The aim of this study was to determine the effect of uncontrolled environmental disposal of food supplements containing magnesium (Mg), chromium (Cr), iron (Fe) and zinc (Zn) on selected aquatic organisms including freshwater algae Scenedesmus subspicatus and Raphidocelis subcapitata, water flea Daphnia magna and duckweed Lemna minor. Thirty different food supplements containing Mg, Cr, Fe and ...

The effects of ultrasonic and thermo-chemical pre-treatments on the methane production potential of anaerobic co-digestion with synthetic kitchen waste (KW) or fat, oil and grease (FOG) were investigated. Non-linear regressions were fitted to accurately assess and compare the methane production from co-digestion under the various pre-treatment conditions and to achieve representative simulation...

References 1. Curry GR, White DN: Color coded ultrasonic differential velocity arterial scanner (Echoflow). Ultrasound Med Biol 4: 27-35, 1978 2. Barnes RW, Russell HE, Bone GE, Slaymaker EE: Doppler cere­ brovascular examination: Improved results with refinements in tech­ nique. Stroke 8: 468-71, 1977 3. Gee W, Mehigan JT, Wylie EJ: Measurement of collateral cerebral hemispheric blood pressure...

ABSTRACT The prototype superconducting cavity system for CESRPhase III was tested in CESR in August 1994. The performance of the system was very gratifying. The cavity operated gradients of 4.5-6 MV/m and accelerated beam currents up to 220 mA. This current is a factor of 3 above the world record 67 mA for SRF[1]. The high circulating beam current did not increase the heat load or present any d...

The main objective of this study is to discuss the economical and the environmental analysis of a net zero energy (NZE) tourist village in Alexandria, Egypt, by maximizing the renewable energy fraction and minimizing the greenhouse gases (GHG) emissions. The hybrid photovoltaics (PV)/wind/diesel/battery system is found to be the optimum hybrid renewable energy system (HRES) for the proposed tou...

Abstract: In this study, the design and simulation of a combination of a photovoltaic (PV) array with an alkaline electrolyzer is performed to maximize the production of hydrogen as a reliable power resource. Detailed electrical model of PV system, as long as thermal and electrochemical model of electrolyzer is used. Since an electrolyzer is a non-linear load, its coupling with PV systems to ge...

Renewable energies are increasingly seen as the best solution to a growing global population demanding affordable access to electricity while reducing the need for fossil fuels. Country of Iran has vast untapped solar, wind, geothermal, and hydroelectric sources that hold the potential to meet domestic needs. Renewable energy is also essential to Iran as it will curb massive air pollution. In t...

Full-depth velocity and density profiles taken along the 3000-m isobath characterize the semidiurnal internal tide and bottom-intensified turbulence along the Hawaiian Ridge. Observations reveal baroclinic energy fluxes of 21 5 kW m 1 radiating from French Frigate Shoals, 17 2.5 kW m 1 from Kauai Channel west of Oahu, and 13 3.5 kW m 1 from west of Nihoa Island. Weaker fluxes of 1–4 2 kW m 1 ra...

A stand-alone system is defined as an autonomous system that supplies electricity without being connected to the electric grid. Hybrid systems combined renewable energy source, that are never depleted (such solar (photovoltaic (PV)), wind, hydroelectric, etc.) , With other sources of energy, like Diesel. If these hybrid systems are optimally designed, they can be more cost effective and reliabl...

References 1. Curry GR, White DN: Color coded ultrasonic differential velocity arterial scanner (Echoflow). Ultrasound Med Biol 4: 27-35, 1978 2. Barnes RW, Russell HE, Bone GE, Slaymaker EE: Doppler cere­ brovascular examination: Improved results with refinements in tech­ nique. Stroke 8: 468-71, 1977 3. Gee W, Mehigan JT, Wylie EJ: Measurement of collateral cerebral hemispheric blood pressure...