26,363 results match your criteria carbon sources

Conceptual Developments of Aryldiazonium Salts as Modifiers for Gold Colloids and Surfaces.

Langmuir 2021 Jul 22. Epub 2021 Jul 22.

Department of Chemistry, College of Sciences, University of Sharjah, Sharjah 27272, UAE.

Modified colloids and flat surfaces occupy an important place in materials science research due to their widespread applications. Interest in the development of modifiers that adhere strongly to surfaces relates to the need for stability under ambient conditions in many applications. Diazonium salts have evolved as the primary choice for the modification of surfaces. Read More

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Growth Characteristics of Polyporales Mushrooms for the Mycelial Mat Formation.

Mycobiology 2021 26;49(3):280-284. Epub 2021 Apr 26.

Department of Bio and Medical Big Data (BK4 program) and Research Institute of Life Sciences, Gyeongsang National University, Jinju, Republic of Korea.

Mushroom strains of Polyporales from the genera , , , , and were explored in terms of mycelial growth characteristics for the application of mushroom mycelia as alternative sources of materials replacing fossil fuel-based materials. Among the 64 strains of Polyporales, LBS5496GL was selected as the best candidate because it showed fast mycelial growth with high mycelial strength in both the sawdust-based solid medium and the potato dextrose liquid plate medium. Some of the Polyporales in this study have shown good mycelial growth, however, they mostly formed mycelial mat of weak physical strength. Read More

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Geometry calibration and image reconstruction for carbon-nanotube-based multisource and multidetector CT.

Phys Med Biol 2021 Jul 21. Epub 2021 Jul 21.

School of Integrated Technology College of Engineering, Yonsei University, 162-1 Songdo-dong, Yeonsu-gu, Incheon 406-840, KOREA, incheon, Korea (the Republic of).

Conventional intraoperative computed tomography (CT) has a long scan time, degrading the image quality. Its large size limits the position of a surgeon during surgery. Therefore, this study proposes a CT system comprising of eight carbon-nanotube (CNT)-based x-ray sources and 16 detector modules to solve these limitations. Read More

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Ribulose-1,5-bisphosphate carboxylase/oxygenase (RubisCO) is essential for growth of the methanotroph Bath.

Appl Environ Microbiol 2021 Jul 21:AEM0088121. Epub 2021 Jul 21.

National Bioenergy Center, National Renewable Energy Laboratory, Golden, CO, USA.

The ribulose-1,5-bisphosphate carboxylase/oxygenase (RubisCO) enzyme found in plants, algae, and an array of autotrophic bacteria is also encoded by a subset of methanotrophs, but its role in these microbes has largely remained elusive. In this study, we identified that CO was requisite for RubisCO-encoding Bath growth in a bioreactor with continuous influent and effluent gas flow. RNA sequencing identified active transcription of several carboxylating enzymes, including key enzymes of the Calvin and serine cycles, that could mediate CO assimilation during cultivation with both CH and CO as carbon sources. Read More

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Biological activity of bacteria isolated from wetland sediments collected from a conservation unit in the southern region of Brazil.

An Acad Bras Cienc 2021 19;93(3):e20191269. Epub 2021 Jul 19.

Universidade Federal do Rio Grande do Sul, Instituto de Ciências Básicas da Saúde, Departamento de Microbiologia, Imunologia e Parasitologia, Rua Sarmento Leite, 500, sala 216, Cidade Baixa, 90050-170 Porto Alegre, RS, Brazil.

Wetlands are ecosystems rich in biodiversity and their ecological importance is recognized worldwide. Sediment samples were subjected to physical-chemical analysis and organic carbon content varied from 3.0% to 4. Read More

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Confined Chemical Transitions for Direct Extraction of Conductive Cellulose Nanofibers with Graphitized Carbon Shell at Low Temperature and Pressure.

J Am Chem Soc 2021 Jul 21. Epub 2021 Jul 21.

National Engineering Lab for Textile Fiber Materials & Processing Technology, College of Textile Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China.

