Article
Microbiology
Wei Xiang, Shan Hong, Yanfen Xue, Yanhe Ma
Summary: Rhodococcus sp. strain CH91 has the ability to use long-chain n-alkanes as its sole carbon source and two new genes (alkB1 and alkB2) encoding AlkB-type alkane hydroxylase were identified. The study found that both alkB1 and alkB2 genes are important for the degradation of C16-C36 n-alkanes, with alkB2 playing a more significant role than alkB1.
Article
Geochemistry & Geophysics
Yan Yan, Rong Mu, Xuejiao Qiao, Ke Yu, Luhua Xie, Fan Wang, Bingyan Zhao, Zhaoyu Zhu
Summary: This study analyzed 16S rRNA data from the Junggar Basin in northwest China to investigate the microbial assembly in cold arid deserts. The results showed that precipitation and salinity were the leading predictors of prokaryotic beta diversity in different salinity settings. The study also provided evidence of the relationship between n-alkane proxies and microbial assembly, confirming the importance of precipitation in paleovegetation/precipitation reconstruction in low-salinity dry land settings.
Article
Biotechnology & Applied Microbiology
Valeriya Romanova, Maria Markelova, Eugenia Boulygina, Maria Siniagina, Rudolf Mueller, Tatiana Grigoryeva, Alexander Laikov
Summary: The study isolated the Tsukamurella tyrosinosolvens PS2 strain from petrochemical sludge and found that it possesses two alkane oxidation systems. The expression of different proteins in the strain was compared during growth on sucrose and hexadecane, revealing that hexadecane induces the expression of alkane monooxygenases and other related proteins. This study sheds light on alkane degradation in other members of the Actinobacteria class.
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2022)
Article
Microbiology
Wei Xiang, Ye Liang, Shan Hong, Guan Wang, Jing You, Yanfen Xue, Yanhe Ma
Summary: A novel bacterial strain, CH91, isolated from a high-temperature oil reservoir, showed the potential for degrading a broad range of long-chain n-alkanes and had high thermal tolerance. It could have applications in bioremediation of oil contamination and microbial enhanced oil recovery.
ARCHIVES OF MICROBIOLOGY
(2022)
Article
Microbiology
Jiahua Wang, Yan Zhang, Ying Liu, Zhe Xie, Junwei Cao, Hongcai Zhang, Jie Liu, Tianqiang Bao, Congwen Sun, Bilin Liu, Yuli Wei, Jiasong Fang
Summary: Several reports have shown that n-alkanes are abundant in the hadal zone and could be an important source of nutrients for microorganisms. However, most studies on microbial degradation of hydrocarbons have been conducted only at atmospheric conditions, and little is known about the microbial utilization of n-alkanes in situ in the hadal zone. In this study, a piezotolerant bacterium, strain C2-1, was isolated from Mariana Trench sediment and found to grow with n-alkanes at in situ temperature and pressure.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Chemistry, Physical
Juan Antonio Gonzalez
Summary: Mixtures of cyclic molecules A and n-alkanes were investigated using various thermodynamic parameters. The mixtures exhibited dominant dispersive interactions and the enthalpy values increased with the number of carbon atoms in the n-alkane, indicating weaker A-A interactions with longer n-alkanes. Shorter n-alkanes and bicyclic compounds showed large negative volume values, implying significant structural effects. The disruption of orientational order of longer n-alkanes by A molecules increased the internal energy values. The behavior of different systems was described by the Flory model and DISQUAC using specific parameters. (c) 2023 Elsevier B.V. All rights reserved.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Review
Environmental Sciences
Rajarshi Bhar, Abhisek Mondal, Brajesh K. Dubey, Makarand M. Ghangrekar
Summary: Chlorinated paraffins, a wide range of complex mixtures of chlorinated alkanes, are ubiquitous materials due to their versatile physicochemical properties and wide range of use. This review covers various remediation techniques for CP-contaminated water bodies and soil/sediments, including thermal, photolytic, photocatalytic, nanoscale zero-valent iron (NZVI), microbial, and plant-based methods. Thermal treatment can achieve almost 100% degradation of CPs, but high operational and maintenance costs are required. Photocatalysis and NZVI also show efficient CP removal, while bioremediation and phytoremediation have shown promising results. Further research should focus on analytical techniques, toxicity assessment, and environmental evaluation of different remediation approaches.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Energy & Fuels
Soraya Aminane, Mickael Sicard, Yanis Melliti, Frederic Ser, Lorette Sicard
Summary: The autoxidation of jet fuels below 250 C is a complex phenomenon caused by naturally dissolved oxygen, leading to the formation of different oxidation products. Using n-dodecane as a model fuel, researchers studied the influence of temperature and progress of reactions on autoxidation. By identifying oxidation products and establishing mechanisms, they proposed a new mechanism based on combustion mechanisms and calculated the kinetic constants of the reactions.
