Results 21 to 30 of about 47,873 (213)

Critical Role of Light in the Growth and Activity of the Marine N2-Fixing UCYN-A Symbiosis

Frontiers in Microbiology, 2021
The unicellular N2-fixing cyanobacteria UCYN-A live in symbiosis with haptophytes in the Braarudosphaera bigelowii lineage. Maintaining N2-fixing symbioses between two unicellular partners requires tight coordination of multiple biological processes ...
Marine Landa, Kendra A. Turk-Kubo, Francisco M. Cornejo-Castillo, Britt A. Henke, Jonathan P. Zehr   +4 more
doaj   +1 more source

Methanotrophy Alleviates Nitrogen Constraint of Carbon Turnover by Rice Root-Associated Microbiomes

Frontiers in Microbiology, 2022
The bioavailability of nitrogen constrains primary productivity, and ecosystem stoichiometry implies stimulation of N2 fixation in association with carbon sequestration in hotspots such as paddy soils.
Weiwei Cao, Weiwei Cao, Yuanfeng Cai, Zhihua Bao, Zhihua Bao, Shuwei Wang, Xiaoyuan Yan, Zhongjun Jia, Zhongjun Jia   +8 more
doaj   +1 more source

Direct and indirect costs of dinitrogen fixation in Crocosphaera watsonii WH8501 and possible implications for the nitrogen cycle

Frontiers in Microbiology, 2012
The recent detection of heterotrophic nitrogen (N2) fixation in deep waters of the southern Californian and Peruvian OMZ questions our current understanding of marine N2 fixation as a process confined to oligotrophic surface waters of the oceans.
Tobias eGroßkopf, Julie eLaRoche
doaj   +1 more source

Preliminary estimates of the contribution of Arctic nitrogen fixation to the global nitrogen budget

Limnology and Oceanography Letters, 2017
Dinitrogen (N2) fixation is the source of all biologically available nitrogen on earth, and its presence or absence impacts net primary production and global biogeochemical cycles.
Rachel E. Sipler, Donglai Gong, Steven E. Baer, Marta P. Sanderson, Quinn N. Roberts, Margaret R. Mulholland, Deborah A. Bronk   +6 more
doaj   +1 more source

Di-nitrogen fixation at the early and late growth stages of soybean

Acta Scientiarum. Agronomy, 2018
  Soybean derives a significant portion of the required nitrogen (N) from the symbiosis with rhizobia bacteria. However, information on the available genetic variation for N2 fixation capacity in different growth stages of soybean is limited.
Raphael Lemes Hamawaki, Stella K. Kantartzi   +1 more
doaj   +1 more source

Five‐Year Outcomes of Laparoscopic Sphincter‐Preserving Surgery for Rectal Cancer: A Prospective Study in Elderly Vietnamese Patients

Aging and Cancer, EarlyView.
This prospective study demonstrates that laparoscopic sphincter‐preserving surgery is feasible for elderly patients. While overall survival reaches 70% at 5 years, advanced T‐stage and the omission of neoadjuvant therapy significantly drive recurrence, highlighting the need for personalized geriatric protocols despite logistical challenges.
Huu Duc Ho, Quang Le, Ngoc Thach Tran, Van Viet Ung, Loc Vu   +4 more
wiley   +1 more source

Impact of MgO Additions on the Oxidation Resistance and Compression Behavior of Vanadium Alloys

Advanced Engineering Materials, EarlyView.
An increase in oxidation resistance at 600 °C is achieved for alloys containing more than 2.5 wt.% MgO. It has been established that, along with V2O5, MgO6V2, and Mg2O7V2 are formed, which are presumed to enhance oxidative stability. Furthermore, the possible transformation of Mg‐vanadates through reaction with CO2, which presumably occurs in this ...
Ievgen Solodkyi, Mathias Galetz, Georg Hasemann, Fabian Lanoy, Emma White, Manja Krüger   +5 more
wiley   +1 more source

Benthic Dinitrogen Fixation Traversing the Oxygen Minimum Zone Off Mauritania (NW Africa)

Frontiers in Marine Science, 2017
Despite its potential to provide new nitrogen (N) to the environment, knowledge on benthic dinitrogen (N2) fixation remains relatively sparse, and its contribution to the marine N budget is regarded as minor.
Jessica Gier, Carolin R. Löscher, Andrew W. Dale, Stefan Sommer, Ulrike Lomnitz, Tina Treude, Tina Treude   +6 more
doaj   +1 more source

Biomass Native Structure Into Functional Carbon‐Based Catalysts for Fenton‐Like Reactions

Advanced Functional Materials, EarlyView.
This study indicates that eight biomasses with 2D flaky and 1D acicular structures influence surface O types, morphology, defects, N doping, sp2 C, and Co nanoparticles loading in three series of carbon, N‐doped carbon, and cobalt/graphitic carbon. This work identifies how these structural factors impact catalytic pathways, enhancing selective electron
Wenjie Tian, Jingkai Lin, Zhihao Tian, Selusiwe Ncube, Huayang Zhang, Emiliano Cortés, Hongqi Sun, Shaobin Wang   +7 more
wiley   +1 more source

High N2 fixation rates in mycorrhizal tubercles on pine roots

Geoderma
Tuberculate ectomycorrhizae (tubercles) are a type of mycorrhizal association, in which the fungus and root combine to form nodular structures. Diazotrophs associated with these structures could fix atmospheric N2 and contribute to N supply for plants in
Wenyi Xu, Shahid Mahmood, Björn Lindahl, Marie Spohn   +3 more
doaj   +1 more source