Journal of Food Process Engineering最新文献

This study investigated the effects of four postharvest treatments—control (CK), 1-methylcyclopropene (1-MCP), ozone (O₃), and a combination of 1-MCP with ozone (CT)—on the storage quality of ‘Manaohong’ cherries stored at 1°C ± 0.5°C and 90% ± 5% relative humidity. Among these, CT proved most effective in maintaining fruit quality. It substantially lowered the respiration rate, membrane permeability, and decay incidence during storage. Additionally, cherries in the CT retained greater fruit stalk tension, which contributed to better firmness, color attributes (L*, c*, h°), texture, and visual integrity. The CT treatment also enhanced the activity of antioxidant enzymes such as superoxide dismutase (SOD) and Catalase (CAT), while promoting the accumulation of key antioxidants, including total phenolics, flavonoids, anthocyanins, and vitamin C (V_C). These changes helped mitigate oxidative stress throughout the storage period. From an aroma perspective, CT reduced the production of short-aldehydes and sulfur-containing compounds—both commonly associated with quality decline. Principal component analysis showed that CT consistently performed well across a wide range of quality indicators, effectively delaying overall deterioration. This was further supported by electronic nose analysis, which revealed a lower accumulation of volatiles typically linked to spoilage in the CT. In conclusion, the combined use of 1-MCP and ozone substantially extended the shelf life of Cerasus pseudocerasus and helped maintain their quality, offering a reliable solution for postharvest preservation.

There is high demand for food proteins with enhanced functional qualities and bioactive characteristics developed through safe technologies. The hydrolysate of whey protein isolate (WPI) was subjected to simultaneous dual frequency energy-gathered ultrasound (SDFU) pretreatment, and its functionality, antioxidant activity and ACE-inhibitory activities evaluated. The results showed that ultrasound pretreatment significantly (p < 0.05) increased the protein functionalities (solubility, emulsion stability index and emulsion ability index) with the highest improvement being recorded at 20 min of sonication. Antioxidant activity of ultrasound pretreated whey hydrolysate was improved after 1 h of hydrolysis using trypsin. The optimal ACE-inhibitory activity of 92.34% was achieved at optimal conditions of 15% concentration, temperature of 46°C, enzyme substrate ratio of 2000 U/g and pH of 8.06 using response surface design. SDFU can be used as pretreatment technique to improve the functionality, antioxidant and ACE-inhibitory activities of WPI.

Conventional gelatin extraction from high-collagen tissues requires prolonged thermal processing (8–10 h), resulting in high energy consumption and potential degradation of functional properties. To address this limitation, this study investigated ohmic heating (OH) as an alternative extraction method for bovine hide gelatin. Gelatin was extracted using voltage gradients of 5–20 V/cm for 1–5 h and compared with both conventional extraction parameters and commercial halal gelatins. OH markedly reduced the extraction time to 1–5 h while maintaining a maximum temperature of 70°C, resulting in significantly improved extraction efficiency and higher dry matter and protein contents (p < 0.05). Although gel strength (122.12–176.81 g) was lower than that of commercial bovine gelatin (242.44 g), all OH-treated samples except those extracted at 20 V/cm formed stable gels. SDS-PAGE and compositional analyses indicated that OH induced partial degradation of high-molecular-weight fractions, consistent with the observed gel strength trends. The amino acid profiles, dominated by glycine, proline, and hydroxyproline, and the viscoelastic behavior (G′ > G″) were comparable to commercial references. Thermal analyses further revealed sharper melting transitions and higher ΔH values, suggesting improved thermal stability. Microstructural changes in pore size and distribution supported the observed functional differences. Overall, OH-assisted extraction provides an efficient, energy-saving, and thermally controlled approach to gelatin production. To our knowledge, this is the first study to demonstrate the applicability of ohmic heating for extracting gelatin from bovine hide, underscoring its potential as a sustainable alternative to conventional processing methods.

Apples are susceptible to damage during harvesting, packaging, and transportation. Early bruises are difficult to distinguish from normal tissue, making manual sorting difficult. To address this challenge, this study proposed an early bruise detection method for apples based on hyperspectral characteristic wavelength images, an adaptive threshold segmentation algorithm, and a deep learning model. NIR hyperspectral images of normal apples and apples with bruises (single/multiple bruises on fruit, stem, calyx surfaces) were captured. By combining the weight coefficients of the best principal component image with spectral features, three characteristic wavelengths were selected, and secondary PCA obtained the optimal principal component image. Using the designed adaptive threshold segmentation based on PCA image combined with Hough circle detection, effective detection of early bruises with varying severity, positions, and numbers was achieved. Comparing the Otsu threshold, fixed threshold, and the proposed adaptive threshold segmentation algorithm, the results showed that the proposed adaptive threshold segmentation algorithm significantly outperformed the Otsu and fixed threshold methods in terms of F1-score (96.18%). Compared to full-wavelength images, the detection of early-stage bruising on apples using images based on three characteristic wavelengths demonstrated a significant speed advantage, validating the superiority of the adaptive threshold segmentation algorithm. Additionally, to further validate the effectiveness of characteristic wavelength images and improve detection accuracy, apple bruising detection based on the deep learning-based YOLOv11 algorithm was also implemented, achieving an F1 score of 99.94% for bruise detection. This study provides technical support for the rapid and non-destructive detection of early apple bruises and has potential application value.

