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Pandiselvam R, Mitharwal S, Rani P, Shanker MA, Kumar A, Aslam R, Barut YT, Kothakota A, Rustagi S, Bhati D, Siddiqui SA, Siddiqui MW, Ramniwas S, Aliyeva A, Mousavi Khaneghah A. The influence of non-thermal technologies on color pigments of food materials: An updated review. Curr Res Food Sci 2023; 6:100529. [PMID: 37377494 PMCID: PMC10290997 DOI: 10.1016/j.crfs.2023.100529] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 05/23/2023] [Accepted: 06/01/2023] [Indexed: 06/29/2023] Open
Abstract
The color of any food is influenced by several factors, such as food attributes (presence of pigments, maturity, and variety), processing methods, packaging, and storage conditions. Thus, measuring the color profile of food can be used to control the quality of food and examine the changes in chemical composition. With the advent of non-thermal processing techniques and their growing significance in the industry, there is a demand to understand the effects of these technologies on various quality attributes, including color. This paper reviews the effects of novel, non-thermal processing technologies on the color attributes of processed food and the implications on consumer acceptability. The recent developments in this context and a discussion on color systems and various color measurement techniques are also included. The novel non-thermal techniques, including high-pressure processing, pulsed electric field, ultrasonication, and irradiation which employ low processing temperatures for a short period, have been found effective. Since food products are processed at ambient temperature by subjecting them to non-thermal treatment for a very short time, there is no possibility of damage to heat-sensitive nutrient components in the food, any deterioration in the texture of the food, and any toxic compounds in the food due to heat. These techniques not only yield higher nutritional quality but are also observed to maintain better color attributes. However, suppose foods are exposed to prolonged exposure or processed at a higher intensity. In that case, these non-thermal technologies can cause undesirable changes in food, such as oxidation of lipids and loss of color and flavor. Developing equipment for batch food processing using non-thermal technology, understanding the appropriate mechanisms, developing processing standards using non-thermal processes, and clarifying consumer myths and misconceptions about these technologies will help promote non-thermal technologies in the food industry.
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Affiliation(s)
- R. Pandiselvam
- Physiology, Biochemistry, and Post-Harvest Technology Division, ICAR-Central Plantation Crops Research Institute, Kasaragod, 671 124, Kerala, India
| | - Swati Mitharwal
- Department of Food Science and Technology, National Institute of Food Technology Entrepreneurship and Management (NIFTEM), Kundli, India
| | - Poonam Rani
- Food Chemistry & Technology Department, Teagasc Food Research Centre, Moorepark, Fermoy, Cork, Ireland
| | - M. Anjaly Shanker
- Department of Agriculture and Environmental Sciences, National Institute of Food Technology Entrepreneurship and Management (NIFTEM), Sonepat, Haryana, India
| | - Amit Kumar
- Food Chemistry & Technology Department, Teagasc Food Research Centre, Moorepark, Fermoy, Cork, Ireland
| | - Raouf Aslam
- Department of Processing and Food Engineering, Punjab Agricultural University, Ludhiana, Punjab, 141 004, India
| | - Yeliz Tekgül Barut
- Food Processing Department, Köşk Vocational School, Aydın Adnan Menderes University, Aydın, 09100, Turkey
| | - Anjineyulu Kothakota
- Agro-Processing & Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Trivandrum, 695 019, Kerala, India
| | - Sarvesh Rustagi
- School of Applied and Life Sciences, Uttaranchal University, Dehradun, Uttarakhand, India
| | - Dolly Bhati
- Department of Food Bioscienes, Teagasc, Agriculture and Food Development Authority, D15 DY05, Dublin, Ireland
| | - Shahida Anusha Siddiqui
- Technical University of Munich Campus Straubing for Biotechnology and Sustainability, Essigberg 3, 94315, Straubing, Germany
- German Institute of Food Technologies (DIL e.V.), Prof.-von-Klitzing Str. 7, 49610 D-Quakenbrück, Germany
| | - Mohammed Wasim Siddiqui
- Department Food Science and Postharvest Technology, Bihar Agricultural University, Sabour, 813210, Bhagalpur, India
| | - Seema Ramniwas
- University Centre for Research and Development, University of Biotechnology, Chandigarh University, Gharuan, Mohali, Punjab, India
| | - Aynura Aliyeva
- Department of Technology of Chemistry, Azerbaijan State Oil and Industry University, Baku, Azerbaijan
| | - Amin Mousavi Khaneghah
- Department of Technology of Chemistry, Azerbaijan State Oil and Industry University, Baku, Azerbaijan
- Department of Fruit and Vegetable Product Technology, Prof. WacławDąbrowski Institute of Agricultural and Food Biotechnology – State Research Institute, 36 Rakowiecka St., 02-532, Warsaw, Poland
- Faculty of Agro-Industry, Chiang Mai University, Chiang Mai, 50100 Thailand
