Knowledge of the structure of carcinoembryonic antigen (CEA) is essential if we are to understand the relationship of this molecule to similar, possibly cross-reacting, molecules present in nonmalignant states. Electron microscopy shows that at neutral pH, CEA particles consist of homogeneous, morphologically distinctive, twisted rod-shaped particles, about 9 X 40 nm. The carbohydrate structure...

Abstract This work represents a new method that uses electrochemically generated periodate to oxidize side‐stream lignins. Using periodate, lignin‐derived product other than vanillin becomes accessible. The development of an eco‐friendly for generating 5‐iodovanillin from lignin is reported and significant interest the wood‐based industry. Wider utilization can substitute fossil‐based chemicals...

Several lines of evidence indicate that mammalian fertilization is initiated via a binding process that is dependent upon the recognition of oligosaccharide sequences associated with zona pellucida (ZP) glycoproteins. Here, specific chemical and enzymatic methods were employed to modify human ZP and to test their effects on sperm binding in the hemizona assay system (HZA). Periodate oxidation o...

Aldehyde groups enable facile conjugation to proteins, enzymes, oligonucleotides or fluorescent dyes, yet there are no literature examples of water-soluble aldehyde-functional vinyl monomers. We report the synthesis a new hydrophilic cis-diol-based methacrylic monomer (GEO5MA) by transesterification isopropylideneglycerol penta(ethylene glycol) using methyl methacrylate followed acetone deprote...

The efficient and selective partial oxidation of light alkanes using potassium periodate and potassium chloride is reported. Yields of methane functionalization in trifluoroacetic acid reach >40% with high selectivity for methyl trifluoroacetate. Periodate and chloride also functionalize ethane and propane in good yields (>20%).

A highly sensitive flow injection-chemiluminescence detection (FI-CL) method based on pyrogallol (Pg) chemiluminescent reagent (CLreagent) oxidized by periodate for the determination of propranolol is presented. The presented method is an indirect CL detection method based on the CL emission generated during the oxidation of Pg with the excess of periodate that remains after oxidation of propra...

Apart from the generally dominant trivalent oxidation state, several lanthanides can occur in divalent or tetravalent states as well. Changing valence state alters chemical properties and, therefore, gives opportunity to ease intragroup lanthanide separations. The hydrated terbium(III) ion has a highly positive reduction potential (E0 = + 3.1 V vs. SHE), but it be oxidized its via ozonolysis el...