This is the first study to optimize the extraction of anthocyanins and phenolic compounds from black carrot pomace using ultrasound-assisted extraction (UAE) with acidified water as a green solvent. In contrast to conventional methods utilizing organic solvents, this environmentally friendly approach was designed to comply with halal standards and promote sustainability. The extraction process was optimized using response surface methodology (RSM) with Box–Behnken experimental design. A total of 15 experimental combinations were performed at three levels of temperature (30°C–60°C), duration (20–60 min), and dilution factor (DF; 10–30 mL/g), with total monomeric anthocyanin (TMA), total phenolic content (TPC), and antioxidant capacity (DPPH) as response variables. The optimal conditions determined were 47°C, 36 min, and a DF of 19 mL/g, yielding 591 mg/100 g TMA, 2563 mg GAE/100 g TPC, and 75.8% antioxidant activity. High-performance liquid chromatography (HPLC) analysis revealed that 56% of anthocyanins were acylated, indicating higher stability suitable for industrial use. Experimental results closely matched model predictions, confirming the model's validity. These findings highlight the potential of UAE combined with acidified water as a scalable, sustainable, and efficient extraction method for valorizing black carrot byproducts. The recovered anthocyanins may have potential applications as natural organoleptic enhancers in food products, while antioxidants and phenolic compounds could be utilized as natural preservatives and phenolic content enhancers. This approach contributes significantly to sustainable food production and waste management practices.

The growing global emphasis on sustainable, plant-based proteins is showcasing more obscure Indian pulses like horse gram, moth bean, rice bean, winged bean, adzuki bean, khesari, and lablab bean. These pulses have a protein content (15%–45%) and essential amino acids as well as bioactive compounds that promote public health. Many of the species thrive in areas with drought potential, making them both nutrient-dense and robust in an adverse setting. Ultrasound-Assisted Extraction (UAE) has emerged as a possible green technology for utilizing these pulses. The UAE utilizes acoustic cavitation for cell wall disruption and shows significant improvement in protein recovery at pH 8–9 and 30°C–50°C with an ultrasound treatment time of 20–30 min, while also decreasing solvent and energy requirements relative to traditional methods. Besides yield, UAE also improved protein solubility, digestibility, and functionality, thereby characterizing these proteins for use in functional foods, nutraceuticals, plant-based products, including dairy replacements, health drinks, and meat substitutes. This review highlights the dietary importance, agricultural advantages and ecological benefits of lesser-known Indian pulses along with operational modalities and improvement measures of the UAE. Given the challenges like unknown variability of raw materials, and not enough clinical evidence, the UAE's use of sustainable technologies along with India's rapidly growing functional food market (expected value USD 10 billion by 2025) make it a strategic tool for sustainable agriculture, strengthening economic opportunities and addressing global nutritional needs.

Fruit bars are snack products obtained by mushing fruit, adding sugar, pectin, and other ingredients, and drying the resulting mixture. The aim of this study was to investigate the effects of spent coffee grounds (SCGs), a valuable waste product of the coffee industry, on the physicochemical and bioactive properties of a snack fruit bar enriched with bioactive properties after mushing apricot fruit. Results showed that apricot bars containing 2.5%, 5%, and 7.5% SCGs had higher phenolic, flavonoid, antioxidant activity (ABTS and DPPH), ascorbic acid, and total carotenoid contents compared to the control group. Especially, the fruit bar containing 7.5% SCG stood out in terms of tested bioactive properties. Therefore, it has been determined that the antioxidant and phenolic compounds found in SCGs are also reflected in fruit bars. Furthermore, α-amylase and lipase inhibition values were increased in the enriched fruit bars, and the potential of the developed fruit bars to exhibit antidiabetic and antiobesity properties was improved. Furthermore, the intestinal phase phenolic compound bioaccessibility values of the enriched fruit bars (87.40%–133.3%) were higher than the SCG-free control fruit bar (91.7%). The potential for creating an alternative product with improved nutritional and economic benefits by adding a waste product rich in bioactive compounds such as SCGs to the fruit bar formulation was evaluated. Such products could be considered a new alternative to a functional snack product group rich in bioactive substances that could be incorporated into today's diet.

To address fruit and branch damage in mechanized sea buckthorn harvesting, this study investigates the dynamic response and damage mechanisms using the Finite Element Method (FEM) and vibration experiments. Vibration parameters were analyzed via Continuous Wavelet Transform (CWT). Key mechanical properties of branches were determined, and a fruit detachment acceleration model, along with damage indices, was established. Results indicated a fruit rupture strength of 1.577 MPa. The main contribution lies in integrating multiple approaches to elucidate vibration-induced damage mechanisms and quantify critical harvesting parameters. The use of optimized vibration parameters, with a frequency of 16.3 Hz and an acceleration of 2.5 g (g = 9.80 m/s²), was shown to improve the fruit harvest rate while minimizing damage. This study offers essential technical insights for designing efficient sea buckthorn vibration harvesters.