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Muthusamy K, Han HS, Soundharrajan I, Jung JS, Valan Arasu M, Choi KC. A Novel Strain of Probiotic Leuconostoc citreum Inhibits Infection-Causing Bacterial Pathogens. Microorganisms 2023; 11:microorganisms11020469. [PMID: 36838434 PMCID: PMC9958635 DOI: 10.3390/microorganisms11020469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 02/08/2023] [Accepted: 02/11/2023] [Indexed: 02/15/2023] Open
Abstract
Infectious diseases caused by bacteria are at risk of spreading and prolonging due to antimicrobial resistance. It is, therefore, urgently necessary to develop a more effective antibiotic alternative strategy to control pathogen spread. In general, probiotics have been recommended as a substitute for antibiotics that inhibit pathogens. This study was isolated and probiotic characteristics and antibacterial bacterial efficiency against various infection-causing pathogens were determined by different in vitro methods. A 16S rRNA sequence confirmed that the isolated strains belonged to a species of Leuconostoc citreum. L. citreum KCC-57 and KCC-58 produced various extracellular enzymes and fermented different carbohydrates. There was significant tolerance for both strains under the harsh conditions of the gastrointestinal tract (GIT). In addition, L. citreum KCC-57 and L. citreum KCC-58 showed significant auto-aggregations and hydrophobicity properties that varied with incubation time. Moreover, the cell-free secondary supernatant (CFS) of L. citreum KCC-57 and L. citreum KCC-58 inhibited growth of Enterococcus faecalis, Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus. According to a co-culture study, L. citreum KCC-57 and L. citreum KCC-58 were highly competitive for pathogen growth. L. citreum KCC-57 and L. citreum KCC-58 showed significant probiotic potential and strong antibacterial activities against different pathogens, suggesting that these strains could be used instead of antibiotics to control infectious pathogens.
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Affiliation(s)
- Karnan Muthusamy
- Grassland and Forages Division, National Institute of Animal Science, Rural Development Administration, Cheonan 31000, Republic of Korea
| | - Hyo-Shim Han
- Department of Biotechnology, Sunchon University, Suncheon 540742, Republic of Korea
| | - Ilavenil Soundharrajan
- Grassland and Forages Division, National Institute of Animal Science, Rural Development Administration, Cheonan 31000, Republic of Korea
| | - Jeong-Sung Jung
- Grassland and Forages Division, National Institute of Animal Science, Rural Development Administration, Cheonan 31000, Republic of Korea
| | - Mariadhas Valan Arasu
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Ki-Choon Choi
- Grassland and Forages Division, National Institute of Animal Science, Rural Development Administration, Cheonan 31000, Republic of Korea
- Correspondence: ; Tel.: +82-41-580-6752; Fax: +82-41-580-6779
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Bogusz R, Smetana S, Wiktor A, Parniakov O, Pobiega K, Rybak K, Nowacka M. The selected quality aspects of infrared-dried black soldier fly (Hermetia illucens) and yellow mealworm (Tenebrio molitor) larvae pre-treated by pulsed electric field. INNOV FOOD SCI EMERG 2022. [DOI: 10.1016/j.ifset.2022.103085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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4
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The Impact of the Fermentation Method on the Pigment Content in Pickled Beetroot and Red Bell Pepper Juices and Freeze-Dried Powders. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12125766] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The beetroot and red bell pepper are vegetables rich in active ingredients, and their potential for health benefits are crucial. Both presented raw materials are rich in natural pigments, but are unstable and seasonal; thus, it was decided to take steps to extend their durability. Lactic fermentation has been recognized as a food preservation method, requiring minimal resources. The activities undertaken were also aimed at creating a new product with a coloring and probiotic potential. For this reason, the study aimed to evaluate the impact of the method of fermentation on the content of active compounds (pigments) in pickled juices and freeze-dried powders. The lactic acid fermentation guided in two ways. The second step of the research was to obtain powders in the freeze-drying process. For fermentation, Levilactobacillus brevis and Limosilactobacillus fermentum were used. In juices and powders, pigments, color, and dry matter were tested. In this research, no differences in fermented juice pigment contents were seen; however, the color coefficient differed in raw juices. The freeze-drying process resulted in lowering the pigment content, and increasing dry matter and good storage conditions (glass transition temperatures 48–66 °C). The selection of vegetable methods suggested the use of fermentation and mixing it with a marinade (higher pigments and lactic acid bacteria content). All powders were stable and can be used as a colorant source, whereas for probiotic properties, a higher number of bacteria is needed.
