Anatomical and physiological acclimation to water stress of the tree hydraulic system involves trade-offs between maintenance of stomatal conductance and loss of hydraulic conductivity, with short-term impacts on photosynthesis and long-term consequences to survival and growth. Here, we study the role of variations in root and branch maximum hydraulic specific conductivity (k(s-max)) under high...

Modern concepts of nuclear reactors cooled with supercritical water are presented together with a short history. The supercritical water-cooled CANDU ((CANada Deuterium Uranium) is a registered trademark of AECL) reactor concept is fully discussed. Also, thermophysical properties at critical and supercritical pressures as well as heat transfer and hydraulic resistance at these conditions are pr...

Sieve plates have an enormous impact on the efficiency of the phloem vascular system of plants, responsible for the distribution of photosynthetic products. These thin plates, which separate neighboring phloem cells, are perforated by a large number of tiny sieve pores and are believed to play a crucial role in protecting the phloem sap from intruding animals by blocking flow when the phloem ce...

Abstract In order to lower muzzle vibration, the major caliber gun reduced recoil resistance in in_bore period. When brake was designed, throttling area enlarged reduce hydraulic resistance. This made counterrecoil chamber (III chamber) unfilled beginning of recoil. middle recoil, III filled all a sudden. pressure working (I and increase sharply. According equation, Hydraulic equation set up wh...

Masks are the primary tool used to prevent spread of COVID-19 in current pandemic. Tests were carried out determine total pressure drop through materials from which masks made and correlation these results with concentration carbon dioxide inner space mask. The showed that a parameter representing hydraulic losses mask material has significant influence on higher resistances accumulated dioxide...

otal hydraulic resistance on an upland agricultural site may be influenced by several factors including standing vegetation. In this laboratory study, Darcy-Weisbach roughness coeflcients were measured for corn, cotton, sorghum, soybeans, sunflower, and wheat vegetation. Experimental variables used in this investigation in addition to crop type included plant population, row spacing, row orient...