Results 111 to 120 of about 49,593 (301)

Nitrate reductase and glutamine synthetase activities, nitrate and ammonia assimilation, in the unicellular alga Cyanidium caldarium

open access: yes, 1981
Nitrogen-limited continuous cultures of Cyanidium caldarium contained induced levels of glutamine synthetase and nitrate reductase when either nitrate or ammonia was the sole nitrogen source. Nitrate reductase occurred in a catalytically active form.
Di Martino Rigano V   +3 more
core   +1 more source

Iron-mediated effects on nitrate reductase in marine phytoplankton [PDF]

open access: yes, 1994
The potential activity of nitrate reductase was determined in uni-algal cultures in the laboratory and in natural marine phytoplankton assemblages. In the laboratory bioassays, distinct differences in nitrate reductase activity were observed in iron ...
Stolte, W.   +2 more
core   +1 more source

Lowering salivary pH with sugar‐containing gum augments salivary nitrite production and blood pressure reduction with dietary nitrate (beetroot juice)

open access: yesBritish Journal of Clinical Pharmacology, EarlyView.
Acutely lowering salivary pH (with sugar‐containing acidic gum vs. sugar‐free gum) augments salivary nitrate reduction to nitrite, plasma nitrite concentration, and blood pressure lowering with dietary nitrate. Modifying salivary pH reveals a mechanism by which the nitrate‐nitrite‐NO pathway may be upregulated/inhibited, with potential for other ...
Andrew J. Webb   +7 more
wiley   +1 more source

Harnessing ferroptosis from multilayer defense networks to nanoplatforms for specific cancer therapy

open access: yesBMEMat, EarlyView.
Nanomaterials target metabolically‐regulated ferroptosis for cancer therapy. Iron‐based or alternative nanoplatforms integrate ferroptosis with chemotherapy, immunotherapy, or radiotherapy. They enable stimulus‐responsive therapies (photothermal, photodynamic, sonodynamic) activated by near‐infrared, light, or ultrasound, achieving potent synergistic ...
Xinyue Xu   +5 more
wiley   +1 more source

Impacts of elevated CO2 concentration on biochemical composition, carbonic anhydrase, and nitrate reductase activity of freshwater green algae

open access: yes, 2005
To investigate the biochemical response of freshwater green algae to elevated CO2 concentrations, Chlorella pyrenoidosa Chick and Chlamydomonas reinhardtii Dang cells were cultured at different CO2 concentrations within the range 3-186 μ mol/L and the ...
Xia, JR   +2 more
core  

Enhanced strategies for cuproptosis‐like death in bacterial infection treatment

open access: yesBMEMat, EarlyView.
This review summarizes and examines the molecular mechanisms underlying cuproptosis‐like death. Furthermore, multi‐strategy efficacy enhancement and potential enhancement approaches are analyzed. Abstract Copper, a classical antibacterial metal, has long been of interest and widely used in medical and public health applications.
Wenqi Wang   +7 more
wiley   +1 more source

A narrow bandgap Schottky heterojunction Fe2N/CeO2 microneedle triggering sonodynamic reactive oxygen species storm for drug‐resistance‐free skin fungal infection

open access: yesBMEMat, EarlyView.
Inorganic sonosensitizers suffer from inefficient electron‐hole separation, rapid recombination, and wide bandgaps in anti‐fungal applications. We propose MN@Fe2N/CeO2 to directly eliminate fungi without drug resistance. Combining semiconductor CeO2's advantages with Fe2N's high work function and activity enables efficient Schottky heterojunctions ...
Li Wang   +13 more
wiley   +1 more source

Nitrate reductase in apple trees

open access: yes, 1989
Factors affecting the in vivo nitrate reductase assay were investigated in order to optimize the assay conditions for various tissues of MM 106 apple trees.
Lee, Hee Jae
core  

The Role of Iron‐Hyponitrite Intermediates in Biology and Insights From Synthetic Model Complexes

open access: yesChemistry – A European Journal, EarlyView.
Despite the difference in active site architecture, NO reduction by different NOR enzymes is expected to be linked by a common intermediate: hyponitrite (N2O22−). However, experimentally, very little is known about the coordination chemistry of iron with hyponitrite and the expected Fe‐hyponitrite intermediates.
Michael O. Lengel, Nicolai Lehnert
wiley   +1 more source

Interrelationships of Nitrate Uptake, Nitrate Reductase, and Nitrogen Use Efficiency in Selected Kentucky Bluegrass Cultivars

open access: yes, 1998
The efficiency of nitrate use by turfgrasses is likely related to its efficiency of absorption by roots and its rate of metabolism in roots and shoots.
Hull, R. J.   +3 more
core   +1 more source

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