Concept explainers
To explain: How chitin can be chemically modified.
Concept introduction:
Chitin is a structural polysaccharide and it is made up of glucose units. A natural biopolymer that is derived from chitin is known as chitosan. They are extracted from the shells of crabs, lobster and shrimp. The chitosan can block the absorption of cholesterol and dietary fat. It is also used for medicine.
To explain: The reason how the chitin modification treatment affects its physical and chemical properties.
Concept introduction:
Chitin is a structural polysaccharide and it is made up of glucose units. A natural biopolymer that is derived from chitin is known as chitosan. They are extracted from the shells of crabs, lobster and shrimp. The chitosan can block the absorption of cholesterol and dietary fat. It is also used for medicine.
To provide: Some examples of industrial and medical uses for chitosan.
Concept introduction:
Chitin is a structural polysaccharide and it is made up of glucose units. A natural biopolymer that is derived from chitin is known as chitosan. They are extracted from the shells of crabs, lobster and shrimp. The chitosan can block the absorption of cholesterol and dietary fat. It is also used for medicine.
To determine: Whether all the advertised uses for chitosan are supported by scientific data or not.
Concept introduction:
Chitin is a structural polysaccharide and it is made up of glucose units. A natural biopolymer that is derived from chitin is known as chitosan. They are extracted from the shells of crabs, lobster and shrimp. The chitosan can block the absorption of cholesterol and dietary fat. It is also used for medicine.
Want to see the full answer?
Check out a sample textbook solutionChapter 8 Solutions
FUNDAMENTALS OF BIOCHEMISTRY-ACCESS
- Draw the predominant form of glutamic acid at pH = 8.4. The pKa of the side chain is 4.1. Include proper stereochemistry. HO H2N OH pH = 8.4arrow_forwardHow would I draw this?arrow_forwardCalculate the standard change in Gibbs free energy, AGrxn, for the given reaction at 25.0 °C. Consult the table of thermodynamic properties for standard Gibbs free energy of formation values. NH,Cl(s) →NH; (aq) + C1 (aq) AGrxn -7.67 Correct Answer Determine the concentration of NH+ (aq) if the change in Gibbs free energy, AGrxn, for the reaction is -9.27 kJ/mol. 6.49 [NH+] Incorrect Answer kJ/mol Marrow_forward
- What are some topics of interest that neurotoxicologists study? For example, toxin-induced seizures, brain death, and such along those lines?arrow_forwardCould you help me with the explanation of the answer to exercise 15, chapter 1 of Lehinger Question Nombramiento de estereoisómeros con dos carbonos quirales utilizando el sistema RS(R,R)El isómero del metilfenidato (Ritalin) se utiliza para tratar el trastorno por déficit de atención con hiperactividad (TDAH).(S,S)El isómero es un antidepresivo. Identifique los dos carbonos quirales en la siguiente estructura. ¿Es este el(R,R)o el(S,S)¿isómero? Dibuja el otro isómero. Nombramiento de estereoisómeros con dos carbonos quirales utilizando el sistema RS(R,R)El isómero del metilfenidato (Ritalin) se utiliza para tratar el trastorno por déficit de atención con hiperactividad (TDAH).(S,S)El isómero es un antidepresivo.arrow_forwardThe reaction A+B → C + D AG°' = -7.3 kcal/mol can be coupled with which of the following unfavorable reactions to drive it forward? A. EFG+HAG° = 5.6 kcal/mol. B. J+KZ+A AG° = 2.3 kcal/mol. C. P+RY+DAG° = 8.2 kcal/mol. D. C + T → V + W AG°' = -5.9 kcal/mol. E. AN→ Q+KAG°' = 4.3 kcal/mol.arrow_forward
- What would be the toxicological endpoints for neurotoxicity?arrow_forwardWhat are "endpoints" in toxicology exactly? Please give an intuitive easy explanationarrow_forwardFura-2 Fluorescence (Arbitrary Unit) 4500 4000 3500 3000 2500 2000 1500 1000 500 [Ca2+]=2970nM, 25°C [Ca2+] 2970nM, 4°C [Ca2+]=0.9nM, 25°C [Ca2+] = 0.9nM, 4°C 0 260 280 300 340 360 380 400 420 440 Wavelength (nm) ← < The figure on the LHS shows the excitation spectra of Fura-2 (Em = 510 nm) in 2 solutions with two different Ca2+ ion concentration as indicated. Except for temperature, the setting for excitation & signal acquisition was identical.< ப a) The unit in Y-axis is arbitrary (unspecified). Why? < < b) Compare & contrast the excitation wavelength of the Isosbestic Point of Fura-2 at 25 °C & 4 °C. Give a possible reason for the discrepancy. < c) The fluorescence intensity at 25 °C & 4 °C are different. Explain why with the concept of electronic configuration. <arrow_forward
- BiochemistryBiochemistryISBN:9781319114671Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.Publisher:W. H. FreemanLehninger Principles of BiochemistryBiochemistryISBN:9781464126116Author:David L. Nelson, Michael M. CoxPublisher:W. H. FreemanFundamentals of Biochemistry: Life at the Molecul...BiochemistryISBN:9781118918401Author:Donald Voet, Judith G. Voet, Charlotte W. PrattPublisher:WILEY
- BiochemistryBiochemistryISBN:9781305961135Author:Mary K. Campbell, Shawn O. Farrell, Owen M. McDougalPublisher:Cengage LearningBiochemistryBiochemistryISBN:9781305577206Author:Reginald H. Garrett, Charles M. GrishamPublisher:Cengage LearningFundamentals of General, Organic, and Biological ...BiochemistryISBN:9780134015187Author:John E. McMurry, David S. Ballantine, Carl A. Hoeger, Virginia E. PetersonPublisher:PEARSON