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Archaea 2021 14;2021:8271899. Epub 2021 Dec 14.

State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan 430072, China.

A novel halovirus, VOLN27B, was isolated from a drill core sample taken at a depth of approximately 430 m, from a layer formed during the Cretaceous period (Anhui, China). VOLN27B infects the halophilic archaeon sp. LN27 and has a head-tailed morphotype with a contractile tail, typical of myoviruses. Read More

Archaea 2021 5;2021:9852531. Epub 2021 Nov 5.

Nanjing University, Nanjing, China.

Archaea 2021 5;2021:5510063. Epub 2021 Nov 5.

Cardiff School of Pharmacy and Pharmaceutical Sciences, King Edward VII Avenue, Cardiff University, Cardiff CF10 3NB, UK.

Background: Methane emissions from agriculture are responsible for over 40% of the world's greenhouse gas emissions. In the past, antibiotics were used to control methane production by animals, but concerns over the emergence and spread of antibiotic-resistant bacteria to humans have prompted a search for alternative approaches. Hops are the flowers of the hop plant . Read More

Archaea 2021 9;2021:8817136. Epub 2021 Mar 9.

Department of Chemistry, Pomona College, 645 N. College Ave., Claremont, CA, USA 91711.

NADH-dependent persulfide reductase (Npsr) has been proposed to facilitate dissimilatory sulfur respiration by reducing persulfide or sulfane sulfur-containing substrates to HS. The presence of this gene in the sulfate and thiosulfate-reducing DSM 4304 and other hyperthermophilic appears anomalous, as is unable to respire S and grow in the presence of elemental sulfur. To assess the role of Npsr in the sulfur metabolism of DSM 4304, the Npsr from was characterized. Read More

Archaea 2021 1;2021:8865133. Epub 2021 Mar 1.

Department of Systems Innovation, Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan.

Electromethanogenesis refers to the bioelectrochemical synthesis of methane from CO by biocathodes. In an electromethanogenic system using thermophilic microorganisms, metagenomic analysis along with quantitative real-time polymerase chain reaction and fluorescence hybridization revealed that the biocathode microbiota was dominated by the methanogen sp. strain EMTCatA1 and the actinobacterium sp. Read More

Archaea 2021 9;2021:8894455. Epub 2021 Feb 9.

Department of Civil and Environmental Engineering, DICA, Politecnico di Milano, Environmental Section, Piazza L. da Vinci 32, 20133 Milano, Italy.

The effect of the amount of hydrogen supplied for the biological biogas upgrading was investigated by monitoring the process and evolution of the microbial community. Two parallel reactors, operated at 37°C for 211 days, were continuously fed with sewage sludge at a constant organic loading rate of 1.5 gCOD∙(L∙d) and hydrogen (H). Read More

Archaea 2021 26;2021:8888712. Epub 2021 Jan 26.

Center for Sustainable Development, College of Arts and Sciences, Qatar University, Doha 2713, Qatar.

Microbial production of bioplastics, derived from poly(3-hydroxybutyrate) (PHB), have provided a promising alternative towards plastic pollution. Compared to other extremophiles, halophilic archaea are considered as cell factories for PHB production by using renewable, inexpensive carbon sources, thus decreasing the fermentation cost. This study is aimed at screening 33 halophilic archaea isolated from three enrichment cultures from Tunisian hypersaline lake, Chott El Jerid, using starch as the sole carbon source by Nile Red/Sudan Black staining and further confirmed by PCR amplification of and polymerase genes. Read More

Archaea 2020 18;2020:8811516. Epub 2020 Nov 18.

Institute of Natural Resources and Ecology, HAS, Harbin 150040, China.

The microbial flocculant (MFX) extracted from J1 was used to remove carbamazepine in prepared wastewater and domestic sewage. The influence factors and flocculation mechanism were studied. The optimal carbamazepine removal conditions for MFX were pH of 7-8, 7 mL of flocculant, 0. Read More

Archaea 2020 9;2020:8844811. Epub 2020 Nov 9.

