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Provide a brief definition and a description of the significance of the following terms in NMR spectroscopy
(1) CW-NMR spectroscopy (2) the nuclear Overhauser effect
(3) the free induction decay
(4) a 90o pulse
(5) J coupling
(6) distance geometry
(7) intermediate exchange
(8) SAR by NMR
(9) the Larmour frequency
(10) residual dipolar couplings
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- Provide a brief definition and a description of the significance of the following terms in NMR spectroscopy (7) intermediate exchange(8) SAR by NMR(9) the Larmour frequencyJustify and explain following statements. (a) Paper chromatography is a type of partition chromatography. (b) The R f value is 1. (c) Chromatography is only a qualtitative technique. (d) The adsorbent should be insoluble in the solvent. (e) Chromatography is used to separate only color compounds.(I) Why the physicochemical changes in liquid water caused by radiation is the key to understanding the biological effects of radiation? Please give a short, one-sentence explanation. (II) Name the three key stages of the physicochemical changes produced in liquid water due to radiation. (III) Briefly describe the three key stages. A one- or two-sentence explanation for each of the three key stages would be sufficient.
- Paper electrophoresis of Asn, Ala, Asp, Lys and Ser mixtures at pH = 7 shows the fastest movement towards the anode The fully saponified 10g oil sample consumed 1.87g KOH, and the iodine value of the oil was 28.3. So how many unsaturated double bonds are there in each oil molecule on average? (lodine is known to have an atomic weight of 127) Given that 100g cellulose sample is completely hydrolyzed to obtain 78g glucose, then the percentage of cellulose in the sample is _% Given that the Km of catalase is 20mmol/L and the substrate concentration is 80mmol/L, then the percentage of catalase bound to the substrate is %Explain why it has been very difficult to obtain an X-ray crystal structure for the complete nuclear pore complex. Explain in terms of its size, number of proteins as well as its molecular properties (e.g. charge)Which nuclear isotope used in protein NMR spectroscopy is the most sensitive to detect? Briefly explain why.
- Calculate the average dipole–induced-dipole interaction energy, in joules per mole (J mol−1), between a water molecule and a benzene molecule separated by 1.0 nm.Young's double slit experiment is one of the quintessential experiments in physics. The availability of low cost lasers in recent years allows us to perform the double slit experiment rather easily in class. Your professor shines a green laser (570 nm) on a double slit with a separation of 0.113 mm. The diffraction pattern shines on the classroom wall 4.0 m away. Calculate the fringe separation between the second order and central fringe. m Additional MaterialsWhat are the three bodies that Scheper-Hughes and Lock propose in the article? Why are they good/useful to think with? Article link below https://moodle.swarthmore.edu/pluginfile.php/83002/mod_resource/content/0/Scheper-Hughes,%20Lock-%20Mindful%20Body.pdf
- How do you draw the resolution to the double Holliday junction? Each step explained in detail.Would you expect a change in column temperature to have an effect on a reversed-phase chromatographic separation of a steroid mixture? Explain the reason for your answer in (1) aboveAssume that you list the following types of electromagnetic radiation in order of increasing wavelength: () the gamma rays produced by a radioactive nuclide used in medical imaging: (ii) radiation from an FM radio station at 93.1 MHz on the dial; (iii) a radio signal from an AM radio station at 680 kHz on the dial; (iv) the yellow light from sodium vapor streetlights; (v) the red light of a light-emitting diode. Which one would be the second? Lütfen birini seçin: O a 680 kHz AM radio waves O b. the red light O c the yellow light O d. 93.1 MHz FM radio waves O e the gamma rays