scholarly journals Do Kombucha Symbiotic Cultures of Bacteria and Yeast Affect Bacterial Cellulose Yield in Molasses?

2021 ◽  
Vol 7 (9) ◽  
pp. 705
Author(s):  
Putu Virgina Partha Devanthi ◽  
Katherine Kho ◽  
Rizky Nurdiansyah ◽  
Arnaud Briot ◽  
Mohammad J. Taherzadeh ◽  
...  
Keyword(s):  
Bacterial Cellulose ◽  
Reducing Sugars ◽  
Negative Impact ◽  
Yield Reduction ◽  
Dekkera Bruxellensis ◽  
Sugar Utilization ◽  
Single Culture ◽  
Food Applications ◽  
Ph Increase ◽  
Potential Food

Bacterial cellulose (BC) is a valuable biopolymer typically observed in Kombucha with many potential food applications. Many studies highlight yeast’s roles in providing reducing sugars, used by the bacteria to grow and produce BC. However, whether yeast could enhance the BC yields remains unclear. This study investigates the effect of yeast Dekkera bruxellensis on bacteria Komagataeibacter intermedius growth and BC production in molasses medium. The results showed that the co-culture stimulated K. intermedius by ~2 log CFU/mL, which could be attributed to enhanced reducing sugar utilization. However, BC yields decreased by ~24%, suggesting a negative impact of D. bruxellensis on BC production. In contrast to other studies, regardless of D. bruxellensis, K. intermedius increased the pH to ~9.0, favoring the BC production. Furthermore, pH increase was slower in co-culture as compared to single culture cultivation, which could be the reason for lower BC yields. This study indicates that co-culture could promote synergistic growth but results in the BC yield reduction. This knowledge can help design a more controlled fermentation process for optimum bacterial growth and, ultimately, BC production.

Bacterial cellulose for food applications

2018 ◽  
Vol 1 (2) ◽  
pp. 2 ◽  
Author(s):  
Henriette MC Azeredo
Keyword(s):  
Bacterial Cellulose ◽  
Biomedical Applications ◽  
Food Industry ◽  
Cellulose Nanofibrils ◽  
Food Product ◽  
Cost Effective ◽  
Potential Applications ◽  
Food Applications ◽  
Potential Food ◽  
Fermentation Media

Bacterial cellulose (BC), which is usually produced as pure membranes (sheets) by some bacteria, has been widely studied as a nanomaterial with unique properties for a variety of applications, but it has been actually used mostly for biomedical applications. There are many potential food applications that have not been adequately explored, nata de coco being virtually the only food product from BC on the market. Food applications have usually been considered as less economically feasible, but several studies had demonstrated the suitability of cost-effective fermentation media for producing BC, widening its scope of applications. BC may be used in foods as intact membranes impregnated with other components, or after disintegration or hydrolysis to produce bacterial cellulose nanofibrils or nanocrystals. Abrief overview of actual and potential applications of bacterial cellulose in food industry is presented.

scholarly journals Spent Brewer’s Yeast as a Source of Insoluble β-Glucans

2021 ◽  
Vol 22 (2) ◽  
pp. 825
Author(s):  
Ionut Avramia ◽  
Sonia Amariei
Keyword(s):  
Emulsion Stability ◽  
Extraction Process ◽  
Brewer’S Yeast ◽  
Brewer's Yeast ◽  
Brewing Process ◽  
Food Applications ◽  
Water Holding ◽  
Potential Food ◽  
Insight Into

In the brewing process, the consumption of resources and the amount of waste generated are high and due to a lot of organic compounds in waste-water, the capacity of natural regeneration of the environment is exceeded. Residual yeast, the second by-product of brewing is considered to have an important chemical composition. An approach with nutritional potential refers to the extraction of bioactive compounds from the yeast cell wall, such as β-glucans. Concerning the potential food applications with better textural characteristics, spent brewer’s yeast glucan has high emulsion stability and water-holding capacity fitting best as a fat replacer in different food matrices. Few studies demonstrate the importance and nutritional role of β-glucans from brewer’s yeast, and even less for spent brewer’s yeast, due to additional steps in the extraction process. This review focuses on describing the process of obtaining insoluble β-glucans (particulate) from spent brewer’s yeast and provides an insight into how a by-product from brewing can be converted to potential food applications.

scholarly journals Safety verification of genetically modified rice morphology, hereditary nature, and quality

