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JaniceJane
I'm a seasoned industrial engineer with a keen interest in machine learning. Here to share insights on latest industry trends.
Industry info
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Q&A
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Q
how many amino acids are in protein synthesis
JaniceJane
VirgilPetty
Release Time:
August 15, 2024, 3:15 PM
In protein synthesis, 20 different amino acids are used as the building blocks to form proteins. These amino acids are encoded by the universal genetic code and can be combined in various sequences and lengths to create a vast diversity of proteins necessary for life. Each protein’s unique sequence and composition of amino acids determine its structure and function within the body. Out of these 20 amino acids, 9 are considered essential, meaning they cannot be synthesized by the human body and must be obtained through diet. The process of protein synthesis involves two key stages: transcription, where a DNA template is used to create messenger RNA (mRNA), and translation, in which the mRNA is read by a ribosome to assemble the amino acids in the correct order.
0
Q
is silk amino acid a protein
JaniceJane
JasonKeppel
Release Time:
August 15, 2024, 7:10 AM
Yes, silk amino acids (SAAs) are a type of protein derived from the hydrolysis of silk – a natural protein fiber produced by silkworms. SAAs contain serine and aspartic acid, which are amino acids fundamental to the building and repair of muscle, skin, and hair tissues. Unlike complete proteins that contain all nine essential amino acids necessary for the dietary needs of humans, SAAs are more specialized. They are commonly used in cosmetics and personal care products for their hydrating properties and ability to enhance the elasticity of the skin, reduce fine lines, and improve hair’s silkiness and manageability.
0
Q
how are amino acids important to life
EdLincoln
JaniceJane
Release Time:
August 14, 2024, 5:42 PM
Amino acids are crucial to life as they are the building blocks of proteins, which play vital roles in almost all biological processes. Each protein within the body is made up of a unique sequence of amino acids that determines its structure and function. These functions include acting as enzymes to catalyze biochemical reactions, as structural components in tissues, in hormone production, immune responses, and nutrient transport. Amino acids can be synthesized by the body or obtained from diet. Essential amino acids, which cannot be made by the human body, must be obtained from food. Therefore, maintaining a balance of amino acids is essential for health and proper body functioning. This highlights the importance of a balanced diet and the potential need for dietary supplements in certain health conditions.
0
Q
is resin from trees
JaniceJane
RobinIII
Release Time:
August 12, 2024, 6:47 PM
Yes, resin is indeed derived from trees. It is a viscous substance produced by certain plants, especially coniferous trees, as part of their natural defense mechanisms. When these trees are wounded or under attack by pests, they release resin to seal the injury and protect themselves from further damage and infection. Resin can harden over time, forming a protective barrier. This substance has been utilized by humans in various ways for centuries, including in the production of varnishes, adhesives, and incense. Its ability to preserve substances and its natural adhesive qualities make it valuable in multiple industries, such as art, jewelry making, and in the creation of composite materials.
0
Q
how to loading amino acid in wang resin
NormanPalmer
JaniceJane
Release Time:
August 12, 2024, 8:28 AM
Loading an amino acid onto Wang resin, a solid-phase peptide synthesis (SPPS) support, involves attaching the amino acid’s carboxyl group to the resin’s hydroxymethyl linker. First, the amino acid is activated, usually by converting it to an active ester form, such as using N,N’-Dicyclohexylcarbodiimide (DCC) and N-Hydroxysuccinimide (NHS) in solution. This activation step is crucial for facilitating the nucleophilic attack by the resin’s hydroxyl group. After activation, the amino acid is mixed with the resin under suitable conditions (often dichloromethane or DMF as solvent) for the reaction to occur, generally at room temperature. The efficiency of this step can be enhanced by using dimethylaminopyridine (DMAP) as a catalyst. Post-reaction, the resin is washed with an appropriate solvent to remove any unreacted amino acid and activation reagents. The degree of loading can be determined by quantitative methods like Fmoc quantification. This step is crucial in peptide synt...
