keyword
https://read.qxmd.com/read/38101553/bacillus-genus-industrial-applications-and-innovation-first-steps-towards-a-circular-bioeconomy
#21
REVIEW
Leonardo Wedderhoff Herrmann, Luiz Alberto Junior Letti, Rafaela de Oliveira Penha, Vanete Thomaz Soccol, Cristine Rodrigues, Carlos Ricardo Soccol
In recent decades, environmental concerns have directed several policies, investments, and production processes. The search for sustainable and eco-friendly strategies is constantly increasing to reduce petrochemical product utilization, fossil fuel pollution, waste generation, and other major ecological impacts. The concepts of circular economy, bioeconomy, and biorefinery are increasingly being applied to solve or reduce those problems, directing us towards a greener future. Within the biotechnology field, the Bacillus genus of bacteria presents extremely versatile microorganisms capable of producing a great variety of products with little to no dependency on petrochemicals...
December 13, 2023: Biotechnology Advances
https://read.qxmd.com/read/38067562/enhancement-of-electricity-production-in-microbial-fuel-cells-using-a-biosurfactant-producing-co-culture
#22
JOURNAL ARTICLE
Carolina Montoya-Vallejo, Jorge Omar Gil Posada, Juan Carlos Quintero-Díaz
Microbial fuel cells are bio-electrochemical devices that enable the conversion of chemical energy into bioelectricity. In this manuscript, the use of biosurfactants (Tween 80 and surfactin) and the effect of coculturing E. coli and L. plantarum were used to investigate the generation of bioelectricity coming from an H-type microbial fuel cell. In this setup, E. coli acts as an electron donor while L. plantarum acts as an in situ biosurfactant producer. It was observed that the use of exogenous surfactants enhanced electricity production compared to conventional E...
November 29, 2023: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://read.qxmd.com/read/38042050/electrochemical-pixels-semi-open-electrochemical-cells-with-a-vertically-stacked-design
#23
JOURNAL ARTICLE
Marc Clua Estivill, Jhonattan F Baez, Pascal Blondeau, Francisco J Andrade
A novel electrochemical cell design in a vertically stacked configuration is presented. Through a layered structure using a top macroporous working electrode, a polyelectrolyte, and a bottom metallic conductor a standalone electrochemical cell with an internal reference electrode is built. This sensor allows monitoring an electrochemical property of an external solution with only one electrode in direct contact with the sample. Using paper-based platinum electrode for the porous top electrode and Nafion as polyelectrolyte material, the self-powered detection of hydrogen peroxide is performed...
November 27, 2023: Biosensors & Bioelectronics
https://read.qxmd.com/read/38036466/lignin-modification-for-enhanced-performance-of-polymer-composites
#24
REVIEW
Muhammad Abu Taher, Xiaolin Wang, K M Faridul Hasan, Mohammad Raza Miah, Jin Zhu, Jing Chen
The biopolymer lignin, which is heterogeneous and abundant, is usually present in plant cell walls and gives them rigidity and strength. As a byproduct of the wood, paper, and pulp manufacturing industry, lignin ranks as the second most prevalent biopolymer worldwide, following cellulose. This review paper explores the extraction, modification, and prospective applications of lignin in various industries, including the enhancement of thermosetting and thermoplastic polymers, biomedical applications such as vanillin production, fuel development, carbon fiber composites, and the creation of nanomaterials for food packaging and drug delivery...
November 30, 2023: ACS Applied Bio Materials
https://read.qxmd.com/read/38025766/advance-of-tolerance-engineering-on-microbes-for-industrial-production
#25
REVIEW
Siyuan Gao, Yang Liao, Hao He, Huiling Yang, Xuewei Yang, Sheng Xu, Xin Wang, Kequan Chen, Pingkai Ouyang
Industrial microbes have become the core of biological manufacturing, which utilized as the cell factory for production of plenty of chemicals, fuels and medicine. However, the challenge that the extreme stress conditions exist in production is unavoidable for cell factory. Consequently, to enhance robustness of the chassis cell lays the foundation for development of bio-manufacturing. Currently, the researches on cell tolerance covered various aspects, involving reshaping regulatory network, cell membrane modification and other stress response...
