The Experts below are selected from a list of 55578 Experts worldwide ranked by ideXlab platform
Dawen Sun - One of the best experts on this subject based on the ideXlab platform.
-
prediction of Moisture content uniformity of microwave vacuum dried mangoes as affected by different shapes using nir hyperspectral imaging
Innovative Food Science and Emerging Technologies, 2016Co-Authors: Dawen SunAbstract:Abstract The prediction of Moisture content uniformity on mango slices as affected by four different shapes (square, rectangle, regular triangle, and round shape) during microwave-vacuum drying (MVD) was investigated using near-infrared hyperspectral imaging in combination with multivariate chemometric analysis. Applying spectral pretreatment of a 2nd derivative followed by mean-center to raw spectra was found to be greatly beneficial for the reduction of noise and scattering levels. Seven wavelengths (951, 977, 1138, 1362, 1386, 1420, and 1440 nm) with larger absolute values of regression coefficients derived from a partial least square regression model were identified as feature variables for Moisture prediction. An optimized model based on the selected wavelengths was developed using multivariate linear regression, achieving a high prediction accuracy with Rp2 = 0.993 and RMSEP = 1.282%. From the Moisture Distribution map, a similar non-uniform drying pattern was found on square, rectangle and regular triangle-shaped samples, while round-shaped mango slices achieved better drying results. Industrial relevance The current study suggested that NIR hyperspectral imaging was a promising technique in predicting the Moisture content of mango slices during MVD, and non-uniformity of Moisture Distribution and the effect of sample geometry should be taken into account when the microwave-vacuum method is implemented in drying.
-
vis nir hyperspectral imaging in visualizing Moisture Distribution of mango slices during microwave vacuum drying
Food Chemistry, 2015Co-Authors: Dawen SunAbstract:Abstract Mango slices were dried by microwave-vacuum drying using a domestic microwave oven equipped with a vacuum desiccator inside. Two lab-scale hyperspectral imaging (HSI) systems were employed for Moisture prediction. The Page and the Two-term thin-layer drying models were suitable to describe the current drying process with a fitting goodness of R 2 = 0.978. Partial least square (PLS) was applied to correlate the mean spectrum of each slice and reference Moisture content. With three waveband selection strategies, optimal wavebands corresponding to Moisture prediction were identified. The best model RC-PLS-2 ( R p 2 = 0.972 and RMSEP = 4.611%) was implemented into the Moisture visualization procedure. Moisture Distribution map clearly showed that the Moisture content in the central part of the mango slices was lower than that of other parts. The present study demonstrated that hyperspectral imaging was a useful tool for non-destructively and rapidly measuring and visualizing the Moisture content during drying process.
Shadrack O Nyawade - One of the best experts on this subject based on the ideXlab platform.
-
effect of potato hilling on soil temperature soil Moisture Distribution and sediment yield on a sloping terrain
Soil & Tillage Research, 2018Co-Authors: Shadrack O Nyawade, N K Karanja, Charles K K Gachene, Elmar Schultegeldermann, M ParkerAbstract:Abstract Soil erosion rates are exacerbated in sloping arable lands of Central Kenya due mainly to the high soil disturbance caused by potato hilling. A field study was conducted in runoff plots to quantify the effect of potato hilling on soil loss, soil Moisture Distribution and soil temperature. Three hilling practices; hilling performed at before crop emergence (pre-hilling), one-pass hilling (at 15 days after potato emergence), the conventional two-pass hilling (at 15 and 30 days after potato emergence), and the control (non-hilling) constituted the treatments. Root length density, vegetal cover, soil surface roughness and soil water infiltration capacity were quantified at different stages of potato growth and related with the sediment yield. Soil temperature and soil Moisture contents were monitored using Onset HOBO sensor probes throughout the potato growth cycle. Compared to the conventional two-pass hilling, pre-hilling increased the soil Moisture content by 6% and lowered the soil temperature by up to 3.4 °C at crop emergence, thus optimized tuber germination and growth. This ensured earlier canopy closure and reduced the cumulative sediment yield by 12 t/ha. The increased surface roughness resulting from pre-hilled ridges puddled the surface water and increased the soil water infiltration rate by 7 to 9 mm/hr compared to the non-hilled plots. Planting potatoes in pre-hilled plots has a potential to optimize the soil temperature and soil Moisture conditions and can reduce the high soil erosion rates in sloping arable lands.
M Parker - One of the best experts on this subject based on the ideXlab platform.