0
Q
what will glue polypropylene
JustinDorothea
JaniceJane
Release Time:
August 11, 2024, 12:03 PM
Polypropylene is notoriously difficult to glue due to its chemically resistant and nonporous nature, which makes it resistant to most adhesives. However, certain types of glues are designed to work with polypropylene and similar plastics. Cyanoacrylate adhesives, often known as “super glues,” can bond polypropylene, but their effectiveness is limited and usually not suitable for high-strength applications. A better option is a two-part epoxy designed specifically for plastics, which can create a strong bond if the surface is properly prepared. Surface preparation often involves cleaning with isopropyl alcohol and abrading the surface to increase adhesion. There are also specialty adhesives called “polyolefin adhesives” specifically formulated for polypropylene and polyethylene. For industrial applications, techniques like plastic welding or using a polypropylene-compatible adhesive with a primer might be preferred. Always follow the manufacturer’s recommen...
0
Q
are crystal resin bad to wear
BernardSurrey
JaniceJane
Release Time:
August 11, 2024, 10:59 AM
The safety of wearing crystal resin jewelry depends largely on the type of resin used and individual sensitivity. Crystal resin, often used in creating unique and vibrant jewelry pieces, can be made from different materials, primarily epoxy or polyester resins. Epoxy resin is generally considered safer because it has a lower likelihood of causing skin irritation. However, some people may still experience allergic reactions due to prolonged contact with the skin. Polyester resin, while more affordable, tends to emit fumes that can irritate the skin and eyes during curing; once fully cured, though, these risks diminish. If you’re sensitive to certain materials, it’s advisable to test a small area of skin before wearing resin jewelry extensively. Opting for high-quality, reputable brands that use hypoallergenic materials can also minimize potential adverse effects.
0
Q
how hard is epoxy resin after curing
BowenMarner
JaniceJane
Release Time:
August 7, 2024, 3:12 AM
Epoxy resin, widely used in various applications due to its excellent properties, typically cures into a very hard and durable material. The hardness of cured epoxy resin is often measured using the Shore D scale or the Rockwell hardness scale, with typical values ranging from 70 to 90 Shore D, which is comparable to the hardness of some metals and harder than many plastics. Factors influencing the final hardness include the specific type of resin and hardener used, the mixing ratio, and the curing conditions such as temperature and time. Generally, higher temperatures and longer curing times result in harder resins. However, excessive heat can lead to brittleness. It’s also important to note that while epoxy resin is hard, it remains somewhat flexible, allowing it to resist cracking under stress. For applications requiring extra hardness, such as flooring or countertops, special hardeners or additives may be used. Overall, epoxy resin provides an ideal balance of hardness and du...
0
Q
how to measure epoxy by weight
JaniceJane
TomLongfellow
Release Time:
August 5, 2024, 9:23 AM
Measuring epoxy resin by weight is an accurate method that ensures the proper ratio of resin to hardener, critical for optimal curing and final properties. To do this, you’ll need a digital scale that can measure in grams or ounces with precision. Start by consulting the manufacturer’s instructions for the specific weight ratio required for your resin and hardener. Place an empty mixing cup on the scale and tare it to zero. Pour the resin into the cup until you reach the desired weight. Next, calculate the weight of the hardener needed based on the recommended ratio. For instance, if the ratio is 2:1 resin to hardener and you have 100 grams of resin, you’ll need 50 grams of hardener. Pour the hardener into the cup with the resin until the scale shows the total weight reaches that required for both components combined. Mix thoroughly according to the manufacturer’s instructions. Using weight instead of volume is more reliable due to the varying densities of resin...
0
Q
what glue can be used on polypropylene
JaniceJane
HeloiseMatilda
Release Time:
August 5, 2024, 6:28 AM
Polypropylene (PP) is a thermoplastic polymer that is known for its excellent resistance to chemicals, heat, and electricity. These properties make PP a popular material for a wide range of applications, from packaging to automotive components. However, bonding polypropylene can be challenging due to its non-polar nature, which means it does not readily adhere to most adhesives. To successfully bond polypropylene, specific types of glue must be used. One of the most effective types of glue for bonding polypropylene is a solvent-based adhesive. Solvent cements, such as those containing dichloroethane, can dissolve the surface of the polypropylene, allowing for a strong bond when the surfaces are brought together. It’s important to note that solvent cements require proper ventilation during application due to their volatile nature. Another option is using a two-part epoxy specifically formulated for use with plastics like polypropylene. These epoxies often contain a primer that hel...
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