Department of Medical Lab Sciences, College of Applied Medical Sciences, Prince Sattam Bin Abdulaziz University, Wadi ad-Dawasir Campus, Saudi Arabia.

Chitinases or chitinolytic enzymes have different applications in the field of medicine, agriculture, and industry. The present study is aimed at developing an effective hyperchitinase-producing mutant strain of novel . A simple and rapid methodology was used for screening potential chitinolytic microbiota by chemical mutagenesis with ethylmethane sulfonate and irradiation with UV. Read More

Archaea 2020 11;2020:8841490. Epub 2020 Nov 11.

Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, 8 Jiangwangmiao Street, Nanjing 210042, China.

Thermophilic solid-state anaerobic digestion (SS-AD) of agricultural wastes, i.e., corn straw, cattle manure, and vegetable waste, was carried out in this study. Read More

Archaea 2020 26;2020:8894925. Epub 2020 Oct 26.

School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China.

In order to improve the practicality of the rapid biochemical oxygen demand (BOD) method, a highly sensitive rapid detection method for BOD that is based on establishing the correlation between current and dissolved oxygen (DO) was developed. In this experiment, was used as the test microorganism, and the embedding method was used to achieve quantitative fixation of microorganisms, which could increase the content of microorganisms and prolong the service life of the biological element. The conductivity (COND) probe is used as a sensing element, so that the testing value can be read every second. Read More

Archaea 2020 22;2020:8875773. Epub 2020 Oct 22.

Institute of Animal Nutrition and Functional Plant Compounds, Department for Farm Animals and Veterinary Public Health, University of Veterinary Medicine Vienna, 1210 Vienna, Austria.

Rumen archaea play an important role in scavenging ruminal hydrogen (H) and thus facilitate rumen fermentation. They require optimum temperature and osmolality for their growth and metabolism; however, a number of external factors may put archaea under heat and osmotic stress. Betaine is an osmolyte, molecular chaperone, and antioxidant; therefore, it bears potential to combat against these stressors. Read More

Archaea 2020 1;2020:8895321. Epub 2020 Aug 1.

Department of Municipal Engineering, School of Civil Engineering, Hefei University of Technology, Hefei 230009, China.

Anaerobic ceramic membrane bioreactor (AnCMBR) is an attractive alternative for the treatment of high-strength phenol wastewater, but the effects of sludge retention time (SRT) on the performance and membrane fouling are still unclear. The results indicated that the AnCMBR was successfully employed to treat high-strength wastewater containing 5 g phenol L. The removal efficiencies of phenol and chemical oxygen demand (COD) reached over 99. Read More

Archaea 2020 10;2020:8815263. Epub 2020 Jul 10.

Key Laboratory of Efficient Utilization of Low and Medium Grade Energy, MOE, Tianjin University, Tianjin 300350, China.

At present, large-scale and high-efficiency microalgal cultivation is the key to realizing the technology for carbon capture and storage (CCS) and bioresource recovery. Meanwhile, tubular photobioreactors (PBRs) have great potential for microalgal cultivation due to their high productivity. To improve the mixing performance and flashing-light effect, a novel tube PBR with the inner tube tangential to the outer tube was developed, whose radial aeration pores are situated along the length of the inner tube. Read More

Archaea 2020 22;2020:8891543. Epub 2020 Jun 22.

State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.

Heavy metal pollution has been a focus with increasing attention, especially Pb, Cd, and Ni in an aqueous environment. The adsorption capacity and mechanism of extracellular polymeric substances (EPS) from F2 for three heavy metals were investigated in this study. The adsorption efficiency of 94. Read More

Archaea 2020 23;2020:8888615. Epub 2020 Jun 23.

CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.

