What is the concentration of chlorophyll B if an absorbance of 1 is measured at 431nm in a cuvette with a pathlength of 1cm. (Chlorophyll B Extinction coefficient: 57.43 mM-1 cm-1)
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- What is the concentration of chlorophyll B if an absorbance of 1 is measured at 431nm in a cuvette with a pathlength of 1cm. (Chlorophyll B Extinction coefficient: 57.43 mM-1 cm-1)
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- Calculate the reduction potential of cytochrome a3 (°' = 0.385 V) at 25.0°C when the Fe3+ form = 87.0 μM and the Fe2+ form = 25.0 μM. 0.440 V 0.353 V 0.417 V 0.387 VIn a photosynthetic investigation, a student measured the following pH of the stroma and the inner thylakoid compartments of spinach leaf cells at the conclusion of the experiment. Source of Fluid pH (mean) Standard Error of Mean (SEM) Stroma 8.2 0.75 Inner compartment of thylakoid 5.6 0.35 b. Construct an appropriately labeled graph to illustrate the sample means of the two locations to within 95% confidence (i.e. sample mean + 2 SEM).Using pearson's square, how to attain 30o Brix syrup using 50oBrix and 20o Brix syrup solutions?
- Aerobic degradation of an organic compound by mixed cultureof organism in wastewater can be represented by following reaction. C3H6O3 + a O2 + b NH3 → c C5H7NO2 + d H2o + e CO2 A. Determine a, b, c, d and e, if YX/S = 0.4 d X/g S. B. Determine the yield coefficients YX/O2 and YX/NH3. C. Determine the degree of reductions for the substrate, bacteria and RQ for the organismsYou resuspend 1 ml of of a purified chlorophyll sample in 10 ml of 80% acetone, and determine that the optical density of the solution (at 652 nm) is 0.88. What is the concentration of your original preparation?The amount of chlorophylla (M, 892) in a spinach leaf is about 20 µg/cm² of leaf. In midday sunlight, the average rate of energy reaching the leaf is 5.4 J/cm². min. Assuming an average photon energy of 270 kJ/einstein and that the leaf absorbs 50.0% of the radiation, calculate the rate of light absorption by the photons in units of einstein/cm²-min. Number rate= 1.6× 10¹4 Calculate the amount of time, in seconds, that it takes for a single chlorophyll molecule to absorb a photon. The molar mass of chlorophyll is 892 g/mol. time = Number einstein/cm². min Given that the average lifetime of an excited chlorophyll molecule in vivo is 1 ns, calculate the fraction of the chlorophyll molecules that are excited at any one time. Enter the fraction as a decimal. fraction= Number
- How many times greater is the H+ concentration in a soil with a pH of 3.0 versus a pH of 6.0?What is the ratio of H+ ions in a soil with a pH of 9.0 versus a soil with a pH of 7.0? (the ratio pH9.0/pH 4.0) Hint: pH is measured on a logarithmic scale, consider this in your calculationNicotiana tabacum cells are cultured to produce a polysaccharide gum. The reactor used is a stirred-tank reactor with an initial volume of 100 L. The maximum specific rate of growth of the culture is 0.18 d-1 and the yield coefficient of substrate in biomass is 0.5 gX/gS. The concentration of the limiting substrate in the medium is 3% (m/v). The reactor is inoculated with 1.5 g/L of cells and operated in batch until the substrate is exhausted, when the medium is fed with a constant flow rate of 8 L/d. The fed batch occurs in a quasi-steady state condition.a) Estimate the time of the batch step and the concentration of cells reached in this phase, considering exponential cell growth.b) The fed batch phase is carried out for a period of 40 days. What is the final concentration of cells in the reactor?c) The bioreactor is available for the process for 275 days a year, with an interval of 24 hours between each cultivation. What is the most advantageous operating mode for the process…Line A (entire thick black line on figure) is the absorption spectrum of the most common pigment in a newly discovered plant. What would be the predominant color of the plant ? *note the thinner blue and red lines depict other pigments, chlorophyll a and b, not being asked about in this question) 700 450 Wavelength (nm) Visible Spectrum O Yellow O White O Black O Green red Absorbance
- Calculate the amount of phycocyanin in Sample x in mg where A620=0.191 and A650=0.093, taking into account the dilution factor which is 100 and the total volume of extract which is 50 Note your answer to 2 decimal places.Quinine ( C20 H24 N2 O2) is the most important alkaloid derived from cinchona bark. It is used as an antimalarial drug. For quinine, pK, = 5.1 and pK, = 9.7 ( pKp = – log Kp). Only 1 g quinine will dissolve in 1920.0 mL of solution. Calculate the pH of a saturated aqueous solution of quinine. Consider only the reaction | Q+ H2O= QH+ + OH- described by pK, where Q = quinine. pH =A bacterial culture is grown using either octadecane (C18H38) or pentachlorophenol (C6HCl5O) as the sole source of carbon and energy. The cell yield value is determined by dry weight analysis to be 1.49 for octadecane and 0.05 for pentachlorophenol. Using either octadecane or pentachlorophenol, please describe the steps taken (and the final result) showing what percentage of the substrate carbon will be found as cell mass and as CO2? Please show all calculations.