Metalloporphirins; Cu(TPP), Mn(TPP)Cl, CO(TPP), Fe(TPP)Cl, zn(TPP) and Mn(OBP)Cl catalyze region and chemoselective silylation of hydroxyl groups with HMDS. Fe(TPP)Cl is the most effective catalyst and silylation occurs immediately in its presence at room temperature.

The binding of thiamine pyrophosphate (TPP) to several enzymes has been determined by measuring cofactordependent activity after passage of each enzyme through a column of Sephadex G-25 to remove non-protein-bound cofactors. TPP was found to be bound irreversibly to yeast and Zymomonas pyruvate decarboxylases, Aerobacter (Yacetolactate synthetase, and Escherichia glyoxylate carboligase. Cofacto...

A well-defined amphiphilic core-shell polymer functionalized with bis(p-methoxyphenylphosphino)phenylphosphine (BMOPPP) in the nanogel (NG) core has been obtained by a convergent RAFT polymerization in emulsion. This BMOPPP@NG and the previously-reported TPP@NG (TPP = triphenylphosphine) and core cross-linked micelles (L@CCM; L = TPP, BMOPPP) having a slightly different architecture were loaded...

The singly charged, parent anions of three transition metal, tetraphenyl porphyrins, M(TPP) [Fe(TPP), Mn(TPP), and Ni(TPP)], were studied by negative ion photoelectron spectroscopy. The observed (vertical) transitions from the ground state anions of these porphyrins to the various electronic states of their neutral counterparts were modeled by density functional theory computations. Our experim...

Safety assessment of thermal power plants (TPP) is an important means to ensure the safety of production in thermal power production enterprises. Modern information technology can play an important role in TPP safety assessment. The evaluation of power plant systems relies, to a large extent, on the knowledge and experience of the experts undertaking the task. Case-based reasoning (CBR) is intr...

Thyrotoxic periodic paralysis (TPP) is a rare manifestation of hyperthyroidism characterized by muscle weakness and hypokalemia. All ethnicities can be affected, but TPP typically presents in men of Asian descent. The most common cause of TPP in thyrotoxicosis is Graves' disease. However, TPP can occur with any form of thyrotoxicosis. Up to our knowledge, very few cases ever reported the relati...

Chitosan microparticles were prepared with tripolyphosphate (TPP) by ionic crosslinking. The particle sizes of TPP-chitosan microparticles were in range from 500 to 710 microm and encapsulation efficiencies of drug were more than 90%. The morphologies of TPP-chitosan microparticles were examined with scanning electron microscopy. As pH of TPP solution decreased and molecular weight (MW) of chit...

In order to produce a more efficient cancer cell death, a dual-functional polypeptide, xPolyR8-KLA(TPP), was synthesized by disulfide cross-linking CR8C and C-KLA(TPP). The obtained xPolyR8-KLA(TPP) could not only initiate tumor cell apoptosis by C-KLA(TPP) with improved cell penetrating ability, but was also capable of loading and delivering the tumor cell suppressing p53 gene. It was found th...

A new point-of-care colloidal metal immunoassay urine drugs-of-abuse testing device, the BIOSITE TRIAGE Plus Propoxyphene (TPP), was evaluated for the rapid detection of dextropropoxyphene (PPY) and/or its primary metabolite, norpropoxyphene (NP), in urine at a total PPY/NP concentration of 300 ng/mL or greater. This assay has been added to the Triage device that tests for commonly abused drugs...