When living muscular tissue is at rest its reaction to test paper is faintly alkaline or neutral. When it contracts, and during the period of rigor mortis, carbonic acid is set free, and the reaction of the muscle to test paper becomes distinctly acid. This acidity is supposed to result from the liberation of lactic acid ; but in what way this acid and carbonic acid are produced, or from what p...

In connection with investigations under way in this laboratory concerning the metabolism of compounds containing methyl groups, it was desired to prepare methionine in which the methyl group was labeled with C!14. Methionine labeled with deuterium in the methyl group has been used by du Vigneaud and coworkers (1,2) in studies of transmethylation. The extremely sensitive methods available for th...

Batch regeneration of barium carbonate (BaCO(3)) from barium sulphide (BaS) slurries by passing CO(2) gas into a pilot-scale bubbling column reactor under ambient conditions was used to assess the technical feasibility of BaCO(3) recovery in the Alkali Barium Calcium (ABC) desalination process and its use for sulphate removal from high sulphate Acid Mine Drainage (AMD). The effect of key proces...

During the course of an investigation into the excretion of “detoxication products” in the chicken (1) the need arose for a reasonably simple and reliable method for the estimation of “ethereal sulfate” in quantities of 0.1 to 1 mg. of SOa in volumes of some ml. of chicken urine. As none of the methods tried seemed satisfactory in the form described, a modification was developed. It appears tha...

Marine macroinvertebrates are ideal sentinel organisms to monitor rapid environmental changes associated with climatic phenomena. These organisms build up protective exoskeletons incrementally by biologically-controlled mineralization, which is deeply rooted in long-term evolutionary processes. Recent studies relating potential rapid environmental fluctuations to climate change, such as ocean a...

In the deltaic plain of the Ganges-Meghna-Brahmaputra rivers, arsenic concentrations in groundwater commonly exceed regulatory limits (50 μg l) because FeOOH is microbially reduced and releases its sorbed load of arsenic to groundwater. Neither pyrite oxidation nor competitive exchange with fertilizer-phosphate contribute to arsenic pollution. The most intense reduction, and so severest polluti...

The extraction of cesium, strontium, and a number stable components simulated high-level waste solutions from nitric acid media with crown ether derivatives in new fluorinated diluents was studied. Based on the data solubility extractants into aqueous phase physicochemical properties used, most promising systems were chosen: ethers 4,4‘(5’)-di-tert-butyldibenzo-18-crown-6 (L1) 4,4‘(5’)-di-tert-...