Robert Luther’s student, Herr cand. Meinecke, moved a wire loop along the test tube to mark the position of the propagating front, with the image projected onto a screen so the entire audience could see. It was May 21, 1906, at the Main Meeting of the Deutsche Bunsengesellschaft für Angewandte Physikalische Chemie held in Dresden, Germany. Luther, who was Director of the Physical Chemistry Labo...

Diclofenac, a non-steroidal anti-inflammatory drug, is prescribed to reduce inflammation and as an analgesic reducing pain in certain conditions. In this study, a sensitive reaction system for quantitative determination of diclofenac was introduced. The method is based on the catalytic effect of diclofenac on the Orange G-bromate reaction system. The change in absorbance was followed spectropho...

This study evaluates how the characteristics of activated carbon (AC) influence the adsorption–reduction of bromate (BrO3−) by performing inetic and isotherm tests. Experimental results reveal that both physical and chemical effects simultaneously affect the adsorption–reduction rocess. The wood-based carbons contained more mesopores than coconutand coal-based carbons, resulting in the adsorpti...

The effects of various parameters on bromate reduction were tested using lab-scale batch reactors with sulfur based autotrophic and methanol based heterotrophic denitrification processes. The initial bromate (BrO3-) concentration of 100 and 500 μg/L was completely reduced and bromide (Br-) was produced stoichiometrically from bromate in all batch reactors. In all experiments, nitrate was comple...

A new, simple, sensitive and selective catalytic method is developed for the determination of vanadium in natural and sea waters. The method is based on the catalytic effect of V(V) and/or V(IV) on the bromate oxidative-coupling reaction of metol with 2,3,4-trihydroxybenzoic acid (THBA). The reaction is followed spectrophotometrically by tracing the oxidation product at 380 and/or 570 nm after ...

Disinfection by-products (DBPs) are ubiquitous contaminants in tap drinking water with the potential to produce adverse health effects. Filtering and boiling tap water can lead to changes in the DBP concentrations and modify the exposure through ingestion. Changes in the concentration of 4 individual trihalomethanes (THM4) (chloroform (TCM), bromodichloromethane (BDCM), dibromochloromethane (DB...

A chlorate reductase has been purified from the chlorate-reducing strain Pseudomonas chloritidismutans. Comparison with the periplasmic (per)chlorate reductase of strain GR-1 showed that the cytoplasmic chlorate reductase of P. chloritidismutans reduced only chlorate and bromate. Differences were also found in N-terminal sequences, molecular weight, and subunit composition. Metal analysis and e...

We aimed her mainly to evaluate the contribution of newly employed bromate selection system, in obtaining new Aspergillus niger nitrate/nitrite assimilation defective mutants, through Ultraviolet treatment (UV), 1, 2, 7, 8-Diepoxyoctane (DEO), phenols mixture (Phx)) and spontaneous treatments. The newly employed bromate selection system was able to specify only two putative novel mutant types d...

The numerous methods for determining magnesium in biological fluids that have been reported in the past have varied from chemical to spectrochemical techniques. Among these various procedures have been included gravimetric, calorimetric, and titrimetric techniques. The gravimetric micromethod based on the precipitation of magnesium B-hydroxyquinoline in hot ammoniacal solution, first utilized b...

In Part I, it expands the initial Phase I work by evaluating the roles of various co-constituents that could be present in drinking water or in stomach fluids to determine their affect on the rates of reaction in simulated gastric juice at low pH and in the presence of chloride and hydrogen sulfide. The issue being investigated was whether bromate could be decomposed to some degree in the stoma...