نتایج جستجو برای: hydraulic resistance

تعداد نتایج: 402559  

سیدعلی مرتضوی, , سیدمحمدعلی رضوی, , سیدمحمود موسوی, ,

In this study, the effect of transmembrane pressure (TMP) on flux decline and protein rejection due to concentration polarization and fouling (adsorption) resistances during ultrafiltration of reconstituted skimmilk was investigated. UF experiments were carried out using a pilot plant unit equipped with spiral wound module and polysulfonamide UF membrane. A three-stage experimental strategy bas...

Journal: :Biology letters 2008
David A Coomes Steven Heathcote Elinor R Godfrey James J Shepherd Lawren Sack

General models of plant vascular architecture, based on scaling of pipe diameters to remove the length dependence of hydraulic resistance within the xylem, have attracted strong interest. However, these models have neglected to consider the leaf, an important hydraulic component; they assume all leaves to have similar hydraulic properties, including similar pipe diameters in the petiole. We exa...

H. M. M. Sadeghi and H. Bayat,

The use of roller compacted concrete (R.C.C) without conventional cover in important hydraulic structures is investigated through laboratory observation of abrasion phenomena sujected to high velocity flow and floating particles. The main parameters affecting abrasion and erosion resistance of R.C.C. studied in the present study include: "Mixed Hydraulic&#10&#10Mean Radius" (which collectively ...

Journal: :Physiologia plantarum 2017
Hafiz B Ahmad Frederic Lens Gaelle Capdeville Régis Burlett Laurent J Lamarque Sylvain Delzon

Drought-induced xylem embolism is a key process closely related to plant mortality during extreme drought events. However, this process has been poorly investigated in crop species to date, despite the observed decline of crop productivity under extreme drought conditions. Interspecific variation in hydraulic traits has frequently been reported, but less is known about intraspecific variation i...

H. M. M. Sadeghi and H. Bayat,

The use of roller compacted concrete (R.C.C) without conventional cover in important hydraulic structures is investigated through laboratory observation of abrasion phenomena sujected to high velocity flow and floating particles. The main parameters affecting abrasion and erosion resistance of R.C.C. studied in the present study include: Mixed Hydraulic Mean Radius (which collectively repres...

2013
Gretchen B. North Frank H. Lynch Franklin D. R. Maharaj Carly A. Phillips Walter T. Woodside

Epiphytic plants in the Bromeliaceae known as tank bromeliads essentially lack stems and absorptive roots and instead take up water from reservoirs formed by their overlapping leaf bases. For such plants, leaf hydraulic conductance is plant hydraulic conductance. Their simple strap-shaped leaves and parallel venation make them suitable for modeling leaf hydraulic conductance based on vasculatur...

Journal: :Lab on a chip 2015
Hazem Salim Damiri Hamzeh Khalid Bardaweel

Microfluidic networks represent the milestone of microfluidic devices. Recent advancements in microfluidic technologies mandate complex designs where both hydraulic resistance and pressure drop across the microfluidic network are minimized, while wall shear stress is precisely mapped throughout the network. In this work, a combination of theoretical and modeling techniques is used to construct ...

Journal: :Tree physiology 2006
Andrea Nardini Antonio Gascó Fabio Raimondo Emmanuelle Gortan Maria A Lo Gullo Tiziano Caruso Sebastiano Salleo

We investigated the hydraulic architecture of young olive trees either self-rooted or grafted on rootstocks with contrasting size-controlling potential. Clones of Olea europea L. (Olive) cv 'Leccino' inducing vigorous scion growth (Leccino 'Minerva', LM) or scion dwarfing (Leccino 'Dwarf', LD) were studied in different scion/rootstock combinations (LD, LM, LD/LD, LM/LM, LD/LM and LM/LD). Shoots...

Journal: :The New phytologist 2008
Nate McDowell William T Pockman Craig D Allen David D Breshears Neil Cobb Thomas Kolb Jennifer Plaut John Sperry Adam West David G Williams Enrico A Yepez

Severe droughts have been associated with regional-scale forest mortality worldwide. Climate change is expected to exacerbate regional mortality events; however, prediction remains difficult because the physiological mechanisms underlying drought survival and mortality are poorly understood. We developed a hydraulically based theory considering carbon balance and insect resistance that allowed ...

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