Cellulose is the most abundant renewable natural polymer on earth, but it does not conduct electricity, which limits its application expansion. The existing methods of making cellulose conductive are combined with another conductive material or high-temperature/high-pressure carbonization of the cellulose itself, while in the traditional method of sulfuric acid hydrolysis to extract nanocellulose, it is usually believed that a too high temperature will destroy cellulose and lead to experimental failure. Now, based on a new research perspective, by controlling the continuous reaction process and isolating oxygen, we directly extracted intrinsically conductive cellulose nanofiber (CNF) from biomass, where the confined range molecular chains of CNF were converted to highly graphitized carbon at only 90 °C and atmospheric pressure, while large-scale twisted graphene films can be synthesized bottom-up from CNFene suspensions, called CNFene (cellulose nanofiber-graphene). Read More

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Contributions of economic growth, terrestrial sinks, and atmospheric transport to the increasing atmospheric CO concentrations over the Korean Peninsula.

Carbon Balance Manag 2021 Jul 20;16(1):22. Epub 2021 Jul 20.

Department of Environmental Planning, Graduate School of Environmental Studies, Seoul National University, Seoul, Republic of Korea.

Background: Understanding a carbon budget from a national perspective is essential for establishing effective plans to reduce atmospheric CO growth. The national characteristics of carbon budgets are reflected in atmospheric CO variations; however, separating regional influences on atmospheric signals is challenging owing to atmospheric CO transport. Therefore, in this study, we examined the characteristics of atmospheric CO variations over South and North Korea during 2000-2016 and unveiled the causes of their regional differences in the increasing rate of atmospheric CO concentrations by utilizing atmospheric transport modeling. Read More

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A Biomedical Knowledge Graph System to Propose Mechanistic Hypotheses for Real-World Environmental Health Observations: Cohort Study and Informatics Application.

JMIR Med Inform 2021 Jul 20;9(7):e26714. Epub 2021 Jul 20.

Renaissance Computing Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States.

Background: Knowledge graphs are a common form of knowledge representation in biomedicine and many other fields. We developed an open biomedical knowledge graph-based system termed Reasoning Over Biomedical Objects linked in Knowledge Oriented Pathways (ROBOKOP). ROBOKOP consists of both a front-end user interface and a back-end knowledge graph. Read More

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Biofuels and biorefineries: Development, application and future perspectives emphasizing the environmental and economic aspects.

J Environ Manage 2021 Jul 16;297:113268. Epub 2021 Jul 16.

Department of Environmental & IT Engineering, Chungnam National University, Daejeon, Republic of Korea. Electronic address:

The fossil fuel utilization adversely affected the environmental health due to the rising emission levels of greenhouse gases. Consequently, the challenges of climate change loaded great stress on renewable energy sources. It is noted that extreme consumption of fossil fuels increased the earth temperature by 1. Read More

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Pan2-Pan3 complex, together with Ccr4-Not complex, has a role in the cell growth on non-fermentable carbon sources.

Biochem Biophys Res Commun 2021 Jul 16;570:125-130. Epub 2021 Jul 16.

Department of Molecular Cell Biology, Graduate School of Comprehensive Human Sciences and Faculty of Medicine, University of Tsukuba, Tsukuba, Japan; Ph.D. Program in Human Biology, School of Integrative and Global Majors, University of Tsukuba, Tsukuba, Japan. Electronic address:

There are two major deadenylase complexes, Ccr4-Not and Pan2-Pan3, which shorten the 3' poly(A) tail of mRNA and are conserved from yeast to human. We have previously shown that the Ccr4-mediated deadenylation plays the important role in gene expression regulation in the yeast stationary phase cell. In order to further understand the role of deadenylases in different growth condition, in this study we investigated the effect of deletion of both deadenylases on the cell in non-fermentable carbon containing media. Read More

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Methoxyeugenol deactivates hepatic stellate cells and attenuates liver fibrosis and inflammation through a PPAR-ɣ and NF-kB mechanism.

J Ethnopharmacol 2021 Jul 16;280:114433. Epub 2021 Jul 16.

School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul PUCRS, Porto Alegre, Rio Grande do Sul, Brazil.

Ethnopharmacological Relevance: Studies have shown interest in nutraceuticals for the prevention of liver diseases. Methoxyeugenol, is a molecule found in foods, such as nutmeg (Myristica fragrans Houtt.) and Brazilian red propolis. Read More

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Nanostructured Inorganic Chalcogenide-Carbon Nanotube Yarn having a High Thermoelectric Power Factor at Low Temperature.

ACS Nano 2021 Jul 19. Epub 2021 Jul 19.

Soft Hybrid Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea.

