scholarly journals The β-cyclodextrin-modified nanosized ZSM-5 zeolite as a carrier for curcumin

RSC Advances ◽  
2019 ◽  
Vol 9 (55) ◽  
pp. 32348-32356 ◽  
Author(s):  
Shahin Amani ◽  
Amir Bagheri Garmarudi ◽  
Niloofar Rahmani ◽  
Mohammadreza Khanmohammadi
Keyword(s):  
Experimental Design ◽  
Hydrothermal Method ◽  
Fractional Factorial ◽  
Optimum Conditions ◽  
Factorial Experimental Design ◽  
Fractional Factorial Experimental Design

Herein, the nanosized ZSM-5 zeolite was synthesized based on a fractional factorial experimental design by a hydrothermal method to study the optimum conditions for the synthesis and formation of the ZSM-5 zeolite by employing different conditions.

Screening of factors affecting reactive blue 19 decolorization byGanodermasp.using fractional factorial experimental design

2010 ◽  
Vol 22 (1-3) ◽  
pp. 22-29 ◽  
Author(s):  
Mehran Mohammadian Fazli ◽  
Ali Reza Mesdaghinia ◽  
Kazem Naddafi ◽  
Simin Nasseri ◽  
Masoud Yunesian ◽  
...  
Keyword(s):  
Experimental Design ◽  
Fractional Factorial ◽  
Factorial Experimental Design ◽  
Factors Affecting ◽  
Reactive Blue 19 ◽  
Fractional Factorial Experimental Design

scholarly journals Quality by design approach for simultaneous determination of original active pharmaceutical ingredient quinabut and its impurities by using HPLC. Message 1

Pharmacia ◽  
2021 ◽  
Vol 68 (1) ◽  
pp. 79-87
Author(s):  
Оlena Golembiovska ◽  
Oleksii Voskoboinik ◽  
Galina Berest ◽  
Sergiy Kovalenko ◽  
Liliya Logoyda
Keyword(s):  
Experimental Design ◽  
Simultaneous Determination ◽  
Analytical Method ◽  
Mobile Phase ◽  
Phosphate Buffer Solution ◽  
Fractional Factorial ◽  
Factorial Experimental Design ◽  
Column Temperature ◽  
Fractional Factorial Experimental Design

Aim. The aim of study was to develop and validate a simple, highly robust (quality by design (QbD) approach), precise and accurate method using high performance liquid chromatography for the simultaneous determination of original active pharmaceutical ingredient Quinabut and its impurities. Materials and methods. Experiments were performed on a Shimadzu LC-20 Prominence HPLC separation module, equipped with a quaternary gradient pump, temperature controlled column heater, sampler manager and diode array detector and LC-20 Chemstation for data analysis (Shimadzu Corporation, Japan). Same software was used for data acquisition and processing of results. X-Terra RP18 (4.6×150 mm, 5 μm) analytical chromatographic column provided by Waters Corporation (Milford, MA) was used for all optimization experiments. Mobile phase A: acetonitrile R. Mobile phase B: 0.025 M phosphate buffer solution. Samples were chromatographed in gradient mode. Flow rate of the mobile phase: 0.7 mL/min. Column temperature: 40 °С. Detection: at 233 nm wavelength. Injection volume: 50 μl. Results. Screening of the influence of four chromatographic factors on different chromatographic responses was performed as the initial step of analytical method optimization. A randomized fractional factorial experimental design (24–1) of resolution IV with central point was used. Buffer pH, amount of acetonitrile in mobile phase A, the amount of phosphate buffer solution in mobile phase B and column temperature were selected as factors of interest, and were used to generate the fractional factorial experimental design. Linearity was established in the range of LOQ level to 0.2% having regression coefficients 0.9977. Calibration curve – y = 0.0132 + 0.9902. Since Δt for the content of quinabut is less than max δ, the technique is stable over time. The possibility of contamination of the sample by decomposition products by keeping it under stressful conditions (irradiation of the substance solution with UV light (UV irradiation with mercury lamp light); acid hydrolysis with 0.1 M hydrochloric acid solution; oxidative decomposition) was investigated. As a result of the irradiation with UV light, the impurity peaks for about 8.74 min (impurity C) and 12.68 min (impurity B) are additionally revealed. Their content exceeds the limits of normalization and is 0.6% and 3.7%, respectively. Therefore, the powder of the substance and its solutions should be stored away from direct sunlight. The column temperature and the speed of the mobile phase within ± 10% did not significantly affect the test results. The results were found to be within the assay variability limits during the entire process. Conclusion. 1) The optimization of a new analytical method capable of simultaneous determination of quinabut assay and its impurities drug products was performed with a single fractional factorial experimental design. Only 11 experiments were needed for the optimization, while at least 16 experiments would be needed to cover the same analytical method operational region of the first optimization step with a traditional one factor at time (OFAT) approach. 2) HPLC method was developed and validated for the simultaneous detection and quantitation of quinabut and its impurities. 3) The final analytical method optimized with QbD approach was validated according to ICHQ2R1 guideline. The method proved to be sensitive, selective, precise, linear, accurate and stability-indicating. 4) The method was successfully applied to the analysis of demonstrating acceptable precision and adequate sensitivity for the detection and quantitation of quinabut and its impurities. So it may be reasonable to claim that the method can be extended to the analysis of drug formulations and stability samples as well. This optimization reflects in saving of time and resources since one stability study includes hundreds of samples tested during the product’s shelf life.

scholarly journals Optimization of biomass pretreatments using fractional factorial experimental design

2018 ◽  
Vol 11 (1) ◽  
Author(s):  
Camila A. Rezende ◽  
Beatriz W. Atta ◽  
Marcia C. Breitkreitz ◽  
Rachael Simister ◽  
Leonardo D. Gomez ◽  
...  
Keyword(s):  
Experimental Design ◽  
Fractional Factorial ◽  
Factorial Experimental Design ◽  
Fractional Factorial Experimental Design

scholarly journals Utilization of Quarry Dust and Calcareous Fly Ash for the Production of Lightweight Cellular Micro-Concrete—Synthesis and Characterization

Buildings ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 214
Author(s):  
Athanasia Soultana ◽  
Michael Galetakis
Keyword(s):  
Thermal Conductivity ◽  
Fly Ash ◽  
Design Methodology ◽  
Characteristic Property ◽  
Fractional Factorial ◽  
Synthesis And Characterization ◽  
Conductivity Measurements ◽  
Factorial Experimental Design ◽  
Fractional Factorial Experimental Design ◽  
Quarry Dust

This study aims to assess the production of cellular micro-concrete, consisting of quarry dust, calcareous fly ash, cement, and aluminum powder as aerating agent. The proposed mixture design methodology is based on a Box–Behnken fractional factorial experimental design. Testing of specimens included compressive and flexural strength, density, water absorption, and thermal conductivity measurements. Results indicate that density is a characteristic property which determines all the measured properties. Aerating agent to cement and fly ash ratio has the strongest effect on all the measured properties. The developed methodology is a valuable tool for the production of cellular micro-concrete with predetermined properties by utilizing large amounts of quarry dust.

scholarly journals Optimum conditions for copper extraction from the flotation waste using factorial experimental design

2012 ◽  
Vol 38 (4) ◽  
Author(s):  
Ivan Mihajlovic ◽  
Nada Štrbac ◽  
Predrag Đorđević ◽  
Aleksandra Mitovski ◽  
Đjordje Nikolić ◽  
...  
Keyword(s):  
Experimental Design ◽  
Copper Extraction ◽  
Optimum Conditions ◽  
Factorial Experimental Design
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