A response surface method was used to optimize the microwave-assisted extraction parameters such as time (t) (min), solvent (methanol) concentration (S) (v/v) and microwave power level (MP) for of antioxidants from potato peels. Max. total phenolics content 3.94 mg g⁻¹ dry weight (dw) obtained at S 67.33%, t 15 min a MP 14.67%. For ascorbic acid (1.44 dw), caffeic (1.33 ferulic (0.50 dw) max contents were 100%, min, 10%, while chlorogenic (1.35 5 10%. The radical scavenging activity extract...

This study evaluated the effect of thermal and high electric field stresses on secondary structure conformation peanut protein using Fourier transform infrared spectroscopy. The amide I region between wavelengths 1700–1600 cm–1 spectra were studied for different treatments. Within treatments, both hot air roasting microwave processing treatments evaluated. Hot performed at temperatures 50, 75, 100°C from 15, 30, 45 min while conducted same temperatures, but 5, 10, 20 min. Three experimental...

Soymilk is lower in calories compared to cow's milk, since it derived from a plant source (no cholesterol) and an excellent of protein. Despite the beneficial factors, soymilk considered as one most controversial foods world. It contains serine protease inhibitors which its nutritional value digestibility. Processing techniques for elimination trypsin lipoxygenase, have shorter processing time production costs are required large-scale manufacturing soymilk. In this study, suitable conditions...

A lab model vacuum-assisted solar dryer was developed to study the drying kinetics of tomato slices (4, 6, and 8 mm thicknesses) compared with open sun under weather conditions Montreal, Canada. The showed that time taken for 4, thicknesses from initial moisture content 94.0% final around 11.5 ± 0.5% (w.b.) 360, 480, 600 min in 450, 600, 750 drying, respectively. During it observed temperature inside vacuum chamber increased 48°C when maximum ambient only 30°C. quality dried superior terms...

Drying of pineapple by microwave-vacuum (MW-V) with osmotic dehydration (OD) as a pretreatment was studied. Central composite design used for the independent variables sugar concentration (40, 50, and 60 °Brix), immersion time (0, 3, 6 hours) product temperature in microwave cavity (50, 60, 70°C). The dependent were moisture content, shrinkage, rehydration coefficient, visual quality, color, texture. also evaluated respect to weight reduction (WR), water loss (WL), solid gain (SG)....

Abstract In this study, the fresh Moringa oleifera pods (Drumsticks) were dehydrated by microwave-assisted hot air drying (MAHD) and conventional methods. The samples dried at three different temperatures, viz. 50, 60, 70°C, with without application of microwaves. Microwave power density 1 W/g was used for MAHD. final moisture content targeted as 13% wb. curves rate plotted compared. kinetics obtained experimentally correlated Page equation. constants K N equation determined to predict...

Shrimp, a most consumed seafood, when processed, results in an enormous generation of wastes. Current ways shrimp waste utilization are uneconomical and far from being environmentally friendly. Alternative sustainable technologies to utilize wastes completely essential. Hydrothermal carbonization (HTC) that converts moisture-rich biomass into hydrochar is mostly employed for pure lignocellulosic biowaste. However, the suitability HTC produce good quality non-lignocellulosic such as unknown....

In order to discourage the use of chemicals in raisin processing, effect microwave and pulsed electric field (PEF) pretreatments on drying rate other quality parameters like color, total soluble solids, bulk density, appearance, market were compared with that chemically pretreated raisins dried at 65°C. The untreated samples had a statistically significant difference (P < 0.05). was highest when others. results showed PEF microwave-treated significantly high Total Soluble Solids (TSS), along...

In the last few decades, researchers have found blueberry leaves to be an interesting source of different phenolic compounds, and drying is important part their postharvest sample preparation processes. current study, were dried using microwave-assisted hot air or alone at 45, 60, 75°C 10–15% wet basis. Corresponding characteristics determined by fitting moisture ratio obtained in each case with eight theoretical semitheoretical models for microwave stages. It was observed that best depended...

The dielectric properties of a methanol-water mixture were measured at different temperatures from 20 to 80 °C two frequencies 915 MHz and 2450 MHz. These are most commonly used on industrial domestic scales respectively. In this study, the found be dependent temperature, solvent concentration, presence plant matrix. Linear quadratic equations developed establish dependency between factors. At MHz, constant mixtures was significantly affected by concentration methanol rather than whereas...

Abstract Microwave drying of corn (Zea mays L. ssp.) was conducted in this study and its germination tested after drying. The objective the test to determine an optimum microwave method for seeds achieve maximum minimum time, as well obtain temperature that can best results without reducing viability. different methods used included constant at 30, 40, 50°C; intermittent power drying; fixed 2, 3, 3.5, 4 W/g. started with initial moisture content 33% (wb) ended a final 16% (wb). In method,...