As power-conversion devices, flexible thermoelectrics that enable conformal contact with heat sources of arbitrary shape are attractive. However, the low performance of flexible thermoelectric materials, which does not exceed those of brittle inorganic counterparts, hampers their practical applications. Herein, we propose inorganic chalcogenide-nanostructured carbon nanotube (CNT) yarns with outstanding power factor at a low temperature using electrochemical deposition. Read More

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Simultaneous anaerobic decolorization/degradation of Reactive Black-5 azo dye and chromium(VI) removal by Bacillus cereus strain MS038EH followed by UV-C/HO post-treatment for detoxification of biotransformed products.

Arch Microbiol 2021 Jul 19. Epub 2021 Jul 19.

Department of Environmental Health Engineering, School of Health, Shahrekord University of Medical Sciences, P.O. Box 8813733435, Shahrekord, Iran.

The existence of synthetic dyes and heavy metals in textile wastewater is a serious problem. These compounds should be removed before discharge into the environment by an appropriate method. The present study was conducted for the characterization of efficient multi-functional strain Bacillus cereus MS038EH for the simultaneous removal of Reactive Black-5 and Chromium(VI). Read More

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Effect of seasonal succession of algal communities on fouling of MF membrane.

J Environ Sci Health A Tox Hazard Subst Environ Eng 2021 Jul 19:1-8. Epub 2021 Jul 19.

National Institute of Ecology, Choongnam, Republic of Korea.

An emerging threat to membrane application is the seasonal proliferation of algae in water sources such as rivers, reservoirs and lakes. This study investigated the link between feed parameters and the membrane performance of a pilot-scale microfiltration (MF) plant for 7 months. The seasonal succession of algae in relation to temperature dynamics was monitored. Read More

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Insights into the molecular composition of semi-volatile aerosols in the summertime central Arctic Ocean using FIGAERO-CIMS.

Environ Sci Atmos 2021 May 15;1(4):161-175. Epub 2021 Mar 15.

Department of Environmental Science, Stockholm University Stockholm Sweden

The remote central Arctic during summertime has a pristine atmosphere with very low aerosol particle concentrations. As the region becomes increasingly ice-free during summer, enhanced ocean-atmosphere fluxes of aerosol particles and precursor gases may therefore have impacts on the climate. However, large knowledge gaps remain regarding the sources and physicochemical properties of aerosols in this region. Read More

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The Proposed Molecular Mechanisms Used by Archaea for Fe(III) Reduction and Fe(II) Oxidation.

Front Microbiol 2021 1;12:690918. Epub 2021 Jul 1.

Department of Biological Sciences and Technology, School of Environmental Studies, China University of Geosciences, Wuhan, China.

Iron (Fe) is the fourth most abundant element in the Earth's crust where ferrous Fe [Fe(II)] and ferric Fe [Fe(III)] can be used by archaea for energy conservation. In these archaea-Fe interactions, Fe(III) serves as terminal electron acceptor for anaerobic respiration by a variety of archaea, while Fe(II) serves as electron donor and/or energy sources for archaeal growth. As no Fe is incorporated into the archaeal cells, these redox reactions are referred to as dissimilatory Fe(III) reduction and Fe(II) oxidation, respectively. Read More

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Lower Funneling Pathways in Species.

Front Microbiol 2021 2;12:630753. Epub 2021 Jul 2.

UNIV Angers, UNIV Brest, Groupe d'Etude des Interactions Hôte-Pathogène (GEIHP), SFR ICAT, Angers, France.

Lignin, a natural polyaromatic macromolecule, represents an essential component of the lignocellulose biomass. Due to its complexity, the natural degradation of this molecule by microorganisms still remains largely misunderstood. Extracellular oxidative degradation is followed by intracellular metabolic degradation of conserved aromatic intermediate compounds (protocatechuate, catechol, hydroxyquinol, and gentisic acid) that are used as carbon and energy sources. Read More

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A novel characteristic of a phytoplankton as a potential source of straight-chain alkanes.

Sci Rep 2021 Jul 19;11(1):14190. Epub 2021 Jul 19.

Phytopetrum Inc., 3A Tamaki House Bldg. 10-17, Akamichi, Uruma, Okinawa, 904-2245, Japan.

