Both manganese and rhenium complexes of the type [M(bipy)(CO)(3)(N-RIm)](+) (bipy=2,2'-bipyridine) undergo deprotonation of the central CH group of the N-alkylimidazole (N-RIm) ligand when treated with a strong base. However, the outcome of the reaction is very different for either metal. For Mn, the addition of the equimolar amount of an acid to the product of the deprotonation affords an N-he...

It was recently reported that CO hemoglobin is relatively more resistant than oxyhemoglobin to digestion by the pancreatic enzymes (l), and that a heme-protein fragment can be precipitated either from the digest solution or from the dialyzed digest by acidification with acetic acid (2). The composition of this CO product has now been investigated. Iron Content-The value of the iron to nitrogen ...

Bamboo-structured carbon nanotubes are grown on Co-Mo/MCM-41 catalyst in the temperature range of 873-973 K by thermal chemical vapor deposition of acetylene. This study shows that the purified carbon nanotubes have open tips and the metals of the catalyst are not encapsulated. Thus, the bamboo-structure seems to grow from the base. Pore size distribution of the product is quite narrow and ...

This report uses recent economic modelling to relate cognitive skills – as measured by PISA and other international instruments – to economic growth, demonstrating that relatively small improvements to labour force skills can largely impact the future well-being of a nation. The report also shows that it is the quality of learning outcomes, not the length of schooling, which makes the differenc...

Progressive evaluations by the Organization for Economic Co-operation and Development (OECD) demonstrate that health care is now or becoming unaffordable. This means nations must change the way they manage health care. The costly nature of health care in most nations, as a percentage of Gross Domestic Product (GDP) seems independent of the national funding models. Increasing evidence is demonst...

This paper discusses the validation, by simulation, of Behavioural Models of computer systems that are developed as part of a whole lifecycle approach to product development (model-based object oriented systems engineering (MOOSE)). The paper summarizes the MOOSE approach and introduces its notation for defining Behavioural Models, which are logical models of a system, uncommitted to hardware o...

The withdrawal of older workers from the labour force creates a variety of economic challenges, including an increase in unused production capacity. Costs due to early retirement measured in terms of forgone output averaged 6.3 per cent of potential gross domestic product in the OECD in 1998. These costs, which vary greatly from country to country, are highest in Hungary (15.9 per cent of poten...

BACKGROUND Over the last fifty years, the number of centenarians has dramatically increased. The centenarian rate (CR) is representative of the general longevity prevalent in a nation; it indicates the number of individuals aged 100 years or above at a given date divided by the size of the corresponding cohort of a given age. Two important attributes of the CR (50-54) are that it reflects both ...