Results 21 to 30 of about 77,450 (294)

Natural 15N abundance in two nitrogen saturated forest ecosystems at Solling, Germany

open access: yesJournal of Forest Science, 2003
This research deals with a comparative study of two different N-saturated forests: 1. beech forest and 2. spruce forest at the same locality of \solling, Central Germany.
S.P. Sah, R. Brumme
doaj   +1 more source

The retention dynamics of early-spring N input in a temperate forest ecosystem: Implications for winter N deposition

open access: yesGlobal Ecology and Conservation, 2022
In N-limited temperate regions of China, rates of atmospheric N deposition remain high during winter due to industrial development and energy consumption. Winter-deposited N accumulates and is then released after snowmelt.
Linna Ma   +3 more
doaj   +1 more source

Production of Four 15N-Labelled Cobalamins via Biosynthesis Using Propionibacterium freudenreichii

open access: yesFrontiers in Microbiology, 2021
Cobalamins (vitamin B12) are required by humans for their essential roles as enzyme cofactors in diverse metabolic processes. The four most common cobalamin vitamers are hydroxocobalamin (OHCbl), adenosylcobalamin (AdoCbl), methylcobalamin (MeCbl), and ...
Mengle Wang   +4 more
doaj   +1 more source

Impact of two-bond 15N–15N scalar couplings on 15N transverse relaxation measurements for arginine side chains of proteins [PDF]

open access: yesJournal of Biomolecular NMR, 2018
NMR relaxation of arginine (Arg) 15Nε nuclei is useful for studying side-chain dynamics of proteins. In this work, we studied the impact of two geminal 15N-15N scalar couplings on measurements of transverse relaxation rates (R 2 ) for Arg side-chain 15Nε nuclei.
Dan Nguyen, Junji Iwahara
openaire   +2 more sources

Application of a triple 15N tracing technique to elucidate N transformations in a UK grassland soil [PDF]

open access: yes, 2021
To identify the production and consumption pathways and temporal dynamics of N2O emitted from soil, this study uses 15N labelled substrate-N to quantify the underlying gross N transformation rates using the Ntrace analysis tool and link them to N ...
Ciganda, V. S.   +15 more
core   +1 more source

Evaluation of deep root phenotyping techniques in tube rhizotrons

open access: yesActa Agriculturae Scandinavica. Section B, Soil and Plant Science, 2019
Selection for deep rooting is critical for the development of genotypes that are able to explore deep soil water and nutrients, particularly as agricultural resources become more limited.
Si Chen   +3 more
doaj   +1 more source

Protein restricted diet during gestation and/or lactation in mice affects 15N natural isotopic abundance of organs in the offspring: Effect of diet 15N content and growth. [PDF]

open access: yesPLoS ONE, 2018
OBJECTIVES AND STUDY:This study aimed at measuring the effect in normal to restricted protein diets with specific 15N natural isotopic abundance (NIA) given during gestation and/or lactation on the 15N NIA of fur, liver and muscle in dams and their ...
Karine Bernardo   +7 more
doaj   +1 more source

Response of Two Potato Varieties to Irrigation Methods in the Dry Mediterranean Area

open access: yesAgriculture, 2018
Due to water scarcity and dry Mediterranean conditions, improving water use efficiency is a major challenge for sustainable crop production and environment protection.
Mubarak Ibrahim   +2 more
doaj   +1 more source

Nitrate reductase 15N discrimination in Arabidopsis thaliana, Zea mays, Aspergillus niger, Pichea angusta, and Escherichia coli

open access: yesFrontiers in Plant Science, 2014
Stable 15N isotopes have been used to examine movement of nitrogen (N) through various pools of the global N cycle. A central reaction in the cycle involves nitrate (NO3–) reduction to nitrite (NO2–) catalyzed via nitrate reductase (NR).
Eli eCarlisle   +3 more
doaj   +1 more source

Reduced 15N Losses by Winter and Spring Night-Warming Are Related to Root Distribution of Winter Wheat

open access: yesFrontiers in Plant Science, 2019
To develop efficient N management strategies for high wheat NUE and minimizing the environmental impact of N losses under asymmetric warming, 15N micro-plot experiments were conducted to investigate the effects of night-warming during winter (warming by ...
Chenxi Hu   +8 more
doaj   +1 more source

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