نتایج جستجو برای: acer velutinum

تعداد نتایج: 3617  

2016
Alexandre Collin Christian Messier Benoît Côté Mario Fontana Nicolas Bélanger

Citation: Collin A, Messier C, Côté B, Fontana M and Bélanger N (2016) Contrasting Nutritional Acclimation of Sugar Maple (Acer saccharum Marsh.) and Red Maple (Acer rubrum L.) to Increasing Conifers and Soil Acidity as Demonstrated by Foliar Nutrient Balances. Front. Ecol. Evol. 4:85. doi: 10.3389/fevo.2016.00085 Contrasting Nutritional Acclimation of Sugar Maple (Acer saccharum Marsh.) and Re...

این تحقیق با هدف بررسی مقدماتی و شناسایی خواص آکوستیکی چوب افرا پلت انجام شد. خواص آکوستیکی مورد بررسی شامل فاکتور کیفیت، ضریب آکوستیک، کارآیی تبدیل آکوستیک، و مدول الاستیسیته (یانگ) بود که با استفاده از آزمون غیر مخرب سیستم مغناطیسی ارتعاش اجباری در تیر دوسر آزاد انجام شد. از آنجا که خواص ارتعاشی چوب به‌شدت تحت تأثیر مواد استخراجی آن است، نمونه‏ها به منظور کاهش محتوای مواد استخراجی در معرض حلا...

Journal: :caspian journal of environmental sciences 2010
r. akhavan

this research was conducted to investigate spatial variability and estimate tree attributes in a plantation forest in the caspian region of iran using geostatistical analysis. sampling was performed based on a 50m?125m systematic grid in a maple stand (acer velutinum boiss) 18 years of age using circular samples of 200m2 area. totally, 96 sample plots were measured in 63 hectares and 14.25 hect...

Journal: :caspian journal of environmental sciences 2014
al et r. ostadhashemi

the aim of this study was to develop an optimal sustainable forest plantation based on goal programming and analytic hierarchy process (ahp) methods. this study was carried out in guilan province, north of iran. first of all, the ecological capability of the study area for plantation establishment/maintenance was evaluated based on multi-factor method and specific ecological makhdoum model by m...

2013
LL Wong CC Chan JL Leung CY Yung KK Wu SYY Cheung CLM Lam

BACKGROUND There is no valid instrument for multidomain cognitive assessment to aid the detection of mild cognitive impairment (MCI) and mild dementia in Hong Kong. This study aimed to validate the Cantonese Addenbrooke's Cognitive Examination Revised (C-ACER) in the identification of MCI and dementia. METHODS 147 participants (Dementia, n = 54; MCI, n = 50; controls, n = 43) aged 60 or above...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علوم کشاورزی و منابع طبیعی ساری - دانشکده کشاورزی و منابع طبیعی 1392

به منظور بررسی بهترین مبداء ارتفاعی بذر از نظر کمی و کیفی چهار رویشگاه در چهار نیم رخ ارتفاعی در جنگل های منطقه ساری در نظر گرفته شد. منطقه مورد مطالعه به طور کلی از ارتفاع 315 متر تا ارتفاع حدود 2000 متر در محدوده ً15 َ8 ْ53 تا ً22 َ27 ْ53 طول شرقی و ً5 َ1 ْ36 تا ً5 َ11 ْ36 عرض شمالی واقع شده اند. لاجیم به عنوان پایین ترین دامنه ارتفاعی و با ارتفاع از سطح دریای آزاد 315 تا 425 متر و کلیج کلا با ارتفاع 850...

1999

--The purpose of this paper is to identify the potentials of Acer negundo for renaturalization under midcity condrtions. --+The focus is on recent Montreal experiences. Acer negundo in the past planted mostly in its colored -leaf varieties, is hardly available anymore in the nurseries. Despite this, and despite the fact that Acer negundo is not native to our region, it has established an increa...

Journal: :World Journal of Biology Pharmacy and Health Sciences 2023

The little monoecious tree known as Glochidion velutinum Wight also goes by the names Chinna usiri and velvety melon. It is a member of family Euphorbiaceae. capable reaching heights 9 metres has branches leaves that are elongated. nations India, Burma, Pakistan make up majority this plant's distribution range in world. A broad variety human health issues, including diabetes, inflammation, canc...

Journal: :Ecological applications : a publication of the Ecological Society of America 2006
Kurt O Reinhart Julie Gurnee Reyes Tirado Ragan M Callaway

The effects of invasive nonnative species on community composition are well documented. However, few studies have determined the mechanisms by which invaders drive these changes. The literature indicates that many nonnative plant species alter light availability differently than natives in a given community, suggesting that shading may be such a mechanism. We compared light quantity (photosynth...

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