Kinetic behavior of Candida tropicalis during xylitol production using semi-synthetic and hydrolysate based media

  title={Kinetic behavior of Candida tropicalis during xylitol production using semi-synthetic and hydrolysate based media},
  author={Ashraf F. El Baz and Yousseria M. Shetaia and R. R. Elkhouli},
  journal={African Journal of Biotechnology},
nd experiment, air flow rate 0.3 vvm) with a maximum xylitol production (36.0gm/l) after 59h as compared with that obtained in the 1 st experiment (30.99 g/L) after 66 h under relatively less oxygen limited condition (air flow rate 1.5 vvm). Increasing the initial xylose concentration from 45.5 g/L in the 2 nd experiment to 96.9 g/L in the 3 rd experiment led to a great decrease in the xylitol accumulation rate (Qp) from 0.506 to 0.134 g/L, xylitol yield coefficient (Yp/s) from 0.704 to 0.180 g… 

Figures and Tables from this paper

Bioprocess optimization of glutathione production by Saccharomyces boulardii: biochemical characterization of glutathione peroxidase

The well-known probiotic GRAS Saccharomyces boulardii (CNCM I-745) was used for the first time to produce glutathione (GSH) and the two rate-limiting genes of GSH biosynthesis “γ-glutamyl cysteine synthetase (G SH1 and GSH2)” were amplified and sequenced to validate the G SH biosynthetic potency.

Xylitol production from lignocellulosic pentosans using Kluyveromyces marxianus: kinetic modelling of yeast growth and fermentation

Kinetics of xylitol production from sugarcane bagasse hydrolysate by Kluyveromyces marxianus IIPE453t was modelled and sensitivity analysis demonstrated that xylose bioconversion linked to XRKS activity was the principal factor governing xylanol production kinetics.

Microbial xylitol production

All probable microbial xylitol production biochemical pathways encompassing diverse bioprocesses involved in uptake and conversion of xylose sugars from agricultural residues and industrial effluents are reported on.

Potential of xylose-fermented yeast isolated from sugarcane bagasse waste for xylitol production using hydrolysate as carbon source

Xylitol is a high value sugar alcohol that is used as a sweetener. In the past years, the biological process of D-xylose from lignocellulosic material into xylitol has gained increasing interest as

Semi-industrial Scale Production of a New Yeast with Probiotic Traits, Cryptococcus sp. YMHS, Isolated from the Red Sea

This is the first report of yeast with probiotic properties isolated from the Red Sea, and it has tolerance to low pH in simulated gastric juice, resistance to bile salts, hydrophobic characteristics, broad antimicrobial activity, and in vitro ability to degrade cholesterol.

Purification and Biochemical Characterization of Taxadiene Synthase from Bacillus koreensis and Stenotrophomonas maltophilia

This is the first report exploring the autonomous robust expression TDS from B. koreensis and S. maltophilia with a higher affinity to cyclize GGPP into taxadiene, which could be a novel platform for taxadienes production as intermediary metabolites of Taxol biosynthesis.

Aspergillus Niger thermostable Cytosine deaminase-dextran conjugates with enhanced structure stability, proteolytic resistance, and Antiproliferative activity

CDA-Dextran conjugates displayed a dramatic structural and thermal stability than the free enzyme, authenticating the acquired structural and catalytic stability upon dextran conjuga, as revealed from the half-life time.

Production, Bioprocessing and Anti-Proliferative Activity of Camptothecin from Penicillium chrysogenum, “An Endozoic of Marine Sponge, Cliona sp.”, as a Metabolically Stable Camptothecin Producing Isolate

This is the first report describing the feasibility of P. chrysogenum, endozoic of Cliona sp.

Biosynthesis and Anti-Mycotoxigenic Activity of Zingiber officinale Roscoe-Derived Metal Nanoparticles

Aqueous extract of Zingiber officinale Roscoe was used as reducing and capping agent for the synthesis of silver (AgNPs, copper (CuNPs), and zinc oxide (ZnONPs) nanoparticles, showing absorption peaks at λmax 416 nm, 472 nm, and 372 nm, respectively.



The influence of pH and aeration rate on the fermentation of D-xylose by Candida shehatae.

Effect of the oxygen transfer coefficient on xylitol production from sugarcane bagasse hydrolysate by continuous stirred-tank reactor fermentation

The results showed that the microbial xylitol production increased by 108% with the decrease in the oxygen volumetric transfer coefficient from 30 to 20/h.

Influence of oxygen availability on cell growth and xylitol production by Candida guilliermondii.

Evaluating the cell behavior in fermentations carried out with different dissolved oxygen concentrations makes it possible to establish complete control over this fermentative process, for both cell growth and xylitol production.

Xylitol production by Candida tropicalis under different statistically optimized growth conditions

Nutritional and environmental conditions of the xylose utilizing yeast Candida tropicalis were optimized on a shake-flask scale using a statistical factorial design to maximize the production of

Microbial production of xylitol from D-xylose using Candida tropicalis

The strain employed showed no great dependence upon temperature and achieved its best yield of xylitol from d-xylose at a pH value of 2.5, which allows non sterile cultivation, which is a major economic factor.

Xylitol production from xylose by two yeast strains: Sugar tolerance

The kinetics and enzymology ofd-xylose utilization are studied in micro-, semi-, and aerobic batch cultures during growth ofCandida guilliermondii andCandida parapsilosis in the presence of several