Chemical-free products

A number of perfume-free products are readily available in supermarkets. This does not mean that, for example, a perfume-free laundry detergent is also chemical-free. You won t easily find 100 percent natural/organic laundry and personal care products in the supermarket. For chemical-free products, it s best to go to a natural products store. You can also find various options online. Also see www.the-abc-of-mcs.com under Products (online) or go to Part VI Further Resources. 

Natural-products stores also have various organic and chemical-free products. 

Specialty chemicals, however, differ in that they are used for thek performance properties and usuaHy are not specified chemical entities. Products from different suppHers usuaHy differ somewhat, and free interchangabHity is not always possible. Special chemical systems also exist in the market and these are formulated products that contain both commodity and specialty chemicals. 

The advantage of sol-gel technology is the ability to produce a highly pure y-alumina and zirconia membrane at medium temperatures, about 700 °C, with a uniform pore size distribution in a thin film. However, the membrane is sensitive to heat treatment, resulting in cracking on the film layer. A successful crack-free product was produced, but it needed special care and time for suitable heat curing. Only y-alumina membrane have the disadvantage of poor chemical and thermal stability. 

Lipid peroxidation is probably the most studied oxidative process in biological systems. At present, Medline cites about 30,000 publications on lipid peroxidation, but the total number of studies must be much more because Medline does not include publications before 1970. Most of the earlier studies are in vitro studies, in which lipid peroxidation is carried out in lipid suspensions, cellular organelles (mitochondria and microsomes), or cells and initiated by simple chemical free radical-produced systems (the Fenton reaction, ferrous ions + ascorbate, carbon tetrachloride, etc). In these in vitro experiments reaction products (mainly, malon-dialdehyde (MDA), lipid hydroperoxides, and diene conjugates) were analyzed by physicochemical methods (optical spectroscopy and later on, HPLC and EPR spectroscopies). These studies gave the important information concerning the mechanism of lipid peroxidation, the structures of reaction products, etc. 

Charbeneau, R. J., Wanakule, N., Chiang, C. Y., Nevin, J. R, and Klein, C. L., 1989, A Two-Layer Model to Simulate Floating Free Product Recovery Formulation and Applications In Proceedings of the National Water Well /Association and American Petroleum Institute Conference on Petroleum Hydrocarbons and Organic Chemicals in Ground Water Prevention, Detection and Restoration, November, pp. 333-345. 

Parker, J. C., Kaluarachchi, J. J., and Katyal, A. K, 1987, Areal Simulations of Free Product Recovery from a Gasoline Storage Tank Leak In Proceedings of the National Water Well Conference on Petroleum Hydrocarbons and Organic Chemicals in Groundwater, November, 1988, pp. 315-332. 

The basis of co-precipitation and adsorption methods for the purification of carrier-free radioisotopes is the use of a non-isotopic carrier for the required product. The carrier must behave chemically similar to the product in enough reactions to enable purification to be effective, its bulk being necessary for manipulation in precipitations. Its chemistry must be sufficiently different, however, to enable a simple separation of the carrier and carrier-free product to be obtained when a satisfactory purity of the radio-active material has been reached. A good example... 

CASRN 56-40-6 molecular formula C2H5NO2 FW 75.07 Chemical/Physical Products identified from the oxidation of glycine and OH radicals (generated from H2O2/UV) in oxygenated water were oxalic acid, formic acid, and ammonium ions. In oxygen-free water, oxalic and formic acids were not produced, i.e., glycine oxidized directly to ammonium ions. The rate constant for the reaction of OH radicals with the zwitterion ion is 1.7 X 10 /M-sec and with the anionic form is 1.9 x 10 /M-sec (Vel Leitner et al., 2002). 

Customer orientation and initial solution-free formulation of customers wishes, as an orientation for product development, appear to be promising approaches for innovations with regard to the application safety of chemicals-based products. However, the initiative for this is not mainly due to substance manufacturers, but rather to the chemicals users being close to the consumers. To what extent the commercial/industrial chemicals end-users (users of production auxiliary materials that are not included in the product) also transform the latent desire for application-safe products into effective demand behaviour, depends on other constellations of motives than those of private end-consumers. The employers liabihty insurance, chambers of commerce and industry, branch associations, trade unions and management boards of large-scale companies play a key role in making quality and competition effective as drivers for innovation here too. 

In situ oil skimmers are commercially available for the recovery of free product [i.e., light non-aqueous-phase liquids (LNAPLs) such as oil, grease, or other hydrocarbons] floating on the water table. Oil skimmers can be used alone or in conjunction with other remediation technologies, such as (in situ) soil vapor extraction, bioventing, or bioremediation, or (ex sim) membrane filters, coalescers, or chemical processes. The technology is implemented in sim by lowering the skimmers into wells located in the zone of contamination. 

While catalytic HDM results in a desirable, nearly metal-free product, the catalyst in the reactor is laden with metal sulfide deposits that eventually result in deactivation. Loss of catalyst activity is attributed to both the physical obstruction of the catalyst pellets pores by deposits and to the chemical contamination of the active catalytic sites by deposits. The radial metal deposit distribution in catalyst pellets is easily observed and understood in terms of the classic theory of diffusion and reaction in porous media. Application of the theory for the design and development of HDM and HDS catalysts has proved useful. Novel concepts and approaches to upgrading metal-laden heavy residua will require more information. However, detailed examination of the chemical and physical structure of the metal deposits is not possible because of current analytical limitations for microscopically complex and heterogeneous materials. Similarly, experimental methods that reveal the complexities of the fine structure of porous materials and theoretical methods to describe them are not yet... 

By then my whole family had changed their daily habits. From that moment on they only purchased organic products and only used chemical-free and perfume-free cleaning and care products. This also led to the creation of our family enterprise, Pure Nature (www.purenature.de). It began with a few products for ourselves and some fellow patients and grew into a company with over two thousand products and fourteen (part-time) employees, who in-... 

There are various laundry products available to MCS patients. Here, too, you should test things to see which products work for you. One person might do just fine with the brands Ecover and Seventh Generation, while other people will have to keep looking for other suitable detergents. The perfume-free laundry products from supermarkets are usually not chemical-free and are thus best avoided. In natural stores and various online shops you can find many different organic laundry detergents which are suitable for MCS patients. See www.the-abc-of-mcs.com under Products (Online), or see Part VI for many addresses. 

Out-gassing, also in this book referred to as airing out or off-gassing, is when new items release gases from the chemicals used in their production. New items are best allowed to gas out in a shed or storage area rather than in the main (chemical-free) house. 

Salt is a by-product. Due to the stability of the amide group, the free acid can be formed and separated from the reaction mixture to give a salt-free product. The stability of the amide group also allows sarcosinates to be used in a wider range of chemical environments than isethionates (see below). Sarcosinates are stable under moderately acidic conditions but will degrade at low pH or with elevated temperature. The surfactants are moderately soluble at high pH and the sodium salts are supplied as a 30% solution. 

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