scholarly journals PENGGUNAAN RESPONSE SURFACE METHODOLOGY PADA OPTIMASI PROSES PENGOLAHAN BAWANG MERAH IRIS IN BRINE

2019 ◽  
Vol 15 (1) ◽  
pp. 12
Author(s):  
NFN Ratnaningsih ◽  
Desty Vidiantika ◽  
Ermi Sukasih ◽  
NFN Setyadjit
Keyword(s):  
Response Surface Methodology ◽  
Citric Acid ◽  
Response Surface ◽  
Acid Concentration ◽  
Salt Concentration ◽  
Heating Time ◽  
Anthocyanin Content ◽  
Minimal Processing ◽  
Citric Acid Concentration ◽  
Design Expert

<p>Bawang merah merupakan komoditas hortikultura yang mudah rusak dan terkadang mengalami kelangkaan di pasaran. Hal ini menimbulkan masalah serius, seperti harga yang fluktuatif dan terjadinya inflasi. Citarasa bawang merah yang khas menyebabkan keberadaannya dipandang penting oleh masyarakat. Untuk mengatasi tidak kontinunya stok bawang merah di pasaran, perlu dilakukan pengolahan minimal proses, seperti pengolahan bawang merah iris in brine. Tujuan penelitian ini adalah untuk menentukan kondisi optimum proses pembuatan bawang merah iris in brine. Optimasi proses dilakukan menggunakan Response Surface Methodology (RSM). Pengolahan data menggunakan Program Design Expert 7.0 dengan tiga faktor, yaitu X1 (konsentrasi garam, %), X2 (konsentrasi asam sitrat, %) dan X3 (lama pemanasan, menit). Hasil optimal diperoleh pada kondisi konsentrasi garam 2,5%, asam sitrat 0,73% dan lama pemanasan 5 menit. Bawang merah iris in brine hasil optimasi memiliki nilai Aw 0,895; nilai chroma 16,97; pH 3,47; total padatan terlarut (TPT) 7,84 ᵒBrix dengan kandungan antosianin 20,21 ppm, kandungan senyawa volatil 91,30 ppm dan aktivitas antioksidan 154,25 ppm.</p><p> </p><p><strong>The use of Response Surface Methodology on optimization of in brine shallot slices production</strong></p><p><br />Shallot is a horticultural commodity that easily damaged and sometimes become scarcity in the market. This triggered serious problems, such as fluctuating prices and inflation. Typical of shallot flavor causes its existences to be considered as important by society. To overcome the uncontinuous stock of shallot in the market, it is necessary to process shallot using minimal processing, such as shallot slices in brine. The objective of this study was to determine the optimum condition of the shallot slices in brine making process. Optimization of the prosess was done using Response Surface Methodology (RSM). Data were processed using Design Expert 7.0, with three factors, namely X1 (salt concentration,%), X2 (citric acid concentration,%) and X3 (duration of heating, minutes). The optimization result was 0.75% citric acid concentration, 2.5% salt concentration and 5 minutes of heating time. The resulting shallot slices in brine has 0.895 of Aw value; 16.97 of Chroma value; 3.47 of pH; 7.84oBrix of total soluble solid (TSS); 20.21 ppm of anthocyanin content; 91.30 ppm of volatile reducing substances (VRS); and 154.25 ppm of antioxidant activity.</p>

scholarly journals Development of poly(vinyl alcohol)-based membranes by the response surface methodology for environmental applications

2020 ◽  
Vol 24 ◽  
pp. e5
Author(s):  
Juliana Zanol Merck ◽  
Camila Suliani Raota ◽  
Jocelei Duarte ◽  
Camila Baldasso ◽  
Janaina Da Silva Crespo ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Citric Acid ◽  
Response Surface ◽  
Acid Concentration ◽  
Vinyl Alcohol ◽  
Membrane Preparation ◽  
Poly Vinyl Alcohol ◽  
Esterification Reaction ◽  
Citric Acid Concentration ◽  
Ft Ir

