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海拔高度因素对伊朗Nour巴拉代区产多头菊蒿挥发油含量及质量的影响(英文)

中国天然药物 2013年第5期11卷 553-559页

作者： Mahdavi M. j.uri M.H mahmoudi j. Rezazadeh F. Mahzooni-Kachapi S.S. The Natural Resources Department The Islamic Azad University

Medicinal plant are grown and produced in different ecosystems and sites under the influence of different potential factors,including the altitude as one of the vital determinants in the quantity and quality of the *** of the species that grows in the highlands is Tanacetum polycephalum,an aromatic perennial of the *** species is characterized to be antiseptic,analgesic,anesthetic,disinfective,expectorant,anti-cancer,anti-allergic,and conducive to low blood *** purpose of this study is to investigate the essential compositions in the aerial parts of *** at the time of flowering,and in three different altitudes of the Baladeh region of ***,the essential oil was extracted from the aerial parts in the flowering stage of the plant at three altitudes of 1 600,2 400 and 3 200 m using a water distillation method,and the essential oil compositions were identified using GC and GC/MS ***-way ANOVA method was conducted to analyze the obtained data using SPSS,and a Duncan test was administered to compare the *** results indicated that the essential output obtained from the altitudes of 1 600,2 400 and 3 200 m was(0.74±0.01)%,(1.09±0.02)%,and(1.32±1.2)%,respectively,so that the altitude of 3 200 m revealed the greatest quantity,and the altitude of 1 600 m represented the smallest ***,the essential oil compositions showed the highest percentage in the altitude of 3 200 m and the lowest percentage at the altitude of 1 600 *** results showed that as the altitude increases,the essential oil compositions revealed the greater quantity and percentage in the aerial parts of ***.

关键词： Essential oil Tanacetum polycephalum Essential oil production Essential oil composition

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Controlled Laser Transformation Hardening of Martensitic Stainless Steel by Pulsed Nd:YAG Laser

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j.urnal of Electronic Science and Technology of China 2010年第1期8卷 87-90页

作者： B.mahmoudi A.R.Sabour Aghdam M.j.Torkamany School of Material Science and Engineering Tarbiat Modares UniversityTehranIran Iranian National Centre for Laser Science and Technology PO Box 14665-576TehranIran610054

Laser transformation hardening （LTH） was applied to the surface of the AISI 420 martensitic stainless steel by a pulsed Nd：YAG laser to obtain optimum hardness. The influences of process parameters （laser pulse energy, duration time, and travel speed） on the depth and hardness of laser treated area were investigated. Image analysis of SEM microstructure of AISI 420 showed that plate-like carbide have almost fully and （30-40）% of globular carbide particles dissolved into the matrix after laser transformation hardening by pulsed laser and the microstructure was refined to obtain controlled tempered martensite microstructure with 450 VHN hardness.

关键词： Laser transformation hardening,martensitic stainless steel martensite microstructure,pulsed Nd:YAG laser.

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维普期刊数据库

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