Recent activity by TimNakamura

1 answer 8 views

How does the size and shape of nanoparticles affect their photochemical properties? Provide experimental evidence to support your answer.

answered 21 hours ago in PhotoChemistry

1 answer 24 views

How does the intensity of light affect the rate of reaction between potassium permanganate and oxalic acid in acidic medium?

asked 3 days ago in Chemical kinetics

1 answer 16 views

What is the quantum yield of a photochemical reaction in which 50% of the absorbed photons lead to the formation of the product? How does it differ from the quantum efficiency of the reaction and how can it be experimentally determined?

asked 3 days ago in Physical Chemistry

1 answer 27 views

How does the presence of cholesterol in a lipid bilayer affect the fluidity and permeability of the membrane?

answered 3 days ago in BioChemistry

1 answer 27 views

What is the step-by-step procedure for the preparation of 4-bromoacetanilide from acetanilide and bromine and how can the purity of the final product be determined using techniques like melting point determination and TLC analysis?

asked 3 days ago in Chemical synthesis

1 answer 29 views

How do the photochemical properties of photochromic materials change with exposure to different wavelengths of light?

answered 3 days ago in PhotoChemistry

1 answer 23 views

What is the effect of ligand modification on the photochemical properties of lanthanide complexes? How does the presence of heavy atoms in the ligand affect the absorption and emission spectra of these complexes?

answered 3 days ago in PhotoChemistry

1 answer 32 views

What is the net yield of ATP molecules produced by one turn of the citric acid cycle, and how do the electron transport chain and oxidative phosphorylation contribute to the overall production of ATP in cellular respiration?

asked 3 days ago in BioChemistry

1 answer 32 views

How does the molecular structure of a polymer-based membrane affect its performance in removing specific contaminants from water during the process of water treatment?

asked 4 days ago in Polymer Chemistry

1 answer 5 views

How does the metabolism of lipids affect cell signalling pathways in the body? Provide an in-depth explanation of the biochemical processes involved and any relevant examples.

answered 4 days ago in BioChemistry

1 answer 20 views

What is the mechanism responsible for the phosphorescent properties of materials and how can this property be optimized for use in practical applications such as organic light-emitting diodes (OLEDs)?

asked 4 days ago in PhotoChemistry

1 answer 21 views

How does the length of a conjugated polymer chain affect its electronic and optical properties, as calculated through quantum chemistry methods?

answered 4 days ago in Quantum Chemistry

1 answer 26 views

How does the coordination environment around the metal ion in a metalloenzyme affect its catalytic activity towards a specific substrate? Provide a detailed analysis of the coordination chemistry of at least one metalloenzyme and its role in catalysis.

answered 6 days ago in Coordination Chemistry

1 answer 26 views

How does the concentration of greenhouse gases, specifically carbon dioxide, affect the Earth's temperature and what chemical processes are involved in trapping heat in the atmosphere?

answered 6 days ago in Environmental Chemistry

1 answer 5 views

How does the concentration and type of pesticide residue found in commonly consumed fruits and vegetables vary across different regions of the world, and how does this impact human health in those areas?

answered 6 days ago in Environmental Chemistry

1 answer 23 views

What is the bond enthalpy of the chlorine molecule (Cl2) in kilojoules per mole? Use the given bond enthalpies in kJ/mol: Cl-Cl bond = 242 kJ/mol. Show your calculations and explain the process of determining the bond enthalpy of a molecule.

answered Feb 18 in Chemical bonding

1 answer 36 views

How does the activity of lipoprotein lipase (LPL) vary in different tissues and how does it affect lipid metabolism and transport in the body?

asked Feb 13 in BioChemistry

1 answer 37 views

What is the net ATP gained through one round of glycolysis?

asked Feb 13 in BioChemistry

1 answer 27 views

What is the net number of ATP molecules produced during glycolysis and gluconeogenesis? Provide a detailed explanation of the metabolic pathways involved in these processes that result in ATP production.

asked Feb 13 in BioChemistry

1 answer 44 views

How can the synthesis and characterization of new materials be optimized for use in gas sensors to detect volatile organic compounds (VOCs) in industrial and household environments?

asked Feb 11 in Materials Chemistry

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