Active paste

These products are marketed under the trade name Hostapur. Hostapur SAS 60, a 60% active paste, is used at low levels ia some European Hquid hand-dishwashing products. 

Schipper, L., and Meyers, S. (1992). Energy Efficiency and Human Activity Past Trends, Future Prospects. New York Cambridge University Press. 

Next, the dilution product is allowed to separate into two phases and the lower, aqueous acid layer is removed as spent acid. Much of the color produced during the sulfonation is contained in the spent acid. The upper layer in the separator, which contains around 90% alkylbenzenesulfonic acid (the remainder being primarily dissolved sulfuric acid), is also removed from the separator and neutralized with sodium hydroxide solution or with sodium carbonate solution to yield the active paste. When sodium hydroxide is used a considerable amount of heat must be removed. This is done in the third loop reactor of this process, the neutralization heat exchanger (also known as the neutralizer). If sodium carbonate solution is used, the neutralization is much less exothermic and no heat exchanger is needed at this stage. 

The active paste has a typical composition of 40-50% AM (active matter), 5-9% sodium sulfate, and <1% unsulfonated organic material (free oil). Pastes from oleum sulfonation do not require bleaching. 

Two writing conventions apply to the Methods section as a whole the use of tense (past or present) and voice (passive or active). Past tense and passive voice predominate in the Methods section however, in some cases, present tense and/ or active voice are also used. Like other writing conventions, the proper use of tense and voice reveals authors familiarity with the expectations of the held, their objectivity, and more expert-like writing abilities. 

Gerth, K., Pradella, S., Perlova, O., Beyer, S., and Muller, R. 2003. Myxobacteria proficient producer of novel natural products with various biological activities-past and future biotechnological aspects with the focus on the genus Sorangium. J. Bio-technol., 106(2-3), 233-253. 

Clearly, the current collector must be stable to chemical attack by both electrolyte and active material and this limits the choice of material, e.g. lead is the only widely used material in a lead/acid battery. Corrosion of the collector and shedding of the active paste are the two major causes of battery failure. 

The selection of the electrolyte is determined by the electrode reactions and its concentration is also important. This will control the plate potentials, the electrolyte resistance and viscosity and, by its effect on the rate of diffusion, the differences in concentrations of species between the inside and the outside of the pores of the active paste. 

In addition to non-ciystalline phases some ciystalline phases may also be formed in the hydration process. According to Shi (1997), in mixes made with NaOH as activator the phases C AHjj and C,ASHg (stratlingite) may be formed in the presence of Na COj the catboaluminate C aCh is formed, and C AHjj may be formed in sodium siUcate activated pastes. 

Dichlorobenzoyl peroxide n. A cross-linking agent for silicone elastomers. It is sold as a 40% active paste dispersed in silicone fluid (Candox ). 

All these factors make the rainwater which infiltrates and circulates through the chalk massif not to be capable of reproducing or activating past karst dynamics. This is true only when human action does not alter the conditions of balance of the surroundings. 

Fiber samples from the washing model were also tested for antibiotic release in a zone of inhibition assay. One cm pieces of polyester were washed for various times (with buffer changes as outlined previously), sterilized, and then plated on agar streaked with S. aureus (ATCC 29213). The zone of inhibition was measured after an overnight incubation. The control sample lost antimicrobial activity within 48 hours, while the pad/heat treated polyester continued to demonstrate anti-staphylococcal activity past 336 hours (Figure 10). 

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