, located in the province of Westphalia, which is now a part of Germany.[4]

His parents, Christian Heinrich Lütgert and Margreta Sophia Severin, had sixteen children; twelve other sons and two daughters. Adolph was the forth born in the family, and he also had a twin named Heinrich Friedrich "Fritz" Luetgert, who died before Adolph around 1894 or 1895. While Adolph was growing up, his father dealt with animal hides and tallow wool as well a dabbling into real estate.

Adolph's schooling lasted from about the age of seven until the age of fourteen and after those seven years of schooling, Adolph became an apprentice for Ferdinand Knabel who taught him about the tanning business. During the time of the apprenticeship, Adolph continued to live in Westphalia however as an apprentice he lived with his boss instead of his family. After working for Knabel for two and a half years, Luetgert began to travel around Germany, working wherever he could. At the age of nineteen, Luetgert traveled to London, England where he stayed for about six months but left because he was unable to find a job other than scrubbing restaurant floors.[5]

Life in America[edit]

Adolph Luetgert came to New York in around 1865 or 1866 when he was about twenty years old. Like many others, he had heard that thousands of his countrymen were going to America with very little money. With about thirty dollars to his name, Luetgert boarded a ship bound for the United States.

Luetgert arrived in New York and after a short time there he went to Quincy, Illinois to meet up with some friends of his brother who were living there. He stayed in Quincy for about four months before moving to Chicago in search of a job at a tannery. He found a job at Union Hide and Leather Company. He did not have a steady job or constant pay at the tannery, so he began to also take on random jobs such as moving houses. From 1867 to 1868, Luetgert got a job at another tannery called Engle, Crossley & Co. He then worked at another tannery called Craig, Clark & Company, but later returned to work at the Engle Brother's Tannery until 1872.

Luetgert then started his own business with the four thousand dollars he had saved. Initially, he went into the liquor business before starting his sausage company in 1879.

He married his first wife, Caroline Roepke, sometime between 1870 and 1872. She died on November 17, 1877. He married his second wife Louise Bicknese, two months after Caroline's death, on January 18, 1878. Luetgert had six children—two with Caroline and four with Louise. Only three of his children survived past the age of 2.[5]

Murder and police investigation[edit]

8 0

3 years ago

Describe the function of a vesicle

Sedbober [7]

Vacuoles are vesicles that contain mostly water and are found in plant cells. They transport water in and out of the cell. ... Transport vesicles work primarily with the endoplasmic reticulum and the Golgi apparatus. They transport molecules such as proteins and fats in between these two organelles.

7 0

3 years ago

Can i have some help with this

Paraphin [41]

Answers

Hi,are the answers and explanations;

A flower is responsible for facilitating pollination in a plant.It contains petals that attract insects for pollination.In has the male and female producing gametes for plants thus in facilitating the transfer of pollen grains from anthers to the stigma for pollination to occur
The pistil and stamen location are position in a manner that pollen grains can be transferred from the anthers to the stigma with help of agents of pollination such as wind and animal.
Flowers have nectar which is used by bees and other small flying insects in making of honey.The insects enter into the flower when attracted by bright petals. .Both organisms here benefit mutually thus it is called mutualism
Flowers have bright colors and contain strong odor to attract insects who are agents of pollination.Insects are attracted to visit a flower in search of nectar if the color of the petals are bright and have a good scent.Dull colored petals attract less or no insect thus face difficulty in pollination process because insects as agents of pollination will not facilitate the process in dull colored petals.
The ovary becomes the fruit while the ovules become the seeds.In a flower, the ovary that houses the ovules will develop into the fruit of the plant.In the ovary, there are ovules which will develop into seeds of the fruit for the plant.
Pollen grains acts as the male sex cells in the flower that are transferred to the stigma to meet the female sex cells.The pollen grains are produced by the anthers and could be deposited on the female sex cells by agents of pollination such as wind, insects or animals.
Fertilization takes place in the ovary of the female flower. The pollen grains from the anthers are transferred to the stigma of the female parts by agents of pollination such as insects.At the stigma tip, a pollen tube develops and grows down. The male sex cells then travel down the style into the ovary where fertilization takes place.
Fruits carry the seeds of a flowering plant.A fruit is a fleshy r dry tissue that surround the seeds of a flowering plant and could be edible.Fruits harden to make seed access difficult thus protecting the seeds.Fruits facilitate dispersion process when transferred from place to place by water or animals.
Male part of a plant flower is called stamen.The stamen is made up of the anthers and filament of the flower.The stamen is responsible for the production of male sex cells.The filament holds the anthers into position to facilitate pollination where as the anthers contains the pollen grains which are the male sex cells.
The Pistil is the female part of the plant flower.It is composed of the stigma, style, ovary and ovules.The stigma is a landing stage for the pollen grains from the anthers.The style holds the stigma into position to receive the male gametes.The ovary carry the seeds/ ovules and develops into the fruit of the plant.The ovules develop into the seeds of the plant.
A flower pollinated by insects will have more pollen grains.The insects rubs its body as it sucks nectar in the flower carrying most of the pollen grains on its body.When on the stigma, the pollen are deposited there in sure amounts.However, in wind pollination, most grains are dispersed by wind without reaching the stigma.
It is better for a plant flower to have another flower pollen grains fertize it. This is cross pollination and it comes with advantages such as development of a new breed of plants, it facilitates development of high resistant plants and can results to plants that have favorable and improved traits as compared to original species.
Carbon-dioxide gas enters the leaf through the stomata where as water vapor leaves the leaf. Stomata are tiny pores that allow for gases exchange in the leaf.
Stomata are important to plants because they facilitate the exchange of gases in the leaf.The plant takes in carbon-dioxide through the leaf and release oxygen to the atmosphere.In addition, stomata aid in transpiration process, where plant loose excess water in their tissues to the environment.
Most plants have their stomata opened during the day than at night to facilitate intake of carbondioxide which is essential for the process of photosynthesis.During the day, sunlight is present thus with enough carbondioxide intake , plants a can make enough sugars for use.
The stomata can be closed during the day in cases where the temperatures are too high causing excessive loss of water from the plant through the leaves. Such a situation could result to plant wilting thus the plant mechanism could close the stomata to maintain the stored water and avoid wilting.
Meristematic cells trigger the growth of new cells in the young seedlings at the tip of roots and shoots and forming buds.These group of cells have the ability of division and re-division.

7 0

3 years ago