Results 111 to 120 of about 1,034,709 (313)

The impact of nitrogen deposition on photobiont‐mycobiont balance of epiphytic lichens in subtropical forests of central China

open access: yesEcology and Evolution, 2019
Excessive nitrogen (N) deposition can impact lichen diversity in forest ecosystems, and this is a particular situation in China. Here, we examined the N uptake, assimilation, and the impact of excessive N deposition on the symbiotic balance of dominant ...
Ming Wang, Chuanhua Wang, Raozhen Jia
doaj   +1 more source

Fire protection covering for small diameter missiles [PDF]

open access: yes, 1979
Flexible intumescent protection sheeting of unusually uniform thickness were prepared from epoxy-polysulfide compositions, containing microfibers and the ammonium salt of 1,4-nitroaniline-2-sulfonic acid, as disclosed in U.S. Pat. No.
Riccitiello, S. R., Sawko, P. M.
core   +1 more source

Strategies for Loading and Releasing Peptide Therapeutics in Biodegradable Carriers

open access: yesAdvanced Functional Materials, EarlyView.
A biodegradable carrier‐based peptide delivery system is a powerful treatment platform for diverse diseases, owing to its superior therapeutic efficacy and low toxicity. This review examines the conventional peptide‐loaded carrier fabrication process and its current limitations.
Wookyoung Jang, Ki Wan Bong
wiley   +1 more source

Speckle‐Engineered Upconversion Amplification in Nanoemulsion‐Templated Hydrogel Microdomes

open access: yesAdvanced Functional Materials, EarlyView.
Nanoemulsion‐confined PEGDA microdomes generate speckle‐like excitation fields that strongly amplify upconversion luminescence upon dehydration, enabling filter‐free visible readout with reversible on–off switching. DMD‐based lithography yields scalable, shape‐programmable arrays for moisture‐responsive displays and optical encryption.
Chaeyeong Ryu   +13 more
wiley   +1 more source

Mineralização de nitrogênio e enxofre em solos brasileiros sob influência da calagem e fósforo Nitrogen and sulfur mineralization in brazilian soils under influence of liming and phosphorus

open access: yesPesquisa Agropecuária Brasileira, 1999
O presente estudo, desenvolvido em laboratório no período de outubro de 1995 a janeiro de 1996, objetivou avaliar a influência da calagem e fósforo (P) sobre a mineralização de nitrogênio (N) e enxofre (S) em sete solos, com ampla variabilidade nas ...
Carlos Alberto Silva   +3 more
doaj   +1 more source

Ammonium tris(tetraethylammonium) hexacosaoxidooctamolybdate

open access: yesActa Crystallographica Section E Structure Reports Online, 2008
La estructura del compuesto del título, NH(4)(C(8)H(20)N)(3)[Mo(8)O(26)], está formada por cationes y aniones discretos, con dos unidades de fórmula en la unidad asimétrica. Los aniones de β-octa-molibdato están unidos a los cationes de amonio a través de enlaces de hidrógeno N-H O que involucran grupos óxido terminales y a los cationes de tetra-etil ...
Ikram Zebiri   +4 more
openaire   +3 more sources

Engineering Strategies for Stable and Long‐Life Alkaline Zinc‐Based Flow Batteries

open access: yesAdvanced Functional Materials, EarlyView.
Alkaline zinc‐based flow batteries face persistent challenges from unstable zinc deposition, including dendrite growth, passivation, corrosion, and hydrogen evolution, which severely limit cycling stability. Current research addresses these issues through coordinated electrode structuring, electrolyte regulation, and membrane design to control zinc ...
Yuran Bai   +6 more
wiley   +1 more source

Combined Effects of Drying–Rewetting and Ammonium Addition on Methanotrophs in Agricultural Soil: A Microcosm Study

open access: yesAgriculture
Oxidation of methane by soil microorganisms is an important mechanism controlling the content of this potent greenhouse gas in the atmosphere. Agricultural soils operate under stressful conditions, and ammonium (N-fertilization) and drying (global ...
Irina K. Kravchenko   +3 more
doaj   +1 more source

The Use of Cationic Agents to Increase the Efficiency of Titanium Dioxide in Paper [PDF]

open access: yes, 1966
Handsheets were made with a bleached sulfite pulp, titanium dioxide and cationic agents. The optical properties of these sheets were studied in order to determine and compare the efficiency of the titanium dioxide retained.
Clapp, Richard
core   +1 more source

In‐Situ Solution Complexation for n‐Type Surface‐Energetics Reconstruction in 2.0 eV Ultra‐Wide‐Bandgap Perovskite Solar Cells

open access: yesAdvanced Functional Materials, EarlyView.
A reactive in situ solution complexation strategy reconstructs the surface of 2.0 eV ultra‐wide‐bandgap perovskites via proton transfer. This chemical modulation eliminates metallic defects and induces a degenerate‐like n‐type surface, establishing an Ohmic tunneling contact.
Saemon Yoon   +11 more
wiley   +1 more source

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