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Chemical and Physical Properties in Food Processing

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Food Science and Technology".

Deadline for manuscript submissions: 30 December 2024 | Viewed by 19826

Special Issue Editors


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Guest Editor
Department of Chemistry, University of Patras, 26504 Patras, Greece
Interests: physicochemical aspects of food processing; the development of new chromatographic techniques for determining physicochemical quantities; physicochemical studies of alcoholic fermentation
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Department of Food Science and Technology, University of the Peloponnese, 24100 Kalamata, Greece
Interests: physicochemical aspects in food biotechnology; food quality and safety; kinetic study of alcoholic fermentation; physical chemistry of interfaces
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Department of Food Science and Human Nutrition, Agricultural University of Athens, 11855 Athens, Greece
Interests: lactic acid bacteria; probiotics; functional foods; dairy products; meat products; bacterial genetics; genomics; metagenomics; bacteriocins
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Food production involves various processes that affect the physical, chemical, and microbiological properties of the food produced. The application of these various processes affects the food in terms of stability, texture, taste, colour, etc., but also acquires properties that make the new food suitable for different groups of the population with specific needs or health problems.

We are pleased to invite you to contribute to this Special Issue which will be dedicated to presenting methodologies applied in food production or food modification, and how these processes affect the physical, chemical, and microbiological properties of foods.

Original research articles, short communications, or review articles could be published in this Special Issue.

Dr. Athanasia Koliadima
Dr. John Kapolos
Dr. Konstantinos Papadimitriou
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • food processing
  • chemical properties of food
  • microbiological stability
  • chemical modification
  • physical properties
  • physical modification
  • texture
  • flavor
  • food perception

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Published Papers (9 papers)

