scholarly journals Pengaruh Variasi Konsentrasi NaOH Terhadap Nilai Derajat Deasetilasi Kitosan dari Limbah Cangkang Kerang Hijau (Perna viridis L)

KOVALEN ◽  
2020 ◽  
Vol 6 (3) ◽  
pp. 171-176
Author(s):  
Winda Trisna Wulandari ◽  
Nurzaman ◽  
Anindita Tri Kusuma Pratita ◽  
Keni Idacahyati
Keyword(s):  
Optimum Condition ◽  
Perna Viridis ◽  
Optimum Conditions ◽  
Degree Of Deacetylation ◽  
Deacetylation Degree ◽  
Shell Waste ◽  
Chitosan Deacetylation ◽  
Conch Shell

Chitin which is the result of processing from green conch shell waste can be transformed into chitosan through a deacetylation process using variations in the concentration of NaOH. This study aims to determine the optimum conditions of variations in base concentration to the value of the degree of deacetylation of chitosan. The types of bases used are NaOH with the concentration variations of 50%, 55%, and 60%. Chitosan obtained was calculated the yield and characterized using FTIR. The results showed the optimum condition of the value of chitosan deacetylation degree was achieved by using 60% NaOH which produced the highest deacetylation degree value of 76.5%. Keywords: Green mussels shell, chitin, chitosan, deacetylation

scholarly journals Optimization of Degree of Deacetylation of Chitosan Snail Shells (Pilla ampulaceae)

2019 ◽  
Vol 31 (9) ◽  
pp. 2083-2086
Author(s):  
Nurhaeni ◽  
Ahmad Ridhay ◽  
A.H. Laenggeng
Keyword(s):  
Optimum Condition ◽  
Optimum Conditions ◽  
Degree Of Deacetylation ◽  
Deacetylation Degree ◽  
Hard Shell ◽  
Temperature Time

Snails fields (Pilla ampulaceae) have a hard shell and are known to be one of the sources of biomaterial called chitin. Chitosan is a natural biopolymer that can be obtained from chitin deacetylation. The objective of this study was to obtain the optimum conditions of chitin deacetylation in highest degree deacetylation of chitosan. This study used random complete method that contains various of NaOH concentration (30, 40, 50, 60 and 70 %), temperature of deacetylation (60, 90, 120, 150 and 180 °C), time of deacetylation (1, 2, 3, 4 and 5 h) and ratio between NaOH and chitin (1:4, 1:6, 1:8, 1:10 and 1:12 b/v) with three repetitions. The deacetylation degrees of chitosan were determined by FTIR. The results show the optimum condition of deacetylation degrees of NaOH concentration, temperature, time and ratio of NaOH and chitin are 60 %, 150 °C, 4 h and 1:10, respectively. This produces the highest deacetylation degree of chitosan rate of 83.23 %.

scholarly journals Synthesis and antibacterial activity of chitosan membrane from shrimp shell waste

2021 ◽  
Vol 926 (1) ◽  
pp. 012016
Author(s):  
H Aldila ◽  
M K Swandi ◽  
D Y Dalimunthe
Keyword(s):  
Antibacterial Activity ◽  
Test Results ◽  
Simple Method ◽  
Chitosan Membrane ◽  
Deacetylation Degree ◽  
Shrimp Shell ◽  
Shell Waste ◽  
Shrimp Shell Waste ◽  
The Fourier Transform ◽  
Chitosan Deacetylation

Abstract Synthesis and antibacterial activity of chitosan membrane was investigated. Chitosan membrane have been successfully by simple method from chitosan extracted from shrimp shell waste. Extraction of chitosan was carried out in four steps: demineralization, deproteinization, decolorization and deacetylation of chitin. The effect of deacetylation temperature on deacetylation process was studied. The results shown that the increase of deacetylation temperature from 30°C to 90°C causes the increase of chitosan deacetylation degree (DD). The increase of deacetylation temperature cause the increment of OH- attack to the amino group thus realizing the effective deacetylation of chitin. The highest chitosan DD was up to 77.99% is achieved under the deacetylation temperature from 90°C and the occurrence of deacetylation structurally demonstrated by the Fourier transform infrared (FTIR) and the XRD characterization. The antimicrobial test results used S. epidermidis and P. acne of chitosan membrane at various deacetylation temperature conditions indicated that no bacterial activity for all variants.

