Results 11 to 20 of about 4,361,664 (283)

Extraction and characterization of polyphenolic compounds and potassium hydroxycitrate from Hibiscus sabdariffa

open access: yesFuture Foods, 2021
Hibiscus sabdariffa calyces were used to extract the polyphenolic compounds with three different solvents (water, methanol, and ethanol). The augmentation of temperature from 23 °C to 90 °C caused an adverse effect to polyphenols through thermal ...
Manisha Singh   +3 more
doaj   +2 more sources

Alternative Targets for Modulators of Mitochondrial Potassium Channels

open access: yesMolecules, 2022
Mitochondrial potassium channels control potassium influx into the mitochondrial matrix and thus regulate mitochondrial membrane potential, volume, respiration, and synthesis of reactive oxygen species (ROS).
Antoni Wrzosek   +4 more
doaj   +1 more source

The Features of Potassium Dynamics in ‘Soil–Plant’ System of Sour Cherry Orchard

open access: yesPlants, 2023
This research aimed to study interannual and seasonal dynamics of different potassium compounds in orchard soil and the potassium status of sour cherry trees affected by the application of nitrogen and potash fertilizers. Afield experiment was started in
Tatyana Roeva   +4 more
doaj   +1 more source

Coordination Polymers of Polyphenyl-Substituted Potassium Cyclopentadienides

open access: yesMolecules, 2022
A series of potassium salts of di- and tri-arylsubstituted cyclopentadienes has been obtained by the metalation of the corresponding cyclopentadienes with benzylpotassium in THF media.
Pavel D. Komarov   +9 more
doaj   +1 more source

A New Method of Halogenation of Aromatic Compounds [PDF]

open access: yesمجلة جامعة الانبار للعلوم الصرفة, 2012
: A halogenation of eleven aromatic compounds using a new method for iodination of activated aromatic compounds is presented. The reaction of one mole of aromatic compound with a mixture of one mole Potassium iodide and two moles Potassium sulfate in the
Marwan M. Farhan
doaj   +1 more source

K2CO3-Promoted oxy-Michael Addition/Cyclization of α,β-Unsaturated Carbonyl Compounds with Naphthols: Synthesis of Naphthopyrans

open access: yesMolecules, 2023
A potassium carbonate promoted tandem oxy-Michael addition/cyclization of α,β-unsaturated carbonyl compounds with naphthol derivatives for the synthesis of 2-substituted naphthopyrans was developed.
Shan-Shan Li   +5 more
doaj   +1 more source

Lithium recovery from lepidolite roasted with potassium compounds

open access: yes, 2020
Three different potassium compounds, namely K2SO4, KOH, and K2SO4 + KOH, were used as additives to extract lithium from lepidolite by roasting and water leaching.
Hui Su   +7 more
semanticscholar   +1 more source

Improvement of 200 kHz optical beam scanner performance with multiple internal reflection

open access: yesThe Journal of Engineering, 2014
The authors have realised a KTa(x)Nb(1−)(x)O(3)-based optical beam scanner that has three- and five-pass configurations with internal reflection whose scanning angle is exactly proportional to the optical path length.
Seiji Toyoda   +2 more
doaj   +1 more source

Microstructure and properties of Bi(2)O(3) doped 0.8(K(0.52)Na(0.48)) NbO(3)–0.2KSr(2)Nb(5)O(15) lead-free ceramics

open access: yesIET Nanodielectrics, 2019
The 0.8(K(0.52)Na(0.48))NbO(3)–0.2KSr(2)Nb(5)O(15)-yBi(2)O(3) (0.8KNN-0.2KSN-yBi(2)O(3)) lead-free ferroelectric composite ceramics were synthesised using rod-like KSr(2)Nb(5)O(15) (KSN) and isometric (K(0.52)Na(0.48))NbO(3) (KNN) particles as raw ...
Yi-ting Guo   +4 more
doaj   +1 more source

Antioxidant Activity of New Sulphur- and Selenium-Containing Analogues of Potassium Phenosan against H2O2-Induced Cytotoxicity in Tumour Cells

open access: yesCurrent Issues in Molecular Biology, 2022
Among known phenolic antioxidants, the overwhelming majority of compounds have lipophilic properties and the number of known water-soluble compounds is very small.
Lyubov S. Klyushova   +2 more
doaj   +1 more source

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