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Research

18 pages, 3022 KiB  
Article
Formation and Texture Analysis of Extrusion-Based 3D Printed Foods Using Nixtamalized Corn and Chickpea Flours: Effect of Cooking Process
by Verónica Valeria Rodríguez-Herrera, Takumi Umeda, Hiroyuki Kozu and Isao Kobayashi
Appl. Sci. 2024, 14(16), 7315; https://doi.org/10.3390/app14167315 - 20 Aug 2024
Viewed by 907
Abstract
Extrusion-based three-dimensional (3D) food printing (3DFP) enhances the customization of 3D-printed foods by using multiple food pastes. Post-printing processes like baking are usually necessary and significantly impact the stability of the 3D-printed foods. This study aimed to produce multi-material 3D-printed foods using nixtamalized [...] Read more.
Extrusion-based three-dimensional (3D) food printing (3DFP) enhances the customization of 3D-printed foods by using multiple food pastes. Post-printing processes like baking are usually necessary and significantly impact the stability of the 3D-printed foods. This study aimed to produce multi-material 3D-printed foods using nixtamalized corn dough and chickpea paste (CP) in extrusion-based 3DFP and to study the effect of post-printing processes (water oven cooking and steam cooking) and the type of material used (single- or multi-material) on the final appearance, weight, size, and texture of the 3D-printed foods. Multi-material 3D-printed foods were successfully produced using extrusion-based 3DFP. Steam-cooked 3D-printed foods cooked uniformly and had a better appearance, as they did not develop surface cracks compared to water oven-cooked foods. Water-oven cooked foods experienced a greater weight loss of 35.6%, and higher height and length reduction of 1.5% and 8.4%, respectively. Steam-cooked multi-material 3D-printed foods were harder at 40% of strain, with force values of 66.9 and 46.3 N for water-oven cooked foods. Post-printing processes, as well as the presence of CP in the middle of the 3D-printed foods, influenced their final appearance, weight, size, and texture. This study offers interesting findings for the innovative design of chickpea- and corn-based multi-material 3D-printed foods. Full article
(This article belongs to the Special Issue Chemical and Physical Properties in Food Processing)
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18 pages, 7516 KiB  
Article
Parameter Calibration of Discrete Element Model of Wine Lees Particles
by Xiaoyuan Zhang, Rui Wang, Baoan Wang, Jie Chen and Xiaoguo Wang
Appl. Sci. 2024, 14(12), 5281; https://doi.org/10.3390/app14125281 - 18 Jun 2024
Cited by 1 | Viewed by 641
Abstract
In order to investigate the contact characteristics of the mechanical parts of the brewing robot with wine lees particles, it is essential to calibrate the parameters of the discrete elemental model of wine lees particles. This paper proposes a method based on tests [...] Read more.
In order to investigate the contact characteristics of the mechanical parts of the brewing robot with wine lees particles, it is essential to calibrate the parameters of the discrete elemental model of wine lees particles. This paper proposes a method based on tests of the angle of repose. The simulation test is conducted to establish a regression model and combined with physical tests to find optimization. The contact model used in simulation modeling is Hertz-Mindlin with Johnson-Kendall-Roberts. Not all discrete element model parameters of wine lees particles have a significant impact on the angle of repose, so screening through Plackett-Burman Design is performed. The results indicate that the restitution coefficient between wine lees particles and restitution coefficient between wine lees particle and steel plate have a significant impact on angle of repose. Additionally, another parameter that is difficult to obtain, namely surface energy (JKR), also plays a crucial role. The optimal value interval for these three parameters is determined by the steepest ascent test, and a linear regression model for angle of repose is built through Box-Behnken Design. The optimal values obtained are as follows: restitution coefficient between wine lees particles—0.603; restitution coefficient between wine lees particle and steel plate—0.595; JKR—0.083. Finally, in order to verify the accuracy of calibrated parameters, simulation verification tests are carried out which show that there is only a relative error rate at 0.18% between simulated angle of repose and actual angle of repose, indicating that accurate calibration parameters were achieved. This study can provide reference for selecting discrete element model parameters for wine lees particles in future research endeavors. Full article
(This article belongs to the Special Issue Chemical and Physical Properties in Food Processing)
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13 pages, 1628 KiB  
Article
Kinetic Study of Fig Syrup Fermentation by Genetically Modified Saccharomyces cerevisiae Yeast Strains: A Physicochemical Approach to the Yeast Strain Life Cycle
by Konstantina Kassoumi, Dimitrios Sevastos and Athanasia Koliadima
Appl. Sci. 2024, 14(5), 2117; https://doi.org/10.3390/app14052117 - 4 Mar 2024
