1.3- Propanesulfone

Kawahara et aL [58] produced a propylsulfonated-PBI (PBI-PrS) via a ringopening reaction of 1,3-propanesulfone with the N - H groups of the imida-... 

Polyfluorovinyl ethers form unstable (i-sultones with sulfur trioxide The p sultones isomerize at 25 °C to give p carbonylsulfonate esters and acids [16, 17 The reaction of sulfur trioxide with ethyl pentafluoroisopropenyl ether to furnish 2-ketopentafluoropropanesulfonic acid and ethyl 2-ketopentafluoro-propanesulfonate is an example (equation 7)... 

The GBR resin works well for nonionic and certain ionic polymers such as various native and derivatized starches, including sodium carboxymethylcel-lulose, methylcellulose, dextrans, carrageenans, hydroxypropyl methylcellu-lose, cellulose sulfate, and pullulans. GBR columns can be used in virtually any solvent or mixture of solvents from hexane to 1 M NaOH as long as they are miscible. Using sulfonated PDVB gels, mixtures of methanol and 0.1 M Na acetate will run many polar ionic-type polymers such as poly-2-acrylamido-2-methyl-l-propanesulfonic acid, polystyrene sulfonic acids, and poly aniline/ polystyrene sulfonic acid. Sulfonated columns can also be used with water glacial acetic acid mixtures, typically 90/10 (v/v). Polyacrylic acids run well on sulfonated gels in 0.2 M NaAc, pH 7.75. 

Sample Polyaniline/Polyacrylamldo-2-Methyl-1 Propanesulfonic Acid... 

Figure 2 Stability of /3-poly(L-malate) measured by its activity to inhibit purified DNA polymerase a of P. polyceph-alum. The relative degree of inhibition is shown (100 rel. units refer to complete inhibition). The DNA polymerase assay was carried out in the presence of 5 /tg/ml /S-poly(L-malate) as described [4]. The polymer was preincubated for 7 days at 4°C in the following buffer solutions (50 mM) KCl/HCl (—A—). Citrate (—V—). 2-(A/-Morpholino)-ethanesulfonic acid, sodium salt (—O—). Sodium phosphate (— —). N-(2-Hydroxyethyl)piperazine-N -(2-ethanesul-fonic acid), sodium salt (— — ). N,N-b s (2-Hydroxyethyl)-glycine, sodium salt (—T—). Tris/HCl (— —). 3-(Cyclo-hexylamino)-l-propanesulfonic acid, sodium salt (— —).

The bioluminescence spectrum of P. stipticus and the fluorescence and chemiluminescence spectra of PM are shown in Fig. 9.7. The fluorescence emission maximum of PM-2 (525 nm) is very close to the bioluminescence emission maximum (530 nm), but the chemiluminescence emission maximum in the presence of a cationic surfactant CTAB (480 nm) differs significantly. However, upon replacing the CTAB with the zwitter-ionic surfactant SB3-12 (3-dodecyldimethylammonio-propanesulfonate), the chemiluminescence spectrum splits into two peaks, 493 nm and 530 nm, of which the latter peak coincides with the emission maximum of the bioluminescence. When PM-1 is heated at 90°C for 3 hr in water containing 10% methanol, about 50% of PM-1 is converted to a new compound that can be isolated by HPLC the chemiluminescence spectrum of this compound in the presence of SB3-12 (curve 5, Fig. 9.7) is practically identical with the bioluminescence spectrum. 

Fig. 9.7 Bioluminescence of Panellus stipticus fruiting body (1) fluorescence of PM-2 in the presence of CTAB upon excitation at 440 nm (2) chemiluminescence of PM-2 in the presence of CTAB (3) chemiluminescence of PM-2 in the presence of 3-(dodecyldimethylammonio)propanesulfonate (SB3-12) (4) and chemiluminescence of the hot-water treatment product of PM-1 in the presence of SB3-12 (5). Curves 2-5 were measured in 2 ml of 50 mM Tris-HCl buffer (pH 8.0) containing 0.18 mM EDTA. Chemiluminescence was elicited by the addition of 5 p.1 of 50 mM FeSC>4 and 10 xl of 10% H2O2. From Shimomura, 1991b, with permission from Oxford University Press.

N-Morpholino)propanesulfonic acid Relative molecular weight (dimensionless number) Nicotine amide adenine dinucleotide, oxidized form Nicotine amide adenine dinucleotide, reduced form Nuclear magnetic resonance... 

CN 3-(acetylamino)-l-propanesulfonic acid calcium salt (2 1) free acid... 

TAPSO A-tris(hydroxymethyl)methyl-2-hydroxy-3-aminopropanesulfonic acid. EPPS A-2-hydroxyethylpiperazine-JV -3-propanesulfonic acid. 

C3aHg()03o C3H703S Na+ 9 H20 Cyclomaltohexaose-sodium 1-propanesulfonate, nonahydrate ACDPRS 43 354... 

Sulfite, sulfur dioxide Ce(IV)-3-(cyclohexylamino)propanesulfonic acid (sensitizer), air 0.02 Xg/mL 2... 

Polyacrylamido-2-methyl-l-propanesulfonic Acid - 1.0-5.0 Aldrich, Milwaukee, WI... 

BAL is the standard treatment for poisoning by arsenic compounds and will alleviate some effects from exposure to arsenic vesicants. It may also decrease the severity of skin and eye lesions if applied topically within minutes after decontamination is complete (i.e., within 2-5 minutes postexposure). Additional chelating agents for the treatment of systemic arsenic toxicity include meso-2,3-dimercaptosuccinic acid (DMSA) and 2,3-dimercapto-l-propanesulfonic acid (DMPS). 

Hydroxy-1-propanesulfonic acid y-sultone, pi97 2-Hydroxypropanoic acid, LI, L2... 

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