Results 21 to 30 of about 149,407 (284)

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

Analysis of the urinary glucose-[15N, 15N]-ureide content in the study of the lactose-[15N, 15N]-ureide metabolism in healthy humans [PDF]

open access: yesEuropean Journal of Clinical Nutrition, 2011
Lactose-[15N, 15N]-ureide is used to study the fate of the colonic urea-nitrogen metabolism. During the passage through the gastrointestinal tract, lactose ureide is hydrolysed to glucose ureide, which is absorbed to a limited extent from the small intestine and is excreted urinarily. In the present study, a procedure has been developed to quantify the
V De Preter   +4 more
openaire   +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

Differences in the trophic ecology of micronekton driven by diel vertical migration. [PDF]

open access: yes, 2019
Many species of micronekton perform diel vertical migrations (DVMs), which ultimately contributes to carbon export to the deep sea. However, not all micronekton species perform DVM, and the nonmigrators, which are often understudied, have different ...
Angel M. V.   +6 more
core   +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

Tracking Animal-Dispersed Seedlings Using 15N Xylem Injection Method

open access: yesFrontiers in Plant Science, 2021
Although various seed-marking methods have been developed for seed dispersal, it remains difficult to track the actual patterns of seed dispersal and seedling recruitment. Thus, new labeling methods that accurately track seedling establishment along with
Minghui Wang   +3 more
doaj   +1 more source

Aproveitamento pelo trigo do nitrogênio residual da crotalária (Crotalaria juncea) e da uréia aplicado ao solo em cultivo precedente Recovery by wheat of residual nitrogen from crotalária (Crotalaria juncea) and urea of previous crop soil fertilization

open access: yesCiência Rural, 2009
O cultivo de adubos verdes no sistema produtivo tem por objetivo o fornecimento de nitrogênio ao solo. Porém, muitas vezes os benefícios não são a curto prazo.
Anderson Lange   +3 more
doaj   +1 more source

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