Viewed by 1189
Abstract
Reversed-flow gas chromatography (R.F.G.C.) was employed to assess the impact of genetic modification on Saccharomyces cerevisiae yeast strains during the process of alcoholic fermentation, utilizing fig syrup. Multiple fermentations were carried out at various temperatures to evaluate the influence of genetic modifications on [...] Read more.
Reversed-flow gas chromatography (R.F.G.C.) was employed to assess the impact of genetic modification on Saccharomyces cerevisiae yeast strains during the process of alcoholic fermentation, utilizing fig syrup. Multiple fermentations were carried out at various temperatures to evaluate the influence of genetic modifications on yeast strain efficiency. The study involved a wild-type yeast strain, W303, as a control and two genetically modified strains, W_M4_533 and W_M4_558, sharing the same genetic background as the wild type. Notably, the genetic modifications in the Msn4p transcription factor involved the substitution of serine residues with alanine at positions 533 and 558, resulting in the development of psychrophilic or ethanol-resistant strains. Utilizing the R.F.G.C. method enabled the differentiation of the duration of alcoholic fermentation phases, providing insights correlated to the yeast cell life cycle. The values of rate constants (k) for each phase, conducted with both wild-type and genetically modified cells using RFGC, aligned with the existing literature. Additionally, the calculation of activation energies for distinct phases revealed lower values for genetically modified strains compared to wild-type strains. This decrease in activation energies suggests enhanced efficiency in the alcoholic fermentation process for the genetically modified strains. Full article
(This article belongs to the Special Issue Chemical and Physical Properties in Food Processing)
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13 pages, 1365 KiB  
Article
The Influence of the Used Bleaching Earth on the Content of Natural Dyes in Hemp (Cannabis sativa L.) Oils
by Damian Marcinkowski, Edyta Nizio, Wojciech Golimowski and Kamil Czwartkowski
Appl. Sci. 2024, 14(1), 390; https://doi.org/10.3390/app14010390 - 31 Dec 2023
Cited by 1 | Viewed by 1507
Abstract
Cold-pressed hemp oils are characterized by an intense color, which is undesirable when used directly. Therefore, research was undertaken on removing chlorophyll and carotenoids effectively. This publication presents the results of tests that verified the adsorption properties of seven bleaching earths (BE1–BE7) in [...] Read more.
Cold-pressed hemp oils are characterized by an intense color, which is undesirable when used directly. Therefore, research was undertaken on removing chlorophyll and carotenoids effectively. This publication presents the results of tests that verified the adsorption properties of seven bleaching earths (BE1–BE7) in two doses (2.5% and 5.0%) in the low-temperature bleaching process of hemp oils. These oils were obtained by cold and hot pressing of the seeds of three varieties of hemp (Cannabis sativa L.): Finola, Earlina 8FC, and Secuieni Jubileu. The color change and the content of carotenoid and chlorophyll pigments in the bleached oils were verified using the colorimetric method (CIE-Lab). The BEs used had different abilities to reduce the content of natural dyes connected with oil decolorization. The conducted research allowed us to characterize the influence of BEs on the organoleptic properties of the tested oils. Hemp oil obtained from the Secuieni Jubileu CP and HP hemp variety should be bleached with unmodified magnesian bentonite at 2.5%. Unmodified attapulgite clay is not recommended for this variety, as it strongly adsorbs carotenoids from the oil. Full article
(This article belongs to the Special Issue Chemical and Physical Properties in Food Processing)
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9 pages, 263 KiB  
Article
Effect of Drying Temperature of Ambar Pumpkin on Proximate Composition and Content of Bioactive Ingredients
by Agata Koziorzębska, Andrzej Łozicki, Anna Rygało-Galewska and Klara Zglińska
Appl. Sci. 2023, 13(14), 8302; https://doi.org/10.3390/app13148302 - 18 Jul 2023
Viewed by 1140
Abstract
Pumpkins are often used as a fodder component and food due to their high nutritional value and share of bioactive components (e.g., carotenoids, polyunsaturated fatty acid (PUFAs)). Due to their high moisture content, they must be preserved; drying is still the most popular [...] Read more.
Pumpkins are often used as a fodder component and food due to their high nutritional value and share of bioactive components (e.g., carotenoids, polyunsaturated fatty acid (PUFAs)). Due to their high moisture content, they must be preserved; drying is still the most popular method. Our work aimed to assess the optimal drying temperature to keep the best possible nutritional value of the raw material. For this purpose, pumpkin was dried at 40 °C, 60 °C and 80 °C. Then, the proximate composition, carotenoid content, fatty acids, and antioxidant properties were determined. The results indicate that the carotenoids were relatively stable up to 60 °C and then decreased sharply. Furthermore, antioxidant activity was the highest at 40 °C and 60 °C. However, in the case of PUFA content, drying at 80 °C was the most effective, probably due to the shorter exposure time to the stimulus. Full article
