Article
Biotechnology & Applied Microbiology
Kasper D. de Leeuw, Theresa Ahrens, Cees J. N. Buisman, David P. B. T. B. Strik
Summary: Chain elongation fermentation allows for the synthesis of biobased chemicals from complex organic residue streams. Investigation into increasing selectivity towards branched chain elongation showed that increasing CO2 load led to more in situ acetate formation, which increased overall chain elongation rate but decreased the selectivity of branched chain elongation. This work demonstrates the potential for adapting chain elongation microbiomes with branched-electron acceptors to form longer chain products like iso-caproate and iso-heptanoate.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2021)
Article
Engineering, Chemical
Li-Jen Lin, Mukesh Saini, Chung-Jen Chiang, Yun-Peng Chao
Summary: In this study, a whole cell biocatalysis system was used to produce short-chain alcohols from fatty acids. Escherichia coli strain was reprogrammed to improve biocatalytic activity, resulting in successful production of 1-propanol and n-pentanol.
Article
Chemistry, Multidisciplinary
Meron Getahun, Yonatan Nesru, Muktar Ahmed, Sunita Satapathy, Kebede Shenkute, Neeraj Gupta, Mohammed Naimuddin
Summary: This study investigated the potential of Acanthus polystachyus extracts as antimicrobials and found that they have antioxidant and antimicrobial properties, with high inhibition against some resistant microbes, as well as inhibition of biofilm formation and bacteria signalling. These results suggest that Acanthus polystachyus extracts may be a natural solution to effectively combat resistant microbes.
Article
Cell Biology
Janine Mett, Anna A. Lauer, Daniel Janitschke, Lea V. Griebsch, Elena L. Theiss, Heike S. Grimm, Hennariikka Koivisto, Heikki Tanila, Tobias Hartmann, Marcus O. W. Grimm
Summary: Research has shown that insulin-degrading enzyme plays a crucial role in the degradation and homeostasis of Aβ protein, and saturated medium-chain fatty acids can increase Aβ degradation. MCFAs can promote IDE secretion, enhance enzyme activity, and may be beneficial in preventing or treating Alzheimer's disease.
Article
Food Science & Technology
Goly Fayaz, Ombretta Polenghi, Agata Giardina, Virna Cerne, Sonia Calligaris
Summary: This research investigated the impact of various gelator molecules on the structural properties of oleogels containing MCTs, with different gelators showing varying abilities to structure MCTs at different concentrations. The stronger network strength of oleogels was observed with the increase of gelator concentration. These findings could aid in selecting the best MCT structuring agent for specific food applications.
INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
(2021)
Article
Agricultural Engineering
Qinglian Wu, Yong Jiang, Ying Chen, Min Liu, Xian Bao, Wanqian Guo
Summary: This review provides a comprehensive analysis of the opportunities and challenges in the production and application of medium chain fatty acids (MCFAs), including introduction and comparison of two microbial synthesis pathways, analysis of production bottlenecks and solutions, assessment of production strategies, and recommendations for future alternative production modes and research priorities.
BIORESOURCE TECHNOLOGY
(2021)
Review
Food Science & Technology
Yee-Ying Lee, Teck-Kim Tang, Eng-Seng Chan, Eng-Tong Phuah, Oi-Ming Lai, Chin-Ping Tan, Yong Wang, Nur Azwani Ab Karim, Noorlida Habi Mat Dian, Joo Shun Tan
Summary: Structured lipids are a modified form of lipid aimed at improving the nutritional and functional properties of conventional fats and oils. Examples of this new generation of healthful lipids, such as MCT and MLCT, are mainly composed of MCFA and have shown multiple physiological and functional properties.
CRITICAL REVIEWS IN FOOD SCIENCE AND NUTRITION
(2022)
Article
Biochemistry & Molecular Biology
Qi Hui Sam, Hua Ling, Wen Shan Yew, Zhaohong Tan, Sharada Ravikumar, Matthew Wook Chang, Louis Yi Ann Chai
Summary: Short chain fatty acids (SCFA) and medium chain fatty acids (MCFA) have divergent immunomodulatory propensities, with SCFA down-attenuating pro-inflammatory response through the TLR4 pathway, while MCFA augmenting inflammation through TLR2.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Review
Agricultural Engineering
Jung Ho Ahn, Eui Seok Lim, Sang Min Kim, Sung Ok Han, Youngsoon Um
Summary: This review comprehensively summarizes current advances in microbial production of medium chain length fatty acids (MCFAs) from renewable resources. Detailed information is provided on two major MCFA production pathways using various renewable resources and other auxiliary pathways. In addition, conventional and well-studied MCFA producers are classified into two categories, natural and synthetic producers, and their characteristics on MCFA production are outlined. Moreover, various engineering strategies employed to achieve the highest MCFAs production up to date are showcased together with key enzymes suggested for MCFA overproduction. Finally, future challenges and perspectives are discussed towards more efficient production of bio-based MCFA production.
