The production of phosphoric acid by sulfuric acid from high iron content phosphate rocks such as (Abu-Tartur phosphate rocks) has many disadvantages as low quality of produced acid and huge amounts of calcium sulfate. Also traditional process for production of dicalcium phosphate from wet phosphoric acid takes many steps. According to these problems, this work concerned to produce feed grade DCP by direct acidulation of Abu-Tartur phosphate rock with HCl in order to decrease production cost and produce relatively pure phosphoric acid. The leaching of phosphate ore by using dilute HCl was...

The deleterious effects of plant extracts or pure compounds on insects can be manifested in several manners including toxicity, repellent, antifeedant growth inhibitor, suppression of reproductive behavior and reduction of fecundity and fertility. Different types of plant preparations such as powders, solvent extracts, essential oils and whole plants are being investigated for their insecticidal activity including their action as fumigants, repellents, antifeedants, anti-ovipositions and insect growth regulators. The Egyptian woody perennials, Ipomea carnea belongs to family Convolvulaceae;...