(This article belongs to the Special Issue Chemical and Physical Properties in Food Processing)
12 pages, 431 KiB  
Article
Evaluation of Wheat Noodles Supplemented with Soy Protein Isolate for Nutritional, Textural, Cooking Attributes and Glycemic Index
by Jia-Ning Liang, Parushi Nargotra, Xiang-Yu Li, Vishal Sharma, Shu-Ling Hsieh, Yung-Hsiang Tsai, Yung-Chuan Liu, Chun-Yung Huang and Chia-Hung Kuo
Appl. Sci. 2023, 13(13), 7772; https://doi.org/10.3390/app13137772 - 30 Jun 2023
Cited by 4 | Viewed by 2192
Abstract
The elderly population in developed countries has increased rapidly in recent years; the elderly may be at greater risk of protein deficiency due to dietary, socio-economic, dental, and physical restrictions. Therefore, to address the issue of protein deficiency in elderly people, the present [...] Read more.
The elderly population in developed countries has increased rapidly in recent years; the elderly may be at greater risk of protein deficiency due to dietary, socio-economic, dental, and physical restrictions. Therefore, to address the issue of protein deficiency in elderly people, the present study aimed to enhance the protein content of high-gluten flour noodles, an Asian staple food, by supplementing them with soybean protein isolate (SPI) powder. The effect of SPI addition (5–20%, w/w) on composition, quality, texture, physical and sensory properties, and glycemic index (GI) of high-gluten flour noodles was investigated. The noodles made only from high-gluten flour served as control. In comparison to control noodles, 20% SPI noodles showed a rise in protein and moisture content from 16.17% to 30.64% and 36.06 to 44.84%, respectively. The cooking yield and cooking loss increased with an increase in SPI concentration compared to control noodles. Color characteristics analysis revealed the decreasing trend in brightness and yellowness of SPI noodles with minimal L* and b* values at a 20% SPI concentration. The addition of SPI also resulted in a decrease in the hardness and tensile strength of the noodles. The sensory analysis showed that 5% SPI noodles were more similar to control noodles in terms of flavor, taste, and overall acceptability. Moreover, the addition of SPI to the noodles significantly decreased the GI of the noodles reaching the standard of low-GI food. The findings of the current study indicate that soy protein noodles, besides supplementing the desired nutrients, may also prevent the risk of diabetes in elderly people. Full article
(This article belongs to the Special Issue Chemical and Physical Properties in Food Processing)
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13 pages, 704 KiB  
Article
Physicochemical and Microbiological Changes Associated with Processing in Dry-Cured Tuna
by Mónica Sánchez-Parra, José L. Ordóñez-Díaz, Jesús Pérez-Aparicio and José M. Moreno-Rojas
Appl. Sci. 2023, 13(10), 5900; https://doi.org/10.3390/app13105900 - 10 May 2023
Cited by 4 | Viewed by 1975
Abstract
Dry-cured tuna is a traditional product manufactured in the Mediterranean region of Spain, known as mojama. The traditional salting-drying elaboration process attributes new organoleptic characteristics to the final product, changing its flavor, color, and nutritional value. This study aimed to evaluate the [...] Read more.
Dry-cured tuna is a traditional product manufactured in the Mediterranean region of Spain, known as mojama. The traditional salting-drying elaboration process attributes new organoleptic characteristics to the final product, changing its flavor, color, and nutritional value. This study aimed to evaluate the changes in physicochemical, biochemical, and microbiological parameters taking place during the process. The physicochemical parameters were affected by the processing steps (salting, salt-washing, and drying), except for total acidity and pH. The water activity value and relative moisture percentage decreased to 0.86 and 33.03%, respectively. Moreover, the addition of salt and the drying step increased the water-holding capacity. The lipid oxidation values increased from raw tuna loins to the final product (1.37 vs. 5.56 mg malondialdehyde/kg). Moreover, the total volatile basic nitrogen values increased in the final product, fundamentally due to the concentration effect caused by the water loss, although may also be due to the degradation of proteins during processing. The microbiological analysis showed that the values obtained in the dry-cured tuna were below the limits established by the reference regulation for dry-cured fish products. Full article
(This article belongs to the Special Issue Chemical and Physical Properties in Food Processing)
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21 pages, 2625 KiB  
Article
Traditional Cultivars Influence on Physical and Engineering Properties of Rice from the Cauvery Deltaic Region of Tamil Nadu
