High concentrations of nitrogen compounds, such as ammonia observed in the petrochemical industry, are the major environmental pollutants. Therefore, effective and inexpensive methods are needed for its treatment. Biological treatment of various pollutants is a low cost and biocompatible replacement for current physico-chemical systems. The use of aquatic plants is an effective way to absorb th...

During recent studies conducted with suspensions of three strains of Saccharomyces cerevisiae, it was observed that ammonia was rapidly liberated when L-asparagine was added to the medium. Subsequent investigation has revealed that these strains of S. cerevisiae have an externally active asparaginase as well as an internally active one. The appearance of the external asparaginase is stimulated ...

The title compound, NH(4) (+)·C(2)H(8)NO(6)P(2) (-)·2H(2)O, was obtained by the reaction between 1-amino-ethane-1,1-diyldiphospho-nic acid and ammonium hydroxide (1:1) in an aqueous solution. The asymmetric unit contains one anion with two H atoms transferred from the phospho-nic acid groups to the amino group of the anion and to an ammonia mol-ecule, giving an ammonium cation. The structure di...

Paris green or Schweinfurt's green is a cheniical compound of arsenic, copper and acetic acidIts chemical name is copper aceto-arsenite, its f?r" mula being 3 Cu H As 03 -jCu (C2 H3 Os)r It is therefore a double salt of copper arsenite and acetate. It is a microcrystalline powder 01 emerald green colour. It is practically insoluble in water. It is perfectly soluble in ammonia a11 concentrated a...

Hepatic encephalopathy (HE) is a common neuropsychiatric complication of both chronic and acute liver failure that is characterized by psychomotor, intellectual and cognitive impairment [1]. The mechanism of neuronal dysfunction in HE has not yet been conclusively investigated and possibly implies numerous pathological processes. It is widely accepted that among the factors contributing to HE, ...

In the title compound, [Ag(2)(C(5)H(2)N(2)O(4))(NH(3))(2)], each of the two Ag(I) atoms is coordinated by two N atoms from an ammonia mol-ecule and a 5-carb-oxy-1H-imidazole-4-carboxyl-ate ligand in an almost linear geometry, and by one carboxyl-ate O atom with a weak inter-action. The Ag atoms are assembled into a linear tetra-mer through Ag⋯Ag inter-actions. Each Ag tetra-mer is linked by fou...

cY-Aminopropionitrile-1-W was identified in cultures of a psychrophilic basidiomycete fed HWN. The results of the study suggest that this compound is a precursor of alanine. This suggestion is supported by experiments with H1G5N as well as by a time course evaluation of 14C labeling in or-aminopropionitrile and alanine in fungal mats. Evidence is presented for the presence of a nitrile syntheta...

Detection of moisture contamination in hydride gases, such as ammonia used for epitaxial growth, has become a significant concern for manufacturers of III-V compound semiconductors. The presence of moisture in NH3 can negatively affect device properties, such as minority-carrier lifetimes and luminescent efficiency in light-emitting diodes. Tunable diode laser spectroscopy (TDLAS) has emerged a...

The title compound, [Li(NH(3))(4)](+)[Li(NH(3))(3)S(3)](-), an ammo-niate of the previously unknown lithium tris-ulfide, was obtained from the reaction of lithium and sulfur in liquid ammonia. The asymmetric unit consists of two crystallographically independent formula units. The [Li(NH(3))(4)](+) cations are close to regular LiN(4) tetra-hedra. The anions contain LiSN(3) tetra-hedra; the S-S-S...

The reaction of ammoniacal AgNO3 solution (or aq. [Ag(NH3)2]NO3) with NaClO4 resulted in [Ag(NH3)2]ClO4 (compound 1). Detailed spectroscopic (correlation analysis, IR, Raman, and UV) analyses were performed on [Ag(NH3)2]ClO4. temperature enthalpy phase change for compound 1 determined to be 225.7 K 103.04 kJ/mol, respectively. We found the thermal decomposition involves a solid-phase quasi-intr...