goldfish carassius auratus were subjected to either formalin (250 ppm) or nacl (10 ppt), over a 0.5-h period followed by 24-h freshwater exposure. serum biochemistry was monitored before exposure (0), immediately after (0.5) plus 3 and 24 h after exposure. results showed that both formalin and nacl treatments caused rapid increase in cortisol with a peak at 3 h, which did not recover until 24 h...

Oscillatory density profiles (layers) have previously been observed at the free surfaces of liquid metals but not in other isotropic liquids. We have used x-ray reflectivity to study a molecular liquid, tetrakis(2-ethylhexoxy)silane. When cooled to T/Tc approximately 0.25 (well above the freezing point for this liquid), density oscillations appear at the surface. Lateral order within the layers...

Assigning effective atomic charges that properly reproduce the electrostatic fields of molecules is a crucial step in the construction of accurate interatomic potentials. We propose a new approach to calculate these charges, which as previous approaches are, is based on the idea of charge equilibration. However, we only allow charge to flow between covalently bonded neighbors by using the conce...

Nonmetallic inclusions are well known to influence product quality and process stability in the production of steel. A step that is very sensitive presence nonmetallic inclusion (NMI) continuous casting. Here, so-called clogging phenomenon can occur, resulting a distinct disruption casting decreased steel quality. The considerably contributes build-up deposits submerged entry nozzle provoking i...

This Article explores the idea of using nonmetallic contacts for molecular electronics. Metal-free, all-carbon molecular electronic junctions were fabricated by orienting a layer of organic molecules between two carbon conductors with high yield (>90%) and good reproducibility (rsd of current density at 0.5 V <30%). These all-carbon devices exhibit current density-voltage (J-V) behavior simila...

"Catching" metals in the nonmetallic form in solution, as they grow to bulk, is one of the most exciting areas of contemporary materials research. A new kind of stabilization to catch the nonmetallic form of noble metals with small thiols has evolved as an exciting area of synthesis during the past decade. Gold clusters stay in the frontline of this research, yielding new "molecules" composed o...

Material stocks are an important part of the social metabolism. Owing to long service lifetimes of stocks, they not only shape resource flows during construction, but also during use, maintenance, and at the end of their useful lifetime. This makes them an important topic for sustainable development. In this work, a model of stocks and flows for nonmetallic minerals in residential buildings, ro...