Претраживање
Приказ резултата 1-10 од 23
Effect of substituents on the 13 C chemical shifts of the azomethine carbon atom of N-(phenyl substituted) pyridine-4-aldimines
(Elsevier, 1999)
13 C chemical shifts of the azomethine carbon atom for N-(substituted phenyl)pyridine-4-aldimines, 4-Py-CH=N-C 6 H 4 -X, X having a wide range of substituent effects, have been determined in CDCl 3 solution. Exceptionally ...
Chemical composition of the essential oil of micromeria albanica (Griseb. ex K. Maly) Silic
(Taylor & Francis, 1999)
The composition of the essential oil of the Balkan peninsula endemic plant Micromeria albanica (Griseb. ex. K. Maly) Silic was analyzed for the first time by GC and GC/MS. The oil, which was present in 0.9% (v/w) yield, ...
Corrosion rates and negative difference effects for Al and some Al alloys
(Springer, 1999)
The rotating disc-ring technique with a Pt ring was used to quantitatively detect hydrogen evolved on an Al-disc electrode during spontaneous corrosion at open-circuit potential or during anodic polarization of an Al disc ...
Synthesis, crystal structure, magnetic properties and cyclic voltammetry of the unsymmetric (μ-oxalato)-[N,N′,N″,N‴-tetrakis-(2-pyridylmethyl)-1,4,8, 11-tetraazacyclotetra-decane]dicobalt(II) perchlorate trihydrate
(Taylor and Francis, 1999)
A new dinuclear cobalt(II) complex, [Co2(ox)tpmc](ClO4)2 3H2O, (tpmc = N, N′, N″, N″′-tetrakis(2-pyridylmethyl)-1, 4, 8, 11-tetraazacyclotetradecane, ox2 -oxalate ion), has been synthesized and its crystal structure solved ...
Acid-catalyzed rearrangement of some steroidal isoxazolidines
(Elsevier, 1999)
Acid-catalyzed reaction of the steroidal Δ 1 -unsaturated 3β,5β- epoxyimino compound 2 and Δ 3 -unsaturated 1β,5β-epoxyimino products 3 and 7, results in intramolecular rearrangement involving the N-CH 3 group to give the ...
Corrosion protection of aluminium by a cataphoretic epoxy coating
(Elsevier, 1999)
The corrosion behavior and thermal stability of epoxy coating electrodeposited on aluminium have been investigated during exposure to
3% NaCl. Electrochemical impedance spectroscopy (EIS), gravimetric liquid sorption ...
The Influence of Sintering Conditions on the Microstructure and Magnetic Properties of Sintered SmCo5 Magnets
(Springer Science and Business Media LLC, 1999)
Since the magnetic features of the magnet of Sm-Co type are in direct connection with microstructure, it is indispensable to achieve, in the procedure of synthesis of these materials, the microstructure which ensures the ...
Essential oil of achillea coarctata
(Taylor & Francis, 1999)
Essential oil of Achillea coarctata Poir. was investigated for yield and composition. Sixty identified compounds in the oil constituted 79-3% of the oil. The main compounds of the oil were: caryophyllene oxide (9.0%), ...
Flavones and sesquiterpene lactones from Achillea atrata subsp, multifida: Antimicrobial activity
(American Chemical Society (ACS), 1999)
Four flavones (1-4) and nine sesquiterpene lactones (5-13), one of them (5) a new compound, were isolated from the aerial parts of Achillea atrata L. subsp, multifida. Although the crude extract demonstrated in vitro ...
Guaianolides from Centaurea nicolai: Antifungal activity
(Elsevier, 1999)
A new guaianolide, 3-deacetyl-9-O-acetylsalograviolide A, along with four known closely related lactones, salograviolide A, 9-O- acetylsalograviolide A, kandavanolide and salograviolide B were detected in the aerial parts ...