Results 21 to 30 of about 268,685 (303)

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   +1 more source

EFFECT OF SOME CHEMICAL INDUCERS RESISTANCE FOR CONTROLLING DOWNY MILDEW DISEASE OF GRAIN SORGHUM AND ITS IMPACT ON BIOCHEMICAL CHANGES [PDF]

open access: yesJournal of Plant Protection and Pathology, 2009
Fourdifferentchemical inducers for resistance and metalaxyl fungicide were tested to control sorghum downy mildew disease (Sorghum vulgare L.) caused by Peronosclerospora sorghi (Weston and Uppal) C.G. Shaw.
H. Awad   +3 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

Polarographic Determination of Potassium in Uranium Compounds

open access: yesCroatica Chemica Acta, 1966
The A. C. polarographic method is proposed for the determination of potassium in precipitates of the system: uran yl nitratepotassium hydroxide-potassium nitrate. Samples containing potassium and uranium were dissol ved in 4 M nitric acid, present u ranium was r emoved by continuous extraction with tetrahydropyrane.
Tomažić, B ., Branica, M.
openaire   +3 more sources

Thermochemistry of yavapaiite KFe(SO4)2: Formation and decomposition [PDF]

open access: yes, 2005
Yavapaiite, KFe(SO4)2, is a rare mineral in nature, but its structure is considered as a reference for many synthetic compounds in the alum supergroup. Several authors mention the formation of yavapaiite by heating potassium jarosite above ca. 400°C.
Forray, Ferenc Lázár   +2 more
core   +1 more source

Genotoxic and antigenotoxic properties of selenium compounds in the in vitro micronucleus assay with human whole blood lymphocytes and tk6 lymphoblastoid cells

open access: yesThe Scientific World Journal, 2006
Selenium is known to possess both genotoxic and antigenotoxic properties. In the present study, we have evaluated the genotoxicity and antigenotoxicity of three selenium compounds (sodium selenate, sodium selenite and selenous acid) by measuring in vitro
Eduard Cemeli   +2 more
doaj   +1 more source

Impact of some stimulants on boosting strawberry plants’ resistance to Tetranychus urticae Koch (Actinidida: Tetranychidae) [PDF]

open access: yesAcarines: Journal of the Egyptian Society of Acarology
The present study was conducted during the two seasons, 2017/2018 and 2018/2019 to evaluate the effect of some stimulating compounds on the mean population number of the movable stages of the two-spotted spider mite Tetranychus urticae per leaflet in two
Mohammed Ahmed, Mahmoud Ahmed
doaj   +1 more source

Potassium silicate and calcium chloride improve production and shelf-lifeof strawberries [PDF]

open access: yesFayoum Journal of Agricultural Research and Development, 2023
The short shelf-life of strawberry fruits is the main challenge for transportation over long distances during export and import around the world. Adding postharvest treatments could increase fruits decay during transportation.
Shereen S. F. EL-Sayed   +2 more
doaj   +1 more source

Synthesis and Characterization of some Oxadiazolesand Thiadiazoles derivatives [PDF]

open access: yesمجلة جامعة الانبار للعلوم الصرفة, 2012
: A number of heterocyclic compounds was synthesized from the reaction of methyl benzoate (1) with hydrazine hydrate in the presence of alcohol to give phenyl hydrazide (2).The phenyl hydrazide (2) had been treated with various aromatic aldehydes in ...
Ali Omairi Mohammad
doaj   +1 more source

Poly[diaqua­[3,5-bis­(trifluoro­meth­yl)pyrazolido]potassium] [PDF]

open access: yes, 2010
The asymmetric unit of the title compound, [K(C5HF6N2)(H2O)2]n, is composed of two 3,5-bis­(trifluoro­meth­yl)pyrazol­ide anions, two potassium cations and four water mol­ecules.
Lerner, Hans-Wolfram   +5 more
core   +1 more source

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