December 2023: Synthetic and Systems Biotechnology
https://read.qxmd.com/read/38016543/assessment-of-microbial-population-in-integrated-cw-mfc-system-and-investigation-of-organics-and-fecal-coliform-removal-pathway
#26
JOURNAL ARTICLE
Anjishnu Biswas, Saswati Chakraborty
The current study is focused on understanding the operational mechanism of an integrated constructed wetland-microbial fuel cell (CW-MFC) reactor emphasizing fecal coliform (FC) removal. Few studies are available in the literature investigating the inherent mechanisms of pathogen inactivation in a CW-MFC system. Raw domestic wastewater was treated in three vertical reactors, one planted constructed wetland (R1), one planted CW-MFC (R2), and one unplanted CW-MFC (R3). Spatial analysis of treated effluents showed a considerable amount of organics and fecal coliform removal at the vicinity of the anode in R2...
November 26, 2023: Science of the Total Environment
https://read.qxmd.com/read/38007521/investigation-of-microbial-fuel-cell-performance-based-on-the-nickel-thin-film-modified-electrodes
#27
JOURNAL ARTICLE
Fatemeh Mahmoodzadeh, Nahid Navidjouy, Saber Alizadeh, Mostafa Rahimnejad
Microbial fuel cells (MFCs) are a self-sustaining and environmentally friendly system for the simultaneous was tewater treatment and bioelectricity generation. The type and material of the electrode are critical factors that can influence the efficiency of this treatment process. In this study, graphite plates and carbon felt were modified through the electrodeposition of nickel followed by the formation of a biofilm, resulting in conductive bio-anode thin film electrodes with enhanced power generation capacity...
November 25, 2023: Scientific Reports
https://read.qxmd.com/read/37999281/ultrasonic-spray-coating-to-optimize-performance-of-bio-electrochemical-systems
#28
JOURNAL ARTICLE
Giacomo Spisni, Giulia Massaglia, Fabrizio C Pirri, Stefano Bianco, Marzia Quaglio
This work investigates the optimization of carbon-based electrodes employed in bio-electrochemical systems (BES) through the deposition of nanostructured layers of poly(3,4-ethylene-dioxy-thiophene) poly(styrene-sulfonate) (PEDOT:PSS) on commercial carbon paper electrodes via ultrasonic spray coating (USC). This innovative application of USC demonstrated that uniform and controlled depositions of PEDOT:PSS can be successfully performed on carbon-based electrodes. To this end, the morphology and spatial uniformity of depositions were verified via scanning electron microscopy and Raman spectroscopy...
November 10, 2023: Nanomaterials
https://read.qxmd.com/read/37988978/development-of-bioanodes-rich-in-exoelectrogenic-bacteria-using-iron-rich-palaeomarine-sediment-inoculum
#29
JOURNAL ARTICLE
Fatima-Zahra Ait-Itto, James A Behan, Mathieu Martinez, Frédéric Barrière
Microbial Fuel Cells (MFC) convert energy stored in chemicals into electrical energy thanks to exoelectrogenic microorganisms who also play a crucial role in geochemical cycles in their natural environment, including that of iron. In this study, we investigated paleomarine sediments as inoculum for bioanode development in MFCs. These sediments were formed under anoxic conditions ca. 113 million years ago and are rich in clay minerals, organic matter, and iron. The marlstone inoculum was incubated in the anolyte of an MFC using acetate as the added electron donor and ferricyanide as the electron acceptor in the catholyte...
November 19, 2023: Bioelectrochemistry
https://read.qxmd.com/read/37964692/removal-of-phenolic-inhibitors-from-lignocellulose-hydrolysates-using-laccases-for-the-production-of-fuels-and-chemicals
#30
REVIEW
M T Fernández-Sandoval, A García, K V Teymennet-Ramírez, D Y Arenas-Olivares, F Martínez-Morales, M R Trejo-Hernández
Lignocellulose is the most abundant biopolymer in the biosphere. It is inexpensive and therefore considered an attractive feedstock to produce biofuels and other biochemicals. Thermochemical and/or enzymatic pretreatment is used to release fermentable monomeric sugars. However, a variety of inhibitory by-products such as weak acids, furans, and phenolics that inhibit cell growth and fermentation are also released. Phenolic compounds are among the most toxic components in lignocellulosic hydrolysates and slurries derived from lignin decomposition, affecting overall fermentation processes and production yields and productivity...
