نتایج جستجو برای: alpha pinene

تعداد نتایج: 203730  

Journal: :Molecules 2010
Wei Qing Li Cai Hong Jiang Sha Sha Chu Ming Xue Zuo Zhi Long Liu

In our screening program for new agrochemicals from Chinese medicinal herbs, Murraya exotica was found to possess insecticidal activity against the maize weevil, Sitophilus zeamais and red flour beetle, Tribolium castaneum. The essential oil of aerial parts of M. exotica was obtained by hydrodistillation and investigated by GC and GC-MS. The main components of M. exotica essential oil were spat...

Journal: :Zeitschrift fur Naturforschung. C, Journal of biosciences 2013
Hui Zhang Dayong Zhou Youqing Luo Jinlin Wang Shixiang Zong

Volatiles emitted by healthy, mechanically damaged, and weevil-infested Artemisia ordosica (Asteraceae) were obtained through a dynamic headspace method and analysed by automatic thermal desorption/gas chromatography/mass spectrometry (ATD/GC/MS). Twenty-eight compounds in all were identified, and the qualitative as well as quantitative differences were compared. The green leaf volatiles 2-hexe...

2016
Letian Xu Zhanghong Shi Bo Wang Min Lu Jianghua Sun

The exposure to plant defense chemicals has negative effects on insect feeding activity and modifies insect gut microbial community composition. Dendroctonus valens is a very destructive forest pest in China, and harbors a large diversity and abundance of gut microorganisms. Host pine defensive chemicals can protect the pines from attack by the holobiont. In this study, boring length of D. vale...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علوم کشاورزی و منابع طبیعی گرگان - دانشکده مرتع و آبخیزداری و شیلات و محیط زیست 1391

چکیده دو گونهartemisia sieberi besser و artemisia aucheri boiss گونه های پایا از جنس درمنه هستند که غالباً به صورت خودرو در مراتع استپی و نیمه استپی ایران گسترش دارند. این تحقیق جهت شناسایی تاثیر برخی عوامل اکولوژیکی و چرای دام بر کمیت و کیفیت اسانس این دو گونه در مراتع استپی و نیمه استپی استان اصفهان انجام گرفت. نتایج شاخص های کمی و کیفی اسانس گونهartemisia sieberi نشان داد که تعداد ترکیب...

2016
Matti P. Rissanen Tuija Jokinen Siegfried Schobesberger Arnaud P. Praplan Mikko Sipilä Nina Sarnela Heikki Junninen Jonathan Duplissy Juha Kangasluoma Jani Hakala Daniela Wimmer Alexey Adamov Katrianne Lehtipalo Tuomo Nieminen Markku Kulmala Douglas R. Worsnop

Alpha-pinene oxidation was studied in the CERN CLOUD chamber under near atmospheric conditions using varying levels of different oxidizers (i.e., O3, HOx and NOx with differing gas mixture compositions) in the presence and absence of UV-radiation, SO2 and additional organic traces; ammonia (NH3) and dimethylamine (DMA). The oxidation products and their evolution due to aging in the chamber were...

Journal: :The Journal of organic chemistry 2004
Angela L Sauers Douglas M Ho Stefan Bernhard

This paper describes the synthesis of four chiral derivatives of the electronically highly conjugated tetra-2-pyridylpyrazine (TPPZ) bridging ligand, which are denoted (R)- and (S)-4,5- and 5,6-pineno-tetra-2-pyridylpyrazine (PTPPZ). Preparation of these ligands was undertaken through the use of commercially available, enantiomerically pure (1R)- and (1S)-alpha-pinene, which was functionalized ...

Journal: :Acta pharmaceutica 2006
Baby Sabulal Mathew Dan Nediyamparambu Sukumaran Pradeep Renju Krishna Valsamma Varughese George

Essential oil from the fruits of Amomum cannicarpum (Wight) Bentham ex Baker (Zingiberaceae) was hydrodistilled and characterized by gas chromatography-mass spectrometry (GC-MS). Major constituents of the oil were beta-pinene (14.00%), elemol (10.45%) and alpha-cadinol (8.50%). Thirty-three (91.48%) out of forty-one constituents were identified by GC-MS and subsequent data analysis. Antimicrobi...

Journal: :Anais da Academia Brasileira de Ciencias 2007
Maria Rose Jane R Albuquerque Sonia Maria O Costa Paulo N Bandeira Gilvandete Maria P Santiago Manoel Andrade-Neto Edilberto R Silveira Otilia D L Pessoa

The chemical composition of the essential oils from aerial parts of Pectis apodocephala and Pectis oligocephala were analyzed by GC-MS. The essential oils of these species were predominantly constituted by monoterpenes. Geranial (42.9-44.5%), neral (32.2-34.2%) and alpha-pinene (10.7-11.4%) were the main constituents in the oil of P. apodocephala, while p-cymene (50.3-70.9%) and thymol (24.4-44...

2012
Rosana O Babu Dinsha Moorkoth Shamina Azeez Santhosh J Eapen

Glutathione S-transferases (GSTs) enzymes are critical antioxidant and detoxification system responsible for long-term existence of nematodes in host species. Hence, 16 phytochemicals predicted and reported to have potential nematicidal activity have been docked to GST enzyme of Meloidogyne incognita to assess their binding affinity and inhibitory activity. In vitro effects of these phytochemic...

Journal: :iranian journal of pharmaceutical sciences 0
mohammad ali massumi department of pharmacognosy, faculty of pharmacy, and medicinal plants research center, medical sciences/ university of tehran, iran mohammad reza fazeli department of drug and food control, tehran university of medical science, tehran, iran seyed hamid reza alavi iau pharmaceutical sciences branch, medicinal plants research center, tehran university of medical sciences, tehran, iran yousef ajani institute of medicinal plants, acecr, tehran, iran

the essential oil of prangos ferulacea (apiaceae) fruits was obtained by hydrodistillation and analyzed by gas chromatography (gc) and gc-mass spectrometery (ms). among the 39 identified constituents accounting for 99.99% of the total oil, the major components were chrysanthenyl acetate (26.53%), limonene (19.59%), alpha pinene (19.50%), delta-3-carene (6.56%), mesitaldehyde (6.09), and germacr...

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