Thermodynamic characterization of Aspergillus flavus KP998209 xylanase, Production optimization with statistical optimization

2021 ◽  
Vol 0 (0) ◽  
pp. 0-0
Author(s):  
Amal Hashem ◽  
Nermeen Elzairy ◽  
Faten Ahmed ◽  
Abdelgawad Hashem ◽  
Mohamed Abdel–Naby
2020 ◽  
Vol 42 ◽  
pp. e9
Author(s):  
Bruno Las-Casas Chaves ◽  
Ana Paula Martinazzo ◽  
Brisabella Coca ◽  
Adriane Nunes De Souza ◽  
Carlos Eduardo Teodoro

This paper reports the process of production optimization and partial characterization of xylanase from a newly isolated Bacillus amyloliquefacies VR002, isolated from local soil. The microorganism exhibited maximum xylanase production when 1.0% (v/v) of inoculum size was added to culture medium with initial pH 6, 1.0% (w/v) birchwood xylan, at 35 °C after 48h of incubation. Xylanase production in different carbon sources apart from birchwood xylan and xylose did not show high production levels. Optimum pH for xylanase activity was 6.0. The enzyme was alkali-stable and retained 100% of residual activity over the pH range from 6.0 to 10.0 for 24 h at 25°C. Optimum temperature for enzyme activity was 55°C. Xylanase was 100% stable at 4°C and 25°C even after 24h of incubation, a desirable characteristic for enzyme storage. Moreover, best crude extract volume and time reaction were found to be 10 µL and 5 min, respectively. After optimization of production and activity parameters, an increase of nearly 60-fold in xylanase activity (44.12 ± 4.36 U/mL) was achieved. Characteristics of B. amyloliquefaciens VR002 xylanase are particularly desirable for biotechnological applications


Author(s):  
Beatrix Huber ◽  
Klaus W. Richter ◽  
Hans Flandorfer ◽  
Adolf Mikula ◽  
Herbert Ipser

2020 ◽  
Vol 65 (5) ◽  
pp. 747-751
Author(s):  
S. V. Sysoev ◽  
T. M. Kuzin ◽  
L. N. Zelenina ◽  
K. V. Zherikova ◽  
N. V. Gelfond

2005 ◽  
Vol 14 (9) ◽  
pp. 2387-2404 ◽  
Author(s):  
María C. Lidón-Moya ◽  
Francisco N. Barrera ◽  
Marta Bueno ◽  
Raúl Pérez-Jiménez ◽  
Javier Sancho ◽  
...  

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Olalekan A. Balogun-Agbaje ◽  
Olubusola A. Odeniyi ◽  
Michael A. Odeniyi

Abstract Background Poly-γ-glutamic acid (γ-PGA) is a biopolymer of microbial origin, consisting of repeating units of l-glutamic acid and/or D-glutamic acid. The biopolymer has found use in the fields of agriculture, food, wastewater, and medicine, owing to its non-toxic, biodegradable, and biocompatible properties. Due to its biodegradability, γ-PGA is being tipped to dislodge synthetic plastics in drug delivery application. High cost of production, relative to plastics, is however a clog in the wheel of achieving this. Main body of abstract This review looked at the production, nanoparticles fabrication, and drug delivery application of γ-PGA. γ-PGA production optimization by modifying the fermentation medium to tailor towards the production of desirable polymer at reduced cost and techniques for the formulation of γ-PGA nanoparticle as well as its characterization were discussed. This review also evaluated the application of γ-PGA and its nanoparticles in the delivery of drugs to action site. Characterization of γ-PGA and its nanoparticles is a crucial step towards determining the applicability of the biopolymer. γ-PGA has been used in the delivery of active agents to action sites. Conclusion This review highlights some of the efforts that have been made in the appraisal of γ-PGA and its nanoparticles for drug delivery. γ-PGA is a candidate for future extensive use in drug delivery.


2009 ◽  
Vol 89 (3-4) ◽  
pp. 257-267 ◽  
Author(s):  
Latha-Selvi Canabady-Rochelle ◽  
Christian Sanchez ◽  
Michel Mellema ◽  
Sylvie Banon

1973 ◽  
Vol 5 (6) ◽  
pp. 873-890 ◽  
Author(s):  
R.J. Ackermann ◽  
Alexander T. Chang

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