Chitosan is a naturally occurring cationic biopolymer, obtained by alkaline deacetylation of chitin. This research aims to investigate the toxicity, antioxidant activity and antibacterial chitosan from shrimp In this study, chitin extracted waste material. Chitin then with 60% NaOH so that produced. Degrees deacetylation, molecular weight, toxicity test, antimicrobial evaluated. Toxicity test using Brine Shrimp Lethality Test. The analysis was performed DPPH method (2,...

Abstract Enzyme immobilizations were widely used to increase their shelf life which is essential for the world’s industries. Therefore, amylase immobilized using Na-alginate as a matrix necessary optimized and characterized. The parameters measured in optimization of immobilization are determination concentration sodium alginate contact time. Characterizations conducted determine optimum substrate, value V max , Michaelis-Menten constant (K M ), pH, temperature, incubation time, test reuse....

A research on optimizing the synthesis conditions to obtain carboxymethyl chitosan with highest solubility in 1%(v/v) acetic acid solvent have been performed. Optimization was performed by varying: concentration of NaOH during alkalizing chitosan, chitosan: monochloroacetic ratio, temperature and reaction time. This study uses a full factorial experimental design. The results showed that found 40% (w/v) concentration, ratio 1:7, 80°C time at 4 hours up 63.78 mg /mL. IR 1H-NMR spectra gave...

Background: Chitosan is a natural polymer which has limited solubility. capable of being modified using multiple alternatives for chitosan chemical modifications that provide different desirable properties. Method: N-methyl was successfully prepared and characterized. characterized by the FTIR, XRD, SEM, TEM, solubility, water content, specific surface area. Antifungal activity against Candida albicans gauze coated were also determined in this study. The antifungal tests performed agar...

Chitosan is the N-deacetylated derivative of chitin. biodegradable, biocompatible and non-toxic. polycationic in acidic media give antibacterial activity. In this paper, activity chitosan have been studied.Chitosan had isolated from white shrimp. Antibacterial solutions was examined against S. aureus The result showed that antimicrobial effect on strengthened as choitosan concentrate decreased.

Chitosan is biopolymer obtained from chitin deacetylation reaction. Chitin a constituent of shrimps’ outer shell. modification using crosslinker agent could increase the active groups and stabilize physical character. One non-toxic crosslink agents was tripolyphosphate. This study aimed at synthesizing tripolyphosphate crosslinked chitosan (TPP-Cs) to test antioxidant toxicity. Synthesizing conducted ionic gelation method. The activity studied DPPH radicals scavenging ability inhibit...

<p>Telah dilakukan uji aktivitas antioksidan dari N-metil kitosan yang memiliki kelarutan tinggi. Uji dengan menggunakan metode DPPH (1,1-diphenyl-2-pikrilhidrazil) dan FTC (<em>ferric thiocyanate</em>). Optimasi sintesis untuk memperoleh Hasil penelitian menunjukkan bahwa berkelarutan paling tinggi adalah disintesis 1,7 mL formaldehid 10%. Berdasarkan hasil dapat diketahui merupakan sedang nilai IC<sub>50</sub> sebesar 145,398 ppm. pengujian kemampuan...

A research on optimizing conditions to cholesterol adsorbed have been performed. Optimization was performed by varying: contact time, adsorbent weight and temperature of the system's. full factorial experimental design used in this study. Characterization synthesized chitosan carboxymethyl including FTIR, water content, ash solubility, porosity, swelling effect. The results showed that able adsorb under optimal with ratio (1:200) a time 90 minutes at 40 °C. Meanwhile, 55 °C capable (1:300)...

Malachite green dye is widely used in the textile industry. Wastewater contaminated with malachite threatens aquatic life and human health. Therefore, adsorption needed waste treatment process. This research aims to synthesize magnetic carboxymethyl chitosan as an adsorbent for dye. Magnetic was synthesized via a coprecipitation method analyzed using FTIR. Batch experiments were study of under parameters, such effects pH time, kinetics, isotherms, reusability. The results show that at 4,...

The silver orthophosphate was successfully synthesized using the starting materials of AgNO3, KH2PO4 under water and dimethyl sulfoxide (DMSO) solvents. variation DMSO in designed at 0, 5, 10, 15, 20 100% (v/v). products were characterized by XRD, DRS, SEM. photocatalytic properties evaluated blue light irradiation methyl orange degradation. results showed that significantly affected morphology, particle size bandgap energy Ag3PO4. addition decreased Ag3PO4 changed tetrahedron into an...

