The general anaesthetic sevoflurane was prepared from chlorosevo ether using two fluorinating agents, potassium fluoride dihydrate in the presence of a phase transfer catalyst and potassium fluoride in the presence of a complexing solvent. A pure sevoflurane product could not be recovered via conventional distillation from the crude reaction mass obtained using the dehydrate (at 72% purity), du...

For the detection of homocystine in urine specimens, a simple thin-layer chromatographic method was devised. Thirty ƒÊl of urine specimens without any prior treatment were applied onto a silica gel-G plate, and developed by ascending chromatography using a phenol water mixture (3: 1) containing 0.05 0 0 potassium cyanide. After developing and drying the plate, a slightly modified potassium iodo...

Najafi-Ghiri M., Abtahi A. (2013): Potassium fixation in soil size fractions of arid soils. Soil & Water Res., 8: 49–55. Amounts of potassium (K) fixed in soil fractions of 10 calcareous soils of southern Iran were measured to evaluate the contributions of different soil size fractions to K fixation. Soil particles were fractionated after dispersion of the soils with an ultrasonic probe. Potass...

Nanocellulose is a renewable material with excellent properties. At present, nanocellulose powder mainly prepared by high-cost spray drying, which severely limits its output and quality. In this paper, we propose an innovative method to prepare dispersible simple precipitation conventional evaporation. Potassium acetate was added CNC (a kind of nanocellulose) suspension precipitate purify CNC. ...

ABSTRACT- Greenhouse experiment was conducted in factorial experiment arranged as a completely randomized design (CRD) to evaluate the effect of Glomus intraradices, Pseudomonas fluorescence and soil drying on different forms of potassium (K) and the changes of clay minerals in a calcareous soil after maize planting. Treatments consisted of arbuscular mycorrhizal (AM) fungus at two levels: G0 (...

That some of the potassium added in the form of fertilizers or otherwise becomes fixed in the soil had been known for a long time. With the clarification of the phenomena of base exchange in soils by Gedroiz it was revealed that the K-ion is fixed in the exchange complex not only in replaceable but also in non-replaceable form. A review of the work in this connection may be found in the paper b...

Scanning Electron Microscopy (SEM) has been widely used to investigate the microstructure of clays, and several studies have examined influence particles orientation on mechanical behaviour soil. However, as effect sample preparation that precedes imaging soil not systematically studied yet, extent which clay is disrupted quantified. This work investigated samples having different mineralogy, s...