2021 ◽  
Vol 33 (1) ◽  
Author(s):  
Dong Won Jeon ◽  
Jae-Ryoung Park ◽  
Yoon-Hee Jang ◽  
Eun-Gyeong Kim ◽  
Taehun Ryu ◽  
...  
Keyword(s):  
Climate Change ◽  
Gene Flow ◽  
Negative Impact ◽  
Genetically Modified ◽  
Germination Rate ◽  
Future Climate Change ◽  
Yield Reduction ◽  
Drought Tolerant ◽  
Gm Plants ◽  
Gm Rice

Abstract Background The drought environment occurs frequently due to the unpredictable future climate change, and drought has a direct negative impact on crops, such as yield reduction. Drought events are random, frequent, and persistent. Molecular breeding can be used to create drought-tolerant food crops, but the safety of genetically modified (GM) plants must be demonstrated before they can be adopted. In this research, the environmental risk of drought-tolerant GM rice was explored by assessing phenotype and gene flow. Drought resistance genes CaMsrB2 inserted HV8 and HV23 were used as GM rice to analyze the possibility of various agricultural traits and gene flow along with non-GM rice. Results When the traits 1000-grain weight, grain length/width, and yield, were compared with GM rice and non-GM rice, all agricultural traits of GM rice and non-GM rice were the same. In addition, when the germination rate, viviparous germination rate, pulling strength, and bending strength were compared to analyze the possibility of weediness, all characteristic values of GM rice and non-GM rice were the same. Protein, amylose, and moisture, the major nutritional elements of rice, were also the same. Conclusions The results of this research are that GM rice and non-GM rice were the same in all major agricultural traits except for the newly assigned characteristics, and no gene mobility occurred. Therefore, GM rice can be used as a means to solve the food problem in response to the unpredictable era of climate change in the future.

Polysaccharides-based bio-nanostructures and their potential food applications

2021 ◽  
Vol 176 ◽  
pp. 540-557
Author(s):  
Muhammad Bilal ◽  
Ijaz Gul ◽  
Aneela Basharat ◽  
Sarmad Ahmad Qamar
Keyword(s):  
Food Applications ◽  
Potential Food

Logging impacts on forest carabid assemblages in Japan

2005 ◽  
Vol 35 (11) ◽  
pp. 2698-2708 ◽  
Author(s):  
Naoya Osawa ◽  
Atsumi Terai ◽  
Keiichi Hirata ◽  
Asami Nakanishi ◽  
Ayumi Makino ◽  
...  
Keyword(s):  
Small Area ◽  
Niche Breadth ◽  
Negative Impact ◽  
Forest Disturbance ◽  
Carabid Beetles ◽  
Large Carnivores ◽  
Experimental Station ◽  
Logging Impacts ◽  
Number Of Individuals ◽  
Potential Food

We hypothesized that small-area logging (<1 ha) would greatly affect microhabitats of carabid beetles. To test this hypothesis, we studied the carabid assemblages at Kamigamo Experimental Station, Kyoto, Japan, from June 1999 to May 2001. From the analysis of the number of individuals and niche breadth, the numbers of large carnivores (Carabus dehanii Chaudoir, Carabus maiyasanus Bates, and Carabus yaconinus Bates) and large insectivores (Chlaenius posticalis Motschulsky and Haplochlaenius costiger (Chaudoir)) decreased because of logging, whereas the small carabids, Synuchus arcuaticollis (Motschulsky) and Synuchus cycloderus (Bates), may not have been negatively influenced by logging. The mass of the FH layer significantly affected the total number of Pterostichus latemarginatus (Straneo) and marginally affected the number of S. cycloderus. However, soil water content (%) and the mass of the L layer did not affect the total number of individuals in any species. The results of this study imply that (1) the richness of the FH layer and vegetation, that is, the potential food abundance and habitat richness, is involved in determining species richness and the density of the carabid assemblages and (2) even small-area logging may have a negative impact on the density of the large predatory carabids, which are sensitive indicators of forest disturbance.

scholarly journals Monitoring lactic acid concentrations by infrared spectroscopy: A new developed method for Lactobacillus fermenting media with potential food applications

2017 ◽  
Vol 46 (4) ◽  
pp. 420-427 ◽  
Author(s):  
A. Păucean ◽  
D.C. Vodnar ◽  
V. Mureșan ◽  
F. Fetea ◽  
F. Ranga ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Infrared Spectroscopy ◽  
Food Applications ◽  
Potential Food
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