November 14, 2023: Biotechnology Progress
https://read.qxmd.com/read/37944355/influence-of-shear-stress-on-electroactive-biofilm-characteristics-and-performance-in-microbial-fuel-cells
#31
JOURNAL ARTICLE
Alexiane Godain, Timothy M Vogel, Pascal Fongarland, Naoufel Haddour
This study has provided comprehensive insights into the intricate relationship between shear stress and the development, structure, and functionality of electroactive biofilms in Microbial Fuel Cells (MFCs). A multichannel microfluidic MFC reactors that created specific shear stress on the anode, were designed for the simultaneous study of multiple flow conditions using the same medium. Then, the evolution of the biofilm growth under different shear stress conditions (1, 5 and 10 mPa) were compared. The taxonomic and functional structure was studied by 16S rRNA gene and metagenomic sequencing and the physical biofilm characteristics were measured via fluorescence microscopy...
November 5, 2023: Biosensors & Bioelectronics
https://read.qxmd.com/read/37933234/recent-advances-in-enzymatic-biofuel-cells-enabled-by-innovative-materials-and-techniques
#32
REVIEW
Wengang Huang, Muhammad Yazid Bin Zulkifli, Milton Chai, Rijia Lin, Jingjing Wang, Yuelei Chen, Vicki Chen, Jingwei Hou
The past few decades have seen increasingly rapid advances in the field of sustainable energy technologies. As a new bio- and eco-friendly energy source, enzymatic biofuel cells (EBFCs) have garnered significant research interest due to their capacity to power implantable bioelectronics, portable devices, and biosensors by utilizing biomass as fuel under mild circumstances. Nonetheless, numerous obstacles impeded the commercialization of EBFCs, including their relatively modest power output and poor long-term stability of enzymes...
August 2023: Exploration (Beijing)
https://read.qxmd.com/read/37915992/design-and-construction-of-artificial-biological-systems-for-one-carbon-utilization
#33
REVIEW
Wei Zhong, Hailong Li, Yajie Wang
The third-generation (3G) biorefinery aims to use microbial cell factories or enzymatic systems to synthesize value-added chemicals from one-carbon (C1) sources, such as CO2 , formate, and methanol, fueled by renewable energies like light and electricity. This promising technology represents an important step toward sustainable development, which can help address some of the most pressing environmental challenges faced by modern society. However, to establish processes competitive with the petroleum industry, it is crucial to determine the most viable pathways for C1 utilization and productivity and yield of the target products...
2023: Biodes Res
https://read.qxmd.com/read/37852421/challenges-and-opportunities-for-engineered-escherichia-coli-as-a-pivotal-chassis-toward-versatile-tyrosine-derived-chemicals-production
#34
REVIEW
Sefli Sri Wahyu Effendi, I-Son Ng
Growing concerns over limited fossil resources and associated environmental problems are motivating the development of sustainable processes for the production of high-volume fuels and high-value-added compounds. The shikimate pathway, an imperative pathway in most microorganisms, is branched with tyrosine as the rate-limiting step precursors of valuable aromatic substances. Such occurrence suggests the shikimate pathway as a promising route in developing microbial cell factories with multiple applications in the nutraceutical, pharmaceutical, and chemical industries...
October 16, 2023: Biotechnology Advances
https://read.qxmd.com/read/37804894/new-insights-into-enhancement-of-bio-hydrogen-production-through-encapsulated-microalgae-with-alginate-under-visible-light-irradiation
#35
JOURNAL ARTICLE
Noha Khedr, Khaled N M Elsayed, Ibraheem B M Ibraheem, Fatma Mohamed
The production of green hydrogen is a promising alternative to fossil fuels. The current study focuses on the design of microalgae as a catalyst in bioelectrochemical systems for the generation of biohydrogen. Furthermore, the abovementioned target could be achieved by optimizing different parameters, including strains of microalgae, different optical filters, and their shapes. Synechocystis sp. PAK13 (Ba9), Micractinium sp. YACCYB33 (R4), and Desmodesmus intermedius (Sh42) were used and designed as free cells and immobilized algae for evaluating their performance for hydrogen production...
