The global descriptors of chemical activity: ionization potential IP, electron affinity EA, ?, absolute electronegativity ?, molecular hardness ? and softness S, electrophilicity index ? for cyanides X(CN)k with X=H, Na, K, Ag, Cu, Ca, Hg, Cd, Zn in the gas phase water medium have been determined by taking advantage quantum-chemical computations. To this aim, HOMO LUMO energy levels were calcul...

OBJECTIVE Hazmat disaster preparedness is critical, especially as Hong Kong prepares for major international events, such as the 2008 Olympic Equestrian Games. No published medical study describes the identities and quantities of hazardous materials (HMs) in Hong Kong and lists what antidotes are needed for these dangerous goods (DGs). This study describes what HMs are most common in Hong Kong ...

Recent microwave experiments [I] have shown that potassium cyamde has a triangular shape. This finding has been supported by ab initio SCF calculations [I-4]. Tbe ab initio calculations predict that sodium cyanide is also triangular [3,4] _ Lithium cyanide, on the other hand, is predicted to be linear and to have an isocyanide structure [5,6]. Numerous calculations [6-I I] agree that hydrogen c...

Effects of cassava (Munihot escuknta Crantz)-borne organic cyanide and inorganic cyanide in the form of sodium cyanide on bone and muscle development were investigated in eighteen dogs of Nigerian breed. After 16 weeks of stabilization in the laboratory from the time of purchase when the dogs were fed on the same diet, they were randomly assigned to three experimental groups of six dogs each. T...

Layered copper-nickel cyanide, CuNi(CN)4, a 2-D negative thermal expansion material, is one of a series of copper(ii)-containing cyanides derived from Ni(CN)2. In CuNi(CN)4, unlike in Ni(CN)2, the cyanide groups are ordered generating square-planar Ni(CN)4 and Cu(NC)4 units. The adoption of square-planar geometry by Cu(ii) in an extended solid is very unusual.

An Adsorbent based treatment system is presented for toxic metal removal from rinsewater streams. The adsorbent is a Mg-A1 oxide anion exchange material with high capacity (approaching 5.5 meq/g) and strong selectivity for difficult to treat species such as Electroless plating metal chelates, Fixed Cyanides and chrome conversion solutions. Data is presented describing treatment of various metal...

In 1932 Marine, Raumann, Spence, and Cipra (1) discovered that administration of cyanides to rabbits will usually lead to thyroid hyperplasia. As one phase of our study of the mechanism of this phenomenon we have investigated the fate of several cyanides given to normal and thyroidectomized rabbits with the results presented in this paper. Lang (2) first showed that 12 to 17 per cent of adminis...

This paper addresses the issue of polishing electroplating wastewater in subsurface vertical flow constructed wetland. Electroplating wastewater treatment or polishing in constructed wetlands (CWs) was studied to a very limited degree. Four types of microcosm upflow constructed wetlands were selected for the experiment based on type of bed media and the presence or absence of vegetation (Phragm...