Chitosan is polycationic in acidic media and can interact with negatively charged species such as tripolyphosphate (TPP), which a nontoxic crosslinking agent. The synthesis of TPP crosslinked chitosan was perfomed by reacting solution (pH 3) solution. aim this study to prepared characterize the chitosan-tripolyphosphate samples. Characterization included determination water ash degree, moreover powder FTIR XRD spectroscopy. result showed that process efficiency 88.49%, degree were 25.70...

Degradasi zat warna kongo merah limbah cair industri tekstil menggunakan metode elektrodekolorisasi telah dilakukan. Eksperimen dilakukan dengan mengelektrolisis katoda karbon dan anoda besi. Analisis konsentrasi spektrofotometri. Hasil penelitian menunjukkan bahwa dibawah kondisi optimum pada voltase 12 V- jarak elektroda 1 cm-pH 4- H2O2500 mg/L selama menit, red dapat didegradasi 99,83 %. Metode ini digunakan untuk mendegradasi merah.

Chitosan was synthesized from chitin and applied to remove dye contaminants. The dyes used in this study were methyl orange malachite green. adsorption experiment carried out a batch system by studying the effect of pH, contact time strength. concentration measured with UV-Visible spectrophotometer. able reduce levels 48.36% after 120 minutes pH 3 solution. also green 76.04% 100 5 removal MO MG contaminants wastewater chitosan-based adsorbents is very promising be widely as an adsorbent for...

Urease is an enzyme that catalyzes the hydrolysis reaction of urea to ammonia and carbon dioxide. used in this study extracted from seeds kidney beans (Phaseolus vulgaris L). The efficiency urease increased by immobilization using a chitosan-bentonite matrix. This research aims increase effectiveness bean chitosan bentonite. preliminary was extraction at various germination times. activity determined Nessler's reagent characterized spectrophotometer. with optimum obtained seed time 8 days....

Synthesis of ferrate and its application to azo dyes degradation have been investigated. The synthesis was carried out by reacting Fe(NO3)3 solution with NaOCl in alkaline condition. Oxidation reaction adjusting the molar ratio dyes. When reacted dyes, absorbance monitored using UV-Vis spectrophotometer at pH condition that had optimized. Kinetics study for maximum as a function time. Ferrate can oxidize methyl oranye effectively optimum 9.6. With ferrate/azo 5/1, it showed percentages...

Chitin is one of the most abundant natural polysaccharides produced by many living organisms; it usually found as a component crustacean shells. In this paper, have been isolated from white shrimp (Litophenaeus vannamei). The preparation chitin using chemical products to deproteinize and demineralize source material. Characterization included determination water, ash, fat protein degree; moreover powder characterize with FTIR XRD spectroscopy. result showed that process efficiency vannamei)...

N-metil kitosan merupakan derivat kitosan. Muatan polikationik dapat bereaksi dengan muatan negatif seperti kolesterol. Penelitian ini bertujuan untuk sintesis dan mempelajari adsorpsi kolesterol oleh Dalam penelitian telah dilakukan dari yang memiliki derajat deasetilasi sebesar 95% melalui mekanisme reduktif aminasi. Berdasarkan hasil diperoleh kadar air 5,17%, bobot molekul 130.106,8 g/mol, indeks swelling 495,039%. kemudian diuji kemampuan adsorpsinya terhadap . Studi berupa kinetika...

Carboxymethyl chitosan has antimicrobial activity. The solubility of carboxymethyl makes it easy to apply as a food preservative. Sausage is processed product meat, and classifiedas perishable food. purpose this study was synthesize chitosan, investigate the microbiological quality shelf-life homemade sausage treated with chitosan. obtainedthrough process carboxymethylation alkaline monochloroacetic acid. Chitosan in synthesizedfrom shrimp skin. Sausages then measured water content, ash TPC...

<p>Telah dilakukan uji aktivitas antioksidan dari N-metil kitosan yang memiliki kelarutan tinggi. Uji dengan menggunakan metode DPPH (1,1-diphenyl-2-pikrilhidrazil) dan FTC (<em>ferric thiocyanate</em>). Optimasi sintesis untuk memperoleh Hasil penelitian menunjukkan bahwa berkelarutan paling tinggi adalah disintesis 1,7 mL formaldehid 10 %. Berdasarkan hasil dapat diketahui merupakan sedang nilai IC<sub>50</sub> sebesar 145,398 ppm. pengujian kemampuan...