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Sasangka Prasetyawan
Brawijaya University
Chemical Engineering, Chemistry & Bioengineering Chemistry Materials Science & Nanotechnology Medicine & Pharmacology

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Lactobacillus plantarum Fermentation Effect on Tannin Reduction, Proximate Analysis, and Protein Profiles of Ganyong (Canna edulis Kerr) Flour Azor Yulianus Tefa; Arie Srihardyastutie; Sasangka Prasetyawan
The Journal of Pure and Applied Chemistry Research Vol 8, No 1 (2019): Edition January-April 2019
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2019.008.01.437

Abstract

One of the problems in using ganyong (Canna edulis Kerr)as food is the presence of tannin, an antinutritional substance, that can reduce the nutritional quality of ganyong. The purpose of this study was aimed to analyze the effect of fermenting ganyong using Lactobacillus Plantarumbacteria on the chemical compounds and the reduction of tannin level in its flour. Theresults showed that the optimum conditions of fermenting ganyong were at pH 6, the temperature of 40 oC, and at the fermentation time of 36 hours. At the optimum conditions, Lactobacillus Plantarumwas able to decrease tannin content in ganyong from 2.53 mg/mL to 0.84 mg/mL. The reduction of tannin content is due to the activity of tannase produced by the microorganisms. Fermentation caused the enrichment protein content, from 1.87% to 2.01% and the reduction of starch, amylose, and amylopectin contents to 51%, 16.82%, and 38.08% from 60.19%, 18.27%, and 43.49% respectively. SDS-PAGE results showed that the protein profiles changed in ganyong sample after the fermentation process. Protein with a molecular weight of 72.49 kDa which showed in the non-fermented ganyong, did not appear in the fermented ganyong, and protein band intensities also showed changes.
In Vitro and In Silico Study of Immobilized Xylanase from Trichoderma viride using Bentonite Matrices Activated with HCl Nur Lailah; Sasangka Prasetyawan; Arie Srihardyastutie
The Journal of Pure and Applied Chemistry Research Vol 6, No 2 (2017): Edition of May-August 2017
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1076.579 KB) | DOI: 10.21776/ub.jpacr.2017.006.02.330

Abstract

The purpose of this study was aimed determine the optimum conditions of agitation time and concentration of immobilized xylanase by in vitro and in silico and efficient reuse of immobilized xylanase. The results of in silico test showed that xylan bounded on the residues of xylanase active site through hydrogen bonding with the amino acid glutamic 177A, glutamate 86A, tyrosine 88A, arginine 122A, and glutamine 136A, whereas bentonite and the residues of xylanase active site form hydrogen bonding with the amino acid glutamine 52, arginine 81, isoleucine 128 and glycine 130. The results of in vitro study showed that the optimum condition of xylanase immobilization was achieved at agitation time of 3 hours with the amount of xylanase adsorbed was 12.593 mg/g bentonites and activity of 50.328 units and the concentration of immobilized xylanase of 4.259 ppm and the amount of xylanase adsorbed of 16.162 mg/g bentonites and activity of 56.362 units. The immobilized xylanase can be used as many as five repetitions with the residual enzyme activity of 60%.
Effect of Topical Aplication of Gel Aloe Vera Extract on The UVB-Induced Skin Photoaging in Hairless Rats Izzatul Lailiyah; Sasangka Prasetyawan; Aulanni'am Aulanni'am
The Journal of Pure and Applied Chemistry Research Vol 6, No 2 (2017): Edition of May-August 2017
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (624.71 KB) | DOI: 10.21776/ub.jpacr.2017.006.02.321

Abstract

UVB generates the production of Reactive Oxygen Species (ROS) and decrease antioxidants enzymatic excessively. Both of these biological effects caused photo-aging. Excessive ROS production afforded overexpression of AP-1 as a major regulator of photoaging. This paper figured out the potential of Aloe vera extract as topical gel treatment on the UVB-induced skin photo-aging in twenty male wistar hairless rats (Rattus novergicus) divided into 2 groups. First group was induced by UVB and the second was induced by UVB and topical gel extract Aloe vera treatment. Each group was given treatment for 4 weeks. The expression of MDA and SOD were measured with immunohistochemistry. The result showed that the topical gel therapy decreased the MDA expression and increased SOD expression significantly (p < 0.01). The conclusion from this study was Aloe vera extract had potentially as an alternative topical treatment of photoaging.
Co-Authors Arie Srihardyastutie Aulanni'am, Aulanni'am Azor Yulianus Tefa Izzatul Lailiyah Nur Lailah