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Schrauwers, A. (author)The Netherlands is having trouble with the EU standards for respirable dust (PM 10). The Dutch Council of State recently blocked a number of residential development projects because local conditions failed to meet the PM 10 standard. Research by the Nano Structured Materials group at TU Delft shows that some 5% of the seven or so million motor...journal article 2006
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Schrauwers, A. (author)When you mix two diff erent liquids, two things can happen. They either mix down to the molecular level (like water and alcohol),or they dont (like oil and water), and instead form minute droplets that coexist. If such a mixture is left alone, the lighter of the two liquids will eventually fl oat to the top, and the heavier liquid will sink to...journal article 2005
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Schrauwers, A. (author)For over two decades, fruit and other agricultural products have been sorted using the 'electronic eye'. The eye selects purely by such external properties as colour, and cannot judge taste. Dr Gerrit Polder, an electrical engineer at Wageningen University, carried out his doctorate research at Delft University of Technology laying the...journal article 2005
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Schrauwers, A. (author)Is it possible to make platinum particles with a diameter of less than eight nanometres? That was the question Jan Marijnissen at the aerosol lab of Delft ChemTech was asked. Together with graduate student Jan van Erven, the famous aerosol expert Sheldon Friedlander of the University of California (UCLA), and the University of Karlsruhe, Germany...journal article 2005
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Schrauwers, A. (author)Fluidised bed reactors are in common use in the chemical industry and for generating electricity. A relatively recent application is the combustion of biomass to produce what is called Green Power. The thing about fluidised bed reactors is that they can be used in a wide range of production processes and they have excellent heat transmission.In...journal article 2004
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Schrauwers, A. (author)Hydrogen is considered to be a highly promising energy carrier. Nonetheless, before hydrogen can become the fuel of choice for the future a number of slight problems will have to be overcome. For example, how can hydrogen be safely stored? Motor vehicles running on hydrogen may be clean in concept but where can we put the hydrogen? For many...journal article 2004
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Schrauwers, A. (author)Steel is a difficult material, or rather, it tends to guard its secrets jealously. At the Interfaculty Reactor Institute (iri) and the subfaculty of Materials Science and Engineering at TU Delft, Dr. ir. Erik Offerman is doing his utmost to get to the bottom of this enigma. His endeavours even required the support of the synchrotron of the...journal article 2004
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Schrauwers, A. (author)Each year in the Netherlands alone, some 8,000 tons of pesticides are sprayed onto crops. Some of this is used inside greenhouses, on plants, flowers, and fruit. The problem with spraying is that a large part of the pesticide, something like 80%, ends up anywhere but on the plant. This is not only a waste of material, it also puts the...journal article 2003
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Schrauwers, A. (author)Apart from oil, coffee is the worlds most important export product. The large-scale intensive coffee plantations are also one of the worlds biggest users of pesticides. But cautious signs are emerging of return to the traditional, practically pesticide-free, organic growing methods, a trend that started in 1972 with the foundation of the...journal article 2003
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Schrauwers, A. (author)Microorganisms will eventually settle on anything,living or dead. Its a simple fact of life. In most cases there is no problem, the microbes are simply part of the greater ecosystem, but in others, bacteria on and in the human body become a nuisance, sometimes with disastrous consequences. Examples include dental plaque, as well as marine and...journal article 2003
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Schrauwers, A. (author)Mud and shipping dont mix. Silted-up waterways must be dredged, which costs money. Even so, the behaviour of sand in water systems has been the subject of many studies, whereas mud has remained the great unknown. Geographer Ankie Bruens dived in to gain insight into the matter.journal article 2003
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Schrauwers, A. (author)How do I get the best value for money? This is a question that has been on practically every persons mind at one time or another, but finding the answer is not so simple for large technical systems, and is becoming increasingly difficult as the technical complexity of such systems increases. The purchase price of a frigate, an aircraft, or...journal article 2002
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- Schrauwers, A. (author) journal article 2001
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- Schrauwers, A. (author) journal article 2001
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Schrauwers, A. (author)Silicon dioxide, in other words sand, turns out to be a highly useful helper for arc welding processes. It can be used as a tracer for a welding robot to follow the weld line and it can also make welding go faster and "deeper". At the Materials Science department of the Delft University of Technology, chemical engineer Wilma Middel looked into...journal article 2001
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Schrauwers, A. (author)Dr.Ir. Jan Marijnissen, particle technologist with TU Delfts Chemical Technology section, has been busy developing a particle sensor for fourteen years now. Suddenly his work has become more topical than ever in the wake of the terrorist attacks in the States. A chemical particle sensor has meanwhile been launched on the market, and now the...journal article 2001
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Schrauwers, A. (author)Waste separation has never been easy, but the increasing need to recycle materials has made it an economic necessity to rid useful components of any undesirable or even harmful ingredients. Just a handful of pottery shards in a mountain of recycled glass can have disastrous consequences for the finished glass product. Raw materials technologists...journal article 2001
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- Schrauwers, A. (author) journal article 2000
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- Schrauwers, A. (author) journal article 1999
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- Schrauwers, A. (author) journal article 1999