The pollution of hydric sources by pharmaceuticals is an issue in many countries, particularly in Brazil. The presence of these substances causes deleterious effects on the environment and human health. One of the main sources of this contamination is domestic sewage, due to the expressive amount of medicines released in their unaltered form. Unfortunately, traditional wastewater treatment is not effective for the removal of pharmaceuticals and, for this reason, membrane technology is an attractive alternative to overcome this issue. In this regard, hydrophilic polymers, such as poly(vinyl alcohol) (PVA), are the most suitable. However, their high affinity with water causes intense swelling, leading to severe modifications in the membrane properties. In view of all these facts, the present work evaluated the swelling of PVA-based membranes, with the aim of finding the membrane preparation method that has the lowest swelling, thereby providing the most suitable characteristics for pharmaceutical removal from wastewater. The membranes were prepared by the casting of a polymeric solution, with PVA as a basis polymer, citric acid as a crosslink agent and glycerol and silver nanoparticles as performance additives. The process optimization was performed using a design of experiments with posterior analysis by the response surface methodology (RSM). The RSM assessed the effect on the membrane swelling of the factors, including citric acid concentration and the time and temperature of crosslinking. The membrane characterization was performed by Fourier-transform infrared (FT-IR) spectroscopy, scanning electron microscopy coupled with a field emission gun (SEM-FEG) and water contact angle (WCA) measurements. Overall, the condition that showed the lowest swelling was obtained with 10% of citric acid and crosslinking for 4 h at 130 °C. Under these conditions, the membrane had a mass swelling of 42% and a dimensional swelling of 24%. Additionally, our statistical analysis revealed that the factors with the dominant effects were the citric acid concentration and the temperature of crosslinking. The FT-IR analysis suggested that the crosslinking occurred by an esterification reaction, as showed by the stretching frequencies of C=O at 1710 cm-1 and ester C-O at 1230 cm-1. Moreover, the SEM-FEG images revealed a smooth and flat surface and a dense cross section with a thickness of ~113 μm. Concerning the WCA, the angle was at ~80°, which is characteristic of hydrophilic materials. Finally, the data suggested that it is possible to optimize the membrane preparation process with adequate properties so that it can be subsequently applied to the removal of pharmaceuticals from hospital wastewater.

scholarly journals OPTIMASI PRODUKSI BAWANG MERAH UTUH (Allium AscAlonicum l) IN BRINE

2019 ◽  
Vol 15 (1) ◽  
pp. 25
Author(s):  
NFN Setyadjit, M.App.Sc ◽  
NFN Risfaheri ◽  
Aisya Ayu Handayani
Keyword(s):  
Response Surface Methodology ◽  
Citric Acid ◽  
Response Surface ◽  
Water Activity ◽  
Ph Value ◽  
Heating Time ◽  
Plate Count ◽  
Anthocyanin Content ◽  
Soluble Solid ◽  
Optimum Formula

<p>Bawang merah utuh <em>in brine </em>adalah bawang merah segar yang diawetkan dalam larutan garam, asam atau keduanya. Tujuan penelitian ini adalah untuk mendapatkan konsentrasi NaCl, asam sitrat, serta waktu pasteurisasi yang optimum dalam proses pembuatan bawang merah utuh <em>in brine</em>. Optimasi ini dilakukan dengan metode <em>Response Surface Methodology </em>(RSM), didapatkan 18 variasi konsentrasi NaCl, asam sitrat, dan lama pemanasan yang kemudian dihasilkan satu formula proses optimum. Parameter respon analisis meliputi aktivitas antioksidan metode DPPH, total antosianin, kecerahan warna, kadar keasaman (pH), angka lempeng total (ALT)), aktivitas air (Aw), <em>volatile substances </em>dan total padatan terlarut. Hasil penelitian menunjukkan bahwa dengan penambahan 10% NaCl, 1% asam sitrat, dan lama pemanasan 20 menit merupakan formula yang optimum.. Dengan perlakuan tersebut bawaang merah utuh <em>in brine </em>memiliki pH 3,38, aktivitas air 1,0, TPT 15,4 °Brix, ALT 45,45 x 10² CFU/g, <em>chroma chromatic</em>)15.9, aktivitas antioksidan 191,841 ppm dengan persentase inhibisi 66.905%, total antosianin 23.83 ppm, dan <em>volatil Substance </em>4701 ppm.</p><p><strong><br /></strong></p><p><strong>Optimation of Producing Whole Shallot (<em>Allium ascalonicum </em>L) in Brine.</strong></p><p>The whole shallot in brine is fresh shallot preserved in a salt solution. The purpose of this research was to determine the optimum concentration of NaCl, citric acid and time of pasteurisation to get the optimum product, This optimation was done using Response Surface Methodology (RSM) DX7 tool programme. DX7 formulated 18 variation of NaCl, citric acid, time of pasteurization, after processing data one optimum formula was obtained. Parameters measured were antioxidant as DPPH, anthocyanin content, color, pH, total plate count, water activity and total soluble solid. The results showed that the addition of 10% salt, 1% citric acid, and 20 minutes of heating time was the optimal formula,. With this treatment the whole shallot in brine has a pH value of 3.38, a water activity of 1.0 TPT 15.4 ° Brix, ALT 45.45 x 10² CFU / g, Chromameter (chromatic) 15.9, antioxidant activity 191.841 ppm with 66.905% inhibition percentage, 23.83 ppm anthocyanin and VS 4701</p><p><strong><br /></strong></p>

scholarly journals Optimization of the Drum Drying Parameters and Citric Acid Level to Produce Purple Sweet Potato (Ipomoea batatas L.) Powder Using Response Surface Methodology

