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

