Phosphorus (P) is one of the most important elements required for crop production. The ideal soil pH its absorption by plants about 6.5, but in alkaline and acidic soils, consumed P forms an insoluble complex with calcium, iron, aluminum availability plant decreases. supply needed mainly achieved through chemical fertilizers; however, addition to high price these fertilizers, long run, their de...

As two important physico-chemical parameters, the acidic and alkaline residues of protein are of evident significance for the evaluation of protein properties and the design of relevant separation and analysis. However, there is still no electrophoretic method used for the direct detection of free acidic and alkaline residues of protein. Herein, we developed the concepts of moving reaction boun...

The mobility of fluorescein and bromide used as tracers in packed soil columns was investigated. Five different soils were used in two application methods: soil surface application and soil incorporation, both of which simulate accepted methods of soil application of termiticides to prevent structural infestation. The breakthrough of bromide and fluorescein in column eluates were measured. The ...

Microbial communities are known to play a principal role in petroleum degradation. This study tries determine the composition of bacteria selected crude oil-contaminated soil from Tabasco and Tamaulipas states, Mexico. We determined microbial populations living under these conditions. evaluated structure diversity bacterial contaminated samples. The most abundant phylum is proteobacteria. Next ...

INTRODUCTION The objective was to determine the frequency of gastroesophageal reflux (GER) in mechanically ventilated pediatric patients and its role as a risk factor for ventilator-associated pneumonia (VAP), which may be enhanced among those patients. METHODS The study is a prospective cohort study of mechanically ventilated pediatric patients in the pediatric intensive care unit (PICU) of ...

The stomachs of most vertebrates operate at an acidic pH of 2 generated by the gastric H(+)/K(+)-ATPase located in parietal cells. The acidic pH in stomachs of vertebrates is believed to aid digestion and to protect against environmental pathogens. Little attention has been placed on whether acidic gastric pH regulation is a vertebrate character or a deuterostome ancestral trait. Here, we repor...

The electrochemical oxidation behavior of m-nitrophenol (m-NP) was studied comparatively on glassy carbon electrode, Pt electrode, PbO2 electrode, SnO2 electrode, and graphite electrode using cyclic voltammetry. The cyclic voltammetry measurements were performed in acidic (1 M H2SO4, pH 0.4), neutral (1 M Na2SO4, pH 6.8), and...