Article
Infectious Diseases
Nashwah G. M. Attallah, Walaa A. Negm, Engy Elekhnawy, Najla Altwaijry, Elshaymaa I. Elmongy, Thanaa A. El-Masry, Eman A. Alturki, Doaa A. Yousef, Malak Y. Shoukheba
Summary: Frankincense extract demonstrated antibacterial and antibiofilm activity against clinical isolates of Porphyromonas gingivalis, suggesting its potential use as a treatment approach for periodontitis.
Article
Environmental Sciences
Kuppusamy Sathishkumar, Yi Li, Mohamad S. Alsalhi, Balakrishnan Muthukumar, Gajendra Kumar Gaurav, Sandhanasamy Devanesan, Aruliah Rajasekar, Ramalingam Manikandan
Summary: This study investigated the biological denitrification process in the presence of gC(3)N(4) doped TiO2 composite and elucidated the role of extracellular polymeric substances. The results showed that the gC(3)N(4) doped TiO2 composite significantly enhanced nitrate reduction and electron transfer. The integration of gC(3)N(4) doped TiO2 photocatalyst and biofilm is a promising technology for nitrate removal.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Junhui Guo, Guiqin Yang, Zheng Zhuang, Qijun Mai, Li Zhuang
Summary: This study reveals the significant impact of redox potential on EPS of electroactive mixed community biofilms, influencing biocurrent generation, EPS production, and redox properties. Different anode potentials regulate the electroactivity of biofilms through modulating EPS composition and redox properties, providing insights for bioelectrochemical applications.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Biochemistry & Molecular Biology
Jing Li, Shih-Yi Hsiung, Mu-Rong Kao, Xiaohui Xing, Shu-Chieh Chang, Damao Wang, Pei-Yun Hsieh, Pi -Hui Liang, Zaibiao Zhu, Ting -Jen Rachel Cheng, Jiun-Jie Shie, Jing-Ping Liou, D. Wade Abbott, Sung Won Kwon, Yves S. Y. Hsieh
Summary: This study investigated the cell wall structures of Polygonatum odoratum in different plant parts. It was found that the rhizome contains a higher proportion of heteromannans compared to the leaf and stem. The pectic polysaccharides in the rhizome were also structurally more diverse. The 2-linked Araf was specific to the rhizome, indicating a more complex cell wall structure. Additionally, a high proportion of HMs was found in the rhizome cell walls, which induced a specific immune response in mice macrophage cells.
CARBOHYDRATE RESEARCH
(2022)
Review
Green & Sustainable Science & Technology
Kumari Uma Mahto, Vandana Vandana, Monika Priyadarshanee, Devi P. Samantaray, Surajit Das
Summary: The bacterial biofilm and EPS play a crucial role in the removal of toxic pollutants from contaminated environments. Understanding their interaction mechanisms can aid in the development of field-scale applications for pollutant removal.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Environmental
Jun Hu, Yiran Xu, Ying Chen, Jiang Chen, Huiyu Dong, Jianming Yu, Zhimin Qiang, Jiajia Qu, Jianmeng Chen
Summary: The study showed that lead dioxide (PbO2) can oxidize iodide (I-) to form toxic iodinated DBPs in drinking water pipes, while biofilm extracellular polymeric substances (EPS) are important precursors of DBPs formation. The research also found that EPS proteins have a higher potential for organic iodine formation, resulting in higher toxicity of iodinated DBPs.
Review
Biotechnology & Applied Microbiology
Yi Tong Cheah, Derek Juinn Chieh Chan
Summary: This review provides a well-refined analysis protocol on microalgal biofilms and extracellular polymeric substances (EPSs), addressing the pros and cons of various detection techniques and highlighting cutting-edge methods to study biofilm EPSs. It aims to assist novice researchers in making the right choices in their research studies on microalgal biofilms according to available technologies and needs.
JOURNAL OF APPLIED MICROBIOLOGY
(2022)
Article
Environmental Sciences
Ziyi Zhou, Wencheng Ma, Feiyu Li, Dan Zhong, Wenxuan Zhang, Luming Liu, Jingna Zhang, Yisong Zhu, Peng Su
Summary: This study evaluated the combined effects of sulfamethoxazole (SMX) and NaClO in a drinking water distribution system (DWDS) and revealed the mechanisms of antibiotic resistance gene (ARG) proliferation. Results showed that TetM gene was abundant in both the liquid phase and the biofilm, and total organic carbon (TOC) and temperature were significantly correlated with ARGs in the water phase. ARG abundance in the biofilm phase was correlated with extracellular polymeric substances (EPS). Microbial community structure influenced the proliferation and spread of ARGs in the water phase. Antibiotic concentration influenced ARGs by affecting mobile genetic elements (MGEs).
