scholarly journals Characterization of Chitosan Extracted from Fish Scales of the Colombian Endemic Species Prochilodus magdalenae as a Novel Source for Antibacterial Starch-Based Films

Polymers ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 2079
Author(s):  
Carlos Molina-Ramírez ◽  
Paulina Mazo ◽  
Robin Zuluaga ◽  
Piedad Gañán ◽  
Juan Álvarez-Caballero
Keyword(s):  
Molecular Weight ◽  
Antibacterial Activity ◽  
Room Temperature ◽  
Low Molecular Weight ◽  
Fish Scales ◽  
Molecular Weight Characteristic ◽  
Mild Conditions ◽  
And Staphylococcus Aureus ◽  
Positive Results

Scales of Prochilodus magdalenae, a Colombian endemic fish species, were used to obtain chitosan for application as an antibacterial agent integrated into starch-based films. Analysis of its composition during the demineralization and deproteinization process indicated that minerals and protein were both removed successfully. At this point, mild conditions for the deacetylation process were employed, namely, 2, 4, and 6 wt.% NaOH at room temperature for 16 h. Chitosan processed under 2 wt.% NaOH had low molecular weight, with the lowest value of 107.18 ± 24.99 kDa, which was closely related to its antibacterial activity. Finally, this chitosan was integrated into a banana starch-based film, and its antibacterial activity was assayed in Escherichia coli and Staphylococcus aureus cultures, with positive results in the former culture, especially due to the low-molecular-weight characteristic of chitosan.

scholarly journals Preparation and Characterization of the Low Molecular Weight Human Plasma 3S γ1-Globulins

1965 ◽  
Vol 240 (7) ◽  
pp. 2868-2876 ◽  
Author(s):  
T. Ikenaka ◽  
D. Gitlin ◽  
K. Schmid
Keyword(s):  
Molecular Weight ◽  
Human Plasma ◽  
Low Molecular Weight

scholarly journals Characterization of Trypsin Inhibitor in Florunner Peanut Seeds (Arachis hypogaea L.)1

1988 ◽  
Vol 15 (2) ◽  
pp. 81-84 ◽  
Author(s):  
E. M. Ahmed ◽  
J. A. Applewhite
Keyword(s):  
Molecular Weight ◽  
Amino Acid ◽  
Aspartic Acid ◽  
Arachis Hypogaea ◽  
Trypsin Inhibitor ◽  
Low Molecular Weight ◽  
Arachis Hypogaea L ◽  
Amino Acid Profiles ◽  
Low Levels

Abstract Florunner peanut seeds contained five trypsin isoinhibitors. Amino acid profiles of the trypsin inhibitors fraction showed high levels of aspartic acid, half-cystine and serine and low levels of histidine and tyrosine. The molecular weight of the inhibitor was 8.3 KDa. The presence of multiforms of this inhibitor, its low molecular weight and the high amount of half-cystine indicate that peanut trypsin inhibitor is of the Bowman-Birk type.

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