BIORESOURCE TECHNOLOGY
(2023)
Article
Polymer Science
Hathaithep Senkum, Peter Kelly, William M. Gramlich
Summary: Well-defined and densely grafted amphiphilic cationic bottlebrush block copolymers were successfully generated and shown to self-assemble into distinct nanometer-scale domains whose morphologies could be manipulated by various factors. Upon water exposure, the thin films exhibited surface roughening and morphology changes. However, thermally annealed films with specific block fractions remained water-stable after submersion.
Article
Biotechnology & Applied Microbiology
Karolina Szacherska, Krzysztof Moraczewski, Sylwester Czaplicki, Piotr Oleskowicz-Popiel, Justyna Mozejko-Ciesielska
Summary: This study evaluated the use of short- and medium-chain fatty acids (SMCFAs) derived from acid whey fermentation for polyhydroxyalkanoate (PHA) production. Pseudomonas sp. GL06 showed the highest tolerance to SMCFAs and produced PHAs with the highest productivity. Further research revealed that PHA monomeric composition varied with bacterial strain and growth medium. The copolymer made of 3-hydroxybutyric, -hexanoic, -octanoic, -decanoic, and -dodecanoic exhibited promising properties.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Environmental Sciences
Jing Chen, Kimitaka Kawamura, Wei Hu, Cong-Qiang Liu, Qiang Zhang, Pingqing Fu
Summary: The study investigated terrestrial lipid biomarkers in marine aerosols collected at Chichijima Island in the western North Pacific for two 4-year periods. The results showed an increase in atmospheric levels of these tracers from 1990-1993 to 2006-2009, with seasonal trends characterized by winter-spring maxima and summer-fall minima. The main source regions of HMW lipids were identified as the Asian continent, Southeast Asia, and the Central Pacific, with stronger positive correlations observed between HMW lipid compounds and levoglucosan during 2006-2009, suggesting a significant contribution from biomass-burning emissions in this century.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Polymer Science
Irina G. Panova, Alexander A. Kiushov, Dolgor D. Khaydapova, Sergey B. Zezin, Maxim S. Arzhakov, Alexander A. Yaroslavov
Summary: This study focused on investigating the physicochemical, mechanical, and structural aspects of the interaction between capillary water-saturated kaolinite and polyelectrolytes. Modification of kaolinite with a negligible amount of hydrophilic and amphiphilic polyelectrolytes was found to provide control over the rheological parameters of kaolinite suspensions. This research shows the potential for producing a variety of clay materials with minor amounts of polymer modifying agents.
Article
Chemistry, Analytical
Carmela Maria Montone, Sara Elsa Aita, Giuseppe Cannazza, Chiara Cavaliere, Andrea Cerrato, Cinzia Citti, Luigi Mondello, Susy Piovesana, Aldo Lagana, Anna Laura Capriotti
Summary: The paper presents a targeted quantitative method for analyzing policosanols in hemp inflorescence, using high resolution mass spectrometry. The study validated a quantitative method for the most abundant policosanols in industrial hemp extracts and found hemp wax to be rich in certain policosanols, which may have potential for revalorization. Additionally, the data acquired were used for untargeted qualitative analysis of policosanols, allowing annotation of underivatized policosanols up to C33.
Article
Agricultural Engineering
Yanyan Zhang, Jiazhe Bai, Jiane Zuo
Summary: This study conducted a long-term anaerobic fermentation of food waste without external electron donors for efficient production of medium-chain fatty acids (MCFAs). The results showed that the highest concentration of total MCFAs reached 29,886.10 mg COD/L, with n-caproate being the primary product at a maximum concentration of 28,191.66 mg COD/L. Microbial composition analysis revealed the presence of Lactobacillus, Bifidobacterium, Sporanaerobacter, and Caproiciproducens as the core community throughout the process. Metagenomic analysis identified the reverse beta-oxidization (RBO) and fatty acid biosynthesis (FAB) pathways, with FAB pathway being the main CE pathway. Moreover, Unclassified_-f_Ruminococcaceae and Limosilactobacillus were found to be the main participants in the FAB pathway. This study provides valuable insights into MCFAs production from organic waste.
