APCs

Yarnelle, M. K. West, K. J. Modification of an Ultraviolet Spectrophotometric Determination of the Active Ingredients in APC Tablets, /. Chem. Educ. 1989, 66, 601-602. 

The analysis of APC tablets (a mixture of aspirin, phenacetin, and caffeine) has been a common undergraduate laboratory experiment. This experiment describes modifications to the standard analysis for APC tablets in which paracetamol (also known as acetaminophen) replaces phenacetin. 

Table 5. Values of the Diffusion Coefficient and of M-c/T Apc Various Gases in Air at 0°C and at Atmospheric Pressure ...

FIG. 9-1 Relationship between annual costs, annual profits, and cash flows for a project. A d — annual depreciation allowance Acf — annual net cash flow after tax Ac/ = annual cash income Age = annual general expense Aqp = annual gross profit A/r = annual tax A e = annual manufacturing cost Avc/ = annual net cash income Avvp = annual net profit after taxes A/ p = annual net profit As = annual sales Apc = annual total cost (DCFRR) = discoiinted-cash-flow rate of return (NPV) = net present value. 

In addition to using annuahzed cost comparisons in evaluating an air-poUution-control (APC) equipment installation, the impact of the 1990 Clean Air Act Amendments (CAAA) and resulting regulations also must be included in the evaluation. The CAAA prescribes specific pollution-control requirements for particular industries and locations. As an example, the CAAA requires that any major stationary source or... 

Preconditioning for Particulates Heavy particulate loading of the inlet gas with dust, grease, oils, or other aerosols can be very dam-aging to the pore structure of the filter bed, resulting in an eventual pressure-drop increase. Oils and heavy metals that are deposited on the filter bed can be poisonous to the microorganisms that live within the biofilm. Particulate APC equipment such as fabric filters and venturi scrubbers are generally adequate for this level of particulate removal. 

Humidification of the gas stream is the preferred method of keeping the filter bed moist. Gas moisture is usually added to the incoming gas stream downstream of the particulate removal APC equipment by either water sprays or steam. Adding moisture directly to the top of the bed in order to maintain filter media moisture is not recommended since this can result in (I) locahzed drying of the substrate, and (2) cold water addition will reduce the ac tivity of the microorganisms until the water becomes warmed to the steady-state filter ed temperature. 

Surface treatment of the composite can have a significant effect on adhesion. Surface treatment enhances one or more of the mechanisms described previously. Wu et al. [15] studied the effects of surface treatment on adhesive bonding for AS-4/APC-2 laminates. They found that the greatest bond strength was achieved from acid etching and plasma etching the composite surface. Table 1 summarizes the various surface treatments that were evaluated. 

Effects of various surface treatments on AS-4/APC-2 laminate for adhesive bonding [15]... 

APC-2 = a polyetheretherketone, thermoplastic polymer matrix from ICl Fiberite,... 

All AS-4/APC-2 surfaces were cleaned with SCOTCH-BRITE and BON AMI before the surface treatment. 

American Petrofina, See TotalFinaElf (France), 216 American Petroleum Institute (API), 268 American Plastics Council (APC), 268 American Polyolefin Association, Inc. (APA), 268 American Samoa Environmental Protection Agency, 289 American Society for Biochemistry and Molecular Biology (ASBMB), 268... 

Asalii Organic Chemicals Industry Co. Ltd., 182 Asalii-Pemi Chemical Co. Ltd. (APC), 181, 182 Asarco (US), 193 Asarco, 218 Asbestos, 20... 

This drug is quite frequently found in headache remedies in com-liination with aspirin and caffeine (APC , PAG ). Although the iniline derivatives show analgetic potency comparable to aspirin,... 

APc = pressure drop across control valve F i = friction pressure drop at maximum flow rate, psi... 

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