TPQ

The Superfund Amendments and Reauthorization Act of 1986 (SARA) Tide III requires emergency planning based on threshold planning quantities (TPQ) and release reporting based on RQs in 40 CER part 355 (used for SARA 302, 303, and 304). The TPQ for acrolein is 500 lb (227 kg), and its RQ is 1 lb (0.454 kg). SARA also requires submission of aimual reports of release of toxic chemicals that appear on the Hst in 40 CER 372.65 (for SARA 313). Acrolein appears on that Hst. This information must be included in all MSDSs that are copied and distributed for acrolein. 

Assume that the motor is designed for an average speedup torque of 135% and TpQ of 220% (Figure 7.21). If the average load torque is assumed as 68%, the average accelerating torque, 7, available will be 67% on DOL starting, i.e. 

J TPQ Is revised to Its calculated value and does not change due to technical review as In proposed nile. k The TPQ was revised after proposal due lo calculaUon enor. 

This material is a reaetive solid. The TPQ does not default to 10,000 pounds for non-powder, non-molten, non-solution form. 

The ealeulated TPQ clumged after teelinieal review as deseribed in tlie teelmieal support doeument. 

The deamination of primary amines such as phenylethylamine by Escherichia coli (Cooper et al. 1992) and Klebsiella oxytoca (Flacisalihoglu et al. 1997) is carried out by an oxidase. This contains copper and topaquinone (TPQ), which is produced from tyrosine by dioxygenation. TPQ is reduced to an aminoquinol that in the form of a Cu(l) radical reacts with O2 to form H2O2, Cu(ll), and the imine. The mechanism has been elucidated (Wihnot et al. 1999), and involves formation of a Schiff base followed by hydrolysis in reactions that are formally analogous to those involved in pyridoxal-mediated transamination. 

Scheme 1 SSAO/VAP-1 TPQ-catalyzed amine oxidase mechanism.

Tris(phenylquinoxaline) compounds containing two imine nitrogens on a phenyl ring, possess high EA (2.6-2.8 eV), high mobility (10-4 cm2/(V s) at 106 V/cm), and good thermal stability. Star-shaped TPQ (91) was investigated for application as an ETM in a PPV-based... 

Pretreatment Standards for New Sources REL = Recommended Exposure Level RfD = Reference Dose TLV = Threshold Limit Value TPQ = Threshold Planning Quantity TWA = Time- Weighted Average WHO =... 

A trihydroxyphenylalanyl residue (symbolized TPQ) that plays an essential cofactor role in catalysis of amine oxidases that use molecular oxygen and copper ions. 

Copper-containing amine oxidases (non-blue copper proteins) catalyze the oxidative deamination of primary amines to the corresponding aldehydes with the release of ammonia and concomitant reduction of oxygen to hydrogen peroxide. They typically use a quinone redox cofactor [topaquinone (TPQ)], which is bound covalently in the active site, and are thought to form a Cu(I)-TPQ semi-quinone radical intermediate during the redox reaction [13]. 

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