Responses of a microbial community in the completely autotrophic nitrogen removal over nitrite (CANON) process, which was shocked by a pH of 11.0 for 12 h, were investigated. During the recovery phase, the performance, anaerobic ammonia oxidation (anammox) activity, microbial community, and correlation of bacteria as well as the influencing factors were evaluated synchronously. Read More

Archaea 2020 17;2020:8848120. Epub 2020 Jun 17.

Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.

Rather than direct nutrient removal from wastewaters, an alternative approach aimed at nutrient recovery from aquacultural wastewaters could enable sustainable management for aquaculture production. This study demonstrated the feasibility of cultivating marine macroalgae () with a moving bed bioreactor (MBBR-MA), to remove nitrogen and phosphorus in aquaculture wastewater as well as to produce macroalgae biomass. MBBR-MA significantly increased the simultaneous removal of nitrate and phosphate in comparison with only MBBR, resulting in an average total nitrogen (TN) and total phosphorus (TP) removal efficiency of 42. Read More

Archaea 2020 5;2020:8885662. Epub 2020 Jun 5.

Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China.

The biohydrogen production efficiency and performance of hydrogen-producing acetogen in a four-compartment anaerobic baffled reactor (ABR) were studied by gradually increasing the influent normal molasses wastewater (NMWW) proportion. When the influent NMWW proportion increased to 55%, ABR could develop microbial community with methanogenic function in 63 days and reach a stable operation. When the influent NMWW proportion increased to 80% and reached a stable state, ethanol fermentation was established from butyric acid fermentation in the first three compartments, whereas butyric acid fermentation in the fourth compartment was strengthened. Read More

Archaea 2020 22;2020:9432803. Epub 2020 Jan 22.

Graduate School of Agricultural Science, Tohoku University, Miyagi 989-6711, Japan.

Various support carriers are used for high-density retention of methanogenic archaea in anaerobic wastewater treatment systems. Although the physicochemical properties of carrier materials and microorganisms influence the adhesion of methanogenic archaea, details about the underlying mechanism remain poorly characterized. We applied seven types of chemical surface modifications to carbon felts to clarify the adhesion properties of , a representative thermophilic hydrogenotrophic methanogen. Read More

Archaea 2019 18;2019:5108012. Epub 2019 Nov 18.

CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China.

Seagrass colonization alters sediment physicochemical properties by depositing seagrass fibers and releasing organic carbon and oxygen from the roots. How this seagrass colonization-induced spatial heterogeneity affects archaeal community structure and abundance remains unclear. In this study, we investigated archaeal abundance, diversity, and composition in both vegetated and adjacent bare surface sediments of a meadow. Read More

Archaea 2019 2;2019:1751783. Epub 2019 May 2.

Faculty of Engineering and Natural Sciences, Tampere University, Tampere, Finland.

The inoculum source plays a crucial role in the anaerobic treatment of wastewaters. Lipids are present in various wastewaters and have a high methanogenic potential, but their hydrolysis results in the production of long chain fatty acids (LCFAs) that are inhibitory to anaerobic microorganisms. Screening of inoculum for the anaerobic treatment of LCFA-containing wastewaters has been performed at mesophilic and thermophilic conditions. Read More

Archaea 2019 24;2019:3208051. Epub 2019 Apr 24.

Department of Bioinformatics and Biochemistry, Braunschweig Integrated Centre of Systems Biology (BRICS), Technische Universität Braunschweig, Rebenring 56, 38106 Braunschweig, Germany.

Microorganisms are well adapted to their habitat but are partially sensitive to toxic metabolites or abiotic compounds secreted by other organisms or chemically formed under the respective environmental conditions. Thermoacidophiles are challenged by pyroglutamate, a lactam that is spontaneously formed by cyclization of glutamate under aerobic thermoacidophilic conditions. It is known that growth of the thermoacidophilic crenarchaeon (formerly ) is completely inhibited by pyroglutamate. Read More

Archaea 2019 3;2019:3717239. Epub 2019 Mar 3.