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5
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Nguyen M, Van Chuyen H, Tran MD, Nguyen Q. Microencapsulation of
Syzygium zeylanicum
(L.)
DC
. extract using spray drying: Effects of wall materials on physicochemical characteristics and biological activities of the microcapsules. J FOOD PROCESS PRES 2022. [DOI: 10.1111/jfpp.16647] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Minh‐Trung Nguyen
- Institute of Biotechnology and Environment Tay Nguyen University, 567 Le Duan, Buon Ma Thuot City, Daklak Province Vietnam
- Faculty of Natural science and Technology Tay Nguyen University 567 Le Duan, Buon Ma Thuot City, Daklak Province Vietnam
| | - Hoang Van Chuyen
- Faculty of Chemical and Food Technology Ho Chi Minh City University of Technology and Education 01 Vo Van Ngan, Thu Duc City Ho Chi Minh City Vietnam
| | - Minh Dinh Tran
- Institute of Biotechnology and Environment Tay Nguyen University, 567 Le Duan, Buon Ma Thuot City, Daklak Province Vietnam
| | - Quang‐Vinh Nguyen
- Institute of Biotechnology and Environment Tay Nguyen University, 567 Le Duan, Buon Ma Thuot City, Daklak Province Vietnam
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Li Z, Xie S, Sun B, Zhang Y, Liu K, Liu L. Effect of
KCl
replacement of
NaCl
on fermentation kinetics, organic acids and sensory quality of sauerkraut from Northeast China. J FOOD PROCESS PRES 2022. [DOI: 10.1111/jfpp.16622] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhi Li
- College of Food Science Northeast Agricultural University Harbin China
| | - Shuangyu Xie
- College of Food Science Northeast Agricultural University Harbin China
| | - Bo Sun
- College of Food Science Northeast Agricultural University Harbin China
| | - Yu Zhang
- College of Food Science Northeast Agricultural University Harbin China
| | - Kai Liu
- College of Food Science Northeast Agricultural University Harbin China
| | - Li Liu
- Heilongjiang Institute for Drug Control affiliated to Heilongjiang Medical Products Administration Heilongjiang Province People’s Government Harbin China
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Rajam R, Subramanian P. Encapsulation of probiotics: past, present and future. BENI-SUEF UNIVERSITY JOURNAL OF BASIC AND APPLIED SCIENCES 2022. [DOI: 10.1186/s43088-022-00228-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Abstract
Background
Probiotics are live microbial supplements known for its health benefits. Consumption of probiotics reported to improve several health benefits including intestinal flora composition, resistance against pathogens. In the recent years, there is an increasing trend of probiotic-based food products in the market.
Main body
Probiotics cells are targeted to reach the large intestine, and the probiotics must survive through the acidic conditions of the gastric environment. It is recommended to formulate the probiotic bacteria in the range of 108–109 cfu/g for consumption and maintain the therapeutic efficacy of 106–107 cfu/g in the large intestine. During the gastrointestinal transit, the probiotics will drastically lose its viability in the gastric environment (pH 2). Maintaining cell viability until it reaches the large intestine remains challenging task. Encapsulating the probiotics cells with suitable wall material helps to sustain the survival of probiotics during industrial processing and in gastrointestinal transit. In the encapsulation process, cells are completely enclosed in the wall material, through different techniques including spray drying, freeze drying, extrusion, spray freeze drying, emulsification, etc. However, spray-drying and freeze-drying techniques are successfully used for the commercial formulation; thus, we limited to review those encapsulation techniques.
Short conclusions
The survival rate of spray-dried probiotics during simulated digestion mainly depends on the inlet air temperature, wall material and exposure in the GI condition. And fermentation, pH and freeze-drying time are the important process parameters for maintaining the viability of bacterial cells in the gastric condition. Improving the viability of probiotic cells during industrial processing and extending the cell viability during storage and digestion will be the main concern for successful commercialization.