Foods ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1378
Author(s):  
Sri Sampath Janaka Senevirathna ◽  
Nurul Shazini Ramli ◽  
Ezzat Mohamad Azman ◽  
Nurul Hanisah Juhari ◽  
Roselina Karim
Keyword(s):  
Response Surface Methodology ◽  
Citric Acid ◽  
Response Surface ◽  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Antioxidant Properties ◽  
Processing Condition ◽  
Anthocyanin Content ◽  
Total Anthocyanin ◽  
Purple Sweet Potato

Purple sweet potato (PSP) is a rich source of anthocyanins, but the anthocyanin content and color can be affected by the drying method and processing condition. Response surface methodology (RSM) with a Box–Behnken design (BBD) was used to investigate the effects of citric acid (CA) concentration, steam pressure (SP) and rotation speed (DS) on the physicochemical and functional properties of drum-dried purple sweet potato powder (PSPP). The anthocyanins of the PSPP were analyzed using mass spectrometry with electrospray ionization and twelve anthocyanins were identified. The results indicated that the moisture content (4.80 ± 0.17–9.97 ± 0.03%) and water activity (0.290 ± 0.004–0.47 ± 0.001) (p < 0.05) decreased with increasing drum temperature as well as with reduced drum rotating speed. CA had a significant (p < 0.05) effect on the color and total anthocyanin content (101.83 ± 2.20–124.09 ± 2.89 mg/100 g) of the PSPP. High SP and low DS negatively affected the antioxidant properties of the PSPP. DPPH value of the PSPP ranged from 20.41 ± 0.79 to 30.79 ± 1.00 μmol TE/g. The optimal parameters were achieved at 0.59% CA, 499.8 kPa SP and 3 rpm DS.

scholarly journals OPTIMIZATION OF SWEET GUAVA (Psidium guajava, L)  USING THE ACCEPTANCE TEST, RESPONSE SURFACE METHODOLOGY AND PREFERENCE MAP

2012 ◽  
Vol 30 (1) ◽  
Author(s):  
CAMILA CARVALHO MENEZES ◽  
SORAIA VILELA BORGES ◽  
JOÃO DE DEUS SOUZA CARNEIRO ◽  
MARCELO ANGELO CIRILLO ◽  
ANA CARLA MARQUES PINHEIRO ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Citric Acid ◽  
Response Surface ◽  
Consumer Preferences ◽  
Consumer Preference ◽  
Potassium Sorbate ◽  
Acceptance Test ◽  
Citric Acid Concentration ◽  
Independent Variables ◽  
Preference Map

This study aimed to evaluate the influence of the independent variables concentration of citric acid, concentration of potassium sorbate, and pulp/sugar ratio on consumer acceptance for sweet guava. The results were analyzed using statistical methods such as preference map and response surface methodology to determine the influence of the independent variables. Response surface methodology alone proved insufficient to achieve an optimal formulation for the preparation of sweet guava. Based on preference mapping analysis, consumer preference was observed for treatments using higher concentrations of sugar and citric acid. Parameters of sweetness, appearance and texture influenced consumer preferences.   

scholarly journals Study of the Annealing Effect of Starch/Polyvinyl Alcohol Films Crosslinked with Glutaraldehyde

Gels ◽  
2021 ◽  
Vol 7 (4) ◽  
pp. 249
Author(s):  
Edgar Franco ◽  
Rosmery Dussán ◽  
Diana Paola Navia ◽  
Maribel Amú
Keyword(s):  
Response Surface Methodology ◽  
Citric Acid ◽  
Polyvinyl Alcohol ◽  
Response Surface ◽  
Crosslinking Agent ◽  
Scanning Calorimetry ◽  
Citric Acid Concentration ◽  
Elongation At Break ◽  
Heat Treated ◽  
Complementary Analysis

Films were fabricated using a mixture of polyvinyl alcohol (PVA)/cassava starch and incorporated citric acid in a concentration range between 5% and 40%. The films were annealed through thermal treatment in a temperature range between 30 °C and 90 °C with 0.3% glutaraldehyde incorporated as the crosslinking agent. This study presents the results of an experimental design analyzed using the response surface methodology. The multiple regression analysis allowed us to obtain the second-order models, which relate the annealing factors and citric acid concentration to Maximum Tensile Strength (MTS), Young’s Modulus (YM), and the Maximum Elongation at Break (MEB). The optimization and validation of the obtained model were carried out with error values below 10.08% for all the response variables, indicating that the response surface methodology and optimization were correct. Finally, as a complementary analysis, the differential scanning calorimetry (DSC) and Fourier-transform infrared spectroscopy (FTIR) tests were carried out, which revealed a higher packaging of the heat-treated films and verified their crosslinking.