Genomic and Applied Microbiology and Göttingen Genomics Laboratory, Institute of Microbiology and Genetics, University of Göttingen, Göttingen, Germany.

Information on environmental conditions shaping archaeal communities thriving at the seafloor of the central Pacific Ocean is limited. The present study was conducted to investigate the diversity, composition, and function of both entire and potentially active archaeal communities within Pacific deep-sea sediments. For this purpose, sediment samples were taken along the 180° meridian of the central Pacific Ocean. Read More

Archaea 2019 11;2019:9848253. Epub 2019 Feb 11.

Department of Cellular Biotechnologies and Haematology, Sapienza University of Rome, Via Regina Elena 324, 00161 Rome, Italy.

A system is described which permits the efficient synthesis of proteins at high temperature. It is based on the use of an unfractionated cell lysate (S30) from previously well characterized in our laboratory for translation of pretranscribed mRNAs, and now adapted to perform coupled transcription and translation. The essential element in this expression system is a strong promoter derived from the 16S/23S rRNA-encoding gene, from which specific mRNAs may be transcribed with high efficiency. Read More

Archaea 2019 27;2019:6957210. Epub 2019 Jan 27.

Institute of Biological Sciences, Department of Cell Biology, University of Brasilia, 70910-900 Brasília, DF, Brazil.

The Cerrado biome corresponds to an extensive area of Brazil and is considered a biodiversity hotspot. Frequent fires are a natural feature in this biome and have influences on vegetation structure and composition. However, continuous anthropogenic actions are promoting changes in fire frequency and seasonality. Read More

Archaea 2018 19;2018:7571984. Epub 2018 Dec 19.

Department of Physics, Graduate School of Science, Nagoya University, 464-8602 Nagoya, Japan.

Isocitrate dehydrogenase is a catabolic enzyme that acts during the third step of the tricarboxylic acid cycle. The hypothetical protein ST2166 from the archaeon was isolated and crystallized. It shares high primary structure homology with prokaryotic NADP-dependent IDHs, suggesting that these enzymes share a common enzymatic mechanism. Read More

Archaea 2018 18;2018:6973294. Epub 2018 Nov 18.

Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ 85721, USA.

Archaea 2018 8;2018:6201541. Epub 2018 Nov 8.

Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.

Recently, a new oxygenic pathway has been proposed based on the disproportionation of NO with putative NO dismutase (Nod). In addition to a new process in nitrogen cycling, this process provides ecological advantages for the degradation of substrates in anaerobic conditions, which is of great significance for wastewater treatment. However, the Nod distribution in aquatic environments is rarely investigated. Read More

Archaea 2018 16;2018:9319345. Epub 2018 Oct 16.

School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266033, China.

Microorganisms play important roles in the reduction of organic and inorganic pollutants in constructed wetlands used for the treatment of wastewater. However, the diversity and structure of microbial community in constructed wetland system remain poorly known. In this study, the Illumina MiSeq Sequencing of 16S rDNA was used to analyze the bacterial and archaeal microbial community structures of soil and water in a free surface flow constructed wetland, and the differences of bacterial communities and archaeal compositions between soil and water were compared. Read More

Archaea 2018 13;2018:8429145. Epub 2018 Sep 13.

Qingdao University of Technology, Qingdao 266033, China.

An increase in the number of publications in recent years indicates that besides ammonia-oxidizing bacteria (AOB), ammonia-oxidizing archaea (AOA) may play an important role in nitrogen removal from wastewater, gaining wide attention in the wastewater engineering field. This paper reviews the current knowledge on AOA and AOB involved in wastewater treatment systems and summarises the environmental factors affecting AOA and AOB. Current findings reveal that AOA have stronger environmental adaptability compared with AOB under extreme environmental conditions (such as low temperature and low oxygen level). Read More