Results 31 to 40 of about 13,770 (165)

Archaeal ammonia oxidizers dominate in numbers, but bacteria drive gross nitrification in N-amended grassland soil

Frontiers in Microbiology, 2015
Both ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB) play an important role in nitrification in terrestrial environments. Most often AOA outnumber AOB, but the relative contribution of AOA and AOB to nitrification rates remains ...
Anna E Sterngren, Sara eHallin, Per eBengtson   +2 more
doaj   +1 more source

Organic Matter Regulates Ammonia-Oxidizing Bacterial and Archaeal Communities in the Surface Sediments of Ctenopharyngodon idellus Aquaculture Ponds

Frontiers in Microbiology, 2018
Ammonia-oxidizing bacteria (AOB) and archaea (AOA) play important roles in nitrogen removal in aquaculture ponds, but their distribution and the environmental factors that drive their distribution are largely unknown.
Lili Dai, Lili Dai, Chengqing Liu, Chengqing Liu, Liqin Yu, Chaofeng Song, Liang Peng, Xiaoli Li, Ling Tao, Gu Li   +9 more
doaj   +1 more source

Models for nitrification process design: one or two AOB populations?

Water Science and Technology, 2010
Models for engineering design of nitrifying systems use one ammonia oxidizer biomass (AOB) state variable. A simple extension using two AOB populations allows a more accurate prediction of nitrification systems at switching process environments. These two AOB subpopulations are characterized by two different sets of kinetic parameters.
B, Wett, J A, Jimenez, I, Takács, S, Murthy, J R, Bratby, N C, Holm, S G E, Rönner-Holm   +6 more
openaire   +2 more sources

Ammonia-Oxidizing Archaea and Bacteria Differentially Contribute to Ammonia Oxidation in Sediments from Adjacent Waters of Rushan Bay, China

Frontiers in Microbiology, 2018
Ammonia oxidation plays a significant role in the nitrogen cycle in marine sediments. Ammonia-oxidizing archaea (AOA) and bacteria (AOB) are the key contributors to ammonia oxidation, and their relative contribution to this process is one of the most ...
Hui He, Hui He, Hui He, Yu Zhen, Yu Zhen, Yu Zhen, Tiezhu Mi, Tiezhu Mi, Tiezhu Mi, Lulu Fu, Lulu Fu, Lulu Fu, Zhigang Yu, Zhigang Yu   +13 more
doaj   +1 more source

Tooth size discrepancy in orthodontic patients with skeletal anterior open bite

Clinical and Experimental Dental Research, 2022
Objective To find out if there is any relationship between tooth size discrepancy (TSD) and skeletal anterior open bite (AOB) and to assess the correlation between the amount of AOB and TSD.
Emad F. Al Maaitah, Nada Al‐Madani, Elham S. Abu Alhaija   +2 more
doaj   +1 more source

The contributions of ammonia oxidizing bacteria and archaea to nitrification-dependent N2O emission in alkaline and neutral purple soils

Scientific Reports, 2022
Nitrification is believed to be one of the primary processes of N2O emission in the agroecological system, which is controlled by soil microbes and mainly regulated by soil pH, oxygen content and NH4 + availability.
Lei Hu, Zhixin Dong, Zheng Wang, Liwei Xiao, Bo Zhu   +4 more
doaj   +1 more source

Coagulative Granular Hydrogels with an Enzyme Catalyzed Fibrin Network for Endogenous Tissue Regeneration

Advanced Healthcare Materials, EarlyView.
Coagulative granular hydrogels are composed of packed thrombin‐functionalized microgels that catalyze the conversion of fibrinogen into a secondary fibrin network, filling the interstitial voids. This bio‐inspired approach stabilizes the biomaterial to match the robustness of bulk hydrogels without compromising injectability, mimicking the initial ...
Zhipeng Deng, Camila B. Tovani, Simona Bianco, Gianni Comandini, Aya Elghajiji, Mina Aleemardani, Roxana Moscalu, Jeremie Zappia, Bianca Fernandes, Olivia Annett, Chrissy L. Hammond, Jason Wong, Dave J. Adams, Fabrizio Scarpa, Michael R. Whitehouse, Annela M. Seddon, James P. K. Armstrong   +16 more
wiley   +1 more source

Heterogenous Model of Temozolomide Resistance in Glioblastoma Reveals Phenotypic Shifts in Drug Response and Migratory Potential

Advanced NanoBiomed Research, EarlyView.
Glioblastoma mortality is driven by cell invasion and therapeutic resistance. We report a cancer engineering approach to evaluate the behavior of heterogeneous cohorts of temozolomide resistant and responsive GBM cells. We show the effect of physiologically‐relevant metronomic dosing on ensemble drug response and invasion.
Victoria A. Kriuchkovskaia, Ela K. Eames, Sydney A. McKee, Paul J. Hergenrother, Rebecca B. Riggins, Brendan A. C. Harley   +5 more
wiley   +1 more source

Ammonia transformation by potential consortium in the aquatic system

Scientific Reports
In the present research, the removal of high concentration of ammonia, nitrite and nitrate was determined by using the efficient ammonia-oxidizing bacterial isolates (AOB AMS 1, AOB AMS 2, AOB AMS 5 and AOB AMSS 1) along with the consortium of all four ...
Anne Bhambri, Santosh Kumar Karn, Arun Kumar   +2 more
doaj   +1 more source

Recovering partial nitritation in a PN/A system during mainstream wastewater treatment by reviving AOB activity after thoroughly inhibiting AOB and NOB with free nitrous acid

Environment International, 2020
Starting up or recovering partial nitritation is a major challenge for achieving or maintaining stable partial nitritation/anammox (PN/A) during mainstream wastewater treatment. This study presents a novel strategy for recovering the nitrite pathway by selectively reviving ammonium oxidizing bacteria (AOB) after thoroughly inhibiting AOB and nitrite ...
Bo Wang, Zenghua Wang, Shanyun Wang, Xin Qiao, Xiaofei Gong, Qingteng Gong, Xuefan Liu, Yongzhen Peng   +7 more
openaire   +3 more sources