Lego system

In the USA, the toy industry has decided not to disclose what chemicals are used in its products - a move which is against the hopes of Environmental Defense of New York, a group who believes that companies should disclose this information so that the public can make informed choices. Details of the debate are recorded here. ENVIRONMENTAL DEFENSE TOY INDUSTRY ASSOCIATION US,CONSUMER PRODUCT SAFETY COMMISSION US,ENVIRONMENTAL PROTECTION AGENCY MATTEL INC. HASBRO INC. LEGO SYSTEMS INC. AMERICAN CHEMISTRY COUNCIL US,GOVERNMENT TOY MANUFACTURERS OF AMERICA INC. 

Lohmeijer BGG, Schubert US (2004) Expanding the supramolecular polymer LEGO system nitroxide mediated living free radical polymerization for metallo-supramolecular block copolymers with a polystyrene block. J Polym Sci Part A Polym Chem 42 4016-4027... 

Several examples of a new and simple "LEGO" system to obtain thienyl substituted 2,6-oligopyridines <99T5047>, 4-stannyl-, 4-bromo-oligopyridines and branched oligopyridines <99T5067>, staimylated bipyridines and terpyridines <99EJOC313> from... 

Figure 3.6. Polyketlde chains use an iterative process akin to the fatty acid chain elongation process. However, an extra layer of chemical diversity can be generated by feeding different starter units into the system consequently, the polyketlde biosynthetic system has been compared to a Lego system where a few modules can be joined together in many different ways.

Multiple reports have described the construction of a wide variety of oligopyridines that are multifunctional with a diversity of utilities [97]. These include a LEGO system that has led to the construction of branched frameworks that contain up to 14 pyridine rings. The transformation of 269 and 270 into 271 provides a representative example. 

Lohmeijer, B.G.G., Wouters, D., Yin, Z. and Schubert, U.S. (2004) Block copolymer libraries modular versatility of the macromolecular lego systems. Chem. Commun., 24,2886-2887. 

Lego is a trade-mark of LEGO System A/S, DK 71000 Billund, Denmark. 

Proprietary systems are available employing Lego type blocks which can be constructed and placed on a baseboard to represent a three-dimensional visualization of the layout. Another system employs aluminum castings of the actual items of equipment and operatives. Cardboard cutouts have been the most commonly used method, particularly with those who rarely plan layouts. 

Modulux Systems Ltd, Northampton Lego symbolic constructions on a flat baseboard. 

The bottom up approach ensures the quality of the end result by building up from the foundations rather like a Lego model. In testing terms this is illustrated in Figure 7. These Lego bricks are equivalent to the individual modules in any measurement system. Each brick is qualified or confirmed as suitable for use before the next layer is built. In this way, integrity is assured all the way to the... 

The system is irreducible, not the parts. By Miller s reasoning you couldn t distinguish between a jumbled pile of Lego parts and an elaborately designed Lego machine. Apparently they would both look the same to him. 

FIGURE 2.5 A flow injection system for the potentiometric determination of ammonium in Kjeldahl plant digests used in Brazil in 1976. The flow setup is supported by LEGO blocks and includes a needleless syringes for manual sample injection, an air-gap ammonium electrode (in white), a model 8511 Polymetron peristaltic pump and a model 64 Radiometer pH meter (recorder not shown). For experimental details, see Ref. [43],... 

Detection of a target analyte may be tedious with GC-SIM because signal interference may conceal the signal. A method for mass spectrum extraction of GC-MS data has been incorporated into an automated software program developed by the National Institute of Standards, called Automated Mass Spectral Deconvolution and Identification system (AMDIS). The LEGO corporation has also developed a software program used to resolve overlapped signals from GC-TOF-MS. 

Interface tools. The computer is a powerful aide Tor investigations when interfaced so that it can control and measure the environment. Microcomputer-based labs (MBL) and interfaces to mechanical systems like LEGO/Logo and the Capsela IR link allow students to record easily a wide range of phenomena and control the conditions under which these measurements are made. 

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