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Current waste management policies favor biogases (digester gases (DGs) and landfill gases (LFGs)) valorization as it becomes a way for energy politics. However, volatile organic silicon compounds (VOSiCs) contained into DGs/LFGs severely damage combustion engines and endanger the conversion into electricity by power plants, resulting in a high purification level requirement. Assessing treatment efficiency is still difficult. No consensus has been reached to provide a standardized sampling and quantification of VOSiCs into gases because of their diversity, their physicochemical properties, and the omnipresence of silicon in analytical chains. Usually, samplings are done by adsorption or absorption and quantification made by gas chromatography-mass spectrometry (GC-MS) or inductively coupled plasma-optical emission spectrometry (ICP-OES). In this objective, this paper presents and discusses the optimization of a patented method consisting in VOSiCs sampling by absorption of 100% ethanol and quantification of total Si by ICP-OES.
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http://dx.doi.org/10.1155/2014/537080 | DOI Listing |
Int Microbiol
September 2025
School of Basic Sciences, Technology and Engineering, National Open and Distance University, Pasto, Nariño, Colombia.
This study investigates the impact of a defined starter culture on the fermentation of cocoa beans and its influence on the production of volatile and non-volatile compounds related to sensory quality. A microbial consortium comprising Saccharomyces cerevisiae, Pichia kudriavzevii, Levilactobacillus brevis, and Acetobacter okinawensis was selected based on their enzymatic activity and acid regulation properties. Fermentation trials showed that the starter culture enhanced the synthesis of key volatile compounds, particularly esters and higher alcohols, such as 2-phenylethanol and 2-phenylethyl acetate, which contribute floral and fruity aromas.
View Article and Find Full Text PDFArch Microbiol
September 2025
College of Agriculture and Biology, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, People's Republic of China.
Cystofilobasidium infirmominiatum, biotechnologically significant yeast, is increasingly garnering attention due to its superior ability to produce valuable carotenoids and lipids. Nonetheless, until now, the reference genome that governs the biosynthesis of carotenoids and lipids in C. infirmominiatum remains unreported.
View Article and Find Full Text PDFFront Plant Sci
August 2025
College of Agriculture, South China Agricultural University, Guangzhou, China.
Tobacco ( L.) is well-known as an economic crop whose quality is evaluated according to its aroma quality. Researchers have found that selenium application can increase the aroma quality of tobacco, but until now, its mechanism is still unclear.
View Article and Find Full Text PDFFood Sci Biotechnol
October 2025
Engineering Research Center of Storage and Processing of Xinjiang Characteristic Fruits and Vegetables, Ministry of Education, School of Food Science, Shihezi University, Shihezi, 832000 Xinjiang China.
The current work aimed to investigate the effects of fermentation of , , and on the physicochemical, electronic sensory evaluation, and flavour characteristics of heat-sterilized tomato juice (HTJ). The results indicated that LAB fermentation significantly decreased the pH, sucrose, and glucose, and lactic acid was increased. E-nose and tongue analyses revealed that the response to organic sulfides, terpenoids, and sourness increased after LAB fermentation HS-SPME-GC-MS and OAV revealed that heat-sterilization resulted a significant loss of aroma compounds (38.
View Article and Find Full Text PDFFood Chem X
August 2025
College of Agronomy, Northwest A&F University, State Key Laboratory of Crop Stress Biology in Arid Areas, Yangling 712100, Shaanxi Province, China.
Colored highland barley is a promising nutrient-rich functional food. However, antioxidant capacity after fermentation and the quality of the resulting wine remain unexplored. This study investigated how the accumulation of non-volatile metabolites in four fermented colored highland barley varieties influences antioxidant capacity and wine quality.
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