Odorants controlled presentation

At present, chlorine dioxide is primarily used as a bleaching chemical in the pulp and paper industry. It is also used in large amounts by the textile industry, as well as for the aching of flour, fats, oils, and waxes. In treating drinking water, chlorine dioxide is used in this country for taste and odor control, decolorization, disinfection, provision of residual disinfectant in water distribution systems, and oxidation of iron, manganese, and organics. The principal use of chlorine dioxide in the United States is for the removal of taste and odor caused by phenolic compounds in raw water supplies. 

Leonardos, G., Kendall, D.A., and Barnard, N.J. 1968. Odor threshold determinations of 53 odorant chemicals. Presented at the 61th Annual Meeting of die Air Pollution Control Association, St Paul, Minn., June 23—27. [Requested. NIOSH, 1976, page 29]... 

In some applications of the lamp, it was soon discovered that a controlled amount of ozone, together with the bactericidal radiation, resulted in a more effective method of destroying microorganisms. Ozone also oxidized many of the odors. The present survey describes only those applications of the Sterilamp tube which utilize lamps generating a controlled amount of ozone to destroy mold, bacteria, and odors. 

For wastewater treatment, the recommended chlorine dosage for disinfection purposes should produce a chlorine residual of 0.5-1 mg/L after a specified contact time. Effective contact time of not less than 15 min at peak flow is recommended. Practical chlorine dosages recommended for wastewater disinfection and odor control are presented in below ... 

Fecal material from captive rabbits and foxes was collected within one hour of excretion and frozen until required. Rabbits were maintained on a standard laboratory rabbit diet (Economy Rabbit Diet Special Diet Services Witham, Essex, UK). Foxes were maintained on a diet of rodents, chicks and rabbits. Approximately Ig of fecal material was defrosted on ice as required and smeared onto a 2cm piece of plastic-backed card (BenchGuard Bibby Sterilin Ltd, Staffs, UK) which was placed in nest boxes during trials. Distilled water was used as a non-odor control and was presented as lOOpl spots of distilled water on a 2cm piece of BenchGuard. 

More recently, a research group from Thailand screened a variety of EOs used in aromatherapy for their effects on electrical brain activity and mood after inhalation. All experiments were conducted in healthy human subjects and employed the same ABC design, that is, a no-odor control condition (A) was followed by a condition (B) in which a carrier oil without EO was presented and nally by the experimental condition (C) in which the EO of interest diluted in the carrier was administered. The EOs under study were jasmine (Sayowan et al. 2013), rosemary (Sayorwan et al. 2013), citronella (Sayowan et al. 2012), and lavender (Sayorwan et al. 2012a,b). In light of the... 

The following examples are hazardous chemicals that are used in water utilities for softening, disinfection, coagulation, scale and corrosion control, taste and odor control, and prophylaxis. The information presented includes health effects, storing, handling, labeling, first aid, fire control, and others. Similar information on other chemicals can be found on their MSDS. Many chemicals have more than one name and the only sure way to identify a chemical is by its Chemical Abstracts Service number (CAS). 

Rabosky, J. G., and Matta, S. R, 1985, Effective Odor Control with Granular Activated Carbon Systems, presented at the 57th Annual Conference of the Water Pollution Control Association of Pennsylvania, Aug. 7-9. 

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