What effect does sodium benzoate appear to have on the fermentation rate of yeasts? Research teams investigating methods of improving the fermentation rate of yeasts have set uptwo fermentation chambers, complete with yeasts and a glucose solution. One chamber alsoreceived a solution of sodium benzoate, a food preservative. Sodium benzoate has been shown tolower the pH of the cytoplasm of yeast cells. The chambers were checked after 15 minutes ofactivity, and they are shown in the diagram here (the chamber with sodium benzoate is the one onthe left):47tty

Fermentation is a metabolic process that produces chemical changes in organic substrates through the…

Answered: What effect does sodium benzoate appear…

Science

Biochemistry

What effect does sodium benzoate appear to have on the fermentation rate of yeasts?

Aquaculture Science

3rd Edition

ISBN:9781133558347

Author:Parker

Publisher:Parker

Chapter2: Aquatic Plants And Animals

Section: Chapter Questions

Problem 2KA

See similar textbooks

Similar questions

For the production of a secondary metabolic by Streptomyces coelicolor, a fed batch was performed. At the end of the single batch phase, the following conditions were reached in the reactor: V=10000L, cell concentration X=10g/L and product concentration P=0.1g/L. The feeding was then started with constant flow F= 200L/h, for 100h. Knowing that the substrate concentration in the feeding medium was SF= 80g/L and in the fermentation medium it was practically null, calculate: a) The final concentration of cells and productb) If the reactor were fed with a constant dilution rate (D), what should be the value of D used to reach the same cell concentration obtained in the situation with constant flow?μp= 0.01 g of product/ (g of cells.h)Y x/s = 0.15g cells/g of substrate
Yeast cells are added to a 3.0 L batch bioreactor so that the initial cell concentration is [X]. = 1.3 g cells / L. The growth mediğim in the reactor, which is well-mixed so the cells have access to all nutrients, contains 150 g CELL DATA ribose (C5H10O5, MW 150), 75 g ammonia (NH3, MW 17), and 85 g oxygen (O2, MW 32). A-10. Determine the maximum concentration of cells, [X], that will form in the bioreactor when the limiting nutrient is consumed. Search Yx/ribose YX/02 YX/NH3 Specific growth rate on limiting nutrient, u Lag phase duration Deceleration phase duration 0.48 g/g 0.87 g/g 0.23 g/g 0.51 h 30 minutes Negligible
The production of a product P from a particular gram-negative bacteria follows the Monod growth law max Cs Co Ks + C, rg = with max (a) The reaction is to be carried out in a batch reactor with the initial cell concentration of Cco = 0.1 g/dm³ and substrate concentration of Cso = 20 g/dm³. = 1 h-¹, Ks = 0.25 g/dm³, and Y₁ = 0.5 g/g. c/s = p/c Cc Cco + Yc/s(Cs0 - Cs) = Plot rg, -rs-re, Cs, and Co as a function of time. The reaction is now to be car (b) dilution rate at which wash-out out in a CSTR with Cso = 20 g/dm³ and Cco = 0. What is the occurs? (c) For the conditions in part (b), what is the dilution rate that will give the maximum product rate 0.15 g/g? What are the concentrations Cc, C₁, Cp, and ―r, at this value of D? (g/h) if Y
Show the calculations required to make up 250mlof a stock solution of this chemical that will then be at the working concentration when 1 volume of this solution is added to 10 volumes of cell culture medium.
Yeast cells has been cultured on glucose (Table 1). The growth data follows the Monod Equation Table 1: Growth data for yeast cells Glucose concentration (mg/L) 7 10 15 40 200 1000 Specific growth rate (h*¹) 0.066 0.088 0.12 0.294 0.330 0.364 0.419 0.451 0.2 0.304 0.340 0.458 Observed yield, Y'x/s (g/g) a) Calculate the maximum specific growth rate (max) and the substrate constant (Ks) b) Estimate the true yield Y'x/s and the maintainance coefficient ms c) Calculate the doubling time at a concentration of 15 mg/L glucose d) Calculate the substrate consumption rate (rs) assuming a substrate concentration of 40 mg/L and a biomass concentration of 100 mg/L
Two flasks of E. coli are grown in batch culture in the same medium (2% glucose and amino acids; no nitrate) and at the same temperature (378C). Culture #1 is well aerated. Culture #2 is anoxic. After 16 hours the following observations are made: ■ Culture #1 has a high cell density; the cells appear to be in stationary phase, and the glucose level in the medium is reduced to 1.2%. ■ Culture #2 has a low cell density; the cells appear to be in logarithmic phase, although their doubling time is prolonged (over 1 hour). The glucose level is reduced to 0.2%. Why does culture #2 have so little glucose remaining relative to culture #1, even though culture #2 displayed slower growth and has less biomass?
continuous disc stack centrifuge is operated at 5000 rpm for separation of tukers' yeast. At a feed rate of 60 min21, thirty of the cells are recovered. For operation at constant centrifuge speed, solids recovery is inversely proportional to the flow rate. (a) What flow rate is required to achieve 90% cell recovery if the centrifuge speed is maintained at 5000rpm thi What operating speed is required to achieve 90% recovery at a feed rate of 60 min211).
A certain medium has the following composition:Glucose 15 gYeast extract 5 gPeptone 5 gKH2PO4 2 gDistilled water 1,000 mla. Tell what chemical category this medium belongs to, and explainwhy this is true.b. How could you convert Staphylococcus medium intoa nonsynthetic medium?
What are the two appropriate control groups if flask 2: ‘Yeast + Glucose + Water’ is your experimental group and what is each missing that flask 2 contains?
Explain the results observed with the boiled piece of potato. The word limit 150 wds although good answers may be considerably shorter!
(a) Cell culture system can be maintained in several fermentation devices. Based on Figure Q2.1: (Sistem kultur sel boleh dikekalkan di dalam beberapa peranti penapaian. Berdasarkan Rajah Q2.1:1 OUTLET FOR SPENT MEDIUM LIGHT SOURCE RESERVOIR OF STERILE MEDIUM VALUE CONTROLLING FLOW OF MEDIUM PHOTO CELL Figure Q2.1: Laboratory setup for a cell culture system (Ali et al., 2018, Eur. J. Pharm. Med. Res.) [Rajah Q2.1: Penyusunan makmal untuk sistem kultur sel (Ali et al., 2018, Eur. J. Pharm. Med. Res.)]
Sydney Brenner isolated Salmonella typhimurium mutants that were implicated in the biosynthesis of tryptophan and would not grow on minimal medium. When these bacterial mutants were tested on minimal medium to which one of four compounds (indole glycerol phosphate, indole, anthranilic acid, and tryptophan) had been added, the growth responses shown in the following table were obtained. Mutant Minimal medium Anthranilic Indole glycerol acid Indole Tryptoph phosphate trp-1 trp-2 trp-3 trp-4 trp-6 trp-7 trp-8 trp-9 trp-10 trp-11 - Give the order of indole glycerol phosphate, indole, anthranilic acid, and tryptophan in a biochemical pathway leading to the synthesis of tryptophan. Indicate which step in the pathway is affected by each of the mutations. + 1 + 1 II