October 5, 2023: International Journal of Biological Macromolecules
https://read.qxmd.com/read/37783374/macroevolution-differentiation-trees-and-the-growth-of-coding-systems
#36
JOURNAL ARTICLE
Abir U Igamberdiev, Richard Gordon
An open process of evolution of multicellular organisms is based on the rearrangement and growth of the program of differentiation that underlies biological morphogenesis. The maintenance of the final (adult) stable non-equilibrium state (stasis) of a developmental system determines the direction of the evolutionary process. This state is achieved via the sequence of differentiation events representable as differentiation trees. A special type of morphogenetic code, acting as a metacode governing gene expression, may include electromechanical signals appearing as differentiation waves...
September 30, 2023: Bio Systems
https://read.qxmd.com/read/37773568/unlocking-catalytic-potential-exploring-the-impact-of-thermal-treatment-on-enhanced-electrocatalysis-of-nanomaterials
#37
REVIEW
Sakthivel Kogularasu, Yen-Yi Lee, Balasubramanian Sriram, Sea-Fue Wang, Mary George, Guo-Ping Chang-Chien, Jinn-Kong Sheu
In the evolving field of electrocatalysis, thermal treatment of nano-electrocatalysts has become an essential strategy for performance enhancement. This review systematically investigates the impact of various thermal treatments on the catalytic potential of nano-electrocatalysts. The focus encompasses an in-depth analysis of the changes induced in structural, morphological, and compositional properties, as well as alterations in electro-active surface area, surface chemistry, and crystal defects. By providing a comprehensive comparison of commonly used thermal techniques, such as annealing, calcination, sintering, pyrolysis, hydrothermal, and solvothermal methods, this review serves as a scientific guide for selecting the right thermal technique and favorable temperature to tailor the nano-electrocatalysts for optimal electrocatalysis...
September 29, 2023: Angewandte Chemie
https://read.qxmd.com/read/37756260/roots-fuel-cell-produces-and-stores-clean-energy
#38
JOURNAL ARTICLE
Yaniv Shlosberg, Ailun Huang, Tünde N Tóth, Richard B Kaner
In recent years, extensive scientific efforts have been conducted to develop clean bioenergy technologies. A promising approach that has been under development for more than a hundred years is the microbial fuel cell (MFC) which utilizes exoelectrogenic bacteria as an electron source in a bioelectrochemical cell. The viability of bacteria in soil MFCs can be maintained by integrating plant roots, which release organic materials that feed the bacteria. In this work, we show that rather than organic compounds, roots also release redox species that can produce electricity in a biofuel cell...
September 27, 2023: ACS Biomaterials Science & Engineering
https://read.qxmd.com/read/37751664/in-situ-microbial-protein-production-by-using-nitrogen-extracted-from-multifunctional-bio-electrochemical-system
#39
JOURNAL ARTICLE
Qile Zhu, Xiaoyue Li, Zhenchuan Nie, Yiwen Wang, Tianqi Dang, Vagelis G Papadakis, Maria A Goula, Wen Wang, Ziyi Yang
Upgrading of waste nitrogen sources is considered as an important approach to promote sustainable development. In this study, a multifunctional bio-electrochemical system with three chambers was established, innovatively achieving 2.02 g/L in-situ microbial protein (MP) production via hydrogen-oxidizing bacteria (HOB) in the protein chamber (middle chamber), along with over 2.9 L CO2 /(L·d) consumption rate. Also, 69% chemical oxygen demand was degraded by electrogenic bacteria in the anode chamber, resulting in the 394...
September 24, 2023: Journal of Environmental Management
https://read.qxmd.com/read/37750824/surfactant-free-formate-o-2-biofuel-cell-with-electropolymerized-phenothiazine-derivative-modified-enzymatic-bioanode
#40
JOURNAL ARTICLE
Motohiro Kosugi, Ryoichi Tatara, Yuki Fujii, Shinichi Komaba
A formate (HCOO- ) bioanode was developed by utilizing a phenothiazine-based electropolymerized layer deposited on sucrose-derived carbon. The electrode modified with NAD-dependent formate dehydrogenase and the electropolymerized layer synergistically catalyzed the oxidation of the coenzyme (NADH) and fuel (HCOO- ) to achieve efficient electron transfer. Further, the replacement of carbon nanotubes with water-dispersible sucrose-derived carbon used as the electrode base allowed the fabrication of a surfactant-free bioanode delivering a maximum current density of 1...
September 26, 2023: ACS Applied Bio Materials
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