Swelling and Crosslinked Formaldehyde Chitosan as Adsorbent for Metal Ion Cu (II)

2017 ◽  
Vol 890 ◽  
pp. 171-175
Author(s):  
Budi Hastuti ◽  
Yulia Santrinitas
Keyword(s):  
Optimum Condition ◽  
Adsorption Capacity ◽  
Metal Ion ◽  
Optimum Conditions ◽  
Degree Of Deacetylation ◽  
Modified Chitosan

Research about comparison of chitosan modified by swelling and formaldehyde crosslinked in adsorption of metal ion Cu (II) on variation of pH solution and concentration of chitosan has been done. The purpose of this research are to: 1) Determine the degree of deacetylation of chitosan and modified chitosan by swelling and formaldehyde crosslinked. 2) Determine the adsorption capacity of chitosan modified by swelling and formaldehyde crosslinked in adsorption of Cu (II) metal ion. The result of the research showed that: 1) The degree of deacetylation on optimum conditions of each chitosan was 70,3% for technical chitosan; 89,7% for modified chitosan by swelling and 82,5% for chitosan formaldehyde crosslinked. 2) The adsorption capacity in the optimum condition of chitosan modified by swelling and crosslink for the adsorption metal ion Cu (II) were 77,42%, and 75,16%.

OPTIMASI KONDISI EKSTRAKSI SENYAWA AKTIF ANTIOKSIDAN DARI BIJI ANGGUR

2019 ◽  
Vol 3 (2) ◽  
pp. 35
Author(s):  
Kartini Kartini ◽  
Azminah Azminah
Keyword(s):  
Free Radical ◽  
Optimum Condition ◽  
Active Compound ◽  
Grape Seed ◽  
Free Radical Scavenger ◽  
Water Bath ◽  
Radical Scavenger ◽  
Optimum Conditions ◽  
Ethanolic Solution ◽  
Reduced Pressure

In order to prepare standardized extract, optimization of extraction conditions of grape seed has been done. These conditions are type of menstrum (50, 70 and 96% of ethanolic solution), length of extraction (1, 2 and 4 hours) also method of evaporation (reduced pressure and opened air). Activity on free radical scavenger used as parameters to determine optimum conditions. Based on EC50 (concentration which scavenge 50% amount of free radical) can be concluded that optimum condition for extracting antioxidant active compound from grape seed are 70% ethanolic solution as menstrum, length of extraction 1 hour and evaporation on opened air use water bath.

Synthesis and characterization of bio-cement from conch shell waste

2019 ◽  
Vol 212 ◽  
pp. 775-786 ◽  
Author(s):  
Chathurani Chandrasiri ◽  
Tesfamichael Yehdego ◽  
Sulapha Peethamparan
Keyword(s):  
Synthesis And Characterization ◽  
Shell Waste ◽  
Conch Shell

scholarly journals Chitin and Chitosan from Green Shell (Perna Viridis): Utilization Fisheries Wastes from Traditional Market in Jakarta

2018 ◽  
Vol 248 ◽  
pp. 04002 ◽  
Author(s):  
Flora Elvistia Firdaus ◽  
Indah Purnamasari ◽  
Pandu Gunatama
Keyword(s):  
Solid Waste ◽  
Water Content ◽  
Good Condition ◽  
Perna Viridis ◽  
Sour Taste ◽  
Degree Of Deacetylation ◽  
Organoleptic Test ◽  
Traditional Market ◽  
Chitin And Chitosan

Many advantages of burden wastes which adversely impact to the environment in the form of solid waste. Green shellfish wastes are used for resources of chitosan. The aim of this works is to identify the effectiveness of chitosan application into 2 kinds of moist foods; wet noodles and meatballs. The concentration of chitosan are 0%, 0.5%, 1%, 1.5%, and 2%. The samples are immersed for 0,15, 30, 45, and 60 minutes. The study has found the water content of chitin is 8.31% and chitosan is 6.83%. The degree of deacetylation of chitin is 37.81% and chitosan is 82%. The best concentration of chitosan for wet noodle is 1.5% -2% with the immersion of 45 -60 minutes, and for meatballs is 1.5%-2% with the immersion of 15 minutes. The organoleptic test, on day-3 noodle and meatball, is still in good condition. If no chitosan added the noodles sample is day-1 is in fair condition, while meatball should be consumed directly because in day-1 is becoming chewy with a sour taste, and on day-2 are overgrown with mushrooms.

scholarly journals Adsorption of Reactive Black M-2R on Different Deacetylation Degree Chitosan

2011 ◽  
Vol 6 (3) ◽  
pp. 155892501100600 ◽  
Author(s):  
Fang Li ◽  
Chunmei Ding
Keyword(s):  
Sorption Process ◽  
Order Kinetic ◽  
Sorption Data ◽  
Kinetic Experiment ◽  
Isotherm Equation ◽  
Degree Of Deacetylation ◽  
Deacetylation Degree ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Effects Of Temperature

Different degree of deacetylation (DD) chitosan was prepared and used for the removal of a Reactive black M-2R (RBM) from aqueous solution. The effects of temperature (298 K~323 K), chitosan dosage, degree of deacetylation on RBM removal were investigated. The adsorption equilibrium was reached within one hour. In order to determine the adsorption capacity, the sorption data were analyzed by using linear form of Langmuir, Freundlich and Tempkin isotherm equation. Langmuir equation shows higher conformity than the other two equations. From the kinetic experiment data, it was found that the sorption process follows the pseudo-second-order kinetic model. Activation energy value for sorption process was found to be 58.28 kJ mol-1. Chitosan with 66% deacetylation degree (DD) exhibited good adsorption performance for RBM. In order to determine the interactions between RBM and chitosan, FTIR analysis was also conducted.

