Physicochemical properties of Polygonum multiflorum Thunb. root powder produced with different carrier agents

Polyphenol is a valuable compound found in plants. Unfortunately, it is quite sensitive to heat, light and oxygen in the air. This is a disadvantage making the storage of these compounds for longer periods of time difficult. However, this problem can be overcome by encapsulation with carrier agents as maltodextrin, gum arabic, modified starch, etc. The efficiency of maltodextrin (MD, DE16-19) and gum arabic (GA) on spray drying of Polygonum multiflorum Thunb. root extract was investigated. The incorporation of gum arabic to the extract had the total polyphenol content (TPC) and antioxidant capacity (AC) higher than maltodextrin. The obtained powders from gum arabic and maltodextrin were analyzed for encapsulation yield, moisture content, color parameters, total phenolic content, antioxidant capacity, bulk density, wettability, hygroscopicity, water solubility index, particle size and microstructure. The results showed the types of carrier agents which significantly affected the physicochemical properties of powders produced by spray drying

Mapping groundwater potential zones in Kanchanaburi Province, Thailand by integrating of analytic hierarchy process, frequency ratio, and random forest

At the basic level, groundwater potential zone (GWPZ) mapping plays an important role in sustainable water resource management. There are different approaches to delineating GWPZ, and each has unique advantages and disadvantages. Incorporating these approaches into an ensemble could provide a more efficient tool for GWPZ evaluation and mapping. In this study, the frequency ratio (FR), random forest (RF), and analytic hierarchy process (AHP) models, and their ensemble were compared in delineating GPWZs in Kanchanaburi Province, Thailand. These models predicted the potential of groundwater yield at > 10 m3/h and were trained based on the measured groundwater yield of 1,601 wells in the study region, coupled with the spatial data of eight influencing factors, including altitude, distance to faults, distance to waterbodies, geology, land use, rainfall, soil type, and slope. The Areas under the curve (AUC) metric was used to assess the model’s performance. The results demonstrated that all models achieved similarly good performance with an AUC of 0.80, 0.76, 0.74, and 0.72 for the ensemble, RF, FR, and AHP models, respectively. Areas with high groundwater yield potential were primarily reported in the eastern part of Kanchanaburi, where the terrain is flat. The ensemble approach slightly improved the predictive power, but at the cost of model complexit

IMPACT OF PROCESSING AND FREEZING STORAGE CONDITIONS ON SOME PHYSICOCHEMICAL AND BIOLOGICAL PROPERTIES OF TRA FISH BALLS (Pangasius hypophthalmus).

The present study attempts to investigate the effects of time and temperature during blanching on the changes in physicochemical properties such as texture, brightness, and total bacterial count (TBC). The content of protein, fat, moisture, and pH of input materials (Tra fish) after the processing stages was also investigated. The product was preserved by freezing at -40 °C for 42 days and applied blanching/steaming conditions. The results showed that the blanching method is recommended for the product cooked stage at 90 °C for 4 min. After 42 days stored in frozen condition. TBC has been on an increasing trend and the structure has not changed significantly

Characterization of Acid-Soluble Collagen from Food Processing By-Products of Snakehead Fish (Channa striata)

The isolation of acid-soluble collagen (ASC) from by-products of snakehead fish (Channa striata), including skin and the mixture of skin and scale, has been investigated. The recovery yield of fish skin ASC (13.6%) was higher than ASC from fish skin and scale (12.09%). Both ASCs were identified as type I collagen and showed maximal solubility at pH 2. Collagen samples from the mixture of skin and scale had higher imino acid content (226 residues/1000 residues) and lower wavenumber in the amide I and amide III region (1642 and 1203 cm−1, respectively) than the fish skin ASC (the imino acid content was 220 residues/1000 residues and the wavenumber in the amide I and amide III were 1663 and 1206 cm−1, respectively. The difference scanning calorimeter (DSC) showed higher thermal stability in ASC from the mixture of skin and scale (Td of 35.78 °C) than fish skin ASC (34.21 °C). From the result, the denaturation temperature of ASC had a close relationship with the content of imino acid as well as with the degradation of α-helix in amide I and III. These results suggest that collagen could be obtained effectively from snakehead fish by-products and has potential as a realistic alternative to mammalian collagens