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Sonalin Rath, Krishna Palit, Surajit Das
Summary: This study investigates the impact of varying pH and pCO(2) on the survivability, biofilm formation, and synthesis of extracellular polymeric substances (EPS) in a biofilm-forming marine bacterium. The findings highlight the adaptability of the bacterium to different pH conditions, with the maximum biofilm formation and EPS synthesis observed at pH 6. Understanding the role of EPS in providing structural and functional stability in varying pH conditions is essential for comprehending the future effects of ocean acidification on marine bacteria.
ENVIRONMENTAL RESEARCH
(2022)
Article
Biotechnology & Applied Microbiology
Mitchell T. E. Zak, Vladimiros G. Papangelakis, D. Grant Allen
Summary: In this study, the kinetics and isotherms of lanthanum biosorption by microalgal biofilms and suspensions were evaluated and compared. The impact of extracellular polymeric substances (EPS) on biofilm biosorption was also examined. The results showed similar adsorption kinetics between biofilms and suspensions, with equilibrium reached after approximately 2 to 3 hours. Biofilms adsorbed significantly more lanthanum than suspensions, with a maximum adsorption capacity of 65 mg/g and 25 mg/g respectively. This difference can be attributed to the increased EPS content in biofilms, which had an estimated adsorption capacity of 360 mg/g EPS. The proposed mechanism for EPS adsorption of lanthanum is ion exchange.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2023)
Article
Nanoscience & Nanotechnology
Zhong Li, Jianyuan Zhou, Xinyi Yuan, Yan Xu, Dake Xu, Dawei Zhang, Danqing Feng, Fuhui Wang
Summary: Utilizing biofilms isolated from local environments for corrosion protection of carbon steels in the marine environment has been shown to be an effective strategy. The corrosion inhibitory effect of bacteria was found to be closely related to their biofilmforming abilities, with secreted extracellular polymeric substances playing significant roles in corrosion inhibition. This study proposed a novel, eco-friendly, and cost-effective method for identifying corrosion inhibitory bacteria and protecting carbon steels in marine environments.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Environmental
Mariella Chislett, Jianhua Guo, Philip L. Bond, Zhiguo Yuan
Summary: This study evaluated the chemical interactions and reaction mechanisms between FNA and molecules representative of key EPS in biofilm and sludge flocs, demonstrating that FNA can break down large EPS molecules into smaller ones. Two potential mechanisms have been proposed, including electrophilic substitution and oxidative radical reactions. Larger, more complex organic molecules required higher FNA concentrations for breakdown compared to smaller molecules.
Article
Chemistry, Applied
Joana Pico, Natalia P. Vidal, Listiya Widjaja, Louis Falardeau, Lionel Albino, Mario M. Martinez
Summary: The quantification of alpha-Galacto-oligosaccharides in beans has been approached through different methodologies, but with reported contents showing up to 8-times disparity. This study aimed to optimize and validate the extraction of the most abundant GOS found in beans and comparatively assess their determination by HPAEC/PAD and GC/MS. GC/MS determination was found to be more reliable than HPAEC/PAD, and stachyose was identified as the main GOS component in all samples.
Article
Engineering, Environmental
Lifang Yu, Qiong Zhang, Ren Li, Bingchuang Qiao, Ze Wang, Lanxiang Zheng, Dangcong Peng
Summary: The migration of microbial communities in a synergistic partial denitrification/anammox system was investigated. The anammox process was the dominant nitrogen removal pathway, with an average contribution of 74.31%. Nitrate-reducing bacteria tended to immigrate to anammox biofilms, possibly due to different extracellular polymeric substance (EPS)-mediated mechanisms.
Article
Engineering, Environmental
Xiaofang Yan, Jing Sun, Yizhen Wang, Zisha Zhang, Chuning Zhang, Wei Li, Juan Xu, Xiaohu Dai, Bing-Jie Ni
Summary: The study explored the use of low-dose ferrate (Fe(VI)) for destroying the structure of sewer biofilms, aiming to enhance the efficiency of biofilm control. The results showed that the biofilm structure started to deteriorate at a Fe(VI) dosage of 15 mg Fe(VI)/L and was further damaged with increasing dosage. Fe(VI) treatment mainly reduced the content of humic substances (HS) in biofilm extracellular polymeric substances (EPS), resulting in a looser biofilm structure. XDLVO analysis indicated that the treated biofilm was less likely to aggregate and easier to be removed by shear stress. Combined dosing experiments with Fe(VI) and free nitrous acid (FNA) showed considerable reduction in FNA dosing rate and exposure time, leading to a substantial decrease in cost. The study suggests that low-rate Fe(VI) dosing for biofilm structure destruction is an economical way to facilitate sewer biofilm control.
