Results 11 to 20 of about 6,296 (209)

In Situ Observation of Polyoxometalate Formation by Vibrational Spectroscopy. [PDF]

open access: yesChemistry
In‐situ IR and Raman spectroscopy were employed to observe the formation of polyoxometalates (POMs) in aqueous solution. Thereby key intermediates were identified, and better understanding of POM formation enabled the development of an improved method for the synthesis of vanadium‐substituted phosphomolybdates, which are important catalysts for ...
Krueger JH   +5 more
europepmc   +2 more sources

Distinct Phage-Encoded Enzymes for Substitution of Deoxythymidine by Deoxyuridine in Phage Genomes. [PDF]

open access: yesAdv Sci (Weinh)
Distinct enzymes including dCTP deaminases (Dcds), dTMP phosphatases (Dtms), and dTTP pyrophosphatases (Dtt) are found to be responsible for dU‐DNA biosynthesis in the phages PBS1, DSS3_VP1, and PhiR1‐37. Both PhiR1‐37‐derived and synthetic dU‐DNA are resistant to cleavage by restriction enzymes and Cas12a nuclease targeting dT‐containing sites.
Li Y   +7 more
europepmc   +2 more sources

Synthesis and Characterization of Immobilized Polyoxophosphomolybdate on the Surface of Magnetic Nanoparticles as Recoverable and Efficient New Catalyst for Epoxidation of Olefins [PDF]

open access: yesشیمی کاربردی روز, 2018
New nanocatalyst Fe3O4@MnPOM, was successfully synthesized by covalent bonding of polyoxomolybdate [PMnMo11O39]5‒ on the amino-functionalized Fe3O4@SiO2. The synthesized nanomaterials were characterized by a series of spectroscopic techniques including X-
Zeinab Moradi-Shoeili   +3 more
doaj   +1 more source

UJI AKTIVITAS ANTIOKSIDAN EKSTRAK ETANOL HERBA PEGAGAN (Centella asiatica (L.) Urb) DENGAN METODE FOSFOMOLIBDAT

open access: yesPharmaciana, 2014
Antioxidant compound extends widely used to prevent degenerative disease. Centella asiatica (L.) Urb or known as pegagan is a plant which grown in Indonesia and it’s leaves contain some compounds reported to have antioxidant activities.
Nina Salamah, Liani Farahana
doaj   +1 more source

Microporous ammonium phosphomolybdate as a catalyst for oxidative degradation of tetracycline under ambient condition: Reaction mechanisms and pathways

open access: yesCatalysis Communications, 2023
Microporous ammonium phosphomolybdate (APM) as a catalyst is used to degrade tetracycline (TC) antibiotics under ambient conditions. APM is prepared and characterized.
Debasish Pal, Tarasankar Pal, Anjali Pal
doaj   +1 more source

Changes in foliar nutrient content and resorption in Fraxinus excelsior L., Ulmus minor Mill. and Clematis vitalba L. after prevention of floods [PDF]

open access: yes, 1999
This paper focuses on the impact of flood on tree mineral nutrition through measurement of resorption (i.e. transfer of nutrients from leaves to perennial organs).
Sanchez-Pérez, José-Miguel   +3 more
core   +2 more sources

Applications of potentiometric sensors for the determination of malachite green dye in real samples

open access: yesSensors International, 2022
Developing more accurate, fast and cheap means of analysing chemical species is everlasting. Towards this objective, two new electrodes for the determination of malachite green dye (MG) are devised: one incorporating an ion-pair in polyvinyl chloride ...
Khalid I. Abed Almonem   +2 more
doaj   +1 more source

Influence of hydroxyethyl starch (6% HES 130/0.4) administration on hematology and clinical chemistry parameters [PDF]

open access: yes, 2008
Background: The chemical inertness of hydroxyethyl starch (HES) might cause interferences of the colloid with a variety of laboratory tests. We aimed to evaluate potential influences of HES 130/0.4, the newest HES type, on several common hematology and ...
Dieplinger, Benjamin   +7 more
core   +1 more source

Characterization and Electrocatalytic Properties of the Phosphomolybdate-PAMAM Nanocomposite Film

open access: yesInternational Journal of Electrochemical Science, 2019
The phosphomolybdate-PAMAM nanocomposite film was successfully prepared by using a submonolayer of 3-mercaptopropionic acid (3-MPA) adsorbed on a polycrystalline gold electrode further reacted with poly(amidoamine) (PAMAM) dendrimer (generation 4.0) to ...
Daolin Zhu, Shouguo Wu, Yijiang Shao
doaj   +1 more source

Phenolic compounds and antioxidant activity of different parts of three mandarin varieties extracts: A comparative study

open access: yesNAJFNR, 2020
Background: Mandarin by-products, such as peels and seeds, are considered as one of the naturel source of phenolic compounds. Aim: The objective of the present study was to compare the phenolic compounds contents and antioxidant activity of different ...
Makhlouf Chaalal   +2 more
doaj   +1 more source

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