potassium is an essential plant macronutrient. different microorganisms including bacteria, fungi, yeast, algae and mosses are able to decompose silicate minerals of soil and to dissolve nutrient such as k, fe, zn and si, among them bacteria are more important. the aim of this study was to investigate the influence of two bacteria (azospirillum lipoferum and azotobacter chrococoum) on soil avai...

Alkaline solutions, such as sodium, potassium or lithium silicates, appear to be very promising as healing agents for the development of encapsulated self-healing concretes. However, the evolution of their mechanical and acoustic properties in time has not yet been completely clarified, especially regarding their behavior and related kinetics when they are used in the form of a thin layer in co...

The effect of alkali content (% K2O + %Na2O) on the mechanical properties of alkali activated blast furnace paste has been investigated. The paper presents the study on workability, compressive strength, split tensile strength and microstructure of alkali activated blast furnace slag paste specimens prepared by using of sodium silicate and potassium hydroxide solution as activators. The experim...

A simple and highly sensitive method is proposed for determination of trace amount of cerium. New method involves bleaching of greenish colour dye-malachite green, by the action of iodine, which is released by reaction between potassium iodide and cerium (IV) in acidic medium. Beer’s law is obeyed over concentration range of 0.6 to 4.6 μg cerium (IV) in final volume of 25 ml (0.024-0.184 ppm). ...

During the 2019 and 2020 seasons, Sultani fig trees were sprayed two times (at 1st week of April May) with levels potassium silicates (1 2 %), Calcium nitrate %) kaolin at 5 %. The study focused on effect foliar application kaolin, silicon vegetative growth, tree nutritional status, number fruits per yield fruit quality.Results showed that applications 1% or 2% silicate, calcium 5% very effecti...

This study experimentally investigates the isotopic behaviors of Li and K during dissolution silicate rocks (i.e., basalt granite). Proton-driven (in 0.8 M HNO3) ligand-driven 5 mM critic acid or oxalic acid) experiments were performed in batch-closed systems over 15 days. We provide a time-series interpretation isotope fractionation ultra-acidic (unidirectional) near-natural (biologically affe...