Auteur Alexey V. Tkachev
Documents disponibles écrits par cet auteur (8)
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Wudeneh Letchamo, Auteur ; Elena A. Korolyuk, Auteur ; Alexey V. Tkachev, Auteur |The chemical composition of the leaf oil of Schizonepeta annua (Pallas, Schischkin) from Altai Region, Siberia, which was obtained in 4.0% yield, was investigated by GC and GC/MS. The major components were thymol (48.1%), γ-tepinene (18.1%), car[...]
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Wudeneh Letchamo, Auteur ; Elena A. Korolyuk, Auteur ; Alexey V. Tkachev, Auteur |Distillation of the flowering tops of Sium latifolium L, from Altai Region for 3 h yielded 0.05%, mobile colorless oil reminiscent of angelica root oil. By analyzing the oil samples using GC and GC/MS, we found that the major components were lim[...]
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Alexey V. Tkachev, Auteur ; Elena A. Korolyuk, Auteur ; Wudeneh Letchamo, Auteur |Distillation of the flowering tops of Kadenia dubia (Schkuhr) Lavrova et V.N.Tichom., from Altai Region for 3 h yielded 0.03% aromatic, mobile light yellowish-green oil. By analyzing the oil samples using GC and GC/MS, we found that the major co[...]
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Alexey V. Tkachev, Auteur ; Elena A. Korolyuk, Auteur ; Wudeneh Letchamo, Auteur |Distillation of the fresh flowering tops of Heteropappus altaicus Willd. (Novopokr.) collected from four different altitudes of Altai Region of Siberia yielded mobile, dark green to yellowish oils, depending on the altitude and location of colle[...]
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Alexey V. Tkachev, Auteur ; Elena A. Korolyuk, Auteur ; Wilfried König, Auteur |Distillation of the flowering tops of Seseli buchtormense (Fisch. ex Sprengel) W. Koch obtained from various altitudes of Altai Region yielded 0.21% (300 m.a.s.l.), 32% (400 m.a.s.l.), 30% (700 m.a.s.l.) and 0.40% (2030 m.a.s.l.), of aromatic pu[...]
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Sergey P. Verevkin, Auteur ; Vladimir N. Emel'yanenko, Auteur ; Alexey V. Tkachev, Auteur |This work has been undertaken to obtain new thermochemical data for ethanediol and propanetriol acetates and to improve the group contribution methodology for the prediction of the thermodynamic properties of compounds relevant to biodiesel. Sta[...]
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Sergey P. Verevkin, Auteur ; Vladimir N. Emel'yanenko, Auteur ; Alexey V. Tkachev, Auteur |A thermodynamic analysis of the experimental conditions of the Beckmann rearrangement reaction of oximes into amides has been undertaken to examine whether the reaction is under thermodynamic or kinetic control. To answer this question, the ther[...]
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Alexey V. Tkachev, Auteur ; Elena A. Korolyuk, Auteur ; Wudeneh Letchamo, Auteur |Distillation of the fresh flowering tops of wild-growing Solidago virgaurea L. collected from the Russian Altai at 290 m and 650 m yielded 0.22% and 0.07% pure light yellow oil, respectively. GC and GC/MS analyses of the oils revealed that the m[...]
