نتایج جستجو برای: juniperus
تعداد نتایج: 2460 فیلتر نتایج به سال:
Umbelliferone, 13 lignans and an unusual compound 2-(3,4-methylenedioxyphenyl)propane-1,3-diol, were isolated from the leaves of Juniperus chinensis. The lignans include meso-secoisolariciresinol, 3,4-methylenedioxy-3’,4’dimethoxylignan-9’,9-olide, hibalactone, isohibalactone, 7-oxohinokinin, 7-hydroxyhinokinin, 7-acetyloxyhinokinin, (+ )-xanthoxylol, dihydrodehydrodiconiferyl alcohol, 3-methox...
Our conclusion that a Juniperus virginiana stand in the central Appalachian Mountains is recovering from decades of acid deposition was based on tree ring carbon isotope ratios (δC) that show: (i) close correspondence between the timing of changes in direction of δC with declines in SO2 emissions occurring after the Clean Air Act; (ii) close similarities between patterns of δC after 1980 and du...
Background and purpose: Urolithiasis is one of the most common diseases of urinary tract. Abdominal colic pain, nausea and vomiting, and hematuria are the major clinical complains. Renal stones may obstruct urinary tract, and then damage the kidney. Medical treatment, removing the stones by extracorporeal shock wave lithotripsy, percutaneous lithotripsy, and ureteroscopic lithotripsy are common...
In this study, we analyzed distribution of species the genus Gymnosporangium in mountain regions Uzbekistan, including Western Tien Shan and Pamir-Alay. Four (G. confusum, G. sabinae, fusisporum, turkestanicum) are reported for Uzbekistan. The telial hosts these rust fungi Juniperus, while aecial Uzbekistan representatives genera Cotoneaster, Crataegus, Sorbus, Pyrus (all Rosaceae). It has been...
Leaf hydraulics, gas exchange and carbon storage in Pinus edulis and Juniperus monosperma, two tree species on opposite ends of the isohydry-anisohydry spectrum, were analyzed to examine relationships between hydraulic function and carbohydrate dynamics. Leaf hydraulic vulnerability, leaf water potential (Ψl ), leaf hydraulic conductance (Kleaf ), photosynthesis (A), stomatal conductance (gs) a...
butyl-hydroxytoluene (bht) is one of the major synthetic antioxidants with a wide range usage. replacement of artificial antioxidants with natural antioxidants is highly considered. in this research, the antioxidant activity of juniperus excelsa was investigated by using reducing power, dpph radical scavenging and inhibition of lipid peroxidation. also, the amounts of phenolic and flavonoid com...
در نظر گرفتن ویژگی های محیطی محل رویش گیاه در طبیعت می تواند بر میزان و کیفیت مواد موثره و اسانس گیاهان تاثیر داشته باشد. گیاه پیرو با نام علمی juniperus communis گیاهی است همیشه سبز که بومی اروپا بوده و متعلق به تیره سرو است. این گیاه اسانس دار از مهمترین گیاهان رویشگاه های کوهستانی ایران به شمار می رود و تنها گونه از ارس بوده که در مناطق نیمکره شرقی و همچنین در نیمکره غربی پراکنش دارد. در این...
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