Graphical abstract
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8
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Influence of Fermentation Beetroot Juice Process on the Physico-Chemical Properties of Spray Dried Powder. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27031008. [PMID: 35164290 PMCID: PMC8840475 DOI: 10.3390/molecules27031008] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 01/30/2022] [Accepted: 01/31/2022] [Indexed: 01/25/2023]
Abstract
Picking vegetables is, along with salting and drying, one of the oldest ways to preserve food in the world. This is the process of decomposition of simple sugars into lactic acid with the participation of lactic bacteria. The aim of the study was to obtain powders from fermented red beet juice with the highest possible amount of lactic acid bacteria (LAB) and active ingredients. For the analysis, juices were squeezed from the vegetables and two types of fermentation were used: a spontaneous fermentation and a dedicated one. After inoculation, samples were taken for analysis on a daily basis. Extract, pH, total acidity, pigments, and color were measured. In addition, microbiological tests were also carried out. The juices from the fifth day of fermentation was also spray dried, to obtain fermented beetroot powder. Juices from 3–5th day were characterized by a high content of LAB and betanin, had also a low pH, which proves that the lactic fermentation is working properly. The exception was the juice from spontaneous fermentation. According to the observations, the fermentation process did not run properly, and further analysis is needed. The powders were stable; however, results obtained from the pigment content and the LAB content are not satisfactory and require further analysis.
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Isolation of Lactococcus lactis from Whole Crop Rice and Determining Its Probiotic and Antimicrobial Properties towards Gastrointestinal Associated Bacteria. Microorganisms 2021; 9:microorganisms9122513. [PMID: 34946115 PMCID: PMC8703902 DOI: 10.3390/microorganisms9122513] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 12/01/2021] [Accepted: 12/01/2021] [Indexed: 11/21/2022] Open
Abstract
Antimicrobial resistance is an emerging condition that increases the risk of spreading and prolonging infectious diseases globally. Therefore, a new alternative strategy for antibiotics is required urgently to control pathogens spreading. Probiotics are considered as an alternative for antibiotics that inhibit pathogens. In the present study, potent lactic acid bacteria (LAB) were isolated and screened for their probiotic characteristics and antagonistic activity against intestinal pathogens by agar well diffusion, Time and Dose-dependent killing assay, minimum inhibitor, and minimum bactericidal concentration (MIC/MBC), and co-culture methods. The Lactococcus lactis RWP-3 and RWP-7 fermented the different carbohydrate substrates and produced different extracellular enzymes. Both isolates showed significant tolerant capability in the gastric, duodenal, and intestinal juices. In addition, RWP-3 and RWP-7 had hydrophobicity and aggregation properties in a time-dependent manner. Furthermore, the cell-free secondary metabolites (CFS) of RWP-3 and RWP-7 showed strong antibacterial activity against Escherichia coli,Staphylococcus aureus, Pseudomonas aeruginosa and Enterococcus faecalis. A co-culture study revealed that the RWP-3 and RWP-7 strongly compete with pathogen growths. RWP-3 and RWP-7 showed strong antagonistic activities against tested pathogens with significant probiotic characteristics, suggesting that these strains obtained could be used as an alternative strategy for the antibiotic to control infectious pathogens.
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Łopusiewicz Ł, Bogusławska-Wąs E, Drozłowska E, Trocer P, Dłubała A, Mazurkiewicz-Zapałowicz K, Bartkowiak A. The Application of Spray-Dried and Reconstituted Flaxseed Oil Cake Extract as Encapsulating Material and Carrier for Probiotic Lacticaseibacillus rhamnosus GG. MATERIALS (BASEL, SWITZERLAND) 2021; 14:5324. [PMID: 34576543 PMCID: PMC8471581 DOI: 10.3390/ma14185324] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 09/10/2021] [Accepted: 09/10/2021] [Indexed: 12/28/2022]
Abstract
Agro-industrial by-products are promising source of biopolymers, including proteins and polysaccharides. This study was designed to evaluate the flaxseed oil cake extract (FOCE) as natural encapsulating material and carrier for probiotic Lacticaseibacillus rhamnous GG (LGG). The powders were obtained using three spray drying inlet temperatures (110 °C, 140 °C, 170 °C), and reconstituted. The influence of temperature on water activity, morphology, chemical composition, flowability and cohesiveness of the powders was estimated. For all variants, the survival of bacteria during spray drying, and simulated passage through the gastrointestinal tract was evaluated. The preservation of LGG probiotic features such as cholesterol reduction, hydrophobicity and adhesion to mucin were examined. Results revealed that all physicochemical and functional characteristics of the powders were affected by the inlet temperature. This study demonstrated that FOCE is an appropriate matrix for spray drying (due to flaxseed proteins and polysaccharides) providing high survivability of bacteria (89.41-96.32%), that passed meaningfully through the simulated gastrointestinal tract (4.39-5.97 log reduction), largely maintaining their probiotic properties, being a promising environmentally-friendly carrier for probiotic LGG.
