to evaluate the effects of fertilizing and deficit irrigation regimes on some chemical properties of soil and plant, an experiment was conducted during 2007 and 2008 growing seasons. experimental design was a split plot based on a randomized complete block design with four replications. the treatments consisted of three deficit irrigation regimes (main plots) and six soil fertilizing systems (s...

The requirement of a divalent metal ion for all enzymatic reactions involving adenosine diand triphosphate is well established, but the role of the metal ion is not clearly understood. In some kinase reactions (1, 2) kinetic evidence has been presented that the metal complex of adenosine triphosphate is the true substrate in the enzymatic reaction. The present study was undertaken to obtain inf...

The increasingly more stringent phosphorus (P) discharge limits, which are below the concentrations reliably achievable with currently available technologies, demand for better understanding of phosphorus removal mechanisms. This study investigated the compositional fractions of phosphorus (P) in various effluents as well as the efficacy of different levels of treatment processes for removing d...

The requirement of a divalent metal ion for all enzymatic reactions involving adenosine diand triphosphate is well established, but the role of the metal ion is not clearly understood. In some kinase reactions (1, 2) kinetic evidence has been presented that the metal complex of adenosine triphosphate is the true substrate in the enzymatic reaction. The present study was undertaken to obtain inf...

This brief literature review examines treatment technologies available for wastewater treatment plants to remove phosphorus. Although it is not meant to be exhaustive or complete, it does include some of the newest available reports on P removal. Treatment technologies presently available for phosphorus removal include: Physical: filtration for particulate phosphorus membrane technologies Chemi...

in order to investigate the effects of soil chemical characteristics on weed species diversity in eastern mashhad region wheat (triticum aestivum l.) fields, an investigation was held in the year 2009. wheat fields were classified based on the acreage from 3-5, 5-10 and higher than 10 ha. five random soil samples were taken using a 5 cm diameter auger from the soil of each experimental field an...

Phosphorus is a macronutrient that plays a number of important roles in plants. It is a component of nucleic acids, so it plays a vital role in plant reproduction, of which grain production is an important result. It is also critical in biological energy transfer processes that are vital for life and growth. Adequate phosphorus results in higher grain production, improved crop quality, greater ...

This study aims to examine the ability of free floating aquatic plants to remove phosphorus and to predict the reduction of phosphorus from rice mill wastewater using soft computing techniques. A mesocosm study was conducted at the mill premises under normal conditions, and reliable results were obtained. Four aquatic plants, namely water hyacinth, water lettuce, salvinia, and duckweed were use...

CHAIRMAN: It is with very great pleasure that we welcome here tonight, members of the South African Chemical Institute. It is a great pleasure to us to be associated in this way with the Durban section of the Chemical Institute. The research consciousness that we spoke about yesterday, of the Industry which we hope to develop in the future, will assist in our many probIems.and render our Associ...