An improved sample preparation procedure for trace-levels of lanthanides in uranium-bearing samples was developed. The method involves a simple co-precipitation using Fe(III) carrier in ammonium carbonate medium to remove the uranium matrix. The procedure is an effective initial pre-concentration step for the subsequent extraction chromatographic separations. The applicability of the method was...

It has been commonly assumed that carbamate kinnse (EC 2.7.2.2, ATP : carbamate phospllotransferase) catalyzes the transfer of a phosphate group between 1TP and the carbamate ion. Evidence which has been put forward supporting this belief is the observation that freshly dissolved ammonium carbamate is a much better substrate for the enzyme than freshly dissolved ammonium carbonate at pH 9.4 (1)...

An annular denuder system, which consisted of a cyclone separator; two diffusion denuders coated with sodium carbonate and citric acid, respectively; and a filter pack consisting of Teflon and nylon filters in series, was used to measure acid gases, ammonia (NH3), and fine particles in the atmosphere from April 1998 to March 1999 in eastern North Carolina (i.e., an NH3-rich environment). The so...

The aim of the study is to determine chemical and physical properties gallstones Antalya province. In line with this, mineralogical characteristics 1243 gallstone samples from 69 patients were analyzed, using scanning electron microscopy (SEM) Fourier-transform infrared spectroscopy (FTIR) analysis. 
 Cholesterol, carbonate apatite, calcium carbonate, phosphate bilirubinate, protein conten...

An optimum carrier rugosity is essential to achieve a satisfying drug deposition efficiency for the carrier based dry powder inhalation (DPI). Therefore, a non-organic spray drying technique was firstly used to prepare nanoporous mannitol with small asperities to enhance the DPI aerosolization performance. Ammonium carbonate was used as a pore-forming agent since it decomposed with volatile dur...

Synthesis of protein amides from ammonia has been proposed (Bliss (1)) as a tissue function whose demonstration is of cardinal importance to the development of the theory that blood protein amide nitrogen represents detoxified ammonia, first employed in tissues for neutralization of acid, in course of transport to the kidneys where the amide nitrogen reappears as urinary ammonia. Questionable i...

Ferrite grade zinc oxide was prepared through aqueous processing of zinc ash followed by calcination. Zinc was quantitatively dissolved in sulphuric acid medium. The ferrous iron present in the leach solution was oxidised with hydrogen peroxide followed by precipitation of total iron by pH adjustment to 4.5 with dilute sodium hydroxide solution. Copper was removed by cementation using zinc dust...

BACKGROUND A reliable quenching and metabolite extraction method has been developed for Lactobacillus plantarum. The energy charge value was used as a critical indicator for fixation of metabolism. RESULTS Four different aqueous quenching solutions, all containing 60% of methanol, were compared for their efficiency. Only the solutions containing either 70 mM HEPES or 0.85% (w/v) ammonium carb...

Purpose To compare the results of a chemical method of kidney stone analysis with the results of Fourier transform infrared (FT-IR) spectroscopy. Materials and Methods Kidney stones collected between June and October 2015 were simultaneously analyzed by chemical and FT-IR methods. Results Kidney stones (n=449) were collected from patients from 1 to 81 years old. Most stones were from adults...

Zincian georgeite, an amorphous copper–zinc hydroxycarbonate, has been prepared by co-precipitation using acetate salts and ammonium carbonate. Incorporation of zinc into the georgeite phase and mild ageing conditions inhibits crystallisation into zincian malachite or aurichalcite. This zincian georgeite precursor was used to prepare a Cu/ZnO catalyst, which exhibits a superior performance to a...