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Affiliation(s)
- Łukasz Łopusiewicz
- Center of Bioimmobilisation and Innovative Packaging Materials, Faculty of Food Sciences and Fisheries, West Pomeranian University of Technology Szczecin, Janickiego 35, 71-270 Szczecin, Poland; (E.D.); (P.T.); (A.B.)
| | - Elżbieta Bogusławska-Wąs
- Department of Applied Microbiology and Human Nutrition Physiology, West Pomeranian University of Technology Szczecin, Papieża Pawła VI 3, 71-899 Szczecin, Poland; (E.B.-W.); (A.D.)
| | - Emilia Drozłowska
- Center of Bioimmobilisation and Innovative Packaging Materials, Faculty of Food Sciences and Fisheries, West Pomeranian University of Technology Szczecin, Janickiego 35, 71-270 Szczecin, Poland; (E.D.); (P.T.); (A.B.)
| | - Paulina Trocer
- Center of Bioimmobilisation and Innovative Packaging Materials, Faculty of Food Sciences and Fisheries, West Pomeranian University of Technology Szczecin, Janickiego 35, 71-270 Szczecin, Poland; (E.D.); (P.T.); (A.B.)
| | - Alicja Dłubała
- Department of Applied Microbiology and Human Nutrition Physiology, West Pomeranian University of Technology Szczecin, Papieża Pawła VI 3, 71-899 Szczecin, Poland; (E.B.-W.); (A.D.)
| | - Kinga Mazurkiewicz-Zapałowicz
- Department of Hydrobiology, Ichthyology and Biotechnology of Reproduction, West Pomeranian University of Technology in Szczecin, Kazimierza Królewicza 4, 71-899 Szczecin, Poland;
| | - Artur Bartkowiak
- Center of Bioimmobilisation and Innovative Packaging Materials, Faculty of Food Sciences and Fisheries, West Pomeranian University of Technology Szczecin, Janickiego 35, 71-270 Szczecin, Poland; (E.D.); (P.T.); (A.B.)
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Influence of Drying Type of Selected Fermented Vegetables Pomace on the Natural Colorants and Concentration of Lactic Acid Bacteria. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11177864] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Nowadays, foods with probiotic bacteria are valuable and desired, because of their influence on human gut and health. Currently, in the era of zero waste, the food industry is interested in managing its waste. Therefore, the aim of the study was to determine the influence of drying process on the physicochemical properties of fermented vegetable pomace. The work included examining the influence of the lactic acid bacteria (Levilactobacillus brevis, Lactiplantibacillus plantarum, Limosilactobacillus fermentum and its mixture in the ratio 1:1:1) used for vegetable fermentation (beetroot, red pepper, carrot), obtaining pomace from fermented vegetables, and then selection of drying technique using the following methods: convection drying (CD) or freeze-drying (FD) on the physical and chemical properties of pomace. In the obtained pomace and its dried form, dry substance, water activity, color, and active substances such as betalains and carotenoids by spectrophotometric method and also bacteria concentration were evaluated. After fermentation of pomace from the same vegetable, a similar concentration of lactic acid bacteria was found as well as dry substances, color and colorants. Results of physico-chemical properties were related to the used vegetable type. After drying of pomace, it could be seen a high decrease in bacteria and colorant concentration (betalains, carotenoids) independently from drying and vegetable type as well as used starter cultures. The smallest change was observed for spontaneously fermented vegetables compared to those in which the starter culture was used.
