Results 51 to 60 of about 77,524 (304)

Cyclic Conversions in the Nitrogen Cycle

Frontiers in Microbiology, 2021
The cyclic nature of specific conversions in the nitrogen cycle imposes strict limitations to the conversions observed in nature and explains for example why anaerobic ammonium oxidation (anammox) bacteria can only use nitrite – and not nitrate – as ...
Robbert Kleerebezem, Sebastian Lücker
doaj   +1 more source

Oxygen‐Tunnel Indium Tin Oxide Vertical Channel Transistors with Enhanced Current Density and Reliability for Monolithic 3D Compute‐In‐Memory Systems

Advanced Functional Materials, EarlyView.
Oxygen‐tunnel (OT) indium tin oxide (ITO) vertical channel transistors (VCTs) enable reliable, high‐density gain‐cell memory for monolithic 3D integration. A sandwiched SiN/SiO2/SiN OT stack selectively regulates oxygen transport, suppressing parasitic electrode oxidation while stabilizing channel oxygen vacancies, thereby suppressing carrier injection
Hyeonho Gu, Haksoon Jung, Yongwoo Lee, Hoichang Jeong, Yanfeng Zhao, Heesoo Yang, Minho Park, Hyeonjin Lee, Seunghun Baek, Minju Song, Junghwan Kim, Youngmin Jo, Hyunjin Park, Munhyeon Kim, Jae‐Joon Kim, Kyuho Jason Lee, Byungjo Kim, Jimin Kwon   +17 more
wiley   +1 more source

A hybrid oxidation approach for converting high-strength urine ammonia into ammonium nitrate

Water Research X
Nutrient resources contained in human urine have great potential to alleviate global agricultural fertilizer demand. Microbial nitrification is a recognized strategy for stabilizing urine ammonia into ammonium nitrate, a common fertilizer worldwide, but ...
Zhiqiang Zuo, Tianyi Zhang, Xin Huang, Xiaotong Cen, Xi Lu, Tao Liu, Ho Kyong Shon, Min Zheng   +7 more
doaj   +1 more source

Receptor‐Free Identification of Toxic Gases Enabled by Hygroscopic Aqueous Salt Films

Advanced Functional Materials, EarlyView.
Water as a gas sensor coating sounds impossible—until it stops evaporating. Here, hygroscopic salt solutions (LiCl, LiBr, H3PO4) form non‐drying aqueous films on CNT chemiresistors under ambient air. Gases partition into these liquid layers, sometimes transforming into water, and generate salt‐specific resistance fingerprints across a four‐channel ...
Seongwoo Lee, Yun‐Tae Kim, Hwarang Choi, Sanghwan Park, Seongyeop Lim, Chang Young Lee   +5 more
wiley   +1 more source

Conversion of coastal marsh to aquaculture ponds altered soil ammonia oxidiser community and decreased ammonia oxidation potential

Journal of Sustainable Agriculture and Environment
Introduction As a crucial component of the nitrogen cycle, ammonia oxidation in soil can be driven by canonical ammonia‐oxidising archaea (AOA) and bacteria, as well as complete ammonia oxidiser (CMX Nitrospira). Land use change can disrupt and alter the
Guiping Ye, Kam W. Tang, Xiao Lin, Ping Yang, Chuan Tong, Zi‐Yang He, Mengmeng Feng, Milin Deng, Yongxin Lin   +8 more
doaj   +1 more source

Facile Preparation of Carbon Membranes Derived from a Fluorenyl‐Containing Polyimine for Selective Hydrogen Separation

Advanced Functional Materials, EarlyView.
A fluorenyl‐containing polyimine is introduced as a simple, scalable precursor for high‐performance carbon membranes. The precursor's intrinsic kinked structure enables defect‐free membrane formation with enhanced hydrogen permeance and excellent ideal selectivities for key industrial gas pairs (H2/N2, H2/CH4, and H2/CO2), offering a practical route ...
Clara Coiana, Christos Pantazidis, Ankita Mandal, Maarten Bransen, Fausto Gallucci, Željko Tomović   +5 more
wiley   +1 more source

Oxidation of Ammonia on Platinum [PDF]

Nature, 1969
WE have investigated the mechanism of ammonia oxidation on platinum using a molecular beam to sample in collision-free conditions the species from the surface for mass-spectroscopic analysis. With controlled molecular flow of the reactants to the surface, it was possible to achieve a molecular flux at the surface equivalent to immersion in a gas at ...
C. W. NUTT, S. KAPUR
openaire   +1 more source

Magnetic‐Field Control of Surface States in CoFe2O4 Thin Films for Nitrate Electroreduction to Ammonia

Advanced Functional Materials, EarlyView.
Magnetic‐field‐assisted CVD of heterometallic single‐source precursors modulates thin‐film surface electronic structure and interfacial charge transfer. Field‐grown (Cobalt ferrite‐1T)CF‐1T films exhibit stabilized electronic states, lower kinetic barriers, and markedly enhanced nitrate‐to‐ammonia electrocatalysis versus (Cobalt ferrite‐0T) CF‐0T ...
Touraj Karimpour, Younes Mousazade, Simon Diel, Shilendra Kumar Sharma, Tisita Das, Nathália C. Verissimo, Thomas Fischer, Ziyaad Aytuna, Andreas Lichtenberg, Sudip Chakraborty, Marcel Risch, Sanjay Mathur   +11 more
wiley   +1 more source

Rapid enrichment and ammonia oxidation performance of ammonia-oxidizing archaea from an urban polluted river of China

, 2019
© 2019 Elsevier Ltd In this study, the optimum growth conditions of AOA in a polluted river were investigated.
Jin, Wenbiao, Wang, Tianqiang, Wang, Qilin, Zhou, Xu, Tu, R, Zhou, X, Tu, Renjie, Wang, Qing, Gao, SH, Jin, W, Han, SF, Han, Song-Fang, Chen, C, Wang, Q, Chen, Chuan, Wang, T, Gao, Shu-Hong, Xie, Guo-Jun, Xie, GJ   +18 more
core   +1 more source

Structural insights into the catalytic mechanism of ammonia monooxygenase

Nature Communications
Ammonia monooxygenase (AMO) oxidizes ammonia to hydroxylamine. Limited knowledge of the structural information of AMO hinders our understanding of the molecular mechanism underlying ammonia oxidation, impacting the mitigation of greenhouse gas emissions ...
Xiaoyun Yang, Zongqiang Li, Tie-Qiang Mao, Chaofu Ma, Guo-Hao Chen, Hong-Po Dong, Sen-Fang Sui   +6 more
doaj   +1 more source