منابع مشابه
Comparison of terpene composition in Engelmann spruce (Picea engelmannii) using hydrodistillation, SPME and PLE.
Terpenes emitted by conifer trees are generally determined by analysing plant extracts or essential oils, prepared from foliage and cones using steam distillation. The application of these procedures limits experiments to cut plant materials. Recently headspace techniques have been adopted to examine terpene emission by living plants. This paper deals with the application of solid-phase micro-e...
متن کاملRestoration of a Rocky Mountain Spruce-Fir Forest: Sixth-Year Engelmann Spruce Seedling Response With or Without Tree Shelter Removal
This paper presents results following 6 growing seasons of a project designed to examine the use of tree shelters as a means to provide initial shade for planted Engelmann spruce seedlings. Seedlings were planted in 1996 on a 48-ha (119-ac) high-elevation site with different colors of tree shelters providing various degrees of shading. A control treatment, consisting of shading using debris wit...
متن کاملLeaf water stress in engelmann spruce: influence of the root and shoot environments.
The response of xylem pressure potential of Engelmann spruce (Picea engelmannii Engelm.) to environmental factors was studied in the natural subalpine environment. Data were analyzed in the context of a leaf water potential model based upon the van den Honert model for water transport through the soil-plant-atmosphere continuum. At soil temperatures of 10 to 15 C, xylem pressure potential decre...
متن کاملEngelmann Spruce Site Index Models: A Comparison of Model Functions and Parameterizations
Engelmann spruce (Picea engelmannii Parry ex Engelm.) is a high-elevation species found in western Canada and western USA. As this species becomes increasingly targeted for harvesting, better height growth information is required for good management of this species. This project was initiated to fill this need. The objective of the project was threefold: develop a site index model for Engelmann...
متن کامل[Camurati-Engelmann disease].
1Senior Registrar, Endocrinology, 2Consultant Endocrinologist, 3Consultant Radiologist, 4Senior Registrar, Orthopedic, 5Consultant Orthopedic Surgeon, 6Consultant Histo Pathologist, National Hospital of Sri Lanka. Figure 1. Xray skull – lateral. Figure 2. Histology of the bone biopsy shows mature thick cortical lamellar bone with regular prominent cement lines (thick arrow) with prominent osteo...
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ژورنال
عنوان ژورنال: Academic Medicine
سال: 2010
ISSN: 1040-2446
DOI: 10.1097/acm.0b013e3181c87d65