-
effect of potato hilling on soil temperature soil Moisture Distribution and sediment yield on a sloping terrain
Soil & Tillage Research, 2018Co-Authors: Shadrack O Nyawade, N K Karanja, Charles K K Gachene, Elmar Schultegeldermann, M ParkerAbstract:Abstract Soil erosion rates are exacerbated in sloping arable lands of Central Kenya due mainly to the high soil disturbance caused by potato hilling. A field study was conducted in runoff plots to quantify the effect of potato hilling on soil loss, soil Moisture Distribution and soil temperature. Three hilling practices; hilling performed at before crop emergence (pre-hilling), one-pass hilling (at 15 days after potato emergence), the conventional two-pass hilling (at 15 and 30 days after potato emergence), and the control (non-hilling) constituted the treatments. Root length density, vegetal cover, soil surface roughness and soil water infiltration capacity were quantified at different stages of potato growth and related with the sediment yield. Soil temperature and soil Moisture contents were monitored using Onset HOBO sensor probes throughout the potato growth cycle. Compared to the conventional two-pass hilling, pre-hilling increased the soil Moisture content by 6% and lowered the soil temperature by up to 3.4 °C at crop emergence, thus optimized tuber germination and growth. This ensured earlier canopy closure and reduced the cumulative sediment yield by 12 t/ha. The increased surface roughness resulting from pre-hilled ridges puddled the surface water and increased the soil water infiltration rate by 7 to 9 mm/hr compared to the non-hilled plots. Planting potatoes in pre-hilled plots has a potential to optimize the soil temperature and soil Moisture conditions and can reduce the high soil erosion rates in sloping arable lands.
Baodong Zheng - One of the best experts on this subject based on the ideXlab platform.
-
Moisture Distribution model describes the effect of water content on the structural properties of lotus seed resistant starch
Food Chemistry, 2019Co-Authors: Chuanjie Chen, Qing Chang, Baodong Zheng, Yi Zhang, Hongliang ZengAbstract:Abstract The objective was to utilize a Moisture Distribution model to summarize the influence of water content on the structural properties of lotus seed resistant starch. The result showed that water content affected the composition of resistant starch. The compact structure was observed on the surface of resistant starch prepared with 50% water content; other samples displayed a flake structure. Compared with samples prepared with insufficient (50% and 60%) or excess water (95% and 90%), resistant starches prepared with 70% and 80% water content were composed of higher-molecular-weight chains and consisted of more double helix and crystal. Two corresponding relationships between the structural properties of resistant starch and the water Distribution in them were found. Bound water was related to the hydrated starch chains, while channel water in B-type crystal represented the micro-crystalline structure. Therefore, Moisture Distribution model can be feasibly used to depict the structural properties of resistant starch.
-
microwave vacuum drying of lotus seeds effect of a single stage tempering treatment on drying characteristics Moisture Distribution and product quality
Drying Technology, 2017Co-Authors: Yingting Zhao, Baodong Zheng, Weiwei Wang, Jingyi Xie, Song Miao, Yafeng Zheng, Weijing Zhuang, Yuting TianAbstract:ABSTRACTThis study evaluated the effects of a single-stage tempering treatment during microwave vacuum drying (MVD) on drying characteristics and quality of lotus (Nelumbo nucifera Gaertn.) seeds using two parameters: intermediate Moisture content (IMC) and tempering temperature (4 and 25°C). Magnetic resonance imaging (MRI) was used to examine Moisture migration and Distribution in individual lotus seed during tempering. Results from MRI showed tempering could reduce the Moisture gradient in lotus seeds during MVD. The tempering treatments led to increased Moisture diffusivity (3.96–43.56%) and a shortened drying time (6.25–31.25%) when compared with continuous MVD. Furthermore, tempered samples exhibited a greater rehydration capacity, a limited overall color change, and increased amounts of taste-active amino acids when compared with nontempered lotus seeds. High IMC improved rehydration ratios of dried samples. Low tempering temperature provided favorable free amino acid content and desirable product ...
Elmar Schultegeldermann - One of the best experts on this subject based on the ideXlab platform.
-
effect of potato hilling on soil temperature soil Moisture Distribution and sediment yield on a sloping terrain
Soil & Tillage Research, 2018Co-Authors: Shadrack O Nyawade, N K Karanja, Charles K K Gachene, Elmar Schultegeldermann, M ParkerAbstract:Abstract Soil erosion rates are exacerbated in sloping arable lands of Central Kenya due mainly to the high soil disturbance caused by potato hilling. A field study was conducted in runoff plots to quantify the effect of potato hilling on soil loss, soil Moisture Distribution and soil temperature. Three hilling practices; hilling performed at before crop emergence (pre-hilling), one-pass hilling (at 15 days after potato emergence), the conventional two-pass hilling (at 15 and 30 days after potato emergence), and the control (non-hilling) constituted the treatments. Root length density, vegetal cover, soil surface roughness and soil water infiltration capacity were quantified at different stages of potato growth and related with the sediment yield. Soil temperature and soil Moisture contents were monitored using Onset HOBO sensor probes throughout the potato growth cycle. Compared to the conventional two-pass hilling, pre-hilling increased the soil Moisture content by 6% and lowered the soil temperature by up to 3.4 °C at crop emergence, thus optimized tuber germination and growth. This ensured earlier canopy closure and reduced the cumulative sediment yield by 12 t/ha. The increased surface roughness resulting from pre-hilled ridges puddled the surface water and increased the soil water infiltration rate by 7 to 9 mm/hr compared to the non-hilled plots. Planting potatoes in pre-hilled plots has a potential to optimize the soil temperature and soil Moisture conditions and can reduce the high soil erosion rates in sloping arable lands.