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Nowacka M, Dadan M, Janowicz M, Wiktor A, Witrowa-Rajchert D, Mandal R, Pratap-Singh A, Janiszewska-Turak E. Effect of nonthermal treatments on selected natural food pigments and color changes in plant material. Compr Rev Food Sci Food Saf 2021; 20:5097-5144. [PMID: 34402592 DOI: 10.1111/1541-4337.12824] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Revised: 06/21/2021] [Accepted: 07/12/2021] [Indexed: 12/01/2022]
Abstract
In recent years, traditional high-temperature food processing is continuously being replaced by nonthermal processes. Nonthermal processes have a positive effect on food quality, including color and maintaining natural food pigments. Thus, this article describes the influence of nonthermal, new, and traditional treatments on natural food pigments and color changes in plant materials. Characteristics of natural pigments, such as anthocyanins, betalains, carotenoids, chlorophylls, and so forth available in the plant tissue, are shortly presented. Also, the characteristics and mechanism of nonthermal processes such as pulsed electric field, ultrasound, high hydrostatic pressure, pulsed light, cold plasma, supercritical fluid extraction, and lactic acid fermentation are described. Furthermore, the disadvantages of these processes are mentioned. Each treatment is evaluated in terms of its effects on all types of natural food pigments, and the possible applications are discussed. Analysis of the latest literature showed that the use of nonthermal technologies resulted in better preservation of pigments contained in the plant tissue and improved yield of extraction. However, it is important to select the appropriate processing parameters and to optimize this process in relation to a specific type of raw material.
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Affiliation(s)
- Małgorzata Nowacka
- Department of Food Engineering and Process Management, Institute of Food Sciences, Warsaw University of Life Sciences - SGGW, Warsaw, Poland
| | - Magdalena Dadan
- Department of Food Engineering and Process Management, Institute of Food Sciences, Warsaw University of Life Sciences - SGGW, Warsaw, Poland
| | - Monika Janowicz
- Department of Food Engineering and Process Management, Institute of Food Sciences, Warsaw University of Life Sciences - SGGW, Warsaw, Poland
| | - Artur Wiktor
- Department of Food Engineering and Process Management, Institute of Food Sciences, Warsaw University of Life Sciences - SGGW, Warsaw, Poland
| | - Dorota Witrowa-Rajchert
- Department of Food Engineering and Process Management, Institute of Food Sciences, Warsaw University of Life Sciences - SGGW, Warsaw, Poland
| | - Ronit Mandal
- Food, Nutrition and Health Program, Faculty of Land and Food Systems (LFS), The University of British Columbia, Vancouver, British Columbia, Canada
| | - Anubhav Pratap-Singh
- Food, Nutrition and Health Program, Faculty of Land and Food Systems (LFS), The University of British Columbia, Vancouver, British Columbia, Canada
| | - Emilia Janiszewska-Turak
- Department of Food Engineering and Process Management, Institute of Food Sciences, Warsaw University of Life Sciences - SGGW, Warsaw, Poland
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13
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Characteristics of the Proteolytic Enzymes Produced by Lactic Acid Bacteria. Molecules 2021; 26:molecules26071858. [PMID: 33806095 PMCID: PMC8037685 DOI: 10.3390/molecules26071858] [Citation(s) in RCA: 88] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 03/17/2021] [Accepted: 03/23/2021] [Indexed: 12/20/2022] Open
Abstract
Over the past several decades, we have observed a very rapid development in the biotechnological use of lactic acid bacteria (LAB) in various branches of the food industry. All such areas of activity of these bacteria are very important and promise enormous economic and industrial successes. LAB are a numerous group of microorganisms that have the ability to ferment sugars into lactic acid and to produce proteolytic enzymes. LAB proteolytic enzymes play an important role in supplying cells with the nitrogen compounds necessary for their growth. Their nutritional requirements in this regard are very high. Lactic acid bacteria require many free amino acids to grow. The available amount of such compounds in the natural environment is usually small, hence the main function of these enzymes is the hydrolysis of proteins to components absorbed by bacterial cells. Enzymes are synthesized inside bacterial cells and are mostly secreted outside the cell. This type of proteinase remains linked to the cell wall structure by covalent bonds. Thanks to advances in enzymology, it is possible to obtain and design new enzymes and their preparations that can be widely used in various biotechnological processes. This article characterizes the proteolytic activity, describes LAB nitrogen metabolism and details the characteristics of the peptide transport system. Potential applications of proteolytic enzymes in many industries are also presented, including the food industry.
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