Plant root exudates are important mediators in the interactions that occur between plants and microorganisms in the soil, yet much remains to be learned about spatial and temporal variation in their production. This work outlines a method utilizing a novel colorimetric paper to detect spatial and temporal changes in the production of nitrogen-containing compounds on the root surface. While exis...

An antibiotic, named hypeptin, was isolated from the culture broth of a strain of Pseudomonas sp. The antibiotic was extracted with butanol and purified by chromatography on a Sephadex LH-20 column. The antibiotic is basic in nature. The dihydrochloride is soluble in aqueous alcohols and positive to ninhydrin and Sakaguchi's reaction. A molecular formula, C44H71N13O15.2HCl was indicated by micr...

Objective: The study aimed to develop a simple, efficient, inexpensive, rapid, and reproducible spectrophotometric analytical technique for aminoglycosides analysis by condensing with ninhydrin reagent. Methods: At pH of 8.0, different aminoglycosides, including amikacin, gentamycin, neomycin, streptomycin, were deaminated the working standard solution each component was accurately placed into ...

In a further study of the thermal development of fingermarks on paper and similar surfaces, it is demonstrated that direct contact heating of the substrate using coated or ceramic surfaces at temperatures in excess of 230°C produces results superior to those obtained using hot air. Fingermarks can also be developed in this way on other cellulose-based substrates such as wood and cotton fabric, ...

Some death scene investigations commence without knowledge of the location of the body and/or decomposition site. In these cases, it is necessary to locate the remains or the site where the body decomposed prior to movement. We hypothesized that the burial of a mammalian cadaver will result in the release of ninhydrin reactive nitrogen (NRN) into associated soil and that this reaction might hav...

Ninhydrin reacts with various nitrogen-containing compounds, including some that are released from a body during decomposition. Previous research has shown that ninhydrin can be used to identify gravesoils, however, its potential value in death scene reconstruction has not been previously demonstrated. To explore this possibility, the concentration of ninhydrin-reactive nitrogen (NRN) was measu...