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Prikaz rezultata 21-28 od 28
The crystal structure of aqua-bis(3-acetyl-2-oxo-2H-chromen-4-olato-κ2O,O′)zinc(II)monohydrate, C22H18O10Zn
(2019-05-08)
C22H18O10Zn, triclinic, P1̄ (no. 2), a = 7.9616(3) Å, b = 9.5386(3) Å, c = 14.2569(4) Å, α = 81.713(3)°, β = 82.724(3)°, γ = 73.103(3)°, V = 1021.03(6) Å3, Z = 2, Rgt(F) = 0.0223, wRref(F2) = 0.0603, T = 295(2) K.
CCDC ...
The crystal structure of 3-nitro-4-(p-tolylamino)-2H-chromen-2-one, C16H12N2O4
(2019-10-14)
C16H12N2O4, triclinic, P1 (no. 2), a = 10.7105(5) Å, b = 11.2685(5) Å, c = 13.0145(6) Å, α = 99.292(4)°, β = 109.607(4)°, γ = 96.771(4)°, V = 1435.01(12) Å3, Z = 4, Rgt(F) = 0.0427, wRref(F2) = 0.1124, T = 295(2) K.
CCDC ...
Total Normalcy of Knots
(Faculty of Sciences and Mathematics, University of Niš, 2019-01-01)
In this paper we consider first order infinitesimal bending of curves and knots. The total
normalcy of the knot during the first order infinitesimal bending is discussed and expressions for the first variation of the total ...
A new longipinane ketone from Achillea abrotanoides (Vis.) Vis.: chemical transformation of the essential oil enables the identification of a minor constituent
(Wiley-VHCA AG, Zurich, Switzerland, 2019-12-10)
Introduction: Minor plant constituents are difficult to identify due to the challenging
isolation and acquiring of reliable spectral data. Essential oils abound in such minor
constituents that might be of high importance ...
Diethyl-ether flower washings of Dianthus cruentus Griseb. (Caryophyllaceae): Derivatization reactions leading to the identification of new wax constituents
(Wiley-VHCA AG, Zurich, Switzerland, 2019-05-07)
Some carnation species (Dianthus spp., Caryophyllaceae) exhibit a strong resistance to drought stress that is connected with the increased surface wax formation. Wax composition is unknown for the majority of Dianthus spp. ...
Optimization and validation of the kinetic spectrophotometric method for quantitative determination of the pesticide atrazine and its application in infant formulae and cereal-based baby food
(Wiley-VHCA AG, Zurich, Switzerland, 2019-05-11)
BACKGROUND: Pesticides are potentially toxic to humans and can produce both acute and chronic health effects, depending on the quantity and the ways in which a person is exposed. Exposure to pesticides can cause serious ...
Analiza uticaja različitih građevinskih materijala na nivo radona u kućama starije gradnje
(Institut za nuklearne nauke „Vinča―Društvo za zaštitu od zračenja Srbije i Crne Gore, 2019-10-04)
Грађевински материјали (гранит, песак, шљунак, камен, и др.) садрже природне радионуклиде пореклом из земље. Да би анализирали утицај грађевинских материјала на концентрацију радона у објектима старије градње, спроведено ...
Figurative numbers contribution in perceiving the legality in numerous strings tasks and log-term memory of numerous data
(Modestum, 2019-01-27)
Contemporary mathematics teaching is mostly reduced to the application of algebraic
formulas and algebraic procedures. The visual-logical approach in solving
mathematical tasks is very little represented in teaching ...