Article
Geosciences, Multidisciplinary
Jinzhao Liu, Jiaju Zhao, Ding He, Xianyu Huang, Chong Jiang, Hong Yan, Guanghui Lin, Zhisheng An
Summary: Terrestrial leaf wax n-alkane biomarkers play a significant role in paleoenvironmental reconstruction, but the effects of plant types on their accuracy are important. This review examines the impact of plant types on leaf wax n-alkane biomarkers, including their distribution, hydrogen isotope composition, and carbon isotope composition, and provides examples of cross-calibration in paleo-applications.
EARTH-SCIENCE REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Keisuke Adachi, Shixin Fa, Keisuke Wada, Kenichi Kato, Shunsuke Ohtani, Yuuya Nagata, Shigehisa Akine, Tomoki Ogoshi
Summary: Chirality of host molecules can be adapted and inverted by guest molecules, and in this study, a pillar[5]arene-based macrocyclic host, S-Br, was used to adapt its chirality to the length of n-alkanes. Short n-alkanes favored the pS-form of S-Br, while long n-alkanes favored the pR-form. Temperature also played a role in driving the adaptive chirality of S-Br with n-alkanes.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Applied
Ke Li, Mengxia Yan, Haili Wang, Lifen Cai, Ping Wang, Huimin Chen
Summary: In this study, a series of encapsulated catalysts combining the advantages of S-1's three-dimensional channel structure and potassium are prepared and evaluated. The encapsulated catalyst modified by moderate potassium shows excellent stability and no significant deactivation. The encapsulation structure prevents Pt aggregation, while the topological structure of S-1 reduces channel blockage. Moderate potassium modification inhibits acid sites, improves Pt dispersion and electron density, enhancing the stability of the catalyst.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Agricultural Engineering
Jia Liu, Bo Zhao, Yazheng Lan, Ting Ma
Summary: Microbial consortia, particularly engineered consortia utilizing Acinetobacter venetianus strain RAG-1 and its mutants, show promising potential in degrading various types of crude oil with enhanced efficiency, suggesting their usefulness in microbial biodegradation applications.
BIORESOURCE TECHNOLOGY
(2021)
Article
Multidisciplinary Sciences
Xuechao Li, Kaifeng Niu, Junjie Zhang, Xiaojuan Yu, Haiming Zhang, Yuemin Wang, Qing Guo, Pengdong Wang, Fangsen Li, Zhengming Hao, Chaojie Xu, Yanning Tang, Zhichao Xu, Shuai Lu, Peng Liu, Guigu Xue, Yen Wei, Lifeng Chi
Summary: Selective cascade dehydrogenation of n-alkane molecules under surface constraints can yield monodispersed all-trans conjugated polyenes with unprecedented length controllability, demonstrating potential for diverse functionalities and molecular wiring applications.
NATIONAL SCIENCE REVIEW
(2021)
Article
Energy & Fuels
Du Wang, Zhe Wang, Tianyue Zhang, Yifan Zhai, Ruifeng Hou, Zhen-Yu Tian, Changwei Ji
Summary: This study compares the effects of NH3 blending on the combustion of different alkanes and finds that NH3 has a significant impact on the burning velocity and burned gas length. Larger alkanes are less affected by NH3 blending, while smaller alkanes are more affected. In addition, the energy fraction of NH3 may be a more suitable criterion for practical engineering applications.
Article
Engineering, Environmental
Yuan-Yuan Xu, Feng-Dan Wei, Rui Xu, Tao Cheng, Yan-Ling Ma
Summary: Bacterial metabolism plays a crucial role in the formation and utilization of oil shale. In this study, a potential bacterium capable of degrading long-chain alkane and producing biosurfactant was isolated from shale oil. The findings have significance for the development of oil shale.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Review
Microbiology
Tae Woong Whon, Na-Ri Shin, Joon Yong Kim, Seong Woon Roh
Summary: Recent advances in environmental microbial genomics have improved our understanding of the interactions between microbial communities and their niche in the host gut; integration of various omics data to study the gut microbiome has become increasingly common, although downstream analysis and interpretation of complex omics data remain challenging. Studies have explored gut microbiome characteristics using omics approaches, and recent discussions have focused on analytics programs and advanced techniques for further utilization of omics data.