scholarly journals Optimization of Betalain Pigments Extraction Using Beetroot by-Products as a Valuable Source

Inventions ◽  
2021 ◽  
Vol 6 (3) ◽  
pp. 50
Author(s):  
Silvia Lazăr (Mistrianu) ◽  
Oana Emilia Constantin ◽  
Nicoleta Stănciuc ◽  
Iuliana Aprodu ◽  
Constantin Croitoru ◽  
...  
Keyword(s):  
Citric Acid ◽  
Acid Concentration ◽  
Ethanol Concentration ◽  
Extraction Process ◽  
Extraction Time ◽  
Quadratic Model ◽  
Citric Acid Concentration ◽  
Operating Variables ◽  
Conventional Solvent Extraction ◽  
Optimized Conditions

(1) Background: This study is designed to extract the bioactive compounds from beetroot peel for future use in the food industry. (2) Methods: Spectrophotometry techniques analyzed the effect of conventional solvent extraction on betalains and polyphenolic compounds from beetroot peels. Several treatments by varying for factors (ethanol and citric acid concentration, temperature, and time) were applied to the beetroot peel samples. A Central Composite Design (CCD) has been used to investigate the effect of the extraction parameters on the extraction steps and optimize the betalains and total polyphenols extraction from beetroot. A quadratic model was suggested for all the parameters analyzed and used. (3) Results: The maximum and minimum variables investigated in the experimental plan in the coded form are citric acid concentration (0.10–1.5%), ethanol concentration (10–50%), operating temperature (20–60 °C), and extraction time (15–50 min). The experimental design revealed variation in betalain content ranging from 0.29 to 1.44 mg/g DW, and the yield of polyphenolic varied from 1.64 to 2.74 mg/g DW. The optimized conditions for the maximum recovery of betalains and phenols were citric acid concentration 1.5%, ethanol concentration 50%, temperature 52.52 °C, and extraction time 49.9 min. (4) Conclusions: Overall, it can be noted that the extraction process can be improved by adjusting operating variables in order to maximize the model responses.

scholarly journals Assessment of TiO2 Nanoconcentration and Twin Impingement Jet of Heat Transfer Enhancement—A Statistical Approach Using Response Surface Methodology

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 595
Author(s):  
Mahir Faris Abdullah ◽  
Rozli Zulkifli ◽  
Hazim Moria ◽  
Asmaa Soheil Najm ◽  
Zambri Harun ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Response Surface Methodology ◽  
Response Surface ◽  
Heat Transfer Rate ◽  
Transfer Rate ◽  
Tio2 Nanoparticle ◽  
Experimental Results ◽  
Improvement Rate ◽  
Design Expert ◽  
Impingement Jet

Impinging jets are considered to be a well-known technique that offers high local heat transfer rates. No correlation could be established in the literature between the significant parameters and the Nusselt number, and investigation of the interactions between the correlated factors has not been conducted before. An experimental analysis based on the twin impingement jet mechanism was achieved to study the heat transfer rate pertaining to the surface plate. In the current paper, four influential parameters were studied: the spacing between nozzles, velocity, concentration of Nano solution coating and nozzle-plate distance, which are considered to be effective parameters for the thermal conductivity and the heat transfer coefficient of TiO2 nanoparticle, an X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) analysis were done, which highlighted the structure and showed that the nanosolution coated the surface homogenously. Moreover, a comparison was done for the experimental results with that of the predicted responses generated by the Design Expert software, Version 7 User’s Guide, USA. A response surface methodology (RSM) was employed to improve a mathematical model by accounting for a D-optimal design. In addition, the analysis of variance (ANOVA) was employed for testing the significance of the models. The maximum Nu of 91.47, where H = S = 1 cm; Reynolds number of 17,000, and TiO2 nanoparticle concentration of 0.5% M. The highest improvement rate in Nusselt was about 26%, achieved with TiO2 Nanoparticle, when S = 3 cm, H = 6 cm and TiO2 nanoparticle = 0.5 M. Furthermore, based on the statistical analysis, the expected values were found to be in satisfactory agreement with that of the empirical data, which was conducted by accounting for the proposed models’ excellent predictability. Multivariate approaches are very useful for researchers, as well as for applications in industrial processes, as they lead to increased efficiency and reduced costs, so the presented results of this work could encourage the overall uses of multivariate methods in these fields. Hypotheses: A comparison was done for the predicted responses generated by the Design Expert software with the experimental results and then studied to verify the following hypotheses: ► Preparation of three concentrations of TiO2 nanosolution was done and studied. ► The heat transfer rate could be increased by surface coating with TiO2 nanoparticle. ► The heat transfer could be improved by the impingement jet technique with suitable adjustments.

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