Results 21 to 30 of about 1,702 (165)

Small Sample Stress: Probing Oxygen-Deprived Ammonia-Oxidizing Bacteria with Raman Spectroscopy In Vivo

Microorganisms, 2020
The stress response of ammonia-oxidizing bacteria (AOB) to oxygen deprivation limits AOB growth and leads to different nitrification pathways that cause the release of greenhouse gases.
Ann-Kathrin Kniggendorf, Regina Nogueira, Somayeh Nasiri Bahmanabad, Andreas Pommerening-Röser, Bernhard Wilhelm Roth   +4 more
doaj   +1 more source

Evidences towards deciphering the mode of action of dimethylpyrazole-based nitrification inhibitors in soil and pure cultures of Nitrosomonas europaea

Chemical and Biological Technologies in Agriculture, 2022
Background Agriculture relies on the intensive use of synthetic nitrogen (N) fertilizers to maximize crop yields, which has led to the transformation of agricultural soils into high-nitrifying environments.
Adrián Bozal-Leorri, Mario Corrochano-Monsalve, Izargi Vega-Mas, Pedro M. Aparicio-Tejo, Carmen González-Murua, Daniel Marino   +5 more
doaj   +1 more source

Metabolic and Proteomic Responses to Salinity in Synthetic Nitrifying Communities of Nitrosomonas spp. and Nitrobacter spp.

Frontiers in Microbiology, 2018
Typically, nitrification is a two-stage microbial process and is key in wastewater treatment and nutrient recovery from waste streams. Changes in salinity represent a major stress factor that can trigger response mechanisms, impacting the activity and ...
Chiara Ilgrande, Baptiste Leroy, Ruddy Wattiez, Siegfried Elias Vlaeminck, Siegfried Elias Vlaeminck, Nico Boon, Peter Clauwaert   +6 more
doaj   +1 more source

The Isolation of Nitrosomonas europaea in Pure Culture [PDF]

Journal of General Microbiology, 1950
SUMMARY: Nitrosomonas europaea (Winogradsky) was isolated in pure culture from Rothamsted soil. The method used entailed: (1) building up the population of nitrifiers in enrichment cultures; (2) removal of the cells from the chalk in an enriched culture with a stream of carbon dioxide; (3) picking colonies from poured silica gel plates.
openaire   +2 more sources

Identification of bacteria responsible for Nitrification and its correlation with physicochemical properties of water resources. [PDF]

Research Journal of Applied Biotechnology, 2016
In this study, many findings were observed by monitoring seasonal variations of physical, chemical and microbiological characteristics of raw water of seven main canals used by Water Purification Plants in Kafr El-Sheikh governorate; those findings ...
Ibrahim Mousa, Manal Abdel-Rahman
doaj   +1 more source

Inhibition of bacterial ammonia oxidation by organohydrazines in soil microcosms

Frontiers in Microbiology, 2012
Hydroxylamine oxidation by hydroxylamine oxidoreductase (HAO) is a key step for energy-yielding in support of the growth of ammonia-oxidizing bacteria (AOB).
Yucheng eWu, Yun eGuo, Xiangui eLin, Wenhui eZhong, Zhongjun eJia   +4 more
doaj   +1 more source

Cometabolism of 17α-ethynylestradiol by nitrifying bacteria depends on reducing power availability and leads to elevated nitric oxide formation

Environment International, 2021
17α-ethynylestradiol (EE2) is a priority emerging contaminant (EC) in diverse environments that can be cometabolized by ammonia oxidizing bacteria (AOB). However, its transformation kinetics and the underlying molecular mechanism are unclear.
Qi Sheng, Ming Yi, Yujie Men, Huijie Lu
doaj   +1 more source

Optimization of RNA extraction for bacterial whole transcriptome studies of low-biomass samples

iScience, 2022
Summary: We developed a procedure for extracting maximal amounts of high-quality RNA from low-biomass producing (autotrophic) bacteria for experiments where sample volume is limited.
Tom Verbeelen, Rob Van Houdt, Natalie Leys, Ramon Ganigué, Felice Mastroleo   +4 more
doaj   +1 more source

Detecting and diversity analysis of amoA gene from ammonia-oxidizing bacteria in a nitrifying pool(硝化池中氨氧化细菌amoA基因的检测及其多样性研究)

Zhejiang Daxue xuebao. Lixue ban, 2004
为了分析污水处理系统中氨氧化细菌的种群组成，筛选合成了 一对对氨氧化细菌氨单加氧酶基因(amoA) 特异结合的引物序列，利用PCR技术对从活性污泥中抽提的细菌总DNA进行扩增，得到不同重组子的amoA序列片段.运用BLAST程序将测序结果与基因库中的公开序列进行比较，发现在该污水处理系统中分布有大量亚硝化单胞菌属(Nitrosomonas)细菌，其中最主要的是欧洲亚硝化单胞菌(Nitrosomonas europaea)，由此推测Nitrosomonas属细菌在该系统的氨氧化过程中起主导作用.
CHENLing(陈岭), MINGZhen-huan(明镇寰)   +1 more
doaj   +1 more source

Aerobic metabolism of mixed culture of ammonia oxidation

浙江大学学报. 农业与生命科学版, 2000
Denitrification with ammonia as electron donor is a new microbial reaction, named anaerobic ammonia oxidation. The characteristics of mixed culture from an anaerobic ammonia oxidation reactor are compared with those of Nitrosomonas europaea and those of ...
ZHENG Ping, HU Bao-lan, XU Xiang-yang
doaj   +1 more source