JOURNAL OF MICROBIOLOGY
(2021)
Article
Microbiology
Tae Woong Whon, Hyun Sik Kim, Na-Ri Shin, Hojun Sung, Min-Soo Kim, Joon Yong Kim, Woorim Kang, Pil Soo Kim, Dong-Wook Hyun, Hoon Je Seong, Woo Jun Sul, Seong Woon Roh, Jin-Woo Bae
Summary: Neonatal calf diarrhea is a major cause of economic loss for cattle producers worldwide, with multifactorial etiology making disease control challenging. The study reveals microbial compositional and functional dysbiosis in the gut of diarrheic calves, potentially contributing to the onset of diarrhea. Additionally, it suggests that prolonged expansion of nontoxigenic Enterobacteriaceae in the gut may play a role in the development of calf diarrhea.
Article
Microbiology
Juseok Kim, Joon Yong Kim, Hye Seon Song, Yeon Bee Kim, Tae Woong Whon, Seung Woo Ahn, Se Hee Lee, SeungRan Yoo, Yu Jin Kim, Jinjong Myoung, Yoon-E Choi, Hong-Seok Son, Seong Woon Roh
Summary: The novel species Anaerocolumna sedimenticola sp. nov. (CBA3638(T)) was isolated from the Geum River sediment in South Korea and belongs to the genus Anaerocolumna. The strain exhibits Gram-stain-positive, anaerobic characteristics with specific cell size and morphology. Detailed information on the genome characteristics and growth conditions of this strain are also provided.
ANTONIE VAN LEEUWENHOEK INTERNATIONAL JOURNAL OF GENERAL AND MOLECULAR MICROBIOLOGY
(2021)
Article
Microbiology
Yeon Bee Kim, Joon Yong Kim, Juseok Kim, Hye Seon Song, Tae Woong Whon, Se Hee Lee, SeungRan Yoo, Jinjong Myoung, Hong-Seok Son, Seong Woon Roh
Summary: This study isolated a novel Gram-positive bacterium, Aminipila terrae, from the sediment of the Geum River, characterized the strain based on physiological, genetic, and genomic analysis, and proposed it as representing a new species within the genus Aminipila.
ARCHIVES OF MICROBIOLOGY
(2021)
Article
Multidisciplinary Sciences
Tae Woong Whon, Seung Woo Ahn, Sungjin Yang, Joon Yong Kim, Yeon Bee Kim, Yujin Kim, Ji-Man Hong, Hojin Jung, Yoon-E Choi, Se Hee Lee, Seong Woon Roh
Summary: ODFM is a data management system that integrates comprehensive genomic information for microorganisms associated with fermented foods. It archives various sequences and provides tools for genetic relatedness measurement and taxonomic analysis. It serves as a valuable resource for evaluating microbial isolates as fermentation starters for food production.
Article
Ecology
Samuel Imisi Awala, Joo-Han Gwak, Yong-Man Kim, So-Jeong Kim, Andrea Strazzulli, Peter F. Dunfield, Hyeokjun Yoon, Geun-Joong Kim, Sung-Keun Rhee
Summary: Short-chain alkanes emitted from geological sources contribute to atmospheric pollution. Microorganisms from acidic geothermal environments can co-metabolize propane with methane, with specific enzymes like PMO3 showing strict substrate specificity for ketones rather than alkanes. Another enzyme, PMO2, may be responsible for the co-metabolic oxidation of propane to 2-propanol in these bacteria.
Correction
Food Science & Technology
Hye Seon Song, Se Hee Lee, Seung Woo Ahn, Joon Yong Kim, Jin-Kyu Rhee, Seong Woon Roh
FOOD RESEARCH INTERNATIONAL
(2022)
Article
Food Science & Technology
Joon Yong Kim, Seong-Eun Park, Eun-Ju Kim, Seung-Ho Seo, Tae Woong Whon, Kwang-Moon Cho, Sun Jae Kwon, Seong Woon Roh, Hong-Seok Son
Summary: This study investigated the succession of microorganisms and changes in metabolites during long-term fermentation of kimchi. The dominant taxa shifted from Leuconostoc and Weissella in the early stages to Latilactobacillus and Levilactobacillus in the middle and late stages. The metabolite analysis showed that about half of the metabolites were produced within the first 15 days of fermentation. These findings highlight the dynamic nature of microbiota and the evolving composition of metabolites during long-term fermentation.
