Since it is recognized that carbohydrates, as free oligosaccharides and constituents of glycoconjugates, play important roles in many biological functions of glycoproteins, a variety of analytical techniques have been developed for highly sensitive detection and analysis of complex oligosaccharides obtained from a variety of biological media [1]. Presently, among many analytical techniques, mas...

Treatment of aldosterone with 35% HCl in EtOH or in MeOH followed by the picolinyl derivatization gave the picolinyl derivative of aldosterone-ethyl ether, 8, or methyl ether, 9, as a single and well-shaped liquid chromatographic peak. Picolinyl derivatization of aldosterone produced 21-picolinyl derivative of 18,20-anhydro-hemiacetal derivatives, 6, with poor chromatographic peak with wide hal...

Integrating large amounts of wind power into power systems brings a large influence on the dynamic frequency response characteristic (DFRC). The traditional low-order system frequency response (SFR) model is no longer applicable at the current time. Based on the small signal analysis theory, a set of novel low-order SFR models for doubly-fed induction generator (DFIG) distributed wind power gen...

approved.:--Sandra L. Woods The reductive dechlorination of chlorobiphenyls in sediment by titanium(III) citrate-reduced vitamin Bus was studied in batch reactors. Long term ampoule studies demonstrated reductive dechlorination of sediment-sorbed 2,3,4,5,6-pentachlorobiphenyl (2,3,4,5,6-PeCB) to tetra-, tri-, di-, and monochlorobiphenyl products. Over 50% chlorine removal was observed over 160 ...

Dual-Functional Radar-Communication (DFRC) system is an essential and promising technique for beyond 5G. In this work, we propose a powerful unified multi-antenna DFRC transmission framework, where additional radar sequence transmitted apart from communication streams to enhance beampattern matching capability, Rate-Splitting Multiple Access (RSMA) adopted better manage the interference. RSMA r...

A highly sensitive and selective fluorometric method for the determination of histamine and histidine has been developed. This method is based on an intramolecular excimer-forming fluorescence derivatization with a pyrene reagent followed by reversed-phase liquid chromatography. The analytes, containing two amino moieties in a molecule, were converted to the corresponding dipyrene-labeled deriv...

Previous studies have shown canavanine to be a potent antagonist of arginine in Neurospora (1) and in some bacteria, but not in others (2, 3). Streptococcus faecaks belongs to the resistant group of bacteria and has been shown to degrade canavanine in two distinct ways: by reductive cleavage to guanidine and homoserine (4) and, to a lesser extent, by hydrolytic cleavage to ammonia and 0-ureidoh...