Biosynthesis of hydrocarbons is a promising approach for the production of alternative sources of energy because of the emerging need to reduce global consumption of fossil fuels. However, the suitability of biogenic hydrocarbons as fuels is limited because their range of the number of carbon atoms is small, and/or they contain unsaturated carbon bonds. Here, we report that a marine phytoplankton, Dicrateria rotunda, collected from the western Arctic Ocean, can synthesize a series of saturated hydrocarbons (n-alkanes) from CH to CH, which are categorized as petrol (C-C), diesel oils (C-C), and fuel oils (C-C). Read More

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Selective Interface Synthesis of Cobalt Metaphosphate Nanosheet Arrays Motivated by Functionalized Carbon Cloths for Fast and Durable Na/K-Ion Storage.

ACS Appl Mater Interfaces 2021 Jul 19. Epub 2021 Jul 19.

State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu 610065, China.

Exploiting novel nanomaterials with fast and durable sodium/potassium ion storage capability is key to alleviate the application limitations of lithium-ion batteries. Herein, a novel energy storage material based on cobalt metaphosphate nanosheet arrays self-supported on carbon cloths [Co(PO) NSs/CC] is fabricated by a two-step strategy. This rationally designed strategy avoids the preparation of the complex {Co[OP(OBu)]} precursor, which significantly simplifies the synthesis process. Read More

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Valorization of poultry litter using Acutodesmus obliquus and its integrated application for lipids and fertilizer production.

Sci Total Environ 2021 Jul 13;796:149018. Epub 2021 Jul 13.

Institute for Water and Wastewater Technology, Durban University of Technology, PO Box 1334, Durban 4000, South Africa. Electronic address:

Microalgae are recognized as potential candidates for resource recovery from wastewater and projected for biorefinery models. This study was undertaken to evaluate the potential of poultry litter and municipal wastewater as nutrient and water sources, for the cultivation of Acutodesmus obliquus for lipids production for biodiesel application. The efficacy of lipid extracted biomass (LEA) as fertilizer for mung bean crops was also assessed in microcosm. Read More

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Enhanced biomass production through a repeated sequential auto-and heterotrophic culture mode in Chlorella protothecoides.

Bioresour Technol 2021 Jul 11;338:125532. Epub 2021 Jul 11.

Department of Chemical and Biological Engineering, Korea University, 145, Anam-ro, Seoungbuk-gu, Seoul 02841, Republic of Korea. Electronic address:

A repeated sequential auto-and heterotrophic (RSAH) culture mode was designed to enhancebiomass ofChlorella protothecoides. Based on the result that the photosynthesis system may receive damage if the light period is more than 16 h, autotrophy was applied in the 16 h of the light cycle and mixotrophy using acetic acid and glucose in the 8 h of dark cycle. In the dark cycle, an organic carbon source was added according to the Monod equation to maintain activation of the TCA cycle and organic carbon source-to-cell conversion. Read More

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A comparative study of EOF and NMF analysis on downward trend of AOD over China from 2011 to 2019.

Environ Pollut 2021 Jul 7;288:117713. Epub 2021 Jul 7.

School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, Shandong, 250101, China.

In recent decades China has experienced high-level PM pollution and then visible air quality improvement. To understand the air quality change from the perspective of aerosol optical depth (AOD), we adopted two statistical methods of Empirical Orthogonal Functions (EOF) and Non-negative Matrix Factorization (NMF) to AOD retrieved by MODIS over China and surrounding areas. Results showed that EOF and NMF identified the important factors influencing AOD over China from different angles: natural dusts controlled the seasonal variation with contribution of 42. Read More

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Bioenergy consumption, carbon emissions, and agricultural bioeconomic growth: A systematic approach to carbon neutrality in China.

J Environ Manage 2021 Jul 14;296:113242. Epub 2021 Jul 14.

College of Economics and Management, Northwest Agriculture and Forestry University, Yangling, China. Electronic address:

China is the world's largest fossil fuel consumer and carbon emitter country. In September 2020, China pledged to reduce carbon emissions, and achieve carbon neutrality by 2060. Therefore, this study aimed to contribute to the literature and show the pictorial nexus of bioenergy and fossil fuel consumption, carbon emission, and agricultural bioeconomic growth, a new pathway towards carbon neutrality. Read More

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Significantly Raised Visible-Light Photocatalytic H Evolution on a 2D/2D ReS /In ZnS van der Waals Heterostructure.

Small 2021 Jul 16:e2100296. Epub 2021 Jul 16.

School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA, 5005, Australia.