BIORESOURCE TECHNOLOGY
(2023)
Article
Chemistry, Physical
Jiatong Jiang, Xin Kang, Hairong Wu, Yao Lu, Zhe Li, Derong Xu, Tao Ma, Hongbin Yang, Wanli Kang
Summary: The application of spontaneous emulsification method using HPVA/CTAB compound system showed an additional oil recovery of 12.4% in low permeability cores, making it an ideal candidate for oil recovery enhancement. The synergistic effect of compound system enhanced the intermolecular attraction between HPVA molecule and CTAB molecule, leading to better stability of emulsions.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Mechanics
Menglan Li, Wanli Kang, Zhe Li, Hongbin Yang, Ruxue Jia, Yingqi He, Xin Kang, Zhongwen Zheng, Yongdong Wang, Bauyrzhan Sarsenbekuly, Maratbek Gabdullin
Summary: Nanoemulsions with small particle size, uniform dispersion, and long-term stability were prepared using the emulsification inverse phase method at a constant temperature. The effects of emulsifier and water content, salinity, and reservoir temperature on the stability of the nanoemulsion were studied, with results showing that increasing emulsifier content can enhance stability. The oil washing efficiency of the nanoemulsion can reach as high as 83%, providing theoretical support for efficient flooding systems in low-permeability reservoirs.
Article
Chemistry, Physical
Tongyu Zhu, Wanli Kang, Hongbin Yang, Zhe Li, Bobo Zhou, Yingqi He, Jiaqi Wang, Saule Aidarova, Bauyrzhan Sarsenbekuly
Summary: This article primarily introduces the application of microemulsion in the petroleum industry, including its concept, preparation methods, and use in improving oil recovery. In addition, the challenges and prospects of microemulsion in this field are analyzed.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Min Zhang, Wanli Kang, Hongbin Yang, Bobo Zhou, Zhe Li, Yingqi He, Korobov Grigory Yurievich, Lekomtsev Alexander Viktorovich
Summary: By using environmentally friendly beta-cyclodextrin as a reverse demulsifier, the dewatering rate of O/W emulsion could be effectively increased. The host-guest inclusion interaction was found to disassemble the network structure of APP4, leading to a significant decrease in structural viscosity and promoting rapid growth of the droplets.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Energy & Fuels
Derong Xu, Zhe Li, Baojun Bai, Xin Chen, Hairong Wu, Jirui Hou, Wanli Kang
Summary: This study systematically investigated the static imbibition efficiencies of different surfactants based on molecular structures, finding that sulfate anionic surfactants showed better wettability alteration ability than sulfonate surfactants. Increasing the hydrophilicity of surfactants by introducing the ethylene oxide (EO) groups to the surfactant structures was effective in enhancing wettability alteration ability. Surfactants with longer carbon chain (C16 surfactants) enhanced more imbibition recovery than short carbon chain surfactants (C12 surfactants).
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Peng Lian, Han Jia, Hui Yan, Jie Yuan, Hongtao Tang, Zhe Li, Fangning Fan, Xuwen Qin, Kaihe Lv, Dexin Liu
Summary: In this study, the behavior of a mixed micelle of typical anionic and nonionic surfactants in the water phase was investigated using molecular dynamics simulation. The nonionic surfactant was found to significantly reduce the hydrophilicity of the mixed micelle, thereby promoting its tendency for interfacial adsorption.
Article
Chemistry, Physical
Han Jia, Shaoyan Wang, Zhe Wang, Qiang Wang, Haidong Jia, Lin Song, Xuwen Qin, Fangning Fan, Zhe Li, Pan Huang
Summary: The study synthesized a series of novel fatty acid-based ionic liquids (FAILs) and evaluated their inhibition ability through experiments, finding that [N8881][C8:0] showed better inhibition performance at a lower concentration. The inhibition mechanism of these ionic liquids was studied using various analytical techniques.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Energy & Fuels
Hairong Wu, Xin Chen, Rong Tan, Yinglin Luo, Yu Hu, Yingcheng Li, Jirui Hou, Wanli Kang
Summary: A pH-responsive zwitterionic/anionic surfactant system was proposed to improve crude oil recovery and achieve rapid demulsification of produced fluid. By adjusting the pH value, the interaction between surfactants could be controlled, allowing effective modulation of emulsification and demulsification states. The study demonstrated that varying the molar ratio of EAB to SDS and pH values could significantly impact the stability and droplet size of the emulsion.
