[1] The low-temperature phase behavior of ammonium sulfate ((NH4)2SO4) films has been studied using Fourier transform infrared (FTIR) spectroscopy. While the deliquescence of ammonium sulfate aerosols is well characterized at temperatures above the eutectic of ice and anhydrous ammonium sulfate at 254 K, much less is known about the phase properties at lower temperatures. In the present study, ...

The chemical reaction networks (CRNs), which led to the transition on early Earth from geochemistry biochemistry remain unknown. We show that simplest substances—bicarbonate, sulfite/sulfate, and ammonium—were converted peptides in one geological setting Sammox (sulfite/sulfate reduction coupled anaerobic ammonium oxidation)-driven CRNs under mild hydrothermal conditions. Peptides comprise 15 p...

Nitrogenous fertilizers are generally thought to have an important role in regulating methane oxidation. In this study, the effect of ammonium on methane oxidation activity was investigated in a paddy soil using urea at concentrations of 0, 50, 100, 200, and 400 μg N per gram dry weight soil (N/g.d.w.s) and ammonium sulfate at concentrations of 0, 50, and 200 μg N/g.d.w.s. The results of this s...

Soybean cell suspension cultures grew on defined media with ammonium as the sole nitrogen source if Krebs cycle acids were added. Satisfactory growth was obtained with ammonium salts of citrate, malate, fumarate, or succinate, when compared with the regular medium containing nitrate and ammonium. Little or no growth occurred when ammonium salts of shikimate, tartrate, acetate, carbonate, or sul...

Two different forms of crystals (potentially) suitable for x-ray structure analysis were obtained for recombinant human interleukin-2 (IL-2) using ammonium sulfate as a precipitant in the pH range of 6.3-7.3 (in the case of hexagonal bipyramidal crystals) and 4.5-5.5 (in the case of plate crystals). The hexagonal bipyramidal crystal belongs to a hexagonal space group P6(2)22 or P6(4)22 with a =...

The catalytic activity of four metal ions the fourth period table by D.I. Mendeleev in oxidation potassium iodide with ammonium persulfate. greatest increase reaction rate is observed presence copper sulfate, least cobalt and nickel salts

Ammonium carbonate and ammonium sulfate have been proposed and used as two new fuels for synthesizing gamma alumina nanoparticles. The prepared samples have been characterized by X-ray diffraction (XRD), 2 N  adsorption (BET) and Transmission electron microscopy (TEM). A comparison has been made between the properties of the nanoparticles synthesized by these two fuels and other conventio...

Atmospheric particles containing organic species and inorganic salts may undergo liquid–liquid phase separation when the relative humidity varies between high and low values. To better understand the parameters that affect liquid–liquid phase separation in atmospheric particles, we studied the effects of molecular weight and temperature on liquid–liquid phase separation in particles containing ...

Starting Matinal-The anterior lobes used in these studies were obtained from mature humpback whales.’ The average interval between the death of the animal and removal of the pituitary was about 20 hours. Once removed, the gland was frozen as rapidly as possible and stored at -15” until used. The weights of t,he individual anterior lobes ranged from 6 to 40 gm.; those from females tended to be h...