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How do the properties of ceramics change at high temperatures, and what makes them suitable for use in high-temperature applications such as gas turbine engines and furnace linings?

asked Jan 31 in Materials Chemistry by ColumbusRebe (830 points)

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What is the specific concentration of the pesticide residue chlorpyrifos in a particular brand of apples and how does it compare to the Maximum Residue Limit (MRL) established by the regulatory authority? Additionally, what is the potential human health impact of consuming the apples with the measured pesticide residue concentration?

asked Jan 31 in Environmental Chemistry by DallasMerrim (530 points)

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How do carbohydrate-protein interactions affect the recognition and binding between enzymes and their substrates?

asked Jan 31 in BioChemistry by Elton8187317 (190 points)

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What is the molecular structure and geometry of carbon dioxide according to quantum mechanics principles?

asked Jan 31 in Physical Chemistry by LPFVirgie959 (590 points)

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How do bioluminescent organisms utilize photochemistry to produce light? What are the specific photochemical properties of the luciferase enzyme responsible for bioluminescence and how does it interact with its substrate? Are there any potential applications of the photochemical properties of bioluminescence in fields such as medicine or biotechnology?

asked Jan 31 in PhotoChemistry by SilkeCormier (310 points)

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What is the impact of carbon dioxide on global warming and how does it contribute as a greenhouse gas?

asked Jan 31 in Environmental Chemistry by EmmaMsq72893 (550 points)

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What is the chemical structure of an unknown organic compound that has been analyzed using magnetic resonance spectroscopy, and what functional groups are present in the compound?

asked Jan 31 in Physical Chemistry by EthelSchenk9 (370 points)

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How do changes in the electronic structure of reactants affect the rate and mechanism of electron transfer processes during redox reactions?

asked Jan 31 in Quantum Chemistry by DemetriaP87 (660 points)

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What are the specific photochemical properties responsible for the bioluminescence exhibited by organisms such as fireflies, jellyfish, and bacteria, and how can this knowledge be applied in the synthesis of new luminescent molecules for various applications?

asked Jan 31 in PhotoChemistry by ByronHedges2 (290 points)

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How do changes in the electronic and magnetic properties of molecular magnets affect their stability and potential for use in magnetic data storage applications?

asked Jan 31 in Quantum Chemistry by StephanyHors (510 points)

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What is the mechanism for the catalytic activity of carbonic anhydrase, a metalloenzyme that catalyzes the conversion of carbon dioxide to bicarbonate? Describe the coordination chemistry of the metal ion in the active site of carbonic anhydrase and how it facilitates the reaction.

asked Jan 31 in Coordination Chemistry by Bernard99695 (550 points)

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What is the electronic structure and composition of the first excited state of the ethylene molecule (C2H4) using time-dependent density functional theory?

asked Jan 31 in Computational Chemistry by Steve6884784 (630 points)

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What are the mechanisms of bioaccumulation and biomagnification of persistent organic pollutants (POPs) in the aquatic food chain and how do these processes lead to environmental contamination and potential health risks for humans who consume contaminated seafood?

asked Jan 31 in Environmental Chemistry by Shawna348041 (310 points)

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How does the process of beta-oxidation regulate the concentration of free fatty acids in the blood during periods of high fat intake?

asked Jan 31 in BioChemistry by AlberthaLong (430 points)

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What is the difference between benzene and toluene in terms of aromaticity and reactivity with electrophiles?

asked Jan 31 in Organic Chemistry by Erik71620607 (510 points)

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What is the molecular geometry and polarity of the carbon tetrafluoride (CF4) molecule?

asked Jan 31 in Inorganic Chemistry by RoccoPreece (370 points)

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What is the isomeric relationship between butane and 2-methylpropane? Draw the structures for each of the isomers and explain the difference in their physical properties.

asked Jan 31 in Organic Chemistry by CyrusG329117 (730 points)

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How do changes in surface properties of food contact materials, such as metals or polymers, affect the adhesion and removal of microorganisms during food and beverage processing?

asked Jan 31 in Surface Chemistry by Daniella42I3 (370 points)

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How effective are the current environmental regulations in protecting aquatic life from chemical pollutants in bodies of water?

asked Jan 31 in Environmental Chemistry by UlrichN79563 (330 points)

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What is the structure of compound X, based on its nuclear magnetic resonance spectroscopy spectrum, which displays a singlet at 3.8 ppm and a quartet at 1.2 ppm?

asked Jan 31 in Analytical Chemistry by CarrieBlackm (430 points)

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