by Subramanian Venkatesan, Dhandayuthapani Udhaya Nandhini, Kandasamy Senthilraja, Balasubramaniam Prabha, Sivaprakasam Jidhu Vaishnavi, Tamilmani Eevera, Eagan Somasundaram, Natarajan Balakrishnan, Muthurajan Raveendran, Vellingiri Geethalakshmi and Servakaranpalayam Subramaniam Sivakumar
Appl. Sci. 2023, 13(9), 5705; https://doi.org/10.3390/app13095705 - 5 May 2023
Cited by 1 | Viewed by 4945
Abstract
Standard unit operations/equipment have not evolved for the traditional rice varieties of the Cauvery Deltaic region of Tamil Nadu. The fame of traditional rice is increasing nowadays owing to its health benefits. Non-standard unit operations may cause rice grains to crack during milling, [...] Read more.
Standard unit operations/equipment have not evolved for the traditional rice varieties of the Cauvery Deltaic region of Tamil Nadu. The fame of traditional rice is increasing nowadays owing to its health benefits. Non-standard unit operations may cause rice grains to crack during milling, accumulating more broken rice and yields in products of inferior quality. As a result, research into the physical properties of rice is crucial for the development of rice processing equipment that minimizes post-harvest losses during milling. Hence, an assessment was made to evaluate 30 traditional rice cultivars on their Physical (grain length, width, thickness, shape, and size), gravimetric (bulk, true, tapped density, porosity, Carr’s index, and Hausner ratio), and engineering characteristics (equivalent, arithmetic, square mean, and geometric mean diameter) using standard protocols, with the goal of reviving and preserving older varieties. The results from the analysis showed significant variations (p < 0.05) between all properties that were evaluated. According to length, a substantial amount of traditional rice varieties were long grain (76.7%), whereas (16.7%) belonged to the medium type and (3.3%) were short-grain types, respectively. There were variations among the three different categories of local rice grains when it comes to size, ranging from 3.26 to 4.69 mm for arithmetic mean diameter, 2.84 to 4.00 mm for geometric mean diameter, and 3.02 to 4.28 mm for square mean diameter, respectively. Sphericity, aspect ratio, and surface area measurements of the samples varied from 37.7% to 81.2%, 0.26 to 1.00, and 25.4 to 50.1 mm2, respectively. Of the 30 varieties, 28 were under the high amylose category, and 2 belonged to the intermediate type. The Pearson correlation was established to study the interrelationships between the dimensions and engineering properties. Principal component analysis (PCA) reduced the dimensionality of 540 data into five principal components (PC), which explained 95.7% of the total variance. These findings suggest that it is possible to revive old landraces through careful selection and analysis of these properties. The superior characteristics of these traditional varieties can be further evaluated for breeding programs in order to improve the cultivation of these cherished rice landraces to enhance nutritional security. Full article
(This article belongs to the Special Issue Chemical and Physical Properties in Food Processing)
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15 pages, 1708 KiB  
Article
Shelf-Life Assessment of Bread Partially Substituted with Soy Protein Isolate
by Yu-Han Chang, Cheng-Ming Chang and Pei-Ting Chuang
Appl. Sci. 2023, 13(6), 3960; https://doi.org/10.3390/app13063960 - 20 Mar 2023
Cited by 3 | Viewed by 3953
Abstract
Partial substitution of flour with soy protein isolate in bread making increases the protein content and nutritional value of baked goods as it contains more lysine than wheat flour. However, changes in the bread recipe alter the pH and amino acid content of [...] Read more.
Partial substitution of flour with soy protein isolate in bread making increases the protein content and nutritional value of baked goods as it contains more lysine than wheat flour. However, changes in the bread recipe alter the pH and amino acid content of the baked good, and product assessment is required to determine whether the product is a non-time/temperature control for safety food. This study examines the effects of substituting high-gluten flour with 2–8% soy protein isolate on bread quality and on the shelf life of the bread using the microbiological challenge test. The results indicate that increased soy protein isolate substitution reduces the volume and specific volume of bread. Six percent soy protein isolate-fortified bread also had a poorer taste, and, therefore, the optimal substitution amount is 4%. Based on the yeast and mold growth during the storage period, the 4% soy protein isolate-fortified bread has a shelf life of four days, while the 2% soy protein isolate-fortified bread has a shelf life of five days. The microbiological challenge test results revealed that the substitution of flour with soy protein isolate is conducive to Staphylococcus aureus growth within the bread. To summarize, the optimal soy protein isolate substitution in bread is 4%, which offers a four-day shelf life at room temperature. Full article
(This article belongs to the Special Issue Chemical and Physical Properties in Food Processing)
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