Owing to dwindling fossil fuels reserves, the development of alternative renewable energy sources is globally important. Photocatalytic hydrogen (H ) evolution represents a practical and affordable alternative to convert sunlight into carbon-free H fuel. Recently, 2D/2D van der Waals heterostructures (vdWHs) have attracted significant research attention for photocatalysis. Read More

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Microbial Communities and Interactions of Nitrogen Oxides With Methanogenesis in Diverse Peatlands of the Amazon Basin.

Front Microbiol 2021 29;12:659079. Epub 2021 Jun 29.

School of Life Sciences, Arizona State University, Tempe, AZ, United States.

Tropical peatlands are hotspots of methane (CH) production but present high variation and emission uncertainties in the Amazon region. This is because the controlling factors of methane production in tropical peats are not yet well documented. Although inhibitory effects of nitrogen oxides (NO ) on methanogenic activity are known from pure culture studies, the role of NO in the methane cycling of peatlands remains unexplored. Read More

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Obligate cross-feeding expands the metabolic niche of bacteria.

Nat Ecol Evol 2021 Jul 15. Epub 2021 Jul 15.

Department of Ecology, School of Biology/Chemistry, Osnabrück University, Osnabrück, Germany.

Bacteria frequently engage in obligate metabolic mutualisms with other microorganisms. However, it remains generally unclear how the resulting metabolic dependencies affect the ecological niche space accessible to the whole consortium relative to the niche space available to its constituent individuals. Here we address this issue by systematically cultivating metabolically dependent strains of different bacterial species either individually or as pairwise cocultures in a wide range of carbon sources. Read More

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Growth and autolysis of the kefir yeast Kluyveromyces marxianus in lactate culture.

Sci Rep 2021 Jul 15;11(1):14552. Epub 2021 Jul 15.

Department of Life Sciences, National Chung Hsing University, Taichung, 402, Taiwan.

Kluyveromyces marxianus is a yeast that could be identified from kefir and can use a broad range of substrates, such as glucose and lactate, as carbon sources. The lactate produced in kefir culture can be a substrate for K. marxianus. Read More

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Impact of organic carbon acquisition on growth and functional biomolecule production in diatoms.

Microb Cell Fact 2021 Jul 15;20(1):135. Epub 2021 Jul 15.

Diatom Research Laboratory, Amity Institute of Biotechnology, Amity University, Noida, Uttar Pradesh, India.

Diatoms are unicellular photosynthetic protists which constitute one of the most successful microalgae contributing enormously to global primary productivity and nutrient cycles in marine and freshwater habitats. Though they possess the ability to biosynthesize high value compounds like eicosatetraenoic acid (EPA), fucoxanthin (Fx) and chrysolaminarin (Chrl) the major bottle neck in commercialization is their inability to attain high density growth. However, their unique potential of acquiring diverse carbon sources via varied mechanisms enables them to adapt and grow under phototrophic, mixotrophic as well as heterotrophic modes. Read More

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Occurrence of aerobic denitrifying bacteria in integrated fixed film activated sludge system.

Chemosphere 2021 Jul 9;285:131504. Epub 2021 Jul 9.

Department of Sanitary Engineering, Faculty of Public Health, Mahidol University, Bangkok, 10400, Thailand.

Denitrification can be enhanced in the Integrated Fixed Film Activated System (IFAS) system by integrating media into the anoxic or aerobic zone. The simultaneous nitrification and denitrification (SND) in the biofilm layers has been reported in the aerobic zone of the IFAS system. In this study, two IFAS systems with Bioweb® media installed in the anoxic or aerobic reactor were operated in parallel to evaluate both anoxic denitrification or aerobic SND in the biofilm layers enhanced by fixed film media at three different nitrite and nitrate recirculation (NR) ratios of 75%, 100%, and 125%. Read More

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Biologically removing vanadium(V) from groundwater by agricultural biomass.

J Environ Manage 2021 Jul 12;296:113244. Epub 2021 Jul 12.

Sino-Dutch R&D Centre for Future Wastewater Treatment Technologies, Key Laboratory of Urban Stormwater System and Water Environment, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China. Electronic address:

Vanadium (V) in groundwater can pose a serious threat on both environment and health. Agricultural biomass contains solid carbon source (SCS) and could be attractive for biologically removing V(V). For this purpose, cypress sawdust, corn cob and wheat straw were selected as SCSs to remove vanadate (NaVO). Read More

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