Results 71 to 80 of about 3,626 (207)
The Chemical Record, Volume 26, Issue 3, March 2026.This review highlights the characteristic odor markers of illicit drugs, emphasizing volatile markers from both natural and synthetic sources, and explores the shift from canine‐based detection to emerging noncontact sensing technologies. Illicit drug use remains a global concern, requiring effective detection methods to counter evolving concealment ...
Minwoo Kim +4 more
wiley +1 more source
In vitro activities of natural products against oral
BMC Complementary and Alternative Medicine, 2011 Background Candida-associated denture stomatitis is a frequent infectious disease. Treatment of this oral condition is difficult because failures and recurrences are common.
Marcos-Arias Cristina +3 more
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, 1991 JANSEN U, RUNSINK J, Mattay J. DIASTEREOMERIC 5,6-DIMETHYL-4H-1,3-DIOXIN-4-ONES FROM (-)-(1R,4S)-MENTHONE - SYNTHESIS AND NMR ANALYSIS. Liebigs Annalen der Chemie.
Mattay, Jochen, JANSEN, U, RUNSINK, J
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Dichlorination of (−)-Menthone and the Configurations and Conformations of the Products
Nippon kagaku zassi, 1971 (一)-メントン〔1〕に2molの塩素ガスまたは塩化スルホニルを作用させて, mp93.5～94°Cの〔2〕, mp71～72°Cの〔3〕, mp55～56°Cの〔4〕およびmp51～52°Cの〔5〕の4種の2, 4-ジクロルメントンを得た。これら異性体のIRスペクトル, NMRスペクトルおよびORDを測定し,それぞれ対応する立体配置を決め,その立体配座についてもそれぞれ解析した。 塩素化剤として塩化スルホニルを使用した場合には,生成物は主として塩素がトランスに置換した異性体〔4〕および〔5〕であった。また塩素ガスを使用すると,低温(40°C以下)では主としてシス異性体〔2〕および〔3〕が,高温(80°C)では主としてトランス異性体が生成する ...
Fujiko YASUHARA +2 more
openaire +2 more sources
The effect of substituents on the helical twisting power of aldol condensation products of menthone
, 2002 \u3cp\u3eThe helical twisting powers of the E-isomers of aldol condensation products of menthone and aromatic aldehydes are higher than those of the Z-isomers.
Ten Hoeve, Wolter +3 more
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Zeitschrift für Naturforschung B, 1988 Abstract 1,3-Dioxin-4-ones from Ketones Onium salt and acid catalyzed addition of di-ketene to (-)-menthone gives improved yields of 2 and 3. Excess of diketene leads to diastereomeric mixtures of compounds 4 and 6 from menthone and menthol, respectively.
Eckehard V. Dehmlow, Arthur Sleegers
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, 2016 International audienceCycloaddition reactions between a menthone-based chiral nitrone and alkenes or alkynes under microwave activation afforded a series of enantiopure cycloadducts in good yields and with high stereoselectivity.
Mssadek, M. +3 more
core +1 more source
Variability of chemical traits of peppermint (Mentha x piperita L.) [PDF]
Selekcija i Semenarstvo, 2000 The aim of this contribution was to establish variability and relationship between selected qualitative properties of mint (Mentha x piperita L.). During two year period, the content of the essential oil, as well as its major constituents (menthol ...
Dražić Slobodan, Ristić Mihajlo
doaj
Insecticidal Effects of Monoterpenes on Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae)
Journal of Applied Botany and Food Quality, 2013 Twenty eight monoterpenes including monoterpene hydrocarbons and oxygenated monoterpenes (borneol, borynl acetate, camphene, camphor, 3-carene, carvone, 1,8-cineole, citronellal, β-citronellene, β-citronellol, dihydrocarvone, fenchol, fenchone, geranyl ...
Erol Yildirim +2 more
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Zur Kenntnis der optisch‐aktiven Menthone [PDF]
Berichte der deutschen chemischen Gesellschaft, 1909 n ...
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