Article
Chemistry, Physical
Wanli Kang, Yingqi He, Zhe Li, Hongbin Yang, Zhengqin Ye, Wenming Li, Haizhuang Jiang, Dexin Liu, Hongyu Ding, Sarsenbek Turtabayev
Summary: A novel viscoelastic surfactant system was developed for enhancing foam stability in low-permeability reservoirs. The combination of zwitte-rionic surfactant erucic acid amide propyl hydroxysulfonyl betaine (EHSB) and anionic surfactant sodium dodecyl sulfate (SDS) exhibited better foam stability and interfacial strength compared to the EAB-SDS system. The foam composite index of the optimum formulation 0.3% EHSB-SDS system was six times higher than that of EAB-SDS system with the same viscosity. This newly developed viscoelastic surfactant-enhanced foam has the potential for enhanced oil recovery in low-permeability reservoirs.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Jiaqi Wang, Wanli Kang, Hongbin Yang, Zhe Li, Wenming Li, Zhendong Gao, Jiting Hao, Zhiqi Lv, Zhe Xu
Summary: In this study, hydrophobic polymer microsphere (PM-C16) was synthesized to investigate its salt resistance mechanism. The structure, water absorption kinetics, and physical-mechanical properties of PM-C16 were analyzed, showing that PM-C16 exhibited good viscoelasticity and shear resistance, as well as salt tolerance in high salinity reservoirs.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Yilu Zhao, Lin Zhao, Guodong Chang, Huiqing Chen, Lina Hao, Nan Zhao, Changxi Zhao, Chao Geng, Weili Yang, Zhe Li
Summary: Surfactant-polymer (SP) combined systems, such as the novel SC-XG system developed in this study, have shown promising results for enhancing heavy oil recovery through emulsification and water thickening mechanisms. The addition of xanthan gum (XG) into the anionic surfactant (SC) system significantly reduces the viscosity ratio of oil to displaced water and maintains a high viscosity reduction rate. The emulsion prepared by SC-XG exhibits improved stability and smaller droplet size compared to SC alone, leading to enhanced emulsion stability. Furthermore, sand-pack flooding experiments confirm that the optimal SC-XG system increases heavy oil recovery by 20.20% after brine flooding.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Mechanics
Zhe Li, Yingqi He, Wanli Kang, Hongbin Yang, Bobo Zhou, Haizhuang Jiang, Jiting Hao, Changyuan Ning, Huazheng Wang
Summary: Viscoelastic surfactant (VES) was developed to enhance the stability of foam during foam flooding process. The VES formulation was optimized by investigating foam properties and the oil-water interfacial tension (IFT). The VES strengthened air foams showed excellent anti-gas channeling ability and high oil recovery efficiency in heterogeneous reservoirs.
Article
Energy & Fuels
Zhe Li, Wan-Li Kang, Meng-Lan Li, Hong-Bin Yang, Tong-Yu Zhu, Ying-Qi He, Hai-Zhuang Jiang, Bo -Bo Zhou, Ji-Ting Hao
Summary: In this study, surface-functionalized cellulose nanocrystals (SF-CNCs) were prepared and exhibited higher stability and stronger salt-tolerance than those of corresponding CNC dispersions. Synergistically used with a non-ionic surfactant, the combined flooding system showed strong emulsification stability, low oil-water interfacial tension and the ability to alter the wettability for oil-wetting rocks. The newly formulated nanocellulose/surfactant combined system exhibited a remarkable EOR performance in low-permeability reservoirs.
Article
Mechanics
Bobo Zhou, Hongbin Yang, Xinxin Li, Zhe Li, Sarsenbekuly Bauyrzhan, Wanli Kang, Jingjing Shen, Changyuan Ning, Xiaokeang Y
Summary: pH-responsive wormlike micelles (WLMs) were prepared by noncovalent electrostatic interaction, exhibiting adjustable and reversible properties. The SDS/DETA system showed a transition from weak gel to turbid solution with excellent reversibility by adjusting the pH value.
Article
Chemistry, Physical
Bobo Zhou, Hongbin Yang, Xinxin Li, Zhe Li, Sarsenbekuly Bauyrzhan, Changyuan Ning, Jingjing Shen, Huazheng Wang, Haizhuang Jiang, Wanli Kang
Summary: Introducing supramolecular interactions into polymer systems has recently gained attention as a means to improve their properties. However, the formation of supramolecular polymers through host-guest interactions using two types of polymers is rarely reported. In this study, a novel supramolecular system (ABMN) was prepared by the host-guest inclusion of a beta-cyclodextrin polymer (PAAB) and an adamantane polymer (PAMN). The investigation of ABMN's thickening ability and microstructure showed promising results, indicating its potential as a candidate for enhanced oil recovery in high-temperature and high-salinity reservoirs.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