scholarly journals Optimization Extraction of Xylocarpus granatum Stem as Antioxidant and Antiglycation

2019 ◽  
Vol 26 (2) ◽  
pp. 50
Author(s):  
Eka Winarni Sapitri ◽  
Irmanida Batubara ◽  
Utami Dyah Syafitri
Keyword(s):  
Optimum Condition ◽  
Extraction Time ◽  
Total Phenol Content ◽  
Solvent Ratio ◽  
Optimum Conditions ◽  
Solvent Concentration ◽  
Xylocarpus Granatum ◽  
Surface Response Method ◽  
High Antioxidant Activity ◽  
Response Method

Xylocarpus granatum is an Indonesian plant that has bioactives content of phenols and high antioxidant activity on it. The aim of this research was to determine the optimum condition maceration for Xylocarpus granatum stem as antioxidant and antiglycation. The optimum conditions of maceration were effected by the extraction variables (concentration, sample/solvent ratio, extraction time) were evaluated using surface response method. The optimum condition was determined from the recovery of the respons. The optimum condition of maceration is predicted to be achieved when the solvent concentration is 52.25%, the extraction time is 15.92 hours, sample/solvent ratio is 1 g/9 ml with the response (yield, total phenol content, flavonoid, inhibition for 2,2’-diphenylpicryl hydrazyl, capacity of 2,2’-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid), and inhibition antiglycation were 12.81%, 1.95 mg of gallic acid/g extract, 62.33 μg quercetin/g extract, 41.11%, 0.71 TEAC, and 112.33%, respectively). Optimization extraction conditions shows that the extraction variables have significant effect on respons so it can reduce the extraction time, economic, and produce high bioactivite constituens.

scholarly journals THE INFLUENCE OF THE DEACETYLATION DEGREE OF CHITOSAN IN THE FORM OF FLAKES ON THE EFFECTIVENESS OF NITRATES V SORPTION FROM AQUEOUS SOLUTIONS

2018 ◽  
Vol XXIII ◽  
pp. 88-96
Author(s):  
Tomasz Jóźwiak ◽  
Urszula Filipkowska ◽  
Paula Bugajska ◽  
Małgorzata Kuczajowska-Zadrożna ◽  
Artur Mielcarek
Keyword(s):  
Aqueous Solutions ◽  
Sorption Capacity ◽  
Process Time ◽  
Effect Of Ph ◽  
Maximum Sorption Capacity ◽  
Degree Of Deacetylation ◽  
Deacetylation Degree ◽  
Maximum Sorption ◽  
Sorption From Aqueous Solutions

The influence of the degree of deacetylation of chitosan from the range of DD = 75–90% on the effectiveness of sorption of nitrates from aqueous solutions was investigated. The scope of the research included: determining the effect of pH on the effectiveness of N-NO3 binding on chitosan sorbents and determining the sorption capacity of chitosan sorbents with different degrees of deacetylation after 5, 15, 30 and 60 minutes. The effectiveness of sorption of nitrates on chitosan sorbents increased in the series DD=75% < DD=85% < DD=90%. Regardless of the degree of deacetylation, the sorption effectiveness of nitrates on chitosan was the highest at pH 4. The amount of nitrate-related sorbents was the highest after 30 min of sorption. A process time which was too long resulted in desorption of nitrates. The maximum sorption capacity for chitosan with the degree of deacetylation DD = 75, 85 and 90% was 0.59 mg N-NO3/g, 0.60 mg N-NO3/g and 0.87 mg N-NO3/g, respectively.

scholarly journals Comparison of Chitosan Characterization from Mussel Shell Waste Using Varying Concentration of Solvents

2021 ◽  
Vol 5 (1) ◽  
pp. 9
Author(s):  
Nur Maulida Safitri ◽  
Andi Rahmad Rahim ◽  
Ummul Firmani
Keyword(s):  
Environmental Pollution ◽  
Food Processing ◽  
Structural Component ◽  
Ash Content ◽  
Mussel Shell ◽  
Degree Of Deacetylation ◽  
Shell Waste ◽  
Mussel Shells ◽  
High Degree ◽  
Medium Weight

Massive amounts of mussel shell waste are generated and wasted from the aquaculture processing sectors, resulting in environmental pollution. This material contains chitosan as a valuable compound characterized as a non-toxic structural component with several food processing applications or medicinal applications. In this research, mussel shells were processed using different solvents concentrations in several stages: demineralization, deproteination, decolourization, and deacetylation. Our result showed that the C2 samples gained a high degree of deacetylation (31.8±0.21%) with low moisture and ash content and medium weight of yield. Further research is recommended to purify chitosan using various instrumentation and assess its bioactivity.

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