Spencer E. Zaugg's research while affiliated with Weber State University and other places

Publications (7)

Article
Rapid analysis of carbonated beverages by capillary electrophoresis (CE) allows the simultaneous determination of aspartame, benzoic acid and caffeine in 2 min using 20 mM glycine buffer at pH 9.0 and direct detection at 215 nm. The rapid determination of these compounds with minimal sample preparation offers an excellent method for evaluating stab...
Article
Salicin is a phenolic glycoside in willow bark which exhibits analgesic effects. Its occurrence in willow (Salix) species is the major reason willow bark and its extracts are popular products in the nutritional supplement market. Previously, HPLC has been the standard method of analysis of quantifying salicin in Salix. We describe a new method of a...
Article
Comment: That [alpha]-agonists improve the overall quality of postoperative analgesia in patients receiving another form of analgesic therapy is not surprising in light of the work by Eisenach and others. I am also not surprised that the patients receiving 0.3 mg of clonidine experienced hemo-dynamic changes, because this dose is a therapeutic dose...
Article
Bacterial-facilitated depletion of cyanide is under development for remediation of heap leach operations in the gold mining industry. Capillary electrophoresis was found to be a powerful tool for quantifying cyanide depletion. Changes in cyanide concentration in aqueous suspensions of Pseudomonas alcaligenes bacteria and cyanide at elevated pH were...
Article
Postoperative analgesia may be prolonged by the addition of clonidine to local anesthetic solutions used for regional anesthesia.The purpose of this study was to test this hypothesis in a clinical trial of patients undergoing podiatric surgery. The study design was prospective, double-blinded, and randomized. Ninety ASA physical status I or II pati...
Article
Postoperative analgesia may be prolonged by the addition of clonidine to local anesthetic solutions used for regional anesthesia. The purpose of this study was to test this hypothesis in a clinical trial of patients undergoing podiatric surgery. The study design was prospective, double-blinded, and randomized. Ninety ASA physical status I or II pat...
Article
The use of capillary electrophoresis allows simultaneous determination of selenate and selenite during reduction by whole bacteria or their lysates. Optimal separation was achieved with 20 mM sodium borate and 1.0 mM tetradecyltrimethylammonium bromide, pH 9.5, −25 kV, at 28°C in an open, uncoated 44 cm×75 μm silica column. This method eliminates m...

Citations

... Usando electroforesis capilar Walker et al. 24 , realizaron análisis en bebidas de cola, obteniendo cantidades superiores en la Coca-Cola light e inferiores en la Pepsi-cola normal (Tabla III). ...
... Modification of the capillary surface with a cationic surfactant, which leads to the appearance of the positive fixed charges, is commonly used for reverse EOF. A range of longchain alkyltrimethylammonium salts, including cetyltrimethylammonium bromide (CTAB) [35,37], trimethyltetradecyloammonium bromide (TTAB) [39,40] or hydroxide (TTAOH) [41,42] and hexadecyltriethylammonium phosphate (HDTA) [43] or bromide (HDTAB) [36] could be utilised fairly well for this purpose. The combination of both negative applied potential and cationic surfactant added to the electrolyte solution appeared to be especially convenient for resolving selenium oxoanions and selenoamino acids, such as selenomethionine and selenocystine [35,39,41,43]. ...
... The bioactive phytomolecules, medicinal values, and nutritional properties of this plant have been extensively studied by previous researchers [27][28][29][30]. Salix bark is a rich and inexpensive source of phenolic glycosides [31] and polyphenols, such as flavonoids and condensed tannins [32]. These constituents are reported to possess antirheumatic, antipyretic, anti-inflammatory, hypoglycemic [33], antibacterial [34], and antioxidant activities [30,35]. ...
... Several studies have been carried out using different concentrations of clonidine for the enhancement of epidural anesthesia, [6] brachial plexus anesthesia, [7] and anesthesia of peripheral nerves. [8] Brkovic et al. [9] mentions that clonidine (15 µg/ml) added to 2% lidocaine produces an onset, duration, and intensity of intraoral block anesthesia similar to those gained by a solution of 2% lidocaine with epinephrine (12.5 µg/ml). ...
... Biological degradation of cyanide in which CN − is converted to CO 2 , NH 3 , and OH − by bacteria, when appropriate, is considered the most cost-effective method in cyanide detoxification and has been used in cyanide detoxification of heap leaches containing more than 1.2 million t (Mosher and Figueroa 1996 ). Concentrations of 10 5 cells of Pseudomonas alcaligenes/mL can reduce cyanide from 100 to <8 mg/L in 4 d at elevated pH (Zaugg et al. 1997). Strains of Escherichia coli isolated from gold extraction liquids metabolically degrade cyanide at concentrations up to 50 mg HCN/L in the presence of a glucose–cyanide complex (Figueira et al. 1996). ...