{"title":"通过气泡等离子激活空气保持新鲜螺旋藻(节藻)的质量和安全性","authors":"","doi":"10.1016/j.algal.2024.103754","DOIUrl":null,"url":null,"abstract":"<div><div>Spirulina (<em>Arthrospira platensis</em>) is a blue-green alga valued for its protein, phycocyanin, and other bioactive compounds. However, its commercial outdoor cultivation makes it susceptible to microbial contamination, affecting both biomass productivity and quality. Additionally, most commercial Spirulina is sold in dried forms such as powder, flakes, and tablets, which can degrade these bioactive components. To address these issues, non-thermal techniques, such as cold plasma, offer a promising solution by effectively reducing microbial contamination while preserving product quality without the need for drying. This study investigated the potential of bubbling cold plasma-activated (BCPA) air through freshly grown Spirulina to reduce microbial contamination and maintain quality during storage. Spirulina grown in an outdoor paddle-wheel driven pond was harvested in paste form, resuspended in deionized water, treated with plasma-activated air and stored at 4 °C for 28 days. The treatment significantly reduced microbial contamination and maintained Spirulina biomass and pigment contents compared to untreated control. The cellular structure remained intact, and colour changes were minimal in the treated samples when compared to the controls. Moreover, the Spirulina suspension pH became acidic (pH = 4), and oxidation-reduction potential was significantly higher (>150 mV) in treated samples compared to controls throughout the storage period. The results demonstrate the potential for BCPA air to maintain the quality of fresh Spirulina. This finding may have significant applications in the Spirulina industry for offering customers fresh products rather than dried Spirulina.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":null,"pages":null},"PeriodicalIF":4.6000,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Quality and safety of fresh Spirulina (Arthrospira platensis) maintained by bubbling plasma-activated air\",\"authors\":\"\",\"doi\":\"10.1016/j.algal.2024.103754\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Spirulina (<em>Arthrospira platensis</em>) is a blue-green alga valued for its protein, phycocyanin, and other bioactive compounds. However, its commercial outdoor cultivation makes it susceptible to microbial contamination, affecting both biomass productivity and quality. Additionally, most commercial Spirulina is sold in dried forms such as powder, flakes, and tablets, which can degrade these bioactive components. To address these issues, non-thermal techniques, such as cold plasma, offer a promising solution by effectively reducing microbial contamination while preserving product quality without the need for drying. This study investigated the potential of bubbling cold plasma-activated (BCPA) air through freshly grown Spirulina to reduce microbial contamination and maintain quality during storage. Spirulina grown in an outdoor paddle-wheel driven pond was harvested in paste form, resuspended in deionized water, treated with plasma-activated air and stored at 4 °C for 28 days. The treatment significantly reduced microbial contamination and maintained Spirulina biomass and pigment contents compared to untreated control. The cellular structure remained intact, and colour changes were minimal in the treated samples when compared to the controls. Moreover, the Spirulina suspension pH became acidic (pH = 4), and oxidation-reduction potential was significantly higher (>150 mV) in treated samples compared to controls throughout the storage period. The results demonstrate the potential for BCPA air to maintain the quality of fresh Spirulina. This finding may have significant applications in the Spirulina industry for offering customers fresh products rather than dried Spirulina.</div></div>\",\"PeriodicalId\":7855,\"journal\":{\"name\":\"Algal Research-Biomass Biofuels and Bioproducts\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.6000,\"publicationDate\":\"2024-10-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Algal Research-Biomass Biofuels and Bioproducts\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2211926424003667\",\"RegionNum\":2,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"BIOTECHNOLOGY & APPLIED MICROBIOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Algal Research-Biomass Biofuels and Bioproducts","FirstCategoryId":"99","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2211926424003667","RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"BIOTECHNOLOGY & APPLIED MICROBIOLOGY","Score":null,"Total":0}
Quality and safety of fresh Spirulina (Arthrospira platensis) maintained by bubbling plasma-activated air
Spirulina (Arthrospira platensis) is a blue-green alga valued for its protein, phycocyanin, and other bioactive compounds. However, its commercial outdoor cultivation makes it susceptible to microbial contamination, affecting both biomass productivity and quality. Additionally, most commercial Spirulina is sold in dried forms such as powder, flakes, and tablets, which can degrade these bioactive components. To address these issues, non-thermal techniques, such as cold plasma, offer a promising solution by effectively reducing microbial contamination while preserving product quality without the need for drying. This study investigated the potential of bubbling cold plasma-activated (BCPA) air through freshly grown Spirulina to reduce microbial contamination and maintain quality during storage. Spirulina grown in an outdoor paddle-wheel driven pond was harvested in paste form, resuspended in deionized water, treated with plasma-activated air and stored at 4 °C for 28 days. The treatment significantly reduced microbial contamination and maintained Spirulina biomass and pigment contents compared to untreated control. The cellular structure remained intact, and colour changes were minimal in the treated samples when compared to the controls. Moreover, the Spirulina suspension pH became acidic (pH = 4), and oxidation-reduction potential was significantly higher (>150 mV) in treated samples compared to controls throughout the storage period. The results demonstrate the potential for BCPA air to maintain the quality of fresh Spirulina. This finding may have significant applications in the Spirulina industry for offering customers fresh products rather than dried Spirulina.
期刊介绍:
Algal Research is an international phycology journal covering all areas of emerging technologies in algae biology, biomass production, cultivation, harvesting, extraction, bioproducts, biorefinery, engineering, and econometrics. Algae is defined to include cyanobacteria, microalgae, and protists and symbionts of interest in biotechnology. The journal publishes original research and reviews for the following scope: algal biology, including but not exclusive to: phylogeny, biodiversity, molecular traits, metabolic regulation, and genetic engineering, algal cultivation, e.g. phototrophic systems, heterotrophic systems, and mixotrophic systems, algal harvesting and extraction systems, biotechnology to convert algal biomass and components into biofuels and bioproducts, e.g., nutraceuticals, pharmaceuticals, animal feed, plastics, etc. algal products and their economic assessment