Results 31 to 40 of about 61,889 (286)

Stabilizing Functional Nucleic Acids for Real‐Sample Diagnostics

open access: yesAngewandte Chemie, EarlyView.
Functional nucleic acids enable programmable real‐sample diagnostics, but often lose function in complex biological matrices. This review highlights four stabilization levers—chemical, topological, architectural, and microenvironment/interface engineering—that preserve aptamer and DNAzyme performance in saliva, serum, urine, and stool, reframing ...
Soyeon Lee   +4 more
wiley   +2 more sources

Assessment of agrogenic impact on tea plantation soils by analysis of their enzymatic activity

open access: yesНовые технологии, 2019
Brown forest acidic soils of the humid subtropical zone of Russia, on which tea is mainly cultivated, are largely exposed to agrogenic effects, which reduce their bio-productivity.
L. S. Malyukova, D. V. Strukova
doaj   +1 more source

Electron Bridge Enhanced Charge Polarization Enables Efficient and Ultra‐Long Stable Urea Electrosynthesis

open access: yesAngewandte Chemie, EarlyView.
An electron bridge strategy is developed to regulate charge polarization in Pd1 and Ni1 dual single‐atom sites, promoting CO2 reduction, nitrate reduction, and C–N coupling simultaneously. The resulting catalyst achieves efficient urea electrosynthesis with high activity and record durability over 1700 h.
Fan Wu   +11 more
wiley   +2 more sources

Soil bacteria that precipitate calcium carbonate: mechanism and applications of the process

open access: yesActa Agronómica, 2018
Bacteria with ureasic activity are microorganisms found in soil that in presence of urea and calcium, they can produce calcium carbonate, a process known as microbiologically induced calcium carbonate precipitation (MICP).
Sandra Patricia Chaparro-Acuña   +3 more
doaj   +1 more source

Comprehensive approach to the problem of the effect of residual monomer on the immune-metabolic profile of patients with orthopedic treatment of non-removable temporary constructions

open access: yesPatologìâ, 2019
The purpose of this work was to study the clinical effectiveness of the application of an advanced method of manufacturing temporary structures and its combination with the applications of hyaluronic acid and the internal administration of quercetin ...
O. V. Voznyi   +4 more
doaj   +1 more source

Inactivation of anti-nutrients in soybeans via micronisation

open access: yesResearch in Agricultural Engineering, 2022
The soybean (Glycine max) is used as one of the main protein sources in various animal fodders. However, the presence of anti-nutrients significantly reduces the nutritional value of the bean.
Vladyslav Zubko   +5 more
doaj   +1 more source

Biosynthesis of the Urease Metallocenter [PDF]

open access: yesJournal of Biological Chemistry, 2013
Metalloenzymes often require elaborate metallocenter assembly systems to create functional active sites. The medically important dinuclear nickel enzyme urease provides an excellent model for studying metallocenter assembly. Nickel is inserted into the urease active site in a GTP-dependent process with the assistance of UreD/UreH, UreE, UreF, and UreG.
Mark A, Farrugia   +2 more
openaire   +2 more sources

Design and synthesis of various 1,3,4-oxadiazoles as AChE and LOX enzyme inhibitors

open access: yesHeterocyclic Communications, 2023
N-Substituted-2-propanamide analogues of 1,3,4-oxadiazole have been synthesized using a multi-step synthetic protocol to explore new therapeutic anti-enzymatic agents.
Iqbal Javed   +9 more
doaj   +1 more source

NQS-Doped PDMS Solid Sensor: From Water Matrix to Urine Enzymatic Application

open access: yesBiosensors, 2021
The development of in situ analytical devices has gained outstanding scientific interest. A solid sensing membrane composed of 1,2-naphthoquinone-4-sulfonate (NQS) derivatizing reagent embedded into a polymeric polydimethylsiloxane (PDMS) composite was ...
Adrià Martínez-Aviñó   +5 more
doaj   +1 more source

Sistema de microencapsulação de urease com quitosana - PVA : reatividade e aplicações [PDF]

open access: yes, 1997
Tese (Mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas.Neste trabalho foi investigada a microencapsulação da urease na forma de extrato bruto (EE), através do método de coacervação salina, utilizando-se o ...
Miguez, Maria Jose Brandão
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