نتایج جستجو برای: leaf cross section

تعداد نتایج: 694687  

ژورنال: :مجله گیاهشناسی ایران 2013
سید ذبیح الله حسینی محمد رضا رحیمی نژاد حجت الله سعیدی

شباهت ظاهری بین گونه های برگ باریک جنس festuca l. منجر به استفاده از صفات پنهان مانند صفات تشریحی برای اهداف تاکسونومیک شده است. ساختار و آرایش بافت اسکلرانشیمی و تعداد رگبرگ ها به طوری که در برش عرضی برگ قابل مشاهده است دارای قابلیت های تشخیصی مهمی در تعدادی از اجتماعات گونه ای در جنس festuca هستند. تعداد 53 جمعیت منتخب از گونه های festuca، شامل نمونه های جمع آوری شده از سرتاسر کشور، نمونه های...

Journal: :Applied optics 1973
R Kumar L Silva

A light ray, incident at about 5 degrees to the normal, is geometrically plotted through the drawing of the cross section of a soybean leaf using Fresnel's equations and Snell's law. The optical mediums of the leaf considered for ray tracing are air, cell sap, chloroplast, and cell wall. The above ray is also drawn through the same leaf cross section considering cell wall and air as the only op...

2013
R. Kumar L. Silva

A light ray, incident at about 50 to the normal, io geometrically plotted through the drawing of the cross section of a soybean leaf using Fresnel's Equations and Snell's Law. The optical mediums of the leaf considered for ray tracing are: air, cell sap, chloroplast and cell wall. The above ray is also drawn through the same leaf cross section considering cell wall and air as the only optical m...

The leaf growth and cross-sectional area of durum wheat during its development may be reduced under salt stress due to vascular architecture alterations of leaves. A hydroponic experiment was conducted to compare growth rate and vascular architecture changes of two durum wheat cultivars including Shabrang and Yavaroos under 0 and 100 mM NaCl. Plants were sampled at the three-leaf stage growth. ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی عمران 1391

in this study, scour of mashkid bridge pier located in mashkid river of saravan county has been studied and to measure the scour rate, the numerical model hec-ras 4.0 has been used. upon selection of mashkid river as the case study and whereas the studied zone is important with respect to the climatic conditions and showery monsoon raining and flowing the great and destructive floodwaters, ther...

2013
P. Revathi M. Hemalatha

This work exposes the automatic computation system to analyse the cotton leaf spot diseases. First to initialize the images from the database (Image features) that are highly related to the test image (new image), where test image is given by the user. Three features are used for matching the train image features in database images, namely color feature variance, shape and texture feature varia...

Journal: رستنیها 2010
F. GHAHREMANINEJAD, M. SHEIDAI S. NARIMISA

The genus Inula L. belongs to tribe Inuleae (Asteraceae) with about 100 species in the world. In this study, leaf in cross section and epidermis in superficial view were studied. Twenty one characters were used for separating the species with an identification key. The most important characters like kind of hairs, shape of epidermal cells on both surfaces, stomata in superficial view and in cro...

G. Moghimislam, H. Latifi, M. R. Riahi,

The average velocity of water flow has been simultaneously measured with fluorescent and speckle imaging methods. The measured velocities with two methods are in good agreement with each other and it confirms that the speckle imaging method can be used as a confident method to measure the velocity of water flow in a dry leaf. Also the velocity of water flow through thick and thin xylems of a le...

Journal: :Anais da Academia Brasileira de Ciencias 2015
Ângela L Daltin Aline Oriani Vera L Scatena

The anatomy of leaves and inflorescence axes of Spathanthus (2 spp.), Rapatea (2 spp.), Cephalostemon (1 sp.), and Duckea (1 sp.) (Rapateoideae, Rapateaceae) was studied to identify useful characters for taxonomy. The cross-section shape of inflorescence axis differentiates the genera, while the cross-section shape and structure of leaf midrib has a specific value. The following characteristics...

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