Article
Engineering, Civil
Ping Yang, Shujun Ye, Brent Sleep
Summary: This study analyzed the impact of microbial growth and methane generation on groundwater flow during anaerobic bioremediation. The results showed that microbial growth and biogenic gas production can increase the dispersivity of groundwater. Model predictions of dispersivity changes differed from actual values.
JOURNAL OF HYDROLOGY
(2021)
Article
Food Science & Technology
Oceane Savary, Jerome Mounier, Anne Thierry, Elisabeth Poirier, Julie Jourdren, Marie-Bernadette Maillard, Marine Penland, Christophe Decamps, Emmanuel Coton, Monika Coton
Summary: A tailor-made microbial consortium representative of the core Kombucha microbiota was successfully used to drive the fermentation process. Organic acids such as acetic, lactic, succinic, and oxalic acids were produced, along with a gradual increase in gluconic and glucuronic acids during fermentation. The volatile profile also shifted throughout the fermentation process, with a variety of compounds identified at different stages.
FOOD RESEARCH INTERNATIONAL
(2021)
Article
Mechanics
Ofer Manor
Summary: The study focuses on calculating steady acoustic flow in porous media and explaining its contribution to mass transport. Various cases of steady acoustic flow are analyzed for different scales, and different methods of handling acoustic flow under different conditions are discussed.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Mechanics
B. M. Shankar, I. S. Shivakumara
Summary: The study investigates the linear stability of plane porous-Couette flow with a uniform vertical throughflow using the Brinkman-extended Darcy equation, revealing the presence of different onset modes due to the throughflow. The impacts of the throughflow dependent modified Reynolds number and the modified porous parameter on the critical values defining instability thresholds are significant. The stability characteristics of this flow in a porous medium with throughflow differ notably from cases with no throughflow and non-porous conditions.
Article
Environmental Sciences
Jing Zhao, Gaofeng Ni, Maria Piculell, Jie Li, Zhetai Hu, Zhiyao Wang, Jianhua Guo, Zhiguo Yuan, Min Zheng, Shihu Hu
Summary: This study investigated the establishment, structure, and microbial community composition of biofilms in three laboratory-scale moving bed biofilm reactors, and found that the depth of living space significantly influenced the biofilm formation and community composition.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Water Resources
Shilin Wang, Yong Yang, Taijia Lu, Yu Chen, Chunming Jin, Yanfeng Gong, Liping Chen
Summary: This study developed a novel algorithm that couples flow at the pore and representative elementary volume (REV) scales to analyze the impact of microbial growth on the permeability decay of porous media. It provides a new method for investigating microbial clogging in porous media. The algorithm uses an immersed boundary-lattice Boltzmann model and cellular automata model to simulate flow and solute transportation at the pore scale, and a generalized seepage model at the REV scale.
ADVANCES IN WATER RESOURCES
(2023)
Article
Microbiology
Yue Zhang, Yan He, Eric G. Sakowski, Sarah P. Preheim
Summary: This study investigates how various bacterial strains colonizing porous media affect bacterial retention, showing that the composition of biofilm microbial communities significantly influences filter performance.
MICROBIOLOGY SPECTRUM
(2021)
Article
Biochemistry & Molecular Biology
Javiera Anguita, Gonzalo Pizarro, Ignacio T. Vargas
Summary: A mechanistic mathematical model of microbial corrosion induced by sulfate-reducing bacteria (SRB) through extracellular electron transfer (EET) was developed and implemented in this study. The simulations of biofilm development and growth-associated corrosion were in agreement with experimental evidence, revealing the main parameters controlling MIC.
BIOELECTROCHEMISTRY
(2022)
Article
Multidisciplinary Sciences
Yichao Wu, Chengxia Fu, Caroline L. Peacock, Soren J. Sorensen, Marc A. Redmile-Gordon, Ke-Qing Xiao, Chunhui Gao, Jun Liu, Qiaoyun Huang, Zixue Li, Peiyi Song, Yongguan Zhu, Jizhong Zhou, Peng Cai
Summary: Cooperative interactions between free-living and biofilm-forming bacteria are found to drive spatial segregation and enable species coexistence in a microfluidic chip environment, promoting their respective dominance in segregated microhabitats. This active spatial segregation is induced by cooperative interactions, improving the fitness of both biofilm and planktonic populations. The study also shows that free-living Arthrobacter induces surface colonization and receives benefits from public goods secreted by biofilm-forming strains.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Ceramics
Shynar Kultayeva, Young-Wook Kim, In-Hyuck Song
Summary: The study found that doping significantly affects the properties of porous SiC ceramics, with electrical resistivity strongly influenced by doping while thermal and mechanical properties primarily dependent on the necking area between grains. Results show that the electrical conductivity of porous SiC ceramics can be successfully tuned independently of the thermal conductivity through suitable doping.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Engineering, Chemical
Y. H. Nkocko Awountsa, G. P. J. Diedericks, G. J. F. Smit, S. Woudberg
Summary: Analytical expressions for the formation factor as a function of porosity are derived based on the Representative Unit Cell model. Numerical simulations and experimental validation demonstrate the effectiveness of these models. The study also reveals a significant improvement in prediction accuracy when considering the percolation threshold porosity.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Chengjie Du, Guisheng Zou, Jinpeng Huo, Bin Feng, Zhanwen A, Lei Liu
Summary: This paper presents a method to design the microstructure of porous thermal interface materials (TIM) with desired effective thermal conductivity (ETC) using a generative artificial intelligence (AI) model. Sintered silver was used as an example, and a conditional generative adversarial network (CGAN) model was employed to generate microstructures with excellent morphology realism. The ETC values of the generated microstructures were evaluated using a convolution neural network (CNN) model. The results show that the generative AI model is effective in synthesizing microstructures of porous TIM with desired ETC, and the approach can be generalized to design microstructures of other porous media and composites.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Materials Science, Ceramics
Shynar Kultayeva, Young-Wook Kim, In-Hyuck Song
Summary: The study investigated the effects of BN content in porous SiC ceramics on their electrical, thermal, and mechanical properties in N2 and Ar atmospheres. It was found that the electrical resistivity was mainly controlled by the sintering atmosphere, while the thermal conductivity and flexural strength were more influenced by porosity and necking area changes between SiC grains.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Food Science & Technology
Muwen He, Yao Jin, Rongqing Zhou, Dong Zhao, Jia Zheng, Chongde Wu
Summary: This study investigated the dynamics of physicochemical properties, microbial communities, and volatile compounds during the manufacture of Nongxiangxing daqu, a fermentation starter for Chinese baijiu. The results showed that Lactobacillus and Weissella were the predominant bacterial genera, while Thermoascus, Pichia, and Rhizopus were the dominant fungi in daqu. The acidity was positively correlated with Lactobacillus, and saccharification power was positively correlated with Aspergillus, Rhizomucor, Rasamsonia, and Thermoascus. Esters were identified as the main aroma components in daqu, and they were positively correlated with fungi. Key enzymes involved in carbohydrate hydrolysis, ethanol fermentation, and flavor formation were also revealed.
FOOD RESEARCH INTERNATIONAL
(2022)
Article
Chemistry, Physical
Shiwei Qian, Xiaoshuai Wu, Zhuanzhuan Shi, Xiaofen Li, Xin Sun, Yongjia Ma, Wei Sun, Chunxian Guo, ChangMing Li
Summary: In this study, a hierarchically porous nanowires-material is carefully tuned for an optimal pore structure by adjusting the weight percentage of SiO2-hard template. The as-prepared nanowires are used as an anode in microbial fuel cells, showing significantly improved output power density.