Results 91 to 100 of about 6,333 (204)

Variation in soil nitrous oxide emission with nitrogen application rates under reclaimed water irrigation

Frontiers in Environmental Science
Nitrous oxide (N2O) is a potent greenhouse gas primarily emitted from agricultural soils through microbial nitrogen transformation processes. Different nitrogen application rates and fertilizer types influence soil nitrogen transformation pathways ...
Yanbing Chi, Chenchen Wei, Peiling Yang
doaj   +1 more source

Archaeal Tetraether Lipids as Tracers for Past Marine Environmental Change

Paleoceanography and Paleoclimatology, Volume 41, Issue 7, July 2026.
Abstract Archaea are single‐celled microorganisms that are abundant in marine environments and play a key role in the carbon and nitrogen cycles. Archaea can biosynthesize a wide variety of isoprenoid membrane lipids, including isoprenoid glycerol dibiphytanyl glycerol tetraethers (isoGDGTs).
Felix J. Elling, Gordon N. Inglis, Nina Davtian, Sarah J. Hurley, B. David A. Naafs, Lauren K. O'Connor, Richard D. Pancost, Francien Peterse, Ronnakrit Rattanasriampaipong, Addison Rice, Florence Schubotz, Jaap S. Sinninghe Damsté, Lars Wörmer, Alexandra Auderset, Kevin W. Becker, Melissa A. Berke, Peter K. Bijl, Cindy De Jonge, Liang Dong, Bella J. Duncan, Tom Dunkley Jones, Pierrick Fenies, Susanne Fietz, Sze Ling Ho, Arnaud Huguet, Carme Huguet, Jérôme Kaiser, Xiao‐Lei Liu, Gesine Mollenhauer, Sebastian Naeher, Ann Pearson, Kasia K. Śliwińska, Appy Sluijs, Claudia Sosa‐Montes de Oca, Qian Tian, Jessica E. Tierney, Devika Varma, Wenjie Xiao, Yi Ge Zhang, Xiaoxiao Zhao   +39 more
wiley   +1 more source

Lifeguard Experience, Confidence, and Learning Preferences Following Airway Management and Oxygen Administration Training

International Journal of First Aid Education
Objective:To evaluate lifeguards' confidence, experience, and learning preferences following training in airway management and oxygen administration (AMOA). The goal was to identify gaps in confidence and experience, as well as preferred training methods.
Connor J O'Keefe, Lydia Wytenbroek, Riley Huntley   +2 more
doaj   +2 more sources

Abundances of archaeal and bacterial amoA genes in the surface sediment samples treated with different temperatures.

, 2014
Data are shown as Means±SD (n = 3). Different uppercase (archaeal amoA gene) and lowercase letters (bacterial amoA gene) refer to significant differences between different temperature treatments ...
Dayong Zhao (588198), Zhongbo Yu (156081), Rui Huang (141490), Qinglong L. Wu (176518), Jin Zeng (196246)   +4 more
core   +1 more source

Neighbor joining consensus tree of bacterial AmoA phylotypes.

, 2014
Colored branches indicate the Nitrosomonas cluster (green) and Nitrosospira cluster (blue). Boot strap values are indicated at nodes. Values in red are cluster designations following the classification of Avrahami et al.
Vidya de Gannes (529416), Gaius Eudoxie (529417), William J. Hickey (218484)   +2 more
core   +1 more source

Purple Sulfur Bacteria Dominate Microbial Community in Brazilian Limestone Cave

Microorganisms, 2019
The mineralogical composition of caves makes the environment ideal for inhabitation by microbes. However, the bacterial diversity in the cave ecosystem remains largely unexplored.
Eric L. S. Marques, João C. T. Dias, Eduardo Gross, Adriana B. de Cerqueira e Silva, Suzana R. de Moura, Rachel P. Rezende   +5 more
doaj   +1 more source

The ammonia monooxygenase structural gene amoA as a functional marker: Molecular fine-scale analysis of natural ammonia-oxidizing populations

, 1997
The naturally occurring genetic heterogeneity of autotrophic ammonia-oxidizing populations belonging to the beta subclass of the Proteobacteria was studied by using a newly developed PCR-based assay targeting a partial stretch of the gene which encodes ...
Witzel, K., Rotthauwe, J., Liesack, W. ; https://orcid.org/   +2 more
core   +2 more sources

Impact of Long-Term Fertilization on Community Structure of Ammonia Oxidizing and Denitrifying Bacteria Based on amoA and nirK Genes in a Rice Paddy from Tai Lake Region, China

Journal of Integrative Agriculture, 2014
Ammonia oxidizing (AOB) and denitrifying bacteria (DNB) play an important role in soil nitrogen transformation in natural and agricultural ecosystems. Effects of long-term fertilization on abundance and community composition of AOB and DNB were studied ...
Zhen-jiang JIN, Lian-qing LI, Xiao-yu LIU, Gen-xing PAN, Hussein Qaiser, Yong-zhuo LIU   +5 more
doaj   +1 more source

Testing the Specificity of Primers to Environmental Ammonia Monooxygenase (amoA) Genes in Groundwater Treated with Urea to Promote Calcite Precipitation [PDF]

, 2006
Bacterial ammonia monooxygenase (amoA) genes in DNA isolated from microorganisms in groundwater were characterized by amplification of amoA DNA using polymerase chain reaction (PCR), Restriction Fragment Length Polymorphism (RFLP) analysis, and ...
Fujita, Y., Reed, D.W., Freeman, S.
core  

Effects of B418 on the yield of continuously cropped rape(Brassica chinensis L.)and on the nitrogen-cycling and carbon-fixation gene cbbL in rhizosphere soils [PDF]

Shandong kexue
To clarify how B418 alleviates the limitations imposed by continuous-cropping obstacle soils on rape production, a plot experiment was conducted to investigate the effects of exogenously applied B418 on the emergence, survival, and yield of rape, as well
WANG Yilian, HU Jindong, HUANG Dingli, XU Weisheng, YANG Hetong, LI Jishun, HE Chunyu
doaj   +1 more source