Results 131 to 140 of about 99,974 (260)

Ecological, Functional, and Phylogenetic Determinants of Cyanobacterial Biomineralisation

open access: yesEnvironmental Microbiology Reports, Volume 18, Issue 1, February 2026.
Cyanobacteria contribute to the global carbon cycle by biomineralising CO2 into solid carbonates. Unlike photosynthesis, biomineralisation is a less‐understood, multifaceted and adaptive metabolic process with significant global impact. It involves cell wall structures, genetic factors, and metabolic pathways that enable mineral formation and help ...
Federica Tiddia   +3 more
wiley   +1 more source

Relationships Between Soil Phosphorus Fractions and Greenhouse Gas Emissions in Degraded Red and Black Soils Amended With Magnesium Treated Biochar

open access: yesGCB Bioenergy, Volume 18, Issue 2, February 2026.
The use of pristine and Mg‐modified biochar under acidic soils is of great interest. The biochar addition increases the pH of acidic soils and improves the soil health, and side by side increases the availability of nutrients such as phosphorus. Furthermore, the current study also documented that with the addition of biochar, greenhouse gas emission ...
Muhammad Numan Khan   +10 more
wiley   +1 more source

Avaliação do valor nutritivo do bagaço de cana-de-açúcar amonizado com uréia. [PDF]

open access: yes, 2014
Resumo: O trabalho foi desenvolvido objetivando-se avaliar o efeito da adição de uréia em doses crescentes, na presença ou ausência de urease, sobre o valor nutritivo do bagaço de cana-de-açúcar.
CÂNDIDO, M. J. D.   +5 more
core  

Untersuchungen zum Ursprung der Substratspezifität von Enzymen der Amidohydrolase‐Superfamilie

open access: yesAngewandte Chemie, Volume 138, Issue 4, 22 January 2026.
Umfassende Analysen zweier Enzymklassen aus der Amidohydrolase‐Superfamilie (AHS) ergaben, dass die Katalyse über eine 1,4‐ bzw. 1,6‐nukleophile konjugierte Addition abläuft und diese Eigenschaft die Substratspezifität bestimmt. Obwohl alle Substrate und Produkte vollständig achiral sind, führt dieser mechanistische Unterschied zu einer invertierten ...
Lukas Drexler   +3 more
wiley   +1 more source

The place and role of serologic methods in detecting Helicobacter pylori infection [PDF]

open access: yes, 2006
The aim of the study was to determine the place and role of serologic methods in detecting Helicobacter pylori (H. pylori) infection, on the basis of estimated enzyme-linked immunosorbent assay (ELISA) and complement fixation test (CFT) sensitivity and ...
Dominis, Mara   +4 more
core  

Characterization of Helicobacter pylori urease mutants [PDF]

open access: bronze, 1992
E D Segal   +2 more
openalex   +1 more source

On the Origin of Substrate Specificity of Enzymes from the Amidohydrolase Superfamily

open access: yesAngewandte Chemie International Edition, Volume 65, Issue 4, 22 January 2026.
Comprehensive analyses of two enzyme classes from the amidohydrolase superfamily (AHS) revealed that catalysis proceeds either via 1,4 or 1,6 nucleophilic conjugate addition and that this property defines substrate specificity. Moreover, although all substrates and products are entirely achiral, this mechanistic difference results in an inverted ...
Lukas Drexler   +3 more
wiley   +1 more source

Optimasi Amobilisasi Urease Dari Schizzosaccharomyces Pombe Menggunakan Matrik Ca-alginat [PDF]

open access: yes, 2013
Urease immobilization is required to be used in repetition The enzyme hydrolize urea to be ammonia and carbondioxide. Urease was isolated from Schizzosaccharomyces pombe and was purified through precipitation by using ammonium sulphate at 30-45 ...
Maharani, L. D. (Laras)   +2 more
core   +1 more source

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