Comparison of the Essential Oil Composition of Wild Rhododendron tomentosum Stems, Leaves, and Flowers in Bloom and Non-bloom Periods from Northeast China

Diurnal Effects on Chinese Wild <i>Ledum palustre</i> L. Essential Oil Yields and Composition

“…Predominant presence of alpha-thujene, beta-thujene and bornyl acetate in L. palustre essential oil was also reported in previous studies [3] [8] compared the essential oil compositions from wild L. palustre stems, leaves, and flowers in bloom and non-bloom periods from Northeast China. The study reported the predominant constituents in all oils were 4-thujene, 5-(1-methylethyl)-bicyclo[3.…”

Chemical Composition and Antioxidant Activity of the Essential Oils of Citral-Rich Chemotype Cinnamomum camphora and Cinnamomum bodinieri

“…citral chemotype (0.8%) [ 19 ], significantly higher than C. camphora ordinary varieties (0.212–0.480%) [ 16 ]. The yield of essential oils depends on the genotype [ 32 ], geographical origin [ 33 , 34 ], the time of harvest [ 35 ], the temperature [ 36 ], the humidity level [ 37 ], the nature of the soil [ 38 ], the organ of the used plant [ 22 , 23 ], the organ’s age [ 39 ], plant density [ 40 ], nutrient application [ 32 ] and the extraction method [ 16 , 27 , 41 ]. The samples tested in the experiment were collected from the same cutting orchard and the environmental conditions were similar when their leaves were picked.…”

“…The antioxidation of natural plant essential oils is very important for their application in the fields of medicine, food and spices, which overcome the deleterious effect of chemically synthesized antioxidants. The 2,2-diphenyl-1 picrylhydrazyl (DPPH) free radical scavenging test, scavenging 2,2′-azinobis(3-ethylbenzo thiazoline-6-sulfonic acid) diammonium salt radical (ABTS) and the ability of Ferric reducing antioxidant power (FRAP) are the most common methods used to evaluate the antioxidant activity of compounds, and various phytoconstituents and their potential antioxidant activities have been reported previously [ 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ]. In terms of the C. camphora’s antioxidant activities, linalool, eucalyptol, camphor and borneol chemotypes with strong scavenging activity against 2,2-diphenyl-1 picrylhydrazyl (DPPH) were proved [ 17 ].…”

Environmentally acquired chemical camouflage affects Pieris brassicae L. host plant selection and orientation behaviour of a larval parasitoid

“…It is a subarctic and boreal fragrant shrub with circumpolar distribution and growing mostly in peatlands and forest understory (Dampc and Luczkiewicz 2013). Particularly European provenances (Raal et al 2014;Zhao et al 2016) of the species are rich with species specific volatiles and semi-volatile terpenoids in essential oil stored in glandular trichomes on surface of stems and leaves (Dampc and Luczkiewicz 2013;Mofikoya et al 2018b;Zhao et al 2016). Major volatile compounds in distilled essential oil and volatile emission are semi-volatile sesquiterpene alcohols palustrol and ledol, sesquiterpene ledene and monoterpene myrcene.…”