FOOD RESEARCH INTERNATIONAL
(2022)
Article
Food Science & Technology
Namhee Kim, Jieun Lee, Hye Seon Song, Young Joon Oh, Min-Sung Kwon, Misun Yun, Seul Ki Lim, Hyo Kyeong Park, Young Seo Jang, Sulhee Lee, Sang-Pil Choi, Seong Woon Roh, Hak-Jong Choi
Summary: This study found that kimchi can suppress obesity-induced inflammation and exert its effects by changing gut microbiota composition and short-chain fatty acids production.
FOOD RESEARCH INTERNATIONAL
(2022)
Article
Food Science & Technology
Mi-Ja Jung, Juseok Kim, Se Hee Lee, Tae Woong Whon, Hojun Sung, Jin-Woo Bae, Yoon-E Choi, Seong Woon Roh
Summary: This study reveals the ecological role of LAB starters in the fermentation of kimchi and investigates the potential impact of bacteriophages on the fermentation properties of kimchi.
FOOD RESEARCH INTERNATIONAL
(2022)
Article
Multidisciplinary Sciences
Joo-Han Gwak, Samuel Imisi Awala, Ngoc-Loi Nguyen, Woon-Jong Yu, Hae-Young Yang, Martin von Bergen, Nico Jehmlich, K. Dimitri Kits, Alexander Loy, Peter F. Dunfield, Christiane Dahl, Jung-Ho Hyun, Sung-Keun Rhee
Summary: This study reports the isolation of a new aerobic methanotrophic bacterium capable of oxidizing both methane and reduced sulfur compounds for growth. Genomic and proteomic analyses revealed its metabolic pathways for methane and sulfur oxidation. The discovery of this versatile bacterium highlights the intimate interactions of methane and sulfur cycles in the oxic-anoxic interface environments.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Biotechnology & Applied Microbiology
Chang Hee Jeong, Joon Yong Kim, Young Joon Oh, Hye In Ko, Seong Woon Roh, Sung Wook Hong, Hyuk Cheol Kwon, Sung Gu Han, Tae Woon Kim
Summary: This study assessed the safety of white colony-forming yeasts (WCFYs), finding that they did not induce toxic responses in cell and animal experiments, and genomic analysis showed that one of the yeasts did not harbor genes related to toxicity and antimicrobial resistance.
Article
Microbiology
Juseok Kim, Seong Woo Ahn, Joon Yong Kim, Tae Woong Whon, Seul Ki Lim, Byung Hee Ryu, Nam Soo Han, Hak-Jong Choi, Seong Woon Roh, Se Hee Lee
Summary: This study found that the ingestion of lactic acid bacteria can alleviate the ill effects of alcoholic liver disease, including inflammation, liver damage, gut dysbiosis, and abnormal intestinal nutrient metabolism.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Microbiology
Hye Seon Song, Juseok Kim, Yeon Bee Kim, Se Hee Lee, Tae Woong Whon, Seong Woon Roh
Summary: Two novel halophilic archaeal strains were isolated from solar salt in South Korea. Through genetic, physiological, and biochemical analyses, they were found to represent a new genus and species in the family Halobacteriaceae.
JOURNAL OF MICROBIOLOGY
(2022)
Article
Microbiology
Yujin Kim, Yeon Bee Kim, Juseok Kim, Joon Yong Kim, Tae Woong Whon, Won-Hyong Chung, Eun-Ji Song, Young-Do Nam, Se Hee Lee, Seong Woon Roh
Summary: Two novel bacterial strains, CBA3104(T) and CBA3105(T), isolated from kimchi, were identified as a new species of Brachybacterium genus (Brachybacterium kimchii sp. nov.) and a new subspecies of B. halotolerans (B. halotolerans subsp. kimchii subsp. nov.), respectively. These strains showed differences in growth conditions and genetic similarity.
JOURNAL OF MICROBIOLOGY
(2022)
