نتایج جستجو برای: volume concentration
تعداد نتایج: 674727 فیلتر نتایج به سال:
چکیده ندارد.
abstract sensitive and precise voltammetric methods for the determination of trace amounts of furaldehydes, mainly as furfural (f) and 5-hydroxymethyl-2-furaldehyde (hmf), in waste waters and other matrices is described. determination of total furaldehyde at < ?g g-1 levels in alkaline buffered aqueous media was individually investigated. by the use of ordinary swv and adsorptive square wave ...
Background and Objectives: Red beet juice, a potential source of valuable nutrients, is widely used as a colorant in food industries. In recent years, to avoid reduction of nutritional values of the red beet during concentration by thermal processing, an osmotic distillation (OD) technique has been suggested. Therefore, the major aim of the present study was to investigate effects of the flow r...
A heat exchanger using nanofluid needs to operate at optimum mass concentration level to get the maximum heat transfer performance. A numerical analysis is performed on the heat transfer and pressure drop of water-based γ-Al2O3 nanofluid gasketed-plate heat exchanger to specify its optimum conditions. Cold water will be heated by γ-Al2O3/water nanofluid. The results showed that optimal volume c...
Nanofluid is a suspension obtained by adding nanoscale particles (100 nm) to a base fluid to improve heat transfer. In this study, the effect of temperature and concentration of nanoparticles consisting of Alumina nanoparticles and Graphene nanosheets on the thermal conductivity of a base fluid consisting of water and ethylene glycol was studied. Also, 0.2% by volume of oleic acid (OA) and 0.2%...
Saharan dust contribution to the Caribbean summertime boundary layer – a lidar study during SALTRACE
Dual-wavelength lidar measurements with the small lidar system POLIS of the Ludwig-MaximiliansUniversität München were performed during the SALTRACE experiment at Barbados in June and July 2013. Based on high-accuracy measurements of the linear depolarization ratio down to about 200 m above ground level, the dust volume fraction and the dust mass concentration within the convective marine bound...
We separated platelets from whole blood and incorporated them into In-Ill and Te-99m agents. Sn-GHA, Tropolone, Oxine (sulphate) and HMPAO were used to diffuse radionuclides into the platelets. The effects of time, temperature, PH of incubation media; volume and concentration of ionophore; and volume and activity of ln-l 13m C13 and Te-99m on labeling efficiency were studied.
Background. This study evaluated the role of changes in heart rate, atrial pressure, volume, and cardiac tissue atrial natriuretic factor (ANF) concentration in the modulation of plasma ANF concentration in a model of pacing-induced heart failure. Methods and Results. The effects of acute right ventricular pacing (250 beats/min), acute volume expansion (35 ml/mmn), and volume expansion after 1 ...
BACKGROUND AND OBJECTIVES Ultrasound guidance reduces the required local anesthetic volume for successful peripheral nerve block, but it is unclear whether this influences block duration. We investigated the ropivacaine volume and concentration effect on interscalene block duration. METHODS One hundred eighty-five patients were randomized to 5 ropivacaine volume/concentration combinations (0....
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