نتایج جستجو برای: pinene

تعداد نتایج: 2078  

Journal: :Journal of occupational health 2006
Qingjun Wei Koichi Harada Shoko Ohmori Keiko Minamoto Changnian Wei Atsushi Ueda

Myoga is a fragrant plant which is the special product of Japan and is cultivated throughout Japan. According to our earlier investigation (unpublished data) of myoga cultivators in Japan, 8 of 35 cultivators experienced contact dermatitis in the harvest season. The purpose of this study was to assess the allergenicity of myoga and its major volatile components. The volatile components of myoga...

2016
Jasmin Tröstl Federico Bianchi Andreas Kürten Linda Rondo Mario Simon Nina Sarnela Tuija Jokinen Martin Heinritzi Josef Dommen Jasper Kirkby Ernest Weingartner Urs Baltensperger

The role of -pinene in aerosol nucleation and growth was investigated using the CERN CLOUD chamber, a nano scanning mobility particle sizer (nanoSMPS) and several condensation particle counters (CPCs) with different diameter cut-offs. Different oxidation conditions for -pinene – OH⋅ vs. ozone oxidation – were considered to investigate their contributions to particle nucleation and growth. Resul...

2010
İbrahim Tümen Markku Reunanen

Oleoresin samples collected from Pinus sylvestris L. trees from Acıpayam, Çal and Çamlıbel, three different locations in Denizli-Turkey. The constituents of the turpentine oil, obtained by hydrodistillation of oleoresin of Pinus sylvestris L., were identified by GC-MS. Fifty four constituents were detected from the turpentine oil, which constituted about between 96.2% and 98.2% of the total amo...

Journal: :The journal of physical chemistry. A 2012
Vinita Lal Alexei F Khalizov Yun Lin Maria D Galvan Brian T Connell Renyi Zhang

Epoxides have recently been identified as important intermediates in the gas phase oxidation of hydrocarbons, and their hydrolysis products have been observed in ambient aerosols. To evaluate the role of epoxides in the formation of secondary organic aerosols (SOA), the kinetics and mechanism of heterogeneous reactions of two model epoxides, isoprene oxide and α-pinene oxide, with sulfuric acid...

2015
D. C. Draper D. K. Farmer Y. Desyaterik J. L. Fry

The effect of NO2 on secondary organic aerosol (SOA) formation from ozonolysis of α-pinene, β-pinene, 1-carene, and limonene was investigated using a dark flowthrough reaction chamber. SOA mass yields were calculated for each monoterpene from ozonolysis with varying NO2 concentrations. Kinetics modeling of the first-generation gasphase chemistry suggests that differences in observed aerosol yie...

Journal: :Zeitschrift fur Naturforschung. C, Journal of biosciences 2003
Bahman Nickavar Gholamreza Amin Sara Parhami

The composition of the hydrodistilled essential oils from the fruits and leaves of Thuja orientalis L. grown in Iran was analyzed by GC/MS. Nineteen and twenty-eight compounds have been identified in the volatile oils of the fruit and leaf, respectively. While the fruit oil contained alpha-pinene (52.4%), delta-3-carene (14.2%), alpha-cedrol (6.5%) and beta-phellandrene (5.1%), the leaf oil con...

Journal: :Journal of Chemical Ecology 2021

Aphids are destructive pests, and alarm pheromones play a key role in their chemical ecology. Here, we conducted detailed analysis of terpenoids the vetch aphid, Megoura viciae, its host plant Pisum sativum using gas chromatography/mass spectrometry. Four major components, (-)-?-pinene (49.74%), (E)-?-farnesene (32.64%), (-)-?-pinene (9.42%) ( +)-limonene (5.24%), along with trace amounts +)-sa...

2017
Nativ Dudai Alona Shachter Prabodh Satyal William N. Setzer

Background:Commiphora gileadensis (Hebrew: apharsemon) has been used since Biblical times to treat various ailments, and is used today in the traditional medicine of some Middle Eastern cultures. Methods: The essential oils from the stem bark, leaves, and fruits of Commiphora gileadensis-collected at the Ein Gedi Botanical Garden, Israel-were obtained by hydrodistillation and analyzed by gas ch...

2014

The essential oils associated with the flowers of Tithonia diversifolia (Hemsl.) A. Gray were extracted and characterized via hydrodistillation and Gas Chromatography. Hydrodistillation was done in an all-glass Clevenger-type apparatus. The extracts from the hydrodistillation were subjected to gas chromatography where the components of the essential oils were separated based on their molecular ...

Journal: :Phytopathology 1997
J T Blodgett G R Stanosz

ABSTRACT The in vitro effects of a red pine phenolic compound (pinosylvin), a phenolic compound common to other species (tannic acid), and the major red pine monoterpenes (alpha-pinene, beta-pinene, and delta-3-carene) on spore germination and mycelial growth of Sphaeropsis sapinea were examined. Two A and two B morphotype isolates were used. At 88 mug/mm(2), pinosylvin inhibited spore germinat...

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