Results 81 to 90 of about 170,686 (314)

Global patterns of marine nitrogen fixation and denitrification [PDF]

, 1997
A new quasi-conservative tracer N*, defined as a linear combination of nitrate and phosphate, is proposed to investigate the distribution of nitrogen fixation and denitrification in the world oceans. Spatial patterns of N* are determined in the different
Nicolas Gruber, Jorge L. Sarmiento, Sarmiento, Jorge L., Gruber, Nicolas   +3 more
core   +1 more source

Spatial and seasonal variations of Cyanobacteria and their nitrogen fixation rates in Sanya Bay, South China Sea

Scientia Marina, 2008
The nitrogen fixation rates of planktonic and intertidal benthic cyanobacteria were investigated in Sanya Bay from 2003 to 2005. Trichodesmium thiebautii was the dominant species of planktonic cyanobacteria during our study.
Junde Dong, Yanying Zhang, Youshao Wang, Si Zhang, Hankui Wang   +4 more
doaj   +1 more source

Copolymers of Poly(Butylene Trans‐1,4‐Cyclohexanedicarboxylate)/Pripol as New Biomaterial Platform for Small Diameter Vascular Graft

Advanced Healthcare Materials, EarlyView.
Electrospun tubular scaffolds from novel PBCE‐based copolyesters and blends were designed as candidates for small‐diameter vascular grafts. They combine defect‐free architecture, blood‐compatible surfaces, and mechanical properties comparable to native vessels.
Edoardo Bondi, Gabriele Obino, Giulia Guidotti, Alberto Sensini, Martijn van Griensven, Antonio Junior Lepedda, Nadia Lotti, Lorenzo Moroni   +7 more
wiley   +1 more source

Nitrogen Fixation and Translocation in Sugarcane

, 2008
World sugarcane production is increasing rapidly as a biofuel. In some areas in Brazil, sugarcane has been grown continually over very long periods without N fertiliser inputs. Therefore, the occurrence of N fixation has been suspected.
Kuni Sueyoshi, Takashi Sato, Takuji Ohyama, Yasuhiro Nakanishi, Atsushi Momose, Norikuni Ohtake, Shoichiro Akao   +6 more
core  

Plasma‐water‐based nitrogen fixation: Status, mechanisms, and opportunities

, 2022
Nitrogen-based crop fertilizers are the most important industrial chemicals supporting the global food supply. Plasma-water-based nitrogen fixation (PWBNF) provides a clean, sustainable, and flexible alternative, which is amenable for decentralized ...
Liu, Dawei, Lu, Xinpei, Dawei Liu, Huang, Zhongzheng, Kostya (Ken) Ostrikov, Zhongzheng Huang, Ao Xiao, Xiao, Ao, Ostrikov, Kostya Ken, Xinpei Lu   +9 more
core   +1 more source

Physicochemical Reinforcement Unlocks Sterilization‐Stable Anisotropic Hydrogels for Cell‐Compatible Mock Arteries

Advanced Healthcare Materials, EarlyView.
ABSTRACT In vitro arterial models offer ethical and robust alternatives for vascular research but require cytocompatible materials that replicate physiological mechanics. Poly(vinyl alcohol) (PVA) hydrogels produced by directional freezing and salting‐out (PVA DFSO) are anisotropic yet lack stability for cell culture. Herein, methacrylated PVA (PVA‐MA)
Javiera Sanhueza Ortega, Kirthen Shanmuganathan, Laura Poole‐Warren, Susann Beier, Ulises Aregueta Robles   +4 more
wiley   +1 more source

Effect of combined nitrogen on symbiotic nitrogen fixation in pea plants

, 1979
The nitrogen-fixing activity of the symbiotic system of Pisum sativum with Rhizobium leguminosarum is adversely affected by combined nitrogen. Both ammonium chloride and potassium nitrate, when added to the roots, lower the nitrogenase activity ...
Houwaard, F.
core  

Tracking Spatiotemporal Extracellular Matrix Evolution and Tissue Fusion in 3D Microtissues via Click Chemistry‐Based Metabolic Labelling

Advanced Healthcare Materials, EarlyView.
Metabolic labeling of nascent proteins in 3D microtissue spheroids provides a powerful analytical approach for large‐scale tissue engineering. Incorporation of non‐canonical amino acids with fluorescent tagging enables spatiotemporal investigation of extracellular matrix deposition and its evolution during multicellular tissue development and fusion ...
Theresa Koenig, F. Max Yavitt, Laura Veenendaal, Tim B. F. Woodfield   +3 more
wiley   +1 more source

Mixed‐Metal Promotion in a Manganese‐Molybdenum Oxynitride as Catalyst to Integrate C─C and C─N Coupling Reactions for the Direct Synthesis of Acetonitrile from Syngas and Ammonia

Advanced Materials, EarlyView.
Transition metal oxy/carbo‐nitrides show great promise as catalysts for sustainable processes. A Mn‐Mo mixed‐metal oxynitride attains remarkable performance for the direct synthesis of acetonitrile, an important commodity chemical, via sequential C─N and C─C coupling from syngas (C1) and ammonia (N1) feedstocks.
M. Elena Martínez‐Monje, Wilson Henao, Tania Rodenas, Patricia Concepción, Virginia Pérez Dieste, Alexander Missyul, Giovanni Agostini, Gonzalo Prieto   +7 more
wiley   +1 more source

Symbiotic nitrogen fixation Chapter 10

, 1965
Chapters 1 and 16 describe the origin of the nitrogen cycle, the distribution of nitrogen in the biosphere, and the processes, including fixation,that maintain equilibrium between molecular and combined nitrogen.
Nutman, P. S.
core