in order to evaluate the effects of different levels of potassium and nitrogen on nitrogen use efficiency (nue) and yield of rapeseed (hyola 401), a field experiment was conducted at rice research institute of iran (rasht) in a factorial experiment based on a complete randomized block design with 3 replications for two years (2008-2010). the first factor was pure potassium fertilizer in three l...

An investigation into the chemiluminescence of fourteen organic acids and tris(2,2'-bipyridyl)ruthenium(II) was undertaken. Particular emphasis was placed upon the method of production of the reagent, tris(2,2'-bipyridyl)ruthenium(III), with cerium(IV) sulfate, potassium permanganate, lead dioxide and electrochemical generation. Analytically useful chemiluminescence was observed when Ce(IV) or ...

We investigated the effects of coloring agent and potassium sulfate (K2SO4) foliar sprays, reflective aluminium porous film covering on orchard floor enhancement red peel coloration in ‘Hongro’ apples. Foliar spray sulfate, mulching before harvest increased Hunter a value anthocyanin content fruit peels at harvest. In addition, micro-porous had best effect promoting fruits lower inner canopy, n...

We have developed the first example of hypervalent iodine(V)-catalyzed regioselective oxidation of phenols to o-quinones. Various phenols could be oxidized to the corresponding o-quinones in good to excellent yields using catalytic amounts of sodium salts of 2-iodobenzenesulfonic acids (pre-IBSes) and stoichiometric amounts of Oxone® as a co-oxidant under mild conditions. The reaction rate of I...

A simple, rapid, gradient reversed phase Ultra Performance Liquid Chromatographic method with ultraviolet detection (UPLC-UV) was developed for analysis of Albuterol sulfate and its impurities in Albuterol sulfate inhalation solution pharmaceutical formulation. Chromatography was carried out on a Waters Acquity BEH C18 (1.7μm, 100mm.x 2.1mm) column using 0.02 M Potassium Dihydrogen Orthophospha...

A simple rotational viscometer has been constructed for measurements at elevated temperatures in the region 109 — 2 x 1012 poise, and has been used to study the deformation of pure fee lithium sulfate (temperature range 740 —860 °C) and mixtures of this salt with potassium sulfate. These substances resemble highly-viscous non-NEwroidan liquids, and for a given torque the apparent viscosity can ...

Nucleotide monophosphate kinases (NMPKs) are potential antimicrobial drug targets owing to their role in supplying DNA and RNA precursors. The present work reports the crystal structure of Staphylococcus aureus guanylate monophosphate kinase (SaGMK) at 1.9 A resolution. The structure shows that unlike most GMKs SaGMK is dimeric, confirming the role of the extended C-terminus in dimer formation ...