نتایج جستجو برای: shade

تعداد نتایج: 5789  

2014
S. Amanda Caudill Fabrice J.A. DeClerck Thomas P. Husband

Shade coffee systems provide a refuge for biodiversity; however, research has been dominated by bird and insect studies with few studies that have focused on mammals living within coffee-dominated landscapes. Relative to other taxa studied, only 5% of the articles published on coffee and biodiversity pertain to mammals. We surveyed non-volant mammals, with an emphasis on small mammals, in 3 cof...

Journal: :Cell 2008
Yi Tao Jean-Luc Ferrer Karin Ljung Florence Pojer Fangxin Hong Jeff A. Long Lin Li Javier E. Moreno Marianne E. Bowman Lauren J. Ivans Youfa Cheng Jason Lim Yunde Zhao Carlos L. Ballaré Göran Sandberg Joseph P. Noel Joanne Chory

Plants grown at high densities perceive a decrease in the red to far-red (R:FR) ratio of incoming light, resulting from absorption of red light by canopy leaves and reflection of far-red light from neighboring plants. These changes in light quality trigger a series of responses known collectively as the shade avoidance syndrome. During shade avoidance, stems elongate at the expense of leaf and ...

2004
Robert W. Pearcy Hiroyuki Muraoka Fernando Valladares

4th International Workshop on Functional-Structural Plant Models, 7-11 june 2004 –Montpellier, France Edited by C. Godin et al., pp. 298-301 Invited talk Evaluating shrub architectural performance in sun and shade environments with the 3-D model Y-plant: are there optimal strategies? Robert W. Pearcy, Hiroyuki Muraoka, Fernando Valladares Section of evolution and Ecology University of Californi...

Journal: :Journal of Environmental Engineering (Transactions of AIJ) 2008

2013
Hervé Bertin Daghela Bisseleua Daniel Fotio Yede Alain Didier Missoup Stefan Vidal

Cocoa agroforests can significantly support biodiversity, yet intensification of farming practices is degrading agroforestry habitats and compromising ecosystem services such as biological pest control. Effective conservation strategies depend on the type of relationship between agricultural matrix, biodiversity and ecosystem services, but to date the shape of this relationship is unknown. We l...

Journal: :Tree physiology 2006
David Sánchez-Gómez Fernando Valladares Miguel A Zavala

We investigated the differential roles of physiological and morphological features on seedling survivorship along an experimental irradiance gradient in four dominant species of cool temperate-Mediterranean forests (Quercus robur L., Quercus pyrenaica Willd., Pinus sylvestris L. and Pinus pinaster Ait.). The lowest photochemical efficiency (F(v)/F(m) in dark-adapted leaves) was reached in deep ...

A Azizi, E KHodarahmi, MH Salari, SH Lawaf,

Background and Aim: Shade guide discoloration after disinfection can interfere with the appropriate color selection for dental restorations. Since one of the most important issues for patients is the color of the final restoration, the discoloration of shade guides due to disinfectants will be important. Infection control is a definite and important matter in dentistry. Due to the contradictory...

ژورنال: مجله دندانپزشکی 2005
جلالی, درسا , جلایی, حمید, مرادیان, سیامک ,

Background and Aim: With the introduction of porcelain veneers to fulfill patients’ esthetic needs, question raises about the ability of the veneers to cover the substructure discoloration. It seems that using shade modifiers under the porcelain veneers can neutralize the discoloration. The goal of this study was to determine the efficacy of shade modifiers in correcting tooth discoloration, wh...

Journal: :Photochemistry and photobiology 2012
Alfio V Parisi Robert Eley Nathan Downs

A measurement system is described that allows an objective review and evaluation of the amount of use by different population groups of provided shade structures. It employs the comparison of the erythemal UV exposure measured with dosimeters to either the vertex or forehead to that in full sun. The technique has been developed using three shade structures and found to provide a linear relation...

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