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Keywords = Chinese spirits distiller’s grains

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14 pages, 2346 KiB  
Article
The Screening and Isolation of Ethyl-Carbamate-Degrading Strains from Fermented Grains and Their Application in the Degradation of Ethyl Carbamate in Chinese Baijiu
by Siyu Xue, Naihui Dong, Kexin Xiong, Hui Guo, Yiwei Dai, Huipeng Liang, Yingxi Chen, Xinping Lin, Beiwei Zhu and Sufang Zhang
Foods 2023, 12(15), 2843; https://doi.org/10.3390/foods12152843 - 27 Jul 2023
Cited by 9 | Viewed by 1955
Abstract
Ethyl carbamate (EC), a 2A carcinogen produced during the fermentation of foods and beverages, primarily occurs in distilled spirits. Currently, most studies focus on strategies for EC mitigation. In the present research, we aimed to screen strains that can degrade EC directly. Here, [...] Read more.
Ethyl carbamate (EC), a 2A carcinogen produced during the fermentation of foods and beverages, primarily occurs in distilled spirits. Currently, most studies focus on strategies for EC mitigation. In the present research, we aimed to screen strains that can degrade EC directly. Here, we report two Candida ethanolica strains (J1 and J116), isolated from fermented grains, which can reduce EC concentrations directly. These two yeasts were grown using EC as the sole carbon source, and they grew well on different carbon sources. Notably, after immobilization with chitosan, the two strains degraded EC in Chinese Baijiu by 42.27% and 27.91% in 24 h (from 253.03 ± 9.89 to 146.07 ± 1.67 and 182.42 ± 5.05 μg/L, respectively), which was better than the performance of the non-immobilized strains. Furthermore, the volatile organic compound content, investigated using gas chromatography-mass spectrometry, did not affect the main flavor substances in Chinese Baijiu. Thus, the yeasts J1 and J116 may be potentially used for the treatment and commercialization of Chinese Baijiu. Full article
(This article belongs to the Special Issue Research Progress of Yeasts and Molds in Fermented Food Production)
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24 pages, 4594 KiB  
Article
Barrier Properties and Hydrophobicity of Biodegradable Poly(lactic acid) Composites Reinforced with Recycled Chinese Spirits Distiller’s Grains
by Zhi-Jun Chen, Chi-Hui Tsou, Meng-Lin Tsai, Jipeng Guo, Manuel Reyes De Guzman, Tao Yang, Chen Gao, Yan Lei, Pei-Wen Gan, Shuang Chen, Lian-Jie Tu, Chang-Lei Qu, Ruo-Yao Wang and Chin-San Wu
Polymers 2021, 13(17), 2861; https://doi.org/10.3390/polym13172861 - 26 Aug 2021
Cited by 16 | Viewed by 2794
Abstract
Adding natural biomass to poly(lactic acid) (PLA) as a reinforcing filler is a way to change the properties of PLA. This paper is about preparing PLA/biomass composites by physically melting and blending Chinese Spirits distiller’s grains (CSDG) biomass and PLA to optimize the [...] Read more.
Adding natural biomass to poly(lactic acid) (PLA) as a reinforcing filler is a way to change the properties of PLA. This paper is about preparing PLA/biomass composites by physically melting and blending Chinese Spirits distiller’s grains (CSDG) biomass and PLA to optimize the composite performance. Composites of modified PLA (MPLA) with varying amounts of CSDG were also prepared by the melt-mixing method, and unmodified PLA/CSDG composites were used as a control group for comparative analysis. The functional groups of MPLA enhanced the compatibility between the polymer substrate and CSDG. The composite water vapor/oxygen barrier and mechanical properties were studied. It was found that the barrier and mechanical properties of MPLA/CSDG composites were significantly improved. SEM was adopted to examine the tensile section structure of the composites, and the compatibility between the filler and the matrix was analyzed. An appropriate amount of CSDG had a better dispersibility in the matrix, and it further improved the interfacial bonding force, which in turn improved the composite mechanical properties. X-ray diffraction, thermogravimetric analysis, and differential scanning calorimetry were conducted to determine the crystalline properties and to analyze the stability of the composites. It was found that the CSDG content had a significant effect on the crystallinity. Barrier and biodegradation mechanisms were also discussed. Full article
(This article belongs to the Special Issue Advances in Bio-Based and Biodegradable Polymeric Composites)
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