نتایج جستجو برای: populus nigra l
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در اختیار داشتن اطلاعات اولیه و زیربنایی اولین گام در طراحی و اجرای طرحهای تحقیقاتی است . کسب اطلاعات فنولوژی و مشخصه های رویتی در درختان مسن (عرصه کلکسیون) و نیز درختان جوان (عرصه خزانه) صنوبر می تواند اطلاعات مورد نیاز محقیقین و کارشناسان صنوبر را جهت اجرای طرحهای مختلف تحقیقاتی فراهم نماید. در این بررسی مشخصه های فونولوژی 29 کلن صنوبر کلکسیونهای پایه مادری در دو منطقه کرج و صفرا بسته در سال ...
the potential use of nano technology for improving of withdrawal resistance of nail and screw in wood was evaluated. for this, the maintenance strength of nail and screw was measured under dry and wet conditions for poplar wood (populus nigra) coated with common paints in furniture industry and nano-particles. specimens with dimensions of 15×5×5 cm3 (l×r×t) were cut from poplar wood (populus ni...
Bu çalışmada, kara kavak (Populus nigra L.) odunu 120, 160 ve 200 oC’lerde ısıl işleme tabi tutulmuş, devamında %25 %50 oranında presleme uygulamasıyla örneklere yoğunlaştırma işlemi gerçekleştirilmiştir. Isıl işlem görmüş örneklerin FTIR spektrumları, kristallik indeksinde işlemden kaynaklanan kayda değer bir farklılaşmanın oluşmadığını ortaya koymuştur. TGA DTG termogramlarındaki esas bozunma...
Black locust is an interesting option for biomass production at sites prone to water shortage because the species combines water-use efficiency and a yield largely superior that of poplars under conditions study. (Robinia pseudoacacia L.) tree woody production. However, its potential this purpose has been much less studied characterized than from Salicaceae family (i.e., poplar willow). The obj...
Hydrogen peroxide (H₂O₂) is one of the most abundant reactive oxygen species (ROS), which plays dual roles as a toxic byproduct of cell metabolism and a regulatory signal molecule in plant development and stress response. Populus simonii × Populus nigra is an important cultivated forest species with resistance to